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authorSrikant Patnaik2015-01-13 15:08:24 +0530
committerSrikant Patnaik2015-01-13 15:08:24 +0530
commit97327692361306d1e6259021bc425e32832fdb50 (patch)
treefe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/m68k/include/asm/virtconvert.h
parent2d05a8f663478a44e088d122e0d62109bbc801d0 (diff)
parenta3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff)
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dirty fix to merging
Diffstat (limited to 'arch/m68k/include/asm/virtconvert.h')
-rw-r--r--arch/m68k/include/asm/virtconvert.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/virtconvert.h b/arch/m68k/include/asm/virtconvert.h
new file mode 100644
index 00000000..f35229b8
--- /dev/null
+++ b/arch/m68k/include/asm/virtconvert.h
@@ -0,0 +1,47 @@
+#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_MMU
+#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) (page_to_pfn(page) << PAGE_SHIFT)
+#endif
+#else
+#define page_to_phys(page) (((page) - mem_map) << 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