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| author | Catalin Marinas <catalin.marinas@arm.com> | 2014-07-16 12:07:17 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2014-07-23 15:27:00 +0100 |
| commit | 7edd88ad7e59c2b7b49da0e00f251884fb785d4f (patch) | |
| tree | 8e203aaaf6787e4a03d711121ea2166727057504 /arch/arm64/mm | |
| parent | affeafbb84776b8527591aa83c16be67dfa5c985 (diff) | |
| download | linux-7edd88ad7e59c2b7b49da0e00f251884fb785d4f.tar.gz linux-7edd88ad7e59c2b7b49da0e00f251884fb785d4f.tar.bz2 linux-7edd88ad7e59c2b7b49da0e00f251884fb785d4f.zip | |
arm64: Do not initialise the fixmap page tables in head.S
The early_ioremap_init() function already handles fixmap pte
initialisation, so upgrade this to cover all of pud/pmd/pte and remove
one page from swapper_pg_dir.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Jungseok Lee <jungseoklee85@gmail.com>
Diffstat (limited to 'arch/arm64/mm')
| -rw-r--r-- | arch/arm64/mm/ioremap.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/arch/arm64/mm/ioremap.c b/arch/arm64/mm/ioremap.c index 7ec328392ae0..69000efa015e 100644 --- a/arch/arm64/mm/ioremap.c +++ b/arch/arm64/mm/ioremap.c @@ -103,19 +103,25 @@ void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size) } EXPORT_SYMBOL(ioremap_cache); -#ifndef CONFIG_ARM64_64K_PAGES static pte_t bm_pte[PTRS_PER_PTE] __page_aligned_bss; +#ifndef CONFIG_ARM64_64K_PAGES +static pte_t bm_pmd[PTRS_PER_PMD] __page_aligned_bss; #endif -static inline pmd_t * __init early_ioremap_pmd(unsigned long addr) +static inline pud_t * __init early_ioremap_pud(unsigned long addr) { pgd_t *pgd; - pud_t *pud; pgd = pgd_offset_k(addr); BUG_ON(pgd_none(*pgd) || pgd_bad(*pgd)); - pud = pud_offset(pgd, addr); + return pud_offset(pgd, addr); +} + +static inline pmd_t * __init early_ioremap_pmd(unsigned long addr) +{ + pud_t *pud = early_ioremap_pud(addr); + BUG_ON(pud_none(*pud) || pud_bad(*pud)); return pmd_offset(pud, addr); @@ -132,13 +138,17 @@ static inline pte_t * __init early_ioremap_pte(unsigned long addr) void __init early_ioremap_init(void) { + pgd_t *pgd; + pud_t *pud; pmd_t *pmd; + unsigned long addr = fix_to_virt(FIX_BTMAP_BEGIN); - pmd = early_ioremap_pmd(fix_to_virt(FIX_BTMAP_BEGIN)); -#ifndef CONFIG_ARM64_64K_PAGES - /* need to populate pmd for 4k pagesize only */ + pgd = pgd_offset_k(addr); + pud = pud_offset(pgd, addr); + pud_populate(&init_mm, pud, bm_pmd); + pmd = pmd_offset(pud, addr); pmd_populate_kernel(&init_mm, pmd, bm_pte); -#endif + /* * The boot-ioremap range spans multiple pmds, for which * we are not prepared: |