1 files changed, 68 insertions, 0 deletions
diff --git a/arch/mips/deskstation/io.c b/arch/mips/deskstation/io.c
new file mode 100644
index 000000000..cd33e2eb6
--- /dev/null
+++ b/arch/mips/deskstation/io.c
@@ -0,0 +1,68 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Low level I/O functions for Jazz family machine.
+ *
+ * FIXME: This implementation fits the Tyne.  How does the EISA rPC44 handle
+ * the eight high address bits?
+ */
+#include <linux/string.h>
+#include <asm/mipsconfig.h>
+#include <asm/addrspace.h>
+#include <asm/sni.h>
+
+/*
+ * isa_slot_offset is the address where E(ISA) busaddress 0 is is mapped
+ * for the processor.
+ */
+extern unsigned long isa_slot_offset;
+
+static unsigned char deskstation_readb(unsigned long addr)
+{
+	return *(volatile unsigned char *) (isa_slot_offset + addr);
+}
+
+static unsigned short deskstation_readw(unsigned long addr)
+{
+	return *(volatile unsigned short *) (isa_slot_offset + addr);
+}
+
+static unsigned int deskstation_readl(unsigned long addr)
+{
+	return *(volatile unsigned int *) (isa_slot_offset + addr);
+}
+
+static void deskstation_writeb(unsigned char val, unsigned long addr)
+{
+	*(volatile unsigned char *) (isa_slot_offset + addr) = val;
+}
+
+static void deskstation_writew(unsigned short val, unsigned long addr)
+{
+	*(volatile unsigned char *) (isa_slot_offset + addr) = val;
+}
+
+static void deskstation_writel(unsigned int val, unsigned long addr)
+{
+	*(volatile unsigned char *) (isa_slot_offset + addr) = val;
+}
+
+static void deskstation_memset_io(unsigned long addr, int val, unsigned long len)
+{
+	addr += isa_slot_offset;
+	memset((void *)addr, val, len);
+}
+
+static void deskstation_memcpy_fromio(unsigned long to, unsigned long from, unsigned long len)
+{
+	from += isa_slot_offset;
+	memcpy((void *)to, (void *)from, len);
+}
+
+static void deskstation_memcpy_toio(unsigned long to, unsigned long from, unsigned long len)
+{
+	to += isa_slot_offset;
+	memcpy((void *)to, (void *)from, len);
+}