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author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2015-09-15 14:50:22 +0200 |
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committer | ard <ard.biesheuvel@linaro.org> | 2015-12-13 19:18:28 +0100 |
commit | 1bdb2d4ee05f2fdad4d8a82d7e0ce8d6d91ec4ac (patch) | |
tree | af0656e07c2a2501c8f0b8935dc008a09b7454ba /arch/arm/mm/mmu.c | |
parent | ARM: add support for generic early_ioremap/early_memremap (diff) | |
download | linux-1bdb2d4ee05f2fdad4d8a82d7e0ce8d6d91ec4ac.tar.xz linux-1bdb2d4ee05f2fdad4d8a82d7e0ce8d6d91ec4ac.zip |
ARM: split off core mapping logic from create_mapping
In order to be able to reuse the core mapping logic of create_mapping
for mapping the UEFI Runtime Services into a private set of page tables,
split it off from create_mapping() into a separate function
__create_mapping which we will wire up in a subsequent patch.
Tested-by: Ryan Harkin <ryan.harkin@linaro.org>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Diffstat (limited to 'arch/arm/mm/mmu.c')
-rw-r--r-- | arch/arm/mm/mmu.c | 56 |
1 files changed, 31 insertions, 25 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index de19f90221e2..3100de92148b 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -818,7 +818,8 @@ static void __init alloc_init_pud(pgd_t *pgd, unsigned long addr, } #ifndef CONFIG_ARM_LPAE -static void __init create_36bit_mapping(struct map_desc *md, +static void __init create_36bit_mapping(struct mm_struct *mm, + struct map_desc *md, const struct mem_type *type) { unsigned long addr, length, end; @@ -859,7 +860,7 @@ static void __init create_36bit_mapping(struct map_desc *md, */ phys |= (((md->pfn >> (32 - PAGE_SHIFT)) & 0xF) << 20); - pgd = pgd_offset_k(addr); + pgd = pgd_offset(mm, addr); end = addr + length; do { pud_t *pud = pud_offset(pgd, addr); @@ -876,33 +877,13 @@ static void __init create_36bit_mapping(struct map_desc *md, } #endif /* !CONFIG_ARM_LPAE */ -/* - * Create the page directory entries and any necessary - * page tables for the mapping specified by `md'. We - * are able to cope here with varying sizes and address - * offsets, and we take full advantage of sections and - * supersections. - */ -static void __init create_mapping(struct map_desc *md) +static void __init __create_mapping(struct mm_struct *mm, struct map_desc *md) { unsigned long addr, length, end; phys_addr_t phys; const struct mem_type *type; pgd_t *pgd; - if (md->virtual != vectors_base() && md->virtual < TASK_SIZE) { - pr_warn("BUG: not creating mapping for 0x%08llx at 0x%08lx in user region\n", - (long long)__pfn_to_phys((u64)md->pfn), md->virtual); - return; - } - - if ((md->type == MT_DEVICE || md->type == MT_ROM) && - md->virtual >= PAGE_OFFSET && md->virtual < FIXADDR_START && - (md->virtual < VMALLOC_START || md->virtual >= VMALLOC_END)) { - pr_warn("BUG: mapping for 0x%08llx at 0x%08lx out of vmalloc space\n", - (long long)__pfn_to_phys((u64)md->pfn), md->virtual); - } - type = &mem_types[md->type]; #ifndef CONFIG_ARM_LPAE @@ -910,7 +891,7 @@ static void __init create_mapping(struct map_desc *md) * Catch 36-bit addresses */ if (md->pfn >= 0x100000) { - create_36bit_mapping(md, type); + create_36bit_mapping(mm, md, type); return; } #endif @@ -925,7 +906,7 @@ static void __init create_mapping(struct map_desc *md) return; } - pgd = pgd_offset_k(addr); + pgd = pgd_offset(mm, addr); end = addr + length; do { unsigned long next = pgd_addr_end(addr, end); @@ -938,6 +919,31 @@ static void __init create_mapping(struct map_desc *md) } /* + * Create the page directory entries and any necessary + * page tables for the mapping specified by `md'. We + * are able to cope here with varying sizes and address + * offsets, and we take full advantage of sections and + * supersections. + */ +static void __init create_mapping(struct map_desc *md) +{ + if (md->virtual != vectors_base() && md->virtual < TASK_SIZE) { + pr_warn("BUG: not creating mapping for 0x%08llx at 0x%08lx in user region\n", + (long long)__pfn_to_phys((u64)md->pfn), md->virtual); + return; + } + + if ((md->type == MT_DEVICE || md->type == MT_ROM) && + md->virtual >= PAGE_OFFSET && md->virtual < FIXADDR_START && + (md->virtual < VMALLOC_START || md->virtual >= VMALLOC_END)) { + pr_warn("BUG: mapping for 0x%08llx at 0x%08lx out of vmalloc space\n", + (long long)__pfn_to_phys((u64)md->pfn), md->virtual); + } + + __create_mapping(&init_mm, md); +} + +/* * Create the architecture specific mappings */ void __init iotable_init(struct map_desc *io_desc, int nr) |