1 files changed, 36 insertions, 0 deletions

diff --git a/arch/x86/include/asm/page_64.h b/arch/x86/include/asm/page_64.h
index 072694ed81a5..0f1ddee6a0ce 100644
--- a/arch/x86/include/asm/page_64.h
+++ b/arch/x86/include/asm/page_64.h
@@ -3,4 +3,40 @@
 
 #include <asm/page_64_types.h>
 
+#ifndef __ASSEMBLY__
+
+/* duplicated to the one in bootmem.h */
+extern unsigned long max_pfn;
+extern unsigned long phys_base;
+
+static inline unsigned long __phys_addr_nodebug(unsigned long x)
+{
+        unsigned long y = x - __START_KERNEL_map;
+
+        /* use the carry flag to determine if x was < __START_KERNEL_map */
+        x = y + ((x > y) ? phys_base : (__START_KERNEL_map - PAGE_OFFSET));
+
+        return x;
+}
+
+#ifdef CONFIG_DEBUG_VIRTUAL
+extern unsigned long __phys_addr(unsigned long);
+extern unsigned long __phys_addr_symbol(unsigned long);
+#else
+#define __phys_addr(x)          __phys_addr_nodebug(x)
+#define __phys_addr_symbol(x) \
+        ((unsigned long)(x) - __START_KERNEL_map + phys_base)
+#endif
+
+#define __phys_reloc_hide(x)    (x)
+
+#ifdef CONFIG_FLATMEM
+#define pfn_valid(pfn)          ((pfn) < max_pfn)
+#endif
+
+void clear_page(void *page);
+void copy_page(void *to, void *from);
+
+#endif  /* !__ASSEMBLY__ */
+
 #endif /* _ASM_X86_PAGE_64_H */