1 files changed, 144 insertions, 0 deletions

diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h
new file mode 100644
index 000000000000..4c6d129e7d91
--- /dev/null
+++ b/include/asm-sh/page.h
@@ -0,0 +1,144 @@
+#ifndef __ASM_SH_PAGE_H
+#define __ASM_SH_PAGE_H
+
+/*
+ * Copyright (C) 1999  Niibe Yutaka
+ */
+
+/*
+   [ P0/U0 (virtual) ]          0x00000000     <------ User space
+   [ P1 (fixed)   cached ]      0x80000000     <------ Kernel space
+   [ P2 (fixed)  non-cachable]  0xA0000000     <------ Physical access
+   [ P3 (virtual) cached]       0xC0000000     <------ vmalloced area
+   [ P4 control   ]             0xE0000000
+ */
+
+#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))
+#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
+#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 void (*clear_page)(void *to);
+extern void (*copy_page)(void *to, void *from);
+
+extern void clear_page_slow(void *to);
+extern void copy_page_slow(void *to, void *from);
+
+#if defined(CONFIG_SH7705_CACHE_32KB) && defined(CONFIG_MMU)
+struct page;
+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);
+extern void __clear_user_page(void *to, void *orig_to);
+extern void __copy_user_page(void *to, void *from, void *orig_to);
+#elif defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH3) || !defined(CONFIG_MMU)
+#define clear_user_page(page, vaddr, pg)        clear_page(page)
+#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
+#elif defined(CONFIG_CPU_SH4)
+struct page;
+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);
+extern void __clear_user_page(void *to, void *orig_to);
+extern void __copy_user_page(void *to, void *from, void *orig_to);
+#endif
+
+/*
+ * 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;
+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)
+
+/*
+ * IF YOU CHANGE THIS, PLEASE ALSO CHANGE
+ *
+ *      arch/sh/kernel/vmlinux.lds.S
+ *
+ * which has the same constant encoded..
+ */
+
+#define __MEMORY_START          CONFIG_MEMORY_START
+#define __MEMORY_SIZE           CONFIG_MEMORY_SIZE
+#ifdef CONFIG_DISCONTIGMEM
+/* Just for HP690, for now.. */
+#define __MEMORY_START_2ND      (__MEMORY_START+0x02000000)
+#define __MEMORY_SIZE_2ND       0x001000000 /* 16MB */
+#endif
+
+#define PAGE_OFFSET             (0x80000000UL)
+#define __pa(x)                 ((unsigned long)(x)-PAGE_OFFSET)
+#define __va(x)                 ((void *)((unsigned long)(x)+PAGE_OFFSET))
+
+#define MAP_NR(addr)            (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
+
+#ifndef CONFIG_DISCONTIGMEM
+#define phys_to_page(phys)      (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))
+#define page_to_phys(page)      (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
+#endif
+
+/* 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 */
+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
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_SH_PAGE_H */