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#ifndef __ASM_SH_PGALLOC_H
#define __ASM_SH_PGALLOC_H
#include <asm/processor.h>
#include <linux/threads.h>
#define pgd_quicklist (current_cpu_data.pgd_quick)
#define pmd_quicklist ((unsigned long *)0)
#define pte_quicklist (current_cpu_data.pte_quick)
#define pgtable_cache_size (current_cpu_data.pgtable_cache_sz)
#include <asm/pgalloc-2level.h>
/*
* Allocate and free page tables. The xxx_kernel() versions are
* used to allocate a kernel page table - this turns on ASN bits
* if any.
*/
extern __inline__ pgd_t *get_pgd_slow(void)
{
pgd_t *ret = (pgd_t *)__get_free_page(GFP_KERNEL);
if (ret) {
memset(ret, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
memcpy(ret + USER_PTRS_PER_PGD, swapper_pg_dir + USER_PTRS_PER_PGD, (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
}
return ret;
}
extern __inline__ pgd_t *get_pgd_fast(void)
{
unsigned long *ret;
if ((ret = pgd_quicklist) != NULL) {
pgd_quicklist = (unsigned long *)(*ret);
ret[0] = 0;
pgtable_cache_size--;
} else
ret = (unsigned long *)get_pgd_slow();
return (pgd_t *)ret;
}
extern __inline__ void free_pgd_fast(pgd_t *pgd)
{
*(unsigned long *)pgd = (unsigned long) pgd_quicklist;
pgd_quicklist = (unsigned long *) pgd;
pgtable_cache_size++;
}
extern __inline__ void free_pgd_slow(pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
extern pte_t *get_pte_slow(pmd_t *pmd, unsigned long address_preadjusted);
extern pte_t *get_pte_kernel_slow(pmd_t *pmd, unsigned long address_preadjusted);
extern __inline__ pte_t *get_pte_fast(void)
{
unsigned long *ret;
if((ret = (unsigned long *)pte_quicklist) != NULL) {
pte_quicklist = (unsigned long *)(*ret);
ret[0] = ret[1];
pgtable_cache_size--;
}
return (pte_t *)ret;
}
extern __inline__ void free_pte_fast(pte_t *pte)
{
*(unsigned long *)pte = (unsigned long) pte_quicklist;
pte_quicklist = (unsigned long *) pte;
pgtable_cache_size++;
}
extern __inline__ void free_pte_slow(pte_t *pte)
{
free_page((unsigned long)pte);
}
#define pte_free_kernel(pte) free_pte_slow(pte)
#define pte_free(pte) free_pte_slow(pte)
#define pgd_free(pgd) free_pgd_slow(pgd)
#define pgd_alloc() get_pgd_fast()
extern inline pte_t * pte_alloc_kernel(pmd_t * pmd, unsigned long address)
{
if (!pmd)
BUG();
address = (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
if (pmd_none(*pmd)) {
pte_t * page = (pte_t *) get_pte_fast();
if (!page)
return get_pte_kernel_slow(pmd, address);
set_pmd(pmd, __pmd(_KERNPG_TABLE + __pa(page)));
return page + address;
}
if (pmd_bad(*pmd)) {
__handle_bad_pmd_kernel(pmd);
return NULL;
}
return (pte_t *) pmd_page(*pmd) + address;
}
extern inline pte_t * pte_alloc(pmd_t * pmd, unsigned long address)
{
address = (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
if (pmd_none(*pmd))
goto getnew;
if (pmd_bad(*pmd))
goto fix;
return (pte_t *)pmd_page(*pmd) + address;
getnew:
{
unsigned long page = (unsigned long) get_pte_fast();
if (!page)
return get_pte_slow(pmd, address);
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(page)));
return (pte_t *)page + address;
}
fix:
__handle_bad_pmd(pmd);
return NULL;
}
/*
* allocating and freeing a pmd is trivial: the 1-entry pmd is
* inside the pgd, so has no extra memory associated with it.
*/
extern inline void pmd_free(pmd_t * pmd)
{
}
#define pmd_free_kernel pmd_free
#define pmd_alloc_kernel pmd_alloc
extern int do_check_pgt_cache(int, int);
extern inline void set_pgdir(unsigned long address, pgd_t entry)
{
struct task_struct * p;
pgd_t *pgd;
read_lock(&tasklist_lock);
for_each_task(p) {
if (!p->mm)
continue;
*pgd_offset(p->mm,address) = entry;
}
read_unlock(&tasklist_lock);
for (pgd = (pgd_t *)pgd_quicklist; pgd; pgd = (pgd_t *)*(unsigned long *)pgd)
pgd[address >> PGDIR_SHIFT] = entry;
}
/*
* 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
*
*/
extern void flush_tlb(void);
extern void flush_tlb_all(void);
extern void flush_tlb_mm(struct mm_struct *mm);
extern void flush_tlb_range(struct mm_struct *mm, unsigned long start,
unsigned long end);
extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
extern inline void flush_tlb_pgtables(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
}
#endif /* __ASM_SH_PGALLOC_H */
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