1 files changed, 115 insertions, 0 deletions

diff --git a/include/asm-alpha/page.h b/include/asm-alpha/page.h
new file mode 100644
index 000000000000..0577daffc720
--- /dev/null
+++ b/include/asm-alpha/page.h
@@ -0,0 +1,115 @@
+#ifndef _ALPHA_PAGE_H
+#define _ALPHA_PAGE_H
+
+#include <linux/config.h>
+#include <asm/pal.h>
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT      13
+#define PAGE_SIZE       (1UL << PAGE_SHIFT)
+#define PAGE_MASK       (~(PAGE_SIZE-1))
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+#define STRICT_MM_TYPECHECKS
+
+extern void clear_page(void *page);
+#define clear_user_page(page, vaddr, pg)        clear_page(page)
+
+#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vmaddr)
+#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+
+extern void copy_page(void * _to, void * _from);
+#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
+
+#ifdef STRICT_MM_TYPECHECKS
+/*
+ * 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) } )
+
+#else
+/*
+ * .. while these make it easier on the compiler
+ */
+typedef unsigned long pte_t;
+typedef unsigned long pmd_t;
+typedef unsigned long pgd_t;
+typedef unsigned long pgprot_t;
+
+#define pte_val(x)      (x)
+#define pmd_val(x)      (x)
+#define pgd_val(x)      (x)
+#define pgprot_val(x)   (x)
+
+#define __pte(x)        (x)
+#define __pgd(x)        (x)
+#define __pgprot(x)     (x)
+
+#endif /* STRICT_MM_TYPECHECKS */
+
+/* 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;
+}
+
+#ifdef USE_48_BIT_KSEG
+#define PAGE_OFFSET             0xffff800000000000UL
+#else
+#define PAGE_OFFSET             0xfffffc0000000000UL
+#endif
+
+#else
+
+#ifdef USE_48_BIT_KSEG
+#define PAGE_OFFSET             0xffff800000000000
+#else
+#define PAGE_OFFSET             0xfffffc0000000000
+#endif
+
+#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))
+#ifndef CONFIG_DISCONTIGMEM
+#define pfn_to_page(pfn)        (mem_map + (pfn))
+#define page_to_pfn(page)       ((unsigned long)((page) - mem_map))
+#define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+
+#define pfn_valid(pfn)          ((pfn) < max_mapnr)
+#define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+#endif /* CONFIG_DISCONTIGMEM */
+
+#define VM_DATA_DEFAULT_FLAGS           (VM_READ | VM_WRITE | VM_EXEC | \
+                                         VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#endif /* __KERNEL__ */
+
+#endif /* _ALPHA_PAGE_H */