| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* sun3_pgalloc.h -- |
| * reorganization around 2.3.39, routines moved from sun3_pgtable.h |
| * |
| * |
| * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam) |
| * |
| * moved 1/26/2000 Sam Creasey |
| */ |
| |
| #ifndef _SUN3_PGALLOC_H |
| #define _SUN3_PGALLOC_H |
| |
| #include <asm/tlb.h> |
| |
| #include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ |
| |
| extern const char bad_pmd_string[]; |
| |
| #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) |
| |
| #define __pte_free_tlb(tlb,pte,addr) \ |
| do { \ |
| pgtable_page_dtor(pte); \ |
| tlb_remove_page((tlb), pte); \ |
| } while (0) |
| |
| static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) |
| { |
| pmd_val(*pmd) = __pa((unsigned long)pte); |
| } |
| |
| static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page) |
| { |
| pmd_val(*pmd) = __pa((unsigned long)page_address(page)); |
| } |
| #define pmd_pgtable(pmd) pmd_page(pmd) |
| |
| /* |
| * 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(mm, x) do { } while (0) |
| #define __pmd_free_tlb(tlb, x, addr) do { } while (0) |
| |
| static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
| { |
| free_page((unsigned long) pgd); |
| } |
| |
| static inline pgd_t * pgd_alloc(struct mm_struct *mm) |
| { |
| pgd_t *new_pgd; |
| |
| new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); |
| memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE); |
| memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT)); |
| return new_pgd; |
| } |
| |
| #define pgd_populate(mm, pmd, pte) BUG() |
| |
| #endif /* SUN3_PGALLOC_H */ |
