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_PGD 0 /* We preserve special mappings over free */ 8#define QUICK_PT 1 /* Other page table pages that are zero on free */ 9 10static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, 11 pte_t *pte) 12{ 13 set_pmd(pmd, __pmd((unsigned long)pte)); 14} 15 16static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 17 struct page *pte) 18{ 19 set_pmd(pmd, __pmd((unsigned long)page_address(pte))); 20} 21 22static inline void pgd_ctor(void *x) 23{ 24 pgd_t *pgd = x; 25 26 memcpy(pgd + USER_PTRS_PER_PGD, 27 swapper_pg_dir + USER_PTRS_PER_PGD, 28 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); 29} 30 31/* 32 * Allocate and free page tables. 33 */ 34static inline pgd_t *pgd_alloc(struct mm_struct *mm) 35{ 36 return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor); 37} 38 39static inline void pgd_free(pgd_t *pgd) 40{ 41 quicklist_free(QUICK_PGD, NULL, pgd); 42} 43 44static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 45 unsigned long address) 46{ 47 return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); 48} 49 50static inline struct page *pte_alloc_one(struct mm_struct *mm, 51 unsigned long address) 52{ 53 void *pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); 54 return pg ? virt_to_page(pg) : NULL; 55} 56 57static inline void pte_free_kernel(pte_t *pte) 58{ 59 quicklist_free(QUICK_PT, NULL, pte); 60} 61 62static inline void pte_free(struct page *pte) 63{ 64 quicklist_free_page(QUICK_PT, NULL, pte); 65} 66 67#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) 68 69/* 70 * allocating and freeing a pmd is trivial: the 1-entry pmd is 71 * inside the pgd, so has no extra memory associated with it. 72 */ 73 74#define pmd_free(x) do { } while (0) 75#define __pmd_free_tlb(tlb,x) do { } while (0) 76 77static inline void check_pgt_cache(void) 78{ 79 quicklist_trim(QUICK_PGD, NULL, 25, 16); 80 quicklist_trim(QUICK_PT, NULL, 25, 16); 81} 82 83#endif /* __ASM_SH_PGALLOC_H */ 84