diff options
Diffstat (limited to 'include/asm-sparc64/pgalloc.h')
| -rw-r--r-- | include/asm-sparc64/pgalloc.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/include/asm-sparc64/pgalloc.h b/include/asm-sparc64/pgalloc.h new file mode 100644 index 000000000000..2c28e1f605b7 --- /dev/null +++ b/include/asm-sparc64/pgalloc.h @@ -0,0 +1,188 @@ +/* $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 pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) +{ + return __pte_alloc_one_kernel(mm, 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 */ |