1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* sun3_pgalloc.h -- 3 * reorganization around 2.3.39, routines moved from sun3_pgtable.h 4 * 5 * 6 * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam) 7 * 8 * moved 1/26/2000 Sam Creasey 9 */ 10 11 #ifndef _SUN3_PGALLOC_H 12 #define _SUN3_PGALLOC_H 13 14 #include <asm/tlb.h> 15 16 #include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ 17 18 extern const char bad_pmd_string[]; 19 20 #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) 21 22 #define __pte_free_tlb(tlb,pte,addr) \ 23 do { \ 24 pgtable_page_dtor(pte); \ 25 tlb_remove_page((tlb), pte); \ 26 } while (0) 27 28 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) 29 { 30 pmd_val(*pmd) = __pa((unsigned long)pte); 31 } 32 33 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page) 34 { 35 pmd_val(*pmd) = __pa((unsigned long)page_address(page)); 36 } 37 #define pmd_pgtable(pmd) pmd_page(pmd) 38 39 /* 40 * allocating and freeing a pmd is trivial: the 1-entry pmd is 41 * inside the pgd, so has no extra memory associated with it. 42 */ 43 #define pmd_free(mm, x) do { } while (0) 44 #define __pmd_free_tlb(tlb, x, addr) do { } while (0) 45 46 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 47 { 48 free_page((unsigned long) pgd); 49 } 50 51 static inline pgd_t * pgd_alloc(struct mm_struct *mm) 52 { 53 pgd_t *new_pgd; 54 55 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); 56 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE); 57 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT)); 58 return new_pgd; 59 } 60 61 #define pgd_populate(mm, pmd, pte) BUG() 62 63 #endif /* SUN3_PGALLOC_H */ 64