patch-2.4.10 linux/include/asm-sh/pgalloc.h

• Lines: 176
• Date: Sat Sep 8 12:29:09 2001
• Orig file: v2.4.9/linux/include/asm-sh/pgalloc.h
• Orig date: Tue Jul 3 17:08:21 2001

diff -u --recursive --new-file v2.4.9/linux/include/asm-sh/pgalloc.h linux/include/asm-sh/pgalloc.h
@@ -5,10 +5,10 @@
 #include <linux/threads.h>
 #include <linux/slab.h>
 
-#define pgd_quicklist (current_cpu_data.pgd_quick)
+#define pgd_quicklist ((unsigned long *)0)
 #define pmd_quicklist ((unsigned long *)0)
-#define pte_quicklist (current_cpu_data.pte_quick)
-#define pgtable_cache_size (current_cpu_data.pgtable_cache_sz)
+#define pte_quicklist ((unsigned long *)0)
+#define pgtable_cache_size 0L
 
 #define pmd_populate(mm, pmd, pte) \
 		set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
@@ -17,7 +17,7 @@
  * Allocate and free page tables.
  */
 
-static inline pgd_t *get_pgd_slow(void)
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 {
 	unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
 	pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);
@@ -28,36 +28,14 @@
 	return pgd;
 }
 
-static 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;
-}
-
-static inline void free_pgd_fast(pgd_t *pgd)
-{
-	*(unsigned long *)pgd = (unsigned long) pgd_quicklist;
-	pgd_quicklist = (unsigned long *) pgd;
-	pgtable_cache_size++;
-}
-
-static inline void free_pgd_slow(pgd_t *pgd)
+static inline void pgd_free(pgd_t *pgd)
 {
 	kfree(pgd);
 }
 
 static inline pte_t *pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
-	pte_t *pte;
-
-	pte = (pte_t *) __get_free_page(GFP_KERNEL);
+	pte_t *pte = (pte_t *) __get_free_page(GFP_KERNEL);
 	if (pte)
 		clear_page(pte);
 	return pte;
@@ -65,21 +43,7 @@
 
 static inline pte_t *pte_alloc_one_fast(struct mm_struct *mm, unsigned long address)
 {
-	unsigned long *ret;
-
-	if ((ret = (unsigned long *)pte_quicklist) != NULL) {
-		pte_quicklist = (unsigned long *)(*ret);
-		ret[0] = 0;
-		pgtable_cache_size--;
-	}
-	return (pte_t *)ret;
-}
-
-static inline void pte_free_fast(pte_t *pte)
-{
-	*(unsigned long *)pte = (unsigned long) pte_quicklist;
-	pte_quicklist = (unsigned long *) pte;
-	pgtable_cache_size++;
+	return 0;
 }
 
 static inline void pte_free_slow(pte_t *pte)
@@ -87,9 +51,7 @@
 	free_page((unsigned long)pte);
 }
 
-#define pte_free(pte)		pte_free_fast(pte)
-#define pgd_free(pgd)		free_pgd_fast(pgd)
-#define pgd_alloc(mm)		get_pgd_fast()
+#define pte_free(pte)		pte_free_slow(pte)
 
 /*
  * allocating and freeing a pmd is trivial: the 1-entry pmd is
@@ -106,7 +68,8 @@
 #define pmd_free(x)			do { } while (0)
 #define pgd_populate(mm, pmd, pte)	BUG()
 
-extern int do_check_pgt_cache(int, int);
+/* Do nothing */
+static inline int do_check_pgt_cache(int low, int high) { }
 
 /*
  * TLB flushing:
@@ -125,10 +88,69 @@
 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 void __flush_tlb_page(unsigned long asid, unsigned long page);
 
 static inline void flush_tlb_pgtables(struct mm_struct *mm,
 				      unsigned long start, unsigned long end)
 { /* Nothing to do */
 }
 
+#if defined(__SH4__)
+/*
+ * For SH-4, we have our own implementation for ptep_get_and_clear
+ */
+static inline pte_t ptep_get_and_clear(pte_t *ptep)
+{
+	pte_t pte = *ptep;
+
+	pte_clear(ptep);
+	if (!pte_not_present(pte)) {
+		struct page *page = pte_page(pte);
+		if (VALID_PAGE(page)&&
+		    (!page->mapping || !(page->mapping->i_mmap_shared)))
+			__clear_bit(PG_mapped, &page->flags);
+	}
+	return pte;
+}
+#else
+static inline pte_t ptep_get_and_clear(pte_t *ptep)
+{
+	pte_t pte = *ptep;
+	pte_clear(ptep);
+	return pte;
+}
+#endif
+
+/*
+ * Following functions are same as generic ones.
+ */
+static inline int ptep_test_and_clear_young(pte_t *ptep)
+{
+	pte_t pte = *ptep;
+	if (!pte_young(pte))
+		return 0;
+	set_pte(ptep, pte_mkold(pte));
+	return 1;
+}
+
+static inline int ptep_test_and_clear_dirty(pte_t *ptep)
+{
+	pte_t pte = *ptep;
+	if (!pte_dirty(pte))
+		return 0;
+	set_pte(ptep, pte_mkclean(pte));
+	return 1;
+}
+
+static inline void ptep_set_wrprotect(pte_t *ptep)
+{
+	pte_t old_pte = *ptep;
+	set_pte(ptep, pte_wrprotect(old_pte));
+}
+
+static inline void ptep_mkdirty(pte_t *ptep)
+{
+	pte_t old_pte = *ptep;
+	set_pte(ptep, pte_mkdirty(old_pte));
+}
 #endif /* __ASM_SH_PGALLOC_H */