Initial revision

1 files changed, 43 insertions, 0 deletions

diff --git a/include/asm-ppc/pci_io.h b/include/asm-ppc/pci_io.h
new file mode 100644
index 0000000..0f57b53
--- /dev/null
+++ b/include/asm-ppc/pci_io.h
@@ -0,0 +1,43 @@
+/* originally from linux source (asm-ppc/io.h).
+ * Sanity added by Rob Taylor, Flying Pig Systems, 2000
+ */
+#ifndef _PCI_IO_H_
+#define _PCI_IO_H_
+
+#include "io.h"
+
+
+#define pci_read_le16(addr, dest) \
+    __asm__ __volatile__("lhbrx %0,0,%1" : "=r" (dest) : \
+                  "r" (addr), "m" (*addr));
+
+#define pci_write_le16(addr, val) \
+    __asm__ __volatile__("sthbrx %1,0,%2" : "=m" (*addr) : \
+                  "r" (val), "r" (addr));
+
+
+#define pci_read_le32(addr, dest) \
+    __asm__ __volatile__("lwbrx %0,0,%1" : "=r" (dest) : \
+                 "r" (addr), "m" (*addr));
+
+#define pci_write_le32(addr, val) \
+__asm__ __volatile__("stwbrx %1,0,%2" : "=m" (*addr) : \
+                 "r" (val), "r" (addr));
+
+#define pci_readb(addr,b) ((b) = *(volatile u8 *) (addr))
+#define pci_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
+
+#if !defined(__BIG_ENDIAN)
+#define pci_readw(addr,b) ((b) = *(volatile u16 *) (addr))
+#define pci_readl(addr,b) ((b) = *(volatile u32 *) (addr))
+#define pci_writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
+#define pci_writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
+#else
+#define pci_readw(addr,b) pci_read_le16((volatile u16 *)(addr),(b))
+#define pci_readl(addr,b) pci_read_le32((volatile u32 *)(addr),(b))
+#define pci_writew(b,addr) pci_write_le16((volatile u16 *)(addr),(b))
+#define pci_writel(b,addr) pci_write_le32((volatile u32 *)(addr),(b))
+#endif
+
+
+#endif /* _PCI_IO_H_ */