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#ifndef _X86_64_PGALLOC_H
#define _X86_64_PGALLOC_H
#include <linux/config.h>
#include <asm/processor.h>
#include <asm/fixmap.h>
#include <asm/pda.h>
#include <linux/threads.h>
#include <linux/mm.h>
#include <asm/page.h>
#define inc_pgcache_size() add_pda(pgtable_cache_sz,1UL)
#define dec_pgcache_size() sub_pda(pgtable_cache_sz,1UL)
#define pmd_populate(mm, pmd, pte) \
set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
#define pgd_populate(mm, pgd, pmd) \
set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pmd)))
extern __inline__ pmd_t *get_pmd_slow(void)
{
return (pmd_t *)get_zeroed_page(GFP_KERNEL);
}
extern __inline__ pmd_t *get_pmd_fast(void)
{
unsigned long *ret;
if ((ret = read_pda(pmd_quick)) != NULL) {
write_pda(pmd_quick, (unsigned long *)(*ret));
ret[0] = 0;
dec_pgcache_size();
} else
ret = (unsigned long *)get_pmd_slow();
return (pmd_t *)ret;
}
extern __inline__ void pmd_free(pmd_t *pmd)
{
*(unsigned long *)pmd = (unsigned long) read_pda(pmd_quick);
write_pda(pmd_quick,(unsigned long *) pmd);
inc_pgcache_size();
}
extern __inline__ void pmd_free_slow(pmd_t *pmd)
{
if ((unsigned long)pmd & (PAGE_SIZE-1))
out_of_line_bug();
free_page((unsigned long)pmd);
}
static inline pmd_t *pmd_alloc_one_fast (struct mm_struct *mm, unsigned long addr)
{
unsigned long *ret = (unsigned long *)read_pda(pmd_quick);
if (ret != NULL) {
write_pda(pmd_quick, (unsigned long *)(*ret));
ret[0] = 0;
dec_pgcache_size();
}
return (pmd_t *)ret;
}
static inline pmd_t *pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
{
return (pmd_t *)get_zeroed_page(GFP_KERNEL);
}
static inline pgd_t *pgd_alloc_one_fast (void)
{
unsigned long *ret = read_pda(pgd_quick);
if (ret) {
write_pda(pgd_quick,(unsigned long *)(*ret));
ret[0] = 0;
dec_pgcache_size();
}
return (pgd_t *) ret;
}
static inline pgd_t *pgd_alloc (struct mm_struct *mm)
{
/* the VM system never calls pgd_alloc_one_fast(), so we do it here. */
pgd_t *pgd = pgd_alloc_one_fast();
if (pgd == NULL)
pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
return pgd;
}
static inline void pgd_free (pgd_t *pgd)
{
*(unsigned long *)pgd = (unsigned long) read_pda(pgd_quick);
write_pda(pgd_quick,(unsigned long *) pgd);
inc_pgcache_size();
}
static inline void pgd_free_slow (pgd_t *pgd)
{
if ((unsigned long)pgd & (PAGE_SIZE-1))
out_of_line_bug();
free_page((unsigned long)pgd);
}
static inline pte_t *pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
return (pte_t *)get_zeroed_page(GFP_KERNEL);
}
extern __inline__ pte_t *pte_alloc_one_fast(struct mm_struct *mm, unsigned long address)
{
unsigned long *ret;
if ((ret = read_pda(pte_quick)) != NULL) {
write_pda(pte_quick, (unsigned long *)(*ret));
ret[0] = ret[1];
dec_pgcache_size();
}
return (pte_t *)ret;
}
/* Should really implement gc for free page table pages. This could be done with
a reference count in struct page. */
extern __inline__ void pte_free(pte_t *pte)
{
*(unsigned long *)pte = (unsigned long) read_pda(pte_quick);
write_pda(pte_quick, (unsigned long *) pte);
inc_pgcache_size();
}
extern __inline__ void pte_free_slow(pte_t *pte)
{
if ((unsigned long)pte & (PAGE_SIZE-1))
out_of_line_bug();
free_page((unsigned long)pte);
}
extern int do_check_pgt_cache(int, int);
/*
* TLB flushing:
*
* - flush_tlb() flushes the current mm struct TLBs
* - flush_tlb_all() flushes all processes TLBs
* - flush_tlb_mm(mm) flushes the specified mm context TLB's
* - flush_tlb_page(vma, vmaddr) flushes one page
* - flush_tlb_range(mm, start, end) flushes a range of pages
* - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
*/
#ifndef CONFIG_SMP
#define flush_tlb() __flush_tlb()
#define flush_tlb_all() __flush_tlb_all()
#define local_flush_tlb() __flush_tlb()
static inline void flush_tlb_mm(struct mm_struct *mm)
{
if (mm == current->active_mm)
__flush_tlb();
}
static inline void flush_tlb_page(struct vm_area_struct *vma,
unsigned long addr)
{
if (vma->vm_mm == current->active_mm)
__flush_tlb_one(addr);
}
static inline void flush_tlb_range(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
if (mm == current->active_mm)
__flush_tlb();
}
#else
#include <asm/smp.h>
#define local_flush_tlb() \
__flush_tlb()
extern void flush_tlb_all(void);
extern void flush_tlb_current_task(void);
extern void flush_tlb_mm(struct mm_struct *);
extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
#define flush_tlb() flush_tlb_current_task()
static inline void flush_tlb_range(struct mm_struct * mm, unsigned long start, unsigned long end)
{
flush_tlb_mm(mm);
}
#define TLBSTATE_OK 1
#define TLBSTATE_LAZY 2
struct tlb_state
{
struct mm_struct *active_mm;
int state;
} ____cacheline_aligned;
extern struct tlb_state cpu_tlbstate[NR_CPUS];
#endif
extern inline void flush_tlb_pgtables(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
flush_tlb_mm(mm);
}
#endif /* _X86_64_PGALLOC_H */
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