This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / powerpc / boot / io.h

diff --git a/arch/powerpc/boot/io.h b/arch/powerpc/boot/io.h
new file mode 100644 (file)
index 0000000..32974ed
--- /dev/null
+++ b/arch/powerpc/boot/io.h
@@ -0,0 +1,53 @@
+#ifndef _IO_H
+#define __IO_H
+/*
+ * Low-level I/O routines.
+ *
+ * Copied from <file:include/asm-powerpc/io.h> (which has no copyright)
+ */
+static inline int in_8(const volatile unsigned char *addr)
+{
+       int ret;
+
+       __asm__ __volatile__("lbz%U1%X1 %0,%1; twi 0,%0,0; isync"
+                            : "=r" (ret) : "m" (*addr));
+       return ret;
+}
+
+static inline void out_8(volatile unsigned char *addr, int val)
+{
+       __asm__ __volatile__("stb%U0%X0 %1,%0; sync"
+                            : "=m" (*addr) : "r" (val));
+}
+
+static inline unsigned in_le32(const volatile unsigned *addr)
+{
+       unsigned ret;
+
+       __asm__ __volatile__("lwbrx %0,0,%1; twi 0,%0,0; isync"
+                            : "=r" (ret) : "r" (addr), "m" (*addr));
+       return ret;
+}
+
+static inline unsigned in_be32(const volatile unsigned *addr)
+{
+       unsigned ret;
+
+       __asm__ __volatile__("lwz%U1%X1 %0,%1; twi 0,%0,0; isync"
+                            : "=r" (ret) : "m" (*addr));
+       return ret;
+}
+
+static inline void out_le32(volatile unsigned *addr, int val)
+{
+       __asm__ __volatile__("stwbrx %1,0,%2; sync" : "=m" (*addr)
+                            : "r" (val), "r" (addr));
+}
+
+static inline void out_be32(volatile unsigned *addr, int val)
+{
+       __asm__ __volatile__("stw%U0%X0 %1,%0; sync"
+                            : "=m" (*addr) : "r" (val));
+}
+
+#endif /* _IO_H */