1 files changed, 76 insertions, 0 deletions

diff --git a/include/asm-m68k/virtconvert.h b/include/asm-m68k/virtconvert.h
new file mode 100644
index 000000000000..8c4e8037b898
--- /dev/null
+++ b/include/asm-m68k/virtconvert.h
@@ -0,0 +1,76 @@
+#ifndef __VIRT_CONVERT__
+#define __VIRT_CONVERT__
+
+/*
+ * Macros used for converting between virtual and physical mappings.
+ */
+
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+#include <linux/compiler.h>
+#include <asm/setup.h>
+#include <asm/page.h>
+
+#ifdef CONFIG_AMIGA
+#include <asm/amigahw.h>
+#endif
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ */
+#ifndef CONFIG_SUN3
+extern unsigned long mm_vtop(unsigned long addr) __attribute_const__;
+extern unsigned long mm_ptov(unsigned long addr) __attribute_const__;
+#else
+static inline unsigned long mm_vtop(unsigned long vaddr)
+{
+        return __pa(vaddr);
+}
+
+static inline unsigned long mm_ptov(unsigned long paddr)
+{
+        return (unsigned long)__va(paddr);
+}
+#endif
+
+#ifdef CONFIG_SINGLE_MEMORY_CHUNK
+static inline unsigned long virt_to_phys(void *vaddr)
+{
+        return (unsigned long)vaddr - PAGE_OFFSET + m68k_memory[0].addr;
+}
+
+static inline void * phys_to_virt(unsigned long paddr)
+{
+        return (void *)(paddr - m68k_memory[0].addr + PAGE_OFFSET);
+}
+#else
+static inline unsigned long virt_to_phys(void *address)
+{
+        return mm_vtop((unsigned long)address);
+}
+
+static inline void *phys_to_virt(unsigned long address)
+{
+        return (void *) mm_ptov(address);
+}
+#endif
+
+/* Permanent address of a page. */
+#define __page_address(page)    (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
+#define page_to_phys(page)      virt_to_phys((void *)__page_address(page))
+
+/*
+ * IO bus memory addresses are 1:1 with the physical address,
+ * except on the PCI bus of the Hades.
+ */
+#ifdef CONFIG_HADES
+#define virt_to_bus(a) (virt_to_phys(a) + (MACH_IS_HADES ? 0x80000000 : 0))
+#define bus_to_virt(a) (phys_to_virt((a) - (MACH_IS_HADES ? 0x80000000 : 0)))
+#else
+#define virt_to_bus virt_to_phys
+#define bus_to_virt phys_to_virt
+#endif
+
+#endif
+#endif