Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

25 files changed, 3509 insertions, 0 deletions

diff --git a/arch/mips/ddb5xxx/common/Makefile b/arch/mips/ddb5xxx/common/Makefile
new file mode 100644
index 000000000000..bc44e3032711
--- /dev/null
+++ b/arch/mips/ddb5xxx/common/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the common code of NEC DDB-Vrc5xxx board
+#
+
+obj-y	 += nile4.o prom.o rtc_ds1386.o
diff --git a/arch/mips/ddb5xxx/common/nile4.c b/arch/mips/ddb5xxx/common/nile4.c
new file mode 100644
index 000000000000..7ec7d903ba97
--- /dev/null
+++ b/arch/mips/ddb5xxx/common/nile4.c
@@ -0,0 +1,130 @@
+/*
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * arch/mips/ddb5xxx/common/nile4.c
+ *     misc low-level routines for vrc-5xxx controllers.
+ *
+ * derived from original code by Geert Uytterhoeven <geert@sonycom.com>
+ *
+ * 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.
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+u32
+ddb_calc_pdar(u32 phys, u32 size, int width,
+	      int on_memory_bus, int pci_visible)
+{
+        u32 maskbits;
+        u32 widthbits;
+
+        switch (size) {
+#if 0                           /* We don't support 4 GB yet */
+        case 0x100000000:       /* 4 GB */
+                maskbits = 4;
+                break;
+#endif
+        case 0x80000000:        /* 2 GB */
+                maskbits = 5;
+                break;
+        case 0x40000000:        /* 1 GB */
+                maskbits = 6;
+                break;
+        case 0x20000000:        /* 512 MB */
+                maskbits = 7;
+                break;
+        case 0x10000000:        /* 256 MB */
+                maskbits = 8;
+                break;
+        case 0x08000000:        /* 128 MB */
+                maskbits = 9;
+                break;
+        case 0x04000000:        /* 64 MB */
+                maskbits = 10;
+                break;
+        case 0x02000000:        /* 32 MB */
+                maskbits = 11;
+                break;
+        case 0x01000000:        /* 16 MB */
+                maskbits = 12;
+                break;
+        case 0x00800000:        /* 8 MB */
+                maskbits = 13;
+                break;
+        case 0x00400000:        /* 4 MB */
+                maskbits = 14;
+                break;
+        case 0x00200000:        /* 2 MB */
+                maskbits = 15;
+                break;
+        case 0:         /* OFF */
+                maskbits = 0;
+                break;
+        default:
+                panic("nile4_set_pdar: unsupported size %p", (void *) size);
+        }
+        switch (width) {
+        case 8:
+                widthbits = 0;
+                break;
+        case 16:
+                widthbits = 1;
+                break;
+        case 32:
+                widthbits = 2;
+                break;
+        case 64:
+                widthbits = 3;
+                break;
+        default:
+                panic("nile4_set_pdar: unsupported width %d", width);
+        }
+
+	return maskbits | (on_memory_bus ? 0x10 : 0) |
+		(pci_visible ? 0x20 : 0) | (widthbits << 6) |
+		(phys & 0xffe00000);
+}
+
+void
+ddb_set_pdar(u32 pdar, u32 phys, u32 size, int width,
+	     int on_memory_bus, int pci_visible)
+{
+	u32 temp= ddb_calc_pdar(phys, size, width, on_memory_bus, pci_visible);
+	ddb_out32(pdar, temp);
+	ddb_out32(pdar + 4, 0);
+
+        /*
+         * When programming a PDAR, the register should be read immediately
+         * after writing it. This ensures that address decoders are properly
+         * configured.
+	 * [jsun] is this really necessary?
+         */
+        ddb_in32(pdar);
+        ddb_in32(pdar + 4);
+}
+
+/*
+ * routines that mess with PCIINITx registers
+ */
+
+void ddb_set_pmr(u32 pmr, u32 type, u32 addr, u32 options)
+{
+        switch (type) {
+        case DDB_PCICMD_IACK: /* PCI Interrupt Acknowledge */
+        case DDB_PCICMD_IO:   /* PCI I/O Space */
+        case DDB_PCICMD_MEM:  /* PCI Memory Space */
+        case DDB_PCICMD_CFG:  /* PCI Configuration Space */
+                break;
+        default:
+                panic("nile4_set_pmr: invalid type %d", type);
+        }
+        ddb_out32(pmr, (type << 1) | (addr & 0xffe00000) | options );
+        ddb_out32(pmr + 4, 0);
+}
diff --git a/arch/mips/ddb5xxx/common/prom.c b/arch/mips/ddb5xxx/common/prom.c
new file mode 100644
index 000000000000..b8d1f7489f3b
--- /dev/null
+++ b/arch/mips/ddb5xxx/common/prom.c
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * 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.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/bootmem.h>
+
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <asm/ddb5xxx/ddb5xxx.h>
+#include <asm/debug.h>
+
+const char *get_system_type(void)
+{
+	switch (mips_machtype) {
+	case MACH_NEC_DDB5074:		return "NEC DDB Vrc-5074";
+	case MACH_NEC_DDB5476:		return "NEC DDB Vrc-5476";
+	case MACH_NEC_DDB5477:		return "NEC DDB Vrc-5477";
+	case MACH_NEC_ROCKHOPPER:	return "NEC Rockhopper";
+	case MACH_NEC_ROCKHOPPERII:     return "NEC RockhopperII";
+	default:			return "Unknown NEC board";
+	}
+}
+
+#if defined(CONFIG_DDB5477)
+void ddb5477_runtime_detection(void);
+#endif
+
+/* [jsun@junsun.net] PMON passes arguments in C main() style */
+void __init prom_init(void)
+{
+	int argc = fw_arg0;
+	char **arg = (char**) fw_arg1;
+	int i;
+
+	/* if user passes kernel args, ignore the default one */
+	if (argc > 1)
+		arcs_cmdline[0] = '\0';
+
+	/* arg[0] is "g", the rest is boot parameters */
+	for (i = 1; i < argc; i++) {
+		if (strlen(arcs_cmdline) + strlen(arg[i] + 1)
+		    >= sizeof(arcs_cmdline))
+			break;
+		strcat(arcs_cmdline, arg[i]);
+		strcat(arcs_cmdline, " ");
+	}
+
+	mips_machgroup = MACH_GROUP_NEC_DDB;
+
+#if defined(CONFIG_DDB5074)
+	mips_machtype = MACH_NEC_DDB5074;
+	add_memory_region(0, DDB_SDRAM_SIZE, BOOT_MEM_RAM);
+#elif defined(CONFIG_DDB5476)
+	mips_machtype = MACH_NEC_DDB5476;
+	add_memory_region(0, DDB_SDRAM_SIZE, BOOT_MEM_RAM);
+#elif defined(CONFIG_DDB5477)
+	ddb5477_runtime_detection();
+	add_memory_region(0, board_ram_size, BOOT_MEM_RAM);
+#endif
+}
+
+unsigned long __init prom_free_prom_memory(void)
+{
+	return 0;
+}
+
+#if defined(CONFIG_DDB5477)
+
+#define DEFAULT_LCS1_BASE 0x19000000
+#define TESTVAL1 'K'
+#define TESTVAL2 'S'
+
+int board_ram_size;
+void ddb5477_runtime_detection(void)
+{
+	volatile char *test_offset;
+	char saved_test_byte;
+
+        /* Determine if this is a DDB5477 board, or a BSB-VR0300
+           base board.  We can tell by checking for the location of
+           the NVRAM.  It lives at the beginning of LCS1 on the DDB5477,
+           and the beginning of LCS1 on the BSB-VR0300 is flash memory.
+           The first 2K of the NVRAM are reserved, so don't we'll poke
+           around just after that.
+         */
+
+	/* We can only use the PCI bus to distinquish between
+	   the Rockhopper and RockhopperII backplanes and this must
+	   wait until ddb5477_board_init() in setup.c after the 5477
+	   is initialized.  So, until then handle
+	   both Rockhopper and RockhopperII backplanes as Rockhopper 1
+	 */
+
+        test_offset = (char *)KSEG1ADDR(DEFAULT_LCS1_BASE + 0x800);
+        saved_test_byte = *test_offset;
+
+        *test_offset = TESTVAL1;
+        if (*test_offset != TESTVAL1) {
+                /* We couldn't set our test value, so it must not be NVRAM,
+                   so it's a BSB_VR0300 */
+		mips_machtype = MACH_NEC_ROCKHOPPER;
+        } else {
+                /* We may have gotten lucky, and the TESTVAL1 was already
+                   stored at the test location, so we must check a second
+                   test value */
+                *test_offset = TESTVAL2;
+                if (*test_offset != TESTVAL2) {
+                        /* OK, we couldn't set this value either, so it must
+                           definately be a BSB_VR0300 */
+			mips_machtype = MACH_NEC_ROCKHOPPER;
+                } else {
+                        /* We could change the value twice, so it must be
+                        NVRAM, so it's a DDB_VRC5477 */
+			mips_machtype = MACH_NEC_DDB5477;
+                }
+        }
+        /* Restore the original byte */
+        *test_offset = saved_test_byte;
+
+	/* before we know a better way, we will trust PMON for getting
+	 * RAM size
+	 */
+	board_ram_size = 1 << (36 - (ddb_in32(DDB_SDRAM0) & 0xf));
+
+	db_run(printk("DDB run-time detection : %s, %d MB RAM\n",
+				mips_machtype == MACH_NEC_DDB5477 ?
+				"DDB5477" : "Rockhopper",
+				board_ram_size >> 20));
+
+	/* we can't handle ram size > 128 MB */
+	db_assert(board_ram_size <= (128 << 20));
+}
+#endif
diff --git a/arch/mips/ddb5xxx/common/rtc_ds1386.c b/arch/mips/ddb5xxx/common/rtc_ds1386.c
new file mode 100644
index 000000000000..f5b11508ff2f
--- /dev/null
+++ b/arch/mips/ddb5xxx/common/rtc_ds1386.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * arch/mips/ddb5xxx/common/rtc_ds1386.c
+ *     low-level RTC hookups for s for Dallas 1396 chip.
+ *
+ * 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 file exports a function, rtc_ds1386_init(), which expects an
+ * uncached base address as the argument.  It will set the two function
+ * pointers expected by the MIPS generic timer code.
+ */
+
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/bcd.h>
+
+#include <asm/time.h>
+#include <asm/addrspace.h>
+
+#include <asm/mc146818rtc.h>
+#include <asm/debug.h>
+
+#define	EPOCH		2000
+
+#define	READ_RTC(x)	*(volatile unsigned char*)(rtc_base+x)
+#define	WRITE_RTC(x, y)	*(volatile unsigned char*)(rtc_base+x) = y
+
+static unsigned long rtc_base;
+
+static unsigned long
+rtc_ds1386_get_time(void)
+{
+	u8 byte;
+	u8 temp;
+	unsigned int year, month, day, hour, minute, second;
+
+	/* let us freeze external registers */
+	byte = READ_RTC(0xB);
+	byte &= 0x3f;
+	WRITE_RTC(0xB, byte);
+
+	/* read time data */
+	year = BCD2BIN(READ_RTC(0xA)) + EPOCH;
+	month = BCD2BIN(READ_RTC(0x9) & 0x1f);
+	day = BCD2BIN(READ_RTC(0x8));
+	minute = BCD2BIN(READ_RTC(0x2));
+	second = BCD2BIN(READ_RTC(0x1));
+
+	/* hour is special - deal with it later */
+	temp = READ_RTC(0x4);
+
+	/* enable time transfer */
+	byte |= 0x80;
+	WRITE_RTC(0xB, byte);
+
+	/* calc hour */
+	if (temp & 0x40) {
+		/* 12 hour format */
+		hour = BCD2BIN(temp & 0x1f);
+		if (temp & 0x20) hour += 12; 		/* PM */
+	} else {
+		/* 24 hour format */
+		hour = BCD2BIN(temp & 0x3f);
+	}
+
+	return mktime(year, month, day, hour, minute, second);
+}
+
+static int
+rtc_ds1386_set_time(unsigned long t)
+{
+	struct rtc_time tm;
+	u8 byte;
+	u8 temp;
+	u8 year, month, day, hour, minute, second;
+
+	/* let us freeze external registers */
+	byte = READ_RTC(0xB);
+	byte &= 0x3f;
+	WRITE_RTC(0xB, byte);
+
+	/* convert */
+	to_tm(t, &tm);
+
+
+	/* check each field one by one */
+	year = BIN2BCD(tm.tm_year - EPOCH);
+	if (year != READ_RTC(0xA)) {
+		WRITE_RTC(0xA, year);
+	}
+
+	temp = READ_RTC(0x9);
+	month = BIN2BCD(tm.tm_mon+1);	/* tm_mon starts from 0 to 11 */
+	if (month != (temp & 0x1f)) {
+		WRITE_RTC( 0x9,
+			   (month & 0x1f) | (temp & ~0x1f) );
+	}
+
+	day = BIN2BCD(tm.tm_mday);
+	if (day != READ_RTC(0x8)) {
+		WRITE_RTC(0x8, day);
+	}
+
+	temp = READ_RTC(0x4);
+	if (temp & 0x40) {
+		/* 12 hour format */
+		hour = 0x40;
+		if (tm.tm_hour > 12) {
+			hour |= 0x20 | (BIN2BCD(hour-12) & 0x1f);
+		} else {
+			hour |= BIN2BCD(tm.tm_hour);
+		}
+	} else {
+		/* 24 hour format */
+		hour = BIN2BCD(tm.tm_hour) & 0x3f;
+	}
+	if (hour != temp) WRITE_RTC(0x4, hour);
+
+	minute = BIN2BCD(tm.tm_min);
+	if (minute != READ_RTC(0x2)) {
+		WRITE_RTC(0x2, minute);
+	}
+
+	second = BIN2BCD(tm.tm_sec);
+	if (second != READ_RTC(0x1)) {
+		WRITE_RTC(0x1, second);
+	}
+
+	return 0;
+}
+
+void
+rtc_ds1386_init(unsigned long base)
+{
+	unsigned char byte;
+
+	/* remember the base */
+	rtc_base = base;
+	db_assert((rtc_base & 0xe0000000) == KSEG1);
+
+	/* turn on RTC if it is not on */
+	byte = READ_RTC(0x9);
+	if (byte & 0x80) {
+		byte &= 0x7f;
+		WRITE_RTC(0x9, byte);
+	}
+
+	/* enable time transfer */
+	byte = READ_RTC(0xB);
+	byte |= 0x80;
+	WRITE_RTC(0xB, byte);
+
+	/* set the function pointers */
+	rtc_get_time = rtc_ds1386_get_time;
+	rtc_set_time = rtc_ds1386_set_time;
+}
diff --git a/arch/mips/ddb5xxx/ddb5074/Makefile b/arch/mips/ddb5xxx/ddb5074/Makefile
new file mode 100644
index 000000000000..488206b8d94e
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5074/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the NEC DDB Vrc-5074 specific kernel interface routines
+# under Linux.
+#
+
+obj-y			+= setup.o irq.o int-handler.o nile4_pic.o
+
+EXTRA_AFLAGS := $(CFLAGS)
diff --git a/arch/mips/ddb5xxx/ddb5074/int-handler.S b/arch/mips/ddb5xxx/ddb5074/int-handler.S
new file mode 100644
index 000000000000..a78644150b37
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5074/int-handler.S
@@ -0,0 +1,120 @@
+/*
+ *  arch/mips/ddb5074/int-handler.S -- NEC DDB Vrc-5074 interrupt handler
+ *
+ *  Based on arch/mips/sgi/kernel/indyIRQ.S
+ *
+ *  Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
+ *
+ *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
+ *                     Sony Software Development Center Europe (SDCE), Brussels
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+/* A lot of complication here is taken away because:
+ *
+ * 1) We handle one interrupt and return, sitting in a loop and moving across
+ *    all the pending IRQ bits in the cause register is _NOT_ the answer, the
+ *    common case is one pending IRQ so optimize in that direction.
+ *
+ * 2) We need not check against bits in the status register IRQ mask, that
+ *    would make this routine slow as hell.
+ *
+ * 3) Linux only thinks in terms of all IRQs on or all IRQs off, nothing in
+ *    between like BSD spl() brain-damage.
+ *
+ * Furthermore, the IRQs on the INDY look basically (barring software IRQs
+ * which we don't use at all) like:
+ *
+ *	MIPS IRQ	Source
+ *      --------        ------
+ *             0	Software (ignored)
+ *             1        Software (ignored)
+ *             2        Local IRQ level zero
+ *             3        Local IRQ level one
+ *             4        8254 Timer zero
+ *             5        8254 Timer one
+ *             6        Bus Error
+ *             7        R4k timer (what we use)
+ *
+ * We handle the IRQ according to _our_ priority which is:
+ *
+ * Highest ----     R4k Timer
+ *                  Local IRQ zero
+ *                  Local IRQ one
+ *                  Bus Error
+ *                  8254 Timer zero
+ * Lowest  ----     8254 Timer one
+ *
+ * then we just return, if multiple IRQs are pending then we will just take
+ * another exception, big deal.
+ */
+
+	.text
+	.set	noreorder
+	.set	noat
+	.align	5
+	NESTED(ddbIRQ, PT_SIZE, sp)
+	SAVE_ALL
+	CLI
+	.set	at
+	mfc0	s0, CP0_CAUSE		# get irq mask
+
+#if 1
+	mfc0	t2,CP0_STATUS		# get enabled interrupts
+	and	s0,t2			# isolate allowed ones
+#endif
+	/* First we check for r4k counter/timer IRQ. */
+	andi	a0, s0, CAUSEF_IP2	# delay slot, check local level zero
+	beq	a0, zero, 1f
+	 andi	a0, s0, CAUSEF_IP3	# delay slot, check local level one
+
+	/* Wheee, local level zero interrupt. */
+	jal	ddb_local0_irqdispatch
+	 move	a0, sp			# delay slot
+
+	j	ret_from_irq
+	 nop				# delay slot
+
+1:
+	beq	a0, zero, 1f
+	 andi	a0, s0, CAUSEF_IP6	# delay slot, check bus error
+
+	/* Wheee, local level one interrupt. */
+	move	a0, sp
+	jal	ddb_local1_irqdispatch
+	 nop
+
+	j	ret_from_irq
+	 nop
+
+1:
+	beq	a0, zero, 1f
+	 nop
+
+	/* Wheee, an asynchronous bus error... */
+	move	a0, sp
+	jal	ddb_buserror_irq
+	 nop
+
+	j	ret_from_irq
+	 nop
+
+1:
+	/* Here by mistake?  This is possible, what can happen
+	 * is that by the time we take the exception the IRQ
+	 * pin goes low, so just leave if this is the case.
+	 */
+	andi	a0, s0, (CAUSEF_IP4 | CAUSEF_IP5)
+	beq	a0, zero, 1f
+
+	/* Must be one of the 8254 timers... */
+	move	a0, sp
+	jal	ddb_8254timer_irq
+	 nop
+1:
+	j	ret_from_irq
+	 nop
+	END(ddbIRQ)
diff --git a/arch/mips/ddb5xxx/ddb5074/irq.c b/arch/mips/ddb5xxx/ddb5074/irq.c
new file mode 100644
index 000000000000..45088a1be414
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5074/irq.c
@@ -0,0 +1,159 @@
+/*
+ *  arch/mips/ddb5074/irq.c -- NEC DDB Vrc-5074 interrupt routines
+ *
+ *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
+ *                     Sony Software Development Center Europe (SDCE), Brussels
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+
+#include <asm/i8259.h>
+#include <asm/io.h>
+#include <asm/irq_cpu.h>
+#include <asm/ptrace.h>
+#include <asm/nile4.h>
+#include <asm/ddb5xxx/ddb5xxx.h>
+#include <asm/ddb5xxx/ddb5074.h>
+
+
+extern asmlinkage void ddbIRQ(void);
+
+static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
+
+#define M1543_PNP_CONFIG	0x03f0	/* PnP Config Port */
+#define M1543_PNP_INDEX		0x03f0	/* PnP Index Port */
+#define M1543_PNP_DATA		0x03f1	/* PnP Data Port */
+
+#define M1543_PNP_ALT_CONFIG	0x0370	/* Alternative PnP Config Port */
+#define M1543_PNP_ALT_INDEX	0x0370	/* Alternative PnP Index Port */
+#define M1543_PNP_ALT_DATA	0x0371	/* Alternative PnP Data Port */
+
+#define M1543_INT1_MASTER_CTRL	0x0020	/* INT_1 (master) Control Register */
+#define M1543_INT1_MASTER_MASK	0x0021	/* INT_1 (master) Mask Register */
+
+#define M1543_INT1_SLAVE_CTRL	0x00a0	/* INT_1 (slave) Control Register */
+#define M1543_INT1_SLAVE_MASK	0x00a1	/* INT_1 (slave) Mask Register */
+
+#define M1543_INT1_MASTER_ELCR	0x04d0	/* INT_1 (master) Edge/Level Control */
+#define M1543_INT1_SLAVE_ELCR	0x04d1	/* INT_1 (slave) Edge/Level Control */
+
+
+static void m1543_irq_setup(void)
+{
+	/*
+	 *  The ALI M1543 has 13 interrupt inputs, IRQ1..IRQ13.  Not all
+	 *  the possible IO sources in the M1543 are in use by us.  We will
+	 *  use the following mapping:
+	 *
+	 *      IRQ1  - keyboard (default set by M1543)
+	 *      IRQ3  - reserved for UART B (default set by M1543) (note that
+	 *              the schematics for the DDB Vrc-5074 board seem to
+	 *              indicate that IRQ3 is connected to the DS1386
+	 *              watchdog timer interrupt output so we might have
+	 *              a conflict)
+	 *      IRQ4  - reserved for UART A (default set by M1543)
+	 *      IRQ5  - parallel (default set by M1543)
+	 *      IRQ8  - DS1386 time of day (RTC) interrupt
+	 *      IRQ12 - mouse
+	 */
+
+	/*
+	 *  Assing mouse interrupt to IRQ12
+	 */
+
+	/* Enter configuration mode */
+	outb(0x51, M1543_PNP_CONFIG);
+	outb(0x23, M1543_PNP_CONFIG);
+
+	/* Select logical device 7 (Keyboard) */
+	outb(0x07, M1543_PNP_INDEX);
+	outb(0x07, M1543_PNP_DATA);
+
+	/* Select IRQ12 */
+	outb(0x72, M1543_PNP_INDEX);
+	outb(0x0c, M1543_PNP_DATA);
+
+	outb(0x30, M1543_PNP_INDEX);
+	printk("device 7, 0x30: %02x\n",inb(M1543_PNP_DATA));
+
+	outb(0x70, M1543_PNP_INDEX);
+	printk("device 7, 0x70: %02x\n",inb(M1543_PNP_DATA));
+
+	/* Leave configration mode */
+	outb(0xbb, M1543_PNP_CONFIG);
+
+
+}
+
+void ddb_local0_irqdispatch(struct pt_regs *regs)
+{
+	u32 mask;
+	int nile4_irq;
+
+	mask = nile4_get_irq_stat(0);
+
+	/* Handle the timer interrupt first */
+#if 0
+	if (mask & (1 << NILE4_INT_GPT)) {
+		do_IRQ(nile4_to_irq(NILE4_INT_GPT), regs);
+		mask &= ~(1 << NILE4_INT_GPT);
+	}
+#endif
+	for (nile4_irq = 0; mask; nile4_irq++, mask >>= 1)
+		if (mask & 1) {
+			if (nile4_irq == NILE4_INT_INTE) {
+				int i8259_irq;
+
+				nile4_clear_irq(NILE4_INT_INTE);
+				i8259_irq = nile4_i8259_iack();
+				do_IRQ(i8259_irq, regs);
+			} else
+				do_IRQ(nile4_to_irq(nile4_irq), regs);
+
+		}
+}
+
+void ddb_local1_irqdispatch(void)
+{
+	printk("ddb_local1_irqdispatch called\n");
+}
+
+void ddb_buserror_irq(void)
+{
+	printk("ddb_buserror_irq called\n");
+}
+
+void ddb_8254timer_irq(void)
+{
+	printk("ddb_8254timer_irq called\n");
+}
+
+void __init arch_init_irq(void)
+{
+	/* setup cascade interrupts */
+	setup_irq(NILE4_IRQ_BASE  + NILE4_INT_INTE, &irq_cascade);
+	setup_irq(CPU_IRQ_BASE + CPU_NILE4_CASCADE, &irq_cascade);
+
+	set_except_vector(0, ddbIRQ);
+
+	nile4_irq_setup(NILE4_IRQ_BASE);
+	m1543_irq_setup();
+	init_i8259_irqs();
+
+
+	printk("CPU_IRQ_BASE: %d\n",CPU_IRQ_BASE);
+
+	mips_cpu_irq_init(CPU_IRQ_BASE);
+
+	printk("enabling 8259 cascade\n");
+
+	ddb5074_led_hex(0);
+
+	/* Enable the interrupt cascade */
+	nile4_enable_irq(NILE4_IRQ_BASE+IRQ_I8259_CASCADE);
+}
diff --git a/arch/mips/ddb5xxx/ddb5074/nile4_pic.c b/arch/mips/ddb5xxx/ddb5074/nile4_pic.c
new file mode 100644
index 000000000000..68c127cd70c9
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5074/nile4_pic.c
@@ -0,0 +1,287 @@
+/*
+ *  arch/mips/ddb5476/nile4.c --
+ *  	low-level PIC code for NEC Vrc-5476 (Nile 4)
+ *
+ *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
+ *                     Sony Software Development Center Europe (SDCE), Brussels
+ *
+ *  Copyright 2001 MontaVista Software Inc.
+ *  Author: jsun@mvista.com or jsun@junsun.net
+ *
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+
+#include <asm/addrspace.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+static int irq_base;
+
+/*
+ *  Interrupt Programming
+ */
+void nile4_map_irq(int nile4_irq, int cpu_irq)
+{
+	u32 offset, t;
+
+	offset = DDB_INTCTRL;
+	if (nile4_irq >= 8) {
+		offset += 4;
+		nile4_irq -= 8;
+	}
+	t = ddb_in32(offset);
+	t &= ~(7 << (nile4_irq * 4));
+	t |= cpu_irq << (nile4_irq * 4);
+	ddb_out32(offset, t);
+}
+
+void nile4_map_irq_all(int cpu_irq)
+{
+	u32 all, t;
+
+	all = cpu_irq;
+	all |= all << 4;
+	all |= all << 8;
+	all |= all << 16;
+	t = ddb_in32(DDB_INTCTRL);
+	t &= 0x88888888;
+	t |= all;
+	ddb_out32(DDB_INTCTRL, t);
+	t = ddb_in32(DDB_INTCTRL + 4);
+	t &= 0x88888888;
+	t |= all;
+	ddb_out32(DDB_INTCTRL + 4, t);
+}
+
+void nile4_enable_irq(unsigned int nile4_irq)
+{
+	u32 offset, t;
+
+	nile4_irq-=irq_base;
+
+	ddb5074_led_hex(8);
+
+	offset = DDB_INTCTRL;
+	if (nile4_irq >= 8) {
+		offset += 4;
+		nile4_irq -= 8;
+	}
+	ddb5074_led_hex(9);
+	t = ddb_in32(offset);
+	ddb5074_led_hex(0xa);
+	t |= 8 << (nile4_irq * 4);
+	ddb_out32(offset, t);
+	ddb5074_led_hex(0xb);
+}
+
+void nile4_disable_irq(unsigned int nile4_irq)
+{
+	u32 offset, t;
+
+	nile4_irq-=irq_base;
+
+	offset = DDB_INTCTRL;
+	if (nile4_irq >= 8) {
+		offset += 4;
+		nile4_irq -= 8;
+	}
+	t = ddb_in32(offset);
+	t &= ~(8 << (nile4_irq * 4));
+	ddb_out32(offset, t);
+}
+
+void nile4_disable_irq_all(void)
+{
+	ddb_out32(DDB_INTCTRL, 0);
+	ddb_out32(DDB_INTCTRL + 4, 0);
+}
+
+u16 nile4_get_irq_stat(int cpu_irq)
+{
+	return ddb_in16(DDB_INTSTAT0 + cpu_irq * 2);
+}
+
+void nile4_enable_irq_output(int cpu_irq)
+{
+	u32 t;
+
+	t = ddb_in32(DDB_INTSTAT1 + 4);
+	t |= 1 << (16 + cpu_irq);
+	ddb_out32(DDB_INTSTAT1, t);
+}
+
+void nile4_disable_irq_output(int cpu_irq)
+{
+	u32 t;
+
+	t = ddb_in32(DDB_INTSTAT1 + 4);
+	t &= ~(1 << (16 + cpu_irq));
+	ddb_out32(DDB_INTSTAT1, t);
+}
+
+void nile4_set_pci_irq_polarity(int pci_irq, int high)
+{
+	u32 t;
+
+	t = ddb_in32(DDB_INTPPES);
+	if (high)
+		t &= ~(1 << (pci_irq * 2));
+	else
+		t |= 1 << (pci_irq * 2);
+	ddb_out32(DDB_INTPPES, t);
+}
+
+void nile4_set_pci_irq_level_or_edge(int pci_irq, int level)
+{
+	u32 t;
+
+	t = ddb_in32(DDB_INTPPES);
+	if (level)
+		t |= 2 << (pci_irq * 2);
+	else
+		t &= ~(2 << (pci_irq * 2));
+	ddb_out32(DDB_INTPPES, t);
+}
+
+void nile4_clear_irq(int nile4_irq)
+{
+	nile4_irq-=irq_base;
+	ddb_out32(DDB_INTCLR, 1 << nile4_irq);
+}
+
+void nile4_clear_irq_mask(u32 mask)
+{
+	ddb_out32(DDB_INTCLR, mask);
+}
+
+u8 nile4_i8259_iack(void)
+{
+	u8 irq;
+	u32 reg;
+
+	/* Set window 0 for interrupt acknowledge */
+	reg = ddb_in32(DDB_PCIINIT0);
+
+	ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IACK, 0, DDB_PCI_ACCESS_32);
+	irq = *(volatile u8 *) KSEG1ADDR(DDB_PCI_IACK_BASE);
+	/* restore window 0 for PCI I/O space */
+	// ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IO, 0, DDB_PCI_ACCESS_32);
+	ddb_out32(DDB_PCIINIT0, reg);
+
+	/* i8269.c set the base vector to be 0x0 */
+	return irq ;
+}
+
+static unsigned int nile4_irq_startup(unsigned int irq) {
+
+	nile4_enable_irq(irq);
+	return 0;
+
+}
+
+static void nile4_ack_irq(unsigned int irq) {
+
+    ddb5074_led_hex(4);
+
+	nile4_clear_irq(irq);
+    ddb5074_led_hex(2);
+	nile4_disable_irq(irq);
+
+    ddb5074_led_hex(0);
+}
+
+static void nile4_irq_end(unsigned int irq) {
+
+	ddb5074_led_hex(3);
+	if(!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
+	ddb5074_led_hex(5);
+		nile4_enable_irq(irq);
+	ddb5074_led_hex(7);
+	}
+
+	ddb5074_led_hex(1);
+}
+
+#define nile4_irq_shutdown nile4_disable_irq
+
+static hw_irq_controller nile4_irq_controller = {
+    "nile4",
+    nile4_irq_startup,
+    nile4_irq_shutdown,
+    nile4_enable_irq,
+    nile4_disable_irq,
+    nile4_ack_irq,
+    nile4_irq_end,
+    NULL
+};
+
+void nile4_irq_setup(u32 base) {
+
+	int i;
+
+	irq_base=base;
+
+	/* Map all interrupts to CPU int #0 */
+	nile4_map_irq_all(0);
+
+	/* PCI INTA#-E# must be level triggered */
+	nile4_set_pci_irq_level_or_edge(0, 1);
+	nile4_set_pci_irq_level_or_edge(1, 1);
+	nile4_set_pci_irq_level_or_edge(2, 1);
+	nile4_set_pci_irq_level_or_edge(3, 1);
+	nile4_set_pci_irq_level_or_edge(4, 1);
+
+	/* PCI INTA#-D# must be active low, INTE# must be active high */
+	nile4_set_pci_irq_polarity(0, 0);
+	nile4_set_pci_irq_polarity(1, 0);
+	nile4_set_pci_irq_polarity(2, 0);
+	nile4_set_pci_irq_polarity(3, 0);
+	nile4_set_pci_irq_polarity(4, 1);
+
+
+	for (i = 0; i < 16; i++) {
+		nile4_clear_irq(i);
+		nile4_disable_irq(i);
+	}
+
+	/* Enable CPU int #0 */
+	nile4_enable_irq_output(0);
+
+	for (i= base; i< base + NUM_NILE4_INTERRUPTS; i++) {
+		irq_desc[i].status = IRQ_DISABLED;
+		irq_desc[i].action = NULL;
+		irq_desc[i].depth = 1;
+		irq_desc[i].handler = &nile4_irq_controller;
+	}
+}
+
+#if defined(CONFIG_RUNTIME_DEBUG)
+void nile4_dump_irq_status(void)
+{
+	printk(KERN_DEBUG "
+	       CPUSTAT = %p:%p\n", (void *) ddb_in32(DDB_CPUSTAT + 4),
+	       (void *) ddb_in32(DDB_CPUSTAT));
+	printk(KERN_DEBUG "
+	       INTCTRL = %p:%p\n", (void *) ddb_in32(DDB_INTCTRL + 4),
+	       (void *) ddb_in32(DDB_INTCTRL));
+	printk(KERN_DEBUG
+	       "INTSTAT0 = %p:%p\n",
+	       (void *) ddb_in32(DDB_INTSTAT0 + 4),
+	       (void *) ddb_in32(DDB_INTSTAT0));
+	printk(KERN_DEBUG
+	       "INTSTAT1 = %p:%p\n",
+	       (void *) ddb_in32(DDB_INTSTAT1 + 4),
+	       (void *) ddb_in32(DDB_INTSTAT1));
+	printk(KERN_DEBUG
+	       "INTCLR = %p:%p\n", (void *) ddb_in32(DDB_INTCLR + 4),
+	       (void *) ddb_in32(DDB_INTCLR));
+	printk(KERN_DEBUG
+	       "INTPPES = %p:%p\n", (void *) ddb_in32(DDB_INTPPES + 4),
+	       (void *) ddb_in32(DDB_INTPPES));
+}
+
+#endif
diff --git a/arch/mips/ddb5xxx/ddb5074/setup.c b/arch/mips/ddb5xxx/ddb5074/setup.c
new file mode 100644
index 000000000000..a73a5978d550
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5074/setup.c
@@ -0,0 +1,235 @@
+/*
+ *  arch/mips/ddb5074/setup.c -- NEC DDB Vrc-5074 setup routines
+ *
+ *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
+ *                     Sony Software Development Center Europe (SDCE), Brussels
+ */
+#include <linux/init.h>
+#include <linux/kbd_ll.h>
+#include <linux/kernel.h>
+#include <linux/kdev_t.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/ioport.h>
+#include <linux/irq.h>
+
+#include <asm/addrspace.h>
+#include <asm/bcache.h>
+#include <asm/irq.h>
+#include <asm/reboot.h>
+#include <asm/gdb-stub.h>
+#include <asm/time.h>
+#include <asm/nile4.h>
+#include <asm/ddb5xxx/ddb5074.h>
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+static void (*back_to_prom) (void) = (void (*)(void)) 0xbfc00000;
+
+static void ddb_machine_restart(char *command)
+{
+	u32 t;
+
+	/* PCI cold reset */
+	t = nile4_in32(NILE4_PCICTRL + 4);
+	t |= 0x40000000;
+	nile4_out32(NILE4_PCICTRL + 4, t);
+	/* CPU cold reset */
+	t = nile4_in32(NILE4_CPUSTAT);
+	t |= 1;
+	nile4_out32(NILE4_CPUSTAT, t);
+	/* Call the PROM */
+	back_to_prom();
+}
+
+static void ddb_machine_halt(void)
+{
+	printk("DDB Vrc-5074 halted.\n");
+	do {
+	} while (1);
+}
+
+static void ddb_machine_power_off(void)
+{
+	printk("DDB Vrc-5074 halted. Please turn off the power.\n");
+	do {
+	} while (1);
+}
+
+extern void rtc_ds1386_init(unsigned long base);
+
+extern void (*board_timer_setup) (struct irqaction * irq);
+
+static void __init ddb_timer_init(struct irqaction *irq)
+{
+	/* set the clock to 1 Hz */
+	nile4_out32(NILE4_T2CTRL, 1000000);
+	/* enable the General-Purpose Timer */
+	nile4_out32(NILE4_T2CTRL + 4, 0x00000001);
+	/* reset timer */
+	nile4_out32(NILE4_T2CNTR, 0);
+	/* enable interrupt */
+	setup_irq(nile4_to_irq(NILE4_INT_GPT), irq);
+	nile4_enable_irq(nile4_to_irq(NILE4_INT_GPT));
+	change_c0_status(ST0_IM,
+		          IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4);
+
+}
+
+static void __init ddb_time_init(void)
+{
+	/* we have ds1396 RTC chip */
+	rtc_ds1386_init(KSEG1ADDR(DDB_PCI_MEM_BASE));
+}
+
+
+
+static void __init ddb5074_setup(void)
+{
+	set_io_port_base(NILE4_PCI_IO_BASE);
+	isa_slot_offset = NILE4_PCI_MEM_BASE;
+	board_timer_setup = ddb_timer_init;
+	board_time_init = ddb_time_init;
+
+
+	_machine_restart = ddb_machine_restart;
+	_machine_halt = ddb_machine_halt;
+	_machine_power_off = ddb_machine_power_off;
+
+	ddb_out32(DDB_BAR0, 0);
+
+	ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IO, 0, 0x10);
+	ddb_set_pmr(DDB_PCIINIT1, DDB_PCICMD_MEM, DDB_PCI_MEM_BASE , 0x10);
+
+	/* Reboot on panic */
+	panic_timeout = 180;
+}
+
+early_initcall(ddb5074_setup);
+
+#define USE_NILE4_SERIAL	0
+
+#if USE_NILE4_SERIAL
+#define ns16550_in(reg)		nile4_in8((reg)*8)
+#define ns16550_out(reg, val)	nile4_out8((reg)*8, (val))
+#else
+#define NS16550_BASE		(NILE4_PCI_IO_BASE+0x03f8)
+static inline u8 ns16550_in(u32 reg)
+{
+	return *(volatile u8 *) (NS16550_BASE + reg);
+}
+
+static inline void ns16550_out(u32 reg, u8 val)
+{
+	*(volatile u8 *) (NS16550_BASE + reg) = val;
+}
+#endif
+
+#define NS16550_RBR		0
+#define NS16550_THR		0
+#define NS16550_DLL		0
+#define NS16550_IER		1
+#define NS16550_DLM		1
+#define NS16550_FCR		2
+#define NS16550_IIR		2
+#define NS16550_LCR		3
+#define NS16550_MCR		4
+#define NS16550_LSR		5
+#define NS16550_MSR		6
+#define NS16550_SCR		7
+
+#define NS16550_LSR_DR		0x01	/* Data ready */
+#define NS16550_LSR_OE		0x02	/* Overrun */
+#define NS16550_LSR_PE		0x04	/* Parity error */
+#define NS16550_LSR_FE		0x08	/* Framing error */
+#define NS16550_LSR_BI		0x10	/* Break */
+#define NS16550_LSR_THRE	0x20	/* Xmit holding register empty */
+#define NS16550_LSR_TEMT	0x40	/* Xmitter empty */
+#define NS16550_LSR_ERR		0x80	/* Error */
+
+
+void _serinit(void)
+{
+#if USE_NILE4_SERIAL
+	ns16550_out(NS16550_LCR, 0x80);
+	ns16550_out(NS16550_DLM, 0x00);
+	ns16550_out(NS16550_DLL, 0x36);	/* 9600 baud */
+	ns16550_out(NS16550_LCR, 0x00);
+	ns16550_out(NS16550_LCR, 0x03);
+	ns16550_out(NS16550_FCR, 0x47);
+#else
+	/* done by PMON */
+#endif
+}
+
+void _putc(char c)
+{
+	while (!(ns16550_in(NS16550_LSR) & NS16550_LSR_THRE));
+	ns16550_out(NS16550_THR, c);
+	if (c == '\n') {
+		while (!(ns16550_in(NS16550_LSR) & NS16550_LSR_THRE));
+		ns16550_out(NS16550_THR, '\r');
+	}
+}
+
+void _puts(const char *s)
+{
+	char c;
+	while ((c = *s++))
+		_putc(c);
+}
+
+char _getc(void)
+{
+	while (!(ns16550_in(NS16550_LSR) & NS16550_LSR_DR));
+	return ns16550_in(NS16550_RBR);
+}
+
+int _testc(void)
+{
+	return (ns16550_in(NS16550_LSR) & NS16550_LSR_DR) != 0;
+}
+
+
+/*
+ *  Hexadecimal 7-segment LED
+ */
+void ddb5074_led_hex(int hex)
+{
+	outb(hex, 0x80);
+}
+
+
+/*
+ *  LEDs D2 and D3, connected to the GPIO pins of the PMU in the ALi M1543
+ */
+struct pci_dev *pci_pmu = NULL;
+
+void ddb5074_led_d2(int on)
+{
+	u8 t;
+
+	if (pci_pmu) {
+		pci_read_config_byte(pci_pmu, 0x7e, &t);
+		if (on)
+			t &= 0x7f;
+		else
+			t |= 0x80;
+		pci_write_config_byte(pci_pmu, 0x7e, t);
+	}
+}
+
+void ddb5074_led_d3(int on)
+{
+	u8 t;
+
+	if (pci_pmu) {
+		pci_read_config_byte(pci_pmu, 0x7e, &t);
+		if (on)
+			t &= 0xbf;
+		else
+			t |= 0x40;
+		pci_write_config_byte(pci_pmu, 0x7e, t);
+	}
+}
diff --git a/arch/mips/ddb5xxx/ddb5476/Makefile b/arch/mips/ddb5xxx/ddb5476/Makefile
new file mode 100644
index 000000000000..61eec363cb02
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5476/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for the NEC DDB Vrc-5476 specific kernel interface routines
+# under Linux.
+#
+
+obj-y			+= setup.o irq.o int-handler.o nile4_pic.o vrc5476_irq.o
+obj-$(CONFIG_KGDB)	+= dbg_io.o
+
+EXTRA_AFLAGS := $(CFLAGS)
diff --git a/arch/mips/ddb5xxx/ddb5476/dbg_io.c b/arch/mips/ddb5xxx/ddb5476/dbg_io.c
new file mode 100644
index 000000000000..85e9e5013679
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5476/dbg_io.c
@@ -0,0 +1,136 @@
+/*
+ * kgdb io functions for DDB5476.  We use the second serial port.
+ *
+ * Copyright (C) 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * 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.
+ *
+ */
+
+/* ======================= CONFIG ======================== */
+
+/* [jsun] we use the second serial port for kdb */
+#define         BASE                    0xa60002f8
+#define         MAX_BAUD                115200
+
+/* distance in bytes between two serial registers */
+#define         REG_OFFSET              1
+
+/*
+ * 0 - kgdb does serial init
+ * 1 - kgdb skip serial init
+ */
+static int remoteDebugInitialized = 0;
+
+/*
+ * the default baud rate *if* kgdb does serial init
+ */
+#define		BAUD_DEFAULT		UART16550_BAUD_38400
+
+/* ======================= END OF CONFIG ======================== */
+
+typedef unsigned char uint8;
+typedef unsigned int uint32;
+
+#define         UART16550_BAUD_2400             2400
+#define         UART16550_BAUD_4800             4800
+#define         UART16550_BAUD_9600             9600
+#define         UART16550_BAUD_19200            19200
+#define         UART16550_BAUD_38400            38400
+#define         UART16550_BAUD_57600            57600
+#define         UART16550_BAUD_115200           115200
+
+#define         UART16550_PARITY_NONE           0
+#define         UART16550_PARITY_ODD            0x08
+#define         UART16550_PARITY_EVEN           0x18
+#define         UART16550_PARITY_MARK           0x28
+#define         UART16550_PARITY_SPACE          0x38
+
+#define         UART16550_DATA_5BIT             0x0
+#define         UART16550_DATA_6BIT             0x1
+#define         UART16550_DATA_7BIT             0x2
+#define         UART16550_DATA_8BIT             0x3
+
+#define         UART16550_STOP_1BIT             0x0
+#define         UART16550_STOP_2BIT             0x4
+
+/* register offset */
+#define         OFS_RCV_BUFFER          0
+#define         OFS_TRANS_HOLD          0
+#define         OFS_SEND_BUFFER         0
+#define         OFS_INTR_ENABLE         (1*REG_OFFSET)
+#define         OFS_INTR_ID             (2*REG_OFFSET)
+#define         OFS_DATA_FORMAT         (3*REG_OFFSET)
+#define         OFS_LINE_CONTROL        (3*REG_OFFSET)
+#define         OFS_MODEM_CONTROL       (4*REG_OFFSET)
+#define         OFS_RS232_OUTPUT        (4*REG_OFFSET)
+#define         OFS_LINE_STATUS         (5*REG_OFFSET)
+#define         OFS_MODEM_STATUS        (6*REG_OFFSET)
+#define         OFS_RS232_INPUT         (6*REG_OFFSET)
+#define         OFS_SCRATCH_PAD         (7*REG_OFFSET)
+
+#define         OFS_DIVISOR_LSB         (0*REG_OFFSET)
+#define         OFS_DIVISOR_MSB         (1*REG_OFFSET)
+
+
+/* memory-mapped read/write of the port */
+#define         UART16550_READ(y)    (*((volatile uint8*)(BASE + y)))
+#define         UART16550_WRITE(y, z)  ((*((volatile uint8*)(BASE + y))) = z)
+
+void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
+{
+        /* disable interrupts */
+        UART16550_WRITE(OFS_INTR_ENABLE, 0);
+
+        /* set up buad rate */
+        {
+                uint32 divisor;
+
+                /* set DIAB bit */
+                UART16550_WRITE(OFS_LINE_CONTROL, 0x80);
+
+                /* set divisor */
+                divisor = MAX_BAUD / baud;
+                UART16550_WRITE(OFS_DIVISOR_LSB, divisor & 0xff);
+                UART16550_WRITE(OFS_DIVISOR_MSB, (divisor & 0xff00) >> 8);
+
+                /* clear DIAB bit */
+                UART16550_WRITE(OFS_LINE_CONTROL, 0x0);
+        }
+
+        /* set data format */
+        UART16550_WRITE(OFS_DATA_FORMAT, data | parity | stop);
+}
+
+
+uint8 getDebugChar(void)
+{
+        if (!remoteDebugInitialized) {
+                remoteDebugInitialized = 1;
+                debugInit(BAUD_DEFAULT,
+                          UART16550_DATA_8BIT,
+                          UART16550_PARITY_NONE, UART16550_STOP_1BIT);
+        }
+
+        while ((UART16550_READ(OFS_LINE_STATUS) & 0x1) == 0);
+        return UART16550_READ(OFS_RCV_BUFFER);
+}
+
+
+int putDebugChar(uint8 byte)
+{
+        if (!remoteDebugInitialized) {
+                remoteDebugInitialized = 1;
+                debugInit(BAUD_DEFAULT,
+                          UART16550_DATA_8BIT,
+                          UART16550_PARITY_NONE, UART16550_STOP_1BIT);
+        }
+
+        while ((UART16550_READ(OFS_LINE_STATUS) & 0x20) == 0);
+        UART16550_WRITE(OFS_SEND_BUFFER, byte);
+        return 1;
+}
diff --git a/arch/mips/ddb5xxx/ddb5476/int-handler.S b/arch/mips/ddb5xxx/ddb5476/int-handler.S
new file mode 100644
index 000000000000..12c292e189ba
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5476/int-handler.S
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * First-level interrupt dispatcher for ddb5476
+ *
+ * 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.
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+#include <asm/ddb5xxx/ddb5476.h>
+
+/*
+ * first level interrupt dispatcher for ocelot board -
+ * We check for the timer first, then check PCI ints A and D.
+ * Then check for serial IRQ and fall through.
+ */
+	.align	5
+	NESTED(ddb5476_handle_int, PT_SIZE, sp)
+	SAVE_ALL
+	CLI
+	.set	at
+	.set	noreorder
+	mfc0	t0, CP0_CAUSE
+	mfc0	t2, CP0_STATUS
+
+	and	t0, t2
+
+        andi    t1, t0, STATUSF_IP7     /* cpu timer */
+        bnez    t1, ll_cpu_ip7
+        andi    t1, t0, STATUSF_IP2	/* vrc5476 & i8259 */
+        bnez    t1, ll_cpu_ip2
+        andi    t1, t0, STATUSF_IP3
+        bnez    t1, ll_cpu_ip3
+        andi    t1, t0, STATUSF_IP4
+        bnez    t1, ll_cpu_ip4
+        andi    t1, t0, STATUSF_IP5
+        bnez    t1, ll_cpu_ip5
+        andi    t1, t0, STATUSF_IP6
+        bnez    t1, ll_cpu_ip6
+        andi    t1, t0, STATUSF_IP0     /* software int 0 */
+        bnez    t1, ll_cpu_ip0
+        andi    t1, t0, STATUSF_IP1     /* software int 1 */
+        bnez    t1, ll_cpu_ip1
+        nop
+
+	.set	reorder
+
+	/* wrong alarm or masked ... */
+	// j	spurious_interrupt
+	move 	a0, sp
+	jal	vrc5476_irq_dispatch
+	j	ret_from_irq
+	nop
+
+	.align	5
+
+ll_cpu_ip0:
+	li	a0, CPU_IRQ_BASE + 0
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+ll_cpu_ip1:
+	li	a0, CPU_IRQ_BASE + 1
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+ll_cpu_ip2:		/* jump to second-level dispatching */
+	move	a0, sp
+	jal	vrc5476_irq_dispatch
+	j	ret_from_irq
+
+ll_cpu_ip3:
+	li	a0, CPU_IRQ_BASE + 3
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+ll_cpu_ip4:
+	li	a0, CPU_IRQ_BASE + 4
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+ll_cpu_ip5:
+	li	a0, CPU_IRQ_BASE + 5
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+ll_cpu_ip6:
+	li	a0, CPU_IRQ_BASE + 6
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+ll_cpu_ip7:
+	li	a0, CPU_IRQ_BASE + 7
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+	END(ddb5476_handle_int)
diff --git a/arch/mips/ddb5xxx/ddb5476/irq.c b/arch/mips/ddb5xxx/ddb5476/irq.c
new file mode 100644
index 000000000000..5388b5868c4a
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5476/irq.c
@@ -0,0 +1,143 @@
+/*
+ *  arch/mips/ddb5476/irq.c -- NEC DDB Vrc-5476 interrupt routines
+ *
+ *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
+ *                     Sony Software Development Center Europe (SDCE), Brussels
+ *
+ * Re-write the whole thing to use new irq.c file.
+ * Copyright (C) 2001 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ */
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+
+#include <asm/i8259.h>
+#include <asm/io.h>
+#include <asm/ptrace.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+#define M1543_PNP_CONFIG	0x03f0	/* PnP Config Port */
+#define M1543_PNP_INDEX		0x03f0	/* PnP Index Port */
+#define M1543_PNP_DATA		0x03f1	/* PnP Data Port */
+
+#define M1543_PNP_ALT_CONFIG	0x0370	/* Alternative PnP Config Port */
+#define M1543_PNP_ALT_INDEX	0x0370	/* Alternative PnP Index Port */
+#define M1543_PNP_ALT_DATA	0x0371	/* Alternative PnP Data Port */
+
+#define M1543_INT1_MASTER_CTRL	0x0020	/* INT_1 (master) Control Register */
+#define M1543_INT1_MASTER_MASK	0x0021	/* INT_1 (master) Mask Register */
+
+#define M1543_INT1_SLAVE_CTRL	0x00a0	/* INT_1 (slave) Control Register */
+#define M1543_INT1_SLAVE_MASK	0x00a1	/* INT_1 (slave) Mask Register */
+
+#define M1543_INT1_MASTER_ELCR	0x04d0	/* INT_1 (master) Edge/Level Control */
+#define M1543_INT1_SLAVE_ELCR	0x04d1	/* INT_1 (slave) Edge/Level Control */
+
+static void m1543_irq_setup(void)
+{
+	/*
+	 *  The ALI M1543 has 13 interrupt inputs, IRQ1..IRQ13.  Not all
+	 *  the possible IO sources in the M1543 are in use by us.  We will
+	 *  use the following mapping:
+	 *
+	 *      IRQ1  - keyboard (default set by M1543)
+	 *      IRQ3  - reserved for UART B (default set by M1543) (note that
+	 *              the schematics for the DDB Vrc-5476 board seem to
+	 *              indicate that IRQ3 is connected to the DS1386
+	 *              watchdog timer interrupt output so we might have
+	 *              a conflict)
+	 *      IRQ4  - reserved for UART A (default set by M1543)
+	 *      IRQ5  - parallel (default set by M1543)
+	 *      IRQ8  - DS1386 time of day (RTC) interrupt
+	 *      IRQ9  - USB (hardwired in ddb_setup)
+	 *      IRQ10 - PMU (hardwired in ddb_setup)
+	 *      IRQ12 - mouse
+	 *      IRQ14,15 - IDE controller (need to be confirmed, jsun)
+	 */
+
+	/*
+	 *  Assing mouse interrupt to IRQ12
+	 */
+
+	/* Enter configuration mode */
+	outb(0x51, M1543_PNP_CONFIG);
+	outb(0x23, M1543_PNP_CONFIG);
+
+	/* Select logical device 7 (Keyboard) */
+	outb(0x07, M1543_PNP_INDEX);
+	outb(0x07, M1543_PNP_DATA);
+
+	/* Select IRQ12 */
+	outb(0x72, M1543_PNP_INDEX);
+	outb(0x0c, M1543_PNP_DATA);
+
+	/* Leave configration mode */
+	outb(0xbb, M1543_PNP_CONFIG);
+}
+
+static void nile4_irq_setup(void)
+{
+	int i;
+
+	/* Map all interrupts to CPU int #0 (IP2) */
+	nile4_map_irq_all(0);
+
+	/* PCI INTA#-E# must be level triggered */
+	nile4_set_pci_irq_level_or_edge(0, 1);
+	nile4_set_pci_irq_level_or_edge(1, 1);
+	nile4_set_pci_irq_level_or_edge(2, 1);
+	nile4_set_pci_irq_level_or_edge(3, 1);
+
+	/* PCI INTA#, B#, D# must be active low, INTC# must be active high */
+	nile4_set_pci_irq_polarity(0, 0);
+	nile4_set_pci_irq_polarity(1, 0);
+	nile4_set_pci_irq_polarity(2, 1);
+	nile4_set_pci_irq_polarity(3, 0);
+
+	for (i = 0; i < 16; i++)
+		nile4_clear_irq(i);
+
+	/* Enable CPU int #0 */
+	nile4_enable_irq_output(0);
+
+	/* memory resource acquire in ddb_setup */
+}
+
+static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
+static struct irqaction irq_error = { no_action, 0, CPU_MASK_NONE, "error", NULL, NULL };
+
+extern asmlinkage void ddb5476_handle_int(void);
+extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
+extern void mips_cpu_irq_init(u32 irq_base);
+extern void vrc5476_irq_init(u32 irq_base);
+
+void __init arch_init_irq(void)
+{
+	/* hardware initialization */
+	nile4_irq_setup();
+	m1543_irq_setup();
+
+	/* controller setup */
+	init_i8259_irqs();
+	vrc5476_irq_init(VRC5476_IRQ_BASE);
+	mips_cpu_irq_init(CPU_IRQ_BASE);
+
+	/* setup cascade interrupts */
+	setup_irq(VRC5476_IRQ_BASE + VRC5476_I8259_CASCADE, &irq_cascade);
+	setup_irq(CPU_IRQ_BASE + CPU_VRC5476_CASCADE, &irq_cascade);
+
+	/* setup error interrupts for debugging */
+	setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_CPCE, &irq_error);
+	setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_CNTD, &irq_error);
+	setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_MCE, &irq_error);
+	setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_LBRT, &irq_error);
+	setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCIS, &irq_error);
+	setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCI, &irq_error);
+
+	/* setup the grandpa intr vector */
+	set_except_vector(0, ddb5476_handle_int);
+}
diff --git a/arch/mips/ddb5xxx/ddb5476/nile4_pic.c b/arch/mips/ddb5xxx/ddb5476/nile4_pic.c
new file mode 100644
index 000000000000..e930cee7944f
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5476/nile4_pic.c
@@ -0,0 +1,190 @@
+/*
+ *  arch/mips/ddb5476/nile4.c --
+ *  	low-level PIC code for NEC Vrc-5476 (Nile 4)
+ *
+ *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
+ *                     Sony Software Development Center Europe (SDCE), Brussels
+ *
+ *  Copyright 2001 MontaVista Software Inc.
+ *  Author: jsun@mvista.com or jsun@junsun.net
+ *
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#include <asm/addrspace.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+
+/*
+ *  Interrupt Programming
+ */
+void nile4_map_irq(int nile4_irq, int cpu_irq)
+{
+	u32 offset, t;
+
+	offset = DDB_INTCTRL;
+	if (nile4_irq >= 8) {
+		offset += 4;
+		nile4_irq -= 8;
+	}
+	t = ddb_in32(offset);
+	t &= ~(7 << (nile4_irq * 4));
+	t |= cpu_irq << (nile4_irq * 4);
+	ddb_out32(offset, t);
+}
+
+void nile4_map_irq_all(int cpu_irq)
+{
+	u32 all, t;
+
+	all = cpu_irq;
+	all |= all << 4;
+	all |= all << 8;
+	all |= all << 16;
+	t = ddb_in32(DDB_INTCTRL);
+	t &= 0x88888888;
+	t |= all;
+	ddb_out32(DDB_INTCTRL, t);
+	t = ddb_in32(DDB_INTCTRL + 4);
+	t &= 0x88888888;
+	t |= all;
+	ddb_out32(DDB_INTCTRL + 4, t);
+}
+
+void nile4_enable_irq(int nile4_irq)
+{
+	u32 offset, t;
+
+	offset = DDB_INTCTRL;
+	if (nile4_irq >= 8) {
+		offset += 4;
+		nile4_irq -= 8;
+	}
+	t = ddb_in32(offset);
+	t |= 8 << (nile4_irq * 4);
+	ddb_out32(offset, t);
+}
+
+void nile4_disable_irq(int nile4_irq)
+{
+	u32 offset, t;
+
+	offset = DDB_INTCTRL;
+	if (nile4_irq >= 8) {
+		offset += 4;
+		nile4_irq -= 8;
+	}
+	t = ddb_in32(offset);
+	t &= ~(8 << (nile4_irq * 4));
+	ddb_out32(offset, t);
+}
+
+void nile4_disable_irq_all(void)
+{
+	ddb_out32(DDB_INTCTRL, 0);
+	ddb_out32(DDB_INTCTRL + 4, 0);
+}
+
+u16 nile4_get_irq_stat(int cpu_irq)
+{
+	return ddb_in16(DDB_INTSTAT0 + cpu_irq * 2);
+}
+
+void nile4_enable_irq_output(int cpu_irq)
+{
+	u32 t;
+
+	t = ddb_in32(DDB_INTSTAT1 + 4);
+	t |= 1 << (16 + cpu_irq);
+	ddb_out32(DDB_INTSTAT1, t);
+}
+
+void nile4_disable_irq_output(int cpu_irq)
+{
+	u32 t;
+
+	t = ddb_in32(DDB_INTSTAT1 + 4);
+	t &= ~(1 << (16 + cpu_irq));
+	ddb_out32(DDB_INTSTAT1, t);
+}
+
+void nile4_set_pci_irq_polarity(int pci_irq, int high)
+{
+	u32 t;
+
+	t = ddb_in32(DDB_INTPPES);
+	if (high)
+		t &= ~(1 << (pci_irq * 2));
+	else
+		t |= 1 << (pci_irq * 2);
+	ddb_out32(DDB_INTPPES, t);
+}
+
+void nile4_set_pci_irq_level_or_edge(int pci_irq, int level)
+{
+	u32 t;
+
+	t = ddb_in32(DDB_INTPPES);
+	if (level)
+		t |= 2 << (pci_irq * 2);
+	else
+		t &= ~(2 << (pci_irq * 2));
+	ddb_out32(DDB_INTPPES, t);
+}
+
+void nile4_clear_irq(int nile4_irq)
+{
+	ddb_out32(DDB_INTCLR, 1 << nile4_irq);
+}
+
+void nile4_clear_irq_mask(u32 mask)
+{
+	ddb_out32(DDB_INTCLR, mask);
+}
+
+u8 nile4_i8259_iack(void)
+{
+	u8 irq;
+	u32 reg;
+
+	/* Set window 0 for interrupt acknowledge */
+	reg = ddb_in32(DDB_PCIINIT0);
+
+	ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IACK, 0, DDB_PCI_ACCESS_32);
+	irq = *(volatile u8 *) KSEG1ADDR(DDB_PCI_IACK_BASE);
+	/* restore window 0 for PCI I/O space */
+	// ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IO, 0, DDB_PCI_ACCESS_32);
+	ddb_out32(DDB_PCIINIT0, reg);
+
+	/* i8269.c set the base vector to be 0x0 */
+	return irq + I8259_IRQ_BASE;
+}
+
+#if defined(CONFIG_RUNTIME_DEBUG)
+void nile4_dump_irq_status(void)
+{
+	printk(KERN_DEBUG "
+	       CPUSTAT = %p:%p\n", (void *) ddb_in32(DDB_CPUSTAT + 4),
+	       (void *) ddb_in32(DDB_CPUSTAT));
+	printk(KERN_DEBUG "
+	       INTCTRL = %p:%p\n", (void *) ddb_in32(DDB_INTCTRL + 4),
+	       (void *) ddb_in32(DDB_INTCTRL));
+	printk(KERN_DEBUG
+	       "INTSTAT0 = %p:%p\n",
+	       (void *) ddb_in32(DDB_INTSTAT0 + 4),
+	       (void *) ddb_in32(DDB_INTSTAT0));
+	printk(KERN_DEBUG
+	       "INTSTAT1 = %p:%p\n",
+	       (void *) ddb_in32(DDB_INTSTAT1 + 4),
+	       (void *) ddb_in32(DDB_INTSTAT1));
+	printk(KERN_DEBUG
+	       "INTCLR = %p:%p\n", (void *) ddb_in32(DDB_INTCLR + 4),
+	       (void *) ddb_in32(DDB_INTCLR));
+	printk(KERN_DEBUG
+	       "INTPPES = %p:%p\n", (void *) ddb_in32(DDB_INTPPES + 4),
+	       (void *) ddb_in32(DDB_INTPPES));
+}
+#endif
diff --git a/arch/mips/ddb5xxx/ddb5476/setup.c b/arch/mips/ddb5xxx/ddb5476/setup.c
new file mode 100644
index 000000000000..71531f8146ea
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5476/setup.c
@@ -0,0 +1,297 @@
+/*
+ *  arch/mips/ddb5476/setup.c -- NEC DDB Vrc-5476 setup routines
+ *
+ *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
+ *                     Sony Software Development Center Europe (SDCE), Brussels
+ */
+#include <linux/init.h>
+#include <linux/kbd_ll.h>
+#include <linux/kernel.h>
+#include <linux/kdev_t.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/pci.h>
+
+#include <asm/addrspace.h>
+#include <asm/bcache.h>
+#include <asm/irq.h>
+#include <asm/reboot.h>
+#include <asm/gdb-stub.h>
+#include <asm/time.h>
+#include <asm/debug.h>
+#include <asm/traps.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+// #define USE_CPU_COUNTER_TIMER	/* whether we use cpu counter */
+
+#ifdef USE_CPU_COUNTER_TIMER
+
+#define CPU_COUNTER_FREQUENCY           83000000
+#else
+/* otherwise we use general purpose timer */
+#define TIMER_FREQUENCY			83000000
+#define TIMER_BASE			DDB_T2CTRL
+#define TIMER_IRQ			(VRC5476_IRQ_BASE + VRC5476_IRQ_GPT)
+#endif
+
+static void (*back_to_prom) (void) = (void (*)(void)) 0xbfc00000;
+
+static void ddb_machine_restart(char *command)
+{
+	u32 t;
+
+	/* PCI cold reset */
+	t = ddb_in32(DDB_PCICTRL + 4);
+	t |= 0x40000000;
+	ddb_out32(DDB_PCICTRL + 4, t);
+	/* CPU cold reset */
+	t = ddb_in32(DDB_CPUSTAT);
+	t |= 1;
+	ddb_out32(DDB_CPUSTAT, t);
+	/* Call the PROM */
+	back_to_prom();
+}
+
+static void ddb_machine_halt(void)
+{
+	printk(KERN_NOTICE "DDB Vrc-5476 halted.\n");
+	while (1);
+}
+
+static void ddb_machine_power_off(void)
+{
+	printk(KERN_NOTICE "DDB Vrc-5476 halted. Please turn off the power.\n");
+	while (1);
+}
+
+extern void rtc_ds1386_init(unsigned long base);
+
+static void __init ddb_time_init(void)
+{
+#if defined(USE_CPU_COUNTER_TIMER)
+	mips_hpt_frequency = CPU_COUNTER_FREQUENCY;
+#endif
+
+	/* we have ds1396 RTC chip */
+	rtc_ds1386_init(KSEG1ADDR(DDB_PCI_MEM_BASE));
+}
+
+
+extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
+static void __init ddb_timer_setup(struct irqaction *irq)
+{
+#if defined(USE_CPU_COUNTER_TIMER)
+
+	unsigned int count;
+
+	/* we are using the cpu counter for timer interrupts */
+	setup_irq(CPU_IRQ_BASE + 7, irq);
+
+	/* to generate the first timer interrupt */
+	count = read_c0_count();
+	write_c0_compare(count + 1000);
+
+#else
+
+	ddb_out32(TIMER_BASE, TIMER_FREQUENCY/HZ);
+	ddb_out32(TIMER_BASE+4, 0x1);	/* enable timer */
+	setup_irq(TIMER_IRQ, irq);
+#endif
+}
+
+static struct {
+	struct resource dma1;
+	struct resource timer;
+	struct resource rtc;
+	struct resource dma_page_reg;
+	struct resource dma2;
+} ddb5476_ioport = {
+	{
+	"dma1", 0x00, 0x1f, IORESOURCE_BUSY}, {
+	"timer", 0x40, 0x5f, IORESOURCE_BUSY}, {
+	"rtc", 0x70, 0x7f, IORESOURCE_BUSY}, {
+	"dma page reg", 0x80, 0x8f, IORESOURCE_BUSY}, {
+	"dma2", 0xc0, 0xdf, IORESOURCE_BUSY}
+};
+
+static struct {
+	struct resource nile4;
+} ddb5476_iomem = {
+	{ "Nile 4", DDB_BASE, DDB_BASE + DDB_SIZE - 1, IORESOURCE_BUSY}
+};
+
+
+static void ddb5476_board_init(void);
+
+static void __init ddb5476_setup(void)
+{
+	set_io_port_base(KSEG1ADDR(DDB_PCI_IO_BASE));
+
+	board_time_init = ddb_time_init;
+	board_timer_setup = ddb_timer_setup;
+
+	_machine_restart = ddb_machine_restart;
+	_machine_halt = ddb_machine_halt;
+	_machine_power_off = ddb_machine_power_off;
+
+	/* request io port/mem resources  */
+	if (request_resource(&ioport_resource, &ddb5476_ioport.dma1) ||
+	    request_resource(&ioport_resource, &ddb5476_ioport.timer) ||
+	    request_resource(&ioport_resource, &ddb5476_ioport.rtc) ||
+	    request_resource(&ioport_resource,
+			     &ddb5476_ioport.dma_page_reg)
+	    || request_resource(&ioport_resource, &ddb5476_ioport.dma2)
+	    || request_resource(&iomem_resource, &ddb5476_iomem.nile4)) {
+		printk
+		    ("ddb_setup - requesting oo port resources failed.\n");
+		for (;;);
+	}
+
+	/* Reboot on panic */
+	panic_timeout = 180;
+
+	/* [jsun] we need to set BAR0 so that SDRAM 0 appears at 0x0 in PCI */
+	/* *(long*)0xbfa00218 = 0x8; */
+
+	/* board initialization stuff */
+	ddb5476_board_init();
+}
+
+early_initcall(ddb5476_setup);
+
+/*
+ * We don't trust bios.  We essentially does hardware re-initialization
+ * as complete as possible, as far as we know we can safely do.
+ */
+static void ddb5476_board_init(void)
+{
+	/* ----------- setup PDARs ------------ */
+	/* check SDRAM0, whether we are on MEM bus does not matter */
+	db_assert((ddb_in32(DDB_SDRAM0) & 0xffffffef) ==
+		  ddb_calc_pdar(DDB_SDRAM_BASE, DDB_SDRAM_SIZE, 32, 0, 1));
+
+	/* SDRAM1 should be turned off.  What is this for anyway ? */
+	db_assert( (ddb_in32(DDB_SDRAM1) & 0xf) == 0);
+
+	/* flash 1&2, DDB status, DDB control */
+	ddb_set_pdar(DDB_DCS2, DDB_DCS2_BASE, DDB_DCS2_SIZE, 16, 0, 0);
+	ddb_set_pdar(DDB_DCS3, DDB_DCS3_BASE, DDB_DCS3_SIZE, 16, 0, 0);
+	ddb_set_pdar(DDB_DCS4, DDB_DCS4_BASE, DDB_DCS4_SIZE, 8, 0, 0);
+	ddb_set_pdar(DDB_DCS5, DDB_DCS5_BASE, DDB_DCS5_SIZE, 8, 0, 0);
+
+	/* shut off other pdar so they don't accidentally get into the way */
+	ddb_set_pdar(DDB_DCS6, 0xffffffff, 0, 32, 0, 0);
+	ddb_set_pdar(DDB_DCS7, 0xffffffff, 0, 32, 0, 0);
+	ddb_set_pdar(DDB_DCS8, 0xffffffff, 0, 32, 0, 0);
+
+	/* verify VRC5477 base addr */
+	/* don't care about some details */
+	db_assert((ddb_in32(DDB_INTCS) & 0xffffff0f) ==
+		  ddb_calc_pdar(DDB_INTCS_BASE, DDB_INTCS_SIZE, 8, 0, 0));
+
+	/* verify BOOT ROM addr */
+	/* don't care about some details */
+	db_assert((ddb_in32(DDB_BOOTCS) & 0xffffff0f) ==
+		  ddb_calc_pdar(DDB_BOOTCS_BASE, DDB_BOOTCS_SIZE, 8, 0, 0));
+
+	/* setup PCI windows - window1 for MEM/config, window0 for IO */
+	ddb_set_pdar(DDB_PCIW0, DDB_PCI_IO_BASE, DDB_PCI_IO_SIZE, 32, 0, 1);
+	ddb_set_pmr(DDB_PCIINIT0, DDB_PCICMD_IO, 0, DDB_PCI_ACCESS_32);
+
+	ddb_set_pdar(DDB_PCIW1, DDB_PCI_MEM_BASE, DDB_PCI_MEM_SIZE, 32, 0, 1);
+	ddb_set_pmr(DDB_PCIINIT1, DDB_PCICMD_MEM, DDB_PCI_MEM_BASE, DDB_PCI_ACCESS_32);
+
+	/* ----------- setup PDARs ------------ */
+	/* this is problematic - it will reset Aladin which cause we loose
+	 * serial port, and we don't know how to set up Aladin chip again.
+	 */
+	// ddb_pci_reset_bus();
+
+	ddb_out32(DDB_BAR0, 0x00000008);
+
+	ddb_out32(DDB_BARC, 0xffffffff);
+	ddb_out32(DDB_BARB, 0xffffffff);
+	ddb_out32(DDB_BAR1, 0xffffffff);
+	ddb_out32(DDB_BAR2, 0xffffffff);
+	ddb_out32(DDB_BAR3, 0xffffffff);
+	ddb_out32(DDB_BAR4, 0xffffffff);
+	ddb_out32(DDB_BAR5, 0xffffffff);
+	ddb_out32(DDB_BAR6, 0xffffffff);
+	ddb_out32(DDB_BAR7, 0xffffffff);
+	ddb_out32(DDB_BAR8, 0xffffffff);
+
+	/* ----------- switch PCI1 to PCI CONFIG space  ------------ */
+	ddb_set_pdar(DDB_PCIW1, DDB_PCI_CONFIG_BASE, DDB_PCI_CONFIG_SIZE, 32, 0, 1);
+	ddb_set_pmr(DDB_PCIINIT1, DDB_PCICMD_CFG, 0x0, DDB_PCI_ACCESS_32);
+
+	/* ----- M1543 PCI setup ------ */
+
+	/* we know M1543 PCI-ISA controller is at addr:18 */
+	/* xxxx1010 makes USB at addr:13 and PMU at addr:14 */
+	*(volatile unsigned char *) 0xa8040072 &= 0xf0;
+	*(volatile unsigned char *) 0xa8040072 |= 0xa;
+
+	/* setup USB interrupt to IRQ 9, (bit 0:3 - 0001)
+	 * no IOCHRDY signal, (bit 7 - 1)
+	 * M1543C & M7101 VID and Subsys Device ID are read-only (bit 6 - 1)
+	 * Make USB Master INTAJ level to edge conversion (bit 4 - 1)
+	 */
+	*(unsigned char *) 0xa8040074 = 0xd1;
+
+	/* setup PMU(SCI to IRQ 10 (bit 0:3 - 0011)
+	 * SCI routing to IRQ 13 disabled (bit 7 - 1)
+	 * SCI interrupt level to edge conversion bypassed (bit 4 - 0)
+	 */
+	*(unsigned char *) 0xa8040076 = 0x83;
+
+	/* setup IDE controller
+	 * enable IDE controller (bit 6 - 1)
+	 * IDE IDSEL to be addr:24 (bit 4:5 - 11)
+	 * no IDE ATA Secondary Bus Signal Pad Control (bit 3 - 0)
+	 * no IDE ATA Primary Bus Signal Pad Control (bit 2 - 0)
+	 * primary IRQ is 14, secondary is 15 (bit 1:0 - 01
+	 */
+	// *(unsigned char*)0xa8040058 = 0x71;
+	// *(unsigned char*)0xa8040058 = 0x79;
+	// *(unsigned char*)0xa8040058 = 0x74;              // use SIRQ, primary tri-state
+	*(unsigned char *) 0xa8040058 = 0x75;	// primary tri-state
+
+#if 0
+	/* this is not necessary if M5229 does not use SIRQ */
+	*(unsigned char *) 0xa8040044 = 0x0d;	// primary to IRQ 14
+	*(unsigned char *) 0xa8040075 = 0x0d;	// secondary to IRQ 14
+#endif
+
+	/* enable IDE in the M5229 config register 0x50 (bit 0 - 1) */
+	/* M5229 IDSEL is addr:24; see above setting */
+	*(unsigned char *) 0xa9000050 |= 0x1;
+
+	/* enable bus master (bit 2)  and IO decoding  (bit 0) */
+	*(unsigned char *) 0xa9000004 |= 0x5;
+
+	/* enable native, copied from arch/ppc/k2boot/head.S */
+	/* TODO - need volatile, need to be portable */
+	*(unsigned char *) 0xa9000009 = 0xff;
+
+	/* ----- end of M1543 PCI setup ------ */
+
+	/* ----- reset on-board ether chip  ------ */
+	*((volatile u32 *) 0xa8020004) |= 1;	/* decode I/O */
+	*((volatile u32 *) 0xa8020010) = 0;	/* set BAR address */
+
+	/* send reset command */
+	*((volatile u32 *) 0xa6000000) = 1;	/* do a soft reset */
+
+	/* disable ether chip */
+	*((volatile u32 *) 0xa8020004) = 0;	/* disable any decoding */
+
+	/* put it into sleep */
+	*((volatile u32 *) 0xa8020040) = 0x80000000;
+
+	/* ----- end of reset on-board ether chip  ------ */
+
+	/* ----------- switch PCI1 back to PCI MEM space  ------------ */
+	ddb_set_pdar(DDB_PCIW1, DDB_PCI_MEM_BASE, DDB_PCI_MEM_SIZE, 32, 0, 1);
+	ddb_set_pmr(DDB_PCIINIT1, DDB_PCICMD_MEM, DDB_PCI_MEM_BASE, DDB_PCI_ACCESS_32);
+}
diff --git a/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c b/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c
new file mode 100644
index 000000000000..a77682be01ac
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c
@@ -0,0 +1,112 @@
+/*
+ * The irq controller for vrc5476.
+ *
+ * Copyright (C) 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * 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.
+ *
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+
+#include <asm/system.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+static int irq_base;
+
+static void vrc5476_irq_enable(uint irq)
+{
+	nile4_enable_irq(irq - irq_base);
+}
+
+static void vrc5476_irq_disable(uint irq)
+{
+	nile4_disable_irq(irq - irq_base);
+}
+
+static unsigned int vrc5476_irq_startup(uint irq)
+{
+	nile4_enable_irq(irq - irq_base);
+	return 0;
+}
+
+#define vrc5476_irq_shutdown	vrc5476_irq_disable
+
+static void vrc5476_irq_ack(uint irq)
+{
+	nile4_clear_irq(irq - irq_base);
+	nile4_disable_irq(irq - irq_base);
+}
+
+static void vrc5476_irq_end(uint irq)
+{
+	if(!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+		vrc5476_irq_enable(irq);
+}
+
+static hw_irq_controller vrc5476_irq_controller = {
+	"vrc5476",
+	vrc5476_irq_startup,
+	vrc5476_irq_shutdown,
+	vrc5476_irq_enable,
+	vrc5476_irq_disable,
+	vrc5476_irq_ack,
+	vrc5476_irq_end,
+	NULL				/* no affinity stuff for UP */
+};
+
+void __init
+vrc5476_irq_init(u32 base)
+{
+	u32 i;
+
+	irq_base = base;
+	for (i= base; i< base + NUM_VRC5476_IRQ; i++) {
+		irq_desc[i].status = IRQ_DISABLED;
+		irq_desc[i].action = NULL;
+		irq_desc[i].depth = 1;
+		irq_desc[i].handler = &vrc5476_irq_controller;
+	}
+}
+
+
+asmlinkage void
+vrc5476_irq_dispatch(struct pt_regs *regs)
+{
+	extern void spurious_interrupt(void);
+
+	u32 mask;
+	int nile4_irq;
+
+	mask = nile4_get_irq_stat(0);
+
+	/* quick check for possible time interrupt */
+	if (mask & (1 << VRC5476_IRQ_GPT)) {
+		do_IRQ(VRC5476_IRQ_BASE + VRC5476_IRQ_GPT, regs);
+		return;
+	}
+
+	/* check for i8259 interrupts */
+	if (mask & (1 << VRC5476_I8259_CASCADE)) {
+		int i8259_irq = nile4_i8259_iack();
+		do_IRQ(I8259_IRQ_BASE + i8259_irq, regs);
+		return;
+	}
+
+	/* regular nile4 interrupts (we should not really have any */
+	for (nile4_irq = 0; mask; nile4_irq++, mask >>= 1) {
+		if (mask & 1) {
+			do_IRQ(VRC5476_IRQ_BASE + nile4_irq, regs);
+			return;
+		}
+	}
+	spurious_interrupt();
+}
diff --git a/arch/mips/ddb5xxx/ddb5477/Makefile b/arch/mips/ddb5xxx/ddb5477/Makefile
new file mode 100644
index 000000000000..b79b43c9f93b
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5477/Makefile
@@ -0,0 +1,10 @@
+#
+# Makefile for NEC DDB-Vrc5477 board
+#
+
+obj-y	 		+= int-handler.o irq.o irq_5477.o setup.o lcd44780.o
+
+obj-$(CONFIG_RUNTIME_DEBUG) 	+= debug.o
+obj-$(CONFIG_KGDB)		+= kgdb_io.o
+
+EXTRA_AFLAGS := $(CFLAGS)
diff --git a/arch/mips/ddb5xxx/ddb5477/debug.c b/arch/mips/ddb5xxx/ddb5477/debug.c
new file mode 100644
index 000000000000..68919d5f8ffd
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5477/debug.c
@@ -0,0 +1,160 @@
+/***********************************************************************
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * arch/mips/ddb5xxx/ddb5477/debug.c
+ *     vrc5477 specific debug routines.
+ *
+ * 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.
+ *
+ ***********************************************************************
+ */
+
+#include <linux/kernel.h>
+
+#include <asm/mipsregs.h>
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+typedef struct {
+       const char *regname;
+       unsigned regaddr;
+} Register;
+
+void jsun_show_regs(char *name, Register *regs)
+{
+	int i;
+
+	printk("\nshow regs: %s\n", name);
+	for(i=0;regs[i].regname!= NULL; i++) {
+		printk("%-16s= %08x\t\t(@%08x)\n",
+		       regs[i].regname,
+		       *(unsigned *)(regs[i].regaddr),
+		       regs[i].regaddr);
+	}
+}
+
+static Register int_regs[] = {
+	{"DDB_INTCTRL0", DDB_BASE + DDB_INTCTRL0},
+	{"DDB_INTCTRL1", DDB_BASE + DDB_INTCTRL1},
+	{"DDB_INTCTRL2", DDB_BASE + DDB_INTCTRL2},
+	{"DDB_INTCTRL3", DDB_BASE + DDB_INTCTRL3},
+	{"DDB_INT0STAT", DDB_BASE + DDB_INT0STAT},
+	{"DDB_INT1STAT", DDB_BASE + DDB_INT1STAT},
+	{"DDB_INT2STAT", DDB_BASE + DDB_INT2STAT},
+	{"DDB_INT3STAT", DDB_BASE + DDB_INT3STAT},
+	{"DDB_INT4STAT", DDB_BASE + DDB_INT4STAT},
+	{"DDB_NMISTAT", DDB_BASE + DDB_NMISTAT},
+	{"DDB_INTPPES0", DDB_BASE + DDB_INTPPES0},
+	{"DDB_INTPPES1", DDB_BASE + DDB_INTPPES1},
+	{NULL, 0x0}
+};
+
+void vrc5477_show_int_regs()
+{
+	jsun_show_regs("interrupt registers", int_regs);
+	printk("CPU CAUSE = %08x\n", read_c0_cause());
+	printk("CPU STATUS = %08x\n", read_c0_status());
+}
+static Register pdar_regs[] = {
+        {"DDB_SDRAM0", DDB_BASE + DDB_SDRAM0},
+        {"DDB_SDRAM1", DDB_BASE + DDB_SDRAM1},
+        {"DDB_LCS0", DDB_BASE + DDB_LCS0},
+        {"DDB_LCS1", DDB_BASE + DDB_LCS1},
+        {"DDB_LCS2", DDB_BASE + DDB_LCS2},
+        {"DDB_INTCS", DDB_BASE + DDB_INTCS},
+        {"DDB_BOOTCS", DDB_BASE + DDB_BOOTCS},
+        {"DDB_PCIW0", DDB_BASE + DDB_PCIW0},
+        {"DDB_PCIW1", DDB_BASE + DDB_PCIW1},
+        {"DDB_IOPCIW0", DDB_BASE + DDB_IOPCIW0},
+        {"DDB_IOPCIW1", DDB_BASE + DDB_IOPCIW1},
+        {NULL, 0x0}
+};
+void vrc5477_show_pdar_regs(void)
+{
+        jsun_show_regs("PDAR regs", pdar_regs);
+}
+
+static Register bar_regs[] = {
+        {"DDB_BARC0", DDB_BASE + DDB_BARC0},
+        {"DDB_BARM010", DDB_BASE + DDB_BARM010},
+        {"DDB_BARM230", DDB_BASE + DDB_BARM230},
+        {"DDB_BAR00", DDB_BASE + DDB_BAR00},
+        {"DDB_BAR10", DDB_BASE + DDB_BAR10},
+        {"DDB_BAR20", DDB_BASE + DDB_BAR20},
+        {"DDB_BAR30", DDB_BASE + DDB_BAR30},
+        {"DDB_BAR40", DDB_BASE + DDB_BAR40},
+        {"DDB_BAR50", DDB_BASE + DDB_BAR50},
+        {"DDB_BARB0", DDB_BASE + DDB_BARB0},
+        {"DDB_BARC1", DDB_BASE + DDB_BARC1},
+        {"DDB_BARM011", DDB_BASE + DDB_BARM011},
+        {"DDB_BARM231", DDB_BASE + DDB_BARM231},
+        {"DDB_BAR01", DDB_BASE + DDB_BAR01},
+        {"DDB_BAR11", DDB_BASE + DDB_BAR11},
+        {"DDB_BAR21", DDB_BASE + DDB_BAR21},
+        {"DDB_BAR31", DDB_BASE + DDB_BAR31},
+        {"DDB_BAR41", DDB_BASE + DDB_BAR41},
+        {"DDB_BAR51", DDB_BASE + DDB_BAR51},
+        {"DDB_BARB1", DDB_BASE + DDB_BARB1},
+        {NULL, 0x0}
+};
+void vrc5477_show_bar_regs(void)
+{
+        jsun_show_regs("BAR regs", bar_regs);
+}
+
+static Register pci_regs[] = {
+        {"DDB_PCIW0", DDB_BASE + DDB_PCIW0},
+        {"DDB_PCIW1", DDB_BASE + DDB_PCIW1},
+        {"DDB_PCIINIT00", DDB_BASE + DDB_PCIINIT00},
+        {"DDB_PCIINIT10", DDB_BASE + DDB_PCIINIT10},
+        {"DDB_PCICTL0_L", DDB_BASE + DDB_PCICTL0_L},
+        {"DDB_PCICTL0_H", DDB_BASE + DDB_PCICTL0_H},
+        {"DDB_PCIARB0_L", DDB_BASE + DDB_PCIARB0_L},
+        {"DDB_PCIARB0_H", DDB_BASE + DDB_PCIARB0_H},
+        {"DDB_PCISWP0", DDB_BASE + DDB_PCISWP0},
+        {"DDB_PCIERR0", DDB_BASE + DDB_PCIERR0},
+        {"DDB_IOPCIW0", DDB_BASE + DDB_IOPCIW0},
+        {"DDB_IOPCIW1", DDB_BASE + DDB_IOPCIW1},
+        {"DDB_PCIINIT01", DDB_BASE + DDB_PCIINIT01},
+        {"DDB_PCIINIT11", DDB_BASE + DDB_PCIINIT11},
+        {"DDB_PCICTL1_L", DDB_BASE + DDB_PCICTL1_L},
+        {"DDB_PCICTL1_H", DDB_BASE + DDB_PCICTL1_H},
+        {"DDB_PCIARB1_L", DDB_BASE + DDB_PCIARB1_L},
+        {"DDB_PCIARB1_H", DDB_BASE + DDB_PCIARB1_H},
+        {"DDB_PCISWP1", DDB_BASE + DDB_PCISWP1},
+        {"DDB_PCIERR1", DDB_BASE + DDB_PCIERR1},
+        {NULL, 0x0}
+};
+void vrc5477_show_pci_regs(void)
+{
+        jsun_show_regs("PCI regs", pci_regs);
+}
+
+static Register lb_regs[] = {
+        {"DDB_LCNFG", DDB_BASE + DDB_LCNFG},
+        {"DDB_LCST0", DDB_BASE + DDB_LCST0},
+        {"DDB_LCST1", DDB_BASE + DDB_LCST1},
+        {"DDB_LCST2", DDB_BASE + DDB_LCST2},
+        {"DDB_ERRADR", DDB_BASE + DDB_ERRADR},
+        {"DDB_ERRCS", DDB_BASE + DDB_ERRCS},
+        {"DDB_BTM", DDB_BASE + DDB_BTM},
+        {"DDB_BCST", DDB_BASE + DDB_BCST},
+        {NULL, 0x0}
+};
+void vrc5477_show_lb_regs(void)
+{
+        jsun_show_regs("Local Bus regs", lb_regs);
+}
+
+void vrc5477_show_all_regs(void)
+{
+	vrc5477_show_pdar_regs();
+	vrc5477_show_pci_regs();
+	vrc5477_show_bar_regs();
+	vrc5477_show_int_regs();
+	vrc5477_show_lb_regs();
+}
diff --git a/arch/mips/ddb5xxx/ddb5477/int-handler.S b/arch/mips/ddb5xxx/ddb5477/int-handler.S
new file mode 100644
index 000000000000..a2502a14400e
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5477/int-handler.S
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * First-level interrupt dispatcher for ddb5477
+ *
+ * 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.
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+#include <asm/ddb5xxx/ddb5477.h>
+
+/*
+ * first level interrupt dispatcher for ocelot board -
+ * We check for the timer first, then check PCI ints A and D.
+ * Then check for serial IRQ and fall through.
+ */
+	.align	5
+	NESTED(ddb5477_handle_int, PT_SIZE, sp)
+	SAVE_ALL
+	CLI
+	.set	at
+	.set	noreorder
+	mfc0	t0, CP0_CAUSE
+	mfc0	t2, CP0_STATUS
+
+	and	t0, t2
+
+	andi	t1, t0, STATUSF_IP7	/* cpu timer */
+	bnez	t1, ll_cputimer_irq
+	andi	t1, t0, (STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6 )
+	bnez	t1, ll_vrc5477_irq
+	andi	t1, t0, STATUSF_IP0	/* software int 0 */
+	bnez	t1, ll_cpu_ip0
+	andi	t1, t0, STATUSF_IP1	/* software int 1 */
+	bnez	t1, ll_cpu_ip1
+	nop
+	.set	reorder
+
+	/* wrong alarm or masked ... */
+	j	spurious_interrupt
+	nop
+	END(ddb5477_handle_int)
+
+	.align	5
+
+ll_vrc5477_irq:
+	move	a0, sp
+	jal	vrc5477_irq_dispatch
+	j	ret_from_irq
+
+ll_cputimer_irq:
+	li	a0, CPU_IRQ_BASE + 7
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+
+ll_cpu_ip0:
+	li	a0, CPU_IRQ_BASE + 0
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+ll_cpu_ip1:
+	li	a0, CPU_IRQ_BASE + 1
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
diff --git a/arch/mips/ddb5xxx/ddb5477/irq.c b/arch/mips/ddb5xxx/ddb5477/irq.c
new file mode 100644
index 000000000000..5f027bfa4af8
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5477/irq.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ *  arch/mips/ddb5xxx/ddb5477/irq.c
+ *     The irq setup and misc routines for DDB5476.
+ *
+ * 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.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+
+#include <asm/i8259.h>
+#include <asm/system.h>
+#include <asm/mipsregs.h>
+#include <asm/debug.h>
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+
+/*
+ * IRQ mapping
+ *
+ *  0-7: 8 CPU interrupts
+ *	0 -	software interrupt 0
+ *	1 - 	software interrupt 1
+ *	2 - 	most Vrc5477 interrupts are routed to this pin
+ *	3 - 	(optional) some other interrupts routed to this pin for debugg
+ *	4 - 	not used
+ *	5 - 	not used
+ *	6 - 	not used
+ *	7 - 	cpu timer (used by default)
+ *
+ *  8-39: 32 Vrc5477 interrupt sources
+ *	(refer to the Vrc5477 manual)
+ */
+
+#define	PCI0			DDB_INTPPES0
+#define	PCI1			DDB_INTPPES1
+
+#define	ACTIVE_LOW		1
+#define	ACTIVE_HIGH		0
+
+#define	LEVEL_SENSE		2
+#define	EDGE_TRIGGER		0
+
+#define	INTA			0
+#define	INTB			1
+#define	INTC			2
+#define	INTD			3
+#define	INTE			4
+
+static inline void
+set_pci_int_attr(u32 pci, u32 intn, u32 active, u32 trigger)
+{
+	u32 reg_value;
+	u32 reg_bitmask;
+
+	reg_value = ddb_in32(pci);
+	reg_bitmask = 0x3 << (intn * 2);
+
+	reg_value &= ~reg_bitmask;
+	reg_value |= (active | trigger) << (intn * 2);
+	ddb_out32(pci, reg_value);
+}
+
+extern void vrc5477_irq_init(u32 base);
+extern void mips_cpu_irq_init(u32 base);
+extern asmlinkage void ddb5477_handle_int(void);
+extern int setup_irq(unsigned int irq, struct irqaction *irqaction);  
+static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
+
+void __init arch_init_irq(void)
+{
+	/* by default, we disable all interrupts and route all vrc5477
+	 * interrupts to pin 0 (irq 2) */
+	ddb_out32(DDB_INTCTRL0, 0);
+	ddb_out32(DDB_INTCTRL1, 0);
+	ddb_out32(DDB_INTCTRL2, 0);
+	ddb_out32(DDB_INTCTRL3, 0);
+
+	clear_c0_status(0xff00);
+	set_c0_status(0x0400);
+
+	/* setup PCI interrupt attributes */
+	set_pci_int_attr(PCI0, INTA, ACTIVE_LOW, LEVEL_SENSE);
+	set_pci_int_attr(PCI0, INTB, ACTIVE_LOW, LEVEL_SENSE);
+	if (mips_machtype == MACH_NEC_ROCKHOPPERII) 
+		set_pci_int_attr(PCI0, INTC, ACTIVE_HIGH, LEVEL_SENSE);
+	else
+		set_pci_int_attr(PCI0, INTC, ACTIVE_LOW, LEVEL_SENSE);
+	set_pci_int_attr(PCI0, INTD, ACTIVE_LOW, LEVEL_SENSE);
+	set_pci_int_attr(PCI0, INTE, ACTIVE_LOW, LEVEL_SENSE);
+
+	set_pci_int_attr(PCI1, INTA, ACTIVE_LOW, LEVEL_SENSE);
+	set_pci_int_attr(PCI1, INTB, ACTIVE_LOW, LEVEL_SENSE);
+	set_pci_int_attr(PCI1, INTC, ACTIVE_LOW, LEVEL_SENSE);
+	set_pci_int_attr(PCI1, INTD, ACTIVE_LOW, LEVEL_SENSE);
+	set_pci_int_attr(PCI1, INTE, ACTIVE_LOW, LEVEL_SENSE);
+
+	/*
+	 * for debugging purpose, we enable several error interrupts
+	 * and route them to pin 1. (IP3)
+	 */
+	/* cpu parity check - 0 */
+	ll_vrc5477_irq_route(0, 1); ll_vrc5477_irq_enable(0);
+	/* cpu no-target decode - 1 */
+	ll_vrc5477_irq_route(1, 1); ll_vrc5477_irq_enable(1);
+	/* local bus read time-out - 7 */
+	ll_vrc5477_irq_route(7, 1); ll_vrc5477_irq_enable(7);
+	/* PCI SERR# - 14 */
+	ll_vrc5477_irq_route(14, 1); ll_vrc5477_irq_enable(14);
+	/* PCI internal error - 15 */
+	ll_vrc5477_irq_route(15, 1); ll_vrc5477_irq_enable(15);
+	/* IOPCI SERR# - 30 */
+	ll_vrc5477_irq_route(30, 1); ll_vrc5477_irq_enable(30);
+	/* IOPCI internal error - 31 */
+	ll_vrc5477_irq_route(31, 1); ll_vrc5477_irq_enable(31);
+
+	/* init all controllers */
+	init_i8259_irqs();
+	mips_cpu_irq_init(CPU_IRQ_BASE);
+	vrc5477_irq_init(VRC5477_IRQ_BASE);
+
+
+	/* setup cascade interrupts */
+	setup_irq(VRC5477_IRQ_BASE + VRC5477_I8259_CASCADE, &irq_cascade);
+	setup_irq(CPU_IRQ_BASE + CPU_VRC5477_CASCADE, &irq_cascade);      
+
+	/* hook up the first-level interrupt handler */
+	set_except_vector(0, ddb5477_handle_int);
+}
+
+u8 i8259_interrupt_ack(void)
+{
+	u8 irq;
+	u32 reg;
+
+	/* Set window 0 for interrupt acknowledge */
+	reg = ddb_in32(DDB_PCIINIT10);
+
+	ddb_set_pmr(DDB_PCIINIT10, DDB_PCICMD_IACK, 0, DDB_PCI_ACCESS_32);
+	irq = *(volatile u8 *) KSEG1ADDR(DDB_PCI_IACK_BASE);
+	ddb_out32(DDB_PCIINIT10, reg);
+
+	/* i8259.c set the base vector to be 0x0 */
+	return irq + I8259_IRQ_BASE;
+}
+/*
+ * the first level int-handler will jump here if it is a vrc5477 irq
+ */
+#define	NUM_5477_IRQS	32
+asmlinkage void
+vrc5477_irq_dispatch(struct pt_regs *regs)
+{
+	u32 intStatus;
+	u32 bitmask;
+	u32 i;
+
+	db_assert(ddb_in32(DDB_INT2STAT) == 0);
+	db_assert(ddb_in32(DDB_INT3STAT) == 0);
+	db_assert(ddb_in32(DDB_INT4STAT) == 0);
+	db_assert(ddb_in32(DDB_NMISTAT) == 0);
+
+	if (ddb_in32(DDB_INT1STAT) != 0) {
+#if defined(CONFIG_RUNTIME_DEBUG)
+		vrc5477_show_int_regs();
+#endif
+		panic("error interrupt has happened.");
+	}
+
+	intStatus = ddb_in32(DDB_INT0STAT);
+
+	if (mips_machtype == MACH_NEC_ROCKHOPPERII) {
+		/* check for i8259 interrupts */
+		if (intStatus & (1 << VRC5477_I8259_CASCADE)) {
+			int i8259_irq = i8259_interrupt_ack();
+			do_IRQ(I8259_IRQ_BASE + i8259_irq, regs);
+			return;
+		}
+	}
+
+	for (i=0, bitmask=1; i<= NUM_5477_IRQS; bitmask <<=1, i++) {
+		/* do we need to "and" with the int mask? */
+		if (intStatus & bitmask) {
+			do_IRQ(VRC5477_IRQ_BASE + i, regs);
+			return;
+		}
+	}
+}
diff --git a/arch/mips/ddb5xxx/ddb5477/irq_5477.c b/arch/mips/ddb5xxx/ddb5477/irq_5477.c
new file mode 100644
index 000000000000..0d5e706207ec
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5477/irq_5477.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ *  arch/mips/ddb5xxx/ddb5477/irq_5477.c
+ *     This file defines the irq handler for Vrc5477.
+ *
+ * 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.
+ *
+ */
+
+/*
+ * Vrc5477 defines 32 IRQs.
+ *
+ * This file exports one function:
+ *	vrc5477_irq_init(u32 irq_base);
+ */
+
+#include <linux/interrupt.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+
+#include <asm/debug.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+/* number of total irqs supported by Vrc5477 */
+#define	NUM_5477_IRQ		32
+
+static int vrc5477_irq_base = -1;
+
+
+static void
+vrc5477_irq_enable(unsigned int irq)
+{
+	db_assert(vrc5477_irq_base != -1);
+	db_assert(irq >= vrc5477_irq_base);
+	db_assert(irq < vrc5477_irq_base+ NUM_5477_IRQ);
+
+	ll_vrc5477_irq_enable(irq - vrc5477_irq_base);
+}
+
+static void
+vrc5477_irq_disable(unsigned int irq)
+{
+	db_assert(vrc5477_irq_base != -1);
+	db_assert(irq >= vrc5477_irq_base);
+	db_assert(irq < vrc5477_irq_base + NUM_5477_IRQ);
+
+	ll_vrc5477_irq_disable(irq - vrc5477_irq_base);
+}
+
+static unsigned int vrc5477_irq_startup(unsigned int irq)
+{
+	vrc5477_irq_enable(irq);
+	return 0;
+}
+
+#define	vrc5477_irq_shutdown	vrc5477_irq_disable
+
+static void
+vrc5477_irq_ack(unsigned int irq)
+{
+	db_assert(vrc5477_irq_base != -1);
+	db_assert(irq >= vrc5477_irq_base);
+	db_assert(irq < vrc5477_irq_base+ NUM_5477_IRQ);
+
+	/* clear the interrupt bit */
+	/* some irqs require the driver to clear the sources */
+	ddb_out32(DDB_INTCLR32, 1 << (irq - vrc5477_irq_base));
+
+	/* disable interrupt - some handler will re-enable the irq
+	 * and if the interrupt is leveled, we will have infinite loop
+	 */
+	ll_vrc5477_irq_disable(irq - vrc5477_irq_base);
+}
+
+static void
+vrc5477_irq_end(unsigned int irq)
+{
+	db_assert(vrc5477_irq_base != -1);
+	db_assert(irq >= vrc5477_irq_base);
+	db_assert(irq < vrc5477_irq_base + NUM_5477_IRQ);
+
+	if(!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+		ll_vrc5477_irq_enable( irq - vrc5477_irq_base);
+}
+
+hw_irq_controller vrc5477_irq_controller = {
+	"vrc5477_irq",
+	vrc5477_irq_startup,
+	vrc5477_irq_shutdown,
+	vrc5477_irq_enable,
+	vrc5477_irq_disable,
+	vrc5477_irq_ack,
+	vrc5477_irq_end,
+	NULL			/* no affinity stuff for UP */
+};
+
+void __init vrc5477_irq_init(u32 irq_base)
+{
+	u32 i;
+
+	for (i= irq_base; i< irq_base+ NUM_5477_IRQ; i++) {
+		irq_desc[i].status = IRQ_DISABLED;
+		irq_desc[i].action = NULL;
+		irq_desc[i].depth = 1;
+		irq_desc[i].handler = &vrc5477_irq_controller;
+	}
+
+	vrc5477_irq_base = irq_base;
+}
+
+void ll_vrc5477_irq_route(int vrc5477_irq, int ip)
+{
+	u32 reg_value;
+	u32 reg_bitmask;
+	u32 reg_index;
+
+	db_assert(vrc5477_irq >= 0);
+	db_assert(vrc5477_irq < NUM_5477_IRQ);
+	db_assert(ip >= 0);
+	db_assert((ip < 5) || (ip == 6));
+
+	reg_index = DDB_INTCTRL0 + vrc5477_irq/8*4;
+	reg_value = ddb_in32(reg_index);
+	reg_bitmask = 7 << (vrc5477_irq % 8 * 4);
+	reg_value &= ~reg_bitmask;
+	reg_value |= ip << (vrc5477_irq % 8 * 4);
+	ddb_out32(reg_index, reg_value);
+}
+
+void ll_vrc5477_irq_enable(int vrc5477_irq)
+{
+	u32 reg_value;
+	u32 reg_bitmask;
+	u32 reg_index;
+
+	db_assert(vrc5477_irq >= 0);
+	db_assert(vrc5477_irq < NUM_5477_IRQ);
+
+	reg_index = DDB_INTCTRL0 + vrc5477_irq/8*4;
+	reg_value = ddb_in32(reg_index);
+	reg_bitmask = 8 << (vrc5477_irq % 8 * 4);
+	db_assert((reg_value & reg_bitmask) == 0);
+	ddb_out32(reg_index, reg_value | reg_bitmask);
+}
+
+void ll_vrc5477_irq_disable(int vrc5477_irq)
+{
+	u32 reg_value;
+	u32 reg_bitmask;
+	u32 reg_index;
+
+	db_assert(vrc5477_irq >= 0);
+	db_assert(vrc5477_irq < NUM_5477_IRQ);
+
+	reg_index = DDB_INTCTRL0 + vrc5477_irq/8*4;
+	reg_value = ddb_in32(reg_index);
+	reg_bitmask = 8 << (vrc5477_irq % 8 * 4);
+
+	/* we assert that the interrupt is enabled (perhaps over-zealous) */
+	db_assert( (reg_value & reg_bitmask) != 0);
+	ddb_out32(reg_index, reg_value & ~reg_bitmask);
+}
diff --git a/arch/mips/ddb5xxx/ddb5477/kgdb_io.c b/arch/mips/ddb5xxx/ddb5477/kgdb_io.c
new file mode 100644
index 000000000000..1d18d590495b
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5477/kgdb_io.c
@@ -0,0 +1,136 @@
+/*
+ * kgdb io functions for DDB5477.  We use the second serial port (upper one).
+ *
+ * Copyright (C) 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * 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.
+ *
+ */
+
+/* ======================= CONFIG ======================== */
+
+/* [jsun] we use the second serial port for kdb */
+#define         BASE                    0xbfa04240
+#define         MAX_BAUD                115200
+
+/* distance in bytes between two serial registers */
+#define         REG_OFFSET              8
+
+/*
+ * 0 - kgdb does serial init
+ * 1 - kgdb skip serial init
+ */
+static int remoteDebugInitialized = 0;
+
+/*
+ * the default baud rate *if* kgdb does serial init
+ */
+#define		BAUD_DEFAULT		UART16550_BAUD_38400
+
+/* ======================= END OF CONFIG ======================== */
+
+typedef unsigned char uint8;
+typedef unsigned int uint32;
+
+#define         UART16550_BAUD_2400             2400
+#define         UART16550_BAUD_4800             4800
+#define         UART16550_BAUD_9600             9600
+#define         UART16550_BAUD_19200            19200
+#define         UART16550_BAUD_38400            38400
+#define         UART16550_BAUD_57600            57600
+#define         UART16550_BAUD_115200           115200
+
+#define         UART16550_PARITY_NONE           0
+#define         UART16550_PARITY_ODD            0x08
+#define         UART16550_PARITY_EVEN           0x18
+#define         UART16550_PARITY_MARK           0x28
+#define         UART16550_PARITY_SPACE          0x38
+
+#define         UART16550_DATA_5BIT             0x0
+#define         UART16550_DATA_6BIT             0x1
+#define         UART16550_DATA_7BIT             0x2
+#define         UART16550_DATA_8BIT             0x3
+
+#define         UART16550_STOP_1BIT             0x0
+#define         UART16550_STOP_2BIT             0x4
+
+/* register offset */
+#define         OFS_RCV_BUFFER          0
+#define         OFS_TRANS_HOLD          0
+#define         OFS_SEND_BUFFER         0
+#define         OFS_INTR_ENABLE         (1*REG_OFFSET)
+#define         OFS_INTR_ID             (2*REG_OFFSET)
+#define         OFS_DATA_FORMAT         (3*REG_OFFSET)
+#define         OFS_LINE_CONTROL        (3*REG_OFFSET)
+#define         OFS_MODEM_CONTROL       (4*REG_OFFSET)
+#define         OFS_RS232_OUTPUT        (4*REG_OFFSET)
+#define         OFS_LINE_STATUS         (5*REG_OFFSET)
+#define         OFS_MODEM_STATUS        (6*REG_OFFSET)
+#define         OFS_RS232_INPUT         (6*REG_OFFSET)
+#define         OFS_SCRATCH_PAD         (7*REG_OFFSET)
+
+#define         OFS_DIVISOR_LSB         (0*REG_OFFSET)
+#define         OFS_DIVISOR_MSB         (1*REG_OFFSET)
+
+
+/* memory-mapped read/write of the port */
+#define         UART16550_READ(y)    (*((volatile uint8*)(BASE + y)))
+#define         UART16550_WRITE(y, z)  ((*((volatile uint8*)(BASE + y))) = z)
+
+void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
+{
+        /* disable interrupts */
+        UART16550_WRITE(OFS_INTR_ENABLE, 0);
+
+        /* set up buad rate */
+        {
+                uint32 divisor;
+
+                /* set DIAB bit */
+                UART16550_WRITE(OFS_LINE_CONTROL, 0x80);
+
+                /* set divisor */
+                divisor = MAX_BAUD / baud;
+                UART16550_WRITE(OFS_DIVISOR_LSB, divisor & 0xff);
+                UART16550_WRITE(OFS_DIVISOR_MSB, (divisor & 0xff00) >> 8);
+
+                /* clear DIAB bit */
+                UART16550_WRITE(OFS_LINE_CONTROL, 0x0);
+        }
+
+        /* set data format */
+        UART16550_WRITE(OFS_DATA_FORMAT, data | parity | stop);
+}
+
+
+uint8 getDebugChar(void)
+{
+        if (!remoteDebugInitialized) {
+                remoteDebugInitialized = 1;
+                debugInit(BAUD_DEFAULT,
+                          UART16550_DATA_8BIT,
+                          UART16550_PARITY_NONE, UART16550_STOP_1BIT);
+        }
+
+        while ((UART16550_READ(OFS_LINE_STATUS) & 0x1) == 0);
+        return UART16550_READ(OFS_RCV_BUFFER);
+}
+
+
+int putDebugChar(uint8 byte)
+{
+        if (!remoteDebugInitialized) {
+                remoteDebugInitialized = 1;
+                debugInit(BAUD_DEFAULT,
+                          UART16550_DATA_8BIT,
+                          UART16550_PARITY_NONE, UART16550_STOP_1BIT);
+        }
+
+        while ((UART16550_READ(OFS_LINE_STATUS) & 0x20) == 0);
+        UART16550_WRITE(OFS_SEND_BUFFER, byte);
+        return 1;
+}
diff --git a/arch/mips/ddb5xxx/ddb5477/lcd44780.c b/arch/mips/ddb5xxx/ddb5477/lcd44780.c
new file mode 100644
index 000000000000..35c6c22610c5
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5477/lcd44780.c
@@ -0,0 +1,92 @@
+/*
+ * lcd44780.c
+ * Simple "driver" for a memory-mapped 44780-style LCD display.
+ *
+ * Copyright 2001 Bradley D. LaRonde <brad@ltc.com>
+ *
+ * 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.
+ *
+ */
+
+#define LCD44780_COMMAND   ((volatile unsigned char *)0xbe020000)
+#define LCD44780_DATA      ((volatile unsigned char *)0xbe020001)
+
+#define LCD44780_4BIT_1LINE        0x20
+#define LCD44780_4BIT_2LINE        0x28
+#define LCD44780_8BIT_1LINE        0x30
+#define LCD44780_8BIT_2LINE        0x38
+#define LCD44780_MODE_DEC          0x04
+#define LCD44780_MODE_DEC_SHIFT    0x05
+#define LCD44780_MODE_INC          0x06
+#define LCD44780_MODE_INC_SHIFT    0x07
+#define LCD44780_SCROLL_LEFT       0x18
+#define LCD44780_SCROLL_RIGHT      0x1e
+#define LCD44780_CURSOR_UNDERLINE  0x0e
+#define LCD44780_CURSOR_BLOCK      0x0f
+#define LCD44780_CURSOR_OFF        0x0c
+#define LCD44780_CLEAR             0x01
+#define LCD44780_BLANK             0x08
+#define LCD44780_RESTORE           0x0c  // Same as CURSOR_OFF
+#define LCD44780_HOME              0x02
+#define LCD44780_LEFT              0x10
+#define LCD44780_RIGHT             0x14
+
+void lcd44780_wait(void)
+{
+	int i, j;
+	for(i=0; i < 400; i++)
+		for(j=0; j < 10000; j++);
+}
+
+void lcd44780_command(unsigned char c)
+{
+	*LCD44780_COMMAND = c;
+	lcd44780_wait();
+}
+
+void lcd44780_data(unsigned char c)
+{
+	*LCD44780_DATA = c;
+	lcd44780_wait();
+}
+
+void lcd44780_puts(const char* s)
+{
+	int i,j;
+	int pos = 0;
+
+	lcd44780_command(LCD44780_CLEAR);
+	while(*s) {
+		lcd44780_data(*s);
+		s++;
+		pos++;
+		if (pos == 8) {
+		  /* We must write 32 of spaces to get cursor to 2nd line */
+		  for (j=0; j<32; j++) {
+		    lcd44780_data(' ');
+		  }
+		}
+		if (pos == 16) {
+		  /* We have filled all 16 character positions, so stop
+		     outputing data */
+		  break;
+		}
+	}
+#ifdef LCD44780_PUTS_PAUSE
+	for(i = 1; i < 2000; i++)
+		lcd44780_wait();
+#endif
+}
+
+void lcd44780_init(void)
+{
+	// The display on the RockHopper is physically a single
+	// 16 char line (two 8 char lines concatenated).  bdl
+	lcd44780_command(LCD44780_8BIT_2LINE);
+	lcd44780_command(LCD44780_MODE_INC);
+	lcd44780_command(LCD44780_CURSOR_BLOCK);
+	lcd44780_command(LCD44780_CLEAR);
+}
diff --git a/arch/mips/ddb5xxx/ddb5477/lcd44780.h b/arch/mips/ddb5xxx/ddb5477/lcd44780.h
new file mode 100644
index 000000000000..cf2f0f71eee5
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5477/lcd44780.h
@@ -0,0 +1,15 @@
+/*
+ * lcd44780.h
+ * Simple "driver" for a memory-mapped 44780-style LCD display.
+ *
+ * Copyright 2001 Bradley D. LaRonde <brad@ltc.com>
+ *
+ * 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.
+ *
+ */
+
+void lcd44780_puts(const char* s);
+void lcd44780_init(void);
diff --git a/arch/mips/ddb5xxx/ddb5477/setup.c b/arch/mips/ddb5xxx/ddb5477/setup.c
new file mode 100644
index 000000000000..15c6e543b56f
--- /dev/null
+++ b/arch/mips/ddb5xxx/ddb5477/setup.c
@@ -0,0 +1,405 @@
+/*
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
+ *
+ * arch/mips/ddb5xxx/ddb5477/setup.c
+ *     Setup file for DDB5477.
+ *
+ * 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.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/fs.h>
+#include <linux/ioport.h>
+#include <linux/param.h>	/* for HZ */
+#include <linux/major.h>
+#include <linux/kdev_t.h>
+#include <linux/root_dev.h>
+
+#include <asm/cpu.h>
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+#include <asm/time.h>
+#include <asm/bcache.h>
+#include <asm/irq.h>
+#include <asm/reboot.h>
+#include <asm/gdb-stub.h>
+#include <asm/traps.h>
+#include <asm/debug.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+#include "lcd44780.h"
+
+
+#define	USE_CPU_COUNTER_TIMER	/* whether we use cpu counter */
+
+#define	SP_TIMER_BASE			DDB_SPT1CTRL_L
+#define	SP_TIMER_IRQ			VRC5477_IRQ_SPT1
+
+static int bus_frequency = CONFIG_DDB5477_BUS_FREQUENCY*1000;
+
+static void ddb_machine_restart(char *command)
+{
+	static void (*back_to_prom) (void) = (void (*)(void)) 0xbfc00000;
+
+	u32 t;
+
+	/* PCI cold reset */
+	ddb_pci_reset_bus();
+
+	/* CPU cold reset */
+	t = ddb_in32(DDB_CPUSTAT);
+	db_assert((t&1));
+	ddb_out32(DDB_CPUSTAT, t);
+
+	/* Call the PROM */
+	back_to_prom();
+}
+
+static void ddb_machine_halt(void)
+{
+	printk("DDB Vrc-5477 halted.\n");
+	while (1);
+}
+
+static void ddb_machine_power_off(void)
+{
+	printk("DDB Vrc-5477 halted. Please turn off the power.\n");
+	while (1);
+}
+
+extern void rtc_ds1386_init(unsigned long base);
+
+static unsigned int __init detect_bus_frequency(unsigned long rtc_base)
+{
+	unsigned int freq;
+	unsigned char c;
+	unsigned int t1, t2;
+	unsigned i;
+
+	ddb_out32(SP_TIMER_BASE, 0xffffffff);
+	ddb_out32(SP_TIMER_BASE+4, 0x1);
+	ddb_out32(SP_TIMER_BASE+8, 0xffffffff);
+
+	/* check if rtc is running */
+	c= *(volatile unsigned char*)rtc_base;
+	for(i=0; (c == *(volatile unsigned char*)rtc_base) && (i<100000000); i++);
+	if (c == *(volatile unsigned char*)rtc_base) {
+		printk("Failed to detect bus frequency.  Use default 83.3MHz.\n");
+		return 83333000;
+	}
+
+	c= *(volatile unsigned char*)rtc_base;
+	while (c == *(volatile unsigned char*)rtc_base);
+	/* we are now at the turn of 1/100th second, if no error. */
+	t1 = ddb_in32(SP_TIMER_BASE+8);
+
+	for (i=0; i< 10; i++) {
+		c= *(volatile unsigned char*)rtc_base;
+		while (c == *(volatile unsigned char*)rtc_base);
+		/* we are now at the turn of another 1/100th second */
+		t2 = ddb_in32(SP_TIMER_BASE+8);
+	}
+
+	ddb_out32(SP_TIMER_BASE+4, 0x0);	/* disable it again */
+
+	freq = (t1 - t2)*10;
+	printk("DDB bus frequency detection : %u \n", freq);
+	return freq;
+}
+
+static void __init ddb_time_init(void)
+{
+	unsigned long rtc_base;
+	unsigned int i;
+
+	/* we have ds1396 RTC chip */
+	if (mips_machtype == MACH_NEC_ROCKHOPPER
+		||  mips_machtype == MACH_NEC_ROCKHOPPERII) {
+		rtc_base = KSEG1ADDR(DDB_LCS2_BASE);
+	} else {
+		rtc_base = KSEG1ADDR(DDB_LCS1_BASE);
+	}
+	rtc_ds1386_init(rtc_base);
+
+	/* do we need to do run-time detection of bus speed? */
+	if (bus_frequency == 0) {
+		bus_frequency = detect_bus_frequency(rtc_base);
+	}
+
+	/* mips_hpt_frequency is 1/2 of the cpu core freq */
+	i =  (read_c0_config() >> 28 ) & 7;
+	if ((current_cpu_data.cputype == CPU_R5432) && (i == 3)) 
+		i = 4;
+	mips_hpt_frequency = bus_frequency*(i+4)/4;
+}
+
+extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
+
+static void __init ddb_timer_setup(struct irqaction *irq)
+{
+#if defined(USE_CPU_COUNTER_TIMER)
+
+        /* we are using the cpu counter for timer interrupts */
+	setup_irq(CPU_IRQ_BASE + 7, irq);
+
+#else
+
+	/* if we use Special purpose timer 1 */
+	ddb_out32(SP_TIMER_BASE, bus_frequency/HZ);
+	ddb_out32(SP_TIMER_BASE+4, 0x1);
+	setup_irq(SP_TIMER_IRQ, irq);
+
+#endif
+}
+
+static void ddb5477_board_init(void);
+
+extern struct pci_controller ddb5477_ext_controller;
+extern struct pci_controller ddb5477_io_controller;
+
+static int  ddb5477_setup(void)
+{
+	/* initialize board - we don't trust the loader */
+        ddb5477_board_init();
+
+	set_io_port_base(KSEG1ADDR(DDB_PCI_IO_BASE));
+
+	board_time_init = ddb_time_init;
+	board_timer_setup = ddb_timer_setup;
+
+	_machine_restart = ddb_machine_restart;
+	_machine_halt = ddb_machine_halt;
+	_machine_power_off = ddb_machine_power_off;
+
+	/* setup resource limits */
+	ioport_resource.end = DDB_PCI0_IO_SIZE + DDB_PCI1_IO_SIZE - 1;
+	iomem_resource.end = 0xffffffff;
+
+	/* Reboot on panic */
+	panic_timeout = 180;
+
+	register_pci_controller (&ddb5477_ext_controller);
+	register_pci_controller (&ddb5477_io_controller);
+
+	return 0;
+}
+
+early_initcall(ddb5477_setup);
+
+static void __init ddb5477_board_init(void)
+{
+	/* ----------- setup PDARs ------------ */
+
+	/* SDRAM should have been set */
+	db_assert(ddb_in32(DDB_SDRAM0) ==
+		    ddb_calc_pdar(DDB_SDRAM_BASE, board_ram_size, 32, 0, 1));
+
+	/* SDRAM1 should be turned off.  What is this for anyway ? */
+	db_assert( (ddb_in32(DDB_SDRAM1) & 0xf) == 0);
+
+	/* Setup local bus. */
+
+	/* Flash U12 PDAR and timing. */
+	ddb_set_pdar(DDB_LCS0, DDB_LCS0_BASE, DDB_LCS0_SIZE, 16, 0, 0);
+	ddb_out32(DDB_LCST0, 0x00090842);
+
+	/* We need to setup LCS1 and LCS2 differently based on the
+	   board_version */
+	if (mips_machtype == MACH_NEC_ROCKHOPPER) {
+		/* Flash U13 PDAR and timing. */
+		ddb_set_pdar(DDB_LCS1, DDB_LCS1_BASE, DDB_LCS1_SIZE, 16, 0, 0);
+		ddb_out32(DDB_LCST1, 0x00090842);
+
+		/* EPLD (NVRAM, switch, LCD, and mezzanie). */
+		ddb_set_pdar(DDB_LCS2, DDB_LCS2_BASE, DDB_LCS2_SIZE, 8, 0, 0);
+	} else {
+		/* misc */
+		ddb_set_pdar(DDB_LCS1, DDB_LCS1_BASE, DDB_LCS1_SIZE, 8, 0, 0);
+		/* mezzanie (?) */
+		ddb_set_pdar(DDB_LCS2, DDB_LCS2_BASE, DDB_LCS2_SIZE, 16, 0, 0);
+	}
+
+	/* verify VRC5477 base addr */
+	db_assert(ddb_in32(DDB_VRC5477) ==
+		  ddb_calc_pdar(DDB_VRC5477_BASE, DDB_VRC5477_SIZE, 32, 0, 1));
+
+	/* verify BOOT ROM addr */
+	db_assert(ddb_in32(DDB_BOOTCS) ==
+		  ddb_calc_pdar(DDB_BOOTCS_BASE, DDB_BOOTCS_SIZE, 8, 0, 0));
+
+	/* setup PCI windows - window0 for MEM/config, window1 for IO */
+	ddb_set_pdar(DDB_PCIW0, DDB_PCI0_MEM_BASE, DDB_PCI0_MEM_SIZE, 32, 0, 1);
+	ddb_set_pdar(DDB_PCIW1, DDB_PCI0_IO_BASE, DDB_PCI0_IO_SIZE, 32, 0, 1);
+	ddb_set_pdar(DDB_IOPCIW0, DDB_PCI1_MEM_BASE, DDB_PCI1_MEM_SIZE, 32, 0, 1);
+	ddb_set_pdar(DDB_IOPCIW1, DDB_PCI1_IO_BASE, DDB_PCI1_IO_SIZE, 32, 0, 1);
+
+	/* ------------ reset PCI bus and BARs ----------------- */
+	ddb_pci_reset_bus();
+
+	ddb_out32(DDB_BARM010, 0x00000008);
+	ddb_out32(DDB_BARM011, 0x00000008);
+
+	ddb_out32(DDB_BARC0, 0xffffffff);
+	ddb_out32(DDB_BARM230, 0xffffffff);
+	ddb_out32(DDB_BAR00, 0xffffffff);
+	ddb_out32(DDB_BAR10, 0xffffffff);
+	ddb_out32(DDB_BAR20, 0xffffffff);
+	ddb_out32(DDB_BAR30, 0xffffffff);
+	ddb_out32(DDB_BAR40, 0xffffffff);
+	ddb_out32(DDB_BAR50, 0xffffffff);
+	ddb_out32(DDB_BARB0, 0xffffffff);
+
+	ddb_out32(DDB_BARC1, 0xffffffff);
+	ddb_out32(DDB_BARM231, 0xffffffff);
+	ddb_out32(DDB_BAR01, 0xffffffff);
+	ddb_out32(DDB_BAR11, 0xffffffff);
+	ddb_out32(DDB_BAR21, 0xffffffff);
+	ddb_out32(DDB_BAR31, 0xffffffff);
+	ddb_out32(DDB_BAR41, 0xffffffff);
+	ddb_out32(DDB_BAR51, 0xffffffff);
+	ddb_out32(DDB_BARB1, 0xffffffff);
+
+	/*
+	 * We use pci master register 0  for memory space / config space
+	 * And we use register 1 for IO space.
+	 * Note that for memory space, we bump up the pci base address
+	 * so that we have 1:1 mapping between PCI memory and cpu physical.
+	 * For PCI IO space, it starts from 0 in PCI IO space but with
+	 * DDB_xx_IO_BASE in CPU physical address space.
+	 */
+	ddb_set_pmr(DDB_PCIINIT00, DDB_PCICMD_MEM, DDB_PCI0_MEM_BASE,
+		    DDB_PCI_ACCESS_32);
+	ddb_set_pmr(DDB_PCIINIT10, DDB_PCICMD_IO, 0, DDB_PCI_ACCESS_32);
+
+	ddb_set_pmr(DDB_PCIINIT01, DDB_PCICMD_MEM, DDB_PCI1_MEM_BASE,
+		    DDB_PCI_ACCESS_32);
+	ddb_set_pmr(DDB_PCIINIT11, DDB_PCICMD_IO, DDB_PCI0_IO_SIZE,
+                    DDB_PCI_ACCESS_32);
+
+
+	/* PCI cross window should be set properly */
+	ddb_set_pdar(DDB_BARP00, DDB_PCI1_MEM_BASE, DDB_PCI1_MEM_SIZE, 32, 0, 1);
+	ddb_set_pdar(DDB_BARP10, DDB_PCI1_IO_BASE, DDB_PCI1_IO_SIZE, 32, 0, 1);
+	ddb_set_pdar(DDB_BARP01, DDB_PCI0_MEM_BASE, DDB_PCI0_MEM_SIZE, 32, 0, 1);
+	ddb_set_pdar(DDB_BARP11, DDB_PCI0_IO_BASE, DDB_PCI0_IO_SIZE, 32, 0, 1);
+
+	if (mips_machtype == MACH_NEC_ROCKHOPPER
+	   ||  mips_machtype == MACH_NEC_ROCKHOPPERII) {
+		/* Disable bus diagnostics. */ 
+		ddb_out32(DDB_PCICTL0_L, 0);
+		ddb_out32(DDB_PCICTL0_H, 0);
+		ddb_out32(DDB_PCICTL1_L, 0);
+		ddb_out32(DDB_PCICTL1_H, 0);         
+	}
+
+	if (mips_machtype == MACH_NEC_ROCKHOPPER) {
+		u16			vid;
+		struct pci_bus		bus;
+		struct pci_dev		dev_m1533;
+		extern struct pci_ops 	ddb5477_ext_pci_ops;
+
+		bus.parent      = NULL;    /* we scan the top level only */
+		bus.ops         = &ddb5477_ext_pci_ops;
+		dev_m1533.bus         = &bus;
+		dev_m1533.sysdata     = NULL;
+		dev_m1533.devfn       = 7*8;     // slot 7: M1533 SouthBridge.
+		pci_read_config_word(&dev_m1533, 0, &vid);
+		if (vid == PCI_VENDOR_ID_AL) {
+			printk("Changing mips_machtype to MACH_NEC_ROCKHOPPERII\n");
+			mips_machtype = MACH_NEC_ROCKHOPPERII;
+		}
+	}
+
+	/* enable USB input buffers */
+	ddb_out32(DDB_PIBMISC, 0x00000007);
+
+	/* For dual-function pins, make them all non-GPIO */
+	ddb_out32(DDB_GIUFUNSEL, 0x0);
+	// ddb_out32(DDB_GIUFUNSEL, 0xfe0fcfff);  /* NEC recommanded value */
+
+	if (mips_machtype == MACH_NEC_ROCKHOPPERII) {
+
+		/* enable IDE controller on Ali chip (south bridge) */
+		u8			temp8;
+		struct pci_bus		bus;
+		struct pci_dev		dev_m1533;
+		struct pci_dev		dev_m5229;
+		extern struct pci_ops 	ddb5477_ext_pci_ops;
+
+		/* Setup M1535 registers */
+		bus.parent      = NULL;    /* we scan the top level only */
+		bus.ops         = &ddb5477_ext_pci_ops;
+		dev_m1533.bus         = &bus;
+		dev_m1533.sysdata     = NULL;
+		dev_m1533.devfn       = 7*8;     // slot 7: M1533 SouthBridge.
+
+		/* setup IDE controller
+		 * enable IDE controller (bit 6 - 1)
+		 * IDE IDSEL to be addr:A15 (bit 4:5 - 11)
+		 * disable IDE ATA Secondary Bus Signal Pad Control (bit 3 - 0)
+		 * enable IDE ATA Primary Bus Signal Pad Control (bit 2 - 1)
+		 */
+		pci_write_config_byte(&dev_m1533, 0x58, 0x74);
+
+		/* 
+		 * positive decode (bit6 -0)
+		 * enable IDE controler interrupt (bit 4 -1)
+		 * setup SIRQ to point to IRQ 14 (bit 3:0 - 1101)
+		 */
+		pci_write_config_byte(&dev_m1533, 0x44, 0x1d);
+
+		/* Setup M5229 registers */
+		dev_m5229.bus = &bus;
+		dev_m5229.sysdata = NULL;
+		dev_m5229.devfn = 4*8;  	// slot 4 (AD15): M5229 IDE 
+
+		/*
+		 * enable IDE in the M5229 config register 0x50 (bit 0 - 1)
+		 * M5229 IDSEL is addr:15; see above setting 
+		 */
+		pci_read_config_byte(&dev_m5229, 0x50, &temp8);
+		pci_write_config_byte(&dev_m5229, 0x50, temp8 | 0x1);
+
+		/* 
+		 * enable bus master (bit 2)  and IO decoding  (bit 0) 
+		 */
+		pci_read_config_byte(&dev_m5229, 0x04, &temp8);
+		pci_write_config_byte(&dev_m5229, 0x04, temp8 | 0x5);
+
+		/*
+		 * enable native, copied from arch/ppc/k2boot/head.S
+		 * TODO - need volatile, need to be portable 
+		 */
+		pci_write_config_byte(&dev_m5229, 0x09, 0xef);
+
+		/* Set Primary Channel Command Block Timing */ 
+		pci_write_config_byte(&dev_m5229, 0x59, 0x31);
+
+		/* 
+		 * Enable primary channel 40-pin cable
+		 * M5229 register 0x4a (bit 0)
+		 */
+		pci_read_config_byte(&dev_m5229, 0x4a, &temp8);
+		pci_write_config_byte(&dev_m5229, 0x4a, temp8 | 0x1);
+	}
+
+	if (mips_machtype == MACH_NEC_ROCKHOPPER
+	   ||  mips_machtype == MACH_NEC_ROCKHOPPERII) {
+		printk("lcd44780: initializing\n");
+		lcd44780_init();
+		lcd44780_puts("MontaVista Linux");
+	}
+}