| #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 */ |