77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_NOHASH_PGALLOC_H
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#define _ASM_POWERPC_NOHASH_PGALLOC_H
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#include <linux/mm.h>
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#include <linux/slab.h>
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extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
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#ifdef CONFIG_PPC64
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extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address);
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#else
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/* 44x etc which is BOOKE not BOOK3E */
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static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
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unsigned long address)
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{
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}
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#endif /* !CONFIG_PPC_BOOK3E_64 */
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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pgd_t *pgd = kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
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pgtable_gfp_flags(mm, GFP_KERNEL));
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#if defined(CONFIG_PPC_8xx) || defined(CONFIG_PPC_BOOK3S_603)
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memcpy(pgd + USER_PTRS_PER_PGD, swapper_pg_dir + USER_PTRS_PER_PGD,
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(MAX_PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
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#endif
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return pgd;
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}
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static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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{
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kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
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}
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#ifdef CONFIG_PPC64
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#include <asm/nohash/64/pgalloc.h>
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#else
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#include <asm/nohash/32/pgalloc.h>
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#endif
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static inline void pgtable_free(void *table, int shift)
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{
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if (!shift) {
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pte_fragment_free((unsigned long *)table, 0);
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} else {
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BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
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kmem_cache_free(PGT_CACHE(shift), table);
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}
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}
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static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift)
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{
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unsigned long pgf = (unsigned long)table;
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BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
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pgf |= shift;
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tlb_remove_table(tlb, (void *)pgf);
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}
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static inline void __tlb_remove_table(void *_table)
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{
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void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
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unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
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pgtable_free(table, shift);
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}
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static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
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unsigned long address)
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{
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tlb_flush_pgtable(tlb, address);
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pgtable_free_tlb(tlb, table, 0);
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}
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#endif /* _ASM_POWERPC_NOHASH_PGALLOC_H */
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