1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_SH_PGALLOC_H 3 #define __ASM_SH_PGALLOC_H 4 5 #include <linux/quicklist.h> 6 #include <asm/page.h> 7 8 #define QUICK_PT 0 /* Other page table pages that are zero on free */ 9 10 extern pgd_t *pgd_alloc(struct mm_struct *); 11 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); 12 13 #if PAGETABLE_LEVELS > 2 14 extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); 15 extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address); 16 extern void pmd_free(struct mm_struct *mm, pmd_t *pmd); 17 #endif 18 19 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, 20 pte_t *pte) 21 { 22 set_pmd(pmd, __pmd((unsigned long)pte)); 23 } 24 25 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, 26 pgtable_t pte) 27 { 28 set_pmd(pmd, __pmd((unsigned long)page_address(pte))); 29 } 30 #define pmd_pgtable(pmd) pmd_page(pmd) 31 32 /* 33 * Allocate and free page tables. 34 */ 35 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) 36 { 37 return quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL); 38 } 39 40 static inline pgtable_t pte_alloc_one(struct mm_struct *mm) 41 { 42 struct page *page; 43 void *pg; 44 45 pg = quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL); 46 if (!pg) 47 return NULL; 48 page = virt_to_page(pg); 49 if (!pgtable_page_ctor(page)) { 50 quicklist_free(QUICK_PT, NULL, pg); 51 return NULL; 52 } 53 return page; 54 } 55 56 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 57 { 58 quicklist_free(QUICK_PT, NULL, pte); 59 } 60 61 static inline void pte_free(struct mm_struct *mm, pgtable_t pte) 62 { 63 pgtable_page_dtor(pte); 64 quicklist_free_page(QUICK_PT, NULL, pte); 65 } 66 67 #define __pte_free_tlb(tlb,pte,addr) \ 68 do { \ 69 pgtable_page_dtor(pte); \ 70 tlb_remove_page((tlb), (pte)); \ 71 } while (0) 72 73 #if CONFIG_PGTABLE_LEVELS > 2 74 #define __pmd_free_tlb(tlb, pmdp, addr) \ 75 do { \ 76 struct page *page = virt_to_page(pmdp); \ 77 pgtable_pmd_page_dtor(page); \ 78 tlb_remove_page((tlb), page); \ 79 } while (0); 80 #endif 81 82 static inline void check_pgt_cache(void) 83 { 84 quicklist_trim(QUICK_PT, NULL, 25, 16); 85 } 86 87 #endif /* __ASM_SH_PGALLOC_H */ 88