diff --git a/include/asm-mips/mips-boards/piix4.h b/include/asm-mips/mips-boards/piix4.h
new file mode 100644
index 0000000..2971d60
--- /dev/null
+++ b/include/asm-mips/mips-boards/piix4.h
@@ -0,0 +1,80 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope 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.
+ *
+ * Register definitions for Intel PIIX4 South Bridge Device.
+ */
+#ifndef __ASM_MIPS_BOARDS_PIIX4_H
+#define __ASM_MIPS_BOARDS_PIIX4_H
+
+/************************************************************************
+ *  IO register offsets
+ ************************************************************************/
+#define PIIX4_ICTLR1_ICW1	0x20
+#define PIIX4_ICTLR1_ICW2	0x21
+#define PIIX4_ICTLR1_ICW3	0x21
+#define PIIX4_ICTLR1_ICW4	0x21
+#define PIIX4_ICTLR2_ICW1	0xa0
+#define PIIX4_ICTLR2_ICW2	0xa1
+#define PIIX4_ICTLR2_ICW3	0xa1
+#define PIIX4_ICTLR2_ICW4	0xa1
+#define PIIX4_ICTLR1_OCW1	0x21
+#define PIIX4_ICTLR1_OCW2	0x20
+#define PIIX4_ICTLR1_OCW3	0x20
+#define PIIX4_ICTLR1_OCW4	0x20
+#define PIIX4_ICTLR2_OCW1	0xa1
+#define PIIX4_ICTLR2_OCW2	0xa0
+#define PIIX4_ICTLR2_OCW3	0xa0
+#define PIIX4_ICTLR2_OCW4	0xa0
+
+
+/************************************************************************
+ *  Register encodings.
+ ************************************************************************/
+#define PIIX4_OCW2_NSEOI	(0x1 << 5)
+#define PIIX4_OCW2_SEOI		(0x3 << 5)
+#define PIIX4_OCW2_RNSEOI	(0x5 << 5)
+#define PIIX4_OCW2_RAEOIS	(0x4 << 5)
+#define PIIX4_OCW2_RAEOIC	(0x0 << 5)
+#define PIIX4_OCW2_RSEOI	(0x7 << 5)
+#define PIIX4_OCW2_SP		(0x6 << 5)
+#define PIIX4_OCW2_NOP		(0x2 << 5)
+
+#define PIIX4_OCW2_SEL          (0x0 << 3)
+
+#define PIIX4_OCW2_ILS_0	0
+#define PIIX4_OCW2_ILS_1	1
+#define PIIX4_OCW2_ILS_2	2
+#define PIIX4_OCW2_ILS_3	3
+#define PIIX4_OCW2_ILS_4	4
+#define PIIX4_OCW2_ILS_5	5
+#define PIIX4_OCW2_ILS_6	6
+#define PIIX4_OCW2_ILS_7	7
+#define PIIX4_OCW2_ILS_8	0
+#define PIIX4_OCW2_ILS_9	1
+#define PIIX4_OCW2_ILS_10	2
+#define PIIX4_OCW2_ILS_11	3
+#define PIIX4_OCW2_ILS_12	4
+#define PIIX4_OCW2_ILS_13	5
+#define PIIX4_OCW2_ILS_14	6
+#define PIIX4_OCW2_ILS_15	7
+
+#define PIIX4_OCW3_SEL          (0x1 << 3)
+
+#define PIIX4_OCW3_IRR          0x2
+#define PIIX4_OCW3_ISR          0x3
+
+#endif /* __ASM_MIPS_BOARDS_PIIX4_H */