Linux-2.6.12-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!

10 files changed, 1344 insertions, 0 deletions

diff --git a/arch/mips/momentum/ocelot_c/Makefile b/arch/mips/momentum/ocelot_c/Makefile
new file mode 100644
index 0000000..9124077
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for Momentum Computer's Ocelot-C and -CS boards.
+#
+
+obj-y	 		+= cpci-irq.o int-handler.o irq.o prom.o reset.o \
+			   setup.o uart-irq.o
+
+obj-$(CONFIG_KGDB)	+= dbg_io.o
diff --git a/arch/mips/momentum/ocelot_c/cpci-irq.c b/arch/mips/momentum/ocelot_c/cpci-irq.c
new file mode 100644
index 0000000..dea48b3
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/cpci-irq.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright 2002 Momentum Computer
+ * Author: mdharm@momenco.com
+ *
+ * arch/mips/momentum/ocelot_c/cpci-irq.c
+ *     Interrupt routines for cpci.  Interrupt numbers are assigned from
+ *     CPCI_IRQ_BASE to CPCI_IRQ_BASE+8 (8 interrupt sources).
+ *
+ * Note that the high-level software will need to be careful about using
+ * these interrupts.  If this board is asserting a cPCI interrupt, it will
+ * also see the asserted interrupt.  Care must be taken to avoid an
+ * interrupt flood.
+ *
+ * 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/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <asm/ptrace.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <asm/io.h>
+#include "ocelot_c_fpga.h"
+
+#define CPCI_IRQ_BASE	8
+
+static inline int ls1bit8(unsigned int x)
+{
+        int b = 7, s;
+
+        s =  4; if (((unsigned char)(x <<  4)) == 0) s = 0; b -= s; x <<= s;
+        s =  2; if (((unsigned char)(x <<  2)) == 0) s = 0; b -= s; x <<= s;
+        s =  1; if (((unsigned char)(x <<  1)) == 0) s = 0; b -= s;
+
+        return b;
+}
+
+/* mask off an interrupt -- 0 is enable, 1 is disable */
+static inline void mask_cpci_irq(unsigned int irq)
+{
+	uint32_t value;
+
+	value = OCELOT_FPGA_READ(INTMASK);
+	value |= 1 << (irq - CPCI_IRQ_BASE);
+	OCELOT_FPGA_WRITE(value, INTMASK);
+
+	/* read the value back to assure that it's really been written */
+	value = OCELOT_FPGA_READ(INTMASK);
+}
+
+/* unmask an interrupt -- 0 is enable, 1 is disable */
+static inline void unmask_cpci_irq(unsigned int irq)
+{
+	uint32_t value;
+
+	value = OCELOT_FPGA_READ(INTMASK);
+	value &= ~(1 << (irq - CPCI_IRQ_BASE));
+	OCELOT_FPGA_WRITE(value, INTMASK);
+
+	/* read the value back to assure that it's really been written */
+	value = OCELOT_FPGA_READ(INTMASK);
+}
+
+/*
+ * Enables the IRQ in the FPGA
+ */
+static void enable_cpci_irq(unsigned int irq)
+{
+	unmask_cpci_irq(irq);
+}
+
+/*
+ * Initialize the IRQ in the FPGA
+ */
+static unsigned int startup_cpci_irq(unsigned int irq)
+{
+	unmask_cpci_irq(irq);
+	return 0;
+}
+
+/*
+ * Disables the IRQ in the FPGA
+ */
+static void disable_cpci_irq(unsigned int irq)
+{
+	mask_cpci_irq(irq);
+}
+
+/*
+ * Masks and ACKs an IRQ
+ */
+static void mask_and_ack_cpci_irq(unsigned int irq)
+{
+	mask_cpci_irq(irq);
+}
+
+/*
+ * End IRQ processing
+ */
+static void end_cpci_irq(unsigned int irq)
+{
+	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+		unmask_cpci_irq(irq);
+}
+
+/*
+ * Interrupt handler for interrupts coming from the FPGA chip.
+ * It could be built in ethernet ports etc...
+ */
+void ll_cpci_irq(struct pt_regs *regs)
+{
+	unsigned int irq_src, irq_mask;
+
+	/* read the interrupt status registers */
+	irq_src = OCELOT_FPGA_READ(INTSTAT);
+	irq_mask = OCELOT_FPGA_READ(INTMASK);
+
+	/* mask for just the interrupts we want */
+	irq_src &= ~irq_mask;
+
+	do_IRQ(ls1bit8(irq_src) + CPCI_IRQ_BASE, regs);
+}
+
+#define shutdown_cpci_irq	disable_cpci_irq
+
+struct hw_interrupt_type cpci_irq_type = {
+	"CPCI/FPGA",
+	startup_cpci_irq,
+	shutdown_cpci_irq,
+	enable_cpci_irq,
+	disable_cpci_irq,
+	mask_and_ack_cpci_irq,
+	end_cpci_irq,
+	NULL
+};
+
+void cpci_irq_init(void)
+{
+	int i;
+
+	/* Reset irq handlers pointers to NULL */
+	for (i = CPCI_IRQ_BASE; i < (CPCI_IRQ_BASE + 8); i++) {
+		irq_desc[i].status = IRQ_DISABLED;
+		irq_desc[i].action = 0;
+		irq_desc[i].depth = 2;
+		irq_desc[i].handler = &cpci_irq_type;
+	}
+}
diff --git a/arch/mips/momentum/ocelot_c/dbg_io.c b/arch/mips/momentum/ocelot_c/dbg_io.c
new file mode 100644
index 0000000..8720bcc
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/dbg_io.c
@@ -0,0 +1,126 @@
+#include <linux/config.h>
+
+#ifdef CONFIG_KGDB
+
+#include <asm/serial.h> /* For the serial port location and base baud */
+
+/* --- CONFIG --- */
+
+typedef unsigned char uint8;
+typedef unsigned int uint32;
+
+/* --- END OF CONFIG --- */
+
+#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
+
+/* ----------------------------------------------------- */
+
+/* === CONFIG === */
+
+/* [jsun] we use the second serial port for kdb */
+#define         BASE                    OCELOT_SERIAL1_BASE
+#define         MAX_BAUD                OCELOT_BASE_BAUD
+
+/* === END OF CONFIG === */
+
+#define         REG_OFFSET              4
+
+/* 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);
+}
+
+static int remoteDebugInitialized = 0;
+
+uint8 getDebugChar(void)
+{
+	if (!remoteDebugInitialized) {
+		remoteDebugInitialized = 1;
+		debugInit(UART16550_BAUD_38400,
+			  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(UART16550_BAUD_38400,
+			  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;
+}
+
+#endif
diff --git a/arch/mips/momentum/ocelot_c/int-handler.S b/arch/mips/momentum/ocelot_c/int-handler.S
new file mode 100644
index 0000000..2f24306
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/int-handler.S
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2002 Momentum Computer Inc.
+ * Author: Matthew Dharm <mdharm@momenco.com>
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * First-level interrupt dispatcher for Ocelot-CS board.
+ *
+ * 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 "ocelot_c_fpga.h"
+
+/*
+ * First level interrupt dispatcher for Ocelot-CS board
+ */
+		.align	5
+		NESTED(ocelot_handle_int, PT_SIZE, sp)
+		SAVE_ALL
+		CLI
+		.set	at
+		mfc0	t0, CP0_CAUSE  
+		mfc0	t2, CP0_STATUS
+
+		and	t0, t2
+        
+		andi	t1, t0, STATUSF_IP0	/* sw0 software interrupt */
+		bnez	t1, ll_sw0_irq
+		andi	t1, t0, STATUSF_IP1	/* sw1 software interrupt */
+		bnez	t1, ll_sw1_irq
+		andi	t1, t0, STATUSF_IP2	/* int0 hardware line */
+		bnez	t1, ll_scsi_irq
+		andi	t1, t0, STATUSF_IP3	/* int1 hardware line */
+		bnez	t1, ll_uart_decode_irq
+		andi	t1, t0, STATUSF_IP4	/* int2 hardware line */
+		bnez	t1, ll_pmc_irq
+		andi	t1, t0, STATUSF_IP5	/* int3 hardware line */
+		bnez	t1, ll_cpci_decode_irq
+		andi	t1, t0, STATUSF_IP6	/* int4 hardware line */
+		bnez	t1, ll_mv64340_decode_irq
+		andi	t1, t0, STATUSF_IP7	/* cpu timer */
+		bnez	t1, ll_cputimer_irq
+
+		.set	reorder
+
+		/* wrong alarm or masked ... */
+		j	spurious_interrupt
+		nop
+		END(ocelot_handle_int)
+
+		.align	5
+ll_sw0_irq:
+		li	a0, 0
+		move	a1, sp
+		jal	do_IRQ
+		j	ret_from_irq
+ll_sw1_irq:
+		li	a0, 1
+		move	a1, sp
+		jal	do_IRQ
+		j	ret_from_irq
+ll_scsi_irq:
+		li	a0, 2
+		move	a1, sp
+		jal	do_IRQ
+		j	ret_from_irq
+
+ll_uart_decode_irq:
+		move	a0, sp
+		jal	ll_uart_irq
+		j	ret_from_irq
+
+ll_pmc_irq:
+		li	a0, 4
+		move	a1, sp
+		jal	do_IRQ
+		j	ret_from_irq
+	
+ll_cpci_decode_irq:
+		move	a0, sp
+		jal	ll_cpci_irq
+		j	ret_from_irq
+
+ll_mv64340_decode_irq:
+		move	a0, sp
+		jal	ll_mv64340_irq
+		j	ret_from_irq
+
+ll_cputimer_irq:
+		li	a0, 7
+		move	a1, sp
+		jal	do_IRQ
+		j	ret_from_irq
+	
diff --git a/arch/mips/momentum/ocelot_c/irq.c b/arch/mips/momentum/ocelot_c/irq.c
new file mode 100644
index 0000000..300fe8e
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/irq.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2000 RidgeRun, Inc.
+ * Author: RidgeRun, Inc.
+ *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ * Copyright (C) 2000, 01, 05 Ralf Baechle (ralf@linux-mips.org)
+ *
+ *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel_stat.h>
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/timex.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/bitops.h>
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+#include <asm/mv64340.h>
+#include <asm/system.h>
+
+extern asmlinkage void ocelot_handle_int(void);
+extern void uart_irq_init(void);
+extern void cpci_irq_init(void);
+
+static struct irqaction cascade_fpga = {
+	no_action, SA_INTERRUPT, CPU_MASK_NONE, "cascade via FPGA", NULL, NULL
+};
+
+static struct irqaction cascade_mv64340 = {
+	no_action, SA_INTERRUPT, CPU_MASK_NONE, "cascade via MV64340", NULL, NULL
+};
+
+void __init arch_init_irq(void)
+{
+	/*
+	 * Clear all of the interrupts while we change the able around a bit.
+	 * int-handler is not on bootstrap
+	 */
+	clear_c0_status(ST0_IM);
+
+	/* Sets the first-level interrupt dispatcher. */
+	set_except_vector(0, ocelot_handle_int);
+	mips_cpu_irq_init(0);
+
+	/* set up the cascading interrupts */
+	setup_irq(3, &cascade_fpga);
+	setup_irq(5, &cascade_fpga);
+	setup_irq(6, &cascade_mv64340);
+
+	mv64340_irq_init(16);
+	uart_irq_init();
+	cpci_irq_init();
+}
diff --git a/arch/mips/momentum/ocelot_c/ocelot_c_fpga.h b/arch/mips/momentum/ocelot_c/ocelot_c_fpga.h
new file mode 100644
index 0000000..a6cf7a7
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/ocelot_c_fpga.h
@@ -0,0 +1,60 @@
+/*
+ * Ocelot-C Board Register Definitions
+ *
+ * (C) 2002 Momentum Computer Inc.
+ *
+ *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  Louis Hamilton, Red Hat, Inc.
+ *    hamilton@redhat.com  [MIPS64 modifications]
+ */
+
+#ifndef __OCELOT_C_FPGA_H__
+#define __OCELOT_C_FPGA_H__
+
+#include <linux/config.h>
+
+#ifdef CONFIG_MIPS64
+#define OCELOT_C_CS0_ADDR       (0xfffffffffc000000)
+#else
+#define OCELOT_C_CS0_ADDR               (0xfc000000)
+#endif
+
+#define OCELOT_C_REG_BOARDREV		0x0
+#define OCELOT_C_REG_FPGA_REV		0x1
+#define OCELOT_C_REG_FPGA_TYPE		0x2
+#define OCELOT_C_REG_RESET_STATUS	0x3
+#define OCELOT_C_REG_BOARD_STATUS	0x4
+#define OCELOT_C_REG_CPCI_ID		0x5
+#define OCELOT_C_REG_SET		0x6
+#define OCELOT_C_REG_CLR		0x7
+#define OCELOT_C_REG_EEPROM_MODE	0x9
+#define OCELOT_C_REG_INTMASK		0xa
+#define OCELOT_C_REG_INTSTAT		0xb
+#define OCELOT_C_REG_UART_INTMASK	0xc
+#define OCELOT_C_REG_UART_INTSTAT	0xd
+#define OCELOT_C_REG_INTSET		0xe
+#define OCELOT_C_REG_INTCLR		0xf
+
+#define OCELOT_FPGA_WRITE(x, y) writeb(x, OCELOT_C_CS0_ADDR + OCELOT_C_REG_##y)
+#define OCELOT_FPGA_READ(x) readb(OCELOT_C_CS0_ADDR + OCELOT_C_REG_##x)
+
+#endif
diff --git a/arch/mips/momentum/ocelot_c/prom.c b/arch/mips/momentum/ocelot_c/prom.c
new file mode 100644
index 0000000..49ac302
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/prom.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright 2002 Momentum Computer Inc.
+ * Author: Matthew Dharm <mdharm@momenco.com>
+ *
+ * Louis Hamilton, Red Hat, Inc.
+ *   hamilton@redhat.com  [MIPS64 modifications]
+ *
+ * Based on Ocelot Linux port, which is
+ * 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/mv64340.h>
+#include <asm/pmon.h>
+
+#include "ocelot_c_fpga.h"
+
+struct callvectors* debug_vectors;
+
+extern unsigned long marvell_base;
+extern unsigned long cpu_clock;
+
+#ifdef CONFIG_MV643XX_ETH
+extern unsigned char prom_mac_addr_base[6];
+#endif
+
+const char *get_system_type(void)
+{
+#ifdef CONFIG_CPU_SR71000
+	return "Momentum Ocelot-CS";
+#else
+	return "Momentum Ocelot-C";
+#endif
+}
+
+#ifdef CONFIG_MV643XX_ETH
+static void burn_clocks(void)
+{
+	int i;
+
+	/* this loop should burn at least 1us -- this should be plenty */
+	for (i = 0; i < 0x10000; i++)
+		;
+}
+
+static u8 exchange_bit(u8 val, u8 cs)
+{
+	/* place the data */
+	OCELOT_FPGA_WRITE((val << 2) | cs, EEPROM_MODE);
+	burn_clocks();
+
+	/* turn the clock on */
+	OCELOT_FPGA_WRITE((val << 2) | cs | 0x2, EEPROM_MODE);
+	burn_clocks();
+
+	/* turn the clock off and read-strobe */
+	OCELOT_FPGA_WRITE((val << 2) | cs | 0x10, EEPROM_MODE);
+	
+	/* return the data */
+	return ((OCELOT_FPGA_READ(EEPROM_MODE) >> 3) & 0x1);
+}
+
+void get_mac(char dest[6])
+{
+	u8 read_opcode[12] = {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+	int i,j;
+
+	for (i = 0; i < 12; i++)
+		exchange_bit(read_opcode[i], 1);
+
+	for (j = 0; j < 6; j++) {
+		dest[j] = 0;
+		for (i = 0; i < 8; i++) {
+			dest[j] <<= 1;
+			dest[j] |= exchange_bit(0, 1);
+		}
+	}
+
+	/* turn off CS */
+	exchange_bit(0,0);
+}
+#endif
+
+
+#ifdef CONFIG_MIPS64
+
+unsigned long signext(unsigned long addr)
+{
+  addr &= 0xffffffff;
+  return (unsigned long)((int)addr);
+}
+
+void *get_arg(unsigned long args, int arc)
+{
+  unsigned long ul;
+  unsigned char *puc, uc;
+
+  args += (arc * 4);
+  ul = (unsigned long)signext(args);
+  puc = (unsigned char *)ul;
+  if (puc == 0)
+    return (void *)0;
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+  uc = *puc++;
+  ul = (unsigned long)uc;
+  uc = *puc++;
+  ul |= (((unsigned long)uc) << 8);
+  uc = *puc++;
+  ul |= (((unsigned long)uc) << 16);
+  uc = *puc++;
+  ul |= (((unsigned long)uc) << 24);
+#else  /* CONFIG_CPU_LITTLE_ENDIAN */
+  uc = *puc++;
+  ul = ((unsigned long)uc) << 24;
+  uc = *puc++;
+  ul |= (((unsigned long)uc) << 16);
+  uc = *puc++;
+  ul |= (((unsigned long)uc) << 8);
+  uc = *puc++;
+  ul |= ((unsigned long)uc);
+#endif  /* CONFIG_CPU_LITTLE_ENDIAN */
+  ul = signext(ul);
+  return (void *)ul;
+}
+
+char *arg64(unsigned long addrin, int arg_index)
+{
+  unsigned long args;
+  char *p;
+  args = signext(addrin);
+  p = (char *)get_arg(args, arg_index);
+  return p;
+}
+#endif  /* CONFIG_MIPS64 */
+
+
+void __init prom_init(void)
+{
+	int argc = fw_arg0;
+	char **arg = (char **) fw_arg1;
+	char **env = (char **) fw_arg2;
+	struct callvectors *cv = (struct callvectors *) fw_arg3;
+	int i;
+
+#ifdef CONFIG_MIPS64
+	char *ptr;
+
+	printk("prom_init - MIPS64\n");
+	/* save the PROM vectors for debugging use */
+	debug_vectors = (struct callvectors *)signext((unsigned long)cv);
+
+	/* arg[0] is "g", the rest is boot parameters */
+	arcs_cmdline[0] = '\0';
+
+	for (i = 1; i < argc; i++) {
+		ptr = (char *)arg64((unsigned long)arg, i);
+		if ((strlen(arcs_cmdline) + strlen(ptr) + 1) >=
+		    sizeof(arcs_cmdline))
+			break;
+		strcat(arcs_cmdline, ptr);
+		strcat(arcs_cmdline, " ");
+	}
+	i = 0;
+	while (1) {
+		ptr = (char *)arg64((unsigned long)env, i);
+		if (! ptr)
+			break;
+
+		if (strncmp("gtbase", ptr, strlen("gtbase")) == 0) {
+			marvell_base = simple_strtol(ptr + strlen("gtbase="),
+							NULL, 16);
+
+			if ((marvell_base & 0xffffffff00000000) == 0)
+				marvell_base |= 0xffffffff00000000;
+
+			printk("marvell_base set to 0x%016lx\n", marvell_base);
+		}
+		if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) {
+			cpu_clock = simple_strtol(ptr + strlen("cpuclock="),
+							NULL, 10);
+			printk("cpu_clock set to %d\n", cpu_clock);
+		}
+		i++;
+	}
+	printk("arcs_cmdline: %s\n", arcs_cmdline);
+
+#else   /* CONFIG_MIPS64 */
+	/* save the PROM vectors for debugging use */
+	debug_vectors = cv;
+
+	/* arg[0] is "g", the rest is boot parameters */
+	arcs_cmdline[0] = '\0';
+	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, " ");
+	}
+
+	while (*env) {
+		if (strncmp("gtbase", *env, strlen("gtbase")) == 0) {
+			marvell_base = simple_strtol(*env + strlen("gtbase="),
+							NULL, 16);
+		}
+		if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) {
+			cpu_clock = simple_strtol(*env + strlen("cpuclock="),
+							NULL, 10);
+		}
+		env++;
+	}
+#endif /* CONFIG_MIPS64 */
+
+	mips_machgroup = MACH_GROUP_MOMENCO;
+	mips_machtype = MACH_MOMENCO_OCELOT_C;
+
+#ifdef CONFIG_MV643XX_ETH
+	/* get the base MAC address for on-board ethernet ports */
+	get_mac(prom_mac_addr_base);
+#endif
+
+#ifndef CONFIG_MIPS64
+	debug_vectors->printf("Booting Linux kernel...\n");
+#endif
+}
+
+unsigned long __init prom_free_prom_memory(void)
+{
+	return 0;
+}
diff --git a/arch/mips/momentum/ocelot_c/reset.c b/arch/mips/momentum/ocelot_c/reset.c
new file mode 100644
index 0000000..1f2b426
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/reset.c
@@ -0,0 +1,59 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1997, 2001 Ralf Baechle
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright (C) 2002 Momentum Computer Inc.
+ * Author: Matthew Dharm <mdharm@momenco.com>
+ *
+ * Louis Hamilton, Red Hat, Inc.
+ * hamilton@redhat.com  [MIPS64 modifications]
+ */
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/reboot.h>
+#include <asm/system.h>
+#include <linux/delay.h>
+
+void momenco_ocelot_restart(char *command)
+{
+	/* base address of timekeeper portion of part */
+	void *nvram = (void *)
+#ifdef CONFIG_MIPS64
+		0xfffffffffc807000;
+#else
+		0xfc807000;
+#endif
+
+ 	/* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */
+	writeb(0x84, nvram + 0xff7);
+
+	/* wait for the watchdog to go off */
+	mdelay(100+(1000/16));
+
+	/* if the watchdog fails for some reason, let people know */
+	printk(KERN_NOTICE "Watchdog reset failed\n");
+}
+
+void momenco_ocelot_halt(void)
+{
+	printk(KERN_NOTICE "\n** You can safely turn off the power\n");
+	while (1)
+		__asm__(".set\tmips3\n\t"
+	                "wait\n\t"
+			".set\tmips0");
+}
+
+void momenco_ocelot_power_off(void)
+{
+	momenco_ocelot_halt();
+}
diff --git a/arch/mips/momentum/ocelot_c/setup.c b/arch/mips/momentum/ocelot_c/setup.c
new file mode 100644
index 0000000..021c00e
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/setup.c
@@ -0,0 +1,363 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ * Momentum Computer Ocelot-C and -CS board dependent boot routines
+ *
+ * Copyright (C) 1996, 1997, 2001  Ralf Baechle
+ * Copyright (C) 2000 RidgeRun, Inc.
+ * Copyright (C) 2001 Red Hat, Inc.
+ * Copyright (C) 2002 Momentum Computer
+ *
+ * Author: Matthew Dharm, Momentum Computer
+ *   mdharm@momenco.com
+ *
+ * Louis Hamilton, Red Hat, Inc.
+ *   hamilton@redhat.com  [MIPS64 modifications]
+ *
+ * Author: RidgeRun, Inc.
+ *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
+ *
+ * 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.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+#include <linux/config.h>
+#include <linux/bcd.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/timex.h>
+#include <linux/vmalloc.h>
+#include <asm/time.h>
+#include <asm/bootinfo.h>
+#include <asm/page.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/pci.h>
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+#include <asm/reboot.h>
+#include <linux/bootmem.h>
+#include <linux/blkdev.h>
+#include <asm/mv64340.h>
+#include "ocelot_c_fpga.h"
+
+unsigned long marvell_base;
+extern unsigned long mv64340_sram_base;
+unsigned long cpu_clock;
+
+/* These functions are used for rebooting or halting the machine*/
+extern void momenco_ocelot_restart(char *command);
+extern void momenco_ocelot_halt(void);
+extern void momenco_ocelot_power_off(void);
+
+void momenco_time_init(void);
+
+static char reset_reason;
+
+void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, unsigned long entryhi, unsigned long pagemask);
+
+static unsigned long ENTRYLO(unsigned long paddr)
+{
+	return ((paddr & PAGE_MASK) |
+	       (_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL |
+		_CACHE_UNCACHED)) >> 6;
+}
+
+/* setup code for a handoff from a version 2 PMON 2000 PROM */
+void PMON_v2_setup(void)
+{
+	/* Some wired TLB entries for the MV64340 and perhiperals. The
+	   MV64340 is going to be hit on every IRQ anyway - there's
+	   absolutely no point in letting it be a random TLB entry, as
+	   it'll just cause needless churning of the TLB. And we use
+	   the other half for the serial port, which is just a PITA
+	   otherwise :)
+
+		Device			Physical	Virtual
+		MV64340 Internal Regs	0xf4000000	0xf4000000
+		Ocelot-C[S] PLD (CS0)	0xfc000000	0xfc000000
+		NVRAM (CS1)		0xfc800000	0xfc800000
+		UARTs (CS2)		0xfd000000	0xfd000000
+		Internal SRAM		0xfe000000	0xfe000000
+		M-Systems DOC (CS3)	0xff000000	0xff000000
+	*/
+  printk("PMON_v2_setup\n");
+
+#ifdef CONFIG_MIPS64
+	/* marvell and extra space */
+	add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xfffffffff4000000, PM_64K);
+	/* fpga, rtc, and uart */
+	add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfffffffffc000000, PM_16M);
+	/* m-sys and internal SRAM */
+	add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfffffffffe000000, PM_16M);
+
+	marvell_base = 0xfffffffff4000000;
+	mv64340_sram_base = 0xfffffffffe000000;
+#else
+	/* marvell and extra space */
+	add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xf4000000, PM_64K);
+	/* fpga, rtc, and uart */
+	add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfc000000, PM_16M);
+	/* m-sys and internal SRAM */
+	add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfe000000, PM_16M);
+
+	marvell_base = 0xf4000000;
+	mv64340_sram_base = 0xfe000000;
+#endif
+}
+
+unsigned long m48t37y_get_time(void)
+{
+#ifdef CONFIG_MIPS64
+	unsigned char *rtc_base = (unsigned char*)0xfffffffffc800000;
+#else
+	unsigned char* rtc_base = (unsigned char*)0xfc800000;
+#endif
+	unsigned int year, month, day, hour, min, sec;
+
+	/* stop the update */
+	rtc_base[0x7ff8] = 0x40;
+
+	year = BCD2BIN(rtc_base[0x7fff]);
+	year += BCD2BIN(rtc_base[0x7ff1]) * 100;
+
+	month = BCD2BIN(rtc_base[0x7ffe]);
+
+	day = BCD2BIN(rtc_base[0x7ffd]);
+
+	hour = BCD2BIN(rtc_base[0x7ffb]);
+	min = BCD2BIN(rtc_base[0x7ffa]);
+	sec = BCD2BIN(rtc_base[0x7ff9]);
+
+	/* start the update */
+	rtc_base[0x7ff8] = 0x00;
+
+	return mktime(year, month, day, hour, min, sec);
+}
+
+int m48t37y_set_time(unsigned long sec)
+{
+#ifdef CONFIG_MIPS64
+	unsigned char* rtc_base = (unsigned char*)0xfffffffffc800000;
+#else
+	unsigned char* rtc_base = (unsigned char*)0xfc800000;
+#endif
+	struct rtc_time tm;
+
+	/* convert to a more useful format -- note months count from 0 */
+	to_tm(sec, &tm);
+	tm.tm_mon += 1;
+
+	/* enable writing */
+	rtc_base[0x7ff8] = 0x80;
+
+	/* year */
+	rtc_base[0x7fff] = BIN2BCD(tm.tm_year % 100);
+	rtc_base[0x7ff1] = BIN2BCD(tm.tm_year / 100);
+
+	/* month */
+	rtc_base[0x7ffe] = BIN2BCD(tm.tm_mon);
+
+	/* day */
+	rtc_base[0x7ffd] = BIN2BCD(tm.tm_mday);
+
+	/* hour/min/sec */
+	rtc_base[0x7ffb] = BIN2BCD(tm.tm_hour);
+	rtc_base[0x7ffa] = BIN2BCD(tm.tm_min);
+	rtc_base[0x7ff9] = BIN2BCD(tm.tm_sec);
+
+	/* day of week -- not really used, but let's keep it up-to-date */
+	rtc_base[0x7ffc] = BIN2BCD(tm.tm_wday + 1);
+
+	/* disable writing */
+	rtc_base[0x7ff8] = 0x00;
+
+	return 0;
+}
+
+void momenco_timer_setup(struct irqaction *irq)
+{
+	setup_irq(7, irq);
+}
+
+void momenco_time_init(void)
+{
+#ifdef CONFIG_CPU_SR71000
+	mips_hpt_frequency = cpu_clock;
+#elif defined(CONFIG_CPU_RM7000)
+	mips_hpt_frequency = cpu_clock / 2;
+#else
+#error Unknown CPU for this board
+#endif
+	printk("momenco_time_init cpu_clock=%d\n", cpu_clock);
+	board_timer_setup = momenco_timer_setup;
+
+	rtc_get_time = m48t37y_get_time;
+	rtc_set_time = m48t37y_set_time;
+}
+
+static void __init momenco_ocelot_c_setup(void)
+{
+	unsigned int tmpword;
+
+	board_time_init = momenco_time_init;
+
+	_machine_restart = momenco_ocelot_restart;
+	_machine_halt = momenco_ocelot_halt;
+	_machine_power_off = momenco_ocelot_power_off;
+
+	/*
+	 * initrd_start = (ulong)ocelot_initrd_start;
+	 * initrd_end = (ulong)ocelot_initrd_start + (ulong)ocelot_initrd_size;
+	 * initrd_below_start_ok = 1;
+	 */
+
+	/* do handoff reconfiguration */
+	PMON_v2_setup();
+
+	/* shut down ethernet ports, just to be sure our memory doesn't get
+	 * corrupted by random ethernet traffic.
+	 */
+	MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0), 0xff << 8);
+	MV_WRITE(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1), 0xff << 8);
+	MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0), 0xff << 8);
+	MV_WRITE(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1), 0xff << 8);
+	do {}
+	  while (MV_READ(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(0)) & 0xff);
+	do {}
+	  while (MV_READ(MV64340_ETH_RECEIVE_QUEUE_COMMAND_REG(1)) & 0xff);
+	do {}
+	  while (MV_READ(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(0)) & 0xff);
+	do {}
+	  while (MV_READ(MV64340_ETH_TRANSMIT_QUEUE_COMMAND_REG(1)) & 0xff);
+	MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0),
+	         MV_READ(MV64340_ETH_PORT_SERIAL_CONTROL_REG(0)) & ~1);
+	MV_WRITE(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1),
+	         MV_READ(MV64340_ETH_PORT_SERIAL_CONTROL_REG(1)) & ~1);
+
+	/* Turn off the Bit-Error LED */
+	OCELOT_FPGA_WRITE(0x80, CLR);
+
+	tmpword = OCELOT_FPGA_READ(BOARDREV);
+#ifdef CONFIG_CPU_SR71000
+	if (tmpword < 26)
+		printk("Momenco Ocelot-CS: Board Assembly Rev. %c\n",
+			'A'+tmpword);
+	else
+		printk("Momenco Ocelot-CS: Board Assembly Revision #0x%x\n",
+			tmpword);
+#else
+	if (tmpword < 26)
+		printk("Momenco Ocelot-C: Board Assembly Rev. %c\n",
+			'A'+tmpword);
+	else
+		printk("Momenco Ocelot-C: Board Assembly Revision #0x%x\n",
+			tmpword);
+#endif
+
+	tmpword = OCELOT_FPGA_READ(FPGA_REV);
+	printk("FPGA Rev: %d.%d\n", tmpword>>4, tmpword&15);
+	tmpword = OCELOT_FPGA_READ(RESET_STATUS);
+	printk("Reset reason: 0x%x\n", tmpword);
+	switch (tmpword) {
+		case 0x1:
+			printk("  - Power-up reset\n");
+			break;
+		case 0x2:
+			printk("  - Push-button reset\n");
+			break;
+		case 0x4:
+			printk("  - cPCI bus reset\n");
+			break;
+		case 0x8:
+			printk("  - Watchdog reset\n");
+			break;
+		case 0x10:
+			printk("  - Software reset\n");
+			break;
+		default:
+			printk("  - Unknown reset cause\n");
+	}
+	reset_reason = tmpword;
+	OCELOT_FPGA_WRITE(0xff, RESET_STATUS);
+
+	tmpword = OCELOT_FPGA_READ(CPCI_ID);
+	printk("cPCI ID register: 0x%02x\n", tmpword);
+	printk("  - Slot number: %d\n", tmpword & 0x1f);
+	printk("  - PCI bus present: %s\n", tmpword & 0x40 ? "yes" : "no");
+	printk("  - System Slot: %s\n", tmpword & 0x20 ? "yes" : "no");
+
+	tmpword = OCELOT_FPGA_READ(BOARD_STATUS);
+	printk("Board Status register: 0x%02x\n", tmpword);
+	printk("  - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent");
+	printk("  - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent");
+	printk("  - L3 Cache size: %d MiB\n", (1<<((tmpword&12) >> 2))&~1);
+	printk("  - SDRAM size: %d MiB\n", 1<<(6+(tmpword&3)));
+
+	switch(tmpword &3) {
+	case 3:
+		/* 512MiB */
+		add_memory_region(0x0, 0x200<<20, BOOT_MEM_RAM);
+		break;
+	case 2:
+		/* 256MiB */
+		add_memory_region(0x0, 0x100<<20, BOOT_MEM_RAM);
+		break;
+	case 1:
+		/* 128MiB */
+		add_memory_region(0x0,  0x80<<20, BOOT_MEM_RAM);
+		break;
+	case 0:
+		/* 1GiB -- needs CONFIG_HIGHMEM */
+		add_memory_region(0x0, 0x400<<20, BOOT_MEM_RAM);
+		break;
+	}
+}
+
+early_initcall(momenco_ocelot_c_setup);
+
+#ifndef CONFIG_MIPS64
+/* This needs to be one of the first initcalls, because no I/O port access
+   can work before this */
+static int io_base_ioremap(void)
+{
+	/* we're mapping PCI accesses from 0xc0000000 to 0xf0000000 */
+	void *io_remap_range = ioremap(0xc0000000, 0x30000000);
+
+	if (!io_remap_range) {
+		panic("Could not ioremap I/O port range");
+	}
+	printk("io_remap_range set at 0x%08x\n", (uint32_t)io_remap_range);
+	set_io_port_base(io_remap_range - 0xc0000000);
+
+	return 0;
+}
+
+module_init(io_base_ioremap);
+#endif
diff --git a/arch/mips/momentum/ocelot_c/uart-irq.c b/arch/mips/momentum/ocelot_c/uart-irq.c
new file mode 100644
index 0000000..ebe1507
--- /dev/null
+++ b/arch/mips/momentum/ocelot_c/uart-irq.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2002 Momentum Computer
+ * Author: mdharm@momenco.com
+ *
+ * arch/mips/momentum/ocelot_c/uart-irq.c
+ *     Interrupt routines for UARTs.  Interrupt numbers are assigned from
+ *     80 to 81 (2 interrupt sources).
+ *
+ * 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/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <asm/ptrace.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include "ocelot_c_fpga.h"
+
+static inline int ls1bit8(unsigned int x)
+{
+        int b = 7, s;
+
+        s =  4; if (((unsigned char)(x << 4)) == 0) s = 0; b -= s; x <<= s;
+        s =  2; if (((unsigned char)(x << 2)) == 0) s = 0; b -= s; x <<= s;
+        s =  1; if (((unsigned char)(x << 1)) == 0) s = 0; b -= s;
+
+        return b;
+}
+
+/* mask off an interrupt -- 0 is enable, 1 is disable */
+static inline void mask_uart_irq(unsigned int irq)
+{
+	uint8_t value;
+
+	value = OCELOT_FPGA_READ(UART_INTMASK);
+	value |= 1 << (irq - 74);
+	OCELOT_FPGA_WRITE(value, UART_INTMASK);
+
+	/* read the value back to assure that it's really been written */
+	value = OCELOT_FPGA_READ(UART_INTMASK);
+}
+
+/* unmask an interrupt -- 0 is enable, 1 is disable */
+static inline void unmask_uart_irq(unsigned int irq)
+{
+	uint8_t value;
+
+	value = OCELOT_FPGA_READ(UART_INTMASK);
+	value &= ~(1 << (irq - 74));
+	OCELOT_FPGA_WRITE(value, UART_INTMASK);
+
+	/* read the value back to assure that it's really been written */
+	value = OCELOT_FPGA_READ(UART_INTMASK);
+}
+
+/*
+ * Enables the IRQ in the FPGA
+ */
+static void enable_uart_irq(unsigned int irq)
+{
+	unmask_uart_irq(irq);
+}
+
+/*
+ * Initialize the IRQ in the FPGA
+ */
+static unsigned int startup_uart_irq(unsigned int irq)
+{
+	unmask_uart_irq(irq);
+	return 0;
+}
+
+/*
+ * Disables the IRQ in the FPGA
+ */
+static void disable_uart_irq(unsigned int irq)
+{
+	mask_uart_irq(irq);
+}
+
+/*
+ * Masks and ACKs an IRQ
+ */
+static void mask_and_ack_uart_irq(unsigned int irq)
+{
+	mask_uart_irq(irq);
+}
+
+/*
+ * End IRQ processing
+ */
+static void end_uart_irq(unsigned int irq)
+{
+	if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+		unmask_uart_irq(irq);
+}
+
+/*
+ * Interrupt handler for interrupts coming from the FPGA chip.
+ */
+void ll_uart_irq(struct pt_regs *regs)
+{
+	unsigned int irq_src, irq_mask;
+
+	/* read the interrupt status registers */
+	irq_src = OCELOT_FPGA_READ(UART_INTSTAT);
+	irq_mask = OCELOT_FPGA_READ(UART_INTMASK);
+
+	/* mask for just the interrupts we want */
+	irq_src &= ~irq_mask;
+
+	do_IRQ(ls1bit8(irq_src) + 74, regs);
+}
+
+#define shutdown_uart_irq	disable_uart_irq
+
+struct hw_interrupt_type uart_irq_type = {
+	"UART/FPGA",
+	startup_uart_irq,
+	shutdown_uart_irq,
+	enable_uart_irq,
+	disable_uart_irq,
+	mask_and_ack_uart_irq,
+	end_uart_irq,
+	NULL
+};
+
+void uart_irq_init(void)
+{
+	/* Reset irq handlers pointers to NULL */
+	irq_desc[80].status = IRQ_DISABLED;
+	irq_desc[80].action = 0;
+	irq_desc[80].depth = 2;
+	irq_desc[80].handler = &uart_irq_type;
+
+	irq_desc[81].status = IRQ_DISABLED;
+	irq_desc[81].action = 0;
+	irq_desc[81].depth = 2;
+	irq_desc[81].handler = &uart_irq_type;
+}