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