1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_BOOK3S_32_PGALLOC_H 3 #define _ASM_POWERPC_BOOK3S_32_PGALLOC_H 4 5 #include <linux/threads.h> 6 #include <linux/slab.h> 7 8 static inline pgd_t *pgd_alloc(struct mm_struct *mm) 9 { 10 return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), 11 pgtable_gfp_flags(mm, GFP_KERNEL)); 12 } 13 14 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) 15 { 16 kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); 17 } 18 19 /* 20 * We don't have any real pmd's, and this code never triggers because 21 * the pgd will always be present.. 22 */ 23 /* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */ 24 #define pmd_free(mm, x) do { } while (0) 25 #define __pmd_free_tlb(tlb,x,a) do { } while (0) 26 /* #define pgd_populate(mm, pmd, pte) BUG() */ 27 28 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, 29 pte_t *pte) 30 { 31 *pmdp = __pmd(__pa(pte) | _PMD_PRESENT); 32 } 33 34 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp, 35 pgtable_t pte_page) 36 { 37 *pmdp = __pmd(__pa(pte_page) | _PMD_PRESENT); 38 } 39 40 static inline void pgtable_free(void *table, unsigned index_size) 41 { 42 if (!index_size) { 43 pte_fragment_free((unsigned long *)table, 0); 44 } else { 45 BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE); 46 kmem_cache_free(PGT_CACHE(index_size), table); 47 } 48 } 49 50 static inline void pgtable_free_tlb(struct mmu_gather *tlb, 51 void *table, int shift) 52 { 53 unsigned long pgf = (unsigned long)table; 54 BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); 55 pgf |= shift; 56 tlb_remove_table(tlb, (void *)pgf); 57 } 58 59 static inline void __tlb_remove_table(void *_table) 60 { 61 void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE); 62 unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE; 63 64 pgtable_free(table, shift); 65 } 66 67 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, 68 unsigned long address) 69 { 70 pgtable_free_tlb(tlb, table, 0); 71 } 72 #endif /* _ASM_POWERPC_BOOK3S_32_PGALLOC_H */ 73