This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-sh64 / page.h

diff --git a/include/asm-sh64/page.h b/include/asm-sh64/page.h
new file mode 100644 (file)
index 0000000..e1f7f5a
--- /dev/null
+++ b/include/asm-sh64/page.h
@@ -0,0 +1,137 @@
+#ifndef __ASM_SH64_PAGE_H
+#define __ASM_SH64_PAGE_H
+
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * include/asm-sh64/page.h
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ * Copyright (C) 2003, 2004  Paul Mundt
+ *
+ * benedict.gaster@superh.com 19th, 24th July 2002.
+ *
+ * Modified to take account of enabling for D-CACHE support.
+ *
+ */
+
+#include <linux/config.h>
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT     12
+#ifdef __ASSEMBLY__
+#define PAGE_SIZE      4096
+#else
+#define PAGE_SIZE      (1UL << PAGE_SHIFT)
+#endif
+#define PAGE_MASK      (~(PAGE_SIZE-1))
+#define PTE_MASK       PAGE_MASK
+
+#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
+#define HPAGE_SHIFT    16
+#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
+#define HPAGE_SHIFT    20
+#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512MB)
+#define HPAGE_SHIFT    29
+#endif
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HPAGE_SIZE             (1UL << HPAGE_SHIFT)
+#define HPAGE_MASK             (~(HPAGE_SIZE-1))
+#define HUGETLB_PAGE_ORDER     (HPAGE_SHIFT-PAGE_SHIFT)
+#endif
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+extern struct page *mem_map;
+extern void sh64_page_clear(void *page);
+extern void sh64_page_copy(void *from, void *to);
+
+#define clear_page(page)               sh64_page_clear(page)
+#define copy_page(to,from)             sh64_page_copy(from, to)
+
+#if defined(CONFIG_DCACHE_DISABLED)
+
+#define clear_user_page(page, vaddr, pg)       clear_page(page)
+#define copy_user_page(to, from, vaddr, pg)    copy_page(to, from)
+
+#else
+
+extern void clear_user_page(void *to, unsigned long address, struct page *pg);
+extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
+
+#endif /* defined(CONFIG_DCACHE_DISABLED) */
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct { unsigned long long pte; } pte_t;
+typedef struct { unsigned long pmd; } pmd_t;
+typedef struct { unsigned long pgd; } pgd_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+
+#define pte_val(x)     ((x).pte)
+#define pmd_val(x)     ((x).pmd)
+#define pgd_val(x)     ((x).pgd)
+#define pgprot_val(x)  ((x).pgprot)
+
+#define __pte(x) ((pte_t) { (x) } )
+#define __pmd(x) ((pmd_t) { (x) } )
+#define __pgd(x) ((pgd_t) { (x) } )
+#define __pgprot(x)    ((pgprot_t) { (x) } )
+
+#endif /* !__ASSEMBLY__ */
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)       (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+/*
+ * Kconfig defined.
+ */
+#define __MEMORY_START         (CONFIG_MEMORY_START)
+#define PAGE_OFFSET            (CONFIG_CACHED_MEMORY_OFFSET)
+
+#define __pa(x)                        ((unsigned long)(x)-PAGE_OFFSET)
+#define __va(x)                        ((void *)((unsigned long)(x)+PAGE_OFFSET))
+#define MAP_NR(addr)           ((__pa(addr)-__MEMORY_START) >> PAGE_SHIFT)
+#define VALID_PAGE(page)       ((page - mem_map) < max_mapnr)
+
+#define phys_to_page(phys)     (mem_map + (((phys) - __MEMORY_START) >> PAGE_SHIFT))
+#define page_to_phys(page)     (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
+
+/* PFN start number, because of __MEMORY_START */
+#define PFN_START              (__MEMORY_START >> PAGE_SHIFT)
+
+#define pfn_to_page(pfn)       (mem_map + (pfn) - PFN_START)
+#define page_to_pfn(page)      ((unsigned long)((page) - mem_map) + PFN_START)
+#define virt_to_page(kaddr)    pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_valid(pfn)         (((pfn) - PFN_START) < max_mapnr)
+#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
+#define VM_DATA_DEFAULT_FLAGS  (VM_READ | VM_WRITE | VM_EXEC | \
+                                VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#ifndef __ASSEMBLY__
+
+/* Pure 2^n version of get_order */
+extern __inline__ int get_order(unsigned long size)
+{
+       int order;
+
+       size = (size-1) >> (PAGE_SHIFT-1);
+       order = -1;
+       do {
+               size >>= 1;
+               order++;
+       } while (size);
+       return order;
+}
+
+#endif
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_SH64_PAGE_H */