#ifndef __ASM_SH_PGALLOC_H #define __ASM_SH_PGALLOC_H #include <linux/quicklist.h> #include <asm/page.h> #define QUICK_PGD 0 /* We preserve special mappings over free */ #define QUICK_PT 1 /* Other page table pages that are zero on free */ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) { set_pmd(pmd, __pmd((unsigned long)pte)); } static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte) { set_pmd(pmd, __pmd((unsigned long)page_address(pte))); } static inline void pgd_ctor(void *x) { pgd_t *pgd = x; memcpy(pgd + USER_PTRS_PER_PGD, swapper_pg_dir + USER_PTRS_PER_PGD, (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); } /* * Allocate and free page tables. */ static inline pgd_t *pgd_alloc(struct mm_struct *mm) { return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor); } static inline void pgd_free(pgd_t *pgd) { quicklist_free(QUICK_PGD, NULL, pgd); } static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) { return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); } static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address) { void *pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); return pg ? virt_to_page(pg) : NULL; } static inline void pte_free_kernel(pte_t *pte) { quicklist_free(QUICK_PT, NULL, pte); } static inline void pte_free(struct page *pte) { quicklist_free_page(QUICK_PT, NULL, pte); } #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) /* * allocating and freeing a pmd is trivial: the 1-entry pmd is * inside the pgd, so has no extra memory associated with it. */ #define pmd_free(x) do { } while (0) #define __pmd_free_tlb(tlb,x) do { } while (0) static inline void check_pgt_cache(void) { quicklist_trim(QUICK_PGD, NULL, 25, 16); quicklist_trim(QUICK_PT, NULL, 25, 16); } #endif /* __ASM_SH_PGALLOC_H */