diff options
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/init_64.c | 94 | ||||
| -rw-r--r-- | arch/x86/mm/ioremap.c | 2 |
2 files changed, 83 insertions, 13 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index d5d4b04d48a..363751dc3fb 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -253,6 +253,43 @@ static __meminit void unmap_low_page(void *adr) early_iounmap(adr, PAGE_SIZE); } +static void __meminit +phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end) +{ + unsigned pages = 0; + int i; + pte_t *pte = pte_page + pte_index(addr); + + for(i = pte_index(addr); i < PTRS_PER_PTE; i++, addr += PAGE_SIZE, pte++) { + + if (addr >= end) { + if (!after_bootmem) { + for(; i < PTRS_PER_PTE; i++, pte++) + set_pte(pte, __pte(0)); + } + break; + } + + if (pte_val(*pte)) + continue; + + if (0) + printk(" pte=%p addr=%lx pte=%016lx\n", + pte, addr, pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL).pte); + set_pte(pte, pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL)); + pages++; + } + update_page_count(PG_LEVEL_4K, pages); +} + +static void __meminit +phys_pte_update(pmd_t *pmd, unsigned long address, unsigned long end) +{ + pte_t *pte = (pte_t *)pmd_page_vaddr(*pmd); + + phys_pte_init(pte, address, end); +} + static unsigned long __meminit phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end) { @@ -261,7 +298,9 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end) int i = pmd_index(address); for (; i < PTRS_PER_PMD; i++, address += PMD_SIZE) { + unsigned long pte_phys; pmd_t *pmd = pmd_page + pmd_index(address); + pte_t *pte; if (address >= end) { if (!after_bootmem) { @@ -271,12 +310,23 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end) break; } - if (pmd_val(*pmd)) + if (pmd_val(*pmd)) { + phys_pte_update(pmd, address, end); + continue; + } + + if (cpu_has_pse) { + pages++; + set_pte((pte_t *)pmd, + pfn_pte(address >> PAGE_SHIFT, PAGE_KERNEL_LARGE)); continue; + } - pages++; - set_pte((pte_t *)pmd, - pfn_pte(address >> PAGE_SHIFT, PAGE_KERNEL_LARGE)); + pte = alloc_low_page(&pte_phys); + phys_pte_init(pte, address, end); + unmap_low_page(pte); + + pmd_populate_kernel(&init_mm, pmd, __va(pte_phys)); } update_page_count(PG_LEVEL_2M, pages); return address; @@ -333,11 +383,11 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end) pmd = alloc_low_page(&pmd_phys); spin_lock(&init_mm.page_table_lock); - pud_populate(&init_mm, pud, __va(pmd_phys)); last_map_addr = phys_pmd_init(pmd, addr, end); + unmap_low_page(pmd); + pud_populate(&init_mm, pud, __va(pmd_phys)); spin_unlock(&init_mm.page_table_lock); - unmap_low_page(pmd); } __flush_tlb_all(); update_page_count(PG_LEVEL_1G, pages); @@ -345,16 +395,30 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end) return last_map_addr; } +static unsigned long __meminit +phys_pud_update(pgd_t *pgd, unsigned long addr, unsigned long end) +{ + pud_t *pud; + + pud = (pud_t *)pgd_page_vaddr(*pgd); + + return phys_pud_init(pud, addr, end); +} + static void __init find_early_table_space(unsigned long end) { - unsigned long puds, pmds, tables, start; + unsigned long puds, tables, start; puds = (end + PUD_SIZE - 1) >> PUD_SHIFT; tables = round_up(puds * sizeof(pud_t), PAGE_SIZE); if (!direct_gbpages) { - pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT; + unsigned long pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT; tables += round_up(pmds * sizeof(pmd_t), PAGE_SIZE); } + if (!cpu_has_pse) { + unsigned long ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT; + tables += round_up(ptes * sizeof(pte_t), PAGE_SIZE); + } /* * RED-PEN putting page tables only on node 0 could @@ -526,19 +590,25 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, unsigned lon unsigned long pud_phys; pud_t *pud; + next = start + PGDIR_SIZE; + if (next > end) + next = end; + + if (pgd_val(*pgd)) { + last_map_addr = phys_pud_update(pgd, __pa(start), __pa(end)); + continue; + } + if (after_bootmem) pud = pud_offset(pgd, start & PGDIR_MASK); else pud = alloc_low_page(&pud_phys); - next = start + PGDIR_SIZE; - if (next > end) - next = end; last_map_addr = phys_pud_init(pud, __pa(start), __pa(next)); + unmap_low_page(pud); if (!after_bootmem) pgd_populate(&init_mm, pgd_offset_k(start), __va(pud_phys)); - unmap_low_page(pud); } if (!after_bootmem) diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 092b3d72498..45e546c4ba7 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -485,7 +485,7 @@ static void __init __early_set_fixmap(enum fixed_addresses idx, if (pgprot_val(flags)) set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags)); else - pte_clear(NULL, addr, pte); + pte_clear(&init_mm, addr, pte); __flush_tlb_one(addr); } |