patch-2.3.50 linux/include/asm-sh/pgtable.h

• Lines: 397
• Date: Sun Mar 5 09:33:55 2000
• Orig file: v2.3.49/linux/include/asm-sh/pgtable.h
• Orig date: Thu Mar 2 14:36:23 2000

diff -u --recursive --new-file v2.3.49/linux/include/asm-sh/pgtable.h linux/include/asm-sh/pgtable.h
@@ -13,6 +13,7 @@
 #include <linux/threads.h>
 
 extern pgd_t swapper_pg_dir[1024];
+extern void paging_init(void);
 
 #if defined(__sh3__)
 /* Cache flushing:
@@ -32,6 +33,7 @@
 #define flush_cache_page(vma, vmaddr)		do { } while (0)
 #define flush_page_to_ram(page)			do { } while (0)
 #define flush_icache_range(start, end)		do { } while (0)
+#define flush_icache_page(vma,pg)		do { } while (0)
 #elif defined(__SH4__)
 /*
  *  Caches are broken on SH-4, so we need them.
@@ -41,48 +43,28 @@
 extern void flush_cache_range(struct mm_struct *mm, unsigned long start,
 			      unsigned long end);
 extern void flush_cache_page(struct vm_area_struct *vma, unsigned long addr);
-extern void flush_page_to_ram(unsigned long page);
+extern void __flush_page_to_ram(unsigned long page_va);
+#define flush_page_to_ram(page)	__flush_page_to_ram(page_address(page))
 extern void flush_icache_range(unsigned long start, unsigned long end);
+extern void flush_icache_page(struct vm_area_struct *vma, struct page *pg);
 #endif
 
-/* TLB flushing:
- *
- *  - flush_tlb_all() flushes all processes TLB entries
- *  - flush_tlb_mm(mm) flushes the specified mm context TLB entries
- *  - flush_tlb_page(mm, vmaddr) flushes a single page
- *  - flush_tlb_range(mm, start, end) flushes a range of pages
- */
-extern void flush_tlb_all(void);
-extern void flush_tlb_mm(struct mm_struct *mm);
-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 inline void flush_tlb_pgtables(struct mm_struct *mm,
-				      unsigned long start, unsigned long end)
-{
-}
-
 /*
  * Basically we have the same two-level (which is the logical three level
  * Linux page table layout folded) page tables as the i386.
  */
 
-#endif /* !__ASSEMBLY__ */
+/*
+ * ZERO_PAGE is a global shared page that is always zero: used
+ * for zero-mapped memory areas etc..
+ */
+extern unsigned long empty_zero_page[1024];
+#define ZERO_PAGE(vaddr) (mem_map + MAP_NR(empty_zero_page))
 
-#define pgd_quicklist (current_cpu_data.pgd_quick)
-#define pmd_quicklist ((unsigned long *)0)
-#define pte_quicklist (current_cpu_data.pte_quick)
-#define pgtable_cache_size (current_cpu_data.pgtable_cache_sz)
+#endif /* !__ASSEMBLY__ */
 
 #include <asm/pgtable-2level.h>
 
-/*
- * Certain architectures need to do special things when PTEs
- * within a page table are directly modified.  Thus, the following
- * hook is made available.
- */
-#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
-
 #define __beep() asm("")
 
 #define PMD_SIZE	(1UL << PMD_SHIFT)
@@ -105,10 +87,10 @@
 #define VMALLOC_VMADDR(x) ((unsigned long)(x))
 #define VMALLOC_END	P4SEG
 
-#define _PAGE_READ 	0x001  /* software: read access alowed */
+#define _PAGE_READ 	0x001  /* software: read access allowed */
 #define _PAGE_ACCESSED	0x002  /* software: page referenced */
 #define _PAGE_DIRTY	0x004  /* D-bit   : page changed */
-/*		 	0x008  */
+#define _PAGE_CACHABLE	0x008  /* C-bit   : cachable */
 /*		 	0x010  */
 #define _PAGE_RW	0x020  /* PR0-bit : write access allowed */
 #define _PAGE_USER	0x040  /* PR1-bit : user space access allowed */
@@ -117,26 +99,26 @@
 
 #if defined(__sh3__)
 /* Mask which drop software flags */
-#define _PAGE_FLAGS_HARDWARE_MASK	0x1ffff164
-/* Flags defalult: SZ=1 (4k-byte), C=1 (cachable), SH=0 (not shared) */
-#define _PAGE_FLAGS_HARDWARE_DEFAULT	0x00000018
+#define _PAGE_FLAGS_HARDWARE_MASK	0x1ffff16c
+/* Flags defalult: SZ=1 (4k-byte), C=0 (non-cachable), SH=0 (not shared) */
+#define _PAGE_FLAGS_HARDWARE_DEFAULT	0x00000010
 #elif defined(__SH4__)
 /* Mask which drops software flags */
-#define _PAGE_FLAGS_HARDWARE_MASK	0x1ffff164
-/* Flags defalult: SZ=01 (4k-byte), C=1 (cachable), SH=0 (not shared), WT=0 */
-#define _PAGE_FLAGS_HARDWARE_DEFAULT	0x00000018
+#define _PAGE_FLAGS_HARDWARE_MASK	0x1ffff16c
+/* Flags defalult: SZ=01 (4k-byte), C=0 (non-cachable), SH=0 (not shared), WT=0 */
+#define _PAGE_FLAGS_HARDWARE_DEFAULT	0x00000010
 #endif
 
 #define _PAGE_TABLE	(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
 #define _KERNPG_TABLE	(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
-#define _PAGE_CHG_MASK	(PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
+#define _PAGE_CHG_MASK	(PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | _PAGE_DIRTY)
 
-#define PAGE_NONE	__pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
-#define PAGE_SHARED	__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
-#define PAGE_COPY	__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
-#define PAGE_READONLY	__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
-#define PAGE_KERNEL	__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
-#define PAGE_KERNEL_RO	__pgprot(_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED)
+#define PAGE_NONE	__pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE |_PAGE_ACCESSED)
+#define PAGE_SHARED	__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_CACHABLE |_PAGE_ACCESSED)
+#define PAGE_COPY	__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | _PAGE_ACCESSED)
+#define PAGE_READONLY	__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | _PAGE_ACCESSED)
+#define PAGE_KERNEL	__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_ACCESSED)
+#define PAGE_KERNEL_RO	__pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_ACCESSED)
 
 /*
  * As i386 and MIPS, SuperH can't do page protection for execute, and
@@ -163,23 +145,6 @@
 #define __S111	PAGE_SHARED
 
 /*
- * BAD_PAGETABLE is used when we need a bogus page-table, while
- * BAD_PAGE is used for a bogus page.
- *
- * ZERO_PAGE is a global shared page that is always zero: used
- * for zero-mapped memory areas etc..
- */
-extern pte_t __bad_page(void);
-extern pte_t * __bad_pagetable(void);
-
-/*
- * ZERO_PAGE is a global shared page that is always zero: used
- * for zero-mapped memory areas etc..
- */
-extern unsigned long empty_zero_page[1024];
-#define ZERO_PAGE(vaddr) (mem_map + MAP_NR(empty_zero_page))
-
-/*
  * Handling allocation failures during page table setup.
  */
 extern void __handle_bad_pmd(pmd_t * pmd);
@@ -187,19 +152,19 @@
 
 #define pte_none(x)	(!pte_val(x))
 #define pte_present(x)	(pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
-#define pte_clear(xp)	do { pte_val(*(xp)) = 0; } while (0)
+#define pte_clear(xp)	do { set_pte(xp, __pte(0)); } while (0)
 #define pte_pagenr(x)	((unsigned long)(((pte_val(x) -__MEMORY_START) >> PAGE_SHIFT)))
 
 #define pmd_none(x)	(!pmd_val(x))
-#define	pmd_bad(x)	((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
 #define pmd_present(x)	(pmd_val(x) & _PAGE_PRESENT)
-#define pmd_clear(xp)	do { pmd_val(*(xp)) = 0; } while (0)
+#define pmd_clear(xp)	do { set_pmd(xp, __pmd(0)); } while (0)
+#define	pmd_bad(x)	((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
 
 /*
  * Permanent address of a page. Obviously must never be
  * called on a highmem page.
  */
-#define page_address(page) ({ PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT) + __MEMORY_START; })
+#define page_address(page) ({ if (!(page)->virtual) BUG(); (page)->virtual; })
 #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
 #define pte_page(x) (mem_map+pte_pagenr(x))
 
@@ -212,39 +177,40 @@
 extern inline int pte_dirty(pte_t pte){ return pte_val(pte) & _PAGE_DIRTY; }
 extern inline int pte_young(pte_t pte){ return pte_val(pte) & _PAGE_ACCESSED; }
 extern inline int pte_write(pte_t pte){ return pte_val(pte) & _PAGE_RW; }
-       
-extern inline pte_t pte_rdprotect(pte_t pte){ pte_val(pte) &= ~_PAGE_USER; return pte; }
-extern inline pte_t pte_exprotect(pte_t pte){ pte_val(pte) &= ~_PAGE_USER; return pte; }
-extern inline pte_t pte_mkclean(pte_t pte)	{ pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
-extern inline pte_t pte_mkold(pte_t pte)	{ pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
-extern inline pte_t pte_wrprotect(pte_t pte){ pte_val(pte) &= ~_PAGE_RW; return pte; }
-extern inline pte_t pte_mkread(pte_t pte)	{ pte_val(pte) |= _PAGE_USER; return pte; }
-extern inline pte_t pte_mkexec(pte_t pte)	{ pte_val(pte) |= _PAGE_USER; return pte; }
-extern inline pte_t pte_mkdirty(pte_t pte)	{ pte_val(pte) |= _PAGE_DIRTY; return pte; }
-extern inline pte_t pte_mkyoung(pte_t pte)	{ pte_val(pte) |= _PAGE_ACCESSED; return pte; }
-extern inline pte_t pte_mkwrite(pte_t pte)	{ pte_val(pte) |= _PAGE_RW; return pte; }
+
+extern inline pte_t pte_rdprotect(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
+extern inline pte_t pte_exprotect(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
+extern inline pte_t pte_mkclean(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; }
+extern inline pte_t pte_mkold(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED)); return pte; }
+extern inline pte_t pte_wrprotect(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW)); return pte; }
+extern inline pte_t pte_mkread(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; }
+extern inline pte_t pte_mkexec(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; }
+extern inline pte_t pte_mkdirty(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_DIRTY)); return pte; }
+extern inline pte_t pte_mkyoung(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED)); return pte; }
+extern inline pte_t pte_mkwrite(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_RW)); return pte; }
 
 /*
  * Conversion functions: convert a page and protection to a page entry,
  * and a page entry and page directory to the page they refer to.
+ *
+ * extern pte_t mk_pte(struct page *page, pgprot_t pgprot)
  */
-extern inline pte_t mk_pte(struct page *page, pgprot_t pgprot)
-{
-	pte_t __pte;
-
-	pte_val(__pte) = (page-mem_map)*(unsigned long long)PAGE_SIZE +
-				__MEMORY_START + pgprot_val(pgprot);
-	return __pte;
-}
+#define mk_pte(page,pgprot)						\
+({	pte_t __pte;							\
+									\
+	set_pte(&__pte, __pte(((page)-mem_map) * 			\
+		(unsigned long long)PAGE_SIZE + pgprot_val(pgprot) +	\
+		__MEMORY_START));					\
+	__pte;								\
+})
 
 /* This takes a physical page address that is used by the remapping functions */
 #define mk_pte_phys(physpage, pgprot) \
-({ pte_t __pte; pte_val(__pte) = physpage + pgprot_val(pgprot); __pte; })
+({ pte_t __pte; set_pte(&__pte, __pte(physpage + pgprot_val(pgprot))); __pte; })
 
 extern inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
-{ pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); return pte; }
+{ set_pte(&pte, __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot))); return pte; }
 
-#define page_pte_prot(page,prot) mk_pte(page, prot)
 #define page_pte(page) page_pte_prot(page, __pgprot(0))
 
 #define pmd_page(pmd) \
@@ -266,157 +232,6 @@
 		((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
 #define pte_offset(dir, address) ((pte_t *) pmd_page(*(dir)) + \
 			__pte_offset(address))
-
-/*
- * Allocate and free page tables. The xxx_kernel() versions are
- * used to allocate a kernel page table - this turns on ASN bits
- * if any.
- */
-
-extern __inline__ pgd_t *get_pgd_slow(void)
-{
-	pgd_t *ret = (pgd_t *)__get_free_page(GFP_KERNEL);
-
-	if (ret) {
-		/* Clear User space */
-		memset(ret, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
-
-		/* XXX: Copy vmalloc-ed space??? */
-		memcpy(ret + USER_PTRS_PER_PGD,
-		       swapper_pg_dir + USER_PTRS_PER_PGD,
-		       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
-	}
-	return ret;
-}
-
-extern __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;
-}
-
-extern __inline__ void free_pgd_fast(pgd_t *pgd)
-{
-	*(unsigned long *)pgd = (unsigned long) pgd_quicklist;
-	pgd_quicklist = (unsigned long *) pgd;
-	pgtable_cache_size++;
-}
-
-extern __inline__ void free_pgd_slow(pgd_t *pgd)
-{
-	free_page((unsigned long)pgd);
-}
-
-extern pte_t *get_pte_slow(pmd_t *pmd, unsigned long address_preadjusted);
-extern pte_t *get_pte_kernel_slow(pmd_t *pmd, unsigned long address_preadjusted);
-
-extern __inline__ pte_t *get_pte_fast(void)
-{
-	unsigned long *ret;
-
-	if((ret = (unsigned long *)pte_quicklist) != NULL) {
-		pte_quicklist = (unsigned long *)(*ret);
-		ret[0] = ret[1];
-		pgtable_cache_size--;
-	}
-	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;
-	pgtable_cache_size++;
-}
-
-extern __inline__ void free_pte_slow(pte_t *pte)
-{
-	free_page((unsigned long)pte);
-}
-
-#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_fast()
-
-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);
-		pmd_val(*pmd) = _KERNPG_TABLE + __pa(page);
-		return page + address;
-	}
-	if (pmd_bad(*pmd)) {
-		__handle_bad_pmd_kernel(pmd);
-		return NULL;
-	}
-	return (pte_t *) pmd_page(*pmd) + address;
-}
-
-extern __inline__ pte_t * pte_alloc(pmd_t * pmd, unsigned long address)
-{
-	address = (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
-
-	if (pmd_none(*pmd))
-		goto getnew;
-	if (pmd_bad(*pmd))
-		goto fix;
-	return (pte_t *)pmd_page(*pmd) + address;
-getnew:
-{
-	unsigned long page = (unsigned long) get_pte_fast();
-	
-	if (!page)
-		return get_pte_slow(pmd, address);
-	pmd_val(*pmd) = _PAGE_TABLE + __pa(page);
-	return (pte_t *)page + address;
-}
-fix:
-	__handle_bad_pmd(pmd);
-	return NULL;
-}
-
-/*
- * allocating and freeing a pmd is trivial: the 1-entry pmd is
- * inside the pgd, so has no extra memory associated with it.
- */
-extern inline void pmd_free(pmd_t * pmd)
-{
-}
-
-#define pmd_free_kernel		pmd_free
-#define pmd_alloc_kernel	pmd_alloc
-
-extern int do_check_pgt_cache(int, int);
-
-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) {
-		if (!p->mm)
-			continue;
-		*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;
-}
-
-extern pgd_t swapper_pg_dir[1024];
 
 extern void update_mmu_cache(struct vm_area_struct * vma,
 			     unsigned long address, pte_t pte);