diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2007-10-13 14:58:23 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2007-10-13 14:58:23 +0100 |
| commit | ebf8889bd1fe3615991ff4494635d237280652a2 (patch) | |
| tree | 10fb735717122bbb86474339eac07f26e7ccdf40 /include/asm-x86/pgalloc_32.h | |
| parent | b160292cc216a50fd0cd386b0bda2cd48352c73b (diff) | |
| parent | 752097cec53eea111d087c545179b421e2bde98a (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'include/asm-x86/pgalloc_32.h')
| -rw-r--r-- | include/asm-x86/pgalloc_32.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/asm-x86/pgalloc_32.h b/include/asm-x86/pgalloc_32.h new file mode 100644 index 00000000000..f2fc33ceb9f --- /dev/null +++ b/include/asm-x86/pgalloc_32.h @@ -0,0 +1,68 @@ +#ifndef _I386_PGALLOC_H +#define _I386_PGALLOC_H + +#include <linux/threads.h> +#include <linux/mm.h> /* for struct page */ + +#ifdef CONFIG_PARAVIRT +#include <asm/paravirt.h> +#else +#define paravirt_alloc_pt(mm, pfn) do { } while (0) +#define paravirt_alloc_pd(pfn) do { } while (0) +#define paravirt_alloc_pd(pfn) do { } while (0) +#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0) +#define paravirt_release_pt(pfn) do { } while (0) +#define paravirt_release_pd(pfn) do { } while (0) +#endif + +#define pmd_populate_kernel(mm, pmd, pte) \ +do { \ + paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); \ + set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \ +} while (0) + +#define pmd_populate(mm, pmd, pte) \ +do { \ + paravirt_alloc_pt(mm, page_to_pfn(pte)); \ + set_pmd(pmd, __pmd(_PAGE_TABLE + \ + ((unsigned long long)page_to_pfn(pte) << \ + (unsigned long long) PAGE_SHIFT))); \ +} while (0) + +/* + * Allocate and free page tables. + */ +extern pgd_t *pgd_alloc(struct mm_struct *); +extern void pgd_free(pgd_t *pgd); + +extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); +extern struct page *pte_alloc_one(struct mm_struct *, unsigned long); + +static inline void pte_free_kernel(pte_t *pte) +{ + free_page((unsigned long)pte); +} + +static inline void pte_free(struct page *pte) +{ + __free_page(pte); +} + + +#define __pte_free_tlb(tlb,pte) \ +do { \ + paravirt_release_pt(page_to_pfn(pte)); \ + tlb_remove_page((tlb),(pte)); \ +} while (0) + +#ifdef CONFIG_X86_PAE +/* + * In the PAE case we free the pmds as part of the pgd. + */ +#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) +#define pmd_free(x) do { } while (0) +#define __pmd_free_tlb(tlb,x) do { } while (0) +#define pud_populate(mm, pmd, pte) BUG() +#endif + +#endif /* _I386_PGALLOC_H */ |