diff options
Diffstat (limited to 'arch/tile/mm/init.c')
| -rw-r--r-- | arch/tile/mm/init.c | 70 |
1 files changed, 29 insertions, 41 deletions
diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c index 630dd2ce2afe..ef29d6c5e10e 100644 --- a/arch/tile/mm/init.c +++ b/arch/tile/mm/init.c @@ -150,7 +150,21 @@ void __init shatter_pmd(pmd_t *pmd) assign_pte(pmd, pte); } -#ifdef CONFIG_HIGHMEM +#ifdef __tilegx__ +static pmd_t *__init get_pmd(pgd_t pgtables[], unsigned long va) +{ + pud_t *pud = pud_offset(&pgtables[pgd_index(va)], va); + if (pud_none(*pud)) + assign_pmd(pud, alloc_pmd()); + return pmd_offset(pud, va); +} +#else +static pmd_t *__init get_pmd(pgd_t pgtables[], unsigned long va) +{ + return pmd_offset(pud_offset(&pgtables[pgd_index(va)], va), va); +} +#endif + /* * This function initializes a certain range of kernel virtual memory * with new bootmem page tables, everywhere page tables are missing in @@ -163,24 +177,17 @@ void __init shatter_pmd(pmd_t *pmd) * checking the pgd every time. */ static void __init page_table_range_init(unsigned long start, - unsigned long end, pgd_t *pgd_base) + unsigned long end, pgd_t *pgd) { - pgd_t *pgd; - int pgd_idx; unsigned long vaddr; - - vaddr = start; - pgd_idx = pgd_index(vaddr); - pgd = pgd_base + pgd_idx; - - for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd++, pgd_idx++) { - pmd_t *pmd = pmd_offset(pud_offset(pgd, vaddr), vaddr); + start = round_down(start, PMD_SIZE); + end = round_up(end, PMD_SIZE); + for (vaddr = start; vaddr < end; vaddr += PMD_SIZE) { + pmd_t *pmd = get_pmd(pgd, vaddr); if (pmd_none(*pmd)) assign_pte(pmd, alloc_pte()); - vaddr += PMD_SIZE; } } -#endif /* CONFIG_HIGHMEM */ #if CHIP_HAS_CBOX_HOME_MAP() @@ -404,21 +411,6 @@ static inline pgprot_t ktext_set_nocache(pgprot_t prot) return prot; } -#ifndef __tilegx__ -static pmd_t *__init get_pmd(pgd_t pgtables[], unsigned long va) -{ - return pmd_offset(pud_offset(&pgtables[pgd_index(va)], va), va); -} -#else -static pmd_t *__init get_pmd(pgd_t pgtables[], unsigned long va) -{ - pud_t *pud = pud_offset(&pgtables[pgd_index(va)], va); - if (pud_none(*pud)) - assign_pmd(pud, alloc_pmd()); - return pmd_offset(pud, va); -} -#endif - /* Temporary page table we use for staging. */ static pgd_t pgtables[PTRS_PER_PGD] __attribute__((aligned(HV_PAGE_TABLE_ALIGN))); @@ -741,16 +733,15 @@ static void __init set_non_bootmem_pages_init(void) for_each_zone(z) { unsigned long start, end; int nid = z->zone_pgdat->node_id; +#ifdef CONFIG_HIGHMEM int idx = zone_idx(z); +#endif start = z->zone_start_pfn; - if (start == 0) - continue; /* bootmem */ end = start + z->spanned_pages; - if (idx == ZONE_NORMAL) { - BUG_ON(start != node_start_pfn[nid]); - start = node_free_pfn[nid]; - } + start = max(start, node_free_pfn[nid]); + start = max(start, max_low_pfn); + #ifdef CONFIG_HIGHMEM if (idx == ZONE_HIGHMEM) totalhigh_pages += z->spanned_pages; @@ -779,9 +770,6 @@ static void __init set_non_bootmem_pages_init(void) */ void __init paging_init(void) { -#ifdef CONFIG_HIGHMEM - unsigned long vaddr, end; -#endif #ifdef __tilegx__ pud_t *pud; #endif @@ -789,14 +777,14 @@ void __init paging_init(void) kernel_physical_mapping_init(pgd_base); -#ifdef CONFIG_HIGHMEM /* * Fixed mappings, only the page table structure has to be * created - mappings will be set by set_fixmap(): */ - vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; - end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK; - page_table_range_init(vaddr, end, pgd_base); + page_table_range_init(fix_to_virt(__end_of_fixed_addresses - 1), + FIXADDR_TOP, pgd_base); + +#ifdef CONFIG_HIGHMEM permanent_kmaps_init(pgd_base); #endif |