265 lines
6.1 KiB
C
265 lines
6.1 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/page.h>
|
|
#include <asm/spitfire.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/cpudata.h>
|
|
|
|
/* Page table allocation/freeing. */
|
|
#ifdef CONFIG_SMP
|
|
/* Sliiiicck */
|
|
#define pgt_quicklists cpu_data(smp_processor_id())
|
|
#else
|
|
extern struct pgtable_cache_struct {
|
|
unsigned long *pgd_cache;
|
|
unsigned long *pte_cache[2];
|
|
unsigned int pgcache_size;
|
|
unsigned int pgdcache_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)
|
|
#define pgd_cache_size (pgt_quicklists.pgdcache_size)
|
|
|
|
#ifndef CONFIG_SMP
|
|
|
|
static __inline__ void free_pgd_fast(pgd_t *pgd)
|
|
{
|
|
struct page *page = virt_to_page(pgd);
|
|
|
|
preempt_disable();
|
|
if (!page->lru.prev) {
|
|
page->lru.next = (void *) pgd_quicklist;
|
|
pgd_quicklist = (unsigned long *)page;
|
|
}
|
|
page->lru.prev = (void *)
|
|
(((unsigned long)page->lru.prev) |
|
|
(((unsigned long)pgd & (PAGE_SIZE / 2)) ? 2 : 1));
|
|
pgd_cache_size++;
|
|
preempt_enable();
|
|
}
|
|
|
|
static __inline__ pgd_t *get_pgd_fast(void)
|
|
{
|
|
struct page *ret;
|
|
|
|
preempt_disable();
|
|
if ((ret = (struct page *)pgd_quicklist) != NULL) {
|
|
unsigned long mask = (unsigned long)ret->lru.prev;
|
|
unsigned long off = 0;
|
|
|
|
if (mask & 1)
|
|
mask &= ~1;
|
|
else {
|
|
off = PAGE_SIZE / 2;
|
|
mask &= ~2;
|
|
}
|
|
ret->lru.prev = (void *) mask;
|
|
if (!mask)
|
|
pgd_quicklist = (unsigned long *)ret->lru.next;
|
|
ret = (struct page *)(__page_address(ret) + off);
|
|
pgd_cache_size--;
|
|
preempt_enable();
|
|
} else {
|
|
struct page *page;
|
|
|
|
preempt_enable();
|
|
page = alloc_page(GFP_KERNEL|__GFP_REPEAT);
|
|
if (page) {
|
|
ret = (struct page *)page_address(page);
|
|
clear_page(ret);
|
|
page->lru.prev = (void *) 2UL;
|
|
|
|
preempt_disable();
|
|
page->lru.next = (void *) pgd_quicklist;
|
|
pgd_quicklist = (unsigned long *)page;
|
|
pgd_cache_size++;
|
|
preempt_enable();
|
|
}
|
|
}
|
|
return (pgd_t *)ret;
|
|
}
|
|
|
|
#else /* CONFIG_SMP */
|
|
|
|
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);
|
|
}
|
|
|
|
#endif /* CONFIG_SMP */
|
|
|
|
#if (L1DCACHE_SIZE > PAGE_SIZE) /* is there D$ aliasing problem */
|
|
#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 pgd_populate(MM, PGD, PMD) pgd_set(PGD, 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)
|
|
{
|
|
pte_t *pte = __pte_alloc_one_kernel(mm, address);
|
|
if (pte) {
|
|
struct page *page = virt_to_page(pte);
|
|
page->mapping = (void *) mm;
|
|
page->index = address & PMD_MASK;
|
|
}
|
|
return pte;
|
|
}
|
|
|
|
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) {
|
|
struct page *page = virt_to_page(pte);
|
|
page->mapping = (void *) mm;
|
|
page->index = addr & PMD_MASK;
|
|
return page;
|
|
}
|
|
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)
|
|
{
|
|
virt_to_page(pte)->mapping = NULL;
|
|
free_pte_fast(pte);
|
|
}
|
|
|
|
static inline void pte_free(struct page *ptepage)
|
|
{
|
|
ptepage->mapping = NULL;
|
|
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 */
|