1 files changed, 151 insertions, 0 deletions

diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
new file mode 100644
index 000000000000..d1bf8240e73b
--- /dev/null
+++ b/include/asm-mips/page.h
@@ -0,0 +1,151 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_PAGE_H
+#define _ASM_PAGE_H
+
+#include <linux/config.h>
+
+#ifdef __KERNEL__
+
+#include <spaces.h>
+
+#endif
+
+/*
+ * PAGE_SHIFT determines the page size
+ */
+#ifdef CONFIG_PAGE_SIZE_4KB
+#define PAGE_SHIFT      12
+#endif
+#ifdef CONFIG_PAGE_SIZE_8KB
+#define PAGE_SHIFT      13
+#endif
+#ifdef CONFIG_PAGE_SIZE_16KB
+#define PAGE_SHIFT      14
+#endif
+#ifdef CONFIG_PAGE_SIZE_64KB
+#define PAGE_SHIFT      16
+#endif
+#define PAGE_SIZE       (1UL << PAGE_SHIFT)
+#define PAGE_MASK       (~((1 << PAGE_SHIFT) - 1))
+
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+extern void clear_page(void * page);
+extern void copy_page(void * to, void * from);
+
+extern unsigned long shm_align_mask;
+
+static inline unsigned long pages_do_alias(unsigned long addr1,
+        unsigned long addr2)
+{
+        return (addr1 ^ addr2) & shm_align_mask;
+}
+
+struct page;
+
+static inline void clear_user_page(void *addr, unsigned long vaddr,
+        struct page *page)
+{
+        extern void (*flush_data_cache_page)(unsigned long addr);
+
+        clear_page(addr);
+        if (pages_do_alias((unsigned long) addr, vaddr))
+                flush_data_cache_page((unsigned long)addr);
+}
+
+static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+        struct page *to)
+{
+        extern void (*flush_data_cache_page)(unsigned long addr);
+
+        copy_page(vto, vfrom);
+        if (pages_do_alias((unsigned long)vto, vaddr))
+                flush_data_cache_page((unsigned long)vto);
+}
+
+/*
+ * These are used to make use of C type-checking..
+ */
+#ifdef CONFIG_64BIT_PHYS_ADDR
+  #ifdef CONFIG_CPU_MIPS32
+    typedef struct { unsigned long pte_low, pte_high; } pte_t;
+    #define pte_val(x)    ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
+  #else
+     typedef struct { unsigned long long pte; } pte_t;
+     #define pte_val(x) ((x).pte)
+  #endif
+#else
+typedef struct { unsigned long pte; } pte_t;
+#define pte_val(x)      ((x).pte)
+#endif
+
+typedef struct { unsigned long pmd; } pmd_t;
+typedef struct { unsigned long pgd; } pgd_t;
+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 ptep_buddy(x)   ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
+
+#define __pte(x)        ((pte_t) { (x) } )
+#define __pmd(x)        ((pmd_t) { (x) } )
+#define __pgd(x)        ((pgd_t) { (x) } )
+#define __pgprot(x)     ((pgprot_t) { (x) } )
+
+/* 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__ */
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
+
+#define __pa(x)                 ((unsigned long) (x) - PAGE_OFFSET)
+#define __va(x)                 ((void *)((unsigned long) (x) + PAGE_OFFSET))
+
+#define pfn_to_kaddr(pfn)       __va((pfn) << PAGE_SHIFT)
+
+#ifndef CONFIG_DISCONTIGMEM
+#define pfn_to_page(pfn)        (mem_map + (pfn))
+#define page_to_pfn(page)       ((unsigned long)((page) - mem_map))
+#define pfn_valid(pfn)          ((pfn) < max_mapnr)
+#endif
+
+#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 UNCAC_ADDR(addr)        ((addr) - PAGE_OFFSET + UNCAC_BASE)
+#define CAC_ADDR(addr)          ((addr) - UNCAC_BASE + PAGE_OFFSET)
+
+#endif /* defined (__KERNEL__) */
+
+#ifdef CONFIG_LIMITED_DMA
+#define WANT_PAGE_VIRTUAL
+#endif
+
+#endif /* _ASM_PAGE_H */