Merge tag 'xtensa-20190715' of git://github.com/jcmvbkbc/linux-xtensa

Pull Xtensa updates from Max Filippov:

 - clean up PCI support code

 - add defconfig and DTS for the 'virt' board

 - abstract 'entry' and 'retw' uses in xtensa assembly in preparation
   for XEA3/NX pipeline support

 - random small cleanups

* tag 'xtensa-20190715' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: virt: add defconfig and DTS
  xtensa: abstract 'entry' and 'retw' in assembly code
  xtensa: One function call less in bootmem_init()
  xtensa: remove arch/xtensa/include/asm/types.h
  xtensa: use generic pcibios_set_master and pcibios_enable_device
  xtensa: drop dead PCI support code
  xtensa/PCI: Remove unused variable

6 files changed, 17 insertions, 142 deletions

diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S
index 92bf24a9da92..60c220020054 100644
--- a/arch/xtensa/kernel/coprocessor.S
+++ b/arch/xtensa/kernel/coprocessor.S
@@ -121,7 +121,9 @@
 
 ENTRY(coprocessor_flush)
 
-	entry	a1, 32
+	/* reserve 4 bytes on stack to save a0 */
+	abi_entry(4)
+
 	s32i	a0, a1, 0
 	movi	a0, .Lsave_cp_regs_jump_table
 	addx8	a3, a3, a0
@@ -131,7 +133,8 @@ ENTRY(coprocessor_flush)
 	beqz	a3, 1f
 	callx0	a3
 1:	l32i	a0, a1, 0
-	retw
+
+	abi_ret(4)
 
 ENDPROC(coprocessor_flush)
 
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index e54af8b7e0f8..183fa8e0bb5b 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -1842,7 +1842,8 @@ ENDPROC(fast_store_prohibited)
 
 ENTRY(system_call)
 
-	entry	a1, 32
+	/* reserve 4 bytes on stack for function parameter */
+	abi_entry(4)
 
 	/* regs->syscall = regs->areg[2] */
 
@@ -1892,7 +1893,7 @@ ENTRY(system_call)
 
 	s32i	a6, a2, PT_AREG2
 	bnez	a3, 1f
-	retw
+	abi_ret(4)
 
 1:
 	l32i	a4, a1, 4
@@ -1901,7 +1902,7 @@ ENTRY(system_call)
 	mov	a6, a2
 	call4	do_syscall_trace_leave
 	s32i	a3, a2, PT_SYSCALL
-	retw
+	abi_ret(4)
 
 ENDPROC(system_call)
 
@@ -1952,7 +1953,7 @@ ENDPROC(system_call)
 
 ENTRY(_switch_to)
 
-	entry	a1, 48
+	abi_entry(XTENSA_SPILL_STACK_RESERVE)
 
 	mov	a11, a3			# and 'next' (a3)
 
@@ -2013,7 +2014,7 @@ ENTRY(_switch_to)
 	wsr	a14, ps
 	rsync
 
-	retw
+	abi_ret(XTENSA_SPILL_STACK_RESERVE)
 
 ENDPROC(_switch_to)
 
diff --git a/arch/xtensa/kernel/mcount.S b/arch/xtensa/kernel/mcount.S
index 0eeda2e4a25e..5e4619f52858 100644
--- a/arch/xtensa/kernel/mcount.S
+++ b/arch/xtensa/kernel/mcount.S
@@ -11,6 +11,7 @@
  */
 
 #include <linux/linkage.h>
+#include <asm/asmmacro.h>
 #include <asm/ftrace.h>
 
 /*
@@ -21,13 +22,13 @@
 
 ENTRY(_mcount)
 
-	entry	a1, 16
+	abi_entry_default
 
 	movi	a4, ftrace_trace_function
 	l32i	a4, a4, 0
 	movi	a3, ftrace_stub
 	bne	a3, a4, 1f
-	retw
+	abi_ret_default
 
 1: 	xor	a7, a2, a1
 	movi	a3, 0x3fffffff
@@ -40,11 +41,11 @@ ENTRY(_mcount)
 	addi	a6, a6, -MCOUNT_INSN_SIZE
 	callx4	a4
 
-	retw
+	abi_ret_default
 
 ENDPROC(_mcount)
 
 ENTRY(ftrace_stub)
-	entry	a1, 16
-	retw
+	abi_entry_default
+	abi_ret_default
 ENDPROC(ftrace_stub)
diff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c
index 8b823f94e568..3f32e275997a 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -24,23 +24,6 @@
 #include <asm/pci-bridge.h>
 #include <asm/platform.h>
 
-/* PCI Controller */
-
-
-/*
- * pcibios_alloc_controller
- * pcibios_enable_device
- * pcibios_fixups
- * pcibios_align_resource
- * pcibios_fixup_bus
- * pci_bus_add_device
- */
-
-static struct pci_controller *pci_ctrl_head;
-static struct pci_controller **pci_ctrl_tail = &pci_ctrl_head;
-
-static int pci_bus_count;
-
 /*
  * We need to avoid collisions with `mirrored' VGA ports
  * and other strange ISA hardware, so we always want the
@@ -75,81 +58,6 @@ pcibios_align_resource(void *data, const struct resource *res,
 	return start;
 }
 
-static void __init pci_controller_apertures(struct pci_controller *pci_ctrl,
-					    struct list_head *resources)
-{
-	struct resource *res;
-	unsigned long io_offset;
-	int i;
-
-	io_offset = (unsigned long)pci_ctrl->io_space.base;
-	res = &pci_ctrl->io_resource;
-	if (!res->flags) {
-		if (io_offset)
-			pr_err("I/O resource not set for host bridge %d\n",
-			       pci_ctrl->index);
-		res->start = 0;
-		res->end = IO_SPACE_LIMIT;
-		res->flags = IORESOURCE_IO;
-	}
-	res->start += io_offset;
-	res->end += io_offset;
-	pci_add_resource_offset(resources, res, io_offset);
-
-	for (i = 0; i < 3; i++) {
-		res = &pci_ctrl->mem_resources[i];
-		if (!res->flags) {
-			if (i > 0)
-				continue;
-			pr_err("Memory resource not set for host bridge %d\n",
-			       pci_ctrl->index);
-			res->start = 0;
-			res->end = ~0U;
-			res->flags = IORESOURCE_MEM;
-		}
-		pci_add_resource(resources, res);
-	}
-}
-
-static int __init pcibios_init(void)
-{
-	struct pci_controller *pci_ctrl;
-	struct list_head resources;
-	struct pci_bus *bus;
-	int next_busno = 0, ret;
-
-	pr_info("PCI: Probing PCI hardware\n");
-
-	/* Scan all of the recorded PCI controllers.  */
-	for (pci_ctrl = pci_ctrl_head; pci_ctrl; pci_ctrl = pci_ctrl->next) {
-		pci_ctrl->last_busno = 0xff;
-		INIT_LIST_HEAD(&resources);
-		pci_controller_apertures(pci_ctrl, &resources);
-		bus = pci_scan_root_bus(NULL, pci_ctrl->first_busno,
-					pci_ctrl->ops, pci_ctrl, &resources);
-		if (!bus)
-			continue;
-
-		pci_ctrl->bus = bus;
-		pci_ctrl->last_busno = bus->busn_res.end;
-		if (next_busno <= pci_ctrl->last_busno)
-			next_busno = pci_ctrl->last_busno+1;
-	}
-	pci_bus_count = next_busno;
-	ret = platform_pcibios_fixup();
-	if (ret)
-		return ret;
-
-	for (pci_ctrl = pci_ctrl_head; pci_ctrl; pci_ctrl = pci_ctrl->next) {
-		if (pci_ctrl->bus)
-			pci_bus_add_devices(pci_ctrl->bus);
-	}
-
-	return 0;
-}
-
-subsys_initcall(pcibios_init);
-
 void pcibios_fixup_bus(struct pci_bus *bus)
 {
 	if (bus->parent) {
@@ -158,38 +66,6 @@ void pcibios_fixup_bus(struct pci_bus *bus)
 	}
 }
 
-void pcibios_set_master(struct pci_dev *dev)
-{
-	/* No special bus mastering setup handling */
-}
-
-int pcibios_enable_device(struct pci_dev *dev, int mask)
-{
-	u16 cmd, old_cmd;
-	int idx;
-	struct resource *r;
-
-	pci_read_config_word(dev, PCI_COMMAND, &cmd);
-	old_cmd = cmd;
-	for (idx=0; idx<6; idx++) {
-		r = &dev->resource[idx];
-		if (!r->start && r->end) {
-			pci_err(dev, "can't enable device: resource collisions\n");
-			return -EINVAL;
-		}
-		if (r->flags & IORESOURCE_IO)
-			cmd |= PCI_COMMAND_IO;
-		if (r->flags & IORESOURCE_MEM)
-			cmd |= PCI_COMMAND_MEMORY;
-	}
-	if (cmd != old_cmd) {
-		pci_info(dev, "enabling device (%04x -> %04x)\n", old_cmd, cmd);
-		pci_write_config_word(dev, PCI_COMMAND, cmd);
-	}
-
-	return 0;
-}
-
 /*
  * Platform support for /proc/bus/pci/X/Y mmap()s.
  *  -- paulus.
diff --git a/arch/xtensa/kernel/platform.c b/arch/xtensa/kernel/platform.c
index 1cf008284dd2..a95ba05b0abe 100644
--- a/arch/xtensa/kernel/platform.c
+++ b/arch/xtensa/kernel/platform.c
@@ -34,8 +34,6 @@ _F(void, halt, (void), { while(1); });
 _F(void, power_off, (void), { while(1); });
 _F(void, idle, (void), { __asm__ __volatile__ ("waiti 0" ::: "memory"); });
 _F(void, heartbeat, (void), { });
-_F(int,  pcibios_fixup, (void), { return 0; });
-_F(void, pcibios_init, (void), { });
 
 #ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
 _F(void, calibrate_ccount, (void),
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 176cb46bcf12..5cb8a62e091c 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -405,10 +405,6 @@ void __init setup_arch(char **cmdline_p)
 	conswitchp = &dummy_con;
 # endif
 #endif
-
-#ifdef CONFIG_PCI
-	platform_pcibios_init();
-#endif
 }
 
 static DEFINE_PER_CPU(struct cpu, cpu_data);