1#ifndef _I386_PGALLOC_H 2#define _I386_PGALLOC_H 3 4#include <linux/threads.h> 5#include <linux/mm.h> /* for struct page */ 6 7#ifdef CONFIG_PARAVIRT 8#include <asm/paravirt.h> 9#else 10#define paravirt_alloc_pt(mm, pfn) do { } while (0) 11#define paravirt_alloc_pd(pfn) do { } while (0) 12#define paravirt_alloc_pd(pfn) do { } while (0) 13#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0) 14#define paravirt_release_pt(pfn) do { } while (0) 15#define paravirt_release_pd(pfn) do { } while (0) 16#endif 17 18#define pmd_populate_kernel(mm, pmd, pte) \ 19do { \ 20 paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT); \ 21 set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))); \ 22} while (0) 23 24#define pmd_populate(mm, pmd, pte) \ 25do { \ 26 paravirt_alloc_pt(mm, page_to_pfn(pte)); \ 27 set_pmd(pmd, __pmd(_PAGE_TABLE + \ 28 ((unsigned long long)page_to_pfn(pte) << \ 29 (unsigned long long) PAGE_SHIFT))); \ 30} while (0) 31 32/* 33 * Allocate and free page tables. 34 */ 35extern pgd_t *pgd_alloc(struct mm_struct *); 36extern void pgd_free(pgd_t *pgd); 37 38extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); 39extern struct page *pte_alloc_one(struct mm_struct *, unsigned long); 40 41static inline void pte_free_kernel(pte_t *pte) 42{ 43 free_page((unsigned long)pte); 44} 45 46static inline void pte_free(struct page *pte) 47{ 48 __free_page(pte); 49} 50 51 52#define __pte_free_tlb(tlb,pte) \ 53do { \ 54 paravirt_release_pt(page_to_pfn(pte)); \ 55 tlb_remove_page((tlb),(pte)); \ 56} while (0) 57 58#ifdef CONFIG_X86_PAE 59/* 60 * In the PAE case we free the pmds as part of the pgd. 61 */ 62#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) 63#define pmd_free(x) do { } while (0) 64#define __pmd_free_tlb(tlb,x) do { } while (0) 65#define pud_populate(mm, pmd, pte) BUG() 66#endif 67 68#endif /* _I386_PGALLOC_H */ 69