aboutsummaryrefslogtreecommitdiff
path: root/include/asm-um/io.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-um/io.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-um/io.h')
-rw-r--r--include/asm-um/io.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/include/asm-um/io.h b/include/asm-um/io.h
new file mode 100644
index 00000000000..90674056dce
--- /dev/null
+++ b/include/asm-um/io.h
@@ -0,0 +1,36 @@
+#ifndef __UM_IO_H
+#define __UM_IO_H
+
+#include "asm/page.h"
+
+#define IO_SPACE_LIMIT 0xdeadbeef /* Sure hope nothing uses this */
+
+static inline int inb(unsigned long i) { return(0); }
+static inline void outb(char c, unsigned long i) { }
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ * These are pretty trivial
+ */
+static inline unsigned long virt_to_phys(volatile void * address)
+{
+ return __pa((void *) address);
+}
+
+static inline void * phys_to_virt(unsigned long address)
+{
+ return __va(address);
+}
+
+/*
+ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
+ * access
+ */
+#define xlate_dev_mem_ptr(p) __va(p)
+
+/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
+#define xlate_dev_kmem_ptr(p) p
+
+#endif