mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
8a2cc87a24
pmd_pgtable() is identical on the 4 subarches, refactor it. Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_BOOK3S_32_PGALLOC_H
|
|
#define _ASM_POWERPC_BOOK3S_32_PGALLOC_H
|
|
|
|
#include <linux/threads.h>
|
|
#include <linux/slab.h>
|
|
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE),
|
|
pgtable_gfp_flags(mm, GFP_KERNEL));
|
|
}
|
|
|
|
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
|
|
{
|
|
kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
|
|
}
|
|
|
|
/*
|
|
* We don't have any real pmd's, and this code never triggers because
|
|
* the pgd will always be present..
|
|
*/
|
|
/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) */
|
|
#define pmd_free(mm, x) do { } while (0)
|
|
#define __pmd_free_tlb(tlb,x,a) do { } while (0)
|
|
/* #define pgd_populate(mm, pmd, pte) BUG() */
|
|
|
|
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp,
|
|
pte_t *pte)
|
|
{
|
|
*pmdp = __pmd(__pa(pte) | _PMD_PRESENT);
|
|
}
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmdp,
|
|
pgtable_t pte_page)
|
|
{
|
|
*pmdp = __pmd(__pa(pte_page) | _PMD_PRESENT);
|
|
}
|
|
|
|
static inline void pgtable_free(void *table, unsigned index_size)
|
|
{
|
|
if (!index_size) {
|
|
pte_fragment_free((unsigned long *)table, 0);
|
|
} else {
|
|
BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE);
|
|
kmem_cache_free(PGT_CACHE(index_size), table);
|
|
}
|
|
}
|
|
|
|
#define get_hugepd_cache_index(x) (x)
|
|
|
|
#ifdef CONFIG_SMP
|
|
static inline void pgtable_free_tlb(struct mmu_gather *tlb,
|
|
void *table, int shift)
|
|
{
|
|
unsigned long pgf = (unsigned long)table;
|
|
BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
|
|
pgf |= shift;
|
|
tlb_remove_table(tlb, (void *)pgf);
|
|
}
|
|
|
|
static inline void __tlb_remove_table(void *_table)
|
|
{
|
|
void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
|
|
unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
|
|
|
|
pgtable_free(table, shift);
|
|
}
|
|
#else
|
|
static inline void pgtable_free_tlb(struct mmu_gather *tlb,
|
|
void *table, int shift)
|
|
{
|
|
pgtable_free(table, shift);
|
|
}
|
|
#endif
|
|
|
|
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
|
|
unsigned long address)
|
|
{
|
|
pgtable_free_tlb(tlb, table, 0);
|
|
}
|
|
#endif /* _ASM_POWERPC_BOOK3S_32_PGALLOC_H */
|