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/* $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;
unsigned int pgcache_size;
} pgt_quicklists;
#endif
#define pgd_quicklist (pgt_quicklists.pgd_cache)
#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);
}
#define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD)
static inline pmd_t *pmd_alloc_one_fast(void)
{
unsigned long *ret;
preempt_disable();
ret = (unsigned long *) pte_quicklist;
if (likely(ret)) {
pte_quicklist = (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();
if (unlikely(!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)
{
preempt_disable();
*(unsigned long *)pmd = (unsigned long) pte_quicklist;
pte_quicklist = (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))
static inline pte_t *pte_alloc_one_fast(void)
{
unsigned long *ret;
preempt_disable();
ret = (unsigned long *) pte_quicklist;
if (likely(ret)) {
pte_quicklist = (unsigned long *)(*ret);
ret[0] = 0;
pgtable_cache_size--;
}
preempt_enable();
return (pte_t *) ret;
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
pte_t *ptep = pte_alloc_one_fast();
if (likely(ptep))
return ptep;
return (pte_t *) get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr)
{
pte_t *pte = pte_alloc_one_fast();
if (likely(pte))
return virt_to_page(pte);
return alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
}
static inline void free_pte_fast(pte_t *pte)
{
preempt_disable();
*(unsigned long *)pte = (unsigned long) pte_quicklist;
pte_quicklist = (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 */
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