1#ifndef _ASM_POWERPC_PGALLOC_H
 2#define _ASM_POWERPC_PGALLOC_H
 3#ifdef __KERNEL__
 4
 5#include <linux/mm.h>
 6
 7#ifdef CONFIG_PPC_BOOK3E
 8extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address);
 9#else /* CONFIG_PPC_BOOK3E */
10static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
11				     unsigned long address)
12{
 
 
 
13}
14#endif /* !CONFIG_PPC_BOOK3E */
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
15
16extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
 
17
18#ifdef CONFIG_PPC64
19#include <asm/pgalloc-64.h>
20#else
21#include <asm/pgalloc-32.h>
22#endif
23
24#endif /* __KERNEL__ */
25#endif /* _ASM_POWERPC_PGALLOC_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_POWERPC_PGALLOC_H
 3#define _ASM_POWERPC_PGALLOC_H
 
 4
 5#include <linux/mm.h>
 6
 7#ifndef MODULE
 8static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm, gfp_t gfp)
 
 
 
 9{
10	if (unlikely(mm == &init_mm))
11		return gfp;
12	return gfp | __GFP_ACCOUNT;
13}
14#else /* !MODULE */
15static inline gfp_t pgtable_gfp_flags(struct mm_struct *mm, gfp_t gfp)
16{
17	return gfp | __GFP_ACCOUNT;
18}
19#endif /* MODULE */
20
21#define PGALLOC_GFP (GFP_KERNEL | __GFP_ZERO)
22
23pte_t *pte_fragment_alloc(struct mm_struct *mm, int kernel);
24
25static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
26{
27	return (pte_t *)pte_fragment_alloc(mm, 1);
28}
29
30static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
31{
32	return (pgtable_t)pte_fragment_alloc(mm, 0);
33}
34
35void pte_frag_destroy(void *pte_frag);
36void pte_fragment_free(unsigned long *table, int kernel);
37
38static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
39{
40	pte_fragment_free((unsigned long *)pte, 1);
41}
42
43static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
44{
45	pte_fragment_free((unsigned long *)ptepage, 0);
46}
47
48/*
49 * Functions that deal with pagetables that could be at any level of
50 * the table need to be passed an "index_size" so they know how to
51 * handle allocation.  For PTE pages, the allocation size will be
52 * (2^index_size * sizeof(pointer)) and allocations are drawn from
53 * the kmem_cache in PGT_CACHE(index_size).
54 *
55 * The maximum index size needs to be big enough to allow any
56 * pagetable sizes we need, but small enough to fit in the low bits of
57 * any page table pointer.  In other words all pagetables, even tiny
58 * ones, must be aligned to allow at least enough low 0 bits to
59 * contain this value.  This value is also used as a mask, so it must
60 * be one less than a power of two.
61 */
62#define MAX_PGTABLE_INDEX_SIZE	0xf
63
64extern struct kmem_cache *pgtable_cache[];
65#define PGT_CACHE(shift) pgtable_cache[shift]
66
67#ifdef CONFIG_PPC_BOOK3S
68#include <asm/book3s/pgalloc.h>
69#else
70#include <asm/nohash/pgalloc.h>
71#endif
72
 
73#endif /* _ASM_POWERPC_PGALLOC_H */