diff options
author | Max Filippov <jcmvbkbc@gmail.com> | 2016-04-25 22:08:20 +0300 |
---|---|---|
committer | Max Filippov <jcmvbkbc@gmail.com> | 2016-07-24 06:34:00 +0300 |
commit | 0e46c1115f5816949220d62dd3ff04aa68e7ac6b (patch) | |
tree | 2a2ed0cfd8424a3090432128a865f02c009e9214 /arch | |
parent | 3de00482b006daa110151ac6775adc52538a3d6a (diff) | |
download | linux-0e46c1115f5816949220d62dd3ff04aa68e7ac6b.tar.bz2 |
xtensa: drop sysmem and switch to memblock
Memblock is the standard kernel boot-time memory tracker/allocator. Use
it instead of the custom sysmem allocator. This allows using kmemleak,
CMA and device tree memory reservation.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/xtensa/Kconfig | 3 | ||||
-rw-r--r-- | arch/xtensa/include/asm/sysmem.h | 21 | ||||
-rw-r--r-- | arch/xtensa/kernel/setup.c | 36 | ||||
-rw-r--r-- | arch/xtensa/mm/init.c | 272 |
4 files changed, 40 insertions, 292 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 7a4c77b39ce0..d20ddf7bf6a9 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -13,16 +13,19 @@ config XTENSA select GENERIC_IRQ_SHOW select GENERIC_PCI_IOMAP select GENERIC_SCHED_CLOCK + select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_API_DEBUG select HAVE_EXIT_THREAD select HAVE_FUNCTION_TRACER select HAVE_FUTEX_CMPXCHG if !MMU select HAVE_HW_BREAKPOINT if PERF_EVENTS select HAVE_IRQ_TIME_ACCOUNTING + select HAVE_MEMBLOCK select HAVE_OPROFILE select HAVE_PERF_EVENTS select IRQ_DOMAIN select MODULES_USE_ELF_RELA + select NO_BOOTMEM select PERF_USE_VMALLOC select VIRT_TO_BUS help diff --git a/arch/xtensa/include/asm/sysmem.h b/arch/xtensa/include/asm/sysmem.h index c015c5c8e3f7..552cdfd8590e 100644 --- a/arch/xtensa/include/asm/sysmem.h +++ b/arch/xtensa/include/asm/sysmem.h @@ -11,27 +11,8 @@ #ifndef _XTENSA_SYSMEM_H #define _XTENSA_SYSMEM_H -#define SYSMEM_BANKS_MAX 31 +#include <linux/memblock.h> -struct meminfo { - unsigned long start; - unsigned long end; -}; - -/* - * Bank array is sorted by .start. - * Banks don't overlap and there's at least one page gap - * between adjacent bank entries. - */ -struct sysmem_info { - int nr_banks; - struct meminfo bank[SYSMEM_BANKS_MAX]; -}; - -extern struct sysmem_info sysmem; - -int add_sysmem_bank(unsigned long start, unsigned long end); -int mem_reserve(unsigned long, unsigned long, int); void bootmem_init(void); void zones_init(void); diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index 0e59b8900e6a..393206b6aabc 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -7,6 +7,7 @@ * * Copyright (C) 1995 Linus Torvalds * Copyright (C) 2001 - 2005 Tensilica Inc. + * Copyright (C) 2014 - 2016 Cadence Design Systems Inc. * * Chris Zankel <chris@zankel.net> * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com> @@ -24,6 +25,7 @@ #include <linux/percpu.h> #include <linux/clk-provider.h> #include <linux/cpu.h> +#include <linux/of.h> #include <linux/of_fdt.h> #include <linux/of_platform.h> @@ -114,7 +116,7 @@ static int __init parse_tag_mem(const bp_tag_t *tag) if (mi->type != MEMORY_TYPE_CONVENTIONAL) return -1; - return add_sysmem_bank(mi->start, mi->end); + return memblock_add(mi->start, mi->end - mi->start); } __tagtable(BP_TAG_MEMORY, parse_tag_mem); @@ -228,7 +230,7 @@ static int __init xtensa_dt_io_area(unsigned long node, const char *uname, void __init early_init_dt_add_memory_arch(u64 base, u64 size) { size &= PAGE_MASK; - add_sysmem_bank(base, base + size); + memblock_add(base, size); } void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) @@ -440,6 +442,10 @@ static int __init check_s32c1i(void) early_initcall(check_s32c1i); #endif /* CONFIG_S32C1I_SELFTEST */ +static inline int mem_reserve(unsigned long start, unsigned long end) +{ + return memblock_reserve(start, end - start); +} void __init setup_arch(char **cmdline_p) { @@ -451,54 +457,54 @@ void __init setup_arch(char **cmdline_p) #ifdef CONFIG_BLK_DEV_INITRD if (initrd_start < initrd_end) { initrd_is_mapped = mem_reserve(__pa(initrd_start), - __pa(initrd_end), 0) == 0; + __pa(initrd_end)) == 0; initrd_below_start_ok = 1; } else { initrd_start = 0; } #endif - mem_reserve(__pa(&_stext),__pa(&_end), 1); + mem_reserve(__pa(&_stext), __pa(&_end)); mem_reserve(__pa(&_WindowVectors_text_start), - __pa(&_WindowVectors_text_end), 0); + __pa(&_WindowVectors_text_end)); mem_reserve(__pa(&_DebugInterruptVector_literal_start), - __pa(&_DebugInterruptVector_text_end), 0); + __pa(&_DebugInterruptVector_text_end)); mem_reserve(__pa(&_KernelExceptionVector_literal_start), - __pa(&_KernelExceptionVector_text_end), 0); + __pa(&_KernelExceptionVector_text_end)); mem_reserve(__pa(&_UserExceptionVector_literal_start), - __pa(&_UserExceptionVector_text_end), 0); + __pa(&_UserExceptionVector_text_end)); mem_reserve(__pa(&_DoubleExceptionVector_literal_start), - __pa(&_DoubleExceptionVector_text_end), 0); + __pa(&_DoubleExceptionVector_text_end)); #if XCHAL_EXCM_LEVEL >= 2 mem_reserve(__pa(&_Level2InterruptVector_text_start), - __pa(&_Level2InterruptVector_text_end), 0); + __pa(&_Level2InterruptVector_text_end)); #endif #if XCHAL_EXCM_LEVEL >= 3 mem_reserve(__pa(&_Level3InterruptVector_text_start), - __pa(&_Level3InterruptVector_text_end), 0); + __pa(&_Level3InterruptVector_text_end)); #endif #if XCHAL_EXCM_LEVEL >= 4 mem_reserve(__pa(&_Level4InterruptVector_text_start), - __pa(&_Level4InterruptVector_text_end), 0); + __pa(&_Level4InterruptVector_text_end)); #endif #if XCHAL_EXCM_LEVEL >= 5 mem_reserve(__pa(&_Level5InterruptVector_text_start), - __pa(&_Level5InterruptVector_text_end), 0); + __pa(&_Level5InterruptVector_text_end)); #endif #if XCHAL_EXCM_LEVEL >= 6 mem_reserve(__pa(&_Level6InterruptVector_text_start), - __pa(&_Level6InterruptVector_text_end), 0); + __pa(&_Level6InterruptVector_text_end)); #endif #ifdef CONFIG_SMP mem_reserve(__pa(&_SecondaryResetVector_text_start), - __pa(&_SecondaryResetVector_text_end), 0); + __pa(&_SecondaryResetVector_text_end)); #endif parse_early_param(); bootmem_init(); diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c index 302fa72d0d5a..3ee7e29603af 100644 --- a/arch/xtensa/mm/init.c +++ b/arch/xtensa/mm/init.c @@ -8,7 +8,7 @@ * for more details. * * Copyright (C) 2001 - 2005 Tensilica Inc. - * Copyright (C) 2014 Cadence Design Systems Inc. + * Copyright (C) 2014 - 2016 Cadence Design Systems Inc. * * Chris Zankel <chris@zankel.net> * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com> @@ -31,277 +31,35 @@ #include <asm/sections.h> #include <asm/sysmem.h> -struct sysmem_info sysmem __initdata; - -static void __init sysmem_dump(void) -{ - unsigned i; - - pr_debug("Sysmem:\n"); - for (i = 0; i < sysmem.nr_banks; ++i) - pr_debug(" 0x%08lx - 0x%08lx (%ldK)\n", - sysmem.bank[i].start, sysmem.bank[i].end, - (sysmem.bank[i].end - sysmem.bank[i].start) >> 10); -} - -/* - * Find bank with maximal .start such that bank.start <= start - */ -static inline struct meminfo * __init find_bank(unsigned long start) -{ - unsigned i; - struct meminfo *it = NULL; - - for (i = 0; i < sysmem.nr_banks; ++i) - if (sysmem.bank[i].start <= start) - it = sysmem.bank + i; - else - break; - return it; -} - -/* - * Move all memory banks starting at 'from' to a new place at 'to', - * adjust nr_banks accordingly. - * Both 'from' and 'to' must be inside the sysmem.bank. - * - * Returns: 0 (success), -ENOMEM (not enough space in the sysmem.bank). - */ -static int __init move_banks(struct meminfo *to, struct meminfo *from) -{ - unsigned n = sysmem.nr_banks - (from - sysmem.bank); - - if (to > from && to - from + sysmem.nr_banks > SYSMEM_BANKS_MAX) - return -ENOMEM; - if (to != from) - memmove(to, from, n * sizeof(struct meminfo)); - sysmem.nr_banks += to - from; - return 0; -} - -/* - * Add new bank to sysmem. Resulting sysmem is the union of bytes of the - * original sysmem and the new bank. - * - * Returns: 0 (success), < 0 (error) - */ -int __init add_sysmem_bank(unsigned long start, unsigned long end) -{ - unsigned i; - struct meminfo *it = NULL; - unsigned long sz; - unsigned long bank_sz = 0; - - if (start == end || - (start < end) != (PAGE_ALIGN(start) < (end & PAGE_MASK))) { - pr_warn("Ignoring small memory bank 0x%08lx size: %ld bytes\n", - start, end - start); - return -EINVAL; - } - - start = PAGE_ALIGN(start); - end &= PAGE_MASK; - sz = end - start; - - it = find_bank(start); - - if (it) - bank_sz = it->end - it->start; - - if (it && bank_sz >= start - it->start) { - if (end - it->start > bank_sz) - it->end = end; - else - return 0; - } else { - if (!it) - it = sysmem.bank; - else - ++it; - - if (it - sysmem.bank < sysmem.nr_banks && - it->start - start <= sz) { - it->start = start; - if (it->end - it->start < sz) - it->end = end; - else - return 0; - } else { - if (move_banks(it + 1, it) < 0) { - pr_warn("Ignoring memory bank 0x%08lx size %ld bytes\n", - start, end - start); - return -EINVAL; - } - it->start = start; - it->end = end; - return 0; - } - } - sz = it->end - it->start; - for (i = it + 1 - sysmem.bank; i < sysmem.nr_banks; ++i) - if (sysmem.bank[i].start - it->start <= sz) { - if (sz < sysmem.bank[i].end - it->start) - it->end = sysmem.bank[i].end; - } else { - break; - } - - move_banks(it + 1, sysmem.bank + i); - return 0; -} - -/* - * mem_reserve(start, end, must_exist) - * - * Reserve some memory from the memory pool. - * If must_exist is set and a part of the region being reserved does not exist - * memory map is not altered. - * - * Parameters: - * start Start of region, - * end End of region, - * must_exist Must exist in memory pool. - * - * Returns: - * 0 (success) - * < 0 (error) - */ - -int __init mem_reserve(unsigned long start, unsigned long end, int must_exist) -{ - struct meminfo *it; - struct meminfo *rm = NULL; - unsigned long sz; - unsigned long bank_sz = 0; - - start = start & PAGE_MASK; - end = PAGE_ALIGN(end); - sz = end - start; - if (!sz) - return -EINVAL; - - it = find_bank(start); - - if (it) - bank_sz = it->end - it->start; - - if ((!it || end - it->start > bank_sz) && must_exist) { - pr_warn("mem_reserve: [0x%0lx, 0x%0lx) not in any region!\n", - start, end); - return -EINVAL; - } - - if (it && start - it->start <= bank_sz) { - if (start == it->start) { - if (end - it->start < bank_sz) { - it->start = end; - return 0; - } else { - rm = it; - } - } else { - it->end = start; - if (end - it->start < bank_sz) - return add_sysmem_bank(end, - it->start + bank_sz); - ++it; - } - } - - if (!it) - it = sysmem.bank; - - for (; it < sysmem.bank + sysmem.nr_banks; ++it) { - if (it->end - start <= sz) { - if (!rm) - rm = it; - } else { - if (it->start - start < sz) - it->start = end; - break; - } - } - - if (rm) - move_banks(rm, it); - - return 0; -} - - /* * Initialize the bootmem system and give it all low memory we have available. */ void __init bootmem_init(void) { - unsigned long pfn; - unsigned long bootmap_start, bootmap_size; - int i; - - /* Reserve all memory below PLATFORM_DEFAULT_MEM_START, as memory + /* Reserve all memory below PHYS_OFFSET, as memory * accounting doesn't work for pages below that address. * - * If PLATFORM_DEFAULT_MEM_START is zero reserve page at address 0: + * If PHYS_OFFSET is zero reserve page at address 0: * successfull allocations should never return NULL. */ - if (PLATFORM_DEFAULT_MEM_START) - mem_reserve(0, PLATFORM_DEFAULT_MEM_START, 0); + if (PHYS_OFFSET) + memblock_reserve(0, PHYS_OFFSET); else - mem_reserve(0, 1, 0); + memblock_reserve(0, 1); - sysmem_dump(); - max_low_pfn = max_pfn = 0; - min_low_pfn = ~0; - - for (i=0; i < sysmem.nr_banks; i++) { - pfn = PAGE_ALIGN(sysmem.bank[i].start) >> PAGE_SHIFT; - if (pfn < min_low_pfn) - min_low_pfn = pfn; - pfn = PAGE_ALIGN(sysmem.bank[i].end - 1) >> PAGE_SHIFT; - if (pfn > max_pfn) - max_pfn = pfn; - } - if (min_low_pfn > max_pfn) + if (!memblock_phys_mem_size()) panic("No memory found!\n"); + min_low_pfn = PFN_UP(memblock_start_of_DRAM()); + min_low_pfn = max(min_low_pfn, PFN_UP(PHYS_OFFSET)); + max_pfn = PFN_DOWN(memblock_end_of_DRAM()); max_low_pfn = min(max_pfn, MAX_LOW_PFN); - /* Find an area to use for the bootmem bitmap. */ - - bootmap_size = bootmem_bootmap_pages(max_low_pfn - min_low_pfn); - bootmap_size <<= PAGE_SHIFT; - bootmap_start = ~0; - - for (i=0; i<sysmem.nr_banks; i++) - if (sysmem.bank[i].end - sysmem.bank[i].start >= bootmap_size) { - bootmap_start = sysmem.bank[i].start; - break; - } - - if (bootmap_start == ~0UL) - panic("Cannot find %ld bytes for bootmap\n", bootmap_size); - - /* Reserve the bootmem bitmap area */ - - mem_reserve(bootmap_start, bootmap_start + bootmap_size, 1); - bootmap_size = init_bootmem_node(NODE_DATA(0), - bootmap_start >> PAGE_SHIFT, - min_low_pfn, - max_low_pfn); - - /* Add all remaining memory pieces into the bootmem map */ - - for (i = 0; i < sysmem.nr_banks; i++) { - if (sysmem.bank[i].start >> PAGE_SHIFT < max_low_pfn) { - unsigned long end = min(max_low_pfn << PAGE_SHIFT, - sysmem.bank[i].end); - free_bootmem(sysmem.bank[i].start, - end - sysmem.bank[i].start); - } - } + memblock_set_current_limit(PFN_PHYS(max_low_pfn)); + memblock_dump_all(); } @@ -394,16 +152,16 @@ static void __init parse_memmap_one(char *p) switch (*p) { case '@': start_at = memparse(p + 1, &p); - add_sysmem_bank(start_at, start_at + mem_size); + memblock_add(start_at, mem_size); break; case '$': start_at = memparse(p + 1, &p); - mem_reserve(start_at, start_at + mem_size, 0); + memblock_reserve(start_at, mem_size); break; case 0: - mem_reserve(mem_size, 0, 0); + memblock_reserve(mem_size, -mem_size); break; default: |