Patch by TsiChung Liew, 23 Sep 2004: - add support for MPC8220 CPU - Add support for Alaska and Yukon boards

diff --git a/cpu/mpc8220/io.S b/cpu/mpc8220/io.S
new file mode 100644
index 0000000..5ecdf55
--- /dev/null
+++ b/cpu/mpc8220/io.S

@@ -0,0 +1,128 @@
+/*
+ *  Copyright (C) 1998	Dan Malek <dmalek@jlc.net>
+ *  Copyright (C) 1999	Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
+ *  Copyright (C) 2001	Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ *			Andreas Heppel <aheppel@sysgo.de>
+ *  Copyright (C) 2003	Wolfgang Denk <wd@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <ppc_asm.tmpl>
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  in8 */
+/*  Description:  Input 8 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl	in8
+in8:
+	lbz	r3,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  in16 */
+/*  Description:  Input 16 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl	in16
+in16:
+	lhz	r3,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  in16r */
+/*  Description:  Input 16 bits and byte reverse */
+/* ------------------------------------------------------------------------------- */
+	.globl	in16r
+in16r:
+	lhbrx	r3,0,r3
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  in32 */
+/*  Description:  Input 32 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl	in32
+in32:
+	lwz	3,0(3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  in32r */
+/*  Description:  Input 32 bits and byte reverse */
+/* ------------------------------------------------------------------------------- */
+	.globl	in32r
+in32r:
+	lwbrx	r3,0,r3
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  out8 */
+/*  Description:  Output 8 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl	out8
+out8:
+	stb	r4,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  out16 */
+/*  Description:  Output 16 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl	out16
+out16:
+	sth	r4,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  out16r */
+/*  Description:  Byte reverse and output 16 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl	out16r
+out16r:
+	sthbrx	r4,0,r3
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  out32 */
+/*  Description:  Output 32 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl	out32
+out32:
+	stw	r4,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:	  out32r */
+/*  Description:  Byte reverse and output 32 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl	out32r
+out32r:
+	stwbrx	r4,0,r3
+	sync
+	blr