forked from luck/tmp_suning_uos_patched
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
189 lines
4.3 KiB
C
189 lines
4.3 KiB
C
/* $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 pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
|
|
{
|
|
return __pte_alloc_one_kernel(mm, 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 */
|