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	return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
11			pgtable_gfp_flags(mm, GFP_KERNEL));
12}
13
14static 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
28static 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
34static 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
40static 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#define get_hugepd_cache_index(x)  (x)
51
52static inline void pgtable_free_tlb(struct mmu_gather *tlb,
53				    void *table, int shift)
54{
55	unsigned long pgf = (unsigned long)table;
56	BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
57	pgf |= shift;
58	tlb_remove_table(tlb, (void *)pgf);
59}
60
61static inline void __tlb_remove_table(void *_table)
62{
63	void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
64	unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
65
66	pgtable_free(table, shift);
67}
68
69static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
70				  unsigned long address)
71{
72	pgtable_free_tlb(tlb, table, 0);
73}
74#endif /* _ASM_POWERPC_BOOK3S_32_PGALLOC_H */
75