diff options
Diffstat (limited to 'include/asm-m68k/pgalloc.h')
| -rw-r--r-- | include/asm-m68k/pgalloc.h | 263 |
1 files changed, 11 insertions, 252 deletions
diff --git a/include/asm-m68k/pgalloc.h b/include/asm-m68k/pgalloc.h index 028b7c40e..9f307b343 100644 --- a/include/asm-m68k/pgalloc.h +++ b/include/asm-m68k/pgalloc.h @@ -1,183 +1,11 @@ -#ifndef _M68K_PGALLOC_H -#define _M68K_PGALLOC_H +#ifndef M68K_PGALLOC_H +#define M68K_PGALLOC_H + +#include <linux/config.h> #include <asm/setup.h> #include <asm/virtconvert.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) -{ -} - - /* * Cache handling functions */ @@ -325,82 +153,13 @@ extern inline void flush_icache_range (unsigned long address, } } +#define flush_icache_page(vma,pg) do { } while (0) -/* - * 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_tlb_one(unsigned long addr) -{ - if (CPU_IS_040_OR_060) { - __asm__ __volatile__(".chip 68040\n\t" - "pflush (%0)\n\t" - ".chip 68k" - : : "a" (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) -{ -} +#ifdef CONFIG_SUN3 +#include <asm/sun3_pgalloc.h> +#else +#include <asm/motorola_pgalloc.h> +#endif -#endif /* _M68K_PGALLOC_H */ +#endif /* M68K_PGALLOC_H */ |