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#ifndef _MOTOROLA_PGALLOC_H
#define _MOTOROLA_PGALLOC_H
extern struct pgtable_cache_struct {
unsigned long *pmd_cache;
unsigned long *pte_cache;
/* This counts in units of pointer tables, of which can be eight per page. */
unsigned long pgtable_cache_sz;
} quicklists;
#define pgd_quicklist ((unsigned long *)0)
#define pmd_quicklist (quicklists.pmd_cache)
#define pte_quicklist (quicklists.pte_cache)
/* This isn't accurate because of fragmentation of allocated pages for
pointer tables, but that should not be a problem. */
#define pgtable_cache_size ((quicklists.pgtable_cache_sz+7)/8)
extern pte_t *get_pte_slow(pmd_t *pmd, unsigned long offset);
extern pmd_t *get_pmd_slow(pgd_t *pgd, unsigned long offset);
extern pmd_t *get_pointer_table(void);
extern int free_pointer_table(pmd_t *);
extern inline pte_t *get_pte_fast(void)
{
unsigned long *ret;
ret = pte_quicklist;
if (ret) {
pte_quicklist = (unsigned long *)*ret;
ret[0] = 0;
quicklists.pgtable_cache_sz -= 8;
}
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;
quicklists.pgtable_cache_sz += 8;
}
extern inline void free_pte_slow(pte_t *pte)
{
cache_page((unsigned long)pte);
free_page((unsigned long) pte);
}
extern inline pmd_t *get_pmd_fast(void)
{
unsigned long *ret;
ret = pmd_quicklist;
if (ret) {
pmd_quicklist = (unsigned long *)*ret;
ret[0] = 0;
quicklists.pgtable_cache_sz--;
}
return (pmd_t *)ret;
}
extern inline void free_pmd_fast(pmd_t *pmd)
{
*(unsigned long *)pmd = (unsigned long)pmd_quicklist;
pmd_quicklist = (unsigned long *) pmd;
quicklists.pgtable_cache_sz++;
}
extern inline int free_pmd_slow(pmd_t *pmd)
{
return free_pointer_table(pmd);
}
/* The pgd cache is folded into the pmd cache, so these are dummy routines. */
extern inline pgd_t *get_pgd_fast(void)
{
return (pgd_t *)0;
}
extern inline void free_pgd_fast(pgd_t *pgd)
{
}
extern inline void free_pgd_slow(pgd_t *pgd)
{
}
extern void __bad_pte(pmd_t *pmd);
extern void __bad_pmd(pgd_t *pgd);
extern inline void pte_free(pte_t *pte)
{
free_pte_fast(pte);
}
extern inline pte_t *pte_alloc(pmd_t *pmd, unsigned long address)
{
address = (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
if (pmd_none(*pmd)) {
pte_t *page = get_pte_fast();
if (!page)
return get_pte_slow(pmd, address);
pmd_set(pmd,page);
return page + address;
}
if (pmd_bad(*pmd)) {
__bad_pte(pmd);
return NULL;
}
return (pte_t *)__pmd_page(*pmd) + address;
}
extern inline void pmd_free(pmd_t *pmd)
{
free_pmd_fast(pmd);
}
extern inline pmd_t *pmd_alloc(pgd_t *pgd, unsigned long address)
{
address = (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
if (pgd_none(*pgd)) {
pmd_t *page = get_pmd_fast();
if (!page)
return get_pmd_slow(pgd, address);
pgd_set(pgd, page);
return page + address;
}
if (pgd_bad(*pgd)) {
__bad_pmd(pgd);
return NULL;
}
return (pmd_t *)__pgd_page(*pgd) + address;
}
extern inline void pte_free_kernel(pte_t *pte)
{
free_pte_fast(pte);
}
extern inline pte_t *pte_alloc_kernel(pmd_t *pmd, unsigned long address)
{
return pte_alloc(pmd, address);
}
extern inline void pmd_free_kernel(pmd_t *pmd)
{
free_pmd_fast(pmd);
}
extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
{
return pmd_alloc(pgd, address);
}
extern inline void pgd_free(pgd_t *pgd)
{
free_pmd_fast((pmd_t *)pgd);
}
extern inline pgd_t *pgd_alloc(void)
{
pgd_t *pgd = (pgd_t *)get_pmd_fast();
if (!pgd)
pgd = (pgd_t *)get_pointer_table();
return pgd;
}
extern int do_check_pgt_cache(int, int);
extern inline void set_pgdir(unsigned long address, pgd_t entry)
{
}
/*
* flush all user-space atc entries.
*/
static inline void __flush_tlb(void)
{
if (CPU_IS_040_OR_060)
__asm__ __volatile__(".chip 68040\n\t"
"pflushan\n\t"
".chip 68k");
else
__asm__ __volatile__("pflush #0,#4");
}
static inline void __flush_tlb040_one(unsigned long addr)
{
__asm__ __volatile__(".chip 68040\n\t"
"pflush (%0)\n\t"
".chip 68k"
: : "a" (addr));
}
static inline void __flush_tlb_one(unsigned long addr)
{
if (CPU_IS_040_OR_060)
__flush_tlb040_one(addr);
else
__asm__ __volatile__("pflush #0,#4,(%0)" : : "a" (addr));
}
#define flush_tlb() __flush_tlb()
/*
* flush all atc entries (both kernel and user-space entries).
*/
static inline void flush_tlb_all(void)
{
if (CPU_IS_040_OR_060)
__asm__ __volatile__(".chip 68040\n\t"
"pflusha\n\t"
".chip 68k");
else
__asm__ __volatile__("pflusha");
}
static inline void flush_tlb_mm(struct mm_struct *mm)
{
if (mm == current->mm)
__flush_tlb();
}
static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
{
if (vma->vm_mm == current->mm)
__flush_tlb_one(addr);
}
static inline void flush_tlb_range(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
if (mm == current->mm)
__flush_tlb();
}
extern inline void flush_tlb_kernel_page(unsigned long addr)
{
if (CPU_IS_040_OR_060) {
mm_segment_t old_fs = get_fs();
set_fs(KERNEL_DS);
__asm__ __volatile__(".chip 68040\n\t"
"pflush (%0)\n\t"
".chip 68k"
: : "a" (addr));
set_fs(old_fs);
} else
__asm__ __volatile__("pflush #4,#4,(%0)" : : "a" (addr));
}
extern inline void flush_tlb_pgtables(struct mm_struct *mm,
unsigned long start, unsigned long end)
{
}
#endif /* _MOTOROLA_PGALLOC_H */
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