Merge branch 'linus' into core/iommu

1 files changed, 48 insertions, 0 deletions

diff --git a/arch/m68k/include/asm/virtconvert.h b/arch/m68k/include/asm/virtconvert.h
new file mode 100644
index 00000000000..22ab05c9c52
--- /dev/null
+++ b/arch/m68k/include/asm/virtconvert.h
@@ -0,0 +1,48 @@
+#ifndef __VIRT_CONVERT__
+#define __VIRT_CONVERT__
+
+/*
+ * Macros used for converting between virtual and physical mappings.
+ */
+
+#ifdef __KERNEL__
+
+#include <linux/compiler.h>
+#include <linux/mmzone.h>
+#include <asm/setup.h>
+#include <asm/page.h>
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ */
+static inline unsigned long virt_to_phys(void *address)
+{
+	return __pa(address);
+}
+
+static inline void *phys_to_virt(unsigned long address)
+{
+	return __va(address);
+}
+
+/* Permanent address of a page. */
+#ifdef CONFIG_SINGLE_MEMORY_CHUNK
+#define page_to_phys(page) \
+	__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
+#else
+#define page_to_phys(_page) ({						\
+	struct page *__page = _page;					\
+	struct pglist_data *pgdat;					\
+	pgdat = pg_data_table[page_to_nid(__page)];			\
+	page_to_pfn(__page) << PAGE_SHIFT;				\
+})
+#endif
+
+/*
+ * IO bus memory addresses are 1:1 with the physical address,
+ */
+#define virt_to_bus virt_to_phys
+#define bus_to_virt phys_to_virt
+
+#endif
+#endif