1 #ifndef __ASM_SH_PGALLOC_H 2 #define __ASM_SH_PGALLOC_H 3 4 #include <linux/quicklist.h> 5 #include <asm/page.h> 6 7 #define QUICK_PT 0 /* Other page table pages that are zero on free */ 8 9 extern pgd_t *pgd_alloc(struct mm_struct *); 10 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); 11 12 #if PAGETABLE_LEVELS > 2 13 extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); 14 extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address); 15 extern void pmd_free(struct mm_struct *mm, pmd_t *pmd); 16 #endif 17 18 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, 19 pte_t *pte) 20 { 21 set_pmd(pmd, __pmd((unsigned long)pte)); 22 } 23 24 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 25 pgtable_t pte) 26 { 27 set_pmd(pmd, __pmd((unsigned long)page_address(pte))); 28 } 29 #define pmd_pgtable(pmd) pmd_page(pmd) 30 31 /* 32 * Allocate and free page tables. 33 */ 34 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 35 unsigned long address) 36 { 37 return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); 38 } 39 40 static inline pgtable_t pte_alloc_one(struct mm_struct *mm, 41 unsigned long address) 42 { 43 struct page *page; 44 void *pg; 45 46 pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); 47 if (!pg) 48 return NULL; 49 page = virt_to_page(pg); 50 if (!pgtable_page_ctor(page)) { 51 quicklist_free(QUICK_PT, NULL, pg); 52 return NULL; 53 } 54 return page; 55 } 56 57 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 58 { 59 quicklist_free(QUICK_PT, NULL, pte); 60 } 61 62 static inline void pte_free(struct mm_struct *mm, pgtable_t pte) 63 { 64 pgtable_page_dtor(pte); 65 quicklist_free_page(QUICK_PT, NULL, pte); 66 } 67 68 #define __pte_free_tlb(tlb,pte,addr) \ 69 do { \ 70 pgtable_page_dtor(pte); \ 71 tlb_remove_page((tlb), (pte)); \ 72 } while (0) 73 74 static inline void check_pgt_cache(void) 75 { 76 quicklist_trim(QUICK_PT, NULL, 25, 16); 77 } 78 79 #endif /* __ASM_SH_PGALLOC_H */ 80