[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>

/* 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 */
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>
	13
	14	/* Page table allocation/freeing. */
	15	#ifdef CONFIG_SMP
	16	/* Sliiiicck */
	17	#define pgt_quicklists local_cpu_data()
	18	#else
	19	extern struct pgtable_cache_struct {
	20	unsigned long *pgd_cache;
	21	unsigned long *pte_cache[2];
	22	unsigned int pgcache_size;
	23	} pgt_quicklists;
	24	#endif
	25	#define pgd_quicklist (pgt_quicklists.pgd_cache)
	26	#define pmd_quicklist ((unsigned long *)0)
	27	#define pte_quicklist (pgt_quicklists.pte_cache)
	28	#define pgtable_cache_size (pgt_quicklists.pgcache_size)
	29
	30	static __inline__ void free_pgd_fast(pgd_t *pgd)
	31	{
	32	preempt_disable();
	33	(unsigned long )pgd = (unsigned long) pgd_quicklist;
	34	pgd_quicklist = (unsigned long *) pgd;
	35	pgtable_cache_size++;
	36	preempt_enable();
	37	}
	38
	39	static __inline__ pgd_t *get_pgd_fast(void)
	40	{
	41	unsigned long *ret;
	42
	43	preempt_disable();
	44	if((ret = pgd_quicklist) != NULL) {
	45	pgd_quicklist = (unsigned long )(ret);
	46	ret[0] = 0;
	47	pgtable_cache_size--;
	48	preempt_enable();
	49	} else {
	50	preempt_enable();
	51	ret = (unsigned long *) __get_free_page(GFP_KERNEL\|__GFP_REPEAT);
	52	if(ret)
	53	memset(ret, 0, PAGE_SIZE);
	54	}
	55	return (pgd_t *)ret;
	56	}
	57
	58	static __inline__ void free_pgd_slow(pgd_t *pgd)
	59	{
	60	free_page((unsigned long)pgd);
	61	}
	62
	63	#ifdef DCACHE_ALIASING_POSSIBLE
	64	#define VPTE_COLOR(address) (((address) >> (PAGE_SHIFT + 10)) & 1UL)
65	#define DCACHE_COLOR(address) (((address) >> PAGE_SHIFT) & 1UL)
66	#else
67	#define VPTE_COLOR(address) 0
68	#define DCACHE_COLOR(address) 0
69	#endif
70
71	#define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD)
72
73	static __inline__ pmd_t pmd_alloc_one_fast(struct mm_struct mm, unsigned long address)
74	{
75	unsigned long *ret;
76	int color = 0;
77
78	preempt_disable();
79	if (pte_quicklist[color] == NULL)
80	color = 1;
81
82	if((ret = (unsigned long *)pte_quicklist[color]) != NULL) {
83	pte_quicklist[color] = (unsigned long )(ret);
84	ret[0] = 0;
85	pgtable_cache_size--;
86	}
87	preempt_enable();
88
89	return (pmd_t *)ret;
90	}
91
92	static __inline__ pmd_t pmd_alloc_one(struct mm_struct mm, unsigned long address)
93	{
94	pmd_t *pmd;
95
96	pmd = pmd_alloc_one_fast(mm, address);
97	if (!pmd) {
98	pmd = (pmd_t *)__get_free_page(GFP_KERNEL\|__GFP_REPEAT);
99	if (pmd)
100	memset(pmd, 0, PAGE_SIZE);
101	}
102	return pmd;
103	}
104
105	static __inline__ void free_pmd_fast(pmd_t *pmd)
106	{
107	unsigned long color = DCACHE_COLOR((unsigned long)pmd);
108
109	preempt_disable();
110	(unsigned long )pmd = (unsigned long) pte_quicklist[color];
111	pte_quicklist[color] = (unsigned long *) pmd;
112	pgtable_cache_size++;
113	preempt_enable();
114	}
115
116	static __inline__ void free_pmd_slow(pmd_t *pmd)
117	{
118	free_page((unsigned long)pmd);
119	}
120
121	#define pmd_populate_kernel(MM, PMD, PTE) pmd_set(PMD, PTE)
122	#define pmd_populate(MM,PMD,PTE_PAGE) \
123	pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE))
124
8edf72eb	125	extern pte_t pte_alloc_one_kernel(struct mm_struct mm, unsigned long address);
1da177e4 LT	126
	127	static inline struct page *
	128	pte_alloc_one(struct mm_struct *mm, unsigned long addr)
	129	{
8edf72eb	130	pte_t *pte = pte_alloc_one_kernel(mm, addr);
1da177e4 LT	131
	132	if (pte)
	133	return virt_to_page(pte);
	134
	135	return NULL;
	136	}
	137
	138	static __inline__ pte_t pte_alloc_one_fast(struct mm_struct mm, unsigned long address)
	139	{
	140	unsigned long color = VPTE_COLOR(address);
	141	unsigned long *ret;
	142
	143	preempt_disable();
	144	if((ret = (unsigned long *)pte_quicklist[color]) != NULL) {
	145	pte_quicklist[color] = (unsigned long )(ret);
	146	ret[0] = 0;
	147	pgtable_cache_size--;
	148	}
	149	preempt_enable();
	150	return (pte_t *)ret;
	151	}
	152
	153	static __inline__ void free_pte_fast(pte_t *pte)
	154	{
	155	unsigned long color = DCACHE_COLOR((unsigned long)pte);
	156
	157	preempt_disable();
	158	(unsigned long )pte = (unsigned long) pte_quicklist[color];
	159	pte_quicklist[color] = (unsigned long *) pte;
	160	pgtable_cache_size++;
	161	preempt_enable();
	162	}
	163
	164	static __inline__ void free_pte_slow(pte_t *pte)
	165	{
	166	free_page((unsigned long)pte);
	167	}
	168
	169	static inline void pte_free_kernel(pte_t *pte)
	170	{
	171	free_pte_fast(pte);
	172	}
	173
	174	static inline void pte_free(struct page *ptepage)
	175	{
	176	free_pte_fast(page_address(ptepage));
	177	}
	178
	179	#define pmd_free(pmd) free_pmd_fast(pmd)
	180	#define pgd_free(pgd) free_pgd_fast(pgd)
	181	#define pgd_alloc(mm) get_pgd_fast()
	182
	183	#endif /* _SPARC64_PGALLOC_H */