diff options
Diffstat (limited to 'arch/sh/include/asm/pgalloc.h')
-rw-r--r-- | arch/sh/include/asm/pgalloc.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/arch/sh/include/asm/pgalloc.h b/arch/sh/include/asm/pgalloc.h new file mode 100644 index 000000000..ed053a359 --- /dev/null +++ b/arch/sh/include/asm/pgalloc.h @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_SH_PGALLOC_H +#define __ASM_SH_PGALLOC_H + +#include <linux/quicklist.h> +#include <asm/page.h> + +#define QUICK_PT 0 /* Other page table pages that are zero on free */ + +extern pgd_t *pgd_alloc(struct mm_struct *); +extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); + +#if PAGETABLE_LEVELS > 2 +extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd); +extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address); +extern void pmd_free(struct mm_struct *mm, pmd_t *pmd); +#endif + +static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, + pte_t *pte) +{ + set_pmd(pmd, __pmd((unsigned long)pte)); +} + +static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, + pgtable_t pte) +{ + set_pmd(pmd, __pmd((unsigned long)page_address(pte))); +} +#define pmd_pgtable(pmd) pmd_page(pmd) + +/* + * Allocate and free page tables. + */ +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long address) +{ + return quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL); +} + +static inline pgtable_t pte_alloc_one(struct mm_struct *mm, + unsigned long address) +{ + struct page *page; + void *pg; + + pg = quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL); + if (!pg) + return NULL; + page = virt_to_page(pg); + if (!pgtable_page_ctor(page)) { + quicklist_free(QUICK_PT, NULL, pg); + return NULL; + } + return page; +} + +static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) +{ + quicklist_free(QUICK_PT, NULL, pte); +} + +static inline void pte_free(struct mm_struct *mm, pgtable_t pte) +{ + pgtable_page_dtor(pte); + quicklist_free_page(QUICK_PT, NULL, pte); +} + +#define __pte_free_tlb(tlb,pte,addr) \ +do { \ + pgtable_page_dtor(pte); \ + tlb_remove_page((tlb), (pte)); \ +} while (0) + +static inline void check_pgt_cache(void) +{ + quicklist_trim(QUICK_PT, NULL, 25, 16); +} + +#endif /* __ASM_SH_PGALLOC_H */ |