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-rw-r--r--arch/nds32/kernel/.gitignore2
-rw-r--r--arch/nds32/kernel/Makefile33
-rw-r--r--arch/nds32/kernel/asm-offsets.c28
-rw-r--r--arch/nds32/kernel/atl2c.c65
-rw-r--r--arch/nds32/kernel/cacheinfo.c49
-rw-r--r--arch/nds32/kernel/devtree.c19
-rw-r--r--arch/nds32/kernel/dma.c82
-rw-r--r--arch/nds32/kernel/ex-entry.S177
-rw-r--r--arch/nds32/kernel/ex-exit.S193
-rw-r--r--arch/nds32/kernel/ex-scall.S100
-rw-r--r--arch/nds32/kernel/fpu.c266
-rw-r--r--arch/nds32/kernel/ftrace.c278
-rw-r--r--arch/nds32/kernel/head.S197
-rw-r--r--arch/nds32/kernel/irq.c9
-rw-r--r--arch/nds32/kernel/module.c278
-rw-r--r--arch/nds32/kernel/nds32_ksyms.c25
-rw-r--r--arch/nds32/kernel/perf_event_cpu.c1500
-rw-r--r--arch/nds32/kernel/pm.c80
-rw-r--r--arch/nds32/kernel/process.c257
-rw-r--r--arch/nds32/kernel/ptrace.c118
-rw-r--r--arch/nds32/kernel/setup.c369
-rw-r--r--arch/nds32/kernel/signal.c384
-rw-r--r--arch/nds32/kernel/sleep.S131
-rw-r--r--arch/nds32/kernel/stacktrace.c53
-rw-r--r--arch/nds32/kernel/sys_nds32.c84
-rw-r--r--arch/nds32/kernel/syscall_table.c17
-rw-r--r--arch/nds32/kernel/time.c11
-rw-r--r--arch/nds32/kernel/traps.c354
-rw-r--r--arch/nds32/kernel/vdso.c231
-rw-r--r--arch/nds32/kernel/vdso/.gitignore2
-rw-r--r--arch/nds32/kernel/vdso/Makefile79
-rw-r--r--arch/nds32/kernel/vdso/datapage.S21
-rwxr-xr-xarch/nds32/kernel/vdso/gen_vdso_offsets.sh15
-rw-r--r--arch/nds32/kernel/vdso/gettimeofday.c269
-rw-r--r--arch/nds32/kernel/vdso/note.S11
-rw-r--r--arch/nds32/kernel/vdso/sigreturn.S19
-rw-r--r--arch/nds32/kernel/vdso/vdso.S18
-rw-r--r--arch/nds32/kernel/vdso/vdso.lds.S75
-rw-r--r--arch/nds32/kernel/vmlinux.lds.S70
39 files changed, 0 insertions, 5969 deletions
diff --git a/arch/nds32/kernel/.gitignore b/arch/nds32/kernel/.gitignore
deleted file mode 100644
index bbb90f92d051..000000000000
--- a/arch/nds32/kernel/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-vmlinux.lds
diff --git a/arch/nds32/kernel/Makefile b/arch/nds32/kernel/Makefile
deleted file mode 100644
index 394df3f6442c..000000000000
--- a/arch/nds32/kernel/Makefile
+++ /dev/null
@@ -1,33 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the linux kernel.
-#
-
-CPPFLAGS_vmlinux.lds := -DTEXTADDR=$(TEXTADDR)
-AFLAGS_head.o := -DTEXTADDR=$(TEXTADDR)
-# Object file lists.
-
-obj-y := ex-entry.o ex-exit.o ex-scall.o irq.o \
- process.o ptrace.o setup.o signal.o \
- sys_nds32.o time.o traps.o cacheinfo.o \
- dma.o syscall_table.o vdso.o
-
-obj-$(CONFIG_MODULES) += nds32_ksyms.o module.o
-obj-$(CONFIG_STACKTRACE) += stacktrace.o
-obj-$(CONFIG_FPU) += fpu.o
-obj-$(CONFIG_OF) += devtree.o
-obj-$(CONFIG_CACHE_L2) += atl2c.o
-obj-$(CONFIG_PERF_EVENTS) += perf_event_cpu.o
-obj-$(CONFIG_PM) += pm.o sleep.o
-extra-y := head.o vmlinux.lds
-
-CFLAGS_fpu.o += -mext-fpu-sp -mext-fpu-dp
-
-
-obj-y += vdso/
-
-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o
-
-ifdef CONFIG_FUNCTION_TRACER
-CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE)
-endif
diff --git a/arch/nds32/kernel/asm-offsets.c b/arch/nds32/kernel/asm-offsets.c
deleted file mode 100644
index 3541d5981de7..000000000000
--- a/arch/nds32/kernel/asm-offsets.c
+++ /dev/null
@@ -1,28 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/sched.h>
-#include <linux/sched/task_stack.h>
-#include <linux/kbuild.h>
-#include <asm/thread_info.h>
-#include <asm/ptrace.h>
-
-int main(void)
-{
- DEFINE(TSK_TI_FLAGS, offsetof(struct task_struct, thread_info.flags));
- DEFINE(TSK_TI_PREEMPT,
- offsetof(struct task_struct, thread_info.preempt_count));
- DEFINE(THREAD_CPU_CONTEXT,
- offsetof(struct task_struct, thread.cpu_context));
- DEFINE(OSP_OFFSET, offsetof(struct pt_regs, osp));
- DEFINE(SP_OFFSET, offsetof(struct pt_regs, sp));
- DEFINE(FUCOP_CTL_OFFSET, offsetof(struct pt_regs, fucop_ctl));
- DEFINE(IPSW_OFFSET, offsetof(struct pt_regs, ipsw));
- DEFINE(SYSCALLNO_OFFSET, offsetof(struct pt_regs, syscallno));
- DEFINE(IPC_OFFSET, offsetof(struct pt_regs, ipc));
- DEFINE(R0_OFFSET, offsetof(struct pt_regs, uregs[0]));
- DEFINE(R15_OFFSET, offsetof(struct pt_regs, uregs[15]));
- DEFINE(CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);
- DEFINE(CLOCK_COARSE_RES, LOW_RES_NSEC);
- return 0;
-}
diff --git a/arch/nds32/kernel/atl2c.c b/arch/nds32/kernel/atl2c.c
deleted file mode 100644
index 0c5386e72098..000000000000
--- a/arch/nds32/kernel/atl2c.c
+++ /dev/null
@@ -1,65 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/compiler.h>
-#include <linux/of_address.h>
-#include <linux/of_fdt.h>
-#include <linux/of_platform.h>
-#include <asm/l2_cache.h>
-
-void __iomem *atl2c_base;
-static const struct of_device_id atl2c_ids[] __initconst = {
- {.compatible = "andestech,atl2c",},
- {}
-};
-
-static int __init atl2c_of_init(void)
-{
- struct device_node *np;
- struct resource res;
- unsigned long tmp = 0;
- unsigned long l2set, l2way, l2clsz;
-
- if (!(__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskL2C))
- return -ENODEV;
-
- np = of_find_matching_node(NULL, atl2c_ids);
- if (!np)
- return -ENODEV;
-
- if (of_address_to_resource(np, 0, &res))
- return -ENODEV;
-
- atl2c_base = ioremap(res.start, resource_size(&res));
- if (!atl2c_base)
- return -ENOMEM;
-
- l2set =
- 64 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2SET) >>
- L2_CA_CONF_offL2SET);
- l2way =
- 1 +
- ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2WAY) >>
- L2_CA_CONF_offL2WAY);
- l2clsz =
- 4 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2CLSZ) >>
- L2_CA_CONF_offL2CLSZ);
- pr_info("L2:%luKB/%luS/%luW/%luB\n",
- l2set * l2way * l2clsz / 1024, l2set, l2way, l2clsz);
-
- tmp = L2C_R_REG(L2CC_PROT_OFF);
- tmp &= ~L2CC_PROT_mskMRWEN;
- L2C_W_REG(L2CC_PROT_OFF, tmp);
-
- tmp = L2C_R_REG(L2CC_SETUP_OFF);
- tmp &= ~L2CC_SETUP_mskPART;
- L2C_W_REG(L2CC_SETUP_OFF, tmp);
-
- tmp = L2C_R_REG(L2CC_CTRL_OFF);
- tmp |= L2CC_CTRL_mskEN;
- L2C_W_REG(L2CC_CTRL_OFF, tmp);
-
- return 0;
-}
-
-subsys_initcall(atl2c_of_init);
diff --git a/arch/nds32/kernel/cacheinfo.c b/arch/nds32/kernel/cacheinfo.c
deleted file mode 100644
index aab98e447feb..000000000000
--- a/arch/nds32/kernel/cacheinfo.c
+++ /dev/null
@@ -1,49 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/bitops.h>
-#include <linux/cacheinfo.h>
-#include <linux/cpu.h>
-
-static void ci_leaf_init(struct cacheinfo *this_leaf,
- enum cache_type type, unsigned int level)
-{
- char cache_type = (type & CACHE_TYPE_INST ? ICACHE : DCACHE);
-
- this_leaf->level = level;
- this_leaf->type = type;
- this_leaf->coherency_line_size = CACHE_LINE_SIZE(cache_type);
- this_leaf->number_of_sets = CACHE_SET(cache_type);
- this_leaf->ways_of_associativity = CACHE_WAY(cache_type);
- this_leaf->size = this_leaf->number_of_sets *
- this_leaf->coherency_line_size * this_leaf->ways_of_associativity;
-#if defined(CONFIG_CPU_DCACHE_WRITETHROUGH)
- this_leaf->attributes = CACHE_WRITE_THROUGH;
-#else
- this_leaf->attributes = CACHE_WRITE_BACK;
-#endif
-}
-
-int init_cache_level(unsigned int cpu)
-{
- struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
-
- /* Only 1 level and I/D cache seperate. */
- this_cpu_ci->num_levels = 1;
- this_cpu_ci->num_leaves = 2;
- return 0;
-}
-
-int populate_cache_leaves(unsigned int cpu)
-{
- unsigned int level, idx;
- struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
- struct cacheinfo *this_leaf = this_cpu_ci->info_list;
-
- for (idx = 0, level = 1; level <= this_cpu_ci->num_levels &&
- idx < this_cpu_ci->num_leaves; idx++, level++) {
- ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level);
- ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level);
- }
- return 0;
-}
diff --git a/arch/nds32/kernel/devtree.c b/arch/nds32/kernel/devtree.c
deleted file mode 100644
index bdce0fe5af9f..000000000000
--- a/arch/nds32/kernel/devtree.c
+++ /dev/null
@@ -1,19 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/bug.h>
-#include <linux/printk.h>
-#include <linux/of_fdt.h>
-
-void __init early_init_devtree(void *params)
-{
- if (!params || !early_init_dt_scan(params)) {
- pr_crit("\n"
- "Error: invalid device tree blob at (virtual address 0x%p)\n"
- "\nPlease check your bootloader.", params);
-
- BUG_ON(1);
- }
-
- dump_stack_set_arch_desc("%s (DT)", of_flat_dt_get_machine_name());
-}
diff --git a/arch/nds32/kernel/dma.c b/arch/nds32/kernel/dma.c
deleted file mode 100644
index 2ac8e6c82a61..000000000000
--- a/arch/nds32/kernel/dma.c
+++ /dev/null
@@ -1,82 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/dma-map-ops.h>
-#include <linux/cache.h>
-#include <linux/highmem.h>
-#include <asm/cacheflush.h>
-#include <asm/tlbflush.h>
-#include <asm/proc-fns.h>
-
-static inline void cache_op(phys_addr_t paddr, size_t size,
- void (*fn)(unsigned long start, unsigned long end))
-{
- struct page *page = pfn_to_page(paddr >> PAGE_SHIFT);
- unsigned offset = paddr & ~PAGE_MASK;
- size_t left = size;
- unsigned long start;
-
- do {
- size_t len = left;
-
- if (PageHighMem(page)) {
- void *addr;
-
- if (offset + len > PAGE_SIZE) {
- if (offset >= PAGE_SIZE) {
- page += offset >> PAGE_SHIFT;
- offset &= ~PAGE_MASK;
- }
- len = PAGE_SIZE - offset;
- }
-
- addr = kmap_atomic(page);
- start = (unsigned long)(addr + offset);
- fn(start, start + len);
- kunmap_atomic(addr);
- } else {
- start = (unsigned long)phys_to_virt(paddr);
- fn(start, start + size);
- }
- offset = 0;
- page++;
- left -= len;
- } while (left);
-}
-
-void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
- enum dma_data_direction dir)
-{
- switch (dir) {
- case DMA_FROM_DEVICE:
- break;
- case DMA_TO_DEVICE:
- case DMA_BIDIRECTIONAL:
- cache_op(paddr, size, cpu_dma_wb_range);
- break;
- default:
- BUG();
- }
-}
-
-void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
- enum dma_data_direction dir)
-{
- switch (dir) {
- case DMA_TO_DEVICE:
- break;
- case DMA_FROM_DEVICE:
- case DMA_BIDIRECTIONAL:
- cache_op(paddr, size, cpu_dma_inval_range);
- break;
- default:
- BUG();
- }
-}
-
-void arch_dma_prep_coherent(struct page *page, size_t size)
-{
- cache_op(page_to_phys(page), size, cpu_dma_wbinval_range);
-}
diff --git a/arch/nds32/kernel/ex-entry.S b/arch/nds32/kernel/ex-entry.S
deleted file mode 100644
index 107d98a1d1b8..000000000000
--- a/arch/nds32/kernel/ex-entry.S
+++ /dev/null
@@ -1,177 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/linkage.h>
-#include <asm/memory.h>
-#include <asm/nds32.h>
-#include <asm/errno.h>
-#include <asm/asm-offsets.h>
-#include <asm/page.h>
-#include <asm/fpu.h>
-
-#ifdef CONFIG_HWZOL
- .macro push_zol
- mfusr $r14, $LB
- mfusr $r15, $LE
- mfusr $r16, $LC
- .endm
-#endif
- .macro skip_save_fucop_ctl
-#if defined(CONFIG_FPU)
-skip_fucop_ctl:
- smw.adm $p0, [$sp], $p0, #0x1
- j fucop_ctl_done
-#endif
- .endm
-
- .macro save_user_regs
-#if defined(CONFIG_FPU)
- sethi $p0, hi20(has_fpu)
- lbsi $p0, [$p0+lo12(has_fpu)]
- beqz $p0, skip_fucop_ctl
- mfsr $p0, $FUCOP_CTL
- smw.adm $p0, [$sp], $p0, #0x1
- bclr $p0, $p0, #FUCOP_CTL_offCP0EN
- mtsr $p0, $FUCOP_CTL
-fucop_ctl_done:
- /* move $SP to the bottom of pt_regs */
- addi $sp, $sp, -FUCOP_CTL_OFFSET
-#else
- smw.adm $sp, [$sp], $sp, #0x1
- /* move $SP to the bottom of pt_regs */
- addi $sp, $sp, -OSP_OFFSET
-#endif
-
- /* push $r0 ~ $r25 */
- smw.bim $r0, [$sp], $r25
- /* push $fp, $gp, $lp */
- smw.bim $sp, [$sp], $sp, #0xe
-
- mfsr $r12, $SP_USR
- mfsr $r13, $IPC
-#ifdef CONFIG_HWZOL
- push_zol
-#endif
- movi $r17, -1
- move $r18, $r0
- mfsr $r19, $PSW
- mfsr $r20, $IPSW
- mfsr $r21, $P_IPSW
- mfsr $r22, $P_IPC
- mfsr $r23, $P_P0
- mfsr $r24, $P_P1
- smw.bim $r12, [$sp], $r24, #0
- addi $sp, $sp, -FUCOP_CTL_OFFSET
-
- /* Initialize kernel space $fp */
- andi $p0, $r20, #PSW_mskPOM
- movi $p1, #0x0
- cmovz $fp, $p1, $p0
-
- andi $r16, $r19, #PSW_mskINTL
- slti $r17, $r16, #4
- bnez $r17, 1f
- addi $r17, $r19, #-2
- mtsr $r17, $PSW
- isb
-1:
- /* If it was superuser mode, we don't need to update $r25 */
- bnez $p0, 2f
- la $p0, __entry_task
- lw $r25, [$p0]
-2:
- .endm
-
- .text
-
-/*
- * Exception Vector
- */
-exception_handlers:
- .long unhandled_exceptions !Reset/NMI
- .long unhandled_exceptions !TLB fill
- .long do_page_fault !PTE not present
- .long do_dispatch_tlb_misc !TLB misc
- .long unhandled_exceptions !TLB VLPT
- .long unhandled_exceptions !Machine Error
- .long do_debug_trap !Debug related
- .long do_dispatch_general !General exception
- .long eh_syscall !Syscall
- .long asm_do_IRQ !IRQ
-
- skip_save_fucop_ctl
-common_exception_handler:
- save_user_regs
- mfsr $p0, $ITYPE
- andi $p0, $p0, #ITYPE_mskVECTOR
- srli $p0, $p0, #ITYPE_offVECTOR
- andi $p1, $p0, #NDS32_VECTOR_mskNONEXCEPTION
- bnez $p1, 1f
- sethi $lp, hi20(ret_from_exception)
- ori $lp, $lp, lo12(ret_from_exception)
- sethi $p1, hi20(exception_handlers)
- ori $p1, $p1, lo12(exception_handlers)
- lw $p1, [$p1+$p0<<2]
- move $r0, $p0
- mfsr $r1, $EVA
- mfsr $r2, $ITYPE
- move $r3, $sp
- mfsr $r4, $OIPC
- /* enable gie if it is enabled in IPSW. */
- mfsr $r21, $PSW
- andi $r20, $r20, #PSW_mskGIE /* r20 is $IPSW*/
- or $r21, $r21, $r20
- mtsr $r21, $PSW
- dsb
- jr $p1
- /* syscall */
-1:
- addi $p1, $p0, #-NDS32_VECTOR_offEXCEPTION
- bnez $p1, 2f
- sethi $lp, hi20(ret_from_exception)
- ori $lp, $lp, lo12(ret_from_exception)
- sethi $p1, hi20(exception_handlers)
- ori $p1, $p1, lo12(exception_handlers)
- lwi $p1, [$p1+#NDS32_VECTOR_offEXCEPTION<<2]
- jr $p1
-
- /* interrupt */
-2:
-#ifdef CONFIG_TRACE_IRQFLAGS
- jal __trace_hardirqs_off
-#endif
- move $r0, $sp
- sethi $lp, hi20(ret_from_intr)
- ori $lp, $lp, lo12(ret_from_intr)
- sethi $p0, hi20(exception_handlers)
- ori $p0, $p0, lo12(exception_handlers)
- lwi $p0, [$p0+#NDS32_VECTOR_offINTERRUPT<<2]
- jr $p0
-
- .macro EXCEPTION_VECTOR_DEBUG
- .align 4
- mfsr $p0, $EDM_CTL
- andi $p0, $p0, EDM_CTL_mskV3_EDM_MODE
- tnez $p0, SWID_RAISE_INTERRUPT_LEVEL
- .endm
-
- .macro EXCEPTION_VECTOR
- .align 4
- sethi $p0, hi20(common_exception_handler)
- ori $p0, $p0, lo12(common_exception_handler)
- jral.ton $p0, $p0
- .endm
-
- .section ".text.init", #alloc, #execinstr
- .global exception_vector
-exception_vector:
-.rept 6
- EXCEPTION_VECTOR
-.endr
- EXCEPTION_VECTOR_DEBUG
-.rept 121
- EXCEPTION_VECTOR
-.endr
- .align 4
- .global exception_vector_end
-exception_vector_end:
diff --git a/arch/nds32/kernel/ex-exit.S b/arch/nds32/kernel/ex-exit.S
deleted file mode 100644
index b30699911b81..000000000000
--- a/arch/nds32/kernel/ex-exit.S
+++ /dev/null
@@ -1,193 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/linkage.h>
-#include <asm/unistd.h>
-#include <asm/assembler.h>
-#include <asm/nds32.h>
-#include <asm/asm-offsets.h>
-#include <asm/thread_info.h>
-#include <asm/current.h>
-#include <asm/fpu.h>
-
-
-
-#ifdef CONFIG_HWZOL
- .macro pop_zol
- mtusr $r14, $LB
- mtusr $r15, $LE
- mtusr $r16, $LC
- .endm
-#endif
-
- .macro restore_user_regs_first
- setgie.d
- isb
-#if defined(CONFIG_FPU)
- addi $sp, $sp, OSP_OFFSET
- lmw.adm $r12, [$sp], $r25, #0x0
- sethi $p0, hi20(has_fpu)
- lbsi $p0, [$p0+lo12(has_fpu)]
- beqz $p0, 2f
- mtsr $r25, $FUCOP_CTL
-2:
-#else
- addi $sp, $sp, FUCOP_CTL_OFFSET
- lmw.adm $r12, [$sp], $r24, #0x0
-#endif
- mtsr $r12, $SP_USR
- mtsr $r13, $IPC
-#ifdef CONFIG_HWZOL
- pop_zol
-#endif
- mtsr $r19, $PSW
- mtsr $r20, $IPSW
- mtsr $r21, $P_IPSW
- mtsr $r22, $P_IPC
- mtsr $r23, $P_P0
- mtsr $r24, $P_P1
- lmw.adm $sp, [$sp], $sp, #0xe
- .endm
-
- .macro restore_user_regs_last
- pop $p0
- cmovn $sp, $p0, $p0
-
- iret
- nop
-
- .endm
-
- .macro restore_user_regs
- restore_user_regs_first
- lmw.adm $r0, [$sp], $r25, #0x0
- addi $sp, $sp, OSP_OFFSET
- restore_user_regs_last
- .endm
-
- .macro fast_restore_user_regs
- restore_user_regs_first
- lmw.adm $r1, [$sp], $r25, #0x0
- addi $sp, $sp, OSP_OFFSET-4
- restore_user_regs_last
- .endm
-
-#ifdef CONFIG_PREEMPTION
- .macro preempt_stop
- .endm
-#else
- .macro preempt_stop
- setgie.d
- isb
- .endm
-#define resume_kernel no_work_pending
-#endif
-
-ENTRY(ret_from_exception)
- preempt_stop
-ENTRY(ret_from_intr)
-
-/*
- * judge Kernel or user mode
- *
- */
- lwi $p0, [$sp+(#IPSW_OFFSET)] ! Check if in nested interrupt
- andi $p0, $p0, #PSW_mskINTL
- bnez $p0, resume_kernel ! done with iret
- j resume_userspace
-
-
-/*
- * This is the fast syscall return path. We do as little as
- * possible here, and this includes saving $r0 back into the SVC
- * stack.
- * fixed: tsk - $r25, syscall # - $r7, syscall table pointer - $r8
- */
-ENTRY(ret_fast_syscall)
- gie_disable
- lwi $r1, [tsk+#TSK_TI_FLAGS]
- andi $p1, $r1, #_TIF_WORK_MASK
- bnez $p1, fast_work_pending
- fast_restore_user_regs ! iret
-
-/*
- * Ok, we need to do extra processing,
- * enter the slow path returning from syscall, while pending work.
- */
-fast_work_pending:
- swi $r0, [$sp+(#R0_OFFSET)] ! what is different from ret_from_exception
-work_pending:
- andi $p1, $r1, #_TIF_NEED_RESCHED
- bnez $p1, work_resched
-
- andi $p1, $r1, #_TIF_SIGPENDING|#_TIF_NOTIFY_RESUME|#_TIF_NOTIFY_SIGNAL
- beqz $p1, no_work_pending
-
- move $r0, $sp ! 'regs'
- gie_enable
- bal do_notify_resume
- b ret_slow_syscall
-work_resched:
- bal schedule ! path, return to user mode
-
-/*
- * "slow" syscall return path.
- */
-ENTRY(resume_userspace)
-ENTRY(ret_slow_syscall)
- gie_disable
- lwi $p0, [$sp+(#IPSW_OFFSET)] ! Check if in nested interrupt
- andi $p0, $p0, #PSW_mskINTL
- bnez $p0, no_work_pending ! done with iret
- lwi $r1, [tsk+#TSK_TI_FLAGS]
- andi $p1, $r1, #_TIF_WORK_MASK
- bnez $p1, work_pending ! handle work_resched, sig_pend
-
-no_work_pending:
-#ifdef CONFIG_TRACE_IRQFLAGS
- lwi $p0, [$sp+(#IPSW_OFFSET)]
- andi $p0, $p0, #0x1
- la $r10, __trace_hardirqs_off
- la $r9, __trace_hardirqs_on
- cmovz $r9, $p0, $r10
- jral $r9
-#endif
- restore_user_regs ! return from iret
-
-
-/*
- * preemptive kernel
- */
-#ifdef CONFIG_PREEMPTION
-resume_kernel:
- gie_disable
- lwi $t0, [tsk+#TSK_TI_PREEMPT]
- bnez $t0, no_work_pending
-
- lwi $t0, [tsk+#TSK_TI_FLAGS]
- andi $p1, $t0, #_TIF_NEED_RESCHED
- beqz $p1, no_work_pending
-
- lwi $t0, [$sp+(#IPSW_OFFSET)] ! Interrupts off?
- andi $t0, $t0, #1
- beqz $t0, no_work_pending
-
- jal preempt_schedule_irq
- b no_work_pending
-#endif
-
-/*
- * This is how we return from a fork.
- */
-ENTRY(ret_from_fork)
- bal schedule_tail
- beqz $r6, 1f ! r6 stores fn for kernel thread
- move $r0, $r7 ! prepare kernel thread arg
- jral $r6
-1:
- lwi $r1, [tsk+#TSK_TI_FLAGS] ! check for syscall tracing
- andi $p1, $r1, #_TIF_WORK_SYSCALL_LEAVE ! are we tracing syscalls?
- beqz $p1, ret_slow_syscall
- move $r0, $sp
- bal syscall_trace_leave
- b ret_slow_syscall
diff --git a/arch/nds32/kernel/ex-scall.S b/arch/nds32/kernel/ex-scall.S
deleted file mode 100644
index 270050f1b7b1..000000000000
--- a/arch/nds32/kernel/ex-scall.S
+++ /dev/null
@@ -1,100 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/linkage.h>
-#include <asm/unistd.h>
-#include <asm/assembler.h>
-#include <asm/nds32.h>
-#include <asm/asm-offsets.h>
-#include <asm/thread_info.h>
-#include <asm/current.h>
-
-/*
- * $r0 = previous task_struct,
- * $r1 = next task_struct,
- * previous and next are guaranteed not to be the same.
- */
-
-ENTRY(__switch_to)
-
- la $p0, __entry_task
- sw $r1, [$p0]
- addi $p1, $r0, #THREAD_CPU_CONTEXT
- smw.bi $r6, [$p1], $r14, #0xb ! push r6~r14, fp, lp, sp
- move $r25, $r1
-#if defined(CONFIG_FPU)
- call _switch_fpu
-#endif
- addi $r1, $r25, #THREAD_CPU_CONTEXT
- lmw.bi $r6, [$r1], $r14, #0xb ! pop r6~r14, fp, lp, sp
- ret
-
-
-#define tbl $r8
-
-/*
- * $r7 will be writen as syscall nr
- */
- .macro get_scno
- lwi $r7, [$sp + R15_OFFSET]
- swi $r7, [$sp + SYSCALLNO_OFFSET]
- .endm
-
- .macro updateipc
- addi $r17, $r13, #4 ! $r13 is $IPC
- swi $r17, [$sp + IPC_OFFSET]
- .endm
-
-ENTRY(eh_syscall)
- updateipc
-
- get_scno
- gie_enable
-
- lwi $p0, [tsk+#TSK_TI_FLAGS] ! check for syscall tracing
-
- andi $p1, $p0, #_TIF_WORK_SYSCALL_ENTRY ! are we tracing syscalls?
- bnez $p1, __sys_trace
-
- la $lp, ret_fast_syscall ! return address
-jmp_systbl:
- addi $p1, $r7, #-__NR_syscalls ! syscall number of syscall instruction is guarded by addembler
- bgez $p1, _SCNO_EXCEED ! call sys_* routine
- la tbl, sys_call_table ! load syscall table pointer
- slli $p1, $r7, #2
- add $p1, tbl, $p1
- lwi $p1, [$p1]
- jr $p1 ! no return
-
-_SCNO_EXCEED:
- ori $r0, $r7, #0
- ori $r1, $sp, #0
- b bad_syscall
-
-/*
- * This is the really slow path. We're going to be doing
- * context switches, and waiting for our parent to respond.
- */
-__sys_trace:
- move $r0, $sp
- bal syscall_trace_enter
- move $r7, $r0
- la $lp, __sys_trace_return ! return address
-
- addi $p1, $r7, #1
- beqz $p1, ret_slow_syscall ! fatal signal is pending
-
- addi $p1, $sp, #R0_OFFSET ! pointer to regs
- lmw.bi $r0, [$p1], $r5 ! have to reload $r0 - $r5
- b jmp_systbl
-
-__sys_trace_return:
- swi $r0, [$sp+#R0_OFFSET] ! T: save returned $r0
- move $r0, $sp ! set pt_regs for syscall_trace_leave
- bal syscall_trace_leave
- b ret_slow_syscall
-
-ENTRY(sys_rt_sigreturn_wrapper)
- addi $r0, $sp, #0
- b sys_rt_sigreturn
-ENDPROC(sys_rt_sigreturn_wrapper)
diff --git a/arch/nds32/kernel/fpu.c b/arch/nds32/kernel/fpu.c
deleted file mode 100644
index 701c09a668de..000000000000
--- a/arch/nds32/kernel/fpu.c
+++ /dev/null
@@ -1,266 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2018 Andes Technology Corporation
-
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/sched/signal.h>
-#include <asm/processor.h>
-#include <asm/user.h>
-#include <asm/io.h>
-#include <asm/bitfield.h>
-#include <asm/fpu.h>
-
-const struct fpu_struct init_fpuregs = {
- .fd_regs = {[0 ... 31] = sNAN64},
- .fpcsr = FPCSR_INIT,
-#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
- .UDF_IEX_trap = 0
-#endif
-};
-
-void save_fpu(struct task_struct *tsk)
-{
- unsigned int fpcfg, fpcsr;
-
- enable_fpu();
- fpcfg = ((__nds32__fmfcfg() & FPCFG_mskFREG) >> FPCFG_offFREG);
- switch (fpcfg) {
- case SP32_DP32_reg:
- asm volatile ("fsdi $fd31, [%0+0xf8]\n\t"
- "fsdi $fd30, [%0+0xf0]\n\t"
- "fsdi $fd29, [%0+0xe8]\n\t"
- "fsdi $fd28, [%0+0xe0]\n\t"
- "fsdi $fd27, [%0+0xd8]\n\t"
- "fsdi $fd26, [%0+0xd0]\n\t"
- "fsdi $fd25, [%0+0xc8]\n\t"
- "fsdi $fd24, [%0+0xc0]\n\t"
- "fsdi $fd23, [%0+0xb8]\n\t"
- "fsdi $fd22, [%0+0xb0]\n\t"
- "fsdi $fd21, [%0+0xa8]\n\t"
- "fsdi $fd20, [%0+0xa0]\n\t"
- "fsdi $fd19, [%0+0x98]\n\t"
- "fsdi $fd18, [%0+0x90]\n\t"
- "fsdi $fd17, [%0+0x88]\n\t"
- "fsdi $fd16, [%0+0x80]\n\t"
- : /* no output */
- : "r" (&tsk->thread.fpu)
- : "memory");
- fallthrough;
- case SP32_DP16_reg:
- asm volatile ("fsdi $fd15, [%0+0x78]\n\t"
- "fsdi $fd14, [%0+0x70]\n\t"
- "fsdi $fd13, [%0+0x68]\n\t"
- "fsdi $fd12, [%0+0x60]\n\t"
- "fsdi $fd11, [%0+0x58]\n\t"
- "fsdi $fd10, [%0+0x50]\n\t"
- "fsdi $fd9, [%0+0x48]\n\t"
- "fsdi $fd8, [%0+0x40]\n\t"
- : /* no output */
- : "r" (&tsk->thread.fpu)
- : "memory");
- fallthrough;
- case SP16_DP8_reg:
- asm volatile ("fsdi $fd7, [%0+0x38]\n\t"
- "fsdi $fd6, [%0+0x30]\n\t"
- "fsdi $fd5, [%0+0x28]\n\t"
- "fsdi $fd4, [%0+0x20]\n\t"
- : /* no output */
- : "r" (&tsk->thread.fpu)
- : "memory");
- fallthrough;
- case SP8_DP4_reg:
- asm volatile ("fsdi $fd3, [%1+0x18]\n\t"
- "fsdi $fd2, [%1+0x10]\n\t"
- "fsdi $fd1, [%1+0x8]\n\t"
- "fsdi $fd0, [%1+0x0]\n\t"
- "fmfcsr %0\n\t"
- "swi %0, [%1+0x100]\n\t"
- : "=&r" (fpcsr)
- : "r"(&tsk->thread.fpu)
- : "memory");
- }
- disable_fpu();
-}
-
-void load_fpu(const struct fpu_struct *fpregs)
-{
- unsigned int fpcfg, fpcsr;
-
- enable_fpu();
- fpcfg = ((__nds32__fmfcfg() & FPCFG_mskFREG) >> FPCFG_offFREG);
- switch (fpcfg) {
- case SP32_DP32_reg:
- asm volatile ("fldi $fd31, [%0+0xf8]\n\t"
- "fldi $fd30, [%0+0xf0]\n\t"
- "fldi $fd29, [%0+0xe8]\n\t"
- "fldi $fd28, [%0+0xe0]\n\t"
- "fldi $fd27, [%0+0xd8]\n\t"
- "fldi $fd26, [%0+0xd0]\n\t"
- "fldi $fd25, [%0+0xc8]\n\t"
- "fldi $fd24, [%0+0xc0]\n\t"
- "fldi $fd23, [%0+0xb8]\n\t"
- "fldi $fd22, [%0+0xb0]\n\t"
- "fldi $fd21, [%0+0xa8]\n\t"
- "fldi $fd20, [%0+0xa0]\n\t"
- "fldi $fd19, [%0+0x98]\n\t"
- "fldi $fd18, [%0+0x90]\n\t"
- "fldi $fd17, [%0+0x88]\n\t"
- "fldi $fd16, [%0+0x80]\n\t"
- : /* no output */
- : "r" (fpregs));
- fallthrough;
- case SP32_DP16_reg:
- asm volatile ("fldi $fd15, [%0+0x78]\n\t"
- "fldi $fd14, [%0+0x70]\n\t"
- "fldi $fd13, [%0+0x68]\n\t"
- "fldi $fd12, [%0+0x60]\n\t"
- "fldi $fd11, [%0+0x58]\n\t"
- "fldi $fd10, [%0+0x50]\n\t"
- "fldi $fd9, [%0+0x48]\n\t"
- "fldi $fd8, [%0+0x40]\n\t"
- : /* no output */
- : "r" (fpregs));
- fallthrough;
- case SP16_DP8_reg:
- asm volatile ("fldi $fd7, [%0+0x38]\n\t"
- "fldi $fd6, [%0+0x30]\n\t"
- "fldi $fd5, [%0+0x28]\n\t"
- "fldi $fd4, [%0+0x20]\n\t"
- : /* no output */
- : "r" (fpregs));
- fallthrough;
- case SP8_DP4_reg:
- asm volatile ("fldi $fd3, [%1+0x18]\n\t"
- "fldi $fd2, [%1+0x10]\n\t"
- "fldi $fd1, [%1+0x8]\n\t"
- "fldi $fd0, [%1+0x0]\n\t"
- "lwi %0, [%1+0x100]\n\t"
- "fmtcsr %0\n\t":"=&r" (fpcsr)
- : "r"(fpregs));
- }
- disable_fpu();
-}
-void store_fpu_for_suspend(void)
-{
-#ifdef CONFIG_LAZY_FPU
- if (last_task_used_math != NULL)
- save_fpu(last_task_used_math);
- last_task_used_math = NULL;
-#else
- if (!used_math())
- return;
- unlazy_fpu(current);
-#endif
- clear_fpu(task_pt_regs(current));
-}
-inline void do_fpu_context_switch(struct pt_regs *regs)
-{
- /* Enable to use FPU. */
-
- if (!user_mode(regs)) {
- pr_err("BUG: FPU is used in kernel mode.\n");
- BUG();
- return;
- }
-
- enable_ptreg_fpu(regs);
-#ifdef CONFIG_LAZY_FPU //Lazy FPU is used
- if (last_task_used_math == current)
- return;
- if (last_task_used_math != NULL)
- /* Other processes fpu state, save away */
- save_fpu(last_task_used_math);
- last_task_used_math = current;
-#endif
- if (used_math()) {
- load_fpu(&current->thread.fpu);
- } else {
- /* First time FPU user. */
- load_fpu(&init_fpuregs);
-#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
- current->thread.fpu.UDF_IEX_trap = init_fpuregs.UDF_IEX_trap;
-#endif
- set_used_math();
- }
-
-}
-
-inline void fill_sigfpe_signo(unsigned int fpcsr, int *signo)
-{
- if (fpcsr & FPCSR_mskOVFT)
- *signo = FPE_FLTOVF;
-#ifndef CONFIG_SUPPORT_DENORMAL_ARITHMETIC
- else if (fpcsr & FPCSR_mskUDFT)
- *signo = FPE_FLTUND;
-#endif
- else if (fpcsr & FPCSR_mskIVOT)
- *signo = FPE_FLTINV;
- else if (fpcsr & FPCSR_mskDBZT)
- *signo = FPE_FLTDIV;
- else if (fpcsr & FPCSR_mskIEXT)
- *signo = FPE_FLTRES;
-}
-
-inline void handle_fpu_exception(struct pt_regs *regs)
-{
- unsigned int fpcsr;
- int si_code = 0, si_signo = SIGFPE;
-#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
- unsigned long redo_except = FPCSR_mskDNIT|FPCSR_mskUDFT|FPCSR_mskIEXT;
-#else
- unsigned long redo_except = FPCSR_mskDNIT;
-#endif
-
- lose_fpu();
- fpcsr = current->thread.fpu.fpcsr;
-
- if (fpcsr & redo_except) {
- si_signo = do_fpuemu(regs, &current->thread.fpu);
- fpcsr = current->thread.fpu.fpcsr;
- if (!si_signo) {
- current->thread.fpu.fpcsr &= ~(redo_except);
- goto done;
- }
- } else if (fpcsr & FPCSR_mskRIT) {
- if (!user_mode(regs))
- make_task_dead(SIGILL);
- si_signo = SIGILL;
- }
-
- switch (si_signo) {
- case SIGFPE:
- fill_sigfpe_signo(fpcsr, &si_code);
- break;
- case SIGILL:
- show_regs(regs);
- si_code = ILL_COPROC;
- break;
- case SIGBUS:
- si_code = BUS_ADRERR;
- break;
- default:
- break;
- }
-
- force_sig_fault(si_signo, si_code,
- (void __user *)instruction_pointer(regs));
-done:
- own_fpu();
-}
-
-bool do_fpu_exception(unsigned int subtype, struct pt_regs *regs)
-{
- int done = true;
- /* Coprocessor disabled exception */
- if (subtype == FPU_DISABLE_EXCEPTION) {
- preempt_disable();
- do_fpu_context_switch(regs);
- preempt_enable();
- }
- /* Coprocessor exception such as underflow and overflow */
- else if (subtype == FPU_EXCEPTION)
- handle_fpu_exception(regs);
- else
- done = false;
- return done;
-}
diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c
deleted file mode 100644
index 711bc8cd186d..000000000000
--- a/arch/nds32/kernel/ftrace.c
+++ /dev/null
@@ -1,278 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/ftrace.h>
-#include <linux/uaccess.h>
-#include <asm/cacheflush.h>
-
-#ifndef CONFIG_DYNAMIC_FTRACE
-extern void (*ftrace_trace_function)(unsigned long, unsigned long,
- struct ftrace_ops*, struct ftrace_regs*);
-extern void ftrace_graph_caller(void);
-
-noinline void __naked ftrace_stub(unsigned long ip, unsigned long parent_ip,
- struct ftrace_ops *op, struct ftrace_regs *fregs)
-{
- __asm__ (""); /* avoid to optimize as pure function */
-}
-
-noinline void _mcount(unsigned long parent_ip)
-{
- /* save all state by the compiler prologue */
-
- unsigned long ip = (unsigned long)__builtin_return_address(0);
-
- if (ftrace_trace_function != ftrace_stub)
- ftrace_trace_function(ip - MCOUNT_INSN_SIZE, parent_ip,
- NULL, NULL);
-
-#ifdef CONFIG_FUNCTION_GRAPH_TRACER
- if (ftrace_graph_return != (trace_func_graph_ret_t)ftrace_stub
- || ftrace_graph_entry != ftrace_graph_entry_stub)
- ftrace_graph_caller();
-#endif
-
- /* restore all state by the compiler epilogue */
-}
-EXPORT_SYMBOL(_mcount);
-
-#else /* CONFIG_DYNAMIC_FTRACE */
-
-noinline void __naked ftrace_stub(unsigned long ip, unsigned long parent_ip,
- struct ftrace_ops *op, struct ftrace_regs *fregs)
-{
- __asm__ (""); /* avoid to optimize as pure function */
-}
-
-noinline void __naked _mcount(unsigned long parent_ip)
-{
- __asm__ (""); /* avoid to optimize as pure function */
-}
-EXPORT_SYMBOL(_mcount);
-
-#define XSTR(s) STR(s)
-#define STR(s) #s
-void _ftrace_caller(unsigned long parent_ip)
-{
- /* save all state needed by the compiler prologue */
-
- /*
- * prepare arguments for real tracing function
- * first arg : __builtin_return_address(0) - MCOUNT_INSN_SIZE
- * second arg : parent_ip
- */
- __asm__ __volatile__ (
- "move $r1, %0 \n\t"
- "addi $r0, %1, #-" XSTR(MCOUNT_INSN_SIZE) "\n\t"
- :
- : "r" (parent_ip), "r" (__builtin_return_address(0)));
-
- /* a placeholder for the call to a real tracing function */
- __asm__ __volatile__ (
- "ftrace_call: \n\t"
- "nop \n\t"
- "nop \n\t"
- "nop \n\t");
-
-#ifdef CONFIG_FUNCTION_GRAPH_TRACER
- /* a placeholder for the call to ftrace_graph_caller */
- __asm__ __volatile__ (
- "ftrace_graph_call: \n\t"
- "nop \n\t"
- "nop \n\t"
- "nop \n\t");
-#endif
- /* restore all state needed by the compiler epilogue */
-}
-
-static unsigned long gen_sethi_insn(unsigned long addr)
-{
- unsigned long opcode = 0x46000000;
- unsigned long imm = addr >> 12;
- unsigned long rt_num = 0xf << 20;
-
- return ENDIAN_CONVERT(opcode | rt_num | imm);
-}
-
-static unsigned long gen_ori_insn(unsigned long addr)
-{
- unsigned long opcode = 0x58000000;
- unsigned long imm = addr & 0x0000fff;
- unsigned long rt_num = 0xf << 20;
- unsigned long ra_num = 0xf << 15;
-
- return ENDIAN_CONVERT(opcode | rt_num | ra_num | imm);
-}
-
-static unsigned long gen_jral_insn(unsigned long addr)
-{
- unsigned long opcode = 0x4a000001;
- unsigned long rt_num = 0x1e << 20;
- unsigned long rb_num = 0xf << 10;
-
- return ENDIAN_CONVERT(opcode | rt_num | rb_num);
-}
-
-static void ftrace_gen_call_insn(unsigned long *call_insns,
- unsigned long addr)
-{
- call_insns[0] = gen_sethi_insn(addr); /* sethi $r15, imm20u */
- call_insns[1] = gen_ori_insn(addr); /* ori $r15, $r15, imm15u */
- call_insns[2] = gen_jral_insn(addr); /* jral $lp, $r15 */
-}
-
-static int __ftrace_modify_code(unsigned long pc, unsigned long *old_insn,
- unsigned long *new_insn, bool validate)
-{
- unsigned long orig_insn[3];
-
- if (validate) {
- if (copy_from_kernel_nofault(orig_insn, (void *)pc,
- MCOUNT_INSN_SIZE))
- return -EFAULT;
- if (memcmp(orig_insn, old_insn, MCOUNT_INSN_SIZE))
- return -EINVAL;
- }
-
- if (copy_to_kernel_nofault((void *)pc, new_insn, MCOUNT_INSN_SIZE))
- return -EPERM;
-
- return 0;
-}
-
-static int ftrace_modify_code(unsigned long pc, unsigned long *old_insn,
- unsigned long *new_insn, bool validate)
-{
- int ret;
-
- ret = __ftrace_modify_code(pc, old_insn, new_insn, validate);
- if (ret)
- return ret;
-
- flush_icache_range(pc, pc + MCOUNT_INSN_SIZE);
-
- return ret;
-}
-
-int ftrace_update_ftrace_func(ftrace_func_t func)
-{
- unsigned long pc = (unsigned long)&ftrace_call;
- unsigned long old_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP};
- unsigned long new_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP};
-
- if (func != ftrace_stub)
- ftrace_gen_call_insn(new_insn, (unsigned long)func);
-
- return ftrace_modify_code(pc, old_insn, new_insn, false);
-}
-
-int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
-{
- unsigned long pc = rec->ip;
- unsigned long nop_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP};
- unsigned long call_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP};
-
- ftrace_gen_call_insn(call_insn, addr);
-
- return ftrace_modify_code(pc, nop_insn, call_insn, true);
-}
-
-int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
- unsigned long addr)
-{
- unsigned long pc = rec->ip;
- unsigned long nop_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP};
- unsigned long call_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP};
-
- ftrace_gen_call_insn(call_insn, addr);
-
- return ftrace_modify_code(pc, call_insn, nop_insn, true);
-}
-#endif /* CONFIG_DYNAMIC_FTRACE */
-
-#ifdef CONFIG_FUNCTION_GRAPH_TRACER
-void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
- unsigned long frame_pointer)
-{
- unsigned long return_hooker = (unsigned long)&return_to_handler;
- unsigned long old;
-
- if (unlikely(atomic_read(&current->tracing_graph_pause)))
- return;
-
- old = *parent;
-
- if (!function_graph_enter(old, self_addr, frame_pointer, NULL))
- *parent = return_hooker;
-}
-
-noinline void ftrace_graph_caller(void)
-{
- unsigned long *parent_ip =
- (unsigned long *)(__builtin_frame_address(2) - 4);
-
- unsigned long selfpc =
- (unsigned long)(__builtin_return_address(1) - MCOUNT_INSN_SIZE);
-
- unsigned long frame_pointer =
- (unsigned long)__builtin_frame_address(3);
-
- prepare_ftrace_return(parent_ip, selfpc, frame_pointer);
-}
-
-extern unsigned long ftrace_return_to_handler(unsigned long frame_pointer);
-void __naked return_to_handler(void)
-{
- __asm__ __volatile__ (
- /* save state needed by the ABI */
- "smw.adm $r0,[$sp],$r1,#0x0 \n\t"
-
- /* get original return address */
- "move $r0, $fp \n\t"
- "bal ftrace_return_to_handler\n\t"
- "move $lp, $r0 \n\t"
-
- /* restore state needed by the ABI */
- "lmw.bim $r0,[$sp],$r1,#0x0 \n\t");
-}
-
-#ifdef CONFIG_DYNAMIC_FTRACE
-extern unsigned long ftrace_graph_call;
-
-static int ftrace_modify_graph_caller(bool enable)
-{
- unsigned long pc = (unsigned long)&ftrace_graph_call;
- unsigned long nop_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP};
- unsigned long call_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP};
-
- ftrace_gen_call_insn(call_insn, (unsigned long)ftrace_graph_caller);
-
- if (enable)
- return ftrace_modify_code(pc, nop_insn, call_insn, true);
- else
- return ftrace_modify_code(pc, call_insn, nop_insn, true);
-}
-
-int ftrace_enable_ftrace_graph_caller(void)
-{
- return ftrace_modify_graph_caller(true);
-}
-
-int ftrace_disable_ftrace_graph_caller(void)
-{
- return ftrace_modify_graph_caller(false);
-}
-#endif /* CONFIG_DYNAMIC_FTRACE */
-
-#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
-
-
-#ifdef CONFIG_TRACE_IRQFLAGS
-noinline void __trace_hardirqs_off(void)
-{
- trace_hardirqs_off();
-}
-noinline void __trace_hardirqs_on(void)
-{
- trace_hardirqs_on();
-}
-#endif /* CONFIG_TRACE_IRQFLAGS */
diff --git a/arch/nds32/kernel/head.S b/arch/nds32/kernel/head.S
deleted file mode 100644
index 7347f00451a9..000000000000
--- a/arch/nds32/kernel/head.S
+++ /dev/null
@@ -1,197 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/linkage.h>
-#include <linux/init.h>
-#include <linux/pgtable.h>
-#include <asm/ptrace.h>
-#include <asm/asm-offsets.h>
-#include <asm/page.h>
-#include <linux/sizes.h>
-#include <asm/thread_info.h>
-
-#ifdef CONFIG_CPU_BIG_ENDIAN
-#define OF_DT_MAGIC 0xd00dfeed
-#else
-#define OF_DT_MAGIC 0xedfe0dd0
-#endif
-
- .globl swapper_pg_dir
- .equ swapper_pg_dir, TEXTADDR - 0x4000
-
-/*
- * Kernel startup entry point.
- */
- .section ".head.text", "ax"
- .type _stext, %function
-ENTRY(_stext)
- setgie.d ! Disable interrupt
- isb
-/*
- * Disable I/D-cache and enable it at a proper time
- */
- mfsr $r0, $mr8
- li $r1, #~(CACHE_CTL_mskIC_EN|CACHE_CTL_mskDC_EN)
- and $r0, $r0, $r1
- mtsr $r0, $mr8
-
-/*
- * Process device tree blob
- */
- andi $r0,$r2,#0x3
- li $r10, 0
- bne $r0, $r10, _nodtb
- lwi $r0, [$r2]
- li $r1, OF_DT_MAGIC
- bne $r0, $r1, _nodtb
- move $r10, $r2
-_nodtb:
-
-/*
- * Create a temporary mapping area for booting, before start_kernel
- */
- sethi $r4, hi20(swapper_pg_dir)
- li $p0, (PAGE_OFFSET - PHYS_OFFSET)
- sub $r4, $r4, $p0
- tlbop FlushAll ! invalidate TLB\n"
- isb
- mtsr $r4, $L1_PPTB ! load page table pointer\n"
-
-#ifdef CONFIG_CPU_DCACHE_DISABLE
- #define MMU_CTL_NTCC MMU_CTL_CACHEABLE_NON
-#else
- #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
- #define MMU_CTL_NTCC MMU_CTL_CACHEABLE_WT
- #else
- #define MMU_CTL_NTCC MMU_CTL_CACHEABLE_WB
- #endif
-#endif
-
-/* set NTC cacheability, mutliple page size in use */
- mfsr $r3, $MMU_CTL
-#if CONFIG_MEMORY_START >= 0xc0000000
- ori $r3, $r3, (MMU_CTL_NTCC << MMU_CTL_offNTC3)
-#elif CONFIG_MEMORY_START >= 0x80000000
- ori $r3, $r3, (MMU_CTL_NTCC << MMU_CTL_offNTC2)
-#elif CONFIG_MEMORY_START >= 0x40000000
- ori $r3, $r3, (MMU_CTL_NTCC << MMU_CTL_offNTC1)
-#else
- ori $r3, $r3, (MMU_CTL_NTCC << MMU_CTL_offNTC0)
-#endif
-
-#ifdef CONFIG_ANDES_PAGE_SIZE_4KB
- ori $r3, $r3, #(MMU_CTL_mskMPZIU)
-#else
- ori $r3, $r3, #(MMU_CTL_mskMPZIU|MMU_CTL_D8KB)
-#endif
-#ifdef CONFIG_HW_SUPPORT_UNALIGNMENT_ACCESS
- li $r0, #MMU_CTL_UNA
- or $r3, $r3, $r0
-#endif
- mtsr $r3, $MMU_CTL
- isb
-
-/* set page size and size of kernel image */
- mfsr $r0, $MMU_CFG
- srli $r3, $r0, MMU_CFG_offfEPSZ
- zeb $r3, $r3
- bnez $r3, _extra_page_size_support
-#ifdef CONFIG_ANDES_PAGE_SIZE_4KB
- li $r5, #SZ_4K ! Use 4KB page size
-#else
- li $r5, #SZ_8K ! Use 8KB page size
- li $r3, #1
-#endif
- mtsr $r3, $TLB_MISC
- b _image_size_check
-
-_extra_page_size_support: ! Use epzs pages size
- clz $r6, $r3
- subri $r2, $r6, #31
- li $r3, #1
- sll $r3, $r3, $r2
- /* MMU_CFG.EPSZ value -> meaning */
- mul $r5, $r3, $r3
- slli $r5, $r5, #14
- /* MMU_CFG.EPSZ -> TLB_MISC.ACC_PSZ */
- addi $r3, $r2, #0x2
- mtsr $r3, $TLB_MISC
-
-_image_size_check:
- /* calculate the image maximum size accepted by TLB config */
- andi $r6, $r0, MMU_CFG_mskTBW
- andi $r0, $r0, MMU_CFG_mskTBS
- srli $r6, $r6, MMU_CFG_offTBW
- srli $r0, $r0, MMU_CFG_offTBS
- addi $r6, $r6, #0x1 ! MMU_CFG.TBW value -> meaning
- addi $r0, $r0, #0x2 ! MMU_CFG.TBS value -> meaning
- sll $r0, $r6, $r0 ! entries = k-way * n-set
- mul $r6, $r0, $r5 ! max size = entries * page size
- /* check kernel image size */
- la $r3, (_end - PAGE_OFFSET)
- bgt $r3, $r6, __error
-
- li $r2, #(PHYS_OFFSET + TLB_DATA_kernel_text_attr)
- li $r3, PAGE_OFFSET
- add $r6, $r6, $r3
-
-_tlb:
- mtsr $r3, $TLB_VPN
- dsb
- tlbop $r2, RWR
- isb
- add $r3, $r3, $r5
- add $r2, $r2, $r5
- bgt $r6, $r3, _tlb
- mfsr $r3, $TLB_MISC ! setup access page size
- li $r2, #~0xf
- and $r3, $r3, $r2
-#ifdef CONFIG_ANDES_PAGE_SIZE_8KB
- ori $r3, $r3, #0x1
-#endif
- mtsr $r3, $TLB_MISC
-
- mfsr $r0, $MISC_CTL ! Enable BTB, RTP, shadow sp, and HW_PRE
- ori $r0, $r0, #MISC_init
- mtsr $r0, $MISC_CTL
-
- mfsr $p1, $PSW
- li $r15, #~PSW_clr ! clear WBNA|DME|IME|DT|IT|POM|INTL|GIE
- and $p1, $p1, $r15
- ori $p1, $p1, #PSW_init
- mtsr $p1, $IPSW ! when iret, it will automatically enable MMU
- la $lp, __mmap_switched
- mtsr $lp, $IPC
- iret
- nop
-
- .type __switch_data, %object
-__switch_data:
- .long __bss_start ! $r6
- .long _end ! $r7
- .long __atags_pointer ! $atag_pointer
- .long init_task ! $r9, move to $r25
- .long init_thread_union + THREAD_SIZE ! $sp
-
-
-/*
- * The following fragment of code is executed with the MMU on in MMU mode,
- * and uses absolute addresses; this is not position independent.
- */
- .align
- .type __mmap_switched, %function
-__mmap_switched:
- la $r3, __switch_data
- lmw.bim $r6, [$r3], $r9, #0b0001
- move $r25, $r9
- move $fp, #0 ! Clear BSS (and zero $fp)
- beq $r7, $r6, _RRT
-1: swi.bi $fp, [$r6], #4
- bne $r7, $r6, 1b
- swi $r10, [$r8]
-
-_RRT:
- b start_kernel
-
-__error:
- b __error
diff --git a/arch/nds32/kernel/irq.c b/arch/nds32/kernel/irq.c
deleted file mode 100644
index 6ff5a672be27..000000000000
--- a/arch/nds32/kernel/irq.c
+++ /dev/null
@@ -1,9 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/irqchip.h>
-
-void __init init_IRQ(void)
-{
- irqchip_init();
-}
diff --git a/arch/nds32/kernel/module.c b/arch/nds32/kernel/module.c
deleted file mode 100644
index 3897fd14a21d..000000000000
--- a/arch/nds32/kernel/module.c
+++ /dev/null
@@ -1,278 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/module.h>
-#include <linux/elf.h>
-#include <linux/vmalloc.h>
-#include <linux/moduleloader.h>
-#include <linux/pgtable.h>
-
-void *module_alloc(unsigned long size)
-{
- return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
- GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE,
- __builtin_return_address(0));
-}
-
-void module_free(struct module *module, void *region)
-{
- vfree(region);
-}
-
-int module_frob_arch_sections(Elf_Ehdr * hdr,
- Elf_Shdr * sechdrs,
- char *secstrings, struct module *mod)
-{
- return 0;
-}
-
-void do_reloc16(unsigned int val, unsigned int *loc, unsigned int val_mask,
- unsigned int val_shift, unsigned int loc_mask,
- unsigned int partial_in_place, unsigned int swap)
-{
- unsigned int tmp = 0, tmp2 = 0;
-
- __asm__ __volatile__("\tlhi.bi\t%0, [%2], 0\n"
- "\tbeqz\t%3, 1f\n"
- "\twsbh\t%0, %1\n"
- "1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap)
- );
-
- tmp2 = tmp & loc_mask;
- if (partial_in_place) {
- tmp &= (~loc_mask);
- tmp =
- tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask);
- } else {
- tmp = tmp2 | ((val & val_mask) >> val_shift);
- }
-
- __asm__ __volatile__("\tbeqz\t%3, 2f\n"
- "\twsbh\t%0, %1\n"
- "2:\n"
- "\tshi.bi\t%0, [%2], 0\n":"=r"(tmp):"0"(tmp),
- "r"(loc), "r"(swap)
- );
-}
-
-void do_reloc32(unsigned int val, unsigned int *loc, unsigned int val_mask,
- unsigned int val_shift, unsigned int loc_mask,
- unsigned int partial_in_place, unsigned int swap)
-{
- unsigned int tmp = 0, tmp2 = 0;
-
- __asm__ __volatile__("\tlmw.bi\t%0, [%2], %0, 0\n"
- "\tbeqz\t%3, 1f\n"
- "\twsbh\t%0, %1\n"
- "\trotri\t%0, %1, 16\n"
- "1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap)
- );
-
- tmp2 = tmp & loc_mask;
- if (partial_in_place) {
- tmp &= (~loc_mask);
- tmp =
- tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask);
- } else {
- tmp = tmp2 | ((val & val_mask) >> val_shift);
- }
-
- __asm__ __volatile__("\tbeqz\t%3, 2f\n"
- "\twsbh\t%0, %1\n"
- "\trotri\t%0, %1, 16\n"
- "2:\n"
- "\tsmw.bi\t%0, [%2], %0, 0\n":"=r"(tmp):"0"(tmp),
- "r"(loc), "r"(swap)
- );
-}
-
-static inline int exceed_limit(int offset, unsigned int val_mask,
- struct module *module, Elf32_Rela * rel,
- unsigned int relindex, unsigned int reloc_order)
-{
- int abs_off = offset < 0 ? ~offset : offset;
-
- if (abs_off & (~val_mask)) {
- pr_err("\n%s: relocation type %d out of range.\n"
- "please rebuild the kernel module with gcc option \"-Wa,-mno-small-text\".\n",
- module->name, ELF32_R_TYPE(rel->r_info));
- pr_err("section %d reloc %d offset 0x%x relative 0x%x.\n",
- relindex, reloc_order, rel->r_offset, offset);
- return true;
- }
- return false;
-}
-
-#ifdef __NDS32_EL__
-#define NEED_SWAP 1
-#else
-#define NEED_SWAP 0
-#endif
-
-int
-apply_relocate_add(Elf32_Shdr * sechdrs, const char *strtab,
- unsigned int symindex, unsigned int relindex,
- struct module *module)
-{
- Elf32_Shdr *symsec = sechdrs + symindex;
- Elf32_Shdr *relsec = sechdrs + relindex;
- Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
- Elf32_Rela *rel = (void *)relsec->sh_addr;
- unsigned int i;
-
- for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rela); i++, rel++) {
- Elf32_Addr *loc;
- Elf32_Sym *sym;
- Elf32_Addr v;
- s32 offset;
-
- offset = ELF32_R_SYM(rel->r_info);
- if (offset < 0
- || offset > (symsec->sh_size / sizeof(Elf32_Sym))) {
- pr_err("%s: bad relocation\n", module->name);
- pr_err("section %d reloc %d\n", relindex, i);
- return -ENOEXEC;
- }
-
- sym = ((Elf32_Sym *) symsec->sh_addr) + offset;
-
- if (rel->r_offset < 0
- || rel->r_offset > dstsec->sh_size - sizeof(u16)) {
- pr_err("%s: out of bounds relocation\n", module->name);
- pr_err("section %d reloc %d offset 0x%0x size %d\n",
- relindex, i, rel->r_offset, dstsec->sh_size);
- return -ENOEXEC;
- }
-
- loc = (Elf32_Addr *) (dstsec->sh_addr + rel->r_offset);
- v = sym->st_value + rel->r_addend;
-
- switch (ELF32_R_TYPE(rel->r_info)) {
- case R_NDS32_NONE:
- case R_NDS32_INSN16:
- case R_NDS32_LABEL:
- case R_NDS32_LONGCALL1:
- case R_NDS32_LONGCALL2:
- case R_NDS32_LONGCALL3:
- case R_NDS32_LONGCALL4:
- case R_NDS32_LONGJUMP1:
- case R_NDS32_LONGJUMP2:
- case R_NDS32_LONGJUMP3:
- case R_NDS32_9_FIXED_RELA:
- case R_NDS32_15_FIXED_RELA:
- case R_NDS32_17_FIXED_RELA:
- case R_NDS32_25_FIXED_RELA:
- case R_NDS32_LOADSTORE:
- case R_NDS32_DWARF2_OP1_RELA:
- case R_NDS32_DWARF2_OP2_RELA:
- case R_NDS32_DWARF2_LEB_RELA:
- case R_NDS32_RELA_NOP_MIX ... R_NDS32_RELA_NOP_MAX:
- break;
-
- case R_NDS32_32_RELA:
- do_reloc32(v, loc, 0xffffffff, 0, 0, 0, 0);
- break;
-
- case R_NDS32_HI20_RELA:
- do_reloc32(v, loc, 0xfffff000, 12, 0xfff00000, 0,
- NEED_SWAP);
- break;
-
- case R_NDS32_LO12S3_RELA:
- do_reloc32(v, loc, 0x00000fff, 3, 0xfffff000, 0,
- NEED_SWAP);
- break;
-
- case R_NDS32_LO12S2_RELA:
- do_reloc32(v, loc, 0x00000fff, 2, 0xfffff000, 0,
- NEED_SWAP);
- break;
-
- case R_NDS32_LO12S1_RELA:
- do_reloc32(v, loc, 0x00000fff, 1, 0xfffff000, 0,
- NEED_SWAP);
- break;
-
- case R_NDS32_LO12S0_RELA:
- case R_NDS32_LO12S0_ORI_RELA:
- do_reloc32(v, loc, 0x00000fff, 0, 0xfffff000, 0,
- NEED_SWAP);
- break;
-
- case R_NDS32_9_PCREL_RELA:
- if (exceed_limit
- ((v - (Elf32_Addr) loc), 0x000000ff, module, rel,
- relindex, i))
- return -ENOEXEC;
- do_reloc16(v - (Elf32_Addr) loc, loc, 0x000001ff, 1,
- 0xffffff00, 0, NEED_SWAP);
- break;
-
- case R_NDS32_15_PCREL_RELA:
- if (exceed_limit
- ((v - (Elf32_Addr) loc), 0x00003fff, module, rel,
- relindex, i))
- return -ENOEXEC;
- do_reloc32(v - (Elf32_Addr) loc, loc, 0x00007fff, 1,
- 0xffffc000, 0, NEED_SWAP);
- break;
-
- case R_NDS32_17_PCREL_RELA:
- if (exceed_limit
- ((v - (Elf32_Addr) loc), 0x0000ffff, module, rel,
- relindex, i))
- return -ENOEXEC;
- do_reloc32(v - (Elf32_Addr) loc, loc, 0x0001ffff, 1,
- 0xffff0000, 0, NEED_SWAP);
- break;
-
- case R_NDS32_25_PCREL_RELA:
- if (exceed_limit
- ((v - (Elf32_Addr) loc), 0x00ffffff, module, rel,
- relindex, i))
- return -ENOEXEC;
- do_reloc32(v - (Elf32_Addr) loc, loc, 0x01ffffff, 1,
- 0xff000000, 0, NEED_SWAP);
- break;
- case R_NDS32_WORD_9_PCREL_RELA:
- if (exceed_limit
- ((v - (Elf32_Addr) loc), 0x000000ff, module, rel,
- relindex, i))
- return -ENOEXEC;
- do_reloc32(v - (Elf32_Addr) loc, loc, 0x000001ff, 1,
- 0xffffff00, 0, NEED_SWAP);
- break;
-
- case R_NDS32_SDA15S3_RELA:
- case R_NDS32_SDA15S2_RELA:
- case R_NDS32_SDA15S1_RELA:
- case R_NDS32_SDA15S0_RELA:
- pr_err("%s: unsupported relocation type %d.\n",
- module->name, ELF32_R_TYPE(rel->r_info));
- pr_err
- ("Small data section access doesn't work in the kernel space; "
- "please rebuild the kernel module with gcc option -mcmodel=large.\n");
- pr_err("section %d reloc %d offset 0x%x size %d\n",
- relindex, i, rel->r_offset, dstsec->sh_size);
- break;
-
- default:
- pr_err("%s: unsupported relocation type %d.\n",
- module->name, ELF32_R_TYPE(rel->r_info));
- pr_err("section %d reloc %d offset 0x%x size %d\n",
- relindex, i, rel->r_offset, dstsec->sh_size);
- }
- }
- return 0;
-}
-
-int
-module_finalize(const Elf32_Ehdr * hdr, const Elf_Shdr * sechdrs,
- struct module *module)
-{
- return 0;
-}
-
-void module_arch_cleanup(struct module *mod)
-{
-}
diff --git a/arch/nds32/kernel/nds32_ksyms.c b/arch/nds32/kernel/nds32_ksyms.c
deleted file mode 100644
index 20719e42ae36..000000000000
--- a/arch/nds32/kernel/nds32_ksyms.c
+++ /dev/null
@@ -1,25 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/delay.h>
-#include <linux/in6.h>
-#include <linux/syscalls.h>
-#include <linux/uaccess.h>
-
-#include <asm/checksum.h>
-#include <asm/io.h>
-#include <asm/ftrace.h>
-#include <asm/proc-fns.h>
-
-/* mem functions */
-EXPORT_SYMBOL(memset);
-EXPORT_SYMBOL(memcpy);
-EXPORT_SYMBOL(memmove);
-EXPORT_SYMBOL(memzero);
-
-/* user mem (segment) */
-EXPORT_SYMBOL(__arch_copy_from_user);
-EXPORT_SYMBOL(__arch_copy_to_user);
-EXPORT_SYMBOL(__arch_clear_user);
diff --git a/arch/nds32/kernel/perf_event_cpu.c b/arch/nds32/kernel/perf_event_cpu.c
deleted file mode 100644
index a78a879e7ef1..000000000000
--- a/arch/nds32/kernel/perf_event_cpu.c
+++ /dev/null
@@ -1,1500 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2008-2017 Andes Technology Corporation
- *
- * Reference ARMv7: Jean Pihet <jpihet@mvista.com>
- * 2010 (c) MontaVista Software, LLC.
- */
-
-#include <linux/perf_event.h>
-#include <linux/bitmap.h>
-#include <linux/export.h>
-#include <linux/kernel.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/pm_runtime.h>
-#include <linux/ftrace.h>
-#include <linux/uaccess.h>
-#include <linux/sched/clock.h>
-#include <linux/percpu-defs.h>
-
-#include <asm/pmu.h>
-#include <asm/irq_regs.h>
-#include <asm/nds32.h>
-#include <asm/stacktrace.h>
-#include <asm/perf_event.h>
-#include <nds32_intrinsic.h>
-
-/* Set at runtime when we know what CPU type we are. */
-static struct nds32_pmu *cpu_pmu;
-
-static DEFINE_PER_CPU(struct pmu_hw_events, cpu_hw_events);
-static void nds32_pmu_start(struct nds32_pmu *cpu_pmu);
-static void nds32_pmu_stop(struct nds32_pmu *cpu_pmu);
-static struct platform_device_id cpu_pmu_plat_device_ids[] = {
- {.name = "nds32-pfm"},
- {},
-};
-
-static int nds32_pmu_map_cache_event(const unsigned int (*cache_map)
- [PERF_COUNT_HW_CACHE_MAX]
- [PERF_COUNT_HW_CACHE_OP_MAX]
- [PERF_COUNT_HW_CACHE_RESULT_MAX], u64 config)
-{
- unsigned int cache_type, cache_op, cache_result, ret;
-
- cache_type = (config >> 0) & 0xff;
- if (cache_type >= PERF_COUNT_HW_CACHE_MAX)
- return -EINVAL;
-
- cache_op = (config >> 8) & 0xff;
- if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX)
- return -EINVAL;
-
- cache_result = (config >> 16) & 0xff;
- if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
- return -EINVAL;
-
- ret = (int)(*cache_map)[cache_type][cache_op][cache_result];
-
- if (ret == CACHE_OP_UNSUPPORTED)
- return -ENOENT;
-
- return ret;
-}
-
-static int
-nds32_pmu_map_hw_event(const unsigned int (*event_map)[PERF_COUNT_HW_MAX],
- u64 config)
-{
- int mapping;
-
- if (config >= PERF_COUNT_HW_MAX)
- return -ENOENT;
-
- mapping = (*event_map)[config];
- return mapping == HW_OP_UNSUPPORTED ? -ENOENT : mapping;
-}
-
-static int nds32_pmu_map_raw_event(u32 raw_event_mask, u64 config)
-{
- int ev_type = (int)(config & raw_event_mask);
- int idx = config >> 8;
-
- switch (idx) {
- case 0:
- ev_type = PFM_OFFSET_MAGIC_0 + ev_type;
- if (ev_type >= SPAV3_0_SEL_LAST || ev_type <= SPAV3_0_SEL_BASE)
- return -ENOENT;
- break;
- case 1:
- ev_type = PFM_OFFSET_MAGIC_1 + ev_type;
- if (ev_type >= SPAV3_1_SEL_LAST || ev_type <= SPAV3_1_SEL_BASE)
- return -ENOENT;
- break;
- case 2:
- ev_type = PFM_OFFSET_MAGIC_2 + ev_type;
- if (ev_type >= SPAV3_2_SEL_LAST || ev_type <= SPAV3_2_SEL_BASE)
- return -ENOENT;
- break;
- default:
- return -ENOENT;
- }
-
- return ev_type;
-}
-
-int
-nds32_pmu_map_event(struct perf_event *event,
- const unsigned int (*event_map)[PERF_COUNT_HW_MAX],
- const unsigned int (*cache_map)
- [PERF_COUNT_HW_CACHE_MAX]
- [PERF_COUNT_HW_CACHE_OP_MAX]
- [PERF_COUNT_HW_CACHE_RESULT_MAX], u32 raw_event_mask)
-{
- u64 config = event->attr.config;
-
- switch (event->attr.type) {
- case PERF_TYPE_HARDWARE:
- return nds32_pmu_map_hw_event(event_map, config);
- case PERF_TYPE_HW_CACHE:
- return nds32_pmu_map_cache_event(cache_map, config);
- case PERF_TYPE_RAW:
- return nds32_pmu_map_raw_event(raw_event_mask, config);
- }
-
- return -ENOENT;
-}
-
-static int nds32_spav3_map_event(struct perf_event *event)
-{
- return nds32_pmu_map_event(event, &nds32_pfm_perf_map,
- &nds32_pfm_perf_cache_map, SOFTWARE_EVENT_MASK);
-}
-
-static inline u32 nds32_pfm_getreset_flags(void)
-{
- /* Read overflow status */
- u32 val = __nds32__mfsr(NDS32_SR_PFM_CTL);
- u32 old_val = val;
-
- /* Write overflow bit to clear status, and others keep it 0 */
- u32 ov_flag = PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2];
-
- __nds32__mtsr(val | ov_flag, NDS32_SR_PFM_CTL);
-
- return old_val;
-}
-
-static inline int nds32_pfm_has_overflowed(u32 pfm)
-{
- u32 ov_flag = PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2];
-
- return pfm & ov_flag;
-}
-
-static inline int nds32_pfm_counter_has_overflowed(u32 pfm, int idx)
-{
- u32 mask = 0;
-
- switch (idx) {
- case 0:
- mask = PFM_CTL_OVF[0];
- break;
- case 1:
- mask = PFM_CTL_OVF[1];
- break;
- case 2:
- mask = PFM_CTL_OVF[2];
- break;
- default:
- pr_err("%s index wrong\n", __func__);
- break;
- }
- return pfm & mask;
-}
-
-/*
- * Set the next IRQ period, based on the hwc->period_left value.
- * To be called with the event disabled in hw:
- */
-int nds32_pmu_event_set_period(struct perf_event *event)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(event->pmu);
- struct hw_perf_event *hwc = &event->hw;
- s64 left = local64_read(&hwc->period_left);
- s64 period = hwc->sample_period;
- int ret = 0;
-
- /* The period may have been changed by PERF_EVENT_IOC_PERIOD */
- if (unlikely(period != hwc->last_period))
- left = period - (hwc->last_period - left);
-
- if (unlikely(left <= -period)) {
- left = period;
- local64_set(&hwc->period_left, left);
- hwc->last_period = period;
- ret = 1;
- }
-
- if (unlikely(left <= 0)) {
- left += period;
- local64_set(&hwc->period_left, left);
- hwc->last_period = period;
- ret = 1;
- }
-
- if (left > (s64)nds32_pmu->max_period)
- left = nds32_pmu->max_period;
-
- /*
- * The hw event starts counting from this event offset,
- * mark it to be able to extract future "deltas":
- */
- local64_set(&hwc->prev_count, (u64)(-left));
-
- nds32_pmu->write_counter(event, (u64)(-left) & nds32_pmu->max_period);
-
- perf_event_update_userpage(event);
-
- return ret;
-}
-
-static irqreturn_t nds32_pmu_handle_irq(int irq_num, void *dev)
-{
- u32 pfm;
- struct perf_sample_data data;
- struct nds32_pmu *cpu_pmu = (struct nds32_pmu *)dev;
- struct pmu_hw_events *cpuc = cpu_pmu->get_hw_events();
- struct pt_regs *regs;
- int idx;
- /*
- * Get and reset the IRQ flags
- */
- pfm = nds32_pfm_getreset_flags();
-
- /*
- * Did an overflow occur?
- */
- if (!nds32_pfm_has_overflowed(pfm))
- return IRQ_NONE;
-
- /*
- * Handle the counter(s) overflow(s)
- */
- regs = get_irq_regs();
-
- nds32_pmu_stop(cpu_pmu);
- for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
- struct perf_event *event = cpuc->events[idx];
- struct hw_perf_event *hwc;
-
- /* Ignore if we don't have an event. */
- if (!event)
- continue;
-
- /*
- * We have a single interrupt for all counters. Check that
- * each counter has overflowed before we process it.
- */
- if (!nds32_pfm_counter_has_overflowed(pfm, idx))
- continue;
-
- hwc = &event->hw;
- nds32_pmu_event_update(event);
- perf_sample_data_init(&data, 0, hwc->last_period);
- if (!nds32_pmu_event_set_period(event))
- continue;
-
- if (perf_event_overflow(event, &data, regs))
- cpu_pmu->disable(event);
- }
- nds32_pmu_start(cpu_pmu);
- /*
- * Handle the pending perf events.
- *
- * Note: this call *must* be run with interrupts disabled. For
- * platforms that can have the PMU interrupts raised as an NMI, this
- * will not work.
- */
- irq_work_run();
-
- return IRQ_HANDLED;
-}
-
-static inline int nds32_pfm_counter_valid(struct nds32_pmu *cpu_pmu, int idx)
-{
- return ((idx >= 0) && (idx < cpu_pmu->num_events));
-}
-
-static inline int nds32_pfm_disable_counter(int idx)
-{
- unsigned int val = __nds32__mfsr(NDS32_SR_PFM_CTL);
- u32 mask = 0;
-
- mask = PFM_CTL_EN[idx];
- val &= ~mask;
- val &= ~(PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2]);
- __nds32__mtsr_isb(val, NDS32_SR_PFM_CTL);
- return idx;
-}
-
-/*
- * Add an event filter to a given event.
- */
-static int nds32_pmu_set_event_filter(struct hw_perf_event *event,
- struct perf_event_attr *attr)
-{
- unsigned long config_base = 0;
- int idx = event->idx;
- unsigned long no_kernel_tracing = 0;
- unsigned long no_user_tracing = 0;
- /* If index is -1, do not do anything */
- if (idx == -1)
- return 0;
-
- no_kernel_tracing = PFM_CTL_KS[idx];
- no_user_tracing = PFM_CTL_KU[idx];
- /*
- * Default: enable both kernel and user mode tracing.
- */
- if (attr->exclude_user)
- config_base |= no_user_tracing;
-
- if (attr->exclude_kernel)
- config_base |= no_kernel_tracing;
-
- /*
- * Install the filter into config_base as this is used to
- * construct the event type.
- */
- event->config_base |= config_base;
- return 0;
-}
-
-static inline void nds32_pfm_write_evtsel(int idx, u32 evnum)
-{
- u32 offset = 0;
- u32 ori_val = __nds32__mfsr(NDS32_SR_PFM_CTL);
- u32 ev_mask = 0;
- u32 no_kernel_mask = 0;
- u32 no_user_mask = 0;
- u32 val;
-
- offset = PFM_CTL_OFFSEL[idx];
- /* Clear previous mode selection, and write new one */
- no_kernel_mask = PFM_CTL_KS[idx];
- no_user_mask = PFM_CTL_KU[idx];
- ori_val &= ~no_kernel_mask;
- ori_val &= ~no_user_mask;
- if (evnum & no_kernel_mask)
- ori_val |= no_kernel_mask;
-
- if (evnum & no_user_mask)
- ori_val |= no_user_mask;
-
- /* Clear previous event selection */
- ev_mask = PFM_CTL_SEL[idx];
- ori_val &= ~ev_mask;
- evnum &= SOFTWARE_EVENT_MASK;
-
- /* undo the linear mapping */
- evnum = get_converted_evet_hw_num(evnum);
- val = ori_val | (evnum << offset);
- val &= ~(PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2]);
- __nds32__mtsr_isb(val, NDS32_SR_PFM_CTL);
-}
-
-static inline int nds32_pfm_enable_counter(int idx)
-{
- unsigned int val = __nds32__mfsr(NDS32_SR_PFM_CTL);
- u32 mask = 0;
-
- mask = PFM_CTL_EN[idx];
- val |= mask;
- val &= ~(PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2]);
- __nds32__mtsr_isb(val, NDS32_SR_PFM_CTL);
- return idx;
-}
-
-static inline int nds32_pfm_enable_intens(int idx)
-{
- unsigned int val = __nds32__mfsr(NDS32_SR_PFM_CTL);
- u32 mask = 0;
-
- mask = PFM_CTL_IE[idx];
- val |= mask;
- val &= ~(PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2]);
- __nds32__mtsr_isb(val, NDS32_SR_PFM_CTL);
- return idx;
-}
-
-static inline int nds32_pfm_disable_intens(int idx)
-{
- unsigned int val = __nds32__mfsr(NDS32_SR_PFM_CTL);
- u32 mask = 0;
-
- mask = PFM_CTL_IE[idx];
- val &= ~mask;
- val &= ~(PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2]);
- __nds32__mtsr_isb(val, NDS32_SR_PFM_CTL);
- return idx;
-}
-
-static int event_requires_mode_exclusion(struct perf_event_attr *attr)
-{
- /* Other modes NDS32 does not support */
- return attr->exclude_user || attr->exclude_kernel;
-}
-
-static void nds32_pmu_enable_event(struct perf_event *event)
-{
- unsigned long flags;
- unsigned int evnum = 0;
- struct hw_perf_event *hwc = &event->hw;
- struct nds32_pmu *cpu_pmu = to_nds32_pmu(event->pmu);
- struct pmu_hw_events *events = cpu_pmu->get_hw_events();
- int idx = hwc->idx;
-
- if (!nds32_pfm_counter_valid(cpu_pmu, idx)) {
- pr_err("CPU enabling wrong pfm counter IRQ enable\n");
- return;
- }
-
- /*
- * Enable counter and interrupt, and set the counter to count
- * the event that we're interested in.
- */
- raw_spin_lock_irqsave(&events->pmu_lock, flags);
-
- /*
- * Disable counter
- */
- nds32_pfm_disable_counter(idx);
-
- /*
- * Check whether we need to exclude the counter from certain modes.
- */
- if ((!cpu_pmu->set_event_filter ||
- cpu_pmu->set_event_filter(hwc, &event->attr)) &&
- event_requires_mode_exclusion(&event->attr)) {
- pr_notice
- ("NDS32 performance counters do not support mode exclusion\n");
- hwc->config_base = 0;
- }
- /* Write event */
- evnum = hwc->config_base;
- nds32_pfm_write_evtsel(idx, evnum);
-
- /*
- * Enable interrupt for this counter
- */
- nds32_pfm_enable_intens(idx);
-
- /*
- * Enable counter
- */
- nds32_pfm_enable_counter(idx);
-
- raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
-}
-
-static void nds32_pmu_disable_event(struct perf_event *event)
-{
- unsigned long flags;
- struct hw_perf_event *hwc = &event->hw;
- struct nds32_pmu *cpu_pmu = to_nds32_pmu(event->pmu);
- struct pmu_hw_events *events = cpu_pmu->get_hw_events();
- int idx = hwc->idx;
-
- if (!nds32_pfm_counter_valid(cpu_pmu, idx)) {
- pr_err("CPU disabling wrong pfm counter IRQ enable %d\n", idx);
- return;
- }
-
- /*
- * Disable counter and interrupt
- */
- raw_spin_lock_irqsave(&events->pmu_lock, flags);
-
- /*
- * Disable counter
- */
- nds32_pfm_disable_counter(idx);
-
- /*
- * Disable interrupt for this counter
- */
- nds32_pfm_disable_intens(idx);
-
- raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
-}
-
-static inline u32 nds32_pmu_read_counter(struct perf_event *event)
-{
- struct nds32_pmu *cpu_pmu = to_nds32_pmu(event->pmu);
- struct hw_perf_event *hwc = &event->hw;
- int idx = hwc->idx;
- u32 count = 0;
-
- if (!nds32_pfm_counter_valid(cpu_pmu, idx)) {
- pr_err("CPU reading wrong counter %d\n", idx);
- } else {
- switch (idx) {
- case PFMC0:
- count = __nds32__mfsr(NDS32_SR_PFMC0);
- break;
- case PFMC1:
- count = __nds32__mfsr(NDS32_SR_PFMC1);
- break;
- case PFMC2:
- count = __nds32__mfsr(NDS32_SR_PFMC2);
- break;
- default:
- pr_err
- ("%s: CPU has no performance counters %d\n",
- __func__, idx);
- }
- }
- return count;
-}
-
-static inline void nds32_pmu_write_counter(struct perf_event *event, u32 value)
-{
- struct nds32_pmu *cpu_pmu = to_nds32_pmu(event->pmu);
- struct hw_perf_event *hwc = &event->hw;
- int idx = hwc->idx;
-
- if (!nds32_pfm_counter_valid(cpu_pmu, idx)) {
- pr_err("CPU writing wrong counter %d\n", idx);
- } else {
- switch (idx) {
- case PFMC0:
- __nds32__mtsr_isb(value, NDS32_SR_PFMC0);
- break;
- case PFMC1:
- __nds32__mtsr_isb(value, NDS32_SR_PFMC1);
- break;
- case PFMC2:
- __nds32__mtsr_isb(value, NDS32_SR_PFMC2);
- break;
- default:
- pr_err
- ("%s: CPU has no performance counters %d\n",
- __func__, idx);
- }
- }
-}
-
-static int nds32_pmu_get_event_idx(struct pmu_hw_events *cpuc,
- struct perf_event *event)
-{
- int idx;
- struct hw_perf_event *hwc = &event->hw;
- /*
- * Current implementation maps cycles, instruction count and cache-miss
- * to specific counter.
- * However, multiple of the 3 counters are able to count these events.
- *
- *
- * SOFTWARE_EVENT_MASK mask for getting event num ,
- * This is defined by Jia-Rung, you can change the polocies.
- * However, do not exceed 8 bits. This is hardware specific.
- * The last number is SPAv3_2_SEL_LAST.
- */
- unsigned long evtype = hwc->config_base & SOFTWARE_EVENT_MASK;
-
- idx = get_converted_event_idx(evtype);
- /*
- * Try to get the counter for correpsonding event
- */
- if (evtype == SPAV3_0_SEL_TOTAL_CYCLES) {
- if (!test_and_set_bit(idx, cpuc->used_mask))
- return idx;
- if (!test_and_set_bit(NDS32_IDX_COUNTER0, cpuc->used_mask))
- return NDS32_IDX_COUNTER0;
- if (!test_and_set_bit(NDS32_IDX_COUNTER1, cpuc->used_mask))
- return NDS32_IDX_COUNTER1;
- } else if (evtype == SPAV3_1_SEL_COMPLETED_INSTRUCTION) {
- if (!test_and_set_bit(idx, cpuc->used_mask))
- return idx;
- else if (!test_and_set_bit(NDS32_IDX_COUNTER1, cpuc->used_mask))
- return NDS32_IDX_COUNTER1;
- else if (!test_and_set_bit
- (NDS32_IDX_CYCLE_COUNTER, cpuc->used_mask))
- return NDS32_IDX_CYCLE_COUNTER;
- } else {
- if (!test_and_set_bit(idx, cpuc->used_mask))
- return idx;
- }
- return -EAGAIN;
-}
-
-static void nds32_pmu_start(struct nds32_pmu *cpu_pmu)
-{
- unsigned long flags;
- unsigned int val;
- struct pmu_hw_events *events = cpu_pmu->get_hw_events();
-
- raw_spin_lock_irqsave(&events->pmu_lock, flags);
-
- /* Enable all counters , NDS PFM has 3 counters */
- val = __nds32__mfsr(NDS32_SR_PFM_CTL);
- val |= (PFM_CTL_EN[0] | PFM_CTL_EN[1] | PFM_CTL_EN[2]);
- val &= ~(PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2]);
- __nds32__mtsr_isb(val, NDS32_SR_PFM_CTL);
-
- raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
-}
-
-static void nds32_pmu_stop(struct nds32_pmu *cpu_pmu)
-{
- unsigned long flags;
- unsigned int val;
- struct pmu_hw_events *events = cpu_pmu->get_hw_events();
-
- raw_spin_lock_irqsave(&events->pmu_lock, flags);
-
- /* Disable all counters , NDS PFM has 3 counters */
- val = __nds32__mfsr(NDS32_SR_PFM_CTL);
- val &= ~(PFM_CTL_EN[0] | PFM_CTL_EN[1] | PFM_CTL_EN[2]);
- val &= ~(PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2]);
- __nds32__mtsr_isb(val, NDS32_SR_PFM_CTL);
-
- raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
-}
-
-static void nds32_pmu_reset(void *info)
-{
- u32 val = 0;
-
- val |= (PFM_CTL_OVF[0] | PFM_CTL_OVF[1] | PFM_CTL_OVF[2]);
- __nds32__mtsr(val, NDS32_SR_PFM_CTL);
- __nds32__mtsr(0, NDS32_SR_PFM_CTL);
- __nds32__mtsr(0, NDS32_SR_PFMC0);
- __nds32__mtsr(0, NDS32_SR_PFMC1);
- __nds32__mtsr(0, NDS32_SR_PFMC2);
-}
-
-static void nds32_pmu_init(struct nds32_pmu *cpu_pmu)
-{
- cpu_pmu->handle_irq = nds32_pmu_handle_irq;
- cpu_pmu->enable = nds32_pmu_enable_event;
- cpu_pmu->disable = nds32_pmu_disable_event;
- cpu_pmu->read_counter = nds32_pmu_read_counter;
- cpu_pmu->write_counter = nds32_pmu_write_counter;
- cpu_pmu->get_event_idx = nds32_pmu_get_event_idx;
- cpu_pmu->start = nds32_pmu_start;
- cpu_pmu->stop = nds32_pmu_stop;
- cpu_pmu->reset = nds32_pmu_reset;
- cpu_pmu->max_period = 0xFFFFFFFF; /* Maximum counts */
-};
-
-static u32 nds32_read_num_pfm_events(void)
-{
- /* NDS32 SPAv3 PMU support 3 counter */
- return 3;
-}
-
-static int device_pmu_init(struct nds32_pmu *cpu_pmu)
-{
- nds32_pmu_init(cpu_pmu);
- /*
- * This name should be devive-specific name, whatever you like :)
- * I think "PMU" will be a good generic name.
- */
- cpu_pmu->name = "nds32v3-pmu";
- cpu_pmu->map_event = nds32_spav3_map_event;
- cpu_pmu->num_events = nds32_read_num_pfm_events();
- cpu_pmu->set_event_filter = nds32_pmu_set_event_filter;
- return 0;
-}
-
-/*
- * CPU PMU identification and probing.
- */
-static int probe_current_pmu(struct nds32_pmu *pmu)
-{
- int ret;
-
- get_cpu();
- ret = -ENODEV;
- /*
- * If ther are various CPU types with its own PMU, initialize with
- *
- * the corresponding one
- */
- device_pmu_init(pmu);
- put_cpu();
- return ret;
-}
-
-static void nds32_pmu_enable(struct pmu *pmu)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(pmu);
- struct pmu_hw_events *hw_events = nds32_pmu->get_hw_events();
- int enabled = bitmap_weight(hw_events->used_mask,
- nds32_pmu->num_events);
-
- if (enabled)
- nds32_pmu->start(nds32_pmu);
-}
-
-static void nds32_pmu_disable(struct pmu *pmu)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(pmu);
-
- nds32_pmu->stop(nds32_pmu);
-}
-
-static void nds32_pmu_release_hardware(struct nds32_pmu *nds32_pmu)
-{
- nds32_pmu->free_irq(nds32_pmu);
- pm_runtime_put_sync(&nds32_pmu->plat_device->dev);
-}
-
-static irqreturn_t nds32_pmu_dispatch_irq(int irq, void *dev)
-{
- struct nds32_pmu *nds32_pmu = (struct nds32_pmu *)dev;
- int ret;
- u64 start_clock, finish_clock;
-
- start_clock = local_clock();
- ret = nds32_pmu->handle_irq(irq, dev);
- finish_clock = local_clock();
-
- perf_sample_event_took(finish_clock - start_clock);
- return ret;
-}
-
-static int nds32_pmu_reserve_hardware(struct nds32_pmu *nds32_pmu)
-{
- int err;
- struct platform_device *pmu_device = nds32_pmu->plat_device;
-
- if (!pmu_device)
- return -ENODEV;
-
- pm_runtime_get_sync(&pmu_device->dev);
- err = nds32_pmu->request_irq(nds32_pmu, nds32_pmu_dispatch_irq);
- if (err) {
- nds32_pmu_release_hardware(nds32_pmu);
- return err;
- }
-
- return 0;
-}
-
-static int
-validate_event(struct pmu *pmu, struct pmu_hw_events *hw_events,
- struct perf_event *event)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(event->pmu);
-
- if (is_software_event(event))
- return 1;
-
- if (event->pmu != pmu)
- return 0;
-
- if (event->state < PERF_EVENT_STATE_OFF)
- return 1;
-
- if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec)
- return 1;
-
- return nds32_pmu->get_event_idx(hw_events, event) >= 0;
-}
-
-static int validate_group(struct perf_event *event)
-{
- struct perf_event *sibling, *leader = event->group_leader;
- struct pmu_hw_events fake_pmu;
- DECLARE_BITMAP(fake_used_mask, MAX_COUNTERS);
- /*
- * Initialize the fake PMU. We only need to populate the
- * used_mask for the purposes of validation.
- */
- memset(fake_used_mask, 0, sizeof(fake_used_mask));
-
- if (!validate_event(event->pmu, &fake_pmu, leader))
- return -EINVAL;
-
- for_each_sibling_event(sibling, leader) {
- if (!validate_event(event->pmu, &fake_pmu, sibling))
- return -EINVAL;
- }
-
- if (!validate_event(event->pmu, &fake_pmu, event))
- return -EINVAL;
-
- return 0;
-}
-
-static int __hw_perf_event_init(struct perf_event *event)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(event->pmu);
- struct hw_perf_event *hwc = &event->hw;
- int mapping;
-
- mapping = nds32_pmu->map_event(event);
-
- if (mapping < 0) {
- pr_debug("event %x:%llx not supported\n", event->attr.type,
- event->attr.config);
- return mapping;
- }
-
- /*
- * We don't assign an index until we actually place the event onto
- * hardware. Use -1 to signify that we haven't decided where to put it
- * yet. For SMP systems, each core has it's own PMU so we can't do any
- * clever allocation or constraints checking at this point.
- */
- hwc->idx = -1;
- hwc->config_base = 0;
- hwc->config = 0;
- hwc->event_base = 0;
-
- /*
- * Check whether we need to exclude the counter from certain modes.
- */
- if ((!nds32_pmu->set_event_filter ||
- nds32_pmu->set_event_filter(hwc, &event->attr)) &&
- event_requires_mode_exclusion(&event->attr)) {
- pr_debug
- ("NDS performance counters do not support mode exclusion\n");
- return -EOPNOTSUPP;
- }
-
- /*
- * Store the event encoding into the config_base field.
- */
- hwc->config_base |= (unsigned long)mapping;
-
- if (!hwc->sample_period) {
- /*
- * For non-sampling runs, limit the sample_period to half
- * of the counter width. That way, the new counter value
- * is far less likely to overtake the previous one unless
- * you have some serious IRQ latency issues.
- */
- hwc->sample_period = nds32_pmu->max_period >> 1;
- hwc->last_period = hwc->sample_period;
- local64_set(&hwc->period_left, hwc->sample_period);
- }
-
- if (event->group_leader != event) {
- if (validate_group(event) != 0)
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int nds32_pmu_event_init(struct perf_event *event)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(event->pmu);
- int err = 0;
- atomic_t *active_events = &nds32_pmu->active_events;
-
- /* does not support taken branch sampling */
- if (has_branch_stack(event))
- return -EOPNOTSUPP;
-
- if (nds32_pmu->map_event(event) == -ENOENT)
- return -ENOENT;
-
- if (!atomic_inc_not_zero(active_events)) {
- if (atomic_read(active_events) == 0) {
- /* Register irq handler */
- err = nds32_pmu_reserve_hardware(nds32_pmu);
- }
-
- if (!err)
- atomic_inc(active_events);
- }
-
- if (err)
- return err;
-
- err = __hw_perf_event_init(event);
-
- return err;
-}
-
-static void nds32_start(struct perf_event *event, int flags)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(event->pmu);
- struct hw_perf_event *hwc = &event->hw;
- /*
- * NDS pmu always has to reprogram the period, so ignore
- * PERF_EF_RELOAD, see the comment below.
- */
- if (flags & PERF_EF_RELOAD)
- WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
-
- hwc->state = 0;
- /* Set the period for the event. */
- nds32_pmu_event_set_period(event);
-
- nds32_pmu->enable(event);
-}
-
-static int nds32_pmu_add(struct perf_event *event, int flags)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(event->pmu);
- struct pmu_hw_events *hw_events = nds32_pmu->get_hw_events();
- struct hw_perf_event *hwc = &event->hw;
- int idx;
- int err = 0;
-
- perf_pmu_disable(event->pmu);
-
- /* If we don't have a space for the counter then finish early. */
- idx = nds32_pmu->get_event_idx(hw_events, event);
- if (idx < 0) {
- err = idx;
- goto out;
- }
-
- /*
- * If there is an event in the counter we are going to use then make
- * sure it is disabled.
- */
- event->hw.idx = idx;
- nds32_pmu->disable(event);
- hw_events->events[idx] = event;
-
- hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
- if (flags & PERF_EF_START)
- nds32_start(event, PERF_EF_RELOAD);
-
- /* Propagate our changes to the userspace mapping. */
- perf_event_update_userpage(event);
-
-out:
- perf_pmu_enable(event->pmu);
- return err;
-}
-
-u64 nds32_pmu_event_update(struct perf_event *event)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(event->pmu);
- struct hw_perf_event *hwc = &event->hw;
- u64 delta, prev_raw_count, new_raw_count;
-
-again:
- prev_raw_count = local64_read(&hwc->prev_count);
- new_raw_count = nds32_pmu->read_counter(event);
-
- if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
- new_raw_count) != prev_raw_count) {
- goto again;
- }
- /*
- * Whether overflow or not, "unsigned substraction"
- * will always get their delta
- */
- delta = (new_raw_count - prev_raw_count) & nds32_pmu->max_period;
-
- local64_add(delta, &event->count);
- local64_sub(delta, &hwc->period_left);
-
- return new_raw_count;
-}
-
-static void nds32_stop(struct perf_event *event, int flags)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(event->pmu);
- struct hw_perf_event *hwc = &event->hw;
- /*
- * NDS pmu always has to update the counter, so ignore
- * PERF_EF_UPDATE, see comments in nds32_start().
- */
- if (!(hwc->state & PERF_HES_STOPPED)) {
- nds32_pmu->disable(event);
- nds32_pmu_event_update(event);
- hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
- }
-}
-
-static void nds32_pmu_del(struct perf_event *event, int flags)
-{
- struct nds32_pmu *nds32_pmu = to_nds32_pmu(event->pmu);
- struct pmu_hw_events *hw_events = nds32_pmu->get_hw_events();
- struct hw_perf_event *hwc = &event->hw;
- int idx = hwc->idx;
-
- nds32_stop(event, PERF_EF_UPDATE);
- hw_events->events[idx] = NULL;
- clear_bit(idx, hw_events->used_mask);
-
- perf_event_update_userpage(event);
-}
-
-static void nds32_pmu_read(struct perf_event *event)
-{
- nds32_pmu_event_update(event);
-}
-
-/* Please refer to SPAv3 for more hardware specific details */
-PMU_FORMAT_ATTR(event, "config:0-63");
-
-static struct attribute *nds32_arch_formats_attr[] = {
- &format_attr_event.attr,
- NULL,
-};
-
-static struct attribute_group nds32_pmu_format_group = {
- .name = "format",
- .attrs = nds32_arch_formats_attr,
-};
-
-static ssize_t nds32_pmu_cpumask_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- return 0;
-}
-
-static DEVICE_ATTR(cpus, 0444, nds32_pmu_cpumask_show, NULL);
-
-static struct attribute *nds32_pmu_common_attrs[] = {
- &dev_attr_cpus.attr,
- NULL,
-};
-
-static struct attribute_group nds32_pmu_common_group = {
- .attrs = nds32_pmu_common_attrs,
-};
-
-static const struct attribute_group *nds32_pmu_attr_groups[] = {
- &nds32_pmu_format_group,
- &nds32_pmu_common_group,
- NULL,
-};
-
-static void nds32_init(struct nds32_pmu *nds32_pmu)
-{
- atomic_set(&nds32_pmu->active_events, 0);
-
- nds32_pmu->pmu = (struct pmu) {
- .pmu_enable = nds32_pmu_enable,
- .pmu_disable = nds32_pmu_disable,
- .attr_groups = nds32_pmu_attr_groups,
- .event_init = nds32_pmu_event_init,
- .add = nds32_pmu_add,
- .del = nds32_pmu_del,
- .start = nds32_start,
- .stop = nds32_stop,
- .read = nds32_pmu_read,
- };
-}
-
-int nds32_pmu_register(struct nds32_pmu *nds32_pmu, int type)
-{
- nds32_init(nds32_pmu);
- pm_runtime_enable(&nds32_pmu->plat_device->dev);
- pr_info("enabled with %s PMU driver, %d counters available\n",
- nds32_pmu->name, nds32_pmu->num_events);
- return perf_pmu_register(&nds32_pmu->pmu, nds32_pmu->name, type);
-}
-
-static struct pmu_hw_events *cpu_pmu_get_cpu_events(void)
-{
- return this_cpu_ptr(&cpu_hw_events);
-}
-
-static int cpu_pmu_request_irq(struct nds32_pmu *cpu_pmu, irq_handler_t handler)
-{
- int err, irq, irqs;
- struct platform_device *pmu_device = cpu_pmu->plat_device;
-
- if (!pmu_device)
- return -ENODEV;
-
- irqs = min(pmu_device->num_resources, num_possible_cpus());
- if (irqs < 1) {
- pr_err("no irqs for PMUs defined\n");
- return -ENODEV;
- }
-
- irq = platform_get_irq(pmu_device, 0);
- err = request_irq(irq, handler, IRQF_NOBALANCING, "nds32-pfm",
- cpu_pmu);
- if (err) {
- pr_err("unable to request IRQ%d for NDS PMU counters\n",
- irq);
- return err;
- }
- return 0;
-}
-
-static void cpu_pmu_free_irq(struct nds32_pmu *cpu_pmu)
-{
- int irq;
- struct platform_device *pmu_device = cpu_pmu->plat_device;
-
- irq = platform_get_irq(pmu_device, 0);
- if (irq >= 0)
- free_irq(irq, cpu_pmu);
-}
-
-static void cpu_pmu_init(struct nds32_pmu *cpu_pmu)
-{
- int cpu;
- struct pmu_hw_events *events = &per_cpu(cpu_hw_events, cpu);
-
- raw_spin_lock_init(&events->pmu_lock);
-
- cpu_pmu->get_hw_events = cpu_pmu_get_cpu_events;
- cpu_pmu->request_irq = cpu_pmu_request_irq;
- cpu_pmu->free_irq = cpu_pmu_free_irq;
-
- /* Ensure the PMU has sane values out of reset. */
- if (cpu_pmu->reset)
- on_each_cpu(cpu_pmu->reset, cpu_pmu, 1);
-}
-
-static const struct of_device_id cpu_pmu_of_device_ids[] = {
- {.compatible = "andestech,nds32v3-pmu",
- .data = device_pmu_init},
- {},
-};
-
-static int cpu_pmu_device_probe(struct platform_device *pdev)
-{
- const struct of_device_id *of_id;
- int (*init_fn)(struct nds32_pmu *nds32_pmu);
- struct device_node *node = pdev->dev.of_node;
- struct nds32_pmu *pmu;
- int ret = -ENODEV;
-
- if (cpu_pmu) {
- pr_notice("[perf] attempt to register multiple PMU devices!\n");
- return -ENOSPC;
- }
-
- pmu = kzalloc(sizeof(*pmu), GFP_KERNEL);
- if (!pmu)
- return -ENOMEM;
-
- of_id = of_match_node(cpu_pmu_of_device_ids, pdev->dev.of_node);
- if (node && of_id) {
- init_fn = of_id->data;
- ret = init_fn(pmu);
- } else {
- ret = probe_current_pmu(pmu);
- }
-
- if (ret) {
- pr_notice("[perf] failed to probe PMU!\n");
- goto out_free;
- }
-
- cpu_pmu = pmu;
- cpu_pmu->plat_device = pdev;
- cpu_pmu_init(cpu_pmu);
- ret = nds32_pmu_register(cpu_pmu, PERF_TYPE_RAW);
-
- if (!ret)
- return 0;
-
-out_free:
- pr_notice("[perf] failed to register PMU devices!\n");
- kfree(pmu);
- return ret;
-}
-
-static struct platform_driver cpu_pmu_driver = {
- .driver = {
- .name = "nds32-pfm",
- .of_match_table = cpu_pmu_of_device_ids,
- },
- .probe = cpu_pmu_device_probe,
- .id_table = cpu_pmu_plat_device_ids,
-};
-
-static int __init register_pmu_driver(void)
-{
- int err = 0;
-
- err = platform_driver_register(&cpu_pmu_driver);
- if (err)
- pr_notice("[perf] PMU initialization failed\n");
- else
- pr_notice("[perf] PMU initialization done\n");
-
- return err;
-}
-
-device_initcall(register_pmu_driver);
-
-/*
- * References: arch/nds32/kernel/traps.c:__dump()
- * You will need to know the NDS ABI first.
- */
-static int unwind_frame_kernel(struct stackframe *frame)
-{
- int graph = 0;
-#ifdef CONFIG_FRAME_POINTER
- /* 0x3 means misalignment */
- if (!kstack_end((void *)frame->fp) &&
- !((unsigned long)frame->fp & 0x3) &&
- ((unsigned long)frame->fp >= TASK_SIZE)) {
- /*
- * The array index is based on the ABI, the below graph
- * illustrate the reasons.
- * Function call procedure: "smw" and "lmw" will always
- * update SP and FP for you automatically.
- *
- * Stack Relative Address
- * | | 0
- * ----
- * |LP| <-- SP(before smw) <-- FP(after smw) -1
- * ----
- * |FP| -2
- * ----
- * | | <-- SP(after smw) -3
- */
- frame->lp = ((unsigned long *)frame->fp)[-1];
- frame->fp = ((unsigned long *)frame->fp)[FP_OFFSET];
- /* make sure CONFIG_FUNCTION_GRAPH_TRACER is turned on */
- if (__kernel_text_address(frame->lp))
- frame->lp = ftrace_graph_ret_addr
- (NULL, &graph, frame->lp, NULL);
-
- return 0;
- } else {
- return -EPERM;
- }
-#else
- /*
- * You can refer to arch/nds32/kernel/traps.c:__dump()
- * Treat "sp" as "fp", but the "sp" is one frame ahead of "fp".
- * And, the "sp" is not always correct.
- *
- * Stack Relative Address
- * | | 0
- * ----
- * |LP| <-- SP(before smw) -1
- * ----
- * | | <-- SP(after smw) -2
- * ----
- */
- if (!kstack_end((void *)frame->sp)) {
- frame->lp = ((unsigned long *)frame->sp)[1];
- /* TODO: How to deal with the value in first
- * "sp" is not correct?
- */
- if (__kernel_text_address(frame->lp))
- frame->lp = ftrace_graph_ret_addr
- (tsk, &graph, frame->lp, NULL);
-
- frame->sp = ((unsigned long *)frame->sp) + 1;
-
- return 0;
- } else {
- return -EPERM;
- }
-#endif
-}
-
-static void notrace
-walk_stackframe(struct stackframe *frame,
- int (*fn_record)(struct stackframe *, void *),
- void *data)
-{
- while (1) {
- int ret;
-
- if (fn_record(frame, data))
- break;
-
- ret = unwind_frame_kernel(frame);
- if (ret < 0)
- break;
- }
-}
-
-/*
- * Gets called by walk_stackframe() for every stackframe. This will be called
- * whist unwinding the stackframe and is like a subroutine return so we use
- * the PC.
- */
-static int callchain_trace(struct stackframe *fr, void *data)
-{
- struct perf_callchain_entry_ctx *entry = data;
-
- perf_callchain_store(entry, fr->lp);
- return 0;
-}
-
-/*
- * Get the return address for a single stackframe and return a pointer to the
- * next frame tail.
- */
-static unsigned long
-user_backtrace(struct perf_callchain_entry_ctx *entry, unsigned long fp)
-{
- struct frame_tail buftail;
- unsigned long lp = 0;
- unsigned long *user_frame_tail =
- (unsigned long *)(fp - (unsigned long)sizeof(buftail));
-
- /* Check accessibility of one struct frame_tail beyond */
- if (!access_ok(user_frame_tail, sizeof(buftail)))
- return 0;
- if (__copy_from_user_inatomic
- (&buftail, user_frame_tail, sizeof(buftail)))
- return 0;
-
- /*
- * Refer to unwind_frame_kernel() for more illurstration
- */
- lp = buftail.stack_lp; /* ((unsigned long *)fp)[-1] */
- fp = buftail.stack_fp; /* ((unsigned long *)fp)[FP_OFFSET] */
- perf_callchain_store(entry, lp);
- return fp;
-}
-
-static unsigned long
-user_backtrace_opt_size(struct perf_callchain_entry_ctx *entry,
- unsigned long fp)
-{
- struct frame_tail_opt_size buftail;
- unsigned long lp = 0;
-
- unsigned long *user_frame_tail =
- (unsigned long *)(fp - (unsigned long)sizeof(buftail));
-
- /* Check accessibility of one struct frame_tail beyond */
- if (!access_ok(user_frame_tail, sizeof(buftail)))
- return 0;
- if (__copy_from_user_inatomic
- (&buftail, user_frame_tail, sizeof(buftail)))
- return 0;
-
- /*
- * Refer to unwind_frame_kernel() for more illurstration
- */
- lp = buftail.stack_lp; /* ((unsigned long *)fp)[-1] */
- fp = buftail.stack_fp; /* ((unsigned long *)fp)[FP_OFFSET] */
-
- perf_callchain_store(entry, lp);
- return fp;
-}
-
-/*
- * This will be called when the target is in user mode
- * This function will only be called when we use
- * "PERF_SAMPLE_CALLCHAIN" in
- * kernel/events/core.c:perf_prepare_sample()
- *
- * How to trigger perf_callchain_[user/kernel] :
- * $ perf record -e cpu-clock --call-graph fp ./program
- * $ perf report --call-graph
- */
-unsigned long leaf_fp;
-void
-perf_callchain_user(struct perf_callchain_entry_ctx *entry,
- struct pt_regs *regs)
-{
- unsigned long fp = 0;
- unsigned long gp = 0;
- unsigned long lp = 0;
- unsigned long sp = 0;
- unsigned long *user_frame_tail;
-
- leaf_fp = 0;
-
- perf_callchain_store(entry, regs->ipc);
- fp = regs->fp;
- gp = regs->gp;
- lp = regs->lp;
- sp = regs->sp;
- if (entry->nr < PERF_MAX_STACK_DEPTH &&
- (unsigned long)fp && !((unsigned long)fp & 0x7) && fp > sp) {
- user_frame_tail =
- (unsigned long *)(fp - (unsigned long)sizeof(fp));
-
- if (!access_ok(user_frame_tail, sizeof(fp)))
- return;
-
- if (__copy_from_user_inatomic
- (&leaf_fp, user_frame_tail, sizeof(fp)))
- return;
-
- if (leaf_fp == lp) {
- /*
- * Maybe this is non leaf function
- * with optimize for size,
- * or maybe this is the function
- * with optimize for size
- */
- struct frame_tail buftail;
-
- user_frame_tail =
- (unsigned long *)(fp -
- (unsigned long)sizeof(buftail));
-
- if (!access_ok(user_frame_tail, sizeof(buftail)))
- return;
-
- if (__copy_from_user_inatomic
- (&buftail, user_frame_tail, sizeof(buftail)))
- return;
-
- if (buftail.stack_fp == gp) {
- /* non leaf function with optimize
- * for size condition
- */
- struct frame_tail_opt_size buftail_opt_size;
-
- user_frame_tail =
- (unsigned long *)(fp - (unsigned long)
- sizeof(buftail_opt_size));
-
- if (!access_ok(user_frame_tail,
- sizeof(buftail_opt_size)))
- return;
-
- if (__copy_from_user_inatomic
- (&buftail_opt_size, user_frame_tail,
- sizeof(buftail_opt_size)))
- return;
-
- perf_callchain_store(entry, lp);
- fp = buftail_opt_size.stack_fp;
-
- while ((entry->nr < PERF_MAX_STACK_DEPTH) &&
- (unsigned long)fp &&
- !((unsigned long)fp & 0x7) &&
- fp > sp) {
- sp = fp;
- fp = user_backtrace_opt_size(entry, fp);
- }
-
- } else {
- /* this is the function
- * without optimize for size
- */
- fp = buftail.stack_fp;
- perf_callchain_store(entry, lp);
- while ((entry->nr < PERF_MAX_STACK_DEPTH) &&
- (unsigned long)fp &&
- !((unsigned long)fp & 0x7) &&
- fp > sp) {
- sp = fp;
- fp = user_backtrace(entry, fp);
- }
- }
- } else {
- /* this is leaf function */
- fp = leaf_fp;
- perf_callchain_store(entry, lp);
-
- /* previous function callcahin */
- while ((entry->nr < PERF_MAX_STACK_DEPTH) &&
- (unsigned long)fp &&
- !((unsigned long)fp & 0x7) && fp > sp) {
- sp = fp;
- fp = user_backtrace(entry, fp);
- }
- }
- return;
- }
-}
-
-/* This will be called when the target is in kernel mode */
-void
-perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
- struct pt_regs *regs)
-{
- struct stackframe fr;
-
- fr.fp = regs->fp;
- fr.lp = regs->lp;
- fr.sp = regs->sp;
- walk_stackframe(&fr, callchain_trace, entry);
-}
-
-unsigned long perf_instruction_pointer(struct pt_regs *regs)
-{
- return instruction_pointer(regs);
-}
-
-unsigned long perf_misc_flags(struct pt_regs *regs)
-{
- int misc = 0;
-
- if (user_mode(regs))
- misc |= PERF_RECORD_MISC_USER;
- else
- misc |= PERF_RECORD_MISC_KERNEL;
-
- return misc;
-}
diff --git a/arch/nds32/kernel/pm.c b/arch/nds32/kernel/pm.c
deleted file mode 100644
index e25700e125d8..000000000000
--- a/arch/nds32/kernel/pm.c
+++ /dev/null
@@ -1,80 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2008-2017 Andes Technology Corporation
-
-#include <linux/init.h>
-#include <linux/suspend.h>
-#include <linux/device.h>
-#include <linux/printk.h>
-#include <asm/suspend.h>
-#include <nds32_intrinsic.h>
-
-unsigned int resume_addr;
-unsigned int *phy_addr_sp_tmp;
-
-static void nds32_suspend2ram(void)
-{
- pgd_t *pgdv;
- p4d_t *p4dv;
- pud_t *pudv;
- pmd_t *pmdv;
- pte_t *ptev;
-
- pgdv = (pgd_t *)__va((__nds32__mfsr(NDS32_SR_L1_PPTB) &
- L1_PPTB_mskBASE)) + pgd_index((unsigned int)cpu_resume);
-
- p4dv = p4d_offset(pgdv, (unsigned int)cpu_resume);
- pudv = pud_offset(p4dv, (unsigned int)cpu_resume);
- pmdv = pmd_offset(pudv, (unsigned int)cpu_resume);
- ptev = pte_offset_map(pmdv, (unsigned int)cpu_resume);
-
- resume_addr = ((*ptev) & TLB_DATA_mskPPN)
- | ((unsigned int)cpu_resume & 0x00000fff);
-
- suspend2ram();
-}
-
-static void nds32_suspend_cpu(void)
-{
- while (!(__nds32__mfsr(NDS32_SR_INT_PEND) & wake_mask))
- __asm__ volatile ("standby no_wake_grant\n\t");
-}
-
-static int nds32_pm_valid(suspend_state_t state)
-{
- switch (state) {
- case PM_SUSPEND_ON:
- case PM_SUSPEND_STANDBY:
- case PM_SUSPEND_MEM:
- return 1;
- default:
- return 0;
- }
-}
-
-static int nds32_pm_enter(suspend_state_t state)
-{
- pr_debug("%s:state:%d\n", __func__, state);
- switch (state) {
- case PM_SUSPEND_STANDBY:
- nds32_suspend_cpu();
- return 0;
- case PM_SUSPEND_MEM:
- nds32_suspend2ram();
- return 0;
- default:
- return -EINVAL;
- }
-}
-
-static const struct platform_suspend_ops nds32_pm_ops = {
- .valid = nds32_pm_valid,
- .enter = nds32_pm_enter,
-};
-
-static int __init nds32_pm_init(void)
-{
- pr_debug("Enter %s\n", __func__);
- suspend_set_ops(&nds32_pm_ops);
- return 0;
-}
-late_initcall(nds32_pm_init);
diff --git a/arch/nds32/kernel/process.c b/arch/nds32/kernel/process.c
deleted file mode 100644
index 49fab9e39cbf..000000000000
--- a/arch/nds32/kernel/process.c
+++ /dev/null
@@ -1,257 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
-#include <linux/sched/task_stack.h>
-#include <linux/delay.h>
-#include <linux/kallsyms.h>
-#include <linux/uaccess.h>
-#include <asm/elf.h>
-#include <asm/proc-fns.h>
-#include <asm/fpu.h>
-#include <linux/ptrace.h>
-#include <linux/reboot.h>
-
-#if IS_ENABLED(CONFIG_LAZY_FPU)
-struct task_struct *last_task_used_math;
-#endif
-
-extern void setup_mm_for_reboot(char mode);
-
-extern inline void arch_reset(char mode)
-{
- if (mode == 's') {
- /* Use cpu handler, jump to 0 */
- cpu_reset(0);
- }
-}
-
-void (*pm_power_off) (void);
-EXPORT_SYMBOL(pm_power_off);
-
-static char reboot_mode_nds32 = 'h';
-
-int __init reboot_setup(char *str)
-{
- reboot_mode_nds32 = str[0];
- return 1;
-}
-
-static int cpub_pwroff(void)
-{
- return 0;
-}
-
-__setup("reboot=", reboot_setup);
-
-void machine_halt(void)
-{
- cpub_pwroff();
-}
-
-EXPORT_SYMBOL(machine_halt);
-
-void machine_power_off(void)
-{
- if (pm_power_off)
- pm_power_off();
-}
-
-EXPORT_SYMBOL(machine_power_off);
-
-void machine_restart(char *cmd)
-{
- /*
- * Clean and disable cache, and turn off interrupts
- */
- cpu_proc_fin();
-
- /*
- * Tell the mm system that we are going to reboot -
- * we may need it to insert some 1:1 mappings so that
- * soft boot works.
- */
- setup_mm_for_reboot(reboot_mode_nds32);
-
- /* Execute kernel restart handler call chain */
- do_kernel_restart(cmd);
-
- /*
- * Now call the architecture specific reboot code.
- */
- arch_reset(reboot_mode_nds32);
-
- /*
- * Whoops - the architecture was unable to reboot.
- * Tell the user!
- */
- mdelay(1000);
- pr_info("Reboot failed -- System halted\n");
- while (1) ;
-}
-
-EXPORT_SYMBOL(machine_restart);
-
-void show_regs(struct pt_regs *regs)
-{
- printk("PC is at %pS\n", (void *)instruction_pointer(regs));
- printk("LP is at %pS\n", (void *)regs->lp);
- pr_info("pc : [<%08lx>] lp : [<%08lx>] %s\n"
- "sp : %08lx fp : %08lx gp : %08lx\n",
- instruction_pointer(regs),
- regs->lp, print_tainted(), regs->sp, regs->fp, regs->gp);
- pr_info("r25: %08lx r24: %08lx\n", regs->uregs[25], regs->uregs[24]);
-
- pr_info("r23: %08lx r22: %08lx r21: %08lx r20: %08lx\n",
- regs->uregs[23], regs->uregs[22],
- regs->uregs[21], regs->uregs[20]);
- pr_info("r19: %08lx r18: %08lx r17: %08lx r16: %08lx\n",
- regs->uregs[19], regs->uregs[18],
- regs->uregs[17], regs->uregs[16]);
- pr_info("r15: %08lx r14: %08lx r13: %08lx r12: %08lx\n",
- regs->uregs[15], regs->uregs[14],
- regs->uregs[13], regs->uregs[12]);
- pr_info("r11: %08lx r10: %08lx r9 : %08lx r8 : %08lx\n",
- regs->uregs[11], regs->uregs[10],
- regs->uregs[9], regs->uregs[8]);
- pr_info("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
- regs->uregs[7], regs->uregs[6], regs->uregs[5], regs->uregs[4]);
- pr_info("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
- regs->uregs[3], regs->uregs[2], regs->uregs[1], regs->uregs[0]);
- pr_info(" IRQs o%s Segment %s\n",
- interrupts_enabled(regs) ? "n" : "ff",
- uaccess_kernel() ? "kernel" : "user");
-}
-
-EXPORT_SYMBOL(show_regs);
-
-void exit_thread(struct task_struct *tsk)
-{
-#if defined(CONFIG_FPU) && defined(CONFIG_LAZY_FPU)
- if (last_task_used_math == tsk)
- last_task_used_math = NULL;
-#endif
-}
-
-void flush_thread(void)
-{
-#if defined(CONFIG_FPU)
- clear_fpu(task_pt_regs(current));
- clear_used_math();
-# ifdef CONFIG_LAZY_FPU
- if (last_task_used_math == current)
- last_task_used_math = NULL;
-# endif
-#endif
-}
-
-DEFINE_PER_CPU(struct task_struct *, __entry_task);
-
-asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
-int copy_thread(unsigned long clone_flags, unsigned long stack_start,
- unsigned long stk_sz, struct task_struct *p, unsigned long tls)
-{
- struct pt_regs *childregs = task_pt_regs(p);
-
- memset(&p->thread.cpu_context, 0, sizeof(struct cpu_context));
-
- if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
- memset(childregs, 0, sizeof(struct pt_regs));
- /* kernel thread fn */
- p->thread.cpu_context.r6 = stack_start;
- /* kernel thread argument */
- p->thread.cpu_context.r7 = stk_sz;
- } else {
- *childregs = *current_pt_regs();
- if (stack_start)
- childregs->sp = stack_start;
- /* child get zero as ret. */
- childregs->uregs[0] = 0;
- childregs->osp = 0;
- if (clone_flags & CLONE_SETTLS)
- childregs->uregs[25] = tls;
- }
- /* cpu context switching */
- p->thread.cpu_context.pc = (unsigned long)ret_from_fork;
- p->thread.cpu_context.sp = (unsigned long)childregs;
-
-#if IS_ENABLED(CONFIG_FPU)
- if (used_math()) {
-# if !IS_ENABLED(CONFIG_LAZY_FPU)
- unlazy_fpu(current);
-# else
- preempt_disable();
- if (last_task_used_math == current)
- save_fpu(current);
- preempt_enable();
-# endif
- p->thread.fpu = current->thread.fpu;
- clear_fpu(task_pt_regs(p));
- set_stopped_child_used_math(p);
- }
-#endif
-
-#ifdef CONFIG_HWZOL
- childregs->lb = 0;
- childregs->le = 0;
- childregs->lc = 0;
-#endif
-
- return 0;
-}
-
-#if IS_ENABLED(CONFIG_FPU)
-struct task_struct *_switch_fpu(struct task_struct *prev, struct task_struct *next)
-{
-#if !IS_ENABLED(CONFIG_LAZY_FPU)
- unlazy_fpu(prev);
-#endif
- if (!(next->flags & PF_KTHREAD))
- clear_fpu(task_pt_regs(next));
- return prev;
-}
-#endif
-
-/*
- * fill in the fpe structure for a core dump...
- */
-int dump_fpu(struct pt_regs *regs, elf_fpregset_t * fpu)
-{
- int fpvalid = 0;
-#if IS_ENABLED(CONFIG_FPU)
- struct task_struct *tsk = current;
-
- fpvalid = tsk_used_math(tsk);
- if (fpvalid) {
- lose_fpu();
- memcpy(fpu, &tsk->thread.fpu, sizeof(*fpu));
- }
-#endif
- return fpvalid;
-}
-
-EXPORT_SYMBOL(dump_fpu);
-
-unsigned long __get_wchan(struct task_struct *p)
-{
- unsigned long fp, lr;
- unsigned long stack_start, stack_end;
- int count = 0;
-
- if (IS_ENABLED(CONFIG_FRAME_POINTER)) {
- stack_start = (unsigned long)end_of_stack(p);
- stack_end = (unsigned long)task_stack_page(p) + THREAD_SIZE;
-
- fp = thread_saved_fp(p);
- do {
- if (fp < stack_start || fp > stack_end)
- return 0;
- lr = ((unsigned long *)fp)[0];
- if (!in_sched_functions(lr))
- return lr;
- fp = *(unsigned long *)(fp + 4);
- } while (count++ < 16);
- }
- return 0;
-}
diff --git a/arch/nds32/kernel/ptrace.c b/arch/nds32/kernel/ptrace.c
deleted file mode 100644
index d0eda870fbc2..000000000000
--- a/arch/nds32/kernel/ptrace.c
+++ /dev/null
@@ -1,118 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/ptrace.h>
-#include <linux/regset.h>
-#include <linux/tracehook.h>
-#include <linux/elf.h>
-#include <linux/sched/task_stack.h>
-
-enum nds32_regset {
- REGSET_GPR,
-};
-
-static int gpr_get(struct task_struct *target,
- const struct user_regset *regset,
- struct membuf to)
-{
- return membuf_write(&to, &task_pt_regs(target)->user_regs,
- sizeof(struct user_pt_regs));
-}
-
-static int gpr_set(struct task_struct *target, const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user * ubuf)
-{
- int err;
- struct user_pt_regs newregs = task_pt_regs(target)->user_regs;
-
- err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, 0, -1);
- if (err)
- return err;
-
- task_pt_regs(target)->user_regs = newregs;
- return 0;
-}
-
-static const struct user_regset nds32_regsets[] = {
- [REGSET_GPR] = {
- .core_note_type = NT_PRSTATUS,
- .n = sizeof(struct user_pt_regs) / sizeof(u32),
- .size = sizeof(elf_greg_t),
- .align = sizeof(elf_greg_t),
- .regset_get = gpr_get,
- .set = gpr_set}
-};
-
-static const struct user_regset_view nds32_user_view = {
- .name = "nds32",
- .e_machine = EM_NDS32,
- .regsets = nds32_regsets,
- .n = ARRAY_SIZE(nds32_regsets)
-};
-
-const struct user_regset_view *task_user_regset_view(struct task_struct *task)
-{
- return &nds32_user_view;
-}
-
-void ptrace_disable(struct task_struct *child)
-{
- user_disable_single_step(child);
-}
-
-/* do_ptrace()
- *
- * Provide ptrace defined service.
- */
-long arch_ptrace(struct task_struct *child, long request, unsigned long addr,
- unsigned long data)
-{
- int ret = -EIO;
-
- switch (request) {
- default:
- ret = ptrace_request(child, request, addr, data);
- break;
- }
-
- return ret;
-}
-
-void user_enable_single_step(struct task_struct *child)
-{
- struct pt_regs *regs;
- regs = task_pt_regs(child);
- regs->ipsw |= PSW_mskHSS;
- set_tsk_thread_flag(child, TIF_SINGLESTEP);
-}
-
-void user_disable_single_step(struct task_struct *child)
-{
- struct pt_regs *regs;
- regs = task_pt_regs(child);
- regs->ipsw &= ~PSW_mskHSS;
- clear_tsk_thread_flag(child, TIF_SINGLESTEP);
-}
-
-/* sys_trace()
- *
- * syscall trace handler.
- */
-
-asmlinkage int syscall_trace_enter(struct pt_regs *regs)
-{
- if (test_thread_flag(TIF_SYSCALL_TRACE)) {
- if (tracehook_report_syscall_entry(regs))
- forget_syscall(regs);
- }
- return regs->syscallno;
-}
-
-asmlinkage void syscall_trace_leave(struct pt_regs *regs)
-{
- int step = test_thread_flag(TIF_SINGLESTEP);
- if (step || test_thread_flag(TIF_SYSCALL_TRACE))
- tracehook_report_syscall_exit(regs, step);
-
-}
diff --git a/arch/nds32/kernel/setup.c b/arch/nds32/kernel/setup.c
deleted file mode 100644
index b3d34d646652..000000000000
--- a/arch/nds32/kernel/setup.c
+++ /dev/null
@@ -1,369 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/cpu.h>
-#include <linux/memblock.h>
-#include <linux/seq_file.h>
-#include <linux/console.h>
-#include <linux/screen_info.h>
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <linux/of_fdt.h>
-#include <linux/of_platform.h>
-#include <asm/setup.h>
-#include <asm/sections.h>
-#include <asm/proc-fns.h>
-#include <asm/cache_info.h>
-#include <asm/elf.h>
-#include <asm/fpu.h>
-#include <nds32_intrinsic.h>
-
-#define HWCAP_MFUSR_PC 0x000001
-#define HWCAP_EXT 0x000002
-#define HWCAP_EXT2 0x000004
-#define HWCAP_FPU 0x000008
-#define HWCAP_AUDIO 0x000010
-#define HWCAP_BASE16 0x000020
-#define HWCAP_STRING 0x000040
-#define HWCAP_REDUCED_REGS 0x000080
-#define HWCAP_VIDEO 0x000100
-#define HWCAP_ENCRYPT 0x000200
-#define HWCAP_EDM 0x000400
-#define HWCAP_LMDMA 0x000800
-#define HWCAP_PFM 0x001000
-#define HWCAP_HSMP 0x002000
-#define HWCAP_TRACE 0x004000
-#define HWCAP_DIV 0x008000
-#define HWCAP_MAC 0x010000
-#define HWCAP_L2C 0x020000
-#define HWCAP_FPU_DP 0x040000
-#define HWCAP_V2 0x080000
-#define HWCAP_DX_REGS 0x100000
-#define HWCAP_HWPRE 0x200000
-
-unsigned long cpu_id, cpu_rev, cpu_cfgid;
-bool has_fpu = false;
-char cpu_series;
-char *endianness = NULL;
-
-unsigned int __atags_pointer __initdata;
-unsigned int elf_hwcap;
-EXPORT_SYMBOL(elf_hwcap);
-
-/*
- * The following string table, must sync with HWCAP_xx bitmask,
- * which is defined above
- */
-static const char *hwcap_str[] = {
- "mfusr_pc",
- "perf1",
- "perf2",
- "fpu",
- "audio",
- "16b",
- "string",
- "reduced_regs",
- "video",
- "encrypt",
- "edm",
- "lmdma",
- "pfm",
- "hsmp",
- "trace",
- "div",
- "mac",
- "l2c",
- "fpu_dp",
- "v2",
- "dx_regs",
- "hw_pre",
- NULL,
-};
-
-#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
-#define WRITE_METHOD "write through"
-#else
-#define WRITE_METHOD "write back"
-#endif
-
-struct cache_info L1_cache_info[2];
-static void __init dump_cpu_info(int cpu)
-{
- int i, p = 0;
- char str[sizeof(hwcap_str) + 16];
-
- for (i = 0; hwcap_str[i]; i++) {
- if (elf_hwcap & (1 << i)) {
- sprintf(str + p, "%s ", hwcap_str[i]);
- p += strlen(hwcap_str[i]) + 1;
- }
- }
-
- pr_info("CPU%d Features: %s\n", cpu, str);
-
- L1_cache_info[ICACHE].ways = CACHE_WAY(ICACHE);
- L1_cache_info[ICACHE].line_size = CACHE_LINE_SIZE(ICACHE);
- L1_cache_info[ICACHE].sets = CACHE_SET(ICACHE);
- L1_cache_info[ICACHE].size =
- L1_cache_info[ICACHE].ways * L1_cache_info[ICACHE].line_size *
- L1_cache_info[ICACHE].sets / 1024;
- pr_info("L1I:%dKB/%dS/%dW/%dB\n", L1_cache_info[ICACHE].size,
- L1_cache_info[ICACHE].sets, L1_cache_info[ICACHE].ways,
- L1_cache_info[ICACHE].line_size);
- L1_cache_info[DCACHE].ways = CACHE_WAY(DCACHE);
- L1_cache_info[DCACHE].line_size = CACHE_LINE_SIZE(DCACHE);
- L1_cache_info[DCACHE].sets = CACHE_SET(DCACHE);
- L1_cache_info[DCACHE].size =
- L1_cache_info[DCACHE].ways * L1_cache_info[DCACHE].line_size *
- L1_cache_info[DCACHE].sets / 1024;
- pr_info("L1D:%dKB/%dS/%dW/%dB\n", L1_cache_info[DCACHE].size,
- L1_cache_info[DCACHE].sets, L1_cache_info[DCACHE].ways,
- L1_cache_info[DCACHE].line_size);
- pr_info("L1 D-Cache is %s\n", WRITE_METHOD);
- if (L1_cache_info[DCACHE].size != L1_CACHE_BYTES)
- pr_crit
- ("The cache line size(%d) of this processor is not the same as L1_CACHE_BYTES(%d).\n",
- L1_cache_info[DCACHE].size, L1_CACHE_BYTES);
-#ifdef CONFIG_CPU_CACHE_ALIASING
- {
- int aliasing_num;
- aliasing_num =
- L1_cache_info[ICACHE].size * 1024 / PAGE_SIZE /
- L1_cache_info[ICACHE].ways;
- L1_cache_info[ICACHE].aliasing_num = aliasing_num;
- L1_cache_info[ICACHE].aliasing_mask =
- (aliasing_num - 1) << PAGE_SHIFT;
- aliasing_num =
- L1_cache_info[DCACHE].size * 1024 / PAGE_SIZE /
- L1_cache_info[DCACHE].ways;
- L1_cache_info[DCACHE].aliasing_num = aliasing_num;
- L1_cache_info[DCACHE].aliasing_mask =
- (aliasing_num - 1) << PAGE_SHIFT;
- }
-#endif
-#ifdef CONFIG_FPU
- /* Disable fpu and enable when it is used. */
- if (has_fpu)
- disable_fpu();
-#endif
-}
-
-static void __init setup_cpuinfo(void)
-{
- unsigned long tmp = 0, cpu_name;
-
- cpu_dcache_inval_all();
- cpu_icache_inval_all();
- __nds32__isb();
-
- cpu_id = (__nds32__mfsr(NDS32_SR_CPU_VER) & CPU_VER_mskCPUID) >> CPU_VER_offCPUID;
- cpu_name = ((cpu_id) & 0xf0) >> 4;
- cpu_series = cpu_name ? cpu_name - 10 + 'A' : 'N';
- cpu_id = cpu_id & 0xf;
- cpu_rev = (__nds32__mfsr(NDS32_SR_CPU_VER) & CPU_VER_mskREV) >> CPU_VER_offREV;
- cpu_cfgid = (__nds32__mfsr(NDS32_SR_CPU_VER) & CPU_VER_mskCFGID) >> CPU_VER_offCFGID;
-
- pr_info("CPU:%c%ld, CPU_VER 0x%08x(id %lu, rev %lu, cfg %lu)\n",
- cpu_series, cpu_id, __nds32__mfsr(NDS32_SR_CPU_VER), cpu_id, cpu_rev, cpu_cfgid);
-
- elf_hwcap |= HWCAP_MFUSR_PC;
-
- if (((__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskBASEV) >> MSC_CFG_offBASEV) == 0) {
- if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskDIV)
- elf_hwcap |= HWCAP_DIV;
-
- if ((__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskMAC)
- || (cpu_id == 12 && cpu_rev < 4))
- elf_hwcap |= HWCAP_MAC;
- } else {
- elf_hwcap |= HWCAP_V2;
- elf_hwcap |= HWCAP_DIV;
- elf_hwcap |= HWCAP_MAC;
- }
-
- if (cpu_cfgid & 0x0001)
- elf_hwcap |= HWCAP_EXT;
-
- if (cpu_cfgid & 0x0002)
- elf_hwcap |= HWCAP_BASE16;
-
- if (cpu_cfgid & 0x0004)
- elf_hwcap |= HWCAP_EXT2;
-
- if (cpu_cfgid & 0x0008) {
- elf_hwcap |= HWCAP_FPU;
- has_fpu = true;
- }
- if (cpu_cfgid & 0x0010)
- elf_hwcap |= HWCAP_STRING;
-
- if (__nds32__mfsr(NDS32_SR_MMU_CFG) & MMU_CFG_mskDE)
- endianness = "MSB";
- else
- endianness = "LSB";
-
- if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskEDM)
- elf_hwcap |= HWCAP_EDM;
-
- if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskLMDMA)
- elf_hwcap |= HWCAP_LMDMA;
-
- if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskPFM)
- elf_hwcap |= HWCAP_PFM;
-
- if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskHSMP)
- elf_hwcap |= HWCAP_HSMP;
-
- if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskTRACE)
- elf_hwcap |= HWCAP_TRACE;
-
- if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskAUDIO)
- elf_hwcap |= HWCAP_AUDIO;
-
- if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskL2C)
- elf_hwcap |= HWCAP_L2C;
-
-#ifdef CONFIG_HW_PRE
- if (__nds32__mfsr(NDS32_SR_MISC_CTL) & MISC_CTL_makHWPRE_EN)
- elf_hwcap |= HWCAP_HWPRE;
-#endif
-
- tmp = __nds32__mfsr(NDS32_SR_CACHE_CTL);
- if (!IS_ENABLED(CONFIG_CPU_DCACHE_DISABLE))
- tmp |= CACHE_CTL_mskDC_EN;
-
- if (!IS_ENABLED(CONFIG_CPU_ICACHE_DISABLE))
- tmp |= CACHE_CTL_mskIC_EN;
- __nds32__mtsr_isb(tmp, NDS32_SR_CACHE_CTL);
-
- dump_cpu_info(smp_processor_id());
-}
-
-static void __init setup_memory(void)
-{
- unsigned long ram_start_pfn;
- unsigned long free_ram_start_pfn;
- phys_addr_t memory_start, memory_end;
-
- memory_end = memory_start = 0;
-
- /* Find main memory where is the kernel */
- memory_start = memblock_start_of_DRAM();
- memory_end = memblock_end_of_DRAM();
-
- if (!memory_end) {
- panic("No memory!");
- }
-
- ram_start_pfn = PFN_UP(memblock_start_of_DRAM());
- /* free_ram_start_pfn is first page after kernel */
- free_ram_start_pfn = PFN_UP(__pa(&_end));
- max_pfn = PFN_DOWN(memblock_end_of_DRAM());
- /* it could update max_pfn */
- if (max_pfn - ram_start_pfn <= MAXMEM_PFN)
- max_low_pfn = max_pfn;
- else {
- max_low_pfn = MAXMEM_PFN + ram_start_pfn;
- if (!IS_ENABLED(CONFIG_HIGHMEM))
- max_pfn = MAXMEM_PFN + ram_start_pfn;
- }
- /* high_memory is related with VMALLOC */
- high_memory = (void *)__va(max_low_pfn * PAGE_SIZE);
- min_low_pfn = free_ram_start_pfn;
-
- /*
- * initialize the boot-time allocator (with low memory only).
- *
- * This makes the memory from the end of the kernel to the end of
- * RAM usable.
- */
- memblock_set_bottom_up(true);
- memblock_reserve(PFN_PHYS(ram_start_pfn), PFN_PHYS(free_ram_start_pfn - ram_start_pfn));
-
- early_init_fdt_reserve_self();
- early_init_fdt_scan_reserved_mem();
-
- memblock_dump_all();
-}
-
-void __init setup_arch(char **cmdline_p)
-{
- early_init_devtree(__atags_pointer ? \
- phys_to_virt(__atags_pointer) : __dtb_start);
-
- setup_cpuinfo();
-
- setup_initial_init_mm(_stext, _etext, _edata, _end);
-
- /* setup bootmem allocator */
- setup_memory();
-
- /* paging_init() sets up the MMU and marks all pages as reserved */
- paging_init();
-
- /* invalidate all TLB entries because the new mapping is created */
- __nds32__tlbop_flua();
-
- /* use generic way to parse */
- parse_early_param();
-
- unflatten_and_copy_device_tree();
-
- *cmdline_p = boot_command_line;
- early_trap_init();
-}
-
-static int c_show(struct seq_file *m, void *v)
-{
- int i;
-
- seq_printf(m, "Processor\t: %c%ld (id %lu, rev %lu, cfg %lu)\n",
- cpu_series, cpu_id, cpu_id, cpu_rev, cpu_cfgid);
-
- seq_printf(m, "L1I\t\t: %luKB/%luS/%luW/%luB\n",
- CACHE_SET(ICACHE) * CACHE_WAY(ICACHE) *
- CACHE_LINE_SIZE(ICACHE) / 1024, CACHE_SET(ICACHE),
- CACHE_WAY(ICACHE), CACHE_LINE_SIZE(ICACHE));
-
- seq_printf(m, "L1D\t\t: %luKB/%luS/%luW/%luB\n",
- CACHE_SET(DCACHE) * CACHE_WAY(DCACHE) *
- CACHE_LINE_SIZE(DCACHE) / 1024, CACHE_SET(DCACHE),
- CACHE_WAY(DCACHE), CACHE_LINE_SIZE(DCACHE));
-
- seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
- loops_per_jiffy / (500000 / HZ),
- (loops_per_jiffy / (5000 / HZ)) % 100);
-
- /* dump out the processor features */
- seq_puts(m, "Features\t: ");
-
- for (i = 0; hwcap_str[i]; i++)
- if (elf_hwcap & (1 << i))
- seq_printf(m, "%s ", hwcap_str[i]);
-
- seq_puts(m, "\n\n");
-
- return 0;
-}
-
-static void *c_start(struct seq_file *m, loff_t * pos)
-{
- return *pos < 1 ? (void *)1 : NULL;
-}
-
-static void *c_next(struct seq_file *m, void *v, loff_t * pos)
-{
- ++*pos;
- return NULL;
-}
-
-static void c_stop(struct seq_file *m, void *v)
-{
-}
-
-struct seq_operations cpuinfo_op = {
- .start = c_start,
- .next = c_next,
- .stop = c_stop,
- .show = c_show
-};
diff --git a/arch/nds32/kernel/signal.c b/arch/nds32/kernel/signal.c
deleted file mode 100644
index 7e3ca430a223..000000000000
--- a/arch/nds32/kernel/signal.c
+++ /dev/null
@@ -1,384 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/ptrace.h>
-#include <linux/personality.h>
-#include <linux/freezer.h>
-#include <linux/tracehook.h>
-#include <linux/uaccess.h>
-
-#include <asm/cacheflush.h>
-#include <asm/ucontext.h>
-#include <asm/unistd.h>
-#include <asm/fpu.h>
-
-#include <asm/ptrace.h>
-#include <asm/vdso.h>
-
-struct rt_sigframe {
- struct siginfo info;
- struct ucontext uc;
-};
-#if IS_ENABLED(CONFIG_FPU)
-static inline int restore_sigcontext_fpu(struct pt_regs *regs,
- struct sigcontext __user *sc)
-{
- struct task_struct *tsk = current;
- unsigned long used_math_flag;
- int ret = 0;
-
- clear_used_math();
- __get_user_error(used_math_flag, &sc->used_math_flag, ret);
-
- if (!used_math_flag)
- return 0;
- set_used_math();
-
-#if IS_ENABLED(CONFIG_LAZY_FPU)
- preempt_disable();
- if (current == last_task_used_math) {
- last_task_used_math = NULL;
- disable_ptreg_fpu(regs);
- }
- preempt_enable();
-#else
- clear_fpu(regs);
-#endif
-
- return __copy_from_user(&tsk->thread.fpu, &sc->fpu,
- sizeof(struct fpu_struct));
-}
-
-static inline int setup_sigcontext_fpu(struct pt_regs *regs,
- struct sigcontext __user *sc)
-{
- struct task_struct *tsk = current;
- int ret = 0;
-
- __put_user_error(used_math(), &sc->used_math_flag, ret);
-
- if (!used_math())
- return ret;
-
- preempt_disable();
-#if IS_ENABLED(CONFIG_LAZY_FPU)
- if (last_task_used_math == tsk)
- save_fpu(last_task_used_math);
-#else
- unlazy_fpu(tsk);
-#endif
- ret = __copy_to_user(&sc->fpu, &tsk->thread.fpu,
- sizeof(struct fpu_struct));
- preempt_enable();
- return ret;
-}
-#endif
-
-static int restore_sigframe(struct pt_regs *regs,
- struct rt_sigframe __user * sf)
-{
- sigset_t set;
- int err;
-
- err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
- if (err == 0) {
- set_current_blocked(&set);
- }
-
- __get_user_error(regs->uregs[0], &sf->uc.uc_mcontext.nds32_r0, err);
- __get_user_error(regs->uregs[1], &sf->uc.uc_mcontext.nds32_r1, err);
- __get_user_error(regs->uregs[2], &sf->uc.uc_mcontext.nds32_r2, err);
- __get_user_error(regs->uregs[3], &sf->uc.uc_mcontext.nds32_r3, err);
- __get_user_error(regs->uregs[4], &sf->uc.uc_mcontext.nds32_r4, err);
- __get_user_error(regs->uregs[5], &sf->uc.uc_mcontext.nds32_r5, err);
- __get_user_error(regs->uregs[6], &sf->uc.uc_mcontext.nds32_r6, err);
- __get_user_error(regs->uregs[7], &sf->uc.uc_mcontext.nds32_r7, err);
- __get_user_error(regs->uregs[8], &sf->uc.uc_mcontext.nds32_r8, err);
- __get_user_error(regs->uregs[9], &sf->uc.uc_mcontext.nds32_r9, err);
- __get_user_error(regs->uregs[10], &sf->uc.uc_mcontext.nds32_r10, err);
- __get_user_error(regs->uregs[11], &sf->uc.uc_mcontext.nds32_r11, err);
- __get_user_error(regs->uregs[12], &sf->uc.uc_mcontext.nds32_r12, err);
- __get_user_error(regs->uregs[13], &sf->uc.uc_mcontext.nds32_r13, err);
- __get_user_error(regs->uregs[14], &sf->uc.uc_mcontext.nds32_r14, err);
- __get_user_error(regs->uregs[15], &sf->uc.uc_mcontext.nds32_r15, err);
- __get_user_error(regs->uregs[16], &sf->uc.uc_mcontext.nds32_r16, err);
- __get_user_error(regs->uregs[17], &sf->uc.uc_mcontext.nds32_r17, err);
- __get_user_error(regs->uregs[18], &sf->uc.uc_mcontext.nds32_r18, err);
- __get_user_error(regs->uregs[19], &sf->uc.uc_mcontext.nds32_r19, err);
- __get_user_error(regs->uregs[20], &sf->uc.uc_mcontext.nds32_r20, err);
- __get_user_error(regs->uregs[21], &sf->uc.uc_mcontext.nds32_r21, err);
- __get_user_error(regs->uregs[22], &sf->uc.uc_mcontext.nds32_r22, err);
- __get_user_error(regs->uregs[23], &sf->uc.uc_mcontext.nds32_r23, err);
- __get_user_error(regs->uregs[24], &sf->uc.uc_mcontext.nds32_r24, err);
- __get_user_error(regs->uregs[25], &sf->uc.uc_mcontext.nds32_r25, err);
-
- __get_user_error(regs->fp, &sf->uc.uc_mcontext.nds32_fp, err);
- __get_user_error(regs->gp, &sf->uc.uc_mcontext.nds32_gp, err);
- __get_user_error(regs->lp, &sf->uc.uc_mcontext.nds32_lp, err);
- __get_user_error(regs->sp, &sf->uc.uc_mcontext.nds32_sp, err);
- __get_user_error(regs->ipc, &sf->uc.uc_mcontext.nds32_ipc, err);
-#if defined(CONFIG_HWZOL)
- __get_user_error(regs->lc, &sf->uc.uc_mcontext.zol.nds32_lc, err);
- __get_user_error(regs->le, &sf->uc.uc_mcontext.zol.nds32_le, err);
- __get_user_error(regs->lb, &sf->uc.uc_mcontext.zol.nds32_lb, err);
-#endif
-#if IS_ENABLED(CONFIG_FPU)
- err |= restore_sigcontext_fpu(regs, &sf->uc.uc_mcontext);
-#endif
- /*
- * Avoid sys_rt_sigreturn() restarting.
- */
- forget_syscall(regs);
- return err;
-}
-
-asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame;
-
- /* Always make any pending restarted system calls return -EINTR */
- current->restart_block.fn = do_no_restart_syscall;
-
- /*
- * Since we stacked the signal on a 64-bit boundary,
- * then 'sp' should be two-word aligned here. If it's
- * not, then the user is trying to mess with us.
- */
- if (regs->sp & 7)
- goto badframe;
-
- frame = (struct rt_sigframe __user *)regs->sp;
-
- if (!access_ok(frame, sizeof(*frame)))
- goto badframe;
-
- if (restore_sigframe(regs, frame))
- goto badframe;
-
- if (restore_altstack(&frame->uc.uc_stack))
- goto badframe;
-
- return regs->uregs[0];
-
-badframe:
- force_sig(SIGSEGV);
- return 0;
-}
-
-static int
-setup_sigframe(struct rt_sigframe __user * sf, struct pt_regs *regs,
- sigset_t * set)
-{
- int err = 0;
-
- __put_user_error(regs->uregs[0], &sf->uc.uc_mcontext.nds32_r0, err);
- __put_user_error(regs->uregs[1], &sf->uc.uc_mcontext.nds32_r1, err);
- __put_user_error(regs->uregs[2], &sf->uc.uc_mcontext.nds32_r2, err);
- __put_user_error(regs->uregs[3], &sf->uc.uc_mcontext.nds32_r3, err);
- __put_user_error(regs->uregs[4], &sf->uc.uc_mcontext.nds32_r4, err);
- __put_user_error(regs->uregs[5], &sf->uc.uc_mcontext.nds32_r5, err);
- __put_user_error(regs->uregs[6], &sf->uc.uc_mcontext.nds32_r6, err);
- __put_user_error(regs->uregs[7], &sf->uc.uc_mcontext.nds32_r7, err);
- __put_user_error(regs->uregs[8], &sf->uc.uc_mcontext.nds32_r8, err);
- __put_user_error(regs->uregs[9], &sf->uc.uc_mcontext.nds32_r9, err);
- __put_user_error(regs->uregs[10], &sf->uc.uc_mcontext.nds32_r10, err);
- __put_user_error(regs->uregs[11], &sf->uc.uc_mcontext.nds32_r11, err);
- __put_user_error(regs->uregs[12], &sf->uc.uc_mcontext.nds32_r12, err);
- __put_user_error(regs->uregs[13], &sf->uc.uc_mcontext.nds32_r13, err);
- __put_user_error(regs->uregs[14], &sf->uc.uc_mcontext.nds32_r14, err);
- __put_user_error(regs->uregs[15], &sf->uc.uc_mcontext.nds32_r15, err);
- __put_user_error(regs->uregs[16], &sf->uc.uc_mcontext.nds32_r16, err);
- __put_user_error(regs->uregs[17], &sf->uc.uc_mcontext.nds32_r17, err);
- __put_user_error(regs->uregs[18], &sf->uc.uc_mcontext.nds32_r18, err);
- __put_user_error(regs->uregs[19], &sf->uc.uc_mcontext.nds32_r19, err);
- __put_user_error(regs->uregs[20], &sf->uc.uc_mcontext.nds32_r20, err);
-
- __put_user_error(regs->uregs[21], &sf->uc.uc_mcontext.nds32_r21, err);
- __put_user_error(regs->uregs[22], &sf->uc.uc_mcontext.nds32_r22, err);
- __put_user_error(regs->uregs[23], &sf->uc.uc_mcontext.nds32_r23, err);
- __put_user_error(regs->uregs[24], &sf->uc.uc_mcontext.nds32_r24, err);
- __put_user_error(regs->uregs[25], &sf->uc.uc_mcontext.nds32_r25, err);
- __put_user_error(regs->fp, &sf->uc.uc_mcontext.nds32_fp, err);
- __put_user_error(regs->gp, &sf->uc.uc_mcontext.nds32_gp, err);
- __put_user_error(regs->lp, &sf->uc.uc_mcontext.nds32_lp, err);
- __put_user_error(regs->sp, &sf->uc.uc_mcontext.nds32_sp, err);
- __put_user_error(regs->ipc, &sf->uc.uc_mcontext.nds32_ipc, err);
-#if defined(CONFIG_HWZOL)
- __put_user_error(regs->lc, &sf->uc.uc_mcontext.zol.nds32_lc, err);
- __put_user_error(regs->le, &sf->uc.uc_mcontext.zol.nds32_le, err);
- __put_user_error(regs->lb, &sf->uc.uc_mcontext.zol.nds32_lb, err);
-#endif
-#if IS_ENABLED(CONFIG_FPU)
- err |= setup_sigcontext_fpu(regs, &sf->uc.uc_mcontext);
-#endif
-
- __put_user_error(current->thread.trap_no, &sf->uc.uc_mcontext.trap_no,
- err);
- __put_user_error(current->thread.error_code,
- &sf->uc.uc_mcontext.error_code, err);
- __put_user_error(current->thread.address,
- &sf->uc.uc_mcontext.fault_address, err);
- __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err);
-
- err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set));
-
- return err;
-}
-
-static inline void __user *get_sigframe(struct ksignal *ksig,
- struct pt_regs *regs, int framesize)
-{
- unsigned long sp;
-
- /* Default to using normal stack */
- sp = regs->sp;
-
- /*
- * If we are on the alternate signal stack and would overflow it, don't.
- * Return an always-bogus address instead so we will die with SIGSEGV.
- */
- if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
- return (void __user __force *)(-1UL);
-
- /* This is the X/Open sanctioned signal stack switching. */
- sp = (sigsp(sp, ksig) - framesize);
-
- /*
- * nds32 mandates 8-byte alignment
- */
- sp &= ~0x7UL;
-
- return (void __user *)sp;
-}
-
-static int
-setup_return(struct pt_regs *regs, struct ksignal *ksig, void __user * frame)
-{
- unsigned long handler = (unsigned long)ksig->ka.sa.sa_handler;
- unsigned long retcode;
-
- retcode = VDSO_SYMBOL(current->mm->context.vdso, rt_sigtramp);
- regs->uregs[0] = ksig->sig;
- regs->sp = (unsigned long)frame;
- regs->lp = retcode;
- regs->ipc = handler;
-
- return 0;
-}
-
-static int
-setup_rt_frame(struct ksignal *ksig, sigset_t * set, struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame =
- get_sigframe(ksig, regs, sizeof(*frame));
- int err = 0;
-
- if (!access_ok(frame, sizeof(*frame)))
- return -EFAULT;
-
- __put_user_error(0, &frame->uc.uc_flags, err);
- __put_user_error(NULL, &frame->uc.uc_link, err);
-
- err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
- err |= setup_sigframe(frame, regs, set);
- if (err == 0) {
- setup_return(regs, ksig, frame);
- if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
- err |= copy_siginfo_to_user(&frame->info, &ksig->info);
- regs->uregs[1] = (unsigned long)&frame->info;
- regs->uregs[2] = (unsigned long)&frame->uc;
- }
- }
- return err;
-}
-
-/*
- * OK, we're invoking a handler
- */
-static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
-{
- int ret;
- sigset_t *oldset = sigmask_to_save();
-
- if (in_syscall(regs)) {
- /* Avoid additional syscall restarting via ret_slow_syscall. */
- forget_syscall(regs);
-
- switch (regs->uregs[0]) {
- case -ERESTART_RESTARTBLOCK:
- case -ERESTARTNOHAND:
- regs->uregs[0] = -EINTR;
- break;
- case -ERESTARTSYS:
- if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {
- regs->uregs[0] = -EINTR;
- break;
- }
- fallthrough;
- case -ERESTARTNOINTR:
- regs->uregs[0] = regs->orig_r0;
- regs->ipc -= 4;
- break;
- }
- }
- /*
- * Set up the stack frame
- */
- ret = setup_rt_frame(ksig, oldset, regs);
-
- signal_setup_done(ret, ksig, 0);
-}
-
-/*
- * Note that 'init' is a special process: it doesn't get signals it doesn't
- * want to handle. Thus you cannot kill init even with a SIGKILL even by
- * mistake.
- *
- * Note that we go through the signals twice: once to check the signals that
- * the kernel can handle, and then we build all the user-level signal handling
- * stack-frames in one go after that.
- */
-static void do_signal(struct pt_regs *regs)
-{
- struct ksignal ksig;
-
- if (get_signal(&ksig)) {
- handle_signal(&ksig, regs);
- return;
- }
-
- /*
- * If we were from a system call, check for system call restarting...
- */
- if (in_syscall(regs)) {
- /* Restart the system call - no handlers present */
-
- /* Avoid additional syscall restarting via ret_slow_syscall. */
- forget_syscall(regs);
-
- switch (regs->uregs[0]) {
- case -ERESTART_RESTARTBLOCK:
- regs->uregs[15] = __NR_restart_syscall;
- fallthrough;
- case -ERESTARTNOHAND:
- case -ERESTARTSYS:
- case -ERESTARTNOINTR:
- regs->uregs[0] = regs->orig_r0;
- regs->ipc -= 0x4;
- break;
- }
- }
- restore_saved_sigmask();
-}
-
-asmlinkage void
-do_notify_resume(struct pt_regs *regs, unsigned int thread_flags)
-{
- if (thread_flags & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL))
- do_signal(regs);
-
- if (thread_flags & _TIF_NOTIFY_RESUME)
- tracehook_notify_resume(regs);
-}
diff --git a/arch/nds32/kernel/sleep.S b/arch/nds32/kernel/sleep.S
deleted file mode 100644
index ca4e61f3656f..000000000000
--- a/arch/nds32/kernel/sleep.S
+++ /dev/null
@@ -1,131 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (C) 2017 Andes Technology Corporation */
-
-#include <asm/memory.h>
-
-.data
-.global sp_tmp
-sp_tmp:
-.long
-
-.text
-.globl suspend2ram
-.globl cpu_resume
-
-suspend2ram:
- pushm $r0, $r31
-#if defined(CONFIG_HWZOL)
- mfusr $r0, $lc
- mfusr $r1, $le
- mfusr $r2, $lb
-#endif
- mfsr $r3, $mr0
- mfsr $r4, $mr1
- mfsr $r5, $mr4
- mfsr $r6, $mr6
- mfsr $r7, $mr7
- mfsr $r8, $mr8
- mfsr $r9, $ir0
- mfsr $r10, $ir1
- mfsr $r11, $ir2
- mfsr $r12, $ir3
- mfsr $r13, $ir9
- mfsr $r14, $ir10
- mfsr $r15, $ir12
- mfsr $r16, $ir13
- mfsr $r17, $ir14
- mfsr $r18, $ir15
- pushm $r0, $r19
-#if defined(CONFIG_FPU)
- jal store_fpu_for_suspend
-#endif
- tlbop FlushAll
- isb
-
- // transfer $sp from va to pa
- sethi $r0, hi20(PAGE_OFFSET)
- ori $r0, $r0, lo12(PAGE_OFFSET)
- movi $r2, PHYS_OFFSET
- sub $r1, $sp, $r0
- add $r2, $r1, $r2
-
- // store pa($sp) to sp_tmp
- sethi $r1, hi20(sp_tmp)
- swi $r2, [$r1 + lo12(sp_tmp)]
-
- pushm $r16, $r25
- pushm $r29, $r30
-#ifdef CONFIG_CACHE_L2
- jal dcache_wb_all_level
-#else
- jal cpu_dcache_wb_all
-#endif
- popm $r29, $r30
- popm $r16, $r25
-
- // get wake_mask and loop in standby
- la $r1, wake_mask
- lwi $r1, [$r1]
-self_loop:
- standby wake_grant
- mfsr $r2, $ir15
- and $r2, $r1, $r2
- beqz $r2, self_loop
-
- // set ipc to resume address
- la $r1, resume_addr
- lwi $r1, [$r1]
- mtsr $r1, $ipc
- isb
-
- // reset psw, turn off the address translation
- li $r2, 0x7000a
- mtsr $r2, $ipsw
- isb
-
- iret
-cpu_resume:
- // translate the address of sp_tmp variable to pa
- la $r1, sp_tmp
- sethi $r0, hi20(PAGE_OFFSET)
- ori $r0, $r0, lo12(PAGE_OFFSET)
- movi $r2, PHYS_OFFSET
- sub $r1, $r1, $r0
- add $r1, $r1, $r2
-
- // access the sp_tmp to get stack pointer
- lwi $sp, [$r1]
-
- popm $r0, $r19
-#if defined(CONFIG_HWZOL)
- mtusr $r0, $lb
- mtusr $r1, $lc
- mtusr $r2, $le
-#endif
- mtsr $r3, $mr0
- mtsr $r4, $mr1
- mtsr $r5, $mr4
- mtsr $r6, $mr6
- mtsr $r7, $mr7
- mtsr $r8, $mr8
- // set original psw to ipsw
- mtsr $r9, $ir1
-
- mtsr $r11, $ir2
- mtsr $r12, $ir3
-
- // set ipc to RR
- la $r13, RR
- mtsr $r13, $ir9
-
- mtsr $r14, $ir10
- mtsr $r15, $ir12
- mtsr $r16, $ir13
- mtsr $r17, $ir14
- mtsr $r18, $ir15
- popm $r0, $r31
-
- isb
- iret
-RR:
- ret
diff --git a/arch/nds32/kernel/stacktrace.c b/arch/nds32/kernel/stacktrace.c
deleted file mode 100644
index d974c0c1c65f..000000000000
--- a/arch/nds32/kernel/stacktrace.c
+++ /dev/null
@@ -1,53 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/sched/debug.h>
-#include <linux/sched/task_stack.h>
-#include <linux/stacktrace.h>
-#include <linux/ftrace.h>
-
-void save_stack_trace(struct stack_trace *trace)
-{
- save_stack_trace_tsk(current, trace);
-}
-EXPORT_SYMBOL_GPL(save_stack_trace);
-
-void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
-{
- unsigned long *fpn;
- int skip = trace->skip;
- int savesched;
- int graph_idx = 0;
-
- if (tsk == current) {
- __asm__ __volatile__("\tori\t%0, $fp, #0\n":"=r"(fpn));
- savesched = 1;
- } else {
- fpn = (unsigned long *)thread_saved_fp(tsk);
- savesched = 0;
- }
-
- while (!kstack_end(fpn) && !((unsigned long)fpn & 0x3)
- && (fpn >= (unsigned long *)TASK_SIZE)) {
- unsigned long lpp, fpp;
-
- lpp = fpn[LP_OFFSET];
- fpp = fpn[FP_OFFSET];
- if (!__kernel_text_address(lpp))
- break;
- else
- lpp = ftrace_graph_ret_addr(tsk, &graph_idx, lpp, NULL);
-
- if (savesched || !in_sched_functions(lpp)) {
- if (skip) {
- skip--;
- } else {
- trace->entries[trace->nr_entries++] = lpp;
- if (trace->nr_entries >= trace->max_entries)
- break;
- }
- }
- fpn = (unsigned long *)fpp;
- }
-}
-EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
diff --git a/arch/nds32/kernel/sys_nds32.c b/arch/nds32/kernel/sys_nds32.c
deleted file mode 100644
index cb2d1e219bb3..000000000000
--- a/arch/nds32/kernel/sys_nds32.c
+++ /dev/null
@@ -1,84 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/syscalls.h>
-#include <linux/uaccess.h>
-
-#include <asm/cachectl.h>
-#include <asm/proc-fns.h>
-#include <asm/fpu.h>
-#include <asm/fp_udfiex_crtl.h>
-
-SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
- unsigned long, prot, unsigned long, flags,
- unsigned long, fd, unsigned long, pgoff)
-{
- if (pgoff & (~PAGE_MASK >> 12))
- return -EINVAL;
-
- return sys_mmap_pgoff(addr, len, prot, flags, fd,
- pgoff >> (PAGE_SHIFT - 12));
-}
-
-SYSCALL_DEFINE4(fadvise64_64_wrapper,int, fd, int, advice, loff_t, offset,
- loff_t, len)
-{
- return sys_fadvise64_64(fd, offset, len, advice);
-}
-
-SYSCALL_DEFINE3(cacheflush, unsigned int, start, unsigned int, end, int, cache)
-{
- struct vm_area_struct *vma;
- bool flushi = true, wbd = true;
-
- vma = find_vma(current->mm, start);
- if (!vma)
- return -EFAULT;
- switch (cache) {
- case ICACHE:
- wbd = false;
- break;
- case DCACHE:
- flushi = false;
- break;
- case BCACHE:
- break;
- default:
- return -EINVAL;
- }
- cpu_cache_wbinval_range_check(vma, start, end, flushi, wbd);
-
- return 0;
-}
-
-SYSCALL_DEFINE2(fp_udfiex_crtl, unsigned int, cmd, unsigned int, act)
-{
-#if IS_ENABLED(CONFIG_SUPPORT_DENORMAL_ARITHMETIC)
- int old_udf_iex;
-
- if (!used_math()) {
- load_fpu(&init_fpuregs);
- current->thread.fpu.UDF_IEX_trap = init_fpuregs.UDF_IEX_trap;
- set_used_math();
- }
-
- old_udf_iex = current->thread.fpu.UDF_IEX_trap;
- act &= (FPCSR_mskUDFE | FPCSR_mskIEXE);
-
- switch (cmd) {
- case DISABLE_UDF_IEX_TRAP:
- current->thread.fpu.UDF_IEX_trap &= ~act;
- break;
- case ENABLE_UDF_IEX_TRAP:
- current->thread.fpu.UDF_IEX_trap |= act;
- break;
- case GET_UDF_IEX_TRAP:
- break;
- default:
- return -EINVAL;
- }
- return old_udf_iex;
-#else
- return -ENOTSUPP;
-#endif
-}
diff --git a/arch/nds32/kernel/syscall_table.c b/arch/nds32/kernel/syscall_table.c
deleted file mode 100644
index 7879c061b87f..000000000000
--- a/arch/nds32/kernel/syscall_table.c
+++ /dev/null
@@ -1,17 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/syscalls.h>
-#include <linux/signal.h>
-#include <linux/unistd.h>
-#include <asm/syscalls.h>
-
-#undef __SYSCALL
-#define __SYSCALL(nr, call) [nr] = (call),
-
-#define sys_rt_sigreturn sys_rt_sigreturn_wrapper
-#define sys_fadvise64_64 sys_fadvise64_64_wrapper
-void *sys_call_table[__NR_syscalls] __aligned(8192) = {
- [0 ... __NR_syscalls - 1] = sys_ni_syscall,
-#include <asm/unistd.h>
-};
diff --git a/arch/nds32/kernel/time.c b/arch/nds32/kernel/time.c
deleted file mode 100644
index 574a3d0a8539..000000000000
--- a/arch/nds32/kernel/time.c
+++ /dev/null
@@ -1,11 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/clocksource.h>
-#include <linux/of_clk.h>
-
-void __init time_init(void)
-{
- of_clk_init(NULL);
- timer_probe();
-}
diff --git a/arch/nds32/kernel/traps.c b/arch/nds32/kernel/traps.c
deleted file mode 100644
index c0a8f3344fb9..000000000000
--- a/arch/nds32/kernel/traps.c
+++ /dev/null
@@ -1,354 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/module.h>
-#include <linux/personality.h>
-#include <linux/kallsyms.h>
-#include <linux/hardirq.h>
-#include <linux/kdebug.h>
-#include <linux/sched/task_stack.h>
-#include <linux/uaccess.h>
-#include <linux/ftrace.h>
-
-#include <asm/proc-fns.h>
-#include <asm/unistd.h>
-#include <asm/fpu.h>
-
-#include <linux/ptrace.h>
-#include <nds32_intrinsic.h>
-
-extern void show_pte(struct mm_struct *mm, unsigned long addr);
-
-/*
- * Dump out the contents of some memory nicely...
- */
-void dump_mem(const char *lvl, unsigned long bottom, unsigned long top)
-{
- unsigned long first;
- int i;
-
- pr_emerg("%s(0x%08lx to 0x%08lx)\n", lvl, bottom, top);
-
- for (first = bottom & ~31; first < top; first += 32) {
- unsigned long p;
- char str[sizeof(" 12345678") * 8 + 1];
-
- memset(str, ' ', sizeof(str));
- str[sizeof(str) - 1] = '\0';
-
- for (p = first, i = 0; i < 8 && p < top; i++, p += 4) {
- if (p >= bottom && p < top) {
- unsigned long val;
-
- if (get_kernel_nofault(val,
- (unsigned long *)p) == 0)
- sprintf(str + i * 9, " %08lx", val);
- else
- sprintf(str + i * 9, " ????????");
- }
- }
- pr_emerg("%s%04lx:%s\n", lvl, first & 0xffff, str);
- }
-}
-
-EXPORT_SYMBOL(dump_mem);
-
-#define LOOP_TIMES (100)
-static void __dump(struct task_struct *tsk, unsigned long *base_reg,
- const char *loglvl)
-{
- unsigned long ret_addr;
- int cnt = LOOP_TIMES, graph = 0;
- printk("%sCall Trace:\n", loglvl);
- if (!IS_ENABLED(CONFIG_FRAME_POINTER)) {
- while (!kstack_end(base_reg)) {
- ret_addr = *base_reg++;
- if (__kernel_text_address(ret_addr)) {
- ret_addr = ftrace_graph_ret_addr(
- tsk, &graph, ret_addr, NULL);
- print_ip_sym(loglvl, ret_addr);
- }
- if (--cnt < 0)
- break;
- }
- } else {
- while (!kstack_end((void *)base_reg) &&
- !((unsigned long)base_reg & 0x3) &&
- ((unsigned long)base_reg >= TASK_SIZE)) {
- unsigned long next_fp;
- ret_addr = base_reg[LP_OFFSET];
- next_fp = base_reg[FP_OFFSET];
- if (__kernel_text_address(ret_addr)) {
-
- ret_addr = ftrace_graph_ret_addr(
- tsk, &graph, ret_addr, NULL);
- print_ip_sym(loglvl, ret_addr);
- }
- if (--cnt < 0)
- break;
- base_reg = (unsigned long *)next_fp;
- }
- }
- printk("%s\n", loglvl);
-}
-
-void show_stack(struct task_struct *tsk, unsigned long *sp, const char *loglvl)
-{
- unsigned long *base_reg;
-
- if (!tsk)
- tsk = current;
- if (!IS_ENABLED(CONFIG_FRAME_POINTER)) {
- if (tsk != current)
- base_reg = (unsigned long *)(tsk->thread.cpu_context.sp);
- else
- __asm__ __volatile__("\tori\t%0, $sp, #0\n":"=r"(base_reg));
- } else {
- if (tsk != current)
- base_reg = (unsigned long *)(tsk->thread.cpu_context.fp);
- else
- __asm__ __volatile__("\tori\t%0, $fp, #0\n":"=r"(base_reg));
- }
- __dump(tsk, base_reg, loglvl);
- barrier();
-}
-
-DEFINE_SPINLOCK(die_lock);
-
-/*
- * This function is protected against re-entrancy.
- */
-void __noreturn die(const char *str, struct pt_regs *regs, int err)
-{
- struct task_struct *tsk = current;
- static int die_counter;
-
- console_verbose();
- spin_lock_irq(&die_lock);
- bust_spinlocks(1);
-
- pr_emerg("Internal error: %s: %x [#%d]\n", str, err, ++die_counter);
- print_modules();
- pr_emerg("CPU: %i\n", smp_processor_id());
- show_regs(regs);
- pr_emerg("Process %s (pid: %d, stack limit = 0x%p)\n",
- tsk->comm, tsk->pid, end_of_stack(tsk));
-
- if (!user_mode(regs) || in_interrupt()) {
- dump_mem("Stack: ", regs->sp, (regs->sp + PAGE_SIZE) & PAGE_MASK);
- dump_stack();
- }
-
- bust_spinlocks(0);
- spin_unlock_irq(&die_lock);
- make_task_dead(SIGSEGV);
-}
-
-EXPORT_SYMBOL(die);
-
-void die_if_kernel(const char *str, struct pt_regs *regs, int err)
-{
- if (user_mode(regs))
- return;
-
- die(str, regs, err);
-}
-
-int bad_syscall(int n, struct pt_regs *regs)
-{
- if (current->personality != PER_LINUX) {
- send_sig(SIGSEGV, current, 1);
- return regs->uregs[0];
- }
-
- force_sig_fault(SIGILL, ILL_ILLTRP,
- (void __user *)instruction_pointer(regs) - 4);
- die_if_kernel("Oops - bad syscall", regs, n);
- return regs->uregs[0];
-}
-
-void __pte_error(const char *file, int line, unsigned long val)
-{
- pr_emerg("%s:%d: bad pte %08lx.\n", file, line, val);
-}
-
-void __pmd_error(const char *file, int line, unsigned long val)
-{
- pr_emerg("%s:%d: bad pmd %08lx.\n", file, line, val);
-}
-
-void __pgd_error(const char *file, int line, unsigned long val)
-{
- pr_emerg("%s:%d: bad pgd %08lx.\n", file, line, val);
-}
-
-extern char *exception_vector, *exception_vector_end;
-void __init early_trap_init(void)
-{
- unsigned long ivb = 0;
- unsigned long base = PAGE_OFFSET;
-
- memcpy((unsigned long *)base, (unsigned long *)&exception_vector,
- ((unsigned long)&exception_vector_end -
- (unsigned long)&exception_vector));
- ivb = __nds32__mfsr(NDS32_SR_IVB);
- /* Check platform support. */
- if (((ivb & IVB_mskNIVIC) >> IVB_offNIVIC) < 2)
- panic
- ("IVIC mode is not allowed on the platform with interrupt controller\n");
- __nds32__mtsr((ivb & ~IVB_mskESZ) | (IVB_valESZ16 << IVB_offESZ) |
- IVB_BASE, NDS32_SR_IVB);
- __nds32__mtsr(INT_MASK_INITAIAL_VAL, NDS32_SR_INT_MASK);
-
- /*
- * 0x800 = 128 vectors * 16byte.
- * It should be enough to flush a page.
- */
- cpu_cache_wbinval_page(base, true);
-}
-
-static void send_sigtrap(struct pt_regs *regs, int error_code, int si_code)
-{
- struct task_struct *tsk = current;
-
- tsk->thread.trap_no = ENTRY_DEBUG_RELATED;
- tsk->thread.error_code = error_code;
-
- force_sig_fault(SIGTRAP, si_code,
- (void __user *)instruction_pointer(regs));
-}
-
-void do_debug_trap(unsigned long entry, unsigned long addr,
- unsigned long type, struct pt_regs *regs)
-{
- if (notify_die(DIE_OOPS, "Oops", regs, addr, type, SIGTRAP)
- == NOTIFY_STOP)
- return;
-
- if (user_mode(regs)) {
- /* trap_signal */
- send_sigtrap(regs, 0, TRAP_BRKPT);
- } else {
- /* kernel_trap */
- if (!fixup_exception(regs))
- die("unexpected kernel_trap", regs, 0);
- }
-}
-
-void unhandled_interruption(struct pt_regs *regs)
-{
- pr_emerg("unhandled_interruption\n");
- show_regs(regs);
- if (!user_mode(regs))
- make_task_dead(SIGKILL);
- force_sig(SIGKILL);
-}
-
-void unhandled_exceptions(unsigned long entry, unsigned long addr,
- unsigned long type, struct pt_regs *regs)
-{
- pr_emerg("Unhandled Exception: entry: %lx addr:%lx itype:%lx\n", entry,
- addr, type);
- show_regs(regs);
- if (!user_mode(regs))
- make_task_dead(SIGKILL);
- force_sig(SIGKILL);
-}
-
-extern int do_page_fault(unsigned long entry, unsigned long addr,
- unsigned int error_code, struct pt_regs *regs);
-
-/*
- * 2:DEF dispatch for TLB MISC exception handler
-*/
-
-void do_dispatch_tlb_misc(unsigned long entry, unsigned long addr,
- unsigned long type, struct pt_regs *regs)
-{
- type = type & (ITYPE_mskINST | ITYPE_mskETYPE);
- if ((type & ITYPE_mskETYPE) < 5) {
- /* Permission exceptions */
- do_page_fault(entry, addr, type, regs);
- } else
- unhandled_exceptions(entry, addr, type, regs);
-}
-
-void do_revinsn(struct pt_regs *regs)
-{
- pr_emerg("Reserved Instruction\n");
- show_regs(regs);
- if (!user_mode(regs))
- make_task_dead(SIGILL);
- force_sig(SIGILL);
-}
-
-#ifdef CONFIG_ALIGNMENT_TRAP
-extern int unalign_access_mode;
-extern int do_unaligned_access(unsigned long addr, struct pt_regs *regs);
-#endif
-void do_dispatch_general(unsigned long entry, unsigned long addr,
- unsigned long itype, struct pt_regs *regs,
- unsigned long oipc)
-{
- unsigned int swid = itype >> ITYPE_offSWID;
- unsigned long type = itype & (ITYPE_mskINST | ITYPE_mskETYPE);
- if (type == ETYPE_ALIGNMENT_CHECK) {
-#ifdef CONFIG_ALIGNMENT_TRAP
- /* Alignment check */
- if (user_mode(regs) && unalign_access_mode) {
- int ret;
- ret = do_unaligned_access(addr, regs);
-
- if (ret == 0)
- return;
-
- if (ret == -EFAULT)
- pr_emerg
- ("Unhandled unaligned access exception\n");
- }
-#endif
- do_page_fault(entry, addr, type, regs);
- } else if (type == ETYPE_RESERVED_INSTRUCTION) {
- /* Reserved instruction */
- do_revinsn(regs);
- } else if (type == ETYPE_COPROCESSOR) {
- /* Coprocessor */
-#if IS_ENABLED(CONFIG_FPU)
- unsigned int fucop_exist = __nds32__mfsr(NDS32_SR_FUCOP_EXIST);
- unsigned int cpid = ((itype & ITYPE_mskCPID) >> ITYPE_offCPID);
-
- if ((cpid == FPU_CPID) &&
- (fucop_exist & FUCOP_EXIST_mskCP0ISFPU)) {
- unsigned int subtype = (itype & ITYPE_mskSTYPE);
-
- if (true == do_fpu_exception(subtype, regs))
- return;
- }
-#endif
- unhandled_exceptions(entry, addr, type, regs);
- } else if (type == ETYPE_TRAP && swid == SWID_RAISE_INTERRUPT_LEVEL) {
- /* trap, used on v3 EDM target debugging workaround */
- /*
- * DIPC(OIPC) is passed as parameter before
- * interrupt is enabled, so the DIPC will not be corrupted
- * even though interrupts are coming in
- */
- /*
- * 1. update ipc
- * 2. update pt_regs ipc with oipc
- * 3. update pt_regs ipsw (clear DEX)
- */
- __asm__ volatile ("mtsr %0, $IPC\n\t"::"r" (oipc));
- regs->ipc = oipc;
- if (regs->pipsw & PSW_mskDEX) {
- pr_emerg
- ("Nested Debug exception is possibly happened\n");
- pr_emerg("ipc:%08x pipc:%08x\n",
- (unsigned int)regs->ipc,
- (unsigned int)regs->pipc);
- }
- do_debug_trap(entry, addr, itype, regs);
- regs->ipsw &= ~PSW_mskDEX;
- } else
- unhandled_exceptions(entry, addr, type, regs);
-}
diff --git a/arch/nds32/kernel/vdso.c b/arch/nds32/kernel/vdso.c
deleted file mode 100644
index e16009a07971..000000000000
--- a/arch/nds32/kernel/vdso.c
+++ /dev/null
@@ -1,231 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2012 ARM Limited
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/cache.h>
-#include <linux/clocksource.h>
-#include <linux/elf.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/gfp.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/slab.h>
-#include <linux/timekeeper_internal.h>
-#include <linux/vmalloc.h>
-#include <linux/random.h>
-
-#include <asm/cacheflush.h>
-#include <asm/vdso.h>
-#include <asm/vdso_datapage.h>
-#include <asm/vdso_timer_info.h>
-#include <asm/cache_info.h>
-extern struct cache_info L1_cache_info[2];
-extern char vdso_start[], vdso_end[];
-static unsigned long vdso_pages __ro_after_init;
-static unsigned long timer_mapping_base;
-
-struct timer_info_t timer_info = {
- .cycle_count_down = true,
- .mapping_base = EMPTY_TIMER_MAPPING,
- .cycle_count_reg_offset = EMPTY_REG_OFFSET
-};
-/*
- * The vDSO data page.
- */
-static struct page *no_pages[] = { NULL };
-
-static union {
- struct vdso_data data;
- u8 page[PAGE_SIZE];
-} vdso_data_store __page_aligned_data;
-struct vdso_data *vdso_data = &vdso_data_store.data;
-static struct vm_special_mapping vdso_spec[2] __ro_after_init = {
- {
- .name = "[vvar]",
- .pages = no_pages,
- },
- {
- .name = "[vdso]",
- },
-};
-
-static void get_timer_node_info(void)
-{
- timer_mapping_base = timer_info.mapping_base;
- vdso_data->cycle_count_offset =
- timer_info.cycle_count_reg_offset;
- vdso_data->cycle_count_down =
- timer_info.cycle_count_down;
-}
-
-static int __init vdso_init(void)
-{
- int i;
- struct page **vdso_pagelist;
-
- if (memcmp(vdso_start, "\177ELF", 4)) {
- pr_err("vDSO is not a valid ELF object!\n");
- return -EINVAL;
- }
- /* Creat a timer io mapping to get clock cycles counter */
- get_timer_node_info();
-
- vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;
- pr_info("vdso: %ld pages (%ld code @ %p, %ld data @ %p)\n",
- vdso_pages + 1, vdso_pages, vdso_start, 1L, vdso_data);
-
- /* Allocate the vDSO pagelist */
- vdso_pagelist = kcalloc(vdso_pages, sizeof(struct page *), GFP_KERNEL);
- if (vdso_pagelist == NULL)
- return -ENOMEM;
-
- for (i = 0; i < vdso_pages; i++)
- vdso_pagelist[i] = virt_to_page(vdso_start + i * PAGE_SIZE);
- vdso_spec[1].pages = &vdso_pagelist[0];
-
- return 0;
-}
-
-arch_initcall(vdso_init);
-
-unsigned long inline vdso_random_addr(unsigned long vdso_mapping_len)
-{
- unsigned long start = current->mm->mmap_base, end, offset, addr;
- start = PAGE_ALIGN(start);
-
- /* Round the lowest possible end address up to a PMD boundary. */
- end = (start + vdso_mapping_len + PMD_SIZE - 1) & PMD_MASK;
- if (end >= TASK_SIZE)
- end = TASK_SIZE;
- end -= vdso_mapping_len;
-
- if (end > start) {
- offset = get_random_int() % (((end - start) >> PAGE_SHIFT) + 1);
- addr = start + (offset << PAGE_SHIFT);
- } else {
- addr = start;
- }
- return addr;
-}
-
-int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
-{
- struct mm_struct *mm = current->mm;
- unsigned long vdso_base, vdso_text_len, vdso_mapping_len;
- struct vm_area_struct *vma;
- unsigned long addr = 0;
- pgprot_t prot;
- int ret, vvar_page_num = 2;
-
- vdso_text_len = vdso_pages << PAGE_SHIFT;
-
- if(timer_mapping_base == EMPTY_VALUE)
- vvar_page_num = 1;
- /* Be sure to map the data page */
- vdso_mapping_len = vdso_text_len + vvar_page_num * PAGE_SIZE;
-#ifdef CONFIG_CPU_CACHE_ALIASING
- vdso_mapping_len += L1_cache_info[DCACHE].aliasing_num - 1;
-#endif
-
- if (mmap_write_lock_killable(mm))
- return -EINTR;
-
- addr = vdso_random_addr(vdso_mapping_len);
- vdso_base = get_unmapped_area(NULL, addr, vdso_mapping_len, 0, 0);
- if (IS_ERR_VALUE(vdso_base)) {
- ret = vdso_base;
- goto up_fail;
- }
-
-#ifdef CONFIG_CPU_CACHE_ALIASING
- {
- unsigned int aliasing_mask =
- L1_cache_info[DCACHE].aliasing_mask;
- unsigned int page_colour_ofs;
- page_colour_ofs = ((unsigned int)vdso_data & aliasing_mask) -
- (vdso_base & aliasing_mask);
- vdso_base += page_colour_ofs & aliasing_mask;
- }
-#endif
-
- vma = _install_special_mapping(mm, vdso_base, vvar_page_num * PAGE_SIZE,
- VM_READ | VM_MAYREAD, &vdso_spec[0]);
- if (IS_ERR(vma)) {
- ret = PTR_ERR(vma);
- goto up_fail;
- }
-
- /*Map vdata to user space */
- ret = io_remap_pfn_range(vma, vdso_base,
- virt_to_phys(vdso_data) >> PAGE_SHIFT,
- PAGE_SIZE, vma->vm_page_prot);
- if (ret)
- goto up_fail;
-
- /*Map timer to user space */
- vdso_base += PAGE_SIZE;
- prot = __pgprot(_PAGE_V | _PAGE_M_UR_KR | _PAGE_D | _PAGE_C_DEV);
- ret = io_remap_pfn_range(vma, vdso_base, timer_mapping_base >> PAGE_SHIFT,
- PAGE_SIZE, prot);
- if (ret)
- goto up_fail;
-
- /*Map vdso to user space */
- vdso_base += PAGE_SIZE;
- mm->context.vdso = (void *)vdso_base;
- vma = _install_special_mapping(mm, vdso_base, vdso_text_len,
- VM_READ | VM_EXEC |
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC,
- &vdso_spec[1]);
- if (IS_ERR(vma)) {
- ret = PTR_ERR(vma);
- goto up_fail;
- }
-
- mmap_write_unlock(mm);
- return 0;
-
-up_fail:
- mm->context.vdso = NULL;
- mmap_write_unlock(mm);
- return ret;
-}
-
-static void vdso_write_begin(struct vdso_data *vdata)
-{
- ++vdso_data->seq_count;
- smp_wmb(); /* Pairs with smp_rmb in vdso_read_retry */
-}
-
-static void vdso_write_end(struct vdso_data *vdata)
-{
- smp_wmb(); /* Pairs with smp_rmb in vdso_read_begin */
- ++vdso_data->seq_count;
-}
-
-void update_vsyscall(struct timekeeper *tk)
-{
- vdso_write_begin(vdso_data);
- vdso_data->cs_mask = tk->tkr_mono.mask;
- vdso_data->cs_mult = tk->tkr_mono.mult;
- vdso_data->cs_shift = tk->tkr_mono.shift;
- vdso_data->cs_cycle_last = tk->tkr_mono.cycle_last;
- vdso_data->wtm_clock_sec = tk->wall_to_monotonic.tv_sec;
- vdso_data->wtm_clock_nsec = tk->wall_to_monotonic.tv_nsec;
- vdso_data->xtime_clock_sec = tk->xtime_sec;
- vdso_data->xtime_clock_nsec = tk->tkr_mono.xtime_nsec;
- vdso_data->xtime_coarse_sec = tk->xtime_sec;
- vdso_data->xtime_coarse_nsec = tk->tkr_mono.xtime_nsec >>
- tk->tkr_mono.shift;
- vdso_data->hrtimer_res = hrtimer_resolution;
- vdso_write_end(vdso_data);
-}
-
-void update_vsyscall_tz(void)
-{
- vdso_data->tz_minuteswest = sys_tz.tz_minuteswest;
- vdso_data->tz_dsttime = sys_tz.tz_dsttime;
-}
diff --git a/arch/nds32/kernel/vdso/.gitignore b/arch/nds32/kernel/vdso/.gitignore
deleted file mode 100644
index 652e31d82582..000000000000
--- a/arch/nds32/kernel/vdso/.gitignore
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-vdso.lds
diff --git a/arch/nds32/kernel/vdso/Makefile b/arch/nds32/kernel/vdso/Makefile
deleted file mode 100644
index 55df25ef0057..000000000000
--- a/arch/nds32/kernel/vdso/Makefile
+++ /dev/null
@@ -1,79 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Building a vDSO image for AArch64.
-#
-# Author: Will Deacon <will.deacon@arm.com>
-# Heavily based on the vDSO Makefiles for other archs.
-#
-
-obj-vdso := note.o datapage.o sigreturn.o gettimeofday.o
-
-# Build rules
-targets := $(obj-vdso) vdso.so vdso.so.dbg
-obj-vdso := $(addprefix $(obj)/, $(obj-vdso))
-
-ccflags-y := -shared -fno-common -fno-builtin -nostdlib -fPIC -Wl,-shared -g \
- -Wl,-soname=linux-vdso.so.1 -Wl,--hash-style=sysv
-
-# Disable gcov profiling for VDSO code
-GCOV_PROFILE := n
-
-
-obj-y += vdso.o
-targets += vdso.lds
-CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
-
-# Force dependency
-$(obj)/vdso.o : $(obj)/vdso.so
-
-# Link rule for the .so file, .lds has to be first
-$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
- $(call if_changed,vdsold)
-
-
-# Strip rule for the .so file
-$(obj)/%.so: OBJCOPYFLAGS := -S
-$(obj)/%.so: $(obj)/%.so.dbg FORCE
- $(call if_changed,objcopy)
-
-# Generate VDSO offsets using helper script
-gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
-quiet_cmd_vdsosym = VDSOSYM $@
- cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
-
-include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
- $(call if_changed,vdsosym)
-
-
-
-# Assembly rules for the .S files
-
-sigreturn.o : sigreturn.S
- $(call if_changed_dep,vdsoas)
-
-note.o : note.S
- $(call if_changed_dep,vdsoas)
-
-datapage.o : datapage.S
- $(call if_changed_dep,vdsoas)
-
-gettimeofday.o : gettimeofday.c FORCE
- $(call if_changed_dep,vdsocc)
-
-# Actual build commands
-quiet_cmd_vdsold = VDSOL $@
- cmd_vdsold = $(CC) $(c_flags) -Wl,-n -Wl,-T $(real-prereqs) -o $@
-quiet_cmd_vdsoas = VDSOA $@
- cmd_vdsoas = $(CC) $(a_flags) -c -o $@ $<
-quiet_cmd_vdsocc = VDSOA $@
- cmd_vdsocc = $(CC) $(c_flags) -c -o $@ $<
-
-# Install commands for the unstripped file
-quiet_cmd_vdso_install = INSTALL $@
- cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
-
-vdso.so: $(obj)/vdso.so.dbg
- @mkdir -p $(MODLIB)/vdso
- $(call cmd,vdso_install)
-
-vdso_install: vdso.so
diff --git a/arch/nds32/kernel/vdso/datapage.S b/arch/nds32/kernel/vdso/datapage.S
deleted file mode 100644
index 4a62c3cab1c8..000000000000
--- a/arch/nds32/kernel/vdso/datapage.S
+++ /dev/null
@@ -1,21 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/linkage.h>
-#include <asm/page.h>
-
-ENTRY(__get_timerpage)
- sethi $r0, hi20(. + PAGE_SIZE + 8)
- ori $r0, $r0, lo12(. + PAGE_SIZE + 4)
- mfusr $r1, $pc
- sub $r0, $r1, $r0
- ret
-ENDPROC(__get_timerpage)
-
-ENTRY(__get_datapage)
- sethi $r0, hi20(. + 2*PAGE_SIZE + 8)
- ori $r0, $r0, lo12(. + 2*PAGE_SIZE + 4)
- mfusr $r1, $pc
- sub $r0, $r1, $r0
- ret
-ENDPROC(__get_datapage)
diff --git a/arch/nds32/kernel/vdso/gen_vdso_offsets.sh b/arch/nds32/kernel/vdso/gen_vdso_offsets.sh
deleted file mode 100755
index 01924ff071ad..000000000000
--- a/arch/nds32/kernel/vdso/gen_vdso_offsets.sh
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/bin/sh
-
-#
-# Match symbols in the DSO that look like VDSO_*; produce a header file
-# of constant offsets into the shared object.
-#
-# Doing this inside the Makefile will break the $(filter-out) function,
-# causing Kbuild to rebuild the vdso-offsets header file every time.
-#
-# Author: Will Deacon <will.deacon@arm.com
-#
-
-LC_ALL=C
-sed -n -e 's/^00*/0/' -e \
-'s/^\([0-9a-fA-F]*\) . VDSO_\([a-zA-Z0-9_]*\)$/\#define vdso_offset_\2\t0x\1/p'
diff --git a/arch/nds32/kernel/vdso/gettimeofday.c b/arch/nds32/kernel/vdso/gettimeofday.c
deleted file mode 100644
index 9ec03cf0ec54..000000000000
--- a/arch/nds32/kernel/vdso/gettimeofday.c
+++ /dev/null
@@ -1,269 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/compiler.h>
-#include <linux/hrtimer.h>
-#include <linux/time.h>
-#include <asm/io.h>
-#include <asm/barrier.h>
-#include <asm/bug.h>
-#include <asm/page.h>
-#include <asm/unistd.h>
-#include <asm/vdso_datapage.h>
-#include <asm/vdso_timer_info.h>
-#include <asm/asm-offsets.h>
-
-#define X(x) #x
-#define Y(x) X(x)
-
-extern struct vdso_data *__get_datapage(void);
-extern struct vdso_data *__get_timerpage(void);
-
-static notrace unsigned int __vdso_read_begin(const struct vdso_data *vdata)
-{
- u32 seq;
-repeat:
- seq = READ_ONCE(vdata->seq_count);
- if (seq & 1) {
- cpu_relax();
- goto repeat;
- }
- return seq;
-}
-
-static notrace unsigned int vdso_read_begin(const struct vdso_data *vdata)
-{
- unsigned int seq;
-
- seq = __vdso_read_begin(vdata);
-
- smp_rmb(); /* Pairs with smp_wmb in vdso_write_end */
- return seq;
-}
-
-static notrace int vdso_read_retry(const struct vdso_data *vdata, u32 start)
-{
- smp_rmb(); /* Pairs with smp_wmb in vdso_write_begin */
- return vdata->seq_count != start;
-}
-
-static notrace long clock_gettime_fallback(clockid_t _clkid,
- struct __kernel_old_timespec *_ts)
-{
- register struct __kernel_old_timespec *ts asm("$r1") = _ts;
- register clockid_t clkid asm("$r0") = _clkid;
- register long ret asm("$r0");
-
- asm volatile ("movi $r15, %3\n"
- "syscall 0x0\n"
- :"=r" (ret)
- :"r"(clkid), "r"(ts), "i"(__NR_clock_gettime)
- :"$r15", "memory");
-
- return ret;
-}
-
-static notrace int do_realtime_coarse(struct __kernel_old_timespec *ts,
- struct vdso_data *vdata)
-{
- u32 seq;
-
- do {
- seq = vdso_read_begin(vdata);
-
- ts->tv_sec = vdata->xtime_coarse_sec;
- ts->tv_nsec = vdata->xtime_coarse_nsec;
-
- } while (vdso_read_retry(vdata, seq));
- return 0;
-}
-
-static notrace int do_monotonic_coarse(struct __kernel_old_timespec *ts,
- struct vdso_data *vdata)
-{
- u32 seq;
- u64 ns;
-
- do {
- seq = vdso_read_begin(vdata);
-
- ts->tv_sec = vdata->xtime_coarse_sec + vdata->wtm_clock_sec;
- ns = vdata->xtime_coarse_nsec + vdata->wtm_clock_nsec;
-
- } while (vdso_read_retry(vdata, seq));
-
- ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns);
- ts->tv_nsec = ns;
-
- return 0;
-}
-
-static notrace inline u64 vgetsns(struct vdso_data *vdso)
-{
- u32 cycle_now;
- u32 cycle_delta;
- u32 *timer_cycle_base;
-
- timer_cycle_base =
- (u32 *) ((char *)__get_timerpage() + vdso->cycle_count_offset);
- cycle_now = readl_relaxed(timer_cycle_base);
- if (true == vdso->cycle_count_down)
- cycle_now = ~(*timer_cycle_base);
- cycle_delta = cycle_now - (u32) vdso->cs_cycle_last;
- return ((u64) cycle_delta & vdso->cs_mask) * vdso->cs_mult;
-}
-
-static notrace int do_realtime(struct __kernel_old_timespec *ts, struct vdso_data *vdata)
-{
- unsigned count;
- u64 ns;
- do {
- count = vdso_read_begin(vdata);
- ts->tv_sec = vdata->xtime_clock_sec;
- ns = vdata->xtime_clock_nsec;
- ns += vgetsns(vdata);
- ns >>= vdata->cs_shift;
- } while (vdso_read_retry(vdata, count));
-
- ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns);
- ts->tv_nsec = ns;
-
- return 0;
-}
-
-static notrace int do_monotonic(struct __kernel_old_timespec *ts, struct vdso_data *vdata)
-{
- u64 ns;
- u32 seq;
-
- do {
- seq = vdso_read_begin(vdata);
-
- ts->tv_sec = vdata->xtime_clock_sec;
- ns = vdata->xtime_clock_nsec;
- ns += vgetsns(vdata);
- ns >>= vdata->cs_shift;
-
- ts->tv_sec += vdata->wtm_clock_sec;
- ns += vdata->wtm_clock_nsec;
-
- } while (vdso_read_retry(vdata, seq));
-
- ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns);
- ts->tv_nsec = ns;
-
- return 0;
-}
-
-notrace int __vdso_clock_gettime(clockid_t clkid, struct __kernel_old_timespec *ts)
-{
- struct vdso_data *vdata;
- int ret = -1;
-
- vdata = __get_datapage();
- if (vdata->cycle_count_offset == EMPTY_REG_OFFSET)
- return clock_gettime_fallback(clkid, ts);
-
- switch (clkid) {
- case CLOCK_REALTIME_COARSE:
- ret = do_realtime_coarse(ts, vdata);
- break;
- case CLOCK_MONOTONIC_COARSE:
- ret = do_monotonic_coarse(ts, vdata);
- break;
- case CLOCK_REALTIME:
- ret = do_realtime(ts, vdata);
- break;
- case CLOCK_MONOTONIC:
- ret = do_monotonic(ts, vdata);
- break;
- default:
- break;
- }
-
- if (ret)
- ret = clock_gettime_fallback(clkid, ts);
-
- return ret;
-}
-
-static notrace int clock_getres_fallback(clockid_t _clk_id,
- struct __kernel_old_timespec *_res)
-{
- register clockid_t clk_id asm("$r0") = _clk_id;
- register struct __kernel_old_timespec *res asm("$r1") = _res;
- register int ret asm("$r0");
-
- asm volatile ("movi $r15, %3\n"
- "syscall 0x0\n"
- :"=r" (ret)
- :"r"(clk_id), "r"(res), "i"(__NR_clock_getres)
- :"$r15", "memory");
-
- return ret;
-}
-
-notrace int __vdso_clock_getres(clockid_t clk_id, struct __kernel_old_timespec *res)
-{
- struct vdso_data *vdata = __get_datapage();
-
- if (res == NULL)
- return 0;
- switch (clk_id) {
- case CLOCK_REALTIME:
- case CLOCK_MONOTONIC:
- case CLOCK_MONOTONIC_RAW:
- res->tv_sec = 0;
- res->tv_nsec = vdata->hrtimer_res;
- break;
- case CLOCK_REALTIME_COARSE:
- case CLOCK_MONOTONIC_COARSE:
- res->tv_sec = 0;
- res->tv_nsec = CLOCK_COARSE_RES;
- break;
- default:
- return clock_getres_fallback(clk_id, res);
- }
- return 0;
-}
-
-static notrace inline int gettimeofday_fallback(struct __kernel_old_timeval *_tv,
- struct timezone *_tz)
-{
- register struct __kernel_old_timeval *tv asm("$r0") = _tv;
- register struct timezone *tz asm("$r1") = _tz;
- register int ret asm("$r0");
-
- asm volatile ("movi $r15, %3\n"
- "syscall 0x0\n"
- :"=r" (ret)
- :"r"(tv), "r"(tz), "i"(__NR_gettimeofday)
- :"$r15", "memory");
-
- return ret;
-}
-
-notrace int __vdso_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz)
-{
- struct __kernel_old_timespec ts;
- struct vdso_data *vdata;
- int ret;
-
- vdata = __get_datapage();
-
- if (vdata->cycle_count_offset == EMPTY_REG_OFFSET)
- return gettimeofday_fallback(tv, tz);
-
- ret = do_realtime(&ts, vdata);
-
- if (tv) {
- tv->tv_sec = ts.tv_sec;
- tv->tv_usec = ts.tv_nsec / 1000;
- }
- if (tz) {
- tz->tz_minuteswest = vdata->tz_minuteswest;
- tz->tz_dsttime = vdata->tz_dsttime;
- }
-
- return ret;
-}
diff --git a/arch/nds32/kernel/vdso/note.S b/arch/nds32/kernel/vdso/note.S
deleted file mode 100644
index 0aeaa19b05f0..000000000000
--- a/arch/nds32/kernel/vdso/note.S
+++ /dev/null
@@ -1,11 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2012 ARM Limited
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/uts.h>
-#include <linux/version.h>
-#include <linux/elfnote.h>
-
-ELFNOTE_START(Linux, 0, "a")
- .long LINUX_VERSION_CODE
-ELFNOTE_END
diff --git a/arch/nds32/kernel/vdso/sigreturn.S b/arch/nds32/kernel/vdso/sigreturn.S
deleted file mode 100644
index 67e4d1d1612a..000000000000
--- a/arch/nds32/kernel/vdso/sigreturn.S
+++ /dev/null
@@ -1,19 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2012 ARM Limited
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/linkage.h>
-#include <asm/unistd.h>
-
- .text
-
-ENTRY(__kernel_rt_sigreturn)
- .cfi_startproc
- movi $r15, __NR_rt_sigreturn
- /*
- * The SWID of syscall should be __NR_rt_sigreturn to synchronize
- * the unwinding scheme in gcc
- */
- syscall __NR_rt_sigreturn
- .cfi_endproc
-ENDPROC(__kernel_rt_sigreturn)
diff --git a/arch/nds32/kernel/vdso/vdso.S b/arch/nds32/kernel/vdso/vdso.S
deleted file mode 100644
index 16737c11e55b..000000000000
--- a/arch/nds32/kernel/vdso/vdso.S
+++ /dev/null
@@ -1,18 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2012 ARM Limited
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/init.h>
-#include <linux/linkage.h>
-#include <linux/const.h>
-#include <asm/page.h>
-
- .globl vdso_start, vdso_end
- .section .rodata
- .balign PAGE_SIZE
-vdso_start:
- .incbin "arch/nds32/kernel/vdso/vdso.so"
- .balign PAGE_SIZE
-vdso_end:
-
- .previous
diff --git a/arch/nds32/kernel/vdso/vdso.lds.S b/arch/nds32/kernel/vdso/vdso.lds.S
deleted file mode 100644
index 1f2b16004594..000000000000
--- a/arch/nds32/kernel/vdso/vdso.lds.S
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
- * SPDX-License-Identifier: GPL-2.0
- * Copyright (C) 2005-2017 Andes Technology Corporation
- */
-
-
-#include <linux/const.h>
-#include <asm/page.h>
-#include <asm/vdso.h>
-
-OUTPUT_ARCH(nds32)
-
-SECTIONS
-{
- . = SIZEOF_HEADERS;
-
- .hash : { *(.hash) } :text
- .gnu.hash : { *(.gnu.hash) }
- .dynsym : { *(.dynsym) }
- .dynstr : { *(.dynstr) }
- .gnu.version : { *(.gnu.version) }
- .gnu.version_d : { *(.gnu.version_d) }
- .gnu.version_r : { *(.gnu.version_r) }
-
- .note : { *(.note.*) } :text :note
-
-
- .text : { *(.text*) } :text
-
- .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
- .eh_frame : { KEEP (*(.eh_frame)) } :text
-
- .dynamic : { *(.dynamic) } :text :dynamic
-
- .rodata : { *(.rodata*) } :text
-
-
- /DISCARD/ : {
- *(.note.GNU-stack)
- *(.data .data.* .gnu.linkonce.d.* .sdata*)
- *(.bss .sbss .dynbss .dynsbss)
- }
-}
-
-/*
- * We must supply the ELF program headers explicitly to get just one
- * PT_LOAD segment, and set the flags explicitly to make segments read-only.
- */
-PHDRS
-{
- text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */
- dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
- note PT_NOTE FLAGS(4); /* PF_R */
- eh_frame_hdr PT_GNU_EH_FRAME;
-}
-
-/*
- * This controls what symbols we export from the DSO.
- */
-VERSION
-{
- LINUX_4 {
- global:
- __kernel_rt_sigreturn;
- __vdso_gettimeofday;
- __vdso_clock_getres;
- __vdso_clock_gettime;
- local: *;
- };
-}
-
-/*
- * Make the rt_sigreturn code visible to the kernel.
- */
-VDSO_rt_sigtramp = __kernel_rt_sigreturn;
diff --git a/arch/nds32/kernel/vmlinux.lds.S b/arch/nds32/kernel/vmlinux.lds.S
deleted file mode 100644
index 6a91b965fb1e..000000000000
--- a/arch/nds32/kernel/vmlinux.lds.S
+++ /dev/null
@@ -1,70 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <asm/page.h>
-#include <asm/thread_info.h>
-#include <asm/cache.h>
-#include <asm/memory.h>
-
-#define LOAD_OFFSET (PAGE_OFFSET - PHYS_OFFSET)
-#include <asm-generic/vmlinux.lds.h>
-
-OUTPUT_ARCH(nds32)
-ENTRY(_stext_lma)
-jiffies = jiffies_64;
-
-#if defined(CONFIG_GCOV_KERNEL)
-#define NDS32_EXIT_KEEP(x) x
-#else
-#define NDS32_EXIT_KEEP(x)
-#endif
-
-SECTIONS
-{
- _stext_lma = TEXTADDR - LOAD_OFFSET;
- . = TEXTADDR;
- __init_begin = .;
- HEAD_TEXT_SECTION
- .exit.text : {
- NDS32_EXIT_KEEP(EXIT_TEXT)
- }
- INIT_TEXT_SECTION(PAGE_SIZE)
- INIT_DATA_SECTION(16)
- .exit.data : {
- NDS32_EXIT_KEEP(EXIT_DATA)
- }
- PERCPU_SECTION(L1_CACHE_BYTES)
- __init_end = .;
-
- . = ALIGN(PAGE_SIZE);
- _stext = .;
- /* Real text segment */
- .text : AT(ADDR(.text) - LOAD_OFFSET) {
- _text = .; /* Text and read-only data */
- TEXT_TEXT
- SCHED_TEXT
- CPUIDLE_TEXT
- LOCK_TEXT
- KPROBES_TEXT
- IRQENTRY_TEXT
- SOFTIRQENTRY_TEXT
- *(.fixup)
- }
-
- _etext = .; /* End of text and rodata section */
-
- _sdata = .;
- RO_DATA(PAGE_SIZE)
- RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
- _edata = .;
-
- EXCEPTION_TABLE(16)
- BSS_SECTION(4, 4, 4)
- _end = .;
-
- STABS_DEBUG
- DWARF_DEBUG
- ELF_DETAILS
-
- DISCARDS
-}