1 files changed, 89 insertions, 0 deletions

diff --git a/include/asm-blackfin/page.h b/include/asm-blackfin/page.h
new file mode 100644
index 000000000000..ffad947f1b2a
--- /dev/null
+++ b/include/asm-blackfin/page.h
@@ -0,0 +1,89 @@
+#ifndef _BLACKFIN_PAGE_H
+#define _BLACKFIN_PAGE_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__
+
+#include <asm/setup.h>
+
+#ifndef __ASSEMBLY__
+
+#define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
+#define free_user_page(page, addr)      free_page(addr)
+
+#define clear_page(page)        memset((page), 0, PAGE_SIZE)
+#define copy_page(to,from)      memcpy((to), (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)
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct {
+        unsigned long pte;
+} pte_t;
+typedef struct {
+        unsigned long pmd[16];
+} 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[0])
+#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) } )
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+extern unsigned long memory_start;
+extern unsigned long memory_end;
+
+#endif                          /* !__ASSEMBLY__ */
+
+#include <asm/page_offset.h>
+#include <asm/io.h>
+
+#define PAGE_OFFSET             (PAGE_OFFSET_RAW)
+
+#ifndef __ASSEMBLY__
+
+#define __pa(vaddr)             virt_to_phys((void *)(vaddr))
+#define __va(paddr)             phys_to_virt((unsigned long)(paddr))
+
+#define MAP_NR(addr)            (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
+
+#define virt_to_pfn(kaddr)      (__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_virt(pfn)        __va((pfn) << PAGE_SHIFT)
+#define virt_to_page(addr)      (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
+#define page_to_virt(page)      ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
+#define VALID_PAGE(page)        ((page - mem_map) < max_mapnr)
+
+#define pfn_to_page(pfn)        virt_to_page(pfn_to_virt(pfn))
+#define page_to_pfn(page)       virt_to_pfn(page_to_virt(page))
+#define pfn_valid(pfn)          ((pfn) < max_mapnr)
+
+#define virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
+                                ((void *)(kaddr) < (void *)memory_end))
+
+#include <asm-generic/page.h>
+
+#endif                          /* __ASSEMBLY__ */
+#endif                          /* __KERNEL__ */
+
+#endif                          /* _BLACKFIN_PAGE_H */