[deliverable/linux.git] / include / asm-sparc64 / pgalloc.h

/* $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>
#include <asm/page.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);
}

/* XXX This crap can die, no longer using virtual page tables... */
#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 */
Commit	Line	Data
1da177e4 LT	1	/* $Id: pgalloc.h,v 1.30 2001/12/21 04:56:17 davem Exp $ */
	2	#ifndef _SPARC64_PGALLOC_H
	3	#define _SPARC64_PGALLOC_H
	4
	5	#include <linux/config.h>
	6	#include <linux/kernel.h>
	7	#include <linux/sched.h>
	8	#include <linux/mm.h>
	9
	10	#include <asm/spitfire.h>
	11	#include <asm/cpudata.h>
	12	#include <asm/cacheflush.h>
6a9b490d	13	#include <asm/page.h>
1da177e4 LT	14
	15	/* Page table allocation/freeing. */
	16	#ifdef CONFIG_SMP
	17	/* Sliiiicck */
	18	#define pgt_quicklists local_cpu_data()
	19	#else
	20	extern struct pgtable_cache_struct {
	21	unsigned long *pgd_cache;
	22	unsigned long *pte_cache[2];
	23	unsigned int pgcache_size;
	24	} pgt_quicklists;
	25	#endif
	26	#define pgd_quicklist (pgt_quicklists.pgd_cache)
	27	#define pmd_quicklist ((unsigned long *)0)
	28	#define pte_quicklist (pgt_quicklists.pte_cache)
	29	#define pgtable_cache_size (pgt_quicklists.pgcache_size)
	30
	31	static __inline__ void free_pgd_fast(pgd_t *pgd)
	32	{
	33	preempt_disable();
	34	(unsigned long )pgd = (unsigned long) pgd_quicklist;
	35	pgd_quicklist = (unsigned long *) pgd;
	36	pgtable_cache_size++;
	37	preempt_enable();
	38	}
	39
	40	static __inline__ pgd_t *get_pgd_fast(void)
	41	{
	42	unsigned long *ret;
	43
	44	preempt_disable();
	45	if((ret = pgd_quicklist) != NULL) {
	46	pgd_quicklist = (unsigned long )(ret);
	47	ret[0] = 0;
	48	pgtable_cache_size--;
	49	preempt_enable();
	50	} else {
	51	preempt_enable();
	52	ret = (unsigned long *) __get_free_page(GFP_KERNEL\|__GFP_REPEAT);
	53	if(ret)
	54	memset(ret, 0, PAGE_SIZE);
	55	}
	56	return (pgd_t *)ret;
	57	}
	58
	59	static __inline__ void free_pgd_slow(pgd_t *pgd)
	60	{
	61	free_page((unsigned long)pgd);
	62	}
	63
74bf4312	64	/* XXX This crap can die, no longer using virtual page tables... */
1da177e4 LT	65	#ifdef DCACHE_ALIASING_POSSIBLE
	66	#define VPTE_COLOR(address) (((address) >> (PAGE_SHIFT + 10)) & 1UL)
	67	#define DCACHE_COLOR(address) (((address) >> PAGE_SHIFT) & 1UL)
	68	#else
	69	#define VPTE_COLOR(address) 0
	70	#define DCACHE_COLOR(address) 0
	71	#endif
	72
	73	#define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD)
	74
	75	static __inline__ pmd_t pmd_alloc_one_fast(struct mm_struct mm, unsigned long address)
	76	{
	77	unsigned long *ret;
	78	int color = 0;
	79
	80	preempt_disable();
	81	if (pte_quicklist[color] == NULL)
	82	color = 1;
	83
	84	if((ret = (unsigned long *)pte_quicklist[color]) != NULL) {
	85	pte_quicklist[color] = (unsigned long )(ret);
	86	ret[0] = 0;
	87	pgtable_cache_size--;
	88	}
	89	preempt_enable();
	90
	91	return (pmd_t *)ret;
	92	}
	93
	94	static __inline__ pmd_t pmd_alloc_one(struct mm_struct mm, unsigned long address)
	95	{
	96	pmd_t *pmd;
	97
	98	pmd = pmd_alloc_one_fast(mm, address);
	99	if (!pmd) {
	100	pmd = (pmd_t *)__get_free_page(GFP_KERNEL\|__GFP_REPEAT);
	101	if (pmd)
	102	memset(pmd, 0, PAGE_SIZE);
	103	}
	104	return pmd;
	105	}
	106
	107	static __inline__ void free_pmd_fast(pmd_t *pmd)
	108	{
	109	unsigned long color = DCACHE_COLOR((unsigned long)pmd);
	110
	111	preempt_disable();
	112	(unsigned long )pmd = (unsigned long) pte_quicklist[color];
	113	pte_quicklist[color] = (unsigned long *) pmd;
	114	pgtable_cache_size++;
	115	preempt_enable();
	116	}
	117
	118	static __inline__ void free_pmd_slow(pmd_t *pmd)
	119	{
	120	free_page((unsigned long)pmd);
	121	}
	122
	123	#define pmd_populate_kernel(MM, PMD, PTE) pmd_set(PMD, PTE)
	124	#define pmd_populate(MM,PMD,PTE_PAGE) \
	125	pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE))
	126
8edf72eb	127	extern pte_t pte_alloc_one_kernel(struct mm_struct mm, unsigned long address);
1da177e4 LT	128
	129	static inline struct page *
	130	pte_alloc_one(struct mm_struct *mm, unsigned long addr)
	131	{
8edf72eb	132	pte_t *pte = pte_alloc_one_kernel(mm, addr);
1da177e4 LT	133
	134	if (pte)
	135	return virt_to_page(pte);
	136
	137	return NULL;
	138	}
	139
	140	static __inline__ pte_t pte_alloc_one_fast(struct mm_struct mm, unsigned long address)
	141	{
	142	unsigned long color = VPTE_COLOR(address);
	143	unsigned long *ret;
	144
	145	preempt_disable();
	146	if((ret = (unsigned long *)pte_quicklist[color]) != NULL) {
	147	pte_quicklist[color] = (unsigned long )(ret);
	148	ret[0] = 0;
	149	pgtable_cache_size--;
	150	}
	151	preempt_enable();
	152	return (pte_t *)ret;
	153	}
	154
	155	static __inline__ void free_pte_fast(pte_t *pte)
	156	{
	157	unsigned long color = DCACHE_COLOR((unsigned long)pte);
	158
	159	preempt_disable();
	160	(unsigned long )pte = (unsigned long) pte_quicklist[color];
	161	pte_quicklist[color] = (unsigned long *) pte;
	162	pgtable_cache_size++;
	163	preempt_enable();
	164	}
	165
	166	static __inline__ void free_pte_slow(pte_t *pte)
	167	{
	168	free_page((unsigned long)pte);
	169	}
	170
	171	static inline void pte_free_kernel(pte_t *pte)
	172	{
	173	free_pte_fast(pte);
	174	}
	175
	176	static inline void pte_free(struct page *ptepage)
	177	{
	178	free_pte_fast(page_address(ptepage));
	179	}
	180
	181	#define pmd_free(pmd) free_pmd_fast(pmd)
	182	#define pgd_free(pgd) free_pgd_fast(pgd)
	183	#define pgd_alloc(mm) get_pgd_fast()
	184
	185	#endif /* _SPARC64_PGALLOC_H */