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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.