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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2015-04-29 10:04:17 +0200 |
|---|---|---|
| committer | ard <ard.biesheuvel@linaro.org> | 2015-12-13 19:18:29 +0100 |
| commit | c7936206b9715d7a3075b53789c1fed0cab9147f (patch) | |
| tree | 218df320e43208e5c8ddf7962b965b4c95f6469e | |
| parent | b430e55b2318ca4523b0e39ff6c0d5a2109159b4 (diff) | |
| download | blackbird-op-linux-c7936206b9715d7a3075b53789c1fed0cab9147f.tar.gz blackbird-op-linux-c7936206b9715d7a3075b53789c1fed0cab9147f.zip | |
ARM: implement create_mapping_late() for EFI use
This implements create_mapping_late(), which we will use to populate
the UEFI Runtime Services page tables.
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>
| -rw-r--r-- | arch/arm/include/asm/mach/map.h | 2 | ||||
| -rw-r--r-- | arch/arm/mm/mmu.c | 20 |
2 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/include/asm/mach/map.h b/arch/arm/include/asm/mach/map.h index f98c7f32c9c8..9b7c328fb207 100644 --- a/arch/arm/include/asm/mach/map.h +++ b/arch/arm/include/asm/mach/map.h @@ -42,6 +42,8 @@ enum { extern void iotable_init(struct map_desc *, int); extern void vm_reserve_area_early(unsigned long addr, unsigned long size, void *caller); +extern void create_mapping_late(struct mm_struct *mm, struct map_desc *md, + bool ng); #ifdef CONFIG_DEBUG_LL extern void debug_ll_addr(unsigned long *paddr, unsigned long *vaddr); diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 2d9f628a7fe8..8c69830e791a 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -724,6 +724,14 @@ static void __init *early_alloc(unsigned long sz) return early_alloc_aligned(sz, sz); } +static void *__init late_alloc(unsigned long sz) +{ + void *ptr = (void *)__get_free_pages(PGALLOC_GFP, get_order(sz)); + + BUG_ON(!ptr); + return ptr; +} + static pte_t * __init pte_alloc(pmd_t *pmd, unsigned long addr, unsigned long prot, void *(*alloc)(unsigned long sz)) @@ -960,6 +968,18 @@ static void __init create_mapping(struct map_desc *md) __create_mapping(&init_mm, md, early_alloc, false); } +void __init create_mapping_late(struct mm_struct *mm, struct map_desc *md, + bool ng) +{ +#ifdef CONFIG_ARM_LPAE + pud_t *pud = pud_alloc(mm, pgd_offset(mm, md->virtual), md->virtual); + if (WARN_ON(!pud)) + return; + pmd_alloc(mm, pud, 0); +#endif + __create_mapping(mm, md, late_alloc, ng); +} + /* * Create the architecture specific mappings */ |
