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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
8static inline pgd_t *pgd_alloc(struct mm_struct *mm)
9{
10 pgd_t *pgd = kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
11 pgtable_gfp_flags(mm, GFP_KERNEL));
12
13#ifdef CONFIG_PPC_BOOK3S_603
14 memcpy(pgd + USER_PTRS_PER_PGD, swapper_pg_dir + USER_PTRS_PER_PGD,
15 (MAX_PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
16#endif
17 return pgd;
18}
19
20static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
21{
22 kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
23}
24
25/*
26 * We don't have any real pmd's, and this code never triggers because
27 * the pgd will always be present..
28 */
29/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */
30#define pmd_free(mm, x) do { } while (0)
31#define __pmd_free_tlb(tlb,x,a) do { } while (0)
32/* #define pgd_populate(mm, pmd, pte) BUG() */
33
34static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp,
35 pte_t *pte)
36{
37 *pmdp = __pmd(__pa(pte) | _PMD_PRESENT);
38}
39
40static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
41 pgtable_t pte_page)
42{
43 *pmdp = __pmd(__pa(pte_page) | _PMD_PRESENT);
44}
45
46static inline void pgtable_free(void *table, unsigned index_size)
47{
48 if (!index_size) {
49 pte_fragment_free((unsigned long *)table, 0);
50 } else {
51 BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE);
52 kmem_cache_free(PGT_CACHE(index_size), table);
53 }
54}
55
56static inline void pgtable_free_tlb(struct mmu_gather *tlb,
57 void *table, int shift)
58{
59 unsigned long pgf = (unsigned long)table;
60 BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
61 pgf |= shift;
62 tlb_remove_table(tlb, (void *)pgf);
63}
64
65static inline void __tlb_remove_table(void *_table)
66{
67 void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
68 unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
69
70 pgtable_free(table, shift);
71}
72
73static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
74 unsigned long address)
75{
76 pgtable_free_tlb(tlb, table, 0);
77}
78#endif /* _ASM_POWERPC_BOOK3S_32_PGALLOC_H */