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> 17 18 extern const char bad_pmd_string[]; 19 20 #define __pte_free_tlb(tlb, pte, addr) \ 21 do { \ 22 pagetable_pte_dtor(page_ptdesc(pte)); \ 23 tlb_remove_page_ptdesc((tlb), page_ptdesc(pte)); \ 24 } while (0) 25 26 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) 27 { 28 pmd_val(*pmd) = __pa((unsigned long)pte); 29 } 30 31 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page) 32 { 33 pmd_val(*pmd) = __pa((unsigned long)page_address(page)); 34 } 35 36 /* 37 * allocating and freeing a pmd is trivial: the 1-entry pmd is 38 * inside the pgd, so has no extra memory associated with it. 39 */ 40 #define pmd_free(mm, x) do { } while (0) 41 42 static inline pgd_t * pgd_alloc(struct mm_struct *mm) 43 { 44 pgd_t *new_pgd; 45 46 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); 47 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE); 48 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT)); 49 return new_pgd; 50 } 51 52 #endif /* SUN3_PGALLOC_H */ 53