#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/mm.h> #include <linux/slab.h> #include <linux/cpumask.h> #include <linux/percpu.h> #ifndef CONFIG_PPC_SUBPAGE_PROT static inline void subpage_prot_free(pgd_t *pgd) {} #endif extern struct kmem_cache *pgtable_cache[]; #define PGD_CACHE_NUM 0 #define PUD_CACHE_NUM 1 #define PMD_CACHE_NUM 1 #define HUGEPTE_CACHE_NUM 2 #define PTE_NONCACHE_NUM 7 /* from GFP rather than kmem_cache */ static inline pgd_t *pgd_alloc(struct mm_struct *mm) { return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL); } static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { subpage_prot_free(pgd); kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], 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(pgtable_cache[PUD_CACHE_NUM], GFP_KERNEL|__GFP_REPEAT); } static inline void pud_free(struct mm_struct *mm, pud_t *pud) { kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], 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) #else /* CONFIG_PPC_64K_PAGES */ #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); } #define pmd_populate(mm, pmd, pte_page) \ pmd_populate_kernel(mm, pmd, page_address(pte_page)) #define pmd_pgtable(pmd) pmd_page(pmd) #endif /* CONFIG_PPC_64K_PAGES */ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM], GFP_KERNEL|__GFP_REPEAT); } static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) { kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], 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); } #define PGF_CACHENUM_MASK 0x7 typedef struct pgtable_free { unsigned long val; } pgtable_free_t; static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum, unsigned long mask) { BUG_ON(cachenum > PGF_CACHENUM_MASK); return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum}; } static inline void pgtable_free(pgtable_free_t pgf) { void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK); int cachenum = pgf.val & PGF_CACHENUM_MASK; if (cachenum == PTE_NONCACHE_NUM) free_page((unsigned long)p); else kmem_cache_free(pgtable_cache[cachenum], p); } extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf); #define __pte_free_tlb(tlb,ptepage) \ do { \ pgtable_page_dtor(ptepage); \ pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \ PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \ } while (0) #define __pmd_free_tlb(tlb, pmd) \ pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \ PMD_CACHE_NUM, PMD_TABLE_SIZE-1)) #ifndef CONFIG_PPC_64K_PAGES #define __pud_free_tlb(tlb, pud) \ pgtable_free_tlb(tlb, pgtable_free_cache(pud, \ PUD_CACHE_NUM, PUD_TABLE_SIZE-1)) #endif /* CONFIG_PPC_64K_PAGES */ #define check_pgt_cache() do { } while (0) #endif /* _ASM_POWERPC_PGALLOC_64_H */