1 files changed, 105 insertions, 0 deletions

diff --git a/include/asm-cris/page.h b/include/asm-cris/page.h
new file mode 100644
index 000000000000..ddd8915e41e6
--- /dev/null
+++ b/include/asm-cris/page.h
@@ -0,0 +1,105 @@
+#ifndef _CRIS_PAGE_H
+#define _CRIS_PAGE_H
+
+#include <linux/config.h>
+#include <asm/arch/page.h>
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT      13
+#ifndef __ASSEMBLY__
+#define PAGE_SIZE       (1UL << PAGE_SHIFT)
+#else
+#define PAGE_SIZE       (1 << PAGE_SHIFT)
+#endif
+#define PAGE_MASK       (~(PAGE_SIZE-1))
+
+#ifdef __KERNEL__
+
+#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
+#define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)
+
+#define clear_user_page(page, vaddr, pg)    clear_page(page)
+#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
+
+#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
+#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+
+/*
+ * These are used to make use of C type-checking..
+ */
+#ifndef __ASSEMBLY__
+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;
+#endif
+
+#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) } )
+
+/* On CRIS the PFN numbers doesn't start at 0 so we have to compensate */
+/* for that before indexing into the page table starting at mem_map    */
+#define pfn_to_page(pfn)        (mem_map + ((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)))
+#define page_to_pfn(page)       ((unsigned long)((page) - mem_map) + (PAGE_OFFSET >> PAGE_SHIFT))
+#define pfn_valid(pfn)          (((pfn) - (PAGE_OFFSET >> PAGE_SHIFT)) < max_mapnr)
+
+/* to index into the page map. our pages all start at physical addr PAGE_OFFSET so
+ * we can let the map start there. notice that we subtract PAGE_OFFSET because
+ * we start our mem_map there - in other ports they map mem_map physically and
+ * use __pa instead. in our system both the physical and virtual address of DRAM
+ * is too high to let mem_map start at 0, so we do it this way instead (similar
+ * to arm and m68k I think)
+ */ 
+
+#define virt_to_page(kaddr)    (mem_map + (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT))
+#define VALID_PAGE(page)       (((page) - mem_map) < max_mapnr)
+#define virt_addr_valid(kaddr)  pfn_valid((unsigned)(kaddr) >> PAGE_SHIFT)
+
+/* convert a page (based on mem_map and forward) to a physical address
+ * do this by figuring out the virtual address and then use __pa
+ */
+
+#define page_to_phys(page)     __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+#ifndef __ASSEMBLY__
+
+#define BUG() do { \
+  printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
+} while (0)
+
+#define PAGE_BUG(page) do { \
+         BUG(); \
+} while (0)
+
+/* 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 VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
+                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#endif /* __KERNEL__ */
+
+#endif /* _CRIS_PAGE_H */
+