patch-2.4.4 linux/include/asm-arm/pgalloc.h
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- Lines: 186
- Date:
Thu Apr 12 12:20:31 2001
- Orig file:
v2.4.3/linux/include/asm-arm/pgalloc.h
- Orig date:
Mon Sep 18 15:15:24 2000
diff -u --recursive --new-file v2.4.3/linux/include/asm-arm/pgalloc.h linux/include/asm-arm/pgalloc.h
@@ -1,7 +1,7 @@
/*
* linux/include/asm-arm/pgalloc.h
*
- * Copyright (C) 2000 Russell King
+ * Copyright (C) 2000-2001 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -25,6 +25,11 @@
#define flush_tlb_pgtables(mm,start,end) do { } while (0)
/*
+ * Processor specific parts...
+ */
+#include <asm/proc/pgalloc.h>
+
+/*
* Page table cache stuff
*/
#ifndef CONFIG_NO_PGT_CACHE
@@ -68,20 +73,13 @@
pgtable_cache_size++;
}
-/* We don't use pmd cache, so this is a dummy routine */
-#define get_pmd_fast() ((pmd_t *)0)
-
-extern __inline__ void free_pmd_fast(pmd_t *pmd)
-{
-}
-
-extern __inline__ pte_t *get_pte_fast(void)
+static inline pte_t *pte_alloc_one_fast(struct mm_struct *mm, unsigned long address)
{
unsigned long *ret;
if((ret = pte_quicklist) != NULL) {
pte_quicklist = (unsigned long *)__pte_next(ret);
- ret[0] = ret[1];
+ ret[0] = 0;
clean_dcache_entry(ret);
pgtable_cache_size--;
}
@@ -97,119 +95,47 @@
#else /* CONFIG_NO_PGT_CACHE */
-#define pgd_quicklist ((unsigned long *)0)
-#define pmd_quicklist ((unsigned long *)0)
-#define pte_quicklist ((unsigned long *)0)
+#define pgd_quicklist ((unsigned long *)0)
+#define pmd_quicklist ((unsigned long *)0)
+#define pte_quicklist ((unsigned long *)0)
-#define get_pgd_fast() ((pgd_t *)0)
-#define get_pmd_fast() ((pmd_t *)0)
-#define get_pte_fast() ((pte_t *)0)
-
-#define free_pgd_fast(pgd) free_pgd_slow(pgd)
-#define free_pmd_fast(pmd) free_pmd_slow(pmd)
-#define free_pte_fast(pte) free_pte_slow(pte)
+#define get_pgd_fast() ((pgd_t *)0)
+#define pte_alloc_one_fast(mm,addr) ((pte_t *)0)
-#endif /* CONFIG_NO_PGT_CACHE */
+#define free_pgd_fast(pgd) free_pgd_slow(pgd)
+#define free_pte_fast(pte) pte_free_slow(pte)
-extern pgd_t *get_pgd_slow(void);
-extern void free_pgd_slow(pgd_t *pgd);
+#endif /* CONFIG_NO_PGT_CACHE */
-#define free_pmd_slow(pmd) do { } while (0)
+#define pte_free(pte) free_pte_fast(pte)
-extern pte_t *get_pte_kernel_slow(pmd_t *pmd, unsigned long addr_preadjusted);
-extern pte_t *get_pte_slow(pmd_t *pmd, unsigned long addr_preadjusted);
-extern void free_pte_slow(pte_t *pte);
/*
- * Allocate and free page tables. The xxx_kernel() versions are
- * used to allocate a kernel page table - this turns on ASN bits
- * if any.
+ * Since we have only two-level page tables, these are trivial
*/
-#define pte_free_kernel(pte) free_pte_fast(pte)
-#define pte_free(pte) free_pte_fast(pte)
+#define pmd_alloc_one_fast(mm,addr) ({ BUG(); ((pmd_t *)1); })
+#define pmd_alloc_one(mm,addr) ({ BUG(); ((pmd_t *)2); })
+#define pmd_free_slow(pmd) do { } while (0)
+#define pmd_free_fast(pmd) do { } while (0)
+#define pmd_free(pmd) do { } while (0)
+#define pgd_populate(mm,pmd,pte) BUG()
-#ifndef pte_alloc_kernel
-extern __inline__ pte_t * pte_alloc_kernel(pmd_t *pmd, unsigned long address)
-{
- 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, mk_kernel_pmd(page));
- return page + address;
- }
- if (pmd_bad(*pmd)) {
- __handle_bad_pmd_kernel(pmd);
- return NULL;
- }
- return (pte_t *) pmd_page(*pmd) + address;
-}
-#endif
-
-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 = (pte_t *) get_pte_fast();
-
- if (!page)
- return get_pte_slow(pmd, address);
- set_pmd(pmd, mk_user_pmd(page));
- return page + address;
- }
- if (pmd_bad(*pmd)) {
- __handle_bad_pmd(pmd);
- return NULL;
- }
- return (pte_t *) pmd_page(*pmd) + address;
-}
-
-#define pmd_free_kernel pmd_free
-#define pmd_free(pmd) do { } while (0)
-
-#define pmd_alloc_kernel pmd_alloc
-extern __inline__ pmd_t *pmd_alloc(pgd_t *pgd, unsigned long address)
-{
- return (pmd_t *) pgd;
-}
-
-#define pgd_free(pgd) free_pgd_fast(pgd)
+extern pgd_t *get_pgd_slow(struct mm_struct *mm);
+extern void free_pgd_slow(pgd_t *pgd);
-extern __inline__ pgd_t *pgd_alloc(void)
+extern __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *pgd;
pgd = get_pgd_fast();
if (!pgd)
- pgd = get_pgd_slow();
+ pgd = get_pgd_slow(mm);
return pgd;
}
-extern int do_check_pgt_cache(int, int);
+#define pgd_free(pgd) free_pgd_fast(pgd)
-extern __inline__ void set_pgdir(unsigned long address, pgd_t entry)
-{
- struct task_struct * p;
-
- read_lock(&tasklist_lock);
- for_each_task(p) {
- if (!p->mm)
- continue;
- *pgd_offset(p->mm,address) = entry;
- }
- read_unlock(&tasklist_lock);
-
-#ifndef CONFIG_NO_PGT_CACHE
- {
- pgd_t *pgd;
- for (pgd = (pgd_t *)pgd_quicklist; pgd;
- pgd = (pgd_t *)__pgd_next(pgd))
- pgd[address >> PGDIR_SHIFT] = entry;
- }
-#endif
-}
+extern int do_check_pgt_cache(int, int);
#endif
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