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

[linux-2.6.git] / include / asm-m32r / page.h

diff --git a/include/asm-m32r/page.h b/include/asm-m32r/page.h
new file mode 100644 (file)
index 0000000..ea2d1f9
--- /dev/null
+++ b/include/asm-m32r/page.h
@@ -0,0 +1,112 @@
+#ifndef _ASM_M32R_PAGE_H
+#define _ASM_M32R_PAGE_H
+
+#include <linux/config.h>
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT     12
+#define PAGE_SIZE      (1UL << PAGE_SHIFT)
+#define PAGE_MASK      (~(PAGE_SIZE-1))
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+extern void clear_page(void *to);
+extern void copy_page(void *to, void *from);
+
+#define clear_user_page(page, vaddr, pg)       clear_page(page)
+#define copy_user_page(to, from, vaddr, pg)    copy_page(to, from)
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pmd; } pmd_t;
+typedef struct { unsigned long pgd; } pgd_t;
+#define pte_val(x)     ((x).pte)
+#define PTE_MASK       PAGE_MASK
+
+typedef struct { unsigned long pgprot; } pgprot_t;
+
+#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)
+
+/*
+ * This handles the memory map.. We could make this a config
+ * option, but too many people screw it up, and too few need
+ * it.
+ *
+ * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
+ * a virtual address space of one gigabyte, which limits the
+ * amount of physical memory you can use to about 950MB.
+ *
+ * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
+ * and CONFIG_HIGHMEM64G options in the kernel configuration.
+ */
+
+
+/* This handles the memory map.. */
+
+#ifndef __ASSEMBLY__
+
+/* Pure 2^n version of get_order */
+static __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 /* __ASSEMBLY__ */
+
+#define __MEMORY_START  CONFIG_MEMORY_START
+#define __MEMORY_SIZE   CONFIG_MEMORY_SIZE
+
+#ifdef CONFIG_MMU
+#define __PAGE_OFFSET  (0x80000000)
+#else
+#define __PAGE_OFFSET  (0x00000000)
+#endif
+
+#define PAGE_OFFSET            ((unsigned long)__PAGE_OFFSET)
+#define __pa(x)                        ((unsigned long)(x) - PAGE_OFFSET)
+#define __va(x)                        ((void *)((unsigned long)(x) + PAGE_OFFSET))
+
+#ifndef CONFIG_DISCONTIGMEM
+#define PFN_BASE               (CONFIG_MEMORY_START >> PAGE_SHIFT)
+#define pfn_to_page(pfn)       (mem_map + ((pfn) - PFN_BASE))
+#define page_to_pfn(page)      \
+       ((unsigned long)((page) - mem_map) + PFN_BASE)
+#define pfn_valid(pfn)         (((pfn) - PFN_BASE) < max_mapnr)
+#endif  /* !CONFIG_DISCONTIGMEM */
+
+#define virt_to_page(kaddr)    pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#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 )
+
+#define devmem_is_allowed(x) 1
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_M32R_PAGE_H */
+