diff options
author | Ralf Baechle <ralf@linux-mips.org> | 1999-06-13 16:29:25 +0000 |
---|---|---|
committer | Ralf Baechle <ralf@linux-mips.org> | 1999-06-13 16:29:25 +0000 |
commit | db7d4daea91e105e3859cf461d7e53b9b77454b2 (patch) | |
tree | 9bb65b95440af09e8aca63abe56970dd3360cc57 /include/asm-arm/proc-armo/pgtable.h | |
parent | 9c1c01ead627bdda9211c9abd5b758d6c687d8ac (diff) |
Merge with Linux 2.2.8.
Diffstat (limited to 'include/asm-arm/proc-armo/pgtable.h')
-rw-r--r-- | include/asm-arm/proc-armo/pgtable.h | 55 |
1 files changed, 47 insertions, 8 deletions
diff --git a/include/asm-arm/proc-armo/pgtable.h b/include/asm-arm/proc-armo/pgtable.h index 934902052..04516e729 100644 --- a/include/asm-arm/proc-armo/pgtable.h +++ b/include/asm-arm/proc-armo/pgtable.h @@ -7,9 +7,9 @@ #ifndef __ASM_PROC_PGTABLE_H #define __ASM_PROC_PGTABLE_H -#include <asm/arch/mmu.h> +#include <linux/config.h> #include <linux/slab.h> -#include <asm/arch/processor.h> /* For TASK_SIZE */ +#include <asm/arch/memory.h> /* For TASK_SIZE */ #define LIBRARY_TEXT_START 0x0c000000 @@ -280,13 +280,17 @@ extern __inline__ unsigned long pte_page(pte_t pte) return __phys_to_virt(pte_val(pte) & PAGE_MASK); } -extern __inline__ pmd_t mk_pmd (pte_t *ptep) +extern __inline__ pmd_t mk_pmd(pte_t *ptep) { pmd_t pmd; pmd_val(pmd) = __virt_to_phys((unsigned long)ptep) | _PAGE_TABLE; return pmd; } +/* these are aliases for the above function */ +#define mk_user_pmd(ptep) mk_pmd(ptep) +#define mk_kernel_pmd(ptep) mk_pmd(ptep) + #define set_pmd(pmdp,pmd) ((*(pmdp)) = (pmd)) extern __inline__ unsigned long pmd_page(pmd_t pmd) @@ -319,6 +323,7 @@ extern __inline__ pte_t * pte_offset(pmd_t *dir, unsigned long address) */ #ifndef __SMP__ +#ifndef CONFIG_NO_PGT_CACHE extern struct pgtable_cache_struct { unsigned long *pgd_cache; unsigned long *pte_cache; @@ -329,13 +334,16 @@ extern struct pgtable_cache_struct { #define pte_quicklist (quicklists.pte_cache) #define pgd_quicklist (quicklists.pgd_cache) #define pgtable_cache_size (quicklists.pgtable_cache_sz) +#endif #else #error Pgtable caches have to be per-CPU, so that no locking is needed. #endif extern pgd_t *get_pgd_slow(void); +extern void free_table(void *table); +#ifndef CONFIG_NO_PGT_CACHE extern __inline__ pgd_t *get_pgd_fast(void) { unsigned long *ret; @@ -355,14 +363,17 @@ extern __inline__ void free_pgd_fast(pgd_t *pgd) pgd_quicklist = (unsigned long *) pgd; pgtable_cache_size++; } +#endif +/* keep this as an inline so we get type checking */ extern __inline__ void free_pgd_slow(pgd_t *pgd) { - kfree(pgd); + free_table((void *)pgd); } extern pte_t *get_pte_slow(pmd_t *pmd, unsigned long address_preadjusted); +#ifndef CONFIG_NO_PGT_CACHE extern __inline__ pte_t *get_pte_fast(void) { unsigned long *ret; @@ -381,10 +392,12 @@ extern __inline__ void free_pte_fast(pte_t *pte) pte_quicklist = (unsigned long *) pte; pgtable_cache_size++; } +#endif +/* keep this as an inline so we get type checking */ extern __inline__ void free_pte_slow(pte_t *pte) { - kfree(pte); + free_table((void *)pte); } /* We don't use pmd cache, so this is a dummy routine */ @@ -404,6 +417,26 @@ extern __inline__ void free_pmd_slow(pmd_t *pmd) extern void __bad_pmd(pmd_t *pmd); extern void __bad_pmd_kernel(pmd_t *pmd); +#ifdef CONFIG_NO_PGT_CACHE +#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_slow() + +extern __inline__ pte_t *pte_alloc(pmd_t * pmd, unsigned long address) +{ + address = (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); + + if (pmd_none (*pmd)) { + return get_pte_slow(pmd, address); + } + if (pmd_bad (*pmd)) { + __bad_pmd(pmd); + return NULL; + } + return (pte_t *) pmd_page(*pmd) + address; +} +#else #define pte_free_kernel(pte) free_pte_fast(pte) #define pte_free(pte) free_pte_fast(pte) #define pgd_free(pgd) free_pgd_fast(pgd) @@ -427,6 +460,7 @@ extern __inline__ pte_t *pte_alloc(pmd_t * pmd, unsigned long address) } return (pte_t *) pmd_page(*pmd) + address; } +#endif /* * allocating and freeing a pmd is trivial: the 1-entry pmd is @@ -448,7 +482,6 @@ extern __inline__ pmd_t *pmd_alloc(pgd_t *pgd, unsigned long address) 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) { @@ -457,8 +490,14 @@ extern __inline__ void set_pgdir(unsigned long address, pgd_t entry) *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; +#ifndef CONFIG_NO_PGT_CACHE + { + pgd_t *pgd; + for (pgd = (pgd_t *)pgd_quicklist; pgd; + pgd = (pgd_t *)*(unsigned long *)pgd) + pgd[address >> PGDIR_SHIFT] = entry; + } +#endif } extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; |