patch-2.4.22 linux-2.4.22/include/asm-sh64/page.h

• Lines: 130
• Date: 2003-08-25 04:44:44.000000000 -0700
• Orig file: linux-2.4.21/include/asm-sh64/page.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/include/asm-sh64/page.h linux-2.4.22/include/asm-sh64/page.h
@@ -0,0 +1,129 @@
+#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  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
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+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)	clear_page(page)
+#define copy_user_page(to, from, vaddr)	copy_page(to, from)
+
+#else
+
+extern void clear_user_page(void *to, unsigned long address);
+extern void copy_user_page(void *to, void *from, unsigned long address);
+
+#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)
+
+/*
+ * config.in 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 virt_to_page(kaddr)  (mem_map + MAP_NR(kaddr))
+#define page_to_phys(page)	(((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
+
+
+#ifndef __ASSEMBLY__
+
+
+/*
+ * Tell the user there is some problem.
+ */
+#define BUG() do { \
+	printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
+	asm volatile("nop"); \
+} while (0)
+
+#define PAGE_BUG(page) do { \
+	BUG(); \
+} while (0)
+
+/* 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;
+}
+
+
+#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
+                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#endif
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_SH64_PAGE_H */