/* $Id: pgalloc.h,v 1.30 2001/12/21 04:56:17 davem Exp $ */ #ifndef _SPARC64_PGALLOC_H #define _SPARC64_PGALLOC_H #include <linux/config.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/mm.h> #include <asm/spitfire.h> #include <asm/cpudata.h> #include <asm/cacheflush.h> /* Page table allocation/freeing. */ #ifdef CONFIG_SMP /* Sliiiicck */ #define pgt_quicklists local_cpu_data() #else extern struct pgtable_cache_struct { unsigned long *pgd_cache; unsigned long *pte_cache[2]; unsigned int pgcache_size; } pgt_quicklists; #endif #define pgd_quicklist (pgt_quicklists.pgd_cache) #define pmd_quicklist ((unsigned long *)0) #define pte_quicklist (pgt_quicklists.pte_cache) #define pgtable_cache_size (pgt_quicklists.pgcache_size) static __inline__ void free_pgd_fast(pgd_t *pgd) { preempt_disable(); *(unsigned long *)pgd = (unsigned long) pgd_quicklist; pgd_quicklist = (unsigned long *) pgd; pgtable_cache_size++; preempt_enable(); } static __inline__ pgd_t *get_pgd_fast(void) { unsigned long *ret; preempt_disable(); if((ret = pgd_quicklist) != NULL) { pgd_quicklist = (unsigned long *)(*ret); ret[0] = 0; pgtable_cache_size--; preempt_enable(); } else { preempt_enable(); ret = (unsigned long *) __get_free_page(GFP_KERNEL|__GFP_REPEAT); if(ret) memset(ret, 0, PAGE_SIZE); } return (pgd_t *)ret; } static __inline__ void free_pgd_slow(pgd_t *pgd) { free_page((unsigned long)pgd); } #ifdef DCACHE_ALIASING_POSSIBLE #define VPTE_COLOR(address) (((address) >> (PAGE_SHIFT + 10)) & 1UL) #define DCACHE_COLOR(address) (((address) >> PAGE_SHIFT) & 1UL) #else #define VPTE_COLOR(address) 0 #define DCACHE_COLOR(address) 0 #endif #define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD) static __inline__ pmd_t *pmd_alloc_one_fast(struct mm_struct *mm, unsigned long address) { unsigned long *ret; int color = 0; preempt_disable(); if (pte_quicklist[color] == NULL) color = 1; if((ret = (unsigned long *)pte_quicklist[color]) != NULL) { pte_quicklist[color] = (unsigned long *)(*ret); ret[0] = 0; pgtable_cache_size--; } preempt_enable(); return (pmd_t *)ret; } static __inline__ pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) { pmd_t *pmd; pmd = pmd_alloc_one_fast(mm, address); if (!pmd) { pmd = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT); if (pmd) memset(pmd, 0, PAGE_SIZE); } return pmd; } static __inline__ void free_pmd_fast(pmd_t *pmd) { unsigned long color = DCACHE_COLOR((unsigned long)pmd); preempt_disable(); *(unsigned long *)pmd = (unsigned long) pte_quicklist[color]; pte_quicklist[color] = (unsigned long *) pmd; pgtable_cache_size++; preempt_enable(); } static __inline__ void free_pmd_slow(pmd_t *pmd) { free_page((unsigned long)pmd); } #define pmd_populate_kernel(MM, PMD, PTE) pmd_set(PMD, PTE) #define pmd_populate(MM,PMD,PTE_PAGE) \ pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE)) extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address); static inline struct page * pte_alloc_one(struct mm_struct *mm, unsigned long addr) { pte_t *pte = pte_alloc_one_kernel(mm, addr); if (pte) return virt_to_page(pte); return NULL; } static __inline__ pte_t *pte_alloc_one_fast(struct mm_struct *mm, unsigned long address) { unsigned long color = VPTE_COLOR(address); unsigned long *ret; preempt_disable(); if((ret = (unsigned long *)pte_quicklist[color]) != NULL) { pte_quicklist[color] = (unsigned long *)(*ret); ret[0] = 0; pgtable_cache_size--; } preempt_enable(); return (pte_t *)ret; } static __inline__ void free_pte_fast(pte_t *pte) { unsigned long color = DCACHE_COLOR((unsigned long)pte); preempt_disable(); *(unsigned long *)pte = (unsigned long) pte_quicklist[color]; pte_quicklist[color] = (unsigned long *) pte; pgtable_cache_size++; preempt_enable(); } static __inline__ void free_pte_slow(pte_t *pte) { free_page((unsigned long)pte); } static inline void pte_free_kernel(pte_t *pte) { free_pte_fast(pte); } static inline void pte_free(struct page *ptepage) { free_pte_fast(page_address(ptepage)); } #define pmd_free(pmd) free_pmd_fast(pmd) #define pgd_free(pgd) free_pgd_fast(pgd) #define pgd_alloc(mm) get_pgd_fast() #endif /* _SPARC64_PGALLOC_H */