/* $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()#elseextern 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 */