/arch/powerpc/include/asm/pgalloc-64.h
http://github.com/mirrors/linux · C Header · 243 lines · 175 code · 40 blank · 28 comment · 4 complexity · bfe678bed8f1c30358742db826d5f9af MD5 · raw file
- #ifndef _ASM_POWERPC_PGALLOC_64_H
- #define _ASM_POWERPC_PGALLOC_64_H
- /*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #include <linux/slab.h>
- #include <linux/cpumask.h>
- #include <linux/percpu.h>
- struct vmemmap_backing {
- struct vmemmap_backing *list;
- unsigned long phys;
- unsigned long virt_addr;
- };
- /*
- * Functions that deal with pagetables that could be at any level of
- * the table need to be passed an "index_size" so they know how to
- * handle allocation. For PTE pages (which are linked to a struct
- * page for now, and drawn from the main get_free_pages() pool), the
- * allocation size will be (2^index_size * sizeof(pointer)) and
- * allocations are drawn from the kmem_cache in PGT_CACHE(index_size).
- *
- * The maximum index size needs to be big enough to allow any
- * pagetable sizes we need, but small enough to fit in the low bits of
- * any page table pointer. In other words all pagetables, even tiny
- * ones, must be aligned to allow at least enough low 0 bits to
- * contain this value. This value is also used as a mask, so it must
- * be one less than a power of two.
- */
- #define MAX_PGTABLE_INDEX_SIZE 0xf
- extern struct kmem_cache *pgtable_cache[];
- #define PGT_CACHE(shift) ({ \
- BUG_ON(!(shift)); \
- pgtable_cache[(shift) - 1]; \
- })
- static inline pgd_t *pgd_alloc(struct mm_struct *mm)
- {
- return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), GFP_KERNEL);
- }
- static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
- {
- kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd);
- }
- #ifndef CONFIG_PPC_64K_PAGES
- #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD)
- static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
- {
- return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE),
- GFP_KERNEL|__GFP_REPEAT);
- }
- static inline void pud_free(struct mm_struct *mm, pud_t *pud)
- {
- kmem_cache_free(PGT_CACHE(PUD_INDEX_SIZE), pud);
- }
- static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
- {
- pud_set(pud, (unsigned long)pmd);
- }
- #define pmd_populate(mm, pmd, pte_page) \
- pmd_populate_kernel(mm, pmd, page_address(pte_page))
- #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
- #define pmd_pgtable(pmd) pmd_page(pmd)
- static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
- unsigned long address)
- {
- return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
- }
- static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
- unsigned long address)
- {
- struct page *page;
- pte_t *pte;
- pte = pte_alloc_one_kernel(mm, address);
- if (!pte)
- return NULL;
- page = virt_to_page(pte);
- pgtable_page_ctor(page);
- return page;
- }
- static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
- {
- free_page((unsigned long)pte);
- }
- static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
- {
- pgtable_page_dtor(ptepage);
- __free_page(ptepage);
- }
- static inline void pgtable_free(void *table, unsigned index_size)
- {
- if (!index_size)
- free_page((unsigned long)table);
- else {
- BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE);
- kmem_cache_free(PGT_CACHE(index_size), table);
- }
- }
- #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 /* !CONFIG_SMP */
- static inline void pgtable_free_tlb(struct mmu_gather *tlb,
- void *table, int shift)
- {
- pgtable_free(table, shift);
- }
- #endif /* CONFIG_SMP */
- static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
- unsigned long address)
- {
- struct page *page = page_address(table);
- tlb_flush_pgtable(tlb, address);
- pgtable_page_dtor(page);
- pgtable_free_tlb(tlb, page, 0);
- }
- #else /* if CONFIG_PPC_64K_PAGES */
- /*
- * we support 16 fragments per PTE page.
- */
- #define PTE_FRAG_NR 16
- /*
- * We use a 2K PTE page fragment and another 2K for storing
- * real_pte_t hash index
- */
- #define PTE_FRAG_SIZE_SHIFT 12
- #define PTE_FRAG_SIZE (2 * PTRS_PER_PTE * sizeof(pte_t))
- extern pte_t *page_table_alloc(struct mm_struct *, unsigned long, int);
- extern void page_table_free(struct mm_struct *, unsigned long *, int);
- extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift);
- #ifdef CONFIG_SMP
- extern void __tlb_remove_table(void *_table);
- #endif
- #define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd)
- static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
- pte_t *pte)
- {
- pmd_set(pmd, (unsigned long)pte);
- }
- static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
- pgtable_t pte_page)
- {
- pmd_set(pmd, (unsigned long)pte_page);
- }
- static inline pgtable_t pmd_pgtable(pmd_t pmd)
- {
- return (pgtable_t)(pmd_val(pmd) & ~PMD_MASKED_BITS);
- }
- static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
- unsigned long address)
- {
- return (pte_t *)page_table_alloc(mm, address, 1);
- }
- static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
- unsigned long address)
- {
- return (pgtable_t)page_table_alloc(mm, address, 0);
- }
- static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
- {
- page_table_free(mm, (unsigned long *)pte, 1);
- }
- static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
- {
- page_table_free(mm, (unsigned long *)ptepage, 0);
- }
- static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table,
- unsigned long address)
- {
- tlb_flush_pgtable(tlb, address);
- pgtable_free_tlb(tlb, table, 0);
- }
- #endif /* CONFIG_PPC_64K_PAGES */
- static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
- {
- return kmem_cache_alloc(PGT_CACHE(PMD_CACHE_INDEX),
- GFP_KERNEL|__GFP_REPEAT);
- }
- static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
- {
- kmem_cache_free(PGT_CACHE(PMD_CACHE_INDEX), pmd);
- }
- #define __pmd_free_tlb(tlb, pmd, addr) \
- pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX)
- #ifndef CONFIG_PPC_64K_PAGES
- #define __pud_free_tlb(tlb, pud, addr) \
- pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE)
- #endif /* CONFIG_PPC_64K_PAGES */
- #define check_pgt_cache() do { } while (0)
- #endif /* _ASM_POWERPC_PGALLOC_64_H */