diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-01 18:33:29 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-27 08:47:59 +0100 |
| commit | 4bb2e27db10abc555dfabd73661485fb75e4e97d (patch) | |
| tree | 4d2bf627268e82162583ed35c20ff047ca4d5e2f | |
| parent | 3abe9d33b382cb9eee7bfee8d90b10078f4baa4d (diff) | |
ARM: early_pte_alloc()
Provide a common function for allocating early PTE tables.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/mm/mmu.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 3079d0fd9ce..05dbb956175 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -492,18 +492,21 @@ static void __init *early_alloc(unsigned long sz) return alloc_bootmem_low_pages(sz); } -static void __init alloc_init_pte(pmd_t *pmd, unsigned long addr, - unsigned long end, unsigned long pfn, - const struct mem_type *type) +static pte_t * __init early_pte_alloc(pmd_t *pmd, unsigned long addr, unsigned long prot) { - pte_t *pte; - if (pmd_none(*pmd)) { - pte = early_alloc(2 * PTRS_PER_PTE * sizeof(pte_t)); - __pmd_populate(pmd, __pa(pte) | type->prot_l1); + pte_t *pte = early_alloc(2 * PTRS_PER_PTE * sizeof(pte_t)); + __pmd_populate(pmd, __pa(pte) | prot); } + BUG_ON(pmd_bad(*pmd)); + return pte_offset_kernel(pmd, addr); +} - pte = pte_offset_kernel(pmd, addr); +static void __init alloc_init_pte(pmd_t *pmd, unsigned long addr, + unsigned long end, unsigned long pfn, + const struct mem_type *type) +{ + pte_t *pte = early_pte_alloc(pmd, addr, type->prot_l1); do { set_pte_ext(pte, pfn_pte(pfn, __pgprot(type->prot_pte)), 0); pfn++; @@ -949,11 +952,8 @@ static void __init devicemaps_init(struct machine_desc *mdesc) static void __init kmap_init(void) { #ifdef CONFIG_HIGHMEM - pmd_t *pmd = pmd_off_k(PKMAP_BASE); - pte_t *pte = early_alloc(2 * PTRS_PER_PTE * sizeof(pte_t)); - BUG_ON(!pmd_none(*pmd) || !pte); - __pmd_populate(pmd, __pa(pte) | _PAGE_KERNEL_TABLE); - pkmap_page_table = pte + PTRS_PER_PTE; + pkmap_page_table = early_pte_alloc(pmd_off_k(PKMAP_BASE), + PKMAP_BASE, _PAGE_KERNEL_TABLE); #endif } |