Initial revision

1 files changed, 180 insertions, 0 deletions

diff --git a/include/asm-ppc/io.h b/include/asm-ppc/io.h
new file mode 100644
index 0000000..652b12b
--- /dev/null
+++ b/include/asm-ppc/io.h
@@ -0,0 +1,180 @@
+/* originally from linux source.
+ * removed the dependencies on CONFIG_ values
+ * removed virt_to_phys stuff (and in fact everything surrounded by #if __KERNEL__)
+ * Modified By Rob Taylor, Flying Pig Systems, 2000
+ */
+
+#ifndef _PPC_IO_H
+#define _PPC_IO_H
+
+#include <linux/config.h>
+#include <asm/byteorder.h>
+
+#define SIO_CONFIG_RA   0x398
+#define SIO_CONFIG_RD   0x399
+
+
+#define readb(addr) in_8((volatile u8 *)(addr))
+#define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
+#if !defined(__BIG_ENDIAN)
+#define readw(addr) (*(volatile u16 *) (addr))
+#define readl(addr) (*(volatile u32 *) (addr))
+#define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
+#define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
+#else
+#define readw(addr) in_le16((volatile u16 *)(addr))
+#define readl(addr) in_le32((volatile u32 *)(addr))
+#define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
+#define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
+#endif
+
+/*
+ * The insw/outsw/insl/outsl macros don't do byte-swapping.
+ * They are only used in practice for transferring buffers which
+ * are arrays of bytes, and byte-swapping is not appropriate in
+ * that case.  - paulus
+ */
+#define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
+#define outsb(port, buf, ns)    _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
+#define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
+#define outsw(port, buf, ns)    _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
+#define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
+#define outsl(port, buf, nl)    _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
+
+#define inb(port)       in_8((u8 *)((port)+_IO_BASE))
+#define outb(val, port)     out_8((u8 *)((port)+_IO_BASE), (val))
+#if !defined(__BIG_ENDIAN)
+#define inw(port)       in_be16((u16 *)((port)+_IO_BASE))
+#define outw(val, port)     out_be16((u16 *)((port)+_IO_BASE), (val))
+#define inl(port)       in_be32((u32 *)((port)+_IO_BASE))
+#define outl(val, port)     out_be32((u32 *)((port)+_IO_BASE), (val))
+#else
+#define inw(port)       in_le16((u16 *)((port)+_IO_BASE))
+#define outw(val, port)     out_le16((u16 *)((port)+_IO_BASE), (val))
+#define inl(port)       in_le32((u32 *)((port)+_IO_BASE))
+#define outl(val, port)     out_le32((u32 *)((port)+_IO_BASE), (val))
+#endif
+
+#define inb_p(port)     in_8((u8 *)((port)+_IO_BASE))
+#define outb_p(val, port)   out_8((u8 *)((port)+_IO_BASE), (val))
+#define inw_p(port)     in_le16((u16 *)((port)+_IO_BASE))
+#define outw_p(val, port)   out_le16((u16 *)((port)+_IO_BASE), (val))
+#define inl_p(port)     in_le32((u32 *)((port)+_IO_BASE))
+#define outl_p(val, port)   out_le32((u32 *)((port)+_IO_BASE), (val))
+
+extern void _insb(volatile u8 *port, void *buf, int ns);
+extern void _outsb(volatile u8 *port, const void *buf, int ns);
+extern void _insw(volatile u16 *port, void *buf, int ns);
+extern void _outsw(volatile u16 *port, const void *buf, int ns);
+extern void _insl(volatile u32 *port, void *buf, int nl);
+extern void _outsl(volatile u32 *port, const void *buf, int nl);
+extern void _insw_ns(volatile u16 *port, void *buf, int ns);
+extern void _outsw_ns(volatile u16 *port, const void *buf, int ns);
+extern void _insl_ns(volatile u32 *port, void *buf, int nl);
+extern void _outsl_ns(volatile u32 *port, const void *buf, int nl);
+
+/*
+ * The *_ns versions below don't do byte-swapping.
+ * Neither do the standard versions now, these are just here
+ * for older code.
+ */
+#define insw_ns(port, buf, ns)  _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
+#define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
+#define insl_ns(port, buf, nl)  _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
+#define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
+
+
+#define IO_SPACE_LIMIT ~0
+
+#define memset_io(a,b,c)       memset((void *)(a),(b),(c))
+#define memcpy_fromio(a,b,c)   memcpy((a),(void *)(b),(c))
+#define memcpy_toio(a,b,c)  memcpy((void *)(a),(b),(c))
+
+/*
+ * Enforce In-order Execution of I/O:
+ * Acts as a barrier to ensure all previous I/O accesses have
+ * completed before any further ones are issued.
+ */
+#define eieio() __asm__ __volatile__ ("eieio" : : : "memory");
+#define sync()  __asm__ __volatile__ ("sync" : : : "memory");
+
+/* Enforce in-order execution of data I/O.
+ * No distinction between read/write on PPC; use eieio for all three.
+ */
+#define iobarrier_rw() eieio()
+#define iobarrier_r()  eieio()
+#define iobarrier_w()  eieio()
+
+/*
+ * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
+ */
+extern inline int in_8(volatile u8 *addr)
+{
+    int ret;
+
+    __asm__ __volatile__("lbz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
+    return ret;
+}
+
+extern inline void out_8(volatile u8 *addr, int val)
+{
+    __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
+}
+
+extern inline int in_le16(volatile u16 *addr)
+{
+    int ret;
+
+    __asm__ __volatile__("lhbrx %0,0,%1; eieio" : "=r" (ret) :
+                  "r" (addr), "m" (*addr));
+    return ret;
+}
+
+extern inline int in_be16(volatile u16 *addr)
+{
+    int ret;
+
+    __asm__ __volatile__("lhz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
+    return ret;
+}
+
+extern inline void out_le16(volatile u16 *addr, int val)
+{
+    __asm__ __volatile__("sthbrx %1,0,%2; eieio" : "=m" (*addr) :
+                  "r" (val), "r" (addr));
+}
+
+extern inline void out_be16(volatile u16 *addr, int val)
+{
+    __asm__ __volatile__("sth%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
+}
+
+extern inline unsigned in_le32(volatile u32 *addr)
+{
+    unsigned ret;
+
+    __asm__ __volatile__("lwbrx %0,0,%1; eieio" : "=r" (ret) :
+                 "r" (addr), "m" (*addr));
+    return ret;
+}
+
+extern inline unsigned in_be32(volatile u32 *addr)
+{
+    unsigned ret;
+
+    __asm__ __volatile__("lwz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
+    return ret;
+}
+
+extern inline void out_le32(volatile unsigned *addr, int val)
+{
+    __asm__ __volatile__("stwbrx %1,0,%2; eieio" : "=m" (*addr) :
+                 "r" (val), "r" (addr));
+}
+
+extern inline void out_be32(volatile unsigned *addr, int val)
+{
+    __asm__ __volatile__("stw%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
+}
+
+#endif