Alchemy support. Done by Pete and further hacked up a bit by me ...

29 files changed, 5279 insertions, 2 deletions

diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index cbbeca454..7c0a63e6c 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -233,6 +233,15 @@ LOADADDR      += 0x80100000
 endif
 
 #
+# Au1000 eval board
+#
+ifdef CONFIG_MIPS_PB1000
+LIBS          += arch/mips/au1000/pb1000/pb1000.o arch/mips/au1000/common/au1000.o
+SUBDIRS       += arch/mips/au1000/pb1000 arch/mips/au1000/common
+LOADADDR      += 0x80100000
+endif
+
+#
 # Choosing incompatible machines durings configuration will result in
 # error messages during linking.  Select a default linkscript if
 # none has been choosen above.
diff --git a/arch/mips/au1000/common/Makefile b/arch/mips/au1000/common/Makefile
new file mode 100644
index 000000000..5d8c60a93
--- /dev/null
+++ b/arch/mips/au1000/common/Makefile
@@ -0,0 +1,31 @@
+#
+#  Copyright 2000 MontaVista Software Inc.
+#  Author: MontaVista Software, Inc.
+#     	ppopov@mvista.com or support@mvista.com
+#
+# Makefile for the Alchemy Au1000 CPU, generic files.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+
+.S.s:
+	$(CPP) $(CFLAGS) $< -o $*.s
+.S.o:
+	$(CC) $(CFLAGS) -c $< -o $*.o
+
+all: au1000.o
+
+O_TARGET := au1000.o
+
+obj-y := prom.o dbg_io.o int-handler.o irq.o puts.o time.o reset.o
+
+obj-$(CONFIG_AU1000_UART) += serial.o             
+obj-$(CONFIG_REMOTE_DEBUG) += dbg_io.o             
+obj-$(CONFIG_BLK_DEV_INITRD) += ramdisk.o
+
+ramdisk.o: 
+	mkramobj ramdisk ramdisk.o
+
+include $(TOPDIR)/Rules.make
diff --git a/arch/mips/au1000/common/dbg_io.c b/arch/mips/au1000/common/dbg_io.c
new file mode 100644
index 000000000..4940db83c
--- /dev/null
+++ b/arch/mips/au1000/common/dbg_io.c
@@ -0,0 +1,118 @@
+
+#include <linux/config.h>
+#include <asm/io.h>
+#include <asm/au1000.h>
+
+#ifdef CONFIG_REMOTE_DEBUG
+
+/*
+ * FIXME the user should be able to select the
+ * uart to be used for debugging.
+ */
+#define	DEBUG_BASE  UART2_ADDR
+/**/
+
+/* we need uint32 uint8 */
+/* #include "types.h" */
+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
+
+
+#define UART_RX		0	/* Receive buffer */
+#define UART_TX		4	/* Transmit buffer */
+#define UART_IER	8	/* Interrupt Enable Register */
+#define UART_IIR	0xC	/* Interrupt ID Register */
+#define UART_FCR	0x10	/* FIFO Control Register */
+#define UART_LCR	0x14	/* Line Control Register */
+#define UART_MCR	0x18	/* Modem Control Register */
+#define UART_LSR	0x1C	/* Line Status Register */
+#define UART_MSR	0x20	/* Modem Status Register */
+#define UART_CLK	0x28	/* Baud Rat4e Clock Divider */
+#define UART_MOD_CNTRL	0x100	/* Module Control */
+
+/* memory-mapped read/write of the port */
+#define UART16550_READ(y)    (inl(DEBUG_BASE + y) & 0xff)
+#define UART16550_WRITE(y,z) (outl(z&0xff, DEBUG_BASE + y))
+
+void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
+{
+
+	if (UART16550_READ(UART_MOD_CNTRL) != 0x3) {
+		UART16550_WRITE(UART_MOD_CNTRL, 3);
+	}
+	cal_r4koff();
+
+	/* disable interrupts */
+	UART16550_WRITE(UART_IER, 0);
+
+	/* set up baud rate */
+	{ 
+		uint32 divisor;
+
+		/* set divisor */
+		divisor = get_au1000_uart_baud() / baud;
+		UART16550_WRITE(UART_CLK, divisor & 0xffff);
+	}
+
+	/* set data format */
+	UART16550_WRITE(UART_LCR, data | parity | stop);
+}
+
+static int remoteDebugInitialized = 0;
+
+uint8 getDebugChar(void)
+{
+	if (!remoteDebugInitialized) {
+		remoteDebugInitialized = 1;
+		debugInit(UART16550_BAUD_115200,
+			  UART16550_DATA_8BIT,
+			  UART16550_PARITY_NONE,
+			  UART16550_STOP_1BIT);
+	}
+
+	while((UART16550_READ(UART_LSR) & 0x1) == 0);
+	return UART16550_READ(UART_RX);
+}
+
+
+int putDebugChar(uint8 byte)
+{
+	int i;
+	if (!remoteDebugInitialized) {
+		remoteDebugInitialized = 1;
+		debugInit(UART16550_BAUD_115200,
+			  UART16550_DATA_8BIT,
+			  UART16550_PARITY_NONE,
+			  UART16550_STOP_1BIT);
+	}
+
+	while ((UART16550_READ(UART_LSR)&0x40) == 0);
+	UART16550_WRITE(UART_TX, byte);
+	//for (i=0;i<0xfff;i++);
+
+	return 1;
+}
+
+#endif
diff --git a/arch/mips/au1000/common/int-handler.S b/arch/mips/au1000/common/int-handler.S
new file mode 100644
index 000000000..c7c933036
--- /dev/null
+++ b/arch/mips/au1000/common/int-handler.S
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: ppopov@mvista.com
+ *
+ * Interrupt dispatcher for Au1000 boards.
+ *
+ * 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 <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+	.text
+	.set	macro
+	.set	noat
+	.align	5
+
+NESTED(au1000_IRQ, PT_SIZE, sp)
+	SAVE_ALL
+	CLI				# Important: mark KERNEL mode !
+
+	mfc0	t0,CP0_CAUSE		# get pending interrupts
+	mfc0	t1,CP0_STATUS		# get enabled interrupts
+	and	t0,t1			# isolate allowed ones
+
+	andi	t0,0xff00		# isolate pending bits
+	beqz	t0, 3f			# spurious interrupt
+
+	andi	a0, t0, CAUSEF_IP7
+	beq	a0, zero, 1f
+	move	a0, sp
+	jal	mips_timer_interrupt
+	j	ret_from_irq
+
+1:
+	andi	a0, t0, CAUSEF_IP2	# Interrupt Controller 0, Request 0
+/*	beq	a0, zero, 2f	      */   
+	move	a0,sp  
+	jal	intc0_req0_irqdispatch
+	j done
+2:
+	andi	a0, t0, CAUSEF_IP3	# Interrupt Controller 0, Request 1
+	beq	a0, zero, 3f	       
+	move	a0,sp  
+	jal	intc0_req1_irqdispatch
+	j done
+3:
+	andi	a0, t0, CAUSEF_IP4	# Interrupt Controller 1, Request 0
+	beq	a0, zero, 4f	       
+	move	a0,sp  
+	jal	intc1_req1_irqdispatch
+	j done
+4:
+	andi	a0, t0, CAUSEF_IP5	# Interrupt Controller 1, Request 1
+	beq	a0, zero, 5f	       
+	move	a0, sp  
+	jal	intc1_req1_irqdispatch
+
+5:	
+	move	a0, sp
+	jal	mips_spurious_interrupt
+done:
+	j	ret_from_irq
+END(au1000_IRQ)
diff --git a/arch/mips/au1000/common/irq.c b/arch/mips/au1000/common/irq.c
new file mode 100644
index 000000000..7dececa07
--- /dev/null
+++ b/arch/mips/au1000/common/irq.c
@@ -0,0 +1,642 @@
+/*
+ * BRIEF MODULE DESCRIPTION
+ *	Au1000 interrupt routines.
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *		ppopov@mvista.com or source@mvista.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.
+ *
+ *  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/malloc.h>
+#include <linux/random.h>
+
+#include <asm/bitops.h>
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/mipsregs.h>
+#include <asm/system.h>
+#include <asm/au1000.h>
+
+#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5)
+
+#undef DEBUG_IRQ
+#ifdef DEBUG_IRQ
+/* note: prints function name for you */
+#define DPRINTK(fmt, args...) printk("%s: " fmt, __FUNCTION__ , ## args)
+#else
+#define DPRINTK(fmt, args...)
+#endif
+
+#define EXT_INTC0_REQ0 2 /* IP 2 */
+#define EXT_INTC0_REQ1 3 /* IP 3 */
+#define EXT_INTC1_REQ0 4 /* IP 4 */
+#define EXT_INTC1_REQ1 5 /* IP 5 */
+#define MIPS_TIMER_IP  7 /* IP 7 */
+
+#ifdef CONFIG_REMOTE_DEBUG
+extern void breakpoint(void);
+#endif
+
+extern asmlinkage void au1000_IRQ(void);
+extern void set_debug_traps(void);
+irq_cpustat_t irq_stat [NR_CPUS];
+unsigned int local_bh_count[NR_CPUS];
+unsigned int local_irq_count[NR_CPUS];
+unsigned long spurious_count = 0;
+irq_desc_t irq_desc[NR_IRQS];
+
+static void setup_au1000_irq(unsigned int irq, int type, int int_req);
+static unsigned int startup_au1000_irq(unsigned int irq);
+static void enable_au1000_irq(unsigned int irq_nr);
+static void disable_au1000_irq(unsigned int irq_nr);
+static void end_au1000_irq(unsigned int irq_nr);
+
+static void ack_level_irq(unsigned int irq_nr);
+static void ack_rise_edge_irq(unsigned int irq_nr);
+static void ack_fall_edge_irq(unsigned int irq_nr);
+
+void disable_ack_irq(int irq);
+
+/* Function for careful CP0 interrupt mask access */
+static inline void modify_cp0_intmask(unsigned clr_mask, unsigned set_mask)
+{
+	unsigned long status = read_32bit_cp0_register(CP0_STATUS);
+	status &= ~((clr_mask & 0xFF) << 8);
+	status |=   (set_mask & 0xFF) << 8;
+	write_32bit_cp0_register(CP0_STATUS, status);
+}
+
+static inline void mask_cpu_irq_input(unsigned int irq_nr)
+{
+	modify_cp0_intmask(irq_nr, 0);
+}
+
+static inline void unmask_cpu_irq_input(unsigned int irq_nr)
+{
+	modify_cp0_intmask(0, irq_nr);
+}
+
+static void disable_cpu_irq_input(unsigned int irq_nr)
+{
+	unsigned long flags;
+
+	save_and_cli(flags);
+	mask_cpu_irq_input(irq_nr);
+	restore_flags(flags);
+}
+
+static void enable_cpu_irq_input(unsigned int irq_nr)
+{
+	unsigned long flags;
+
+	save_and_cli(flags);
+	unmask_cpu_irq_input(irq_nr);
+	restore_flags(flags);
+}
+
+
+static void setup_au1000_irq(unsigned int irq_nr, int type, int int_req)
+{
+	/* Config2[n], Config1[n], Config0[n] */
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		switch (type) {
+			case INTC_INT_RISE_EDGE: /* 0:0:1 */
+				outl(1<<irq_nr,INTC1_CONFIG2_CLEAR);
+				outl(1<<irq_nr, INTC1_CONFIG1_CLEAR);
+				outl(1<<irq_nr, INTC1_CONFIG0_SET);
+				break;
+			case INTC_INT_FALL_EDGE: /* 0:1:0 */
+				outl(1<<irq_nr, INTC1_CONFIG2_CLEAR);
+				outl(1<<irq_nr, INTC1_CONFIG1_SET);
+				outl(1<<irq_nr, INTC1_CONFIG0_CLEAR);
+				break;
+			case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
+				outl(1<<irq_nr, INTC1_CONFIG2_SET);
+				outl(1<<irq_nr, INTC1_CONFIG1_CLEAR);
+				outl(1<<irq_nr, INTC1_CONFIG0_SET);
+				break;
+			case INTC_INT_LOW_LEVEL: /* 1:1:0 */
+				outl(1<<irq_nr, INTC1_CONFIG2_SET);
+				outl(1<<irq_nr, INTC1_CONFIG1_SET);
+				outl(1<<irq_nr, INTC1_CONFIG0_CLEAR);
+				break;
+			case INTC_INT_DISABLED: /* 0:0:0 */
+				outl(1<<irq_nr, INTC1_CONFIG0_CLEAR);
+				outl(1<<irq_nr, INTC1_CONFIG1_CLEAR);
+				outl(1<<irq_nr, INTC1_CONFIG2_CLEAR);
+				break;
+			default: /* disable the interrupt */
+				printk("unexpected int type %d (irq %d)\n", type, irq_nr);
+				outl(1<<irq_nr, INTC1_CONFIG0_CLEAR);
+				outl(1<<irq_nr, INTC1_CONFIG1_CLEAR);
+				outl(1<<irq_nr, INTC1_CONFIG2_CLEAR);
+				return;
+		}
+		if (int_req) /* assign to interrupt request 1 */
+			outl(1<<irq_nr, INTC1_ASSIGN_REQ_CLEAR);
+		else	     /* assign to interrupt request 0 */
+			outl(1<<irq_nr, INTC1_ASSIGN_REQ_SET);
+		outl(1<<irq_nr, INTC1_SOURCE_SET);
+		outl(1<<irq_nr, INTC1_MASK_CLEAR);
+	}
+	else {
+		switch (type) {
+			case INTC_INT_RISE_EDGE: /* 0:0:1 */
+				printk("irq %d: rise edge\n", irq_nr);
+				outl(1<<irq_nr,INTC0_CONFIG2_CLEAR);
+				outl(1<<irq_nr, INTC0_CONFIG1_CLEAR);
+				outl(1<<irq_nr, INTC0_CONFIG0_SET);
+				break;
+			case INTC_INT_FALL_EDGE: /* 0:1:0 */
+				outl(1<<irq_nr, INTC0_CONFIG2_CLEAR);
+				outl(1<<irq_nr, INTC0_CONFIG1_SET);
+				outl(1<<irq_nr, INTC0_CONFIG0_CLEAR);
+				break;
+			case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
+				outl(1<<irq_nr, INTC0_CONFIG2_SET);
+				outl(1<<irq_nr, INTC0_CONFIG1_CLEAR);
+				outl(1<<irq_nr, INTC0_CONFIG0_SET);
+				break;
+			case INTC_INT_LOW_LEVEL: /* 1:1:0 */
+				outl(1<<irq_nr, INTC0_CONFIG2_SET);
+				outl(1<<irq_nr, INTC0_CONFIG1_SET);
+				outl(1<<irq_nr, INTC0_CONFIG0_CLEAR);
+				break;
+			case INTC_INT_DISABLED: /* 0:0:0 */
+				outl(1<<irq_nr, INTC0_CONFIG0_CLEAR);
+				outl(1<<irq_nr, INTC0_CONFIG1_CLEAR);
+				outl(1<<irq_nr, INTC0_CONFIG2_CLEAR);
+				break;
+			default: /* disable the interrupt */
+				printk("unexpected int type %d (irq %d)\n", type, irq_nr);
+				outl(1<<irq_nr, INTC0_CONFIG0_CLEAR);
+				outl(1<<irq_nr, INTC0_CONFIG1_CLEAR);
+				outl(1<<irq_nr, INTC0_CONFIG2_CLEAR);
+				return;
+		}
+		if (int_req) /* assign to interrupt request 1 */
+			outl(1<<irq_nr, INTC0_ASSIGN_REQ_CLEAR);
+		else	     /* assign to interrupt request 0 */
+			outl(1<<irq_nr, INTC0_ASSIGN_REQ_SET);
+		outl(1<<irq_nr, INTC0_SOURCE_SET);
+		outl(1<<irq_nr, INTC0_MASK_CLEAR);
+	}
+}
+
+static unsigned int startup_au1000_irq(unsigned int irq_nr)
+{
+	return 0; 
+}
+
+static void shutdown_au1000_irq(unsigned int irq_nr)
+{
+	/* *really* disable this interrupt */
+	disable_au1000_irq(irq_nr);
+	setup_au1000_irq(irq_nr, INTC_INT_DISABLED, 0);
+	return;
+}
+
+static void enable_au1000_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		outl(1<<irq_nr, INTC1_MASK_SET);
+	}
+	else {
+		outl(1<<irq_nr, INTC0_MASK_SET);
+	}
+}
+
+void enable_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		outl(1<<irq_nr, INTC1_MASK_SET);
+	}
+	else {
+		outl(1<<irq_nr, INTC0_MASK_SET);
+	}
+}
+
+static void disable_au1000_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		outl(1<<irq_nr, INTC1_MASK_CLEAR);
+	}
+	else {
+		outl(1<<irq_nr, INTC0_MASK_CLEAR);
+	}
+}
+
+void disable_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		outl(1<<irq_nr, INTC1_MASK_CLEAR);
+	}
+	else {
+		outl(1<<irq_nr, INTC0_MASK_CLEAR);
+	}
+}
+
+void ack_rise_edge_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		outl(1<<irq_nr, INTC1_R_EDGE_DETECT_CLEAR);
+	}
+	else {
+		outl(1<<irq_nr, INTC0_R_EDGE_DETECT_CLEAR);
+	}
+}
+
+static void ack_fall_edge_irq(unsigned int irq_nr)
+{
+	if (irq_nr > AU1000_LAST_INTC0_INT) {
+		outl(1<<irq_nr, INTC1_R_EDGE_DETECT_CLEAR);
+	}
+	else {
+		outl(1<<irq_nr, INTC0_R_EDGE_DETECT_CLEAR);
+	}
+}
+
+static void ack_level_irq(unsigned int irq_nr)
+{
+	return;
+}
+
+static void end_au1000_irq(unsigned int irq_nr)
+{
+	if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
+		enable_au1000_irq(irq_nr);
+}
+
+
+static struct hw_interrupt_type rise_edge_irq_type = {
+	"Au1000 Rise Edge",
+	startup_au1000_irq,
+	shutdown_au1000_irq,
+	enable_au1000_irq,
+	disable_au1000_irq,
+	ack_rise_edge_irq,
+	end_au1000_irq,
+	NULL
+};
+
+static struct hw_interrupt_type fall_edge_irq_type = {
+	"Au1000 Edge",
+	startup_au1000_irq,
+	shutdown_au1000_irq,
+	enable_au1000_irq,
+	disable_au1000_irq,
+	ack_fall_edge_irq,
+	end_au1000_irq,
+	NULL
+};
+
+static struct hw_interrupt_type level_irq_type = {
+	"Au1000 Level",
+	startup_au1000_irq,
+	shutdown_au1000_irq,
+	enable_au1000_irq,
+	disable_au1000_irq,
+	ack_level_irq,
+	end_au1000_irq,
+	NULL
+};
+
+
+int get_irq_list(char *buf)
+{
+	int i, len = 0, j;
+	struct irqaction * action;
+
+	len += sprintf(buf+len, "	    ");
+	for (j=0; j<smp_num_cpus; j++)
+		len += sprintf(buf+len, "CPU%d	     ",j);
+	*(char *)(buf+len++) = '\n';
+
+	for (i = 0 ; i < NR_IRQS ; i++) {
+		action = irq_desc[i].action;
+		if ( !action || !action->handler )
+			continue;
+		len += sprintf(buf+len, "%3d: ", i);		
+		len += sprintf(buf+len, "%10u ", kstat_irqs(i));
+		if ( irq_desc[i].handler )		
+			len += sprintf(buf+len, " %s ", irq_desc[i].handler->typename );
+		else
+			len += sprintf(buf+len, "  None	     ");
+		len += sprintf(buf+len, "    %s",action->name);
+		for (action=action->next; action; action = action->next) {
+			len += sprintf(buf+len, ", %s", action->name);
+		}
+		len += sprintf(buf+len, "\n");
+	}
+	len += sprintf(buf+len, "BAD: %10lu\n", spurious_count);
+	return len;
+}
+
+asmlinkage void do_IRQ(int irq, struct pt_regs *regs)
+{
+	struct irqaction *action;
+	irq_desc_t *desc = irq_desc + irq;
+	int cpu;
+
+	cpu = smp_processor_id();
+	irq_enter(cpu, irq);
+
+	kstat.irqs[cpu][irq]++;
+	desc->handler->ack(irq);
+
+	action = irq_desc[irq].action;
+
+	if (action && action->handler)
+	{
+		//desc->handler->disable(irq);
+		//if (!(action->flags & SA_INTERRUPT)) __sti(); /* reenable ints */
+		do { 
+			action->handler(irq, action->dev_id, regs);
+			action = action->next;
+		} while ( action );
+		//__cli(); /* disable ints */
+		//desc->handler->ack(irq);
+		//desc->handler->enable(irq);
+	}
+	else
+	{
+		spurious_count++;
+		printk("Unhandled interrupt %d, cause %x, disabled\n", 
+				(unsigned)irq, (unsigned)regs->cp0_cause);
+		desc->handler->disable(irq);
+	}
+	irq_exit(cpu, irq);
+#if 0
+	if (softirq_active(cpu) & softirq_mask(cpu))
+		do_softirq();
+#endif
+}
+
+int request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
+	unsigned long irqflags, const char * devname, void *dev_id)
+{
+	struct irqaction *old, **p, *action;
+	unsigned long flags, shared=0;
+	irq_desc_t *desc = irq_desc + irq;
+	unsigned long cp0_status;
+
+	cp0_status = read_32bit_cp0_register(CP0_STATUS);
+
+	if (irq >= NR_IRQS) 
+		return -EINVAL;
+
+	if (!handler)
+	{
+		/* Free */
+		for (p = &irq_desc[irq].action; (action = *p) != NULL; p = &action->next)
+		{
+			/* Found it - now free it */
+			save_flags(flags);
+			cli();
+			*p = action->next;
+			desc->handler->disable(irq);
+			desc->handler->ack(irq);
+			restore_flags(flags);
+			kfree(action);
+			return 0;
+		}
+		return -ENOENT;
+	}
+	
+	action = (struct irqaction *)
+		kmalloc(sizeof(struct irqaction), GFP_KERNEL);
+	if (!action)
+		return -ENOMEM;
+	memset(action, 0, sizeof(struct irqaction));
+	
+	action->handler = handler;
+	action->flags = irqflags;					
+	action->mask = 0;
+	action->name = devname;
+	action->dev_id = dev_id;
+	action->next = NULL;
+
+	p = &irq_desc[irq].action;
+	
+	spin_lock_irqsave(&desc->lock,flags);
+	if ((old = *p) != NULL) {
+		/* Can't share interrupts unless both agree to */
+		if (!(old->flags & action->flags & SA_SHIRQ)) {
+			spin_unlock_irqrestore(&desc->lock,flags);
+			return -EBUSY;
+		}
+		/* add new interrupt at end of irq queue */
+		do {
+			p = &old->next;
+			old = *p;
+		} while (old);
+		shared = 1;
+	}
+	*p = action;
+	if (!shared) {
+		desc->depth = 0;
+		desc->status &= ~(IRQ_DISABLED | IRQ_AUTODETECT | IRQ_WAITING);
+		desc->handler->startup(irq);
+		desc->handler->ack(irq);
+		desc->handler->enable(irq);
+	}
+	else {
+		printk("irq %d is shared\n", irq);
+	}
+	spin_unlock_irqrestore(&desc->lock,flags);
+	return 0;
+}
+		
+void free_irq(unsigned int irq, void *dev_id)
+{
+	request_irq(irq, NULL, 0, NULL, dev_id);
+}
+
+void enable_cpu_timer(void)
+{
+	enable_cpu_irq_input(1<<MIPS_TIMER_IP); /* timer interrupt */
+}
+
+unsigned long probe_irq_on (void)
+{
+	return 0;
+}
+
+int probe_irq_off (unsigned long irqs)
+{
+	return 0;
+}
+
+
+void __init init_IRQ(void)
+{
+	int i;
+	unsigned long cp0_status;
+
+	cp0_status = read_32bit_cp0_register(CP0_STATUS);
+	memset(irq_desc, 0, sizeof(irq_desc));
+	set_except_vector(0, au1000_IRQ);
+
+	for (i = 0; i <= NR_IRQS; i++) {
+		irq_desc[i].status	= IRQ_DISABLED;
+		irq_desc[i].action	= 0;
+		irq_desc[i].depth	= 1;
+		switch (i) {
+#if 0
+			case AU1000_MAC0_DMA_INT:
+				setup_au1000_irq(i, INTC_INT_RISE_EDGE, 0);
+				irq_desc[i].handler = &rise_edge_irq_type;
+				break;
+#endif
+			default: /* active high, level interrupt */
+				setup_au1000_irq(i, INTC_INT_HIGH_LEVEL, 0);
+				disable_au1000_irq(i);
+				irq_desc[i].handler = &level_irq_type;
+				break;
+		}
+	}
+
+	set_cp0_status(ALLINTS);
+#ifdef CONFIG_REMOTE_DEBUG
+	/* If local serial I/O used for debug port, enter kgdb at once */
+	puts("Waiting for kgdb to connect...");
+	set_debug_traps();
+	breakpoint(); 
+#endif
+}
+
+
+/*
+ * Ack an int, in case we missed an interrupt ack somewhere.
+ * This can be used for edge interrupts, in an error recovery
+ * routine.
+ */
+void disable_ack_irq(int irq)
+{
+	irq_desc_t *desc = irq_desc + irq;
+
+	desc->handler->disable(irq);
+	desc->handler->ack(irq);
+}
+
+void mips_spurious_interrupt(struct pt_regs *regs)
+{
+#if 0
+	return;
+#else
+	unsigned cause;
+
+	cause = read_32bit_cp0_register(CP0_CAUSE);
+	printk("spurious int (epc %x) (cause %x) (badvaddr %x)\n",
+			(unsigned)regs->cp0_epc, cause, (unsigned)regs->cp0_badvaddr);
+#endif
+}
+
+void intc0_req0_irqdispatch(struct pt_regs *regs)
+{
+	int irq = 0;
+	unsigned long int_request;
+
+	int_request = inl(INTC0_REQ0_INT);
+
+	if (!int_request) return;
+
+	for (;;) {
+		if (!(int_request & 0x1)) {
+			irq++;
+			int_request >>= 1;
+		}
+		else break;
+	}
+	do_IRQ(irq, regs);
+}
+
+void intc0_req1_irqdispatch(struct pt_regs *regs)
+{
+	int irq = 0;
+	unsigned long int_request;
+
+	int_request = inl(INTC0_REQ1_INT);
+
+	if (!int_request) return;
+
+	for (;;) {
+		if (!(int_request & 0x1)) {
+			irq++;
+			int_request >>= 1;
+		}
+		else break;
+	}
+	do_IRQ(irq, regs);
+}
+
+void intc1_req0_irqdispatch(struct pt_regs *regs)
+{
+	int irq = 0;
+	unsigned long int_request;
+
+	int_request = inl(INTC1_REQ0_INT);
+
+	if (!int_request) return;
+
+	for (;;) {
+		if (!(int_request & 0x1)) {
+			irq++;
+			int_request >>= 1;
+		}
+		else break;
+	}
+	do_IRQ(irq, regs);
+}
+
+void intc1_req1_irqdispatch(struct pt_regs *regs)
+{
+	int irq = 0;
+	unsigned long int_request;
+
+	int_request = inl(INTC1_REQ1_INT);
+
+	if (!int_request) return;
+
+	for (;;) {
+		if (!(int_request & 0x1)) {
+			irq++;
+			int_request >>= 1;
+		}
+		else break;
+	}
+	do_IRQ(irq, regs);
+}
+
+void show_pending_irqs(void)
+{
+}
diff --git a/arch/mips/au1000/common/prom.c b/arch/mips/au1000/common/prom.c
new file mode 100644
index 000000000..1c64aa1c4
--- /dev/null
+++ b/arch/mips/au1000/common/prom.c
@@ -0,0 +1,121 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *    PROM library initialisation code, assuming a version of
+ *    pmon is the boot code.
+ *
+ * Copyright 2000 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *         	ppopov@mvista.com or support@mvista.com
+ *
+ * This file was derived from Carsten Langgaard's 
+ * arch/mips/mips-boards/xx files.
+ *
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  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/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+
+/* #define DEBUG_CMDLINE */
+
+char arcs_cmdline[COMMAND_LINE_SIZE];
+int prom_argc;
+char **prom_argv, **prom_envp;
+
+typedef struct
+{
+    char *name;
+/*    char *val; */
+}t_env_var;
+
+
+char * __init prom_getcmdline(void)
+{
+	return &(arcs_cmdline[0]);
+}
+
+void  __init prom_init_cmdline(void)
+{
+	char *cp;
+	int actr;
+
+	actr = 1; /* Always ignore argv[0] */
+
+	cp = &(arcs_cmdline[0]);
+	while(actr < prom_argc) {
+	        strcpy(cp, prom_argv[actr]);
+		cp += strlen(prom_argv[actr]);
+		*cp++ = ' ';
+		actr++;
+	}
+	if (cp != &(arcs_cmdline[0])) /* get rid of trailing space */
+		--cp;
+	*cp = '\0';
+
+}
+
+
+char *prom_getenv(char *envname)
+{
+	/*
+	 * Return a pointer to the given environment variable.
+	 * Environment variables are stored in the form of "memsize=64".
+	 */
+
+	t_env_var *env = (t_env_var *)prom_envp;
+	int i;
+
+	i = strlen(envname);
+
+	while(env->name) {
+		if(strncmp(envname, env->name, i) == 0) {
+			return(env->name + strlen(envname) + 1);
+		}
+		env++;
+	}
+	return(NULL);
+}
+
+static inline unsigned char str2hexnum(unsigned char c)
+{
+	if(c >= '0' && c <= '9')
+	return c - '0';
+	if(c >= 'a' && c <= 'f')
+	return c - 'a' + 10;
+	return 0; /* foo */
+}
+
+int __init page_is_ram(unsigned long pagenr)
+{
+    return 1;
+}
+
+void prom_free_prom_memory (void)
+{
+}
diff --git a/arch/mips/au1000/common/puts.c b/arch/mips/au1000/common/puts.c
new file mode 100644
index 000000000..ab0a966f4
--- /dev/null
+++ b/arch/mips/au1000/common/puts.c
@@ -0,0 +1,144 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *	Low level uart routines to directly access a 16550 uart.
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *         	ppopov@mvista.com or support@mvista.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.
+ *
+ *  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/types.h>
+
+#define SERIAL_BASE   0xB1100000 /* au1000, uart 0 */
+#define SER_CMD       0x7
+#define SER_DATA      0x1
+#define TX_BUSY       0x20
+
+#define TIMEOUT       0xffffff
+#define SLOW_DOWN
+
+static const char digits[16] = "0123456789abcdef";
+static volatile unsigned long * const com1 = (unsigned char *)SERIAL_BASE;
+
+
+#ifdef SLOW_DOWN
+static inline void slow_down()
+{
+    int k;
+    for (k=0; k<10000; k++);
+}
+#else
+#define slow_down()
+#endif
+
+void
+putch(const unsigned char c)
+{
+    unsigned char ch;
+    int i = 0;
+
+    do {
+        ch = com1[SER_CMD];
+        slow_down();
+        i++;
+        if (i>TIMEOUT) {
+            break;
+        }
+    } while (0 == (ch & TX_BUSY));
+    com1[SER_DATA] = c;
+}
+
+void
+puts(unsigned char *cp)
+{
+    unsigned char ch;
+    int i = 0;
+
+    while (*cp) {
+        do {
+             ch = com1[SER_CMD];
+            slow_down();
+            i++;
+            if (i>TIMEOUT) {
+                break;
+            }
+        } while (0 == (ch & TX_BUSY));
+        com1[SER_DATA] = *cp++;
+    }
+    putch('\r');
+    putch('\n');
+}
+
+void
+fputs(unsigned char *cp)
+{
+    unsigned char ch;
+    int i = 0;
+
+    while (*cp) {
+
+        do {
+             ch = com1[SER_CMD];
+             slow_down();
+            i++;
+            if (i>TIMEOUT) {
+                break;
+            }
+        } while (0 == (ch & TX_BUSY));
+        com1[SER_DATA] = *cp++;
+    }
+}
+
+
+void
+put64(uint64_t ul)
+{
+    int cnt;
+    unsigned ch;
+
+    cnt = 16;            /* 16 nibbles in a 64 bit long */
+    putch('0');
+    putch('x');
+    do {
+        cnt--;
+        ch = (unsigned char)(ul >> cnt * 4) & 0x0F;
+                putch(digits[ch]);
+    } while (cnt > 0);
+}
+
+void
+put32(unsigned u)
+{
+    int cnt;
+    unsigned ch;
+
+    cnt = 8;            /* 8 nibbles in a 32 bit long */
+    putch('0');
+    putch('x');
+    do {
+        cnt--;
+        ch = (unsigned char)(u >> cnt * 4) & 0x0F;
+                putch(digits[ch]);
+    } while (cnt > 0);
+}
diff --git a/arch/mips/au1000/common/reset.c b/arch/mips/au1000/common/reset.c
new file mode 100644
index 000000000..09e89388e
--- /dev/null
+++ b/arch/mips/au1000/common/reset.c
@@ -0,0 +1,60 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *	Au1000 reset routines.
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *         	ppopov@mvista.com or source@mvista.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.
+ *
+ *  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/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>
+
+void au1000_restart(char *command)
+{
+	set_cp0_status(ST0_BEV | ST0_ERL);
+	set_cp0_config(CONF_CM_UNCACHED);
+	flush_cache_all();
+	write_32bit_cp0_register(CP0_WIRED, 0);
+	__asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
+}
+
+void au1000_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 au1000_power_off(void)
+{
+	au1000_halt();
+}
diff --git a/arch/mips/au1000/common/serial.c b/arch/mips/au1000/common/serial.c
new file mode 100644
index 000000000..6737aedff
--- /dev/null
+++ b/arch/mips/au1000/common/serial.c
@@ -0,0 +1,3100 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *	Au1000 serial port driver.
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *         	ppopov@mvista.com or source@mvista.com
+ *
+ *  Derived almost entirely from drivers/char/serial.c:
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *  Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 
+ * 		1998, 1999  Theodore Ts'o
+ *
+ *  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.
+ */
+
+static char *serial_version = "1.01";
+static char *serial_revdate = "2001-02-08";
+
+
+#include <linux/config.h>
+#include <linux/version.h>
+
+#undef SERIAL_PARANOIA_CHECK
+#define CONFIG_SERIAL_NOPAUSE_IO
+#define SERIAL_DO_RESTART
+
+
+/* Set of debugging defines */
+
+#undef SERIAL_DEBUG_INTR
+#undef SERIAL_DEBUG_OPEN
+#undef SERIAL_DEBUG_FLOW
+#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+#undef SERIAL_DEBUG_PCI
+#undef SERIAL_DEBUG_AUTOCONF
+
+#ifdef MODULE
+#undef CONFIG_AU1000_SERIAL_CONSOLE
+#endif
+
+#define CONFIG_SERIAL_RSA
+
+#define RS_STROBE_TIME (10*HZ)
+#define RS_ISR_PASS_LIMIT 256
+  
+/*
+ * End of serial driver configuration section.
+ */
+
+#ifdef MODVERSIONS
+#include <linux/modversions.h>
+#endif
+#include <linux/module.h>
+
+#include <linux/types.h>
+#ifdef LOCAL_HEADERS
+#include "serial_local.h"
+#else
+#include <linux/serial.h>
+#include <linux/serialP.h>
+#include <asm/au1000.h>
+#include <asm/serial.h>
+#define LOCAL_VERSTRING ""
+#endif
+
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/malloc.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <linux/delay.h>
+#ifdef CONFIG_AU1000_SERIAL_CONSOLE
+#include <linux/console.h>
+#endif
+#ifdef CONFIG_MAGIC_SYSRQ
+#include <linux/sysrq.h>
+#endif
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/bitops.h>
+
+#ifdef CONFIG_MAC_SERIAL
+#define SERIAL_DEV_OFFSET	2
+#else
+#define SERIAL_DEV_OFFSET	0
+#endif
+
+#ifdef SERIAL_INLINE
+#define _INLINE_ inline
+#else
+#define _INLINE_
+#endif
+
+static char *serial_name = "Serial driver";
+
+static DECLARE_TASK_QUEUE(tq_serial);
+
+static struct tty_driver serial_driver, callout_driver;
+static int serial_refcount;
+
+static struct timer_list serial_timer;
+
+extern unsigned long get_au1000_uart_baud(void);
+
+/* serial subtype definitions */
+#ifndef SERIAL_TYPE_NORMAL
+#define SERIAL_TYPE_NORMAL	1
+#define SERIAL_TYPE_CALLOUT	2
+#endif
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS 256
+
+/*
+ * IRQ_timeout		- How long the timeout should be for each IRQ
+ * 				should be after the IRQ has been active.
+ */
+
+static struct async_struct *IRQ_ports[NR_IRQS];
+static int IRQ_timeout[NR_IRQS];
+#ifdef CONFIG_AU1000_SERIAL_CONSOLE
+static struct console sercons;
+static int lsr_break_flag;
+#endif
+#if defined(CONFIG_AU1000_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+static unsigned long break_pressed; /* break, really ... */
+#endif
+
+static void autoconfig(struct serial_state * state);
+static void change_speed(struct async_struct *info, struct termios *old);
+static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
+
+/*
+ * Here we define the default xmit fifo size used for each type of
+ * UART
+ */
+static struct serial_uart_config uart_config[] = {
+	{ "unknown", 1, 0 }, 
+	{ "8250", 1, 0 }, 
+	{ "16450", 1, 0 }, 
+	{ "16550", 1, 0 }, 
+	{ 0, 0}
+};
+
+
+static struct serial_state rs_table[RS_TABLE_SIZE] = {
+	SERIAL_PORT_DFNS	/* Defined in serial.h */
+};
+
+#define NR_PORTS	(sizeof(rs_table)/sizeof(struct serial_state))
+
+#ifndef PREPARE_FUNC
+#define PREPARE_FUNC(dev)  (dev->prepare)
+#define ACTIVATE_FUNC(dev)  (dev->activate)
+#define DEACTIVATE_FUNC(dev)  (dev->deactivate)
+#endif
+
+#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
+
+static struct tty_struct *serial_table[NR_PORTS];
+static struct termios *serial_termios[NR_PORTS];
+static struct termios *serial_termios_locked[NR_PORTS];
+
+
+#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
+#define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
+ kdevname(tty->device), (info->flags), serial_refcount,info->count,tty->count,s)
+#else
+#define DBG_CNT(s)
+#endif
+
+/*
+ * tmp_buf is used as a temporary buffer by serial_write.  We need to
+ * lock it in case the copy_from_user blocks while swapping in a page,
+ * and some other program tries to do a serial write at the same time.
+ * Since the lock will only come under contention when the system is
+ * swapping and available memory is low, it makes sense to share one
+ * buffer across all the serial ports, since it significantly saves
+ * memory if large numbers of serial ports are open.
+ */
+static unsigned char *tmp_buf;
+#ifdef DECLARE_MUTEX
+static DECLARE_MUTEX(tmp_buf_sem);
+#else
+static struct semaphore tmp_buf_sem = MUTEX;
+#endif
+
+
+static inline int serial_paranoia_check(struct async_struct *info,
+					kdev_t device, const char *routine)
+{
+#ifdef SERIAL_PARANOIA_CHECK
+	static const char *badmagic =
+		"Warning: bad magic number for serial struct (%s) in %s\n";
+	static const char *badinfo =
+		"Warning: null async_struct for (%s) in %s\n";
+
+	if (!info) {
+		printk(badinfo, kdevname(device), routine);
+		return 1;
+	}
+	if (info->magic != SERIAL_MAGIC) {
+		printk(badmagic, kdevname(device), routine);
+		return 1;
+	}
+#endif
+	return 0;
+}
+
+
+static _INLINE_ unsigned int serial_in(struct async_struct *info, int offset)
+{
+	return (inl(info->port+offset) & 0xff);
+}
+
+static _INLINE_ void serial_out(struct async_struct *info, int offset, int value)
+{
+	outl(value & 0xff, info->port+offset);
+}
+
+
+/*
+ * We used to support using pause I/O for certain machines.  We
+ * haven't supported this for a while, but just in case it's badly
+ * needed for certain old 386 machines, I've left these #define's
+ * in....
+ */
+#define serial_inp(info, offset)		serial_in(info, offset)
+#define serial_outp(info, offset, value)	serial_out(info, offset, value)
+
+
+/*
+ * ------------------------------------------------------------
+ * rs_stop() and rs_start()
+ *
+ * This routines are called before setting or resetting tty->stopped.
+ * They enable or disable transmitter interrupts, as necessary.
+ * ------------------------------------------------------------
+ */
+static void rs_stop(struct tty_struct *tty)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+
+	if (serial_paranoia_check(info, tty->device, "rs_stop"))
+		return;
+	
+	save_flags(flags); cli();
+	if (info->IER & UART_IER_THRI) {
+		info->IER &= ~UART_IER_THRI;
+		serial_out(info, UART_IER, info->IER);
+	}
+	restore_flags(flags);
+}
+
+static void rs_start(struct tty_struct *tty)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+	
+	if (serial_paranoia_check(info, tty->device, "rs_start"))
+		return;
+	
+	save_flags(flags); cli();
+	if (info->xmit.head != info->xmit.tail
+	    && info->xmit.buf
+	    && !(info->IER & UART_IER_THRI)) {
+		info->IER |= UART_IER_THRI;
+		serial_out(info, UART_IER, info->IER);
+	}
+	restore_flags(flags);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * Here starts the interrupt handling routines.  All of the following
+ * subroutines are declared as inline and are folded into
+ * rs_interrupt().  They were separated out for readability's sake.
+ *
+ * Note: rs_interrupt() is a "fast" interrupt, which means that it
+ * runs with interrupts turned off.  People who may want to modify
+ * rs_interrupt() should try to keep the interrupt handler as fast as
+ * possible.  After you are done making modifications, it is not a bad
+ * idea to do:
+ * 
+ * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
+ *
+ * and look at the resulting assemble code in serial.s.
+ *
+ * 				- Ted Ts'o (tytso@mit.edu), 7-Mar-93
+ * -----------------------------------------------------------------------
+ */
+
+/*
+ * This routine is used by the interrupt handler to schedule
+ * processing in the software interrupt portion of the driver.
+ */
+static _INLINE_ void rs_sched_event(struct async_struct *info,
+				  int event)
+{
+	info->event |= 1 << event;
+	queue_task(&info->tqueue, &tq_serial);
+	mark_bh(SERIAL_BH);
+}
+
+static _INLINE_ void receive_chars(struct async_struct *info,
+				 int *status, struct pt_regs * regs)
+{
+	struct tty_struct *tty = info->tty;
+	unsigned char ch;
+	int ignored = 0;
+	struct	async_icount *icount;
+
+	icount = &info->state->icount;
+	do {
+		ch = serial_inp(info, UART_RX);
+		if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+			goto ignore_char;
+		*tty->flip.char_buf_ptr = ch;
+		icount->rx++;
+		
+#ifdef SERIAL_DEBUG_INTR
+		printk("DR%02x:%02x...", ch, *status);
+#endif
+		*tty->flip.flag_buf_ptr = 0;
+		if (*status & (UART_LSR_BI | UART_LSR_PE |
+			       UART_LSR_FE | UART_LSR_OE)) {
+			/*
+			 * For statistics only
+			 */
+			if (*status & UART_LSR_BI) {
+				*status &= ~(UART_LSR_FE | UART_LSR_PE);
+				icount->brk++;
+				/*
+				 * We do the SysRQ and SAK checking
+				 * here because otherwise the break
+				 * may get masked by ignore_status_mask
+				 * or read_status_mask.
+				 */
+#if defined(CONFIG_AU1000_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+				if (info->line == sercons.index) {
+					if (!break_pressed) {
+						break_pressed = jiffies;
+						goto ignore_char;
+					}
+					break_pressed = 0;
+				}
+#endif
+				if (info->flags & ASYNC_SAK)
+					do_SAK(tty);
+			} else if (*status & UART_LSR_PE)
+				icount->parity++;
+			else if (*status & UART_LSR_FE)
+				icount->frame++;
+			if (*status & UART_LSR_OE)
+				icount->overrun++;
+
+			/*
+			 * Now check to see if character should be
+			 * ignored, and mask off conditions which
+			 * should be ignored.
+			 */
+			if (*status & info->ignore_status_mask) {
+				if (++ignored > 100)
+					break;
+				goto ignore_char;
+			}
+			*status &= info->read_status_mask;
+
+#ifdef CONFIG_AU1000_SERIAL_CONSOLE
+			if (info->line == sercons.index) {
+				/* Recover the break flag from console xmit */
+				*status |= lsr_break_flag;
+				lsr_break_flag = 0;
+			}
+#endif
+			if (*status & (UART_LSR_BI)) {
+#ifdef SERIAL_DEBUG_INTR
+				printk("handling break....");
+#endif
+				*tty->flip.flag_buf_ptr = TTY_BREAK;
+			} else if (*status & UART_LSR_PE)
+				*tty->flip.flag_buf_ptr = TTY_PARITY;
+			else if (*status & UART_LSR_FE)
+				*tty->flip.flag_buf_ptr = TTY_FRAME;
+			if (*status & UART_LSR_OE) {
+				/*
+				 * Overrun is special, since it's
+				 * reported immediately, and doesn't
+				 * affect the current character
+				 */
+				tty->flip.count++;
+				tty->flip.flag_buf_ptr++;
+				tty->flip.char_buf_ptr++;
+				*tty->flip.flag_buf_ptr = TTY_OVERRUN;
+				if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+					goto ignore_char;
+			}
+		}
+#if defined(CONFIG_AU1000_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
+		if (break_pressed && info->line == sercons.index) {
+			if (ch != 0 &&
+			    time_before(jiffies, break_pressed + HZ*5)) {
+				handle_sysrq(ch, regs, NULL, NULL);
+				break_pressed = 0;
+				goto ignore_char;
+			}
+			break_pressed = 0;
+		}
+#endif
+		tty->flip.flag_buf_ptr++;
+		tty->flip.char_buf_ptr++;
+		tty->flip.count++;
+	ignore_char:
+		*status = serial_inp(info, UART_LSR);
+	} while (*status & UART_LSR_DR);
+	tty_flip_buffer_push(tty);
+}
+
+static _INLINE_ void transmit_chars(struct async_struct *info, int *intr_done)
+{
+	int count;
+
+	if (info->x_char) {
+		serial_outp(info, UART_TX, info->x_char);
+		info->state->icount.tx++;
+		info->x_char = 0;
+		if (intr_done)
+			*intr_done = 0;
+		return;
+	}
+	if (info->xmit.head == info->xmit.tail
+	    || info->tty->stopped
+	    || info->tty->hw_stopped) {
+		info->IER &= ~UART_IER_THRI;
+		serial_out(info, UART_IER, info->IER);
+		return;
+	}
+	
+	count = info->xmit_fifo_size;
+	do {
+		serial_out(info, UART_TX, info->xmit.buf[info->xmit.tail]);
+		info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1);
+		info->state->icount.tx++;
+		if (info->xmit.head == info->xmit.tail)
+			break;
+	} while (--count > 0);
+	
+	if (CIRC_CNT(info->xmit.head,
+		     info->xmit.tail,
+		     SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
+		rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
+
+#ifdef SERIAL_DEBUG_INTR
+	printk("THRE...");
+#endif
+	if (intr_done)
+		*intr_done = 0;
+
+	if (info->xmit.head == info->xmit.tail) {
+		info->IER &= ~UART_IER_THRI;
+		serial_out(info, UART_IER, info->IER);
+	}
+}
+
+static _INLINE_ void check_modem_status(struct async_struct *info)
+{
+	int	status;
+	struct	async_icount *icount;
+	
+	status = serial_in(info, UART_MSR);
+
+	if (status & UART_MSR_ANY_DELTA) {
+		icount = &info->state->icount;
+		/* update input line counters */
+		if (status & UART_MSR_TERI)
+			icount->rng++;
+		if (status & UART_MSR_DDSR)
+			icount->dsr++;
+		if (status & UART_MSR_DDCD) {
+			icount->dcd++;
+#ifdef CONFIG_HARD_PPS
+			if ((info->flags & ASYNC_HARDPPS_CD) &&
+			    (status & UART_MSR_DCD))
+				hardpps();
+#endif
+		}
+		if (status & UART_MSR_DCTS)
+			icount->cts++;
+		wake_up_interruptible(&info->delta_msr_wait);
+	}
+
+	if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
+#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
+		printk("ttys%d CD now %s...", info->line,
+		       (status & UART_MSR_DCD) ? "on" : "off");
+#endif		
+		if (status & UART_MSR_DCD)
+			wake_up_interruptible(&info->open_wait);
+		else if (!((info->flags & ASYNC_CALLOUT_ACTIVE) &&
+			   (info->flags & ASYNC_CALLOUT_NOHUP))) {
+#ifdef SERIAL_DEBUG_OPEN
+			printk("doing serial hangup...");
+#endif
+			if (info->tty)
+				tty_hangup(info->tty);
+		}
+	}
+	if (info->flags & ASYNC_CTS_FLOW) {
+		if (info->tty->hw_stopped) {
+			if (status & UART_MSR_CTS) {
+#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
+				printk("CTS tx start...");
+#endif
+				info->tty->hw_stopped = 0;
+				info->IER |= UART_IER_THRI;
+				serial_out(info, UART_IER, info->IER);
+				rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
+				return;
+			}
+		} else {
+			if (!(status & UART_MSR_CTS)) {
+#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
+				printk("CTS tx stop...");
+#endif
+				info->tty->hw_stopped = 1;
+				info->IER &= ~UART_IER_THRI;
+				serial_out(info, UART_IER, info->IER);
+			}
+		}
+	}
+}
+
+
+
+/*
+ * This is the serial driver's interrupt routine for a single port
+ */
+static void rs_interrupt_single(int irq, void *dev_id, struct pt_regs * regs)
+{
+	int status;
+	int pass_counter = 0;
+	struct async_struct * info;
+	
+#ifdef SERIAL_DEBUG_INTR
+	printk("rs_interrupt_single(%d)...", irq);
+#endif
+
+	info = IRQ_ports[irq];
+	if (!info || !info->tty)
+		return;
+
+	do {
+		status = serial_inp(info, UART_LSR);
+#ifdef SERIAL_DEBUG_INTR
+		printk("status = %x...", status);
+#endif
+		if (status & UART_LSR_DR)
+			receive_chars(info, &status, regs);
+		check_modem_status(info);
+		if (status & UART_LSR_THRE)
+			transmit_chars(info, 0);
+		if (pass_counter++ > RS_ISR_PASS_LIMIT) {
+#if 0
+			printk("rs_single loop break.\n");
+#endif
+			break;
+		}
+	} while (!(serial_in(info, UART_IIR) & UART_IIR_NO_INT));
+	info->last_active = jiffies;
+#ifdef SERIAL_DEBUG_INTR
+	printk("end.\n");
+#endif
+}
+
+
+/*
+ * -------------------------------------------------------------------
+ * Here ends the serial interrupt routines.
+ * -------------------------------------------------------------------
+ */
+
+/*
+ * This routine is used to handle the "bottom half" processing for the
+ * serial driver, known also the "software interrupt" processing.
+ * This processing is done at the kernel interrupt level, after the
+ * rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
+ * is where time-consuming activities which can not be done in the
+ * interrupt driver proper are done; the interrupt driver schedules
+ * them using rs_sched_event(), and they get done here.
+ */
+static void do_serial_bh(void)
+{
+	run_task_queue(&tq_serial);
+}
+
+static void do_softint(void *private_)
+{
+	struct async_struct	*info = (struct async_struct *) private_;
+	struct tty_struct	*tty;
+	
+	tty = info->tty;
+	if (!tty)
+		return;
+
+	if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
+		if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+		    tty->ldisc.write_wakeup)
+			(tty->ldisc.write_wakeup)(tty);
+		wake_up_interruptible(&tty->write_wait);
+#ifdef SERIAL_HAVE_POLL_WAIT
+		wake_up_interruptible(&tty->poll_wait);
+#endif
+	}
+}
+
+/*
+ * This subroutine is called when the RS_TIMER goes off.  It is used
+ * by the serial driver to handle ports that do not have an interrupt
+ * (irq=0).  This doesn't work very well for 16450's, but gives barely
+ * passable results for a 16550A.  (Although at the expense of much
+ * CPU overhead).
+ */
+static void rs_timer(unsigned long dummy)
+{
+	static unsigned long last_strobe;
+	struct async_struct *info;
+	unsigned int	i;
+	unsigned long flags;
+
+	if ((jiffies - last_strobe) >= RS_STROBE_TIME) {
+		for (i=0; i < NR_IRQS; i++) {
+			info = IRQ_ports[i];
+			if (!info)
+				continue;
+			save_flags(flags); cli();
+				rs_interrupt_single(i, NULL, NULL);
+			restore_flags(flags);
+		}
+	}
+	last_strobe = jiffies;
+	mod_timer(&serial_timer, jiffies + RS_STROBE_TIME);
+
+#if 0
+	if (IRQ_ports[0]) {
+		save_flags(flags); cli();
+		rs_interrupt_single(0, NULL, NULL);
+		restore_flags(flags);
+
+		mod_timer(&serial_timer, jiffies + IRQ_timeout[0]);
+	}
+#endif
+}
+
+/*
+ * ---------------------------------------------------------------
+ * Low level utility subroutines for the serial driver:  routines to
+ * figure out the appropriate timeout for an interrupt chain, routines
+ * to initialize and startup a serial port, and routines to shutdown a
+ * serial port.  Useful stuff like that.
+ * ---------------------------------------------------------------
+ */
+
+/*
+ * This routine figures out the correct timeout for a particular IRQ.
+ * It uses the smallest timeout of all of the serial ports in a
+ * particular interrupt chain.  Now only used for IRQ 0....
+ */
+static void figure_IRQ_timeout(int irq)
+{
+	struct	async_struct	*info;
+	int	timeout = 60*HZ;	/* 60 seconds === a long time :-) */
+
+	info = IRQ_ports[irq];
+	if (!info) {
+		IRQ_timeout[irq] = 60*HZ;
+		return;
+	}
+	while (info) {
+		if (info->timeout < timeout)
+			timeout = info->timeout;
+		info = info->next_port;
+	}
+	if (!irq)
+		timeout = timeout / 2;
+	IRQ_timeout[irq] = (timeout > 3) ? timeout-2 : 1;
+}
+
+
+static int startup(struct async_struct * info)
+{
+	unsigned long flags;
+	int	retval=0;
+	void (*handler)(int, void *, struct pt_regs *);
+	struct serial_state *state= info->state;
+	unsigned long page;
+
+	page = get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		return -ENOMEM;
+
+	save_flags(flags); cli();
+
+	if (info->flags & ASYNC_INITIALIZED) {
+		free_page(page);
+		goto errout;
+	}
+
+	if (!CONFIGURED_SERIAL_PORT(state) || !state->type) {
+		if (info->tty)
+			set_bit(TTY_IO_ERROR, &info->tty->flags);
+		free_page(page);
+		goto errout;
+	}
+	if (info->xmit.buf)
+		free_page(page);
+	else
+		info->xmit.buf = (unsigned char *) page;
+
+
+	if (inl(UART_MOD_CNTRL + state->port) != 0x3) {
+		outl(3, UART_MOD_CNTRL + state->port);
+	}
+#ifdef SERIAL_DEBUG_OPEN
+	printk("starting up ttys%d (irq %d)...", info->line, state->irq);
+#endif
+
+
+	/*
+	 * Clear the FIFO buffers and disable them
+	 * (they will be reenabled in change_speed())
+	 */
+	if (uart_config[state->type].flags & UART_CLEAR_FIFO) {
+		serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);
+		serial_outp(info, UART_FCR, (UART_FCR_ENABLE_FIFO |
+					     UART_FCR_CLEAR_RCVR |
+					     UART_FCR_CLEAR_XMIT));
+		serial_outp(info, UART_FCR, 0);
+	}
+
+	/*
+	 * Clear the interrupt registers.
+	 */
+	(void) serial_inp(info, UART_LSR);
+	(void) serial_inp(info, UART_RX);
+	(void) serial_inp(info, UART_IIR);
+	(void) serial_inp(info, UART_MSR);
+
+	/*
+	 * At this point there's no way the LSR could still be 0xFF;
+	 * if it is, then bail out, because there's likely no UART
+	 * here.
+	 */
+	if (!(info->flags & ASYNC_BUGGY_UART) &&
+	    (serial_inp(info, UART_LSR) == 0xff)) {
+		printk("LSR safety check engaged!\n");
+		if (capable(CAP_SYS_ADMIN)) {
+			if (info->tty)
+				set_bit(TTY_IO_ERROR, &info->tty->flags);
+		} else
+			retval = -ENODEV;
+		goto errout;
+	}
+	
+	/*
+	 * Allocate the IRQ if necessary
+	 */
+#if 0
+	/* au1000, uart0 irq is 0 */
+	if (state->irq && (!IRQ_ports[state->irq] || !IRQ_ports[state->irq]->next_port)) {
+#endif
+	if ((!IRQ_ports[state->irq] || !IRQ_ports[state->irq]->next_port)) {
+		if (IRQ_ports[state->irq]) {
+			retval = -EBUSY;
+			goto errout;
+		} else 
+			handler = rs_interrupt_single;
+
+		retval = request_irq(state->irq, handler, SA_SHIRQ,
+				     "serial", &IRQ_ports[state->irq]);
+		if (retval) {
+			if (capable(CAP_SYS_ADMIN)) {
+				if (info->tty)
+					set_bit(TTY_IO_ERROR,
+						&info->tty->flags);
+				retval = 0;
+			}
+			goto errout;
+		}
+	}
+
+	/*
+	 * Insert serial port into IRQ chain.
+	 */
+	info->prev_port = 0;
+	info->next_port = IRQ_ports[state->irq];
+	if (info->next_port)
+		info->next_port->prev_port = info;
+	IRQ_ports[state->irq] = info;
+	figure_IRQ_timeout(state->irq);
+
+	/*
+	 * Now, initialize the UART 
+	 */
+	serial_outp(info, UART_LCR, UART_LCR_WLEN8);
+
+	info->MCR = 0;
+	if (info->tty->termios->c_cflag & CBAUD)
+		info->MCR = UART_MCR_DTR | UART_MCR_RTS;
+	{
+		if (state->irq != 0)
+			info->MCR |= UART_MCR_OUT2;
+	}
+	info->MCR |= ALPHA_KLUDGE_MCR; 		/* Don't ask */
+	serial_outp(info, UART_MCR, info->MCR);
+	
+	/*
+	 * Finally, enable interrupts
+	 */
+	info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
+	serial_outp(info, UART_IER, info->IER);	/* enable interrupts */
+	
+
+	/*
+	 * And clear the interrupt registers again for luck.
+	 */
+	(void)serial_inp(info, UART_LSR);
+	(void)serial_inp(info, UART_RX);
+	(void)serial_inp(info, UART_IIR);
+	(void)serial_inp(info, UART_MSR);
+
+	if (info->tty)
+		clear_bit(TTY_IO_ERROR, &info->tty->flags);
+	info->xmit.head = info->xmit.tail = 0;
+
+	/*
+	 * Set up serial timers...
+	 */
+	mod_timer(&serial_timer, jiffies + 2*HZ/100);
+
+	/*
+	 * Set up the tty->alt_speed kludge
+	 */
+	if (info->tty) {
+		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+			info->tty->alt_speed = 57600;
+		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+			info->tty->alt_speed = 115200;
+		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+			info->tty->alt_speed = 230400;
+		if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+			info->tty->alt_speed = 460800;
+	}
+	
+	/*
+	 * and set the speed of the serial port
+	 */
+	change_speed(info, 0);
+
+	info->flags |= ASYNC_INITIALIZED;
+	restore_flags(flags);
+	return 0;
+	
+errout:
+	restore_flags(flags);
+	return retval;
+}
+
+/*
+ * This routine will shutdown a serial port; interrupts are disabled, and
+ * DTR is dropped if the hangup on close termio flag is on.
+ */
+static void shutdown(struct async_struct * info)
+{
+	unsigned long	flags;
+	struct serial_state *state;
+	int		retval;
+
+	if (!(info->flags & ASYNC_INITIALIZED))
+		return;
+
+	state = info->state;
+
+#ifdef SERIAL_DEBUG_OPEN
+	printk("Shutting down serial port %d (irq %d)....", info->line,
+	       state->irq);
+#endif
+	
+	save_flags(flags); cli(); /* Disable interrupts */
+
+	/*
+	 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
+	 * here so the queue might never be waken up
+	 */
+	wake_up_interruptible(&info->delta_msr_wait);
+	
+	/*
+	 * First unlink the serial port from the IRQ chain...
+	 */
+	if (info->next_port)
+		info->next_port->prev_port = info->prev_port;
+	if (info->prev_port)
+		info->prev_port->next_port = info->next_port;
+	else
+		IRQ_ports[state->irq] = info->next_port;
+	figure_IRQ_timeout(state->irq);
+	
+	/*
+	 * Free the IRQ, if necessary
+	 */
+//	if (state->irq && (!IRQ_ports[state->irq] ||
+	if ((!IRQ_ports[state->irq] ||
+			  !IRQ_ports[state->irq]->next_port)) {
+		if (IRQ_ports[state->irq]) {
+			free_irq(state->irq, &IRQ_ports[state->irq]);
+			retval = request_irq(state->irq, rs_interrupt_single,
+					     SA_SHIRQ, "serial",
+					     &IRQ_ports[state->irq]);
+			
+			if (retval)
+				printk("serial shutdown: request_irq: error %d"
+				       "  Couldn't reacquire IRQ.\n", retval);
+		} else
+			free_irq(state->irq, &IRQ_ports[state->irq]);
+	}
+
+	if (info->xmit.buf) {
+		unsigned long pg = (unsigned long) info->xmit.buf;
+		info->xmit.buf = 0;
+		free_page(pg);
+	}
+
+	info->IER = 0;
+	serial_outp(info, UART_IER, 0x00);	/* disable all intrs */
+		info->MCR &= ~UART_MCR_OUT2;
+	info->MCR |= ALPHA_KLUDGE_MCR; 		/* Don't ask */
+	
+	/* disable break condition */
+	serial_out(info, UART_LCR, serial_inp(info, UART_LCR) & ~UART_LCR_SBC);
+	
+	if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
+		info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
+	serial_outp(info, UART_MCR, info->MCR);
+
+	/* disable FIFO's */	
+	serial_outp(info, UART_FCR, (UART_FCR_ENABLE_FIFO |
+				     UART_FCR_CLEAR_RCVR |
+				     UART_FCR_CLEAR_XMIT));
+	serial_outp(info, UART_FCR, 0);
+
+	(void)serial_in(info, UART_RX);    /* read data port to reset things */
+	
+	if (info->tty)
+		set_bit(TTY_IO_ERROR, &info->tty->flags);
+
+	info->flags &= ~ASYNC_INITIALIZED;
+	restore_flags(flags);
+}
+
+
+/*
+ * This routine is called to set the UART divisor registers to match
+ * the specified baud rate for a serial port.
+ */
+static void change_speed(struct async_struct *info,
+			 struct termios *old_termios)
+{
+	int	quot = 0, baud_base, baud;
+	unsigned cflag, cval, fcr = 0;
+	int	bits;
+	unsigned long	flags;
+
+	if (!info->tty || !info->tty->termios)
+		return;
+	cflag = info->tty->termios->c_cflag;
+	if (!CONFIGURED_SERIAL_PORT(info))
+		return;
+
+	/* byte size and parity */
+	switch (cflag & CSIZE) {
+	      case CS5: cval = 0x00; bits = 7; break;
+	      case CS6: cval = 0x01; bits = 8; break;
+	      case CS7: cval = 0x02; bits = 9; break;
+	      case CS8: cval = 0x03; bits = 10; break;
+	      /* Never happens, but GCC is too dumb to figure it out */
+	      default:  cval = 0x00; bits = 7; break;
+	      }
+	if (cflag & CSTOPB) {
+		cval |= 0x04;
+		bits++;
+	}
+	if (cflag & PARENB) {
+		cval |= UART_LCR_PARITY;
+		bits++;
+	}
+	if (!(cflag & PARODD))
+		cval |= UART_LCR_EPAR;
+#ifdef CMSPAR
+	if (cflag & CMSPAR)
+		cval |= UART_LCR_SPAR;
+#endif
+
+	/* Determine divisor based on baud rate */
+	baud = tty_get_baud_rate(info->tty);
+	if (!baud) {
+		baud = 9600;	/* B0 transition handled in rs_set_termios */
+	}
+	baud_base = info->state->baud_base;
+	//if (baud == 38400 &&
+	if (((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)) {
+		quot = info->state->custom_divisor;
+	}
+	else {
+		if (baud == 134)
+			/* Special case since 134 is really 134.5 */
+			quot = (2*baud_base / 269);
+		else if (baud)
+			quot = baud_base / baud;
+	}
+	/* If the quotient is zero refuse the change */
+	if (!quot && old_termios) {
+		info->tty->termios->c_cflag &= ~CBAUD;
+		info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
+		baud = tty_get_baud_rate(info->tty);
+		if (!baud)
+			baud = 9600;
+		if (baud == 38400 &&
+		    ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
+			quot = info->state->custom_divisor;
+		else {
+			if (baud == 134)
+				/* Special case since 134 is really 134.5 */
+				quot = (2*baud_base / 269);
+			else if (baud)
+				quot = baud_base / baud;
+		}
+	}
+	/* As a last resort, if the quotient is zero, default to 9600 bps */
+	if (!quot)
+		quot = baud_base / 9600;
+	
+	info->quot = quot;
+	info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base);
+	info->timeout += HZ/50;		/* Add .02 seconds of slop */
+
+	/* Set up FIFO's */
+	if (uart_config[info->state->type].flags & UART_USE_FIFO) {
+		if ((info->state->baud_base / quot) < 2400)
+			fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIGGER_1;
+		else
+			fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIGGER_8;
+	}
+	
+	/* CTS flow control flag and modem status interrupts */
+	info->IER &= ~UART_IER_MSI;
+	if (info->flags & ASYNC_HARDPPS_CD)
+		info->IER |= UART_IER_MSI;
+	if (cflag & CRTSCTS) {
+		info->flags |= ASYNC_CTS_FLOW;
+		info->IER |= UART_IER_MSI;
+	} else
+		info->flags &= ~ASYNC_CTS_FLOW;
+	if (cflag & CLOCAL)
+		info->flags &= ~ASYNC_CHECK_CD;
+	else {
+		info->flags |= ASYNC_CHECK_CD;
+		info->IER |= UART_IER_MSI;
+	}
+	serial_out(info, UART_IER, info->IER);
+
+	/*
+	 * Set up parity check flag
+	 */
+#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
+
+	info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
+	if (I_INPCK(info->tty))
+		info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+	if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+		info->read_status_mask |= UART_LSR_BI;
+	
+	/*
+	 * Characters to ignore
+	 */
+	info->ignore_status_mask = 0;
+	if (I_IGNPAR(info->tty))
+		info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
+	if (I_IGNBRK(info->tty)) {
+		info->ignore_status_mask |= UART_LSR_BI;
+		/*
+		 * If we're ignore parity and break indicators, ignore 
+		 * overruns too.  (For real raw support).
+		 */
+		if (I_IGNPAR(info->tty))
+			info->ignore_status_mask |= UART_LSR_OE;
+	}
+	/*
+	 * !!! ignore all characters if CREAD is not set
+	 */
+	if ((cflag & CREAD) == 0)
+		info->ignore_status_mask |= UART_LSR_DR;
+	save_flags(flags); cli();
+
+	serial_outp(info, UART_CLK, quot & 0xffff);
+	serial_outp(info, UART_LCR, cval);
+	info->LCR = cval;				/* Save LCR */
+	restore_flags(flags);
+}
+
+static void rs_put_char(struct tty_struct *tty, unsigned char ch)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+
+	if (serial_paranoia_check(info, tty->device, "rs_put_char"))
+		return;
+
+	if (!tty || !info->xmit.buf)
+		return;
+
+	save_flags(flags); cli();
+	if (CIRC_SPACE(info->xmit.head,
+		       info->xmit.tail,
+		       SERIAL_XMIT_SIZE) == 0) {
+		restore_flags(flags);
+		return;
+	}
+
+	info->xmit.buf[info->xmit.head] = ch;
+	info->xmit.head = (info->xmit.head + 1) & (SERIAL_XMIT_SIZE-1);
+	restore_flags(flags);
+}
+
+static void rs_flush_chars(struct tty_struct *tty)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+				
+	if (serial_paranoia_check(info, tty->device, "rs_flush_chars"))
+		return;
+
+	if (info->xmit.head == info->xmit.tail
+	    || tty->stopped
+	    || tty->hw_stopped
+	    || !info->xmit.buf)
+		return;
+
+	save_flags(flags); cli();
+	info->IER |= UART_IER_THRI;
+	serial_out(info, UART_IER, info->IER);
+	restore_flags(flags);
+}
+
+static int rs_write(struct tty_struct * tty, int from_user,
+		    const unsigned char *buf, int count)
+{
+	int	c, ret = 0;
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+				
+	if (serial_paranoia_check(info, tty->device, "rs_write"))
+		return 0;
+
+	if (!tty || !info->xmit.buf || !tmp_buf)
+		return 0;
+
+	save_flags(flags);
+	if (from_user) {
+		down(&tmp_buf_sem);
+		while (1) {
+			int c1;
+			c = CIRC_SPACE_TO_END(info->xmit.head,
+					      info->xmit.tail,
+					      SERIAL_XMIT_SIZE);
+			if (count < c)
+				c = count;
+			if (c <= 0)
+				break;
+
+			c -= copy_from_user(tmp_buf, buf, c);
+			if (!c) {
+				if (!ret)
+					ret = -EFAULT;
+				break;
+			}
+			cli();
+			c1 = CIRC_SPACE_TO_END(info->xmit.head,
+					       info->xmit.tail,
+					       SERIAL_XMIT_SIZE);
+			if (c1 < c)
+				c = c1;
+			memcpy(info->xmit.buf + info->xmit.head, tmp_buf, c);
+			info->xmit.head = ((info->xmit.head + c) &
+					   (SERIAL_XMIT_SIZE-1));
+			restore_flags(flags);
+			buf += c;
+			count -= c;
+			ret += c;
+		}
+		up(&tmp_buf_sem);
+	} else {
+		cli();
+		while (1) {
+			c = CIRC_SPACE_TO_END(info->xmit.head,
+					      info->xmit.tail,
+					      SERIAL_XMIT_SIZE);
+			if (count < c)
+				c = count;
+			if (c <= 0) {
+				break;
+			}
+			memcpy(info->xmit.buf + info->xmit.head, buf, c);
+			info->xmit.head = ((info->xmit.head + c) &
+					   (SERIAL_XMIT_SIZE-1));
+			buf += c;
+			count -= c;
+			ret += c;
+		}
+		restore_flags(flags);
+	}
+	if (info->xmit.head != info->xmit.tail
+	    && !tty->stopped
+	    && !tty->hw_stopped
+	    && !(info->IER & UART_IER_THRI)) {
+		info->IER |= UART_IER_THRI;
+		serial_out(info, UART_IER, info->IER);
+	}
+	return ret;
+}
+
+static int rs_write_room(struct tty_struct *tty)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+
+	if (serial_paranoia_check(info, tty->device, "rs_write_room"))
+		return 0;
+	return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
+}
+
+static int rs_chars_in_buffer(struct tty_struct *tty)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+				
+	if (serial_paranoia_check(info, tty->device, "rs_chars_in_buffer"))
+		return 0;
+	return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
+}
+
+static void rs_flush_buffer(struct tty_struct *tty)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+	
+	if (serial_paranoia_check(info, tty->device, "rs_flush_buffer"))
+		return;
+	save_flags(flags); cli();
+	info->xmit.head = info->xmit.tail = 0;
+	restore_flags(flags);
+	wake_up_interruptible(&tty->write_wait);
+#ifdef SERIAL_HAVE_POLL_WAIT
+	wake_up_interruptible(&tty->poll_wait);
+#endif
+	if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+	    tty->ldisc.write_wakeup)
+		(tty->ldisc.write_wakeup)(tty);
+}
+
+/*
+ * This function is used to send a high-priority XON/XOFF character to
+ * the device
+ */
+static void rs_send_xchar(struct tty_struct *tty, char ch)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+
+	if (serial_paranoia_check(info, tty->device, "rs_send_char"))
+		return;
+
+	info->x_char = ch;
+	if (ch) {
+		/* Make sure transmit interrupts are on */
+		info->IER |= UART_IER_THRI;
+		serial_out(info, UART_IER, info->IER);
+	}
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_throttle()
+ * 
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled.
+ * ------------------------------------------------------------
+ */
+static void rs_throttle(struct tty_struct * tty)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+#ifdef SERIAL_DEBUG_THROTTLE
+	char	buf[64];
+	
+	printk("throttle %s: %d....\n", tty_name(tty, buf),
+	       tty->ldisc.chars_in_buffer(tty));
+#endif
+
+	if (serial_paranoia_check(info, tty->device, "rs_throttle"))
+		return;
+	
+	if (I_IXOFF(tty))
+		rs_send_xchar(tty, STOP_CHAR(tty));
+
+	if (tty->termios->c_cflag & CRTSCTS)
+		info->MCR &= ~UART_MCR_RTS;
+
+	save_flags(flags); cli();
+	serial_out(info, UART_MCR, info->MCR);
+	restore_flags(flags);
+}
+
+static void rs_unthrottle(struct tty_struct * tty)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+#ifdef SERIAL_DEBUG_THROTTLE
+	char	buf[64];
+	
+	printk("unthrottle %s: %d....\n", tty_name(tty, buf),
+	       tty->ldisc.chars_in_buffer(tty));
+#endif
+
+	if (serial_paranoia_check(info, tty->device, "rs_unthrottle"))
+		return;
+	
+	if (I_IXOFF(tty)) {
+		if (info->x_char)
+			info->x_char = 0;
+		else
+			rs_send_xchar(tty, START_CHAR(tty));
+	}
+	if (tty->termios->c_cflag & CRTSCTS)
+		info->MCR |= UART_MCR_RTS;
+	save_flags(flags); cli();
+	serial_out(info, UART_MCR, info->MCR);
+	restore_flags(flags);
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_ioctl() and friends
+ * ------------------------------------------------------------
+ */
+
+static int get_serial_info(struct async_struct * info,
+			   struct serial_struct * retinfo)
+{
+	struct serial_struct tmp;
+	struct serial_state *state = info->state;
+   
+	if (!retinfo)
+		return -EFAULT;
+	memset(&tmp, 0, sizeof(tmp));
+	tmp.type = state->type;
+	tmp.line = state->line;
+	tmp.port = state->port;
+	if (HIGH_BITS_OFFSET)
+		tmp.port_high = state->port >> HIGH_BITS_OFFSET;
+	else
+		tmp.port_high = 0;
+	tmp.irq = state->irq;
+	tmp.flags = state->flags;
+	tmp.xmit_fifo_size = state->xmit_fifo_size;
+	tmp.baud_base = state->baud_base;
+	tmp.close_delay = state->close_delay;
+	tmp.closing_wait = state->closing_wait;
+	tmp.custom_divisor = state->custom_divisor;
+	tmp.hub6 = state->hub6;
+	tmp.io_type = state->io_type;
+	if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
+		return -EFAULT;
+	return 0;
+}
+
+static int set_serial_info(struct async_struct * info,
+			   struct serial_struct * new_info)
+{
+	struct serial_struct new_serial;
+ 	struct serial_state old_state, *state;
+	unsigned int		i,change_irq,change_port;
+	int 			retval = 0;
+	unsigned long		new_port;
+
+	if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
+		return -EFAULT;
+	state = info->state;
+	old_state = *state;
+
+	new_port = new_serial.port;
+	if (HIGH_BITS_OFFSET)
+		new_port += (unsigned long) new_serial.port_high << HIGH_BITS_OFFSET;
+
+	change_irq = new_serial.irq != state->irq;
+	change_port = (new_port != ((int) state->port)) ||
+		(new_serial.hub6 != state->hub6);
+  
+	if (!capable(CAP_SYS_ADMIN)) {
+		if (change_irq || change_port ||
+		    (new_serial.baud_base != state->baud_base) ||
+		    (new_serial.type != state->type) ||
+		    (new_serial.close_delay != state->close_delay) ||
+		    (new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
+		    ((new_serial.flags & ~ASYNC_USR_MASK) !=
+		     (state->flags & ~ASYNC_USR_MASK)))
+			return -EPERM;
+		state->flags = ((state->flags & ~ASYNC_USR_MASK) |
+			       (new_serial.flags & ASYNC_USR_MASK));
+		info->flags = ((info->flags & ~ASYNC_USR_MASK) |
+			       (new_serial.flags & ASYNC_USR_MASK));
+		state->custom_divisor = new_serial.custom_divisor;
+		goto check_and_exit;
+	}
+
+	new_serial.irq = irq_cannonicalize(new_serial.irq);
+
+	if ((new_serial.irq >= NR_IRQS) || (new_serial.irq < 0) || 
+	    (new_serial.baud_base < 9600)|| (new_serial.type < PORT_UNKNOWN) ||
+	    (new_serial.type > PORT_MAX) || (new_serial.type == PORT_CIRRUS) ||
+	    (new_serial.type == PORT_STARTECH)) {
+		return -EINVAL;
+	}
+
+	if ((new_serial.type != state->type) ||
+	    (new_serial.xmit_fifo_size <= 0))
+		new_serial.xmit_fifo_size =
+			uart_config[new_serial.type].dfl_xmit_fifo_size;
+
+	/* Make sure address is not already in use */
+	if (new_serial.type) {
+		for (i = 0 ; i < NR_PORTS; i++)
+			if ((state != &rs_table[i]) &&
+			    (rs_table[i].port == new_port) &&
+			    rs_table[i].type)
+				return -EADDRINUSE;
+	}
+
+	if ((change_port || change_irq) && (state->count > 1))
+		return -EBUSY;
+
+	/*
+	 * OK, past this point, all the error checking has been done.
+	 * At this point, we start making changes.....
+	 */
+
+	state->baud_base = new_serial.baud_base;
+	state->flags = ((state->flags & ~ASYNC_FLAGS) |
+			(new_serial.flags & ASYNC_FLAGS));
+	info->flags = ((state->flags & ~ASYNC_INTERNAL_FLAGS) |
+		       (info->flags & ASYNC_INTERNAL_FLAGS));
+	state->custom_divisor = new_serial.custom_divisor;
+	state->close_delay = new_serial.close_delay * HZ/100;
+	state->closing_wait = new_serial.closing_wait * HZ/100;
+	info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+	info->xmit_fifo_size = state->xmit_fifo_size =
+		new_serial.xmit_fifo_size;
+
+	if ((state->type != PORT_UNKNOWN) && state->port) {
+		release_region(state->port,8);
+	}
+	state->type = new_serial.type;
+	if (change_port || change_irq) {
+		/*
+		 * We need to shutdown the serial port at the old
+		 * port/irq combination.
+		 */
+		shutdown(info);
+		state->irq = new_serial.irq;
+		info->port = state->port = new_port;
+		info->hub6 = state->hub6 = new_serial.hub6;
+		if (info->hub6)
+			info->io_type = state->io_type = SERIAL_IO_HUB6;
+		else if (info->io_type == SERIAL_IO_HUB6)
+			info->io_type = state->io_type = SERIAL_IO_PORT;
+	}
+	if ((state->type != PORT_UNKNOWN) && state->port) {
+			request_region(state->port,8,"serial(set)");
+	}
+
+	
+check_and_exit:
+	if (!state->port || !state->type)
+		return 0;
+	if (info->flags & ASYNC_INITIALIZED) {
+		if (((old_state.flags & ASYNC_SPD_MASK) !=
+		     (state->flags & ASYNC_SPD_MASK)) ||
+		    (old_state.custom_divisor != state->custom_divisor)) {
+			if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+				info->tty->alt_speed = 57600;
+			if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+				info->tty->alt_speed = 115200;
+			if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+				info->tty->alt_speed = 230400;
+			if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+				info->tty->alt_speed = 460800;
+			change_speed(info, 0);
+		}
+	} else {
+		retval = startup(info);
+	}
+	return retval;
+}
+
+
+/*
+ * get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ * 	    is emptied.  On bus types like RS485, the transmitter must
+ * 	    release the bus after transmitting. This must be done when
+ * 	    the transmit shift register is empty, not be done when the
+ * 	    transmit holding register is empty.  This functionality
+ * 	    allows an RS485 driver to be written in user space. 
+ */
+static int get_lsr_info(struct async_struct * info, unsigned int *value)
+{
+	unsigned char status;
+	unsigned int result;
+	unsigned long flags;
+
+	save_flags(flags); cli();
+	status = serial_in(info, UART_LSR);
+	restore_flags(flags);
+	result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
+
+	/*
+	 * If we're about to load something into the transmit
+	 * register, we'll pretend the transmitter isn't empty to
+	 * avoid a race condition (depending on when the transmit
+	 * interrupt happens).
+	 */
+	if (info->x_char || 
+	    ((CIRC_CNT(info->xmit.head, info->xmit.tail,
+		       SERIAL_XMIT_SIZE) > 0) &&
+	     !info->tty->stopped && !info->tty->hw_stopped))
+		result &= TIOCSER_TEMT;
+
+	if (copy_to_user(value, &result, sizeof(int)))
+		return -EFAULT;
+	return 0;
+}
+
+
+static int get_modem_info(struct async_struct * info, unsigned int *value)
+{
+	unsigned char control, status;
+	unsigned int result;
+	unsigned long flags;
+
+	control = info->MCR;
+	save_flags(flags); cli();
+	status = serial_in(info, UART_MSR);
+	restore_flags(flags);
+	result =  ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
+		| ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
+#ifdef TIOCM_OUT1
+		| ((control & UART_MCR_OUT1) ? TIOCM_OUT1 : 0)
+		| ((control & UART_MCR_OUT2) ? TIOCM_OUT2 : 0)
+#endif
+		| ((status  & UART_MSR_DCD) ? TIOCM_CAR : 0)
+		| ((status  & UART_MSR_RI) ? TIOCM_RNG : 0)
+		| ((status  & UART_MSR_DSR) ? TIOCM_DSR : 0)
+		| ((status  & UART_MSR_CTS) ? TIOCM_CTS : 0);
+
+	if (copy_to_user(value, &result, sizeof(int)))
+		return -EFAULT;
+	return 0;
+}
+
+static int set_modem_info(struct async_struct * info, unsigned int cmd,
+			  unsigned int *value)
+{
+	unsigned int arg;
+	unsigned long flags;
+
+	if (copy_from_user(&arg, value, sizeof(int)))
+		return -EFAULT;
+
+	switch (cmd) {
+	case TIOCMBIS: 
+		if (arg & TIOCM_RTS)
+			info->MCR |= UART_MCR_RTS;
+		if (arg & TIOCM_DTR)
+			info->MCR |= UART_MCR_DTR;
+#ifdef TIOCM_OUT1
+		if (arg & TIOCM_OUT1)
+			info->MCR |= UART_MCR_OUT1;
+		if (arg & TIOCM_OUT2)
+			info->MCR |= UART_MCR_OUT2;
+#endif
+		if (arg & TIOCM_LOOP)
+			info->MCR |= UART_MCR_LOOP;
+		break;
+	case TIOCMBIC:
+		if (arg & TIOCM_RTS)
+			info->MCR &= ~UART_MCR_RTS;
+		if (arg & TIOCM_DTR)
+			info->MCR &= ~UART_MCR_DTR;
+#ifdef TIOCM_OUT1
+		if (arg & TIOCM_OUT1)
+			info->MCR &= ~UART_MCR_OUT1;
+		if (arg & TIOCM_OUT2)
+			info->MCR &= ~UART_MCR_OUT2;
+#endif
+		if (arg & TIOCM_LOOP)
+			info->MCR &= ~UART_MCR_LOOP;
+		break;
+	case TIOCMSET:
+		info->MCR = ((info->MCR & ~(UART_MCR_RTS |
+#ifdef TIOCM_OUT1
+					    UART_MCR_OUT1 |
+					    UART_MCR_OUT2 |
+#endif
+					    UART_MCR_LOOP |
+					    UART_MCR_DTR))
+			     | ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0)
+#ifdef TIOCM_OUT1
+			     | ((arg & TIOCM_OUT1) ? UART_MCR_OUT1 : 0)
+			     | ((arg & TIOCM_OUT2) ? UART_MCR_OUT2 : 0)
+#endif
+			     | ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0)
+			     | ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0));
+		break;
+	default:
+		return -EINVAL;
+	}
+	save_flags(flags); cli();
+	info->MCR |= ALPHA_KLUDGE_MCR; 		/* Don't ask */
+	serial_out(info, UART_MCR, info->MCR);
+	restore_flags(flags);
+	return 0;
+}
+
+static int do_autoconfig(struct async_struct * info)
+{
+	int retval;
+	
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+	
+	if (info->state->count > 1)
+		return -EBUSY;
+	
+	shutdown(info);
+
+	autoconfig(info->state);
+	retval = startup(info);
+	if (retval)
+		return retval;
+	return 0;
+}
+
+/*
+ * rs_break() --- routine which turns the break handling on or off
+ */
+static void rs_break(struct tty_struct *tty, int break_state)
+{
+	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+	
+	if (serial_paranoia_check(info, tty->device, "rs_break"))
+		return;
+
+	if (!CONFIGURED_SERIAL_PORT(info))
+		return;
+	save_flags(flags); cli();
+	if (break_state == -1)
+		info->LCR |= UART_LCR_SBC;
+	else
+		info->LCR &= ~UART_LCR_SBC;
+	serial_out(info, UART_LCR, info->LCR);
+	restore_flags(flags);
+}
+
+
+static int rs_ioctl(struct tty_struct *tty, struct file * file,
+		    unsigned int cmd, unsigned long arg)
+{
+	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct async_icount cprev, cnow;	/* kernel counter temps */
+	struct serial_icounter_struct icount;
+	unsigned long flags;
+	
+	if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
+		return -ENODEV;
+
+	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
+	    (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
+	    (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+		if (tty->flags & (1 << TTY_IO_ERROR))
+		    return -EIO;
+	}
+	
+	switch (cmd) {
+		case TIOCMGET:
+			return get_modem_info(info, (unsigned int *) arg);
+		case TIOCMBIS:
+		case TIOCMBIC:
+		case TIOCMSET:
+			return set_modem_info(info, cmd, (unsigned int *) arg);
+		case TIOCGSERIAL:
+			return get_serial_info(info,
+					       (struct serial_struct *) arg);
+		case TIOCSSERIAL:
+			return set_serial_info(info,
+					       (struct serial_struct *) arg);
+		case TIOCSERCONFIG:
+			return do_autoconfig(info);
+
+		case TIOCSERGETLSR: /* Get line status register */
+			return get_lsr_info(info, (unsigned int *) arg);
+
+		case TIOCSERGSTRUCT:
+			if (copy_to_user((struct async_struct *) arg,
+					 info, sizeof(struct async_struct)))
+				return -EFAULT;
+			return 0;
+				
+			
+		/*
+		 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
+		 * - mask passed in arg for lines of interest
+ 		 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
+		 * Caller should use TIOCGICOUNT to see which one it was
+		 */
+		case TIOCMIWAIT:
+			save_flags(flags); cli();
+			/* note the counters on entry */
+			cprev = info->state->icount;
+			restore_flags(flags);
+			/* Force modem status interrupts on */
+			info->IER |= UART_IER_MSI;
+			serial_out(info, UART_IER, info->IER);
+			while (1) {
+				interruptible_sleep_on(&info->delta_msr_wait);
+				/* see if a signal did it */
+				if (signal_pending(current))
+					return -ERESTARTSYS;
+				save_flags(flags); cli();
+				cnow = info->state->icount; /* atomic copy */
+				restore_flags(flags);
+				if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 
+				    cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
+					return -EIO; /* no change => error */
+				if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+				     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+				     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
+				     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
+					return 0;
+				}
+				cprev = cnow;
+			}
+			/* NOTREACHED */
+
+		/* 
+		 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+		 * Return: write counters to the user passed counter struct
+		 * NB: both 1->0 and 0->1 transitions are counted except for
+		 *     RI where only 0->1 is counted.
+		 */
+		case TIOCGICOUNT:
+			save_flags(flags); cli();
+			cnow = info->state->icount;
+			restore_flags(flags);
+			icount.cts = cnow.cts;
+			icount.dsr = cnow.dsr;
+			icount.rng = cnow.rng;
+			icount.dcd = cnow.dcd;
+			icount.rx = cnow.rx;
+			icount.tx = cnow.tx;
+			icount.frame = cnow.frame;
+			icount.overrun = cnow.overrun;
+			icount.parity = cnow.parity;
+			icount.brk = cnow.brk;
+			icount.buf_overrun = cnow.buf_overrun;
+			
+			if (copy_to_user((void *)arg, &icount, sizeof(icount)))
+				return -EFAULT;
+			return 0;
+		case TIOCSERGWILD:
+		case TIOCSERSWILD:
+			/* "setserial -W" is called in Debian boot */
+			printk ("TIOCSER?WILD ioctl obsolete, ignored.\n");
+			return 0;
+
+		default:
+			return -ENOIOCTLCMD;
+		}
+	return 0;
+}
+
+static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{
+	struct async_struct *info = (struct async_struct *)tty->driver_data;
+	unsigned long flags;
+	unsigned int cflag = tty->termios->c_cflag;
+	
+	if (   (cflag == old_termios->c_cflag)
+	    && (   RELEVANT_IFLAG(tty->termios->c_iflag) 
+		== RELEVANT_IFLAG(old_termios->c_iflag)))
+	  return;
+
+	change_speed(info, old_termios);
+
+	/* Handle transition to B0 status */
+	if ((old_termios->c_cflag & CBAUD) &&
+	    !(cflag & CBAUD)) {
+		info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
+		save_flags(flags); cli();
+		serial_out(info, UART_MCR, info->MCR);
+		restore_flags(flags);
+	}
+	
+	/* Handle transition away from B0 status */
+	if (!(old_termios->c_cflag & CBAUD) &&
+	    (cflag & CBAUD)) {
+		info->MCR |= UART_MCR_DTR;
+		if (!(tty->termios->c_cflag & CRTSCTS) || 
+		    !test_bit(TTY_THROTTLED, &tty->flags)) {
+			info->MCR |= UART_MCR_RTS;
+		}
+		save_flags(flags); cli();
+		serial_out(info, UART_MCR, info->MCR);
+		restore_flags(flags);
+	}
+	
+	/* Handle turning off CRTSCTS */
+	if ((old_termios->c_cflag & CRTSCTS) &&
+	    !(tty->termios->c_cflag & CRTSCTS)) {
+		tty->hw_stopped = 0;
+		rs_start(tty);
+	}
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_close()
+ * 
+ * This routine is called when the serial port gets closed.  First, we
+ * wait for the last remaining data to be sent.  Then, we unlink its
+ * async structure from the interrupt chain if necessary, and we free
+ * that IRQ if nothing is left in the chain.
+ * ------------------------------------------------------------
+ */
+static void rs_close(struct tty_struct *tty, struct file * filp)
+{
+	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct serial_state *state;
+	unsigned long flags;
+
+	if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
+		return;
+
+	state = info->state;
+	
+	save_flags(flags); cli();
+	
+	if (tty_hung_up_p(filp)) {
+		DBG_CNT("before DEC-hung");
+		MOD_DEC_USE_COUNT;
+		restore_flags(flags);
+		return;
+	}
+	
+#ifdef SERIAL_DEBUG_OPEN
+	printk("rs_close ttys%d, count = %d\n", info->line, state->count);
+#endif
+	if ((tty->count == 1) && (state->count != 1)) {
+		/*
+		 * Uh, oh.  tty->count is 1, which means that the tty
+		 * structure will be freed.  state->count should always
+		 * be one in these conditions.  If it's greater than
+		 * one, we've got real problems, since it means the
+		 * serial port won't be shutdown.
+		 */
+		printk("rs_close: bad serial port count; tty->count is 1, "
+		       "state->count is %d\n", state->count);
+		state->count = 1;
+	}
+	if (--state->count < 0) {
+		printk("rs_close: bad serial port count for ttys%d: %d\n",
+		       info->line, state->count);
+		state->count = 0;
+	}
+	if (state->count) {
+		DBG_CNT("before DEC-2");
+		MOD_DEC_USE_COUNT;
+		restore_flags(flags);
+		return;
+	}
+	info->flags |= ASYNC_CLOSING;
+	restore_flags(flags);
+	/*
+	 * Save the termios structure, since this port may have
+	 * separate termios for callout and dialin.
+	 */
+	if (info->flags & ASYNC_NORMAL_ACTIVE)
+		info->state->normal_termios = *tty->termios;
+	if (info->flags & ASYNC_CALLOUT_ACTIVE)
+		info->state->callout_termios = *tty->termios;
+	/*
+	 * Now we wait for the transmit buffer to clear; and we notify 
+	 * the line discipline to only process XON/XOFF characters.
+	 */
+	tty->closing = 1;
+	if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+		tty_wait_until_sent(tty, info->closing_wait);
+	/*
+	 * At this point we stop accepting input.  To do this, we
+	 * disable the receive line status interrupts, and tell the
+	 * interrupt driver to stop checking the data ready bit in the
+	 * line status register.
+	 */
+	info->IER &= ~UART_IER_RLSI;
+	info->read_status_mask &= ~UART_LSR_DR;
+	if (info->flags & ASYNC_INITIALIZED) {
+		serial_out(info, UART_IER, info->IER);
+		/*
+		 * Before we drop DTR, make sure the UART transmitter
+		 * has completely drained; this is especially
+		 * important if there is a transmit FIFO!
+		 */
+		rs_wait_until_sent(tty, info->timeout);
+	}
+	shutdown(info);
+	if (tty->driver.flush_buffer)
+		tty->driver.flush_buffer(tty);
+	if (tty->ldisc.flush_buffer)
+		tty->ldisc.flush_buffer(tty);
+	tty->closing = 0;
+	info->event = 0;
+	info->tty = 0;
+	if (info->blocked_open) {
+		if (info->close_delay) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			schedule_timeout(info->close_delay);
+		}
+		wake_up_interruptible(&info->open_wait);
+	}
+	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
+			 ASYNC_CLOSING);
+	wake_up_interruptible(&info->close_wait);
+	MOD_DEC_USE_COUNT;
+}
+
+/*
+ * rs_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	unsigned long orig_jiffies, char_time;
+	int lsr;
+	
+	if (serial_paranoia_check(info, tty->device, "rs_wait_until_sent"))
+		return;
+
+	if (info->state->type == PORT_UNKNOWN)
+		return;
+
+	if (info->xmit_fifo_size == 0)
+		return; /* Just in case.... */
+
+	orig_jiffies = jiffies;
+	/*
+	 * Set the check interval to be 1/5 of the estimated time to
+	 * send a single character, and make it at least 1.  The check
+	 * interval should also be less than the timeout.
+	 * 
+	 * Note: we have to use pretty tight timings here to satisfy
+	 * the NIST-PCTS.
+	 */
+	char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
+	char_time = char_time / 5;
+	if (char_time == 0)
+		char_time = 1;
+	if (timeout && timeout < char_time)
+		char_time = timeout;
+	/*
+	 * If the transmitter hasn't cleared in twice the approximate
+	 * amount of time to send the entire FIFO, it probably won't
+	 * ever clear.  This assumes the UART isn't doing flow
+	 * control, which is currently the case.  Hence, if it ever
+	 * takes longer than info->timeout, this is probably due to a
+	 * UART bug of some kind.  So, we clamp the timeout parameter at
+	 * 2*info->timeout.
+	 */
+	if (!timeout || timeout > 2*info->timeout)
+		timeout = 2*info->timeout;
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+	printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
+	printk("jiff=%lu...", jiffies);
+#endif
+	while (!((lsr = serial_inp(info, UART_LSR)) & UART_LSR_TEMT)) {
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+		printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
+#endif
+		set_current_state(TASK_INTERRUPTIBLE);
+		schedule_timeout(char_time);
+		if (signal_pending(current))
+			break;
+		if (timeout && time_after(jiffies, orig_jiffies + timeout))
+			break;
+	}
+	set_current_state(TASK_RUNNING);
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+	printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
+#endif
+}
+
+/*
+ * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void rs_hangup(struct tty_struct *tty)
+{
+	struct async_struct * info = (struct async_struct *)tty->driver_data;
+	struct serial_state *state = info->state;
+	
+	if (serial_paranoia_check(info, tty->device, "rs_hangup"))
+		return;
+
+	state = info->state;
+	
+	rs_flush_buffer(tty);
+	if (info->flags & ASYNC_CLOSING)
+		return;
+	shutdown(info);
+	info->event = 0;
+	state->count = 0;
+	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
+	info->tty = 0;
+	wake_up_interruptible(&info->open_wait);
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_open() and friends
+ * ------------------------------------------------------------
+ */
+static int block_til_ready(struct tty_struct *tty, struct file * filp,
+			   struct async_struct *info)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	struct serial_state *state = info->state;
+	int		retval;
+	int		do_clocal = 0, extra_count = 0;
+	unsigned long	flags;
+
+	/*
+	 * If the device is in the middle of being closed, then block
+	 * until it's done, and then try again.
+	 */
+	if (tty_hung_up_p(filp) ||
+	    (info->flags & ASYNC_CLOSING)) {
+		if (info->flags & ASYNC_CLOSING)
+			interruptible_sleep_on(&info->close_wait);
+#ifdef SERIAL_DO_RESTART
+		return ((info->flags & ASYNC_HUP_NOTIFY) ?
+			-EAGAIN : -ERESTARTSYS);
+#else
+		return -EAGAIN;
+#endif
+	}
+
+	/*
+	 * If this is a callout device, then just make sure the normal
+	 * device isn't being used.
+	 */
+	if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
+		if (info->flags & ASYNC_NORMAL_ACTIVE)
+			return -EBUSY;
+		if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
+		    (info->flags & ASYNC_SESSION_LOCKOUT) &&
+		    (info->session != current->session))
+		    return -EBUSY;
+		if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
+		    (info->flags & ASYNC_PGRP_LOCKOUT) &&
+		    (info->pgrp != current->pgrp))
+		    return -EBUSY;
+		info->flags |= ASYNC_CALLOUT_ACTIVE;
+		return 0;
+	}
+	
+	/*
+	 * If non-blocking mode is set, or the port is not enabled,
+	 * then make the check up front and then exit.
+	 */
+	if ((filp->f_flags & O_NONBLOCK) ||
+	    (tty->flags & (1 << TTY_IO_ERROR))) {
+		if (info->flags & ASYNC_CALLOUT_ACTIVE)
+			return -EBUSY;
+		info->flags |= ASYNC_NORMAL_ACTIVE;
+		return 0;
+	}
+
+	if (info->flags & ASYNC_CALLOUT_ACTIVE) {
+		if (state->normal_termios.c_cflag & CLOCAL)
+			do_clocal = 1;
+	} else {
+		if (tty->termios->c_cflag & CLOCAL)
+			do_clocal = 1;
+	}
+	
+	/*
+	 * Block waiting for the carrier detect and the line to become
+	 * free (i.e., not in use by the callout).  While we are in
+	 * this loop, state->count is dropped by one, so that
+	 * rs_close() knows when to free things.  We restore it upon
+	 * exit, either normal or abnormal.
+	 */
+	retval = 0;
+	add_wait_queue(&info->open_wait, &wait);
+#ifdef SERIAL_DEBUG_OPEN
+	printk("block_til_ready before block: ttys%d, count = %d\n",
+	       state->line, state->count);
+#endif
+	save_flags(flags); cli();
+	if (!tty_hung_up_p(filp)) {
+		extra_count = 1;
+		state->count--;
+	}
+	restore_flags(flags);
+	info->blocked_open++;
+	while (1) {
+		save_flags(flags); cli();
+		if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
+		    (tty->termios->c_cflag & CBAUD))
+			serial_out(info, UART_MCR,
+				   serial_inp(info, UART_MCR) |
+				   (UART_MCR_DTR | UART_MCR_RTS));
+		restore_flags(flags);
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (tty_hung_up_p(filp) ||
+		    !(info->flags & ASYNC_INITIALIZED)) {
+#ifdef SERIAL_DO_RESTART
+			if (info->flags & ASYNC_HUP_NOTIFY)
+				retval = -EAGAIN;
+			else
+				retval = -ERESTARTSYS;	
+#else
+			retval = -EAGAIN;
+#endif
+			break;
+		}
+		if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
+		    !(info->flags & ASYNC_CLOSING) &&
+		    (do_clocal || (serial_in(info, UART_MSR) &
+				   UART_MSR_DCD)))
+			break;
+		if (signal_pending(current)) {
+			retval = -ERESTARTSYS;
+			break;
+		}
+#ifdef SERIAL_DEBUG_OPEN
+		printk("block_til_ready blocking: ttys%d, count = %d\n",
+		       info->line, state->count);
+#endif
+		schedule();
+	}
+	set_current_state(TASK_RUNNING);
+	remove_wait_queue(&info->open_wait, &wait);
+	if (extra_count)
+		state->count++;
+	info->blocked_open--;
+#ifdef SERIAL_DEBUG_OPEN
+	printk("block_til_ready after blocking: ttys%d, count = %d\n",
+	       info->line, state->count);
+#endif
+	if (retval)
+		return retval;
+	info->flags |= ASYNC_NORMAL_ACTIVE;
+	return 0;
+}
+
+static int get_async_struct(int line, struct async_struct **ret_info)
+{
+	struct async_struct *info;
+	struct serial_state *sstate;
+
+	sstate = rs_table + line;
+	sstate->count++;
+	if (sstate->info) {
+		*ret_info = sstate->info;
+		return 0;
+	}
+	info = kmalloc(sizeof(struct async_struct), GFP_KERNEL);
+	if (!info) {
+		sstate->count--;
+		return -ENOMEM;
+	}
+	memset(info, 0, sizeof(struct async_struct));
+	init_waitqueue_head(&info->open_wait);
+	init_waitqueue_head(&info->close_wait);
+	init_waitqueue_head(&info->delta_msr_wait);
+	info->magic = SERIAL_MAGIC;
+	info->port = sstate->port;
+	info->flags = sstate->flags;
+	info->io_type = sstate->io_type;
+	info->iomem_base = sstate->iomem_base;
+	info->iomem_reg_shift = sstate->iomem_reg_shift;
+	info->xmit_fifo_size = sstate->xmit_fifo_size;
+	info->line = line;
+	info->tqueue.routine = do_softint;
+	info->tqueue.data = info;
+	info->state = sstate;
+	if (sstate->info) {
+		kfree(info);
+		*ret_info = sstate->info;
+		return 0;
+	}
+	*ret_info = sstate->info = info;
+	return 0;
+}
+
+/*
+ * This routine is called whenever a serial port is opened.  It
+ * enables interrupts for a serial port, linking in its async structure into
+ * the IRQ chain.   It also performs the serial-specific
+ * initialization for the tty structure.
+ */
+static int rs_open(struct tty_struct *tty, struct file * filp)
+{
+	struct async_struct	*info;
+	int 			retval, line;
+	unsigned long		page;
+
+	MOD_INC_USE_COUNT;
+	line = MINOR(tty->device) - tty->driver.minor_start;
+	if ((line < 0) || (line >= NR_PORTS)) {
+		MOD_DEC_USE_COUNT;
+		return -ENODEV;
+	}
+	retval = get_async_struct(line, &info);
+	if (retval) {
+		MOD_DEC_USE_COUNT;
+		return retval;
+	}
+	tty->driver_data = info;
+	info->tty = tty;
+	if (serial_paranoia_check(info, tty->device, "rs_open")) {
+		MOD_DEC_USE_COUNT;		
+		return -ENODEV;
+	}
+
+#ifdef SERIAL_DEBUG_OPEN
+	printk("rs_open %s%d, count = %d\n", tty->driver.name, info->line,
+	       info->state->count);
+#endif
+	info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+
+	if (!tmp_buf) {
+		page = get_zeroed_page(GFP_KERNEL);
+		if (!page) {
+			MOD_DEC_USE_COUNT;
+			return -ENOMEM;
+		}
+		if (tmp_buf)
+			free_page(page);
+		else
+			tmp_buf = (unsigned char *) page;
+	}
+
+	/*
+	 * If the port is the middle of closing, bail out now
+	 */
+	if (tty_hung_up_p(filp) ||
+	    (info->flags & ASYNC_CLOSING)) {
+		if (info->flags & ASYNC_CLOSING)
+			interruptible_sleep_on(&info->close_wait);
+		MOD_DEC_USE_COUNT;
+#ifdef SERIAL_DO_RESTART
+		return ((info->flags & ASYNC_HUP_NOTIFY) ?
+			-EAGAIN : -ERESTARTSYS);
+#else
+		return -EAGAIN;
+#endif
+	}
+
+	/*
+	 * Start up serial port
+	 */
+	retval = startup(info);
+	if (retval) {
+		MOD_DEC_USE_COUNT;
+		return retval;
+	}
+
+	retval = block_til_ready(tty, filp, info);
+	if (retval) {
+#ifdef SERIAL_DEBUG_OPEN
+		printk("rs_open returning after block_til_ready with %d\n",
+		       retval);
+#endif
+		MOD_DEC_USE_COUNT;
+		return retval;
+	}
+
+	if ((info->state->count == 1) &&
+	    (info->flags & ASYNC_SPLIT_TERMIOS)) {
+		if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
+			*tty->termios = info->state->normal_termios;
+		else 
+			*tty->termios = info->state->callout_termios;
+		change_speed(info, 0);
+	}
+#ifdef CONFIG_AU1000_SERIAL_CONSOLE
+	if (sercons.cflag && sercons.index == line) {
+		tty->termios->c_cflag = sercons.cflag;
+		sercons.cflag = 0;
+		change_speed(info, 0);
+	}
+#endif
+	info->session = current->session;
+	info->pgrp = current->pgrp;
+
+#ifdef SERIAL_DEBUG_OPEN
+	printk("rs_open ttys%d successful...", info->line);
+#endif
+	return 0;
+}
+
+/*
+ * /proc fs routines....
+ */
+
+static inline int line_info(char *buf, struct serial_state *state)
+{
+	struct async_struct *info = state->info, scr_info;
+	char	stat_buf[30], control, status;
+	int	ret;
+	unsigned long flags;
+
+	ret = sprintf(buf, "%d: uart:%s port:%lX irq:%d",
+		      state->line, uart_config[state->type].name, 
+		      state->port, state->irq);
+
+	if (!state->port || (state->type == PORT_UNKNOWN)) {
+		ret += sprintf(buf+ret, "\n");
+		return ret;
+	}
+
+	/*
+	 * Figure out the current RS-232 lines
+	 */
+	if (!info) {
+		info = &scr_info;	/* This is just for serial_{in,out} */
+
+		info->magic = SERIAL_MAGIC;
+		info->port = state->port;
+		info->flags = state->flags;
+		info->quot = 0;
+		info->tty = 0;
+	}
+	save_flags(flags); cli();
+	status = serial_in(info, UART_MSR);
+	control = info != &scr_info ? info->MCR : serial_in(info, UART_MCR);
+	restore_flags(flags); 
+
+	stat_buf[0] = 0;
+	stat_buf[1] = 0;
+	if (control & UART_MCR_RTS)
+		strcat(stat_buf, "|RTS");
+	if (status & UART_MSR_CTS)
+		strcat(stat_buf, "|CTS");
+	if (control & UART_MCR_DTR)
+		strcat(stat_buf, "|DTR");
+	if (status & UART_MSR_DSR)
+		strcat(stat_buf, "|DSR");
+	if (status & UART_MSR_DCD)
+		strcat(stat_buf, "|CD");
+	if (status & UART_MSR_RI)
+		strcat(stat_buf, "|RI");
+
+	if (info->quot) {
+		ret += sprintf(buf+ret, " baud:%d",
+			       state->baud_base / info->quot);
+	}
+
+	ret += sprintf(buf+ret, " tx:%d rx:%d",
+		      state->icount.tx, state->icount.rx);
+
+	if (state->icount.frame)
+		ret += sprintf(buf+ret, " fe:%d", state->icount.frame);
+	
+	if (state->icount.parity)
+		ret += sprintf(buf+ret, " pe:%d", state->icount.parity);
+	
+	if (state->icount.brk)
+		ret += sprintf(buf+ret, " brk:%d", state->icount.brk);	
+
+	if (state->icount.overrun)
+		ret += sprintf(buf+ret, " oe:%d", state->icount.overrun);
+
+	/*
+	 * Last thing is the RS-232 status lines
+	 */
+	ret += sprintf(buf+ret, " %s\n", stat_buf+1);
+	return ret;
+}
+
+int rs_read_proc(char *page, char **start, off_t off, int count,
+		 int *eof, void *data)
+{
+	int i, len = 0, l;
+	off_t	begin = 0;
+
+	len += sprintf(page, "serinfo:1.0 driver:%s%s revision:%s\n",
+		       serial_version, LOCAL_VERSTRING, serial_revdate);
+	for (i = 0; i < NR_PORTS && len < 4000; i++) {
+		l = line_info(page + len, &rs_table[i]);
+		len += l;
+		if (len+begin > off+count)
+			goto done;
+		if (len+begin < off) {
+			begin += len;
+			len = 0;
+		}
+	}
+	*eof = 1;
+done:
+	if (off >= len+begin)
+		return 0;
+	*start = page + (off-begin);
+	return ((count < begin+len-off) ? count : begin+len-off);
+}
+
+/*
+ * ---------------------------------------------------------------------
+ * rs_init() and friends
+ *
+ * rs_init() is called at boot-time to initialize the serial driver.
+ * ---------------------------------------------------------------------
+ */
+
+/*
+ * This routine prints out the appropriate serial driver version
+ * number, and identifies which options were configured into this
+ * driver.
+ */
+static char serial_options[] __initdata =
+       " no serial options enabled\n";
+#undef SERIAL_OPT
+
+static _INLINE_ void show_serial_version(void)
+{
+ 	printk(KERN_INFO "%s version %s%s (%s) with%s", serial_name,
+	       serial_version, LOCAL_VERSTRING, serial_revdate,
+	       serial_options);
+}
+
+
+/*
+ * This routine is called by rs_init() to initialize a specific serial
+ * port.  It determines what type of UART chip this serial port is
+ * using: 8250, 16450, 16550, 16550A.  The important question is
+ * whether or not this UART is a 16550A or not, since this will
+ * determine whether or not we can use its FIFO features or not.
+ */
+static void autoconfig(struct serial_state * state)
+{
+	struct async_struct *info, scr_info;
+	unsigned long flags;
+
+
+#ifdef SERIAL_DEBUG_AUTOCONF
+	printk("Testing ttyS%d (0x%04lx, 0x%04x)...\n", state->line,
+	       state->port, (unsigned) state->iomem_base);
+#endif
+	
+	if (!CONFIGURED_SERIAL_PORT(state))
+		return;
+
+	if (inl(UART_MOD_CNTRL + state->port) != 0x3) {
+		outl(3, UART_MOD_CNTRL + state->port);
+	}
+		
+	state->type = PORT_16550;
+	info = &scr_info;	/* This is just for serial_{in,out} */
+
+	info->magic = SERIAL_MAGIC;
+	info->state = state;
+	info->port = state->port;
+	info->flags = state->flags;
+	info->io_type = state->io_type;
+	info->iomem_base = state->iomem_base;
+	info->iomem_reg_shift = state->iomem_reg_shift;
+
+
+	save_flags(flags); cli();
+	state->xmit_fifo_size =	uart_config[state->type].dfl_xmit_fifo_size;
+
+	if (info->port) {
+			request_region(info->port,8,"serial(auto)");
+	}
+
+	/*
+	 * Reset the UART.
+	 */
+	serial_outp(info, UART_FCR, (UART_FCR_ENABLE_FIFO |
+				     UART_FCR_CLEAR_RCVR |
+				     UART_FCR_CLEAR_XMIT));
+	serial_outp(info, UART_FCR, 0);
+	(void)serial_in(info, UART_RX);
+	serial_outp(info, UART_IER, 0);
+	
+	restore_flags(flags);
+}
+
+int register_serial(struct serial_struct *req);
+void unregister_serial(int line);
+
+EXPORT_SYMBOL(register_serial);
+EXPORT_SYMBOL(unregister_serial);
+
+
+/*
+ * The serial driver boot-time initialization code!
+ */
+static int __init rs_init(void)
+{
+	int i;
+	struct serial_state * state;
+
+	init_bh(SERIAL_BH, do_serial_bh);
+	init_timer(&serial_timer);
+	serial_timer.function = rs_timer;
+	mod_timer(&serial_timer, jiffies + RS_STROBE_TIME);
+
+	for (i = 0; i < NR_IRQS; i++) {
+		IRQ_ports[i] = 0;
+		IRQ_timeout[i] = 0;
+	}
+#ifdef CONFIG_AU1000_SERIAL_CONSOLE
+	/*
+	 *	The interrupt of the serial console port
+	 *	can't be shared.
+	 */
+	if (sercons.flags & CON_CONSDEV) {
+		for(i = 0; i < NR_PORTS; i++)
+			if (i != sercons.index &&
+			    rs_table[i].irq == rs_table[sercons.index].irq)
+				rs_table[i].irq = 0;
+	}
+#endif
+	show_serial_version();
+
+	/* Initialize the tty_driver structure */
+	
+	memset(&serial_driver, 0, sizeof(struct tty_driver));
+	serial_driver.magic = TTY_DRIVER_MAGIC;
+	serial_driver.driver_name = "serial";
+#if (LINUX_VERSION_CODE > 0x2032D && defined(CONFIG_DEVFS_FS))
+	serial_driver.name = "tts/%d";
+#else
+	serial_driver.name = "ttyS";
+#endif
+	serial_driver.major = TTY_MAJOR;
+	serial_driver.minor_start = 64 + SERIAL_DEV_OFFSET;
+	serial_driver.num = NR_PORTS;
+	serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
+	serial_driver.subtype = SERIAL_TYPE_NORMAL;
+	serial_driver.init_termios = tty_std_termios;
+	serial_driver.init_termios.c_cflag =
+		B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+	serial_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
+	serial_driver.refcount = &serial_refcount;
+	serial_driver.table = serial_table;
+	serial_driver.termios = serial_termios;
+	serial_driver.termios_locked = serial_termios_locked;
+
+	serial_driver.open = rs_open;
+	serial_driver.close = rs_close;
+	serial_driver.write = rs_write;
+	serial_driver.put_char = rs_put_char;
+	serial_driver.flush_chars = rs_flush_chars;
+	serial_driver.write_room = rs_write_room;
+	serial_driver.chars_in_buffer = rs_chars_in_buffer;
+	serial_driver.flush_buffer = rs_flush_buffer;
+	serial_driver.ioctl = rs_ioctl;
+	serial_driver.throttle = rs_throttle;
+	serial_driver.unthrottle = rs_unthrottle;
+	serial_driver.set_termios = rs_set_termios;
+	serial_driver.stop = rs_stop;
+	serial_driver.start = rs_start;
+	serial_driver.hangup = rs_hangup;
+	serial_driver.break_ctl = rs_break;
+	serial_driver.send_xchar = rs_send_xchar;
+	serial_driver.wait_until_sent = rs_wait_until_sent;
+	serial_driver.read_proc = rs_read_proc;
+	
+	/*
+	 * The callout device is just like normal device except for
+	 * major number and the subtype code.
+	 */
+	callout_driver = serial_driver;
+#if (LINUX_VERSION_CODE > 0x2032D && defined(CONFIG_DEVFS_FS))
+	callout_driver.name = "cua/%d";
+#else
+	callout_driver.name = "cua";
+#endif
+	callout_driver.major = TTYAUX_MAJOR;
+	callout_driver.subtype = SERIAL_TYPE_CALLOUT;
+	callout_driver.read_proc = 0;
+	callout_driver.proc_entry = 0;
+
+	if (tty_register_driver(&serial_driver))
+		panic("Couldn't register serial driver\n");
+	if (tty_register_driver(&callout_driver))
+		panic("Couldn't register callout driver\n");
+	
+	for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
+		state->baud_base = get_au1000_uart_baud();
+		state->magic = SSTATE_MAGIC;
+		state->line = i;
+		state->type = PORT_UNKNOWN;
+		state->custom_divisor = 0;
+		state->close_delay = 5*HZ/10;
+		state->closing_wait = 30*HZ;
+		state->callout_termios = callout_driver.init_termios;
+		state->normal_termios = serial_driver.init_termios;
+		state->icount.cts = state->icount.dsr = 
+			state->icount.rng = state->icount.dcd = 0;
+		state->icount.rx = state->icount.tx = 0;
+		state->icount.frame = state->icount.parity = 0;
+		state->icount.overrun = state->icount.brk = 0;
+		state->irq = irq_cannonicalize(state->irq);
+		if (state->hub6)
+			state->io_type = SERIAL_IO_HUB6;
+		if (state->port && check_region(state->port,8)) {
+			continue;
+		}
+
+		if (state->flags & ASYNC_BOOT_AUTOCONF) {
+			autoconfig(state);
+		}
+	}
+	for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
+		if (state->type == PORT_UNKNOWN) {
+			continue;
+		}
+		printk(KERN_INFO "ttyS%02d%s at 0x%04lx (irq = %d) is a %s\n",
+		       state->line + SERIAL_DEV_OFFSET,
+		       (state->flags & ASYNC_FOURPORT) ? " FourPort" : "",
+		       state->port, state->irq,
+		       uart_config[state->type].name);
+		tty_register_devfs(&serial_driver, 0,
+				   serial_driver.minor_start + state->line);
+		tty_register_devfs(&callout_driver, 0,
+				   callout_driver.minor_start + state->line);
+	}
+	return 0;
+}
+
+/*
+ * register_serial and unregister_serial allows for 16x50 serial ports to be
+ * configured at run-time, to support PCMCIA modems.
+ */
+ 
+/**
+ *	register_serial - configure a 16x50 serial port at runtime
+ *	@req: request structure
+ *
+ *	Configure the serial port specified by the request. If the
+ *	port exists and is in use an error is returned. If the port
+ *	is not currently in the table it is added.
+ *
+ *	The port is then probed and if neccessary the IRQ is autodetected
+ *	If this fails an error is returned.
+ *
+ *	On success the port is ready to use and the line number is returned.
+ */
+ 
+int register_serial(struct serial_struct *req)
+{
+	int i;
+	unsigned long flags;
+	struct serial_state *state;
+	struct async_struct *info;
+	unsigned long port;
+
+	port = req->port;
+	if (HIGH_BITS_OFFSET)
+		port += (unsigned long) req->port_high << HIGH_BITS_OFFSET;
+
+	save_flags(flags); cli();
+	for (i = 0; i < NR_PORTS; i++) {
+		if ((rs_table[i].port == port) &&
+		    (rs_table[i].iomem_base == req->iomem_base))
+			break;
+	}
+	if (i == NR_PORTS) {
+		for (i = 0; i < NR_PORTS; i++)
+			if ((rs_table[i].type == PORT_UNKNOWN) &&
+			    (rs_table[i].count == 0))
+				break;
+	}
+	if (i == NR_PORTS) {
+		restore_flags(flags);
+		return -1;
+	}
+	state = &rs_table[i];
+	if (rs_table[i].count) {
+		restore_flags(flags);
+		printk("Couldn't configure serial #%d (port=%ld,irq=%d): "
+		       "device already open\n", i, port, req->irq);
+		return -1;
+	}
+	state->irq = req->irq;
+	state->port = port;
+	state->flags = req->flags;
+	state->io_type = req->io_type;
+	state->iomem_base = req->iomem_base;
+	state->iomem_reg_shift = req->iomem_reg_shift;
+	if (req->baud_base)
+		state->baud_base = req->baud_base;
+	if ((info = state->info) != NULL) {
+		info->port = port;
+		info->flags = req->flags;
+		info->io_type = req->io_type;
+		info->iomem_base = req->iomem_base;
+		info->iomem_reg_shift = req->iomem_reg_shift;
+	}
+	autoconfig(state);
+	if (state->type == PORT_UNKNOWN) {
+		restore_flags(flags);
+		printk("register_serial(): autoconfig failed\n");
+		return -1;
+	}
+	restore_flags(flags);
+
+       printk(KERN_INFO "ttyS%02d at %s 0x%04lx (irq = %d) is a %s\n",
+	      state->line + SERIAL_DEV_OFFSET,
+	      state->iomem_base ? "iomem" : "port",
+	      state->iomem_base ? (unsigned long)state->iomem_base :
+	      state->port, state->irq, uart_config[state->type].name);
+	tty_register_devfs(&serial_driver, 0,
+			   serial_driver.minor_start + state->line); 
+	tty_register_devfs(&callout_driver, 0,
+			   callout_driver.minor_start + state->line);
+	return state->line + SERIAL_DEV_OFFSET;
+}
+
+/**
+ *	unregister_serial - deconfigure a 16x50 serial port
+ *	@line: line to deconfigure
+ *
+ *	The port specified is deconfigured and its resources are freed. Any
+ *	user of the port is disconnected as if carrier was dropped. Line is
+ *	the port number returned by register_serial().
+ */
+
+void unregister_serial(int line)
+{
+	unsigned long flags;
+	struct serial_state *state = &rs_table[line];
+
+	save_flags(flags); cli();
+	if (state->info && state->info->tty)
+		tty_hangup(state->info->tty);
+	state->type = PORT_UNKNOWN;
+	printk(KERN_INFO "tty%02d unloaded\n", state->line);
+	/* These will be hidden, because they are devices that will no longer
+	 * be available to the system. (ie, PCMCIA modems, once ejected)
+	 */
+	tty_unregister_devfs(&serial_driver,
+			     serial_driver.minor_start + state->line);
+	tty_unregister_devfs(&callout_driver,
+			     callout_driver.minor_start + state->line);
+	restore_flags(flags);
+}
+
+static void __exit rs_fini(void) 
+{
+	unsigned long flags;
+	int e1, e2;
+	int i;
+	struct async_struct *info;
+
+	/* printk("Unloading %s: version %s\n", serial_name, serial_version); */
+	del_timer_sync(&serial_timer);
+	save_flags(flags); cli();
+        remove_bh(SERIAL_BH);
+	if ((e1 = tty_unregister_driver(&serial_driver)))
+		printk("serial: failed to unregister serial driver (%d)\n",
+		       e1);
+	if ((e2 = tty_unregister_driver(&callout_driver)))
+		printk("serial: failed to unregister callout driver (%d)\n", 
+		       e2);
+	restore_flags(flags);
+
+	for (i = 0; i < NR_PORTS; i++) {
+		if ((info = rs_table[i].info)) {
+			rs_table[i].info = NULL;
+			kfree(info);
+		}
+		if ((rs_table[i].type != PORT_UNKNOWN) && rs_table[i].port) {
+				release_region(rs_table[i].port, 8);
+		}
+	}
+	if (tmp_buf) {
+		unsigned long pg = (unsigned long) tmp_buf;
+		tmp_buf = NULL;
+		free_page(pg);
+	}
+}
+
+module_init(rs_init);
+module_exit(rs_fini);
+MODULE_DESCRIPTION("Au1000 serial driver");
+
+
+/*
+ * ------------------------------------------------------------
+ * Serial console driver
+ * ------------------------------------------------------------
+ */
+#ifdef CONFIG_AU1000_SERIAL_CONSOLE
+
+#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
+
+static struct async_struct async_sercons;
+
+/*
+ *	Wait for transmitter & holding register to empty
+ */
+static inline void wait_for_xmitr(struct async_struct *info)
+{
+	unsigned int status, tmout = 0xffffff;
+
+	do {
+		status = serial_in(info, UART_LSR);
+
+		if (status & UART_LSR_BI)
+			lsr_break_flag = UART_LSR_BI;
+		
+		if (--tmout == 0)
+			break;
+	} while((status & BOTH_EMPTY) != BOTH_EMPTY);
+}
+
+
+/*
+ *	Print a string to the serial port trying not to disturb
+ *	any possible real use of the port...
+ *
+ *	The console_lock must be held when we get here.
+ */
+static void serial_console_write(struct console *co, const char *s,
+				unsigned count)
+{
+	static struct async_struct *info = &async_sercons;
+	int ier;
+	unsigned i;
+
+	/*
+	 *	First save the IER then disable the interrupts
+	 */
+	ier = serial_in(info, UART_IER);
+	serial_out(info, UART_IER, 0x00);
+
+	/*
+	 *	Now, do each character
+	 */
+	for (i = 0; i < count; i++, s++) {
+		wait_for_xmitr(info);
+
+		/*
+		 *	Send the character out.
+		 *	If a LF, also do CR...
+		 */
+		serial_out(info, UART_TX, *s);
+		if (*s == 10) {
+			wait_for_xmitr(info);
+			serial_out(info, UART_TX, 13);
+		}
+	}
+
+	/*
+	 *	Finally, Wait for transmitter & holding register to empty
+	 * 	and restore the IER
+	 */
+	wait_for_xmitr(info);
+	serial_out(info, UART_IER, ier);
+}
+
+/*
+ *	Receive character from the serial port
+ */
+static int serial_console_wait_key(struct console *co)
+{
+	static struct async_struct *info;
+	int ier, c;
+
+	info = &async_sercons;
+
+	/*
+	 *	First save the IER then disable the interrupts so
+	 *	that the real driver for the port does not get the
+	 *	character.
+	 */
+	ier = serial_in(info, UART_IER);
+	serial_out(info, UART_IER, 0x00);
+ 
+	while ((serial_in(info, UART_LSR) & UART_LSR_DR) == 0);
+	c = serial_in(info, UART_RX);
+
+	/*
+	 *	Restore the interrupts
+	 */
+	serial_out(info, UART_IER, ier);
+
+	return c;
+}
+
+static kdev_t serial_console_device(struct console *c)
+{
+	return MKDEV(TTY_MAJOR, 64 + c->index);
+}
+
+/*
+ *	Setup initial baud/bits/parity. We do two things here:
+ *	- construct a cflag setting for the first rs_open()
+ *	- initialize the serial port
+ *	Return non-zero if we didn't find a serial port.
+ */
+static int __init serial_console_setup(struct console *co, char *options)
+{
+	static struct async_struct *info;
+	struct serial_state *state;
+	unsigned cval;
+	int	baud = 9600;
+	int	bits = 8;
+	int	parity = 'n';
+	int	cflag = CREAD | HUPCL | CLOCAL;
+	int	quot = 0;
+	char	*s;
+
+	if (options) {
+		baud = simple_strtoul(options, NULL, 10);
+		s = options;
+		while(*s >= '0' && *s <= '9')
+			s++;
+		if (*s) parity = *s++;
+		if (*s) bits   = *s - '0';
+	}
+
+	/*
+	 *	Now construct a cflag setting.
+	 */
+	switch(baud) {
+		case 1200:
+			cflag |= B1200;
+			break;
+		case 2400:
+			cflag |= B2400;
+			break;
+		case 4800:
+			cflag |= B4800;
+			break;
+		case 19200:
+			cflag |= B19200;
+			break;
+		case 38400:
+			cflag |= B38400;
+			break;
+		case 57600:
+			cflag |= B57600;
+			break;
+		case 115200:
+			cflag |= B115200;
+			break;
+		case 9600:
+		default:
+			cflag |= B9600;
+			break;
+	}
+	switch(bits) {
+		case 7:
+			cflag |= CS7;
+			break;
+		default:
+		case 8:
+			cflag |= CS8;
+			break;
+	}
+	switch(parity) {
+		case 'o': case 'O':
+			cflag |= PARODD;
+			break;
+		case 'e': case 'E':
+			cflag |= PARENB;
+			break;
+	}
+	co->cflag = cflag;
+
+	/*
+	 *	Divisor, bytesize and parity
+	 */
+	state = rs_table + co->index;
+	info = &async_sercons;
+	info->magic = SERIAL_MAGIC;
+	info->state = state;
+	info->port = state->port;
+	info->flags = state->flags;
+	info->io_type = state->io_type;
+	info->iomem_base = state->iomem_base;
+	info->iomem_reg_shift = state->iomem_reg_shift;
+	state->baud_base = get_au1000_uart_baud();
+	quot = state->baud_base / baud;
+
+	cval = cflag & (CSIZE | CSTOPB);
+	cval >>= 4;
+	if (cflag & PARENB)
+		cval |= UART_LCR_PARITY;
+	if (!(cflag & PARODD))
+		cval |= UART_LCR_EPAR;
+
+	/*
+	 *	Disable UART interrupts, set DTR and RTS high
+	 *	and set speed.
+	 */
+	serial_out(info, UART_CLK, quot & 0xffff);
+	serial_out(info, UART_IER, 0);
+	serial_out(info, UART_MCR, UART_MCR_DTR | UART_MCR_RTS);
+
+	/*
+	 *	If we read 0xff from the LSR, there is no UART here.
+	 */
+	if (serial_in(info, UART_LSR) == 0xff)
+		return -1;
+
+	return 0;
+}
+
+static struct console sercons = {
+	name:		"ttyS",
+	write:		serial_console_write,
+	device:		serial_console_device,
+	wait_key:	serial_console_wait_key,
+	setup:		serial_console_setup,
+	flags:		CON_PRINTBUFFER,
+	index:		-1,
+};
+
+/*
+ *	Register console.
+ */
+void __init au1000_serial_console_init(void)
+{
+	register_console(&sercons);
+}
+#endif
+
+/*
+  Local variables:
+  compile-command: "gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -fno-strict-aliasing -pipe -fno-strength-reduce -march=i586 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h   -DEXPORT_SYMTAB -c serial.c"
+  End:
+*/
diff --git a/arch/mips/au1000/common/time.c b/arch/mips/au1000/common/time.c
new file mode 100644
index 000000000..b8f58b673
--- /dev/null
+++ b/arch/mips/au1000/common/time.c
@@ -0,0 +1,286 @@
+/*
+ * Copyright (C) 2001 MontaVista Software, ppopov@mvista.com
+ * Copied and modified Carsten Langgaard's time.c
+ *
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ * ########################################################################
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * ########################################################################
+ *
+ * Setting up the clock on the MIPS boards.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel_stat.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+
+#include <asm/mipsregs.h>
+#include <asm/ptrace.h>
+#include <asm/div64.h>
+#include <asm/au1000.h>
+
+#include <linux/mc146818rtc.h>
+#include <linux/timex.h>
+
+extern volatile unsigned long wall_jiffies;
+unsigned long missed_heart_beats = 0;
+unsigned long uart_baud_base;
+
+static unsigned long r4k_offset; /* Amount to increment compare reg each time */
+static unsigned long r4k_cur;    /* What counter should be at next timer irq */
+extern rwlock_t xtime_lock;
+
+#define ALLINTS (IE_IRQ0 | IE_IRQ1 | IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5)
+
+static inline void ack_r4ktimer(unsigned long newval)
+{
+	write_32bit_cp0_register(CP0_COMPARE, newval);
+}
+
+
+/*
+ * There are a lot of conceptually broken versions of the MIPS timer interrupt
+ * handler floating around.  This one is rather different, but the algorithm
+ * is provably more robust.
+ */
+unsigned long wtimer;
+void mips_timer_interrupt(struct pt_regs *regs)
+{
+	int irq = 7;
+
+	if (r4k_offset == 0)
+		goto null;
+
+	do {
+		kstat.irqs[0][irq]++;
+		do_timer(regs);
+		r4k_cur += r4k_offset;
+		ack_r4ktimer(r4k_cur);
+
+	} while (((unsigned long)read_32bit_cp0_register(CP0_COUNT)
+	         - r4k_cur) < 0x7fffffff);
+
+	return;
+
+null:
+	ack_r4ktimer(0);
+}
+
+/* 
+ * Figure out the r4k offset, the amount to increment the compare
+ * register for each time tick. 
+ * Use the Programmable Counter 1 to do this.
+ */
+unsigned long cal_r4koff(void)
+{
+	unsigned long count;
+	unsigned long cpu_pll;
+	unsigned long cpu_speed;
+	unsigned long start, end;
+	unsigned long counter;
+	int i;
+	int trim_divide = 16;
+
+	counter = inl(PC_COUNTER_CNTRL);
+	outl(counter | PC_CNTRL_EN1, PC_COUNTER_CNTRL);
+
+	while (inl(PC_COUNTER_CNTRL) & PC_CNTRL_T1S);
+	outl(trim_divide-1, PC1_TRIM);    /* RTC now ticks at 32.768/16 kHz */
+	while (inl(PC_COUNTER_CNTRL) & PC_CNTRL_T1S);
+
+	while (inl(PC_COUNTER_CNTRL) & PC_CNTRL_C1S);
+	outl (0, PC1_COUNTER_WRITE);
+	while (inl(PC_COUNTER_CNTRL) & PC_CNTRL_C1S);
+
+	start = inl(PC1_COUNTER_READ);
+	start += 2;
+	/* wait for the beginning of a new tick */
+	while (inl(PC1_COUNTER_READ) < start);
+
+	/* Start r4k counter. */
+	write_32bit_cp0_register(CP0_COUNT, 0);
+	end = start + (32768 / trim_divide)/2; /* wait 0.5 seconds */
+
+	while (end > inl(PC1_COUNTER_READ));
+
+	count = read_32bit_cp0_register(CP0_COUNT);
+	cpu_speed = count * 2;
+	uart_baud_base = (((cpu_speed) / 4) / 16);
+	return (cpu_speed / HZ);
+}
+
+static unsigned long __init get_mips_time(void)
+{
+	return inl(PC0_COUNTER_READ);
+}
+
+void __init time_init(void)
+{
+        unsigned int est_freq, flags;
+
+	printk("calculating r4koff... ");
+	r4k_offset = cal_r4koff();
+	printk("%08lx(%d)\n", r4k_offset, (int) r4k_offset);
+
+	//est_freq = 2*r4k_offset*HZ;	
+	est_freq = r4k_offset*HZ;	
+	est_freq += 5000;    /* round */
+	est_freq -= est_freq%10000;
+	printk("CPU frequency %d.%02d MHz\n", est_freq/1000000, 
+	       (est_freq%1000000)*100/1000000);
+	r4k_cur = (read_32bit_cp0_register(CP0_COUNT) + r4k_offset);
+
+	write_32bit_cp0_register(CP0_COMPARE, r4k_cur);
+	set_cp0_status(ALLINTS);
+
+	/* Read time from the RTC chipset. */
+	write_lock_irqsave (&xtime_lock, flags);
+	xtime.tv_sec = get_mips_time();
+	xtime.tv_usec = 0;
+	write_unlock_irqrestore(&xtime_lock, flags);
+}
+
+/* This is for machines which generate the exact clock. */
+#define USECS_PER_JIFFY (1000000/HZ)
+#define USECS_PER_JIFFY_FRAC (0x100000000*1000000/HZ&0xffffffff)
+
+/* Cycle counter value at the previous timer interrupt.. */
+
+static unsigned int timerhi = 0, timerlo = 0;
+
+static unsigned long
+div64_32(unsigned long v1, unsigned long v2, unsigned long v3)
+{
+	unsigned long r0;
+	do_div64_32(r0, v1, v2, v3);
+	return r0;
+}
+
+
+/*
+ * FIXME: Does playing with the RP bit in c0_status interfere with this code?
+ */
+static unsigned long do_fast_gettimeoffset(void)
+{
+	u32 count;
+	unsigned long res, tmp;
+	unsigned long r0;
+
+	/* Last jiffy when do_fast_gettimeoffset() was called. */
+	static unsigned long last_jiffies=0;
+	unsigned long quotient;
+
+	/*
+	 * Cached "1/(clocks per usec)*2^32" value.
+	 * It has to be recalculated once each jiffy.
+	 */
+	static unsigned long cached_quotient=0;
+
+	tmp = jiffies;
+
+	quotient = cached_quotient;
+
+	if (tmp && last_jiffies != tmp) {
+		last_jiffies = tmp;
+		if (last_jiffies != 0) {
+			r0 = div64_32(timerhi, timerlo, tmp);
+			quotient = div64_32(USECS_PER_JIFFY, USECS_PER_JIFFY_FRAC, r0);
+			cached_quotient = quotient;
+		}
+	}
+
+	/* Get last timer tick in absolute kernel time */
+	count = read_32bit_cp0_register(CP0_COUNT);
+
+	/* .. relative to previous jiffy (32 bits is enough) */
+	count -= timerlo;
+
+	__asm__("multu\t%1,%2\n\t"
+		"mfhi\t%0"
+		:"=r" (res)
+		:"r" (count),
+		 "r" (quotient));
+
+	/*
+ 	 * Due to possible jiffies inconsistencies, we need to check 
+	 * the result so that we'll get a timer that is monotonic.
+	 */
+	if (res >= USECS_PER_JIFFY)
+		res = USECS_PER_JIFFY-1;
+
+	return res;
+}
+
+void do_gettimeofday(struct timeval *tv)
+{
+	unsigned int flags;
+
+	read_lock_irqsave (&xtime_lock, flags);
+	*tv = xtime;
+	tv->tv_usec += do_fast_gettimeoffset();
+
+	/*
+	 * xtime is atomically updated in timer_bh. jiffies - wall_jiffies
+	 * is nonzero if the timer bottom half hasnt executed yet.
+	 */
+	if (jiffies - wall_jiffies)
+		tv->tv_usec += USECS_PER_JIFFY;
+
+	read_unlock_irqrestore (&xtime_lock, flags);
+
+	if (tv->tv_usec >= 1000000) {
+		tv->tv_usec -= 1000000;
+		tv->tv_sec++;
+	}
+}
+
+void do_settimeofday(struct timeval *tv)
+{
+	write_lock_irq (&xtime_lock);
+
+	/* This is revolting. We need to set the xtime.tv_usec correctly.
+	 * However, the value in this location is is value at the last tick.
+	 * Discover what correction gettimeofday would have done, and then
+	 * undo it!
+	 */
+	tv->tv_usec -= do_fast_gettimeoffset();
+
+	if (tv->tv_usec < 0) {
+		tv->tv_usec += 1000000;
+		tv->tv_sec--;
+	}
+
+	xtime = *tv;
+	time_adjust = 0;		/* stop active adjtime() */
+	time_status |= STA_UNSYNC;
+	time_maxerror = NTP_PHASE_LIMIT;
+	time_esterror = NTP_PHASE_LIMIT;
+
+	write_unlock_irq (&xtime_lock);
+}
+
+/*
+ * The UART baud base is not known at compile time ... if
+ * we want to be able to use the same code on different
+ * speed CPUs.
+ */
+unsigned long get_au1000_uart_baud()
+{
+	return uart_baud_base;
+}
diff --git a/arch/mips/au1000/pb1000/Makefile b/arch/mips/au1000/pb1000/Makefile
new file mode 100644
index 000000000..c6d318793
--- /dev/null
+++ b/arch/mips/au1000/pb1000/Makefile
@@ -0,0 +1,24 @@
+#
+#  Copyright 2000 MontaVista Software Inc.
+#  Author: MontaVista Software, Inc.
+#     	ppopov@mvista.com or support@mvista.com
+#
+# Makefile for the Alchemy Semiconductor PB1000 board.
+#
+# Note! Dependencies are done automagically by 'make dep', which also
+# removes any old dependencies. DON'T put your own dependencies here
+# unless it's something special (ie not a .c file).
+#
+
+.S.s:
+	$(CPP) $(CFLAGS) $< -o $*.s
+.S.o:
+	$(CC) $(CFLAGS) -c $< -o $*.o
+
+all: pb1000.o
+
+O_TARGET := pb1000.o
+
+obj-y := init.o setup.o
+
+include $(TOPDIR)/Rules.make
diff --git a/arch/mips/au1000/pb1000/init.c b/arch/mips/au1000/pb1000/init.c
new file mode 100644
index 000000000..27cbae887
--- /dev/null
+++ b/arch/mips/au1000/pb1000/init.c
@@ -0,0 +1,59 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *	PB1000 board setup
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *         	ppopov@mvista.com or support@mvista.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.
+ *
+ *  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/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/bootmem.h>
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+int prom_argc;
+char **prom_argv, **prom_envp;
+extern void  __init prom_init_cmdline(void);
+
+int __init prom_init(int argc, char **argv, char **envp, int *prom_vec)
+{
+	prom_argc = argc;
+	prom_argv = argv;
+	prom_envp = envp;
+
+	mips_machgroup = MACH_GROUP_ALCHEMY;
+	mips_machtype = MACH_PB1000;  
+
+	prom_init_cmdline();
+
+	add_memory_region(1, 64 << 20, BOOT_MEM_RAM);
+
+	return 0;
+}
diff --git a/arch/mips/au1000/pb1000/setup.c b/arch/mips/au1000/pb1000/setup.c
new file mode 100644
index 000000000..aaa80694f
--- /dev/null
+++ b/arch/mips/au1000/pb1000/setup.c
@@ -0,0 +1,117 @@
+/*
+ *
+ * BRIEF MODULE DESCRIPTION
+ *	Au1000-based board setup.
+ *
+ * Copyright 2000 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc.
+ *         	ppopov@mvista.com or support@mvista.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.
+ *
+ *  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/init.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/console.h>
+#include <linux/mc146818rtc.h>
+
+#include <asm/cpu.h>
+#include <asm/bootinfo.h>
+#include <asm/irq.h>
+#include <asm/mipsregs.h>
+#include <asm/reboot.h>
+#include <asm/au1000.h>
+
+#if defined(CONFIG_AU1000_SERIAL_CONSOLE)
+extern void console_setup(char *, int *);
+char serial_console[20];
+#endif
+
+void (*__wbflush) (void);
+extern struct rtc_ops no_rtc_ops;
+extern char * __init prom_getcmdline(void);
+extern void au1000_restart(void);
+extern void au1000_halt(void);
+extern void au1000_power_off(void);
+
+struct {
+    struct resource ram;
+    struct resource io;
+    struct resource sram;
+    struct resource flash;
+    struct resource boot;
+    struct resource pcmcia;
+    struct resource lcd;
+} au1000_resources = {
+    { "RAM",           0,          0x3FFFFFF,  IORESOURCE_MEM },
+    { "I/O",           0x10000000, 0x119FFFFF                 },
+    { "SRAM",          0x1e000000, 0x1E03FFFF                 },
+    { "System Flash",  0x1F800000, 0x1FBFFFFF                 },
+    { "Boot ROM",      0x1FC00000, 0x1FFFFFFF                 },
+    { "PCMCIA",        0x20000000, 0x27FFFFFF                 },
+    { "LCD",           0x60000000, 0x603FFFFF                 },
+};
+
+void au1000_wbflush(void)
+{
+	__asm__ volatile ("sync");
+}
+
+void __init au1000_setup(void)
+{
+	char *argptr;
+
+	argptr = prom_getcmdline();
+
+#ifdef CONFIG_AU1000_SERIAL_CONSOLE
+	if ((argptr = strstr(argptr, "console=ttyS0")) == NULL) {
+		argptr = prom_getcmdline();
+		strcat(argptr, " console=ttyS0,115200");
+	}
+#endif	  
+
+	//set_cp0_status(ST0_FR,0);
+	rtc_ops = &no_rtc_ops;
+        __wbflush = au1000_wbflush;
+	_machine_restart = au1000_restart;
+	_machine_halt = au1000_halt;
+	_machine_power_off = au1000_power_off;
+
+	/*
+	 * IO/MEM resources. 
+	 */
+	mips_io_port_base = KSEG1;
+	ioport_resource.start = au1000_resources.io.start;
+	ioport_resource.end = au1000_resources.lcd.end;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
+#endif
+
+	outl(PC_CNTRL_E0 | PC_CNTRL_EN0 | PC_CNTRL_EN0, PC_COUNTER_CNTRL);
+	while (inl(PC_COUNTER_CNTRL) & PC_CNTRL_T0S);
+	outl(0x8000-1, PC0_TRIM);
+
+	printk("Alchemy Semi PB1000 Board\n");
+	printk("Au1000/PB1000 port (C) 2001 MontaVista Software, Inc. (source@mvista.com)\n");
+}
+
diff --git a/arch/mips/config.in b/arch/mips/config.in
index 9b70f1f2e..5a0a17c57 100644
--- a/arch/mips/config.in
+++ b/arch/mips/config.in
@@ -65,6 +65,7 @@ bool 'Support for ITE 8172G board' CONFIG_MIPS_ITE8172
        fi
        bool '    Enable Smart Card Reader 0 Support ' CONFIG_IT8172_SCR0
    fi
+bool 'Support for Alchemy Semi PB1000 board' CONFIG_MIPS_PB1000
 
 #
 # Select some configuration options automatically for certain systems.
@@ -177,6 +178,9 @@ fi
 if [ "$CONFIG_MIPS_IVR" = "y" ]; then
    define_bool CONFIG_PCI y
 fi
+if [ "$CONFIG_MIPS_PB1000" = "y" ]; then
+   define_bool CONFIG_MIPS_AU1000 y
+fi
 if [ "$CONFIG_NINO" = "y" ]; then
    define_bool CONFIG_PC_KEYB y
 fi
@@ -480,7 +484,7 @@ bool 'Are you using a crosscompiler' CONFIG_CROSSCOMPILE
 if [ "$CONFIG_MODULES" = "y" ]; then
    bool ' Build fp execption handler module' CONFIG_MIPS_FPE_MODULE
 fi
-if [ "$CONFIG_SERIAL" = "y" ]; then
+if [ "$CONFIG_SERIAL" = "y" -o "$CONFIG_AU1000_UART" = "y" ]; then
   bool 'Remote GDB kernel debugging' CONFIG_REMOTE_DEBUG
 fi
 if [ "$CONFIG_SERIAL" = "y" ]; then
diff --git a/arch/mips/defconfig b/arch/mips/defconfig
index a9bb345dd..371fa391f 100644
--- a/arch/mips/defconfig
+++ b/arch/mips/defconfig
@@ -30,6 +30,7 @@ CONFIG_SGI_IP22=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_ARC32=y
diff --git a/arch/mips/defconfig-atlas b/arch/mips/defconfig-atlas
index ba8632bd9..27eaadd48 100644
--- a/arch/mips/defconfig-atlas
+++ b/arch/mips/defconfig-atlas
@@ -30,6 +30,7 @@ CONFIG_MIPS_ATLAS=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_PCI=y
diff --git a/arch/mips/defconfig-ddb5476 b/arch/mips/defconfig-ddb5476
index 6a890050c..018f9ac65 100644
--- a/arch/mips/defconfig-ddb5476
+++ b/arch/mips/defconfig-ddb5476
@@ -30,6 +30,7 @@ CONFIG_DDB5476=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_I8259=y
diff --git a/arch/mips/defconfig-decstation b/arch/mips/defconfig-decstation
index f6ac3193d..640647952 100644
--- a/arch/mips/defconfig-decstation
+++ b/arch/mips/defconfig-decstation
@@ -30,6 +30,7 @@ CONFIG_DECSTATION=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 # CONFIG_ISA is not set
diff --git a/arch/mips/defconfig-ev64120 b/arch/mips/defconfig-ev64120
index 3a0abe35c..d03094048 100644
--- a/arch/mips/defconfig-ev64120
+++ b/arch/mips/defconfig-ev64120
@@ -34,6 +34,7 @@ CONFIG_SYSCLK_100=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_PCI=y
diff --git a/arch/mips/defconfig-ev96100 b/arch/mips/defconfig-ev96100
index d3300ed4a..ba5484881 100644
--- a/arch/mips/defconfig-ev96100
+++ b/arch/mips/defconfig-ev96100
@@ -30,6 +30,7 @@ CONFIG_MIPS_EV96100=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_PCI=y
diff --git a/arch/mips/defconfig-ip22 b/arch/mips/defconfig-ip22
index a9bb345dd..371fa391f 100644
--- a/arch/mips/defconfig-ip22
+++ b/arch/mips/defconfig-ip22
@@ -30,6 +30,7 @@ CONFIG_SGI_IP22=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_ARC32=y
diff --git a/arch/mips/defconfig-it8172 b/arch/mips/defconfig-it8172
index 3881cd44f..fa9e7d07f 100644
--- a/arch/mips/defconfig-it8172
+++ b/arch/mips/defconfig-it8172
@@ -35,6 +35,7 @@ CONFIG_IT8172_CIR=y
 # CONFIG_IT8172_SCR0 is not set
 # CONFIG_IT8172_SCR1 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_PCI=y
diff --git a/arch/mips/defconfig-malta b/arch/mips/defconfig-malta
index 1e02a2837..0786d4a8a 100644
--- a/arch/mips/defconfig-malta
+++ b/arch/mips/defconfig-malta
@@ -30,6 +30,7 @@ CONFIG_MIPS_MALTA=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_I8259=y
diff --git a/arch/mips/defconfig-nino b/arch/mips/defconfig-nino
index 23d024cd1..a82abd780 100644
--- a/arch/mips/defconfig-nino
+++ b/arch/mips/defconfig-nino
@@ -33,6 +33,7 @@ CONFIG_NINO_8MB=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_PC_KEYB=y
@@ -184,6 +185,7 @@ CONFIG_SERIAL_NONSTANDARD=y
 # CONFIG_STALDRV is not set
 CONFIG_SERIAL_TX3912=y
 CONFIG_SERIAL_TX3912_CONSOLE=y
+# CONFIG_AU1000_UART is not set
 CONFIG_UNIX98_PTYS=y
 CONFIG_UNIX98_PTY_COUNT=256
 
diff --git a/arch/mips/defconfig-ocelot b/arch/mips/defconfig-ocelot
index 49a9763b1..15fe6a913 100644
--- a/arch/mips/defconfig-ocelot
+++ b/arch/mips/defconfig-ocelot
@@ -30,6 +30,7 @@ CONFIG_MOMENCO_OCELOT=y
 # CONFIG_SNI_RM200_PCI is not set
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_PCI=y
diff --git a/arch/mips/defconfig-pb1000 b/arch/mips/defconfig-pb1000
new file mode 100644
index 000000000..df574b8dd
--- /dev/null
+++ b/arch/mips/defconfig-pb1000
@@ -0,0 +1,445 @@
+#
+# Automatically generated make config: don't edit
+#
+CONFIG_MIPS=y
+# CONFIG_SMP is not set
+
+#
+# Code maturity level options
+#
+CONFIG_EXPERIMENTAL=y
+
+#
+# Machine selection
+#
+# CONFIG_ACER_PICA_61 is not set
+# CONFIG_ALGOR_P4032 is not set
+# CONFIG_BAGET_MIPS is not set
+# CONFIG_DECSTATION is not set
+# CONFIG_DDB5074 is not set
+# CONFIG_MIPS_EV96100 is not set
+# CONFIG_MIPS_EV64120 is not set
+# CONFIG_MIPS_ATLAS is not set
+# CONFIG_MIPS_MALTA is not set
+# CONFIG_NINO is not set
+# CONFIG_MIPS_MAGNUM_4000 is not set
+# CONFIG_MOMENCO_OCELOT is not set
+# CONFIG_DDB5476 is not set
+# CONFIG_OLIVETTI_M700 is not set
+# CONFIG_SGI_IP22 is not set
+# CONFIG_SNI_RM200_PCI is not set
+# CONFIG_MIPS_ITE8172 is not set
+# CONFIG_MIPS_IVR is not set
+CONFIG_MIPS_PB1000=y
+# CONFIG_MCA is not set
+# CONFIG_SBUS is not set
+CONFIG_MIPS_AU1000=y
+# CONFIG_ISA is not set
+# CONFIG_EISA is not set
+# CONFIG_PCI is not set
+# CONFIG_I8259 is not set
+
+#
+# Loadable module support
+#
+# CONFIG_MODULES is not set
+
+#
+# CPU selection
+#
+# CONFIG_CPU_R3000 is not set
+# CONFIG_CPU_R6000 is not set
+# CONFIG_CPU_R4300 is not set
+# CONFIG_CPU_R4X00 is not set
+# CONFIG_CPU_R5000 is not set
+# CONFIG_CPU_R5432 is not set
+# CONFIG_CPU_RM7000 is not set
+# CONFIG_CPU_NEVADA is not set
+# CONFIG_CPU_R10000 is not set
+# CONFIG_CPU_SB1 is not set
+CONFIG_CPU_MIPS32=y
+CONFIG_CPU_ADVANCED=y
+CONFIG_CPU_HAS_LLSC=y
+CONFIG_CPU_HAS_WB=y
+
+#
+# General setup
+#
+CONFIG_CPU_LITTLE_ENDIAN=y
+CONFIG_MIPS_FPU_EMULATOR=y
+CONFIG_KCORE_ELF=y
+CONFIG_ELF_KERNEL=y
+# CONFIG_BINFMT_AOUT is not set
+CONFIG_BINFMT_ELF=y
+# CONFIG_BINFMT_MISC is not set
+CONFIG_NET=y
+# CONFIG_HOTPLUG is not set
+# CONFIG_PCMCIA is not set
+CONFIG_SYSVIPC=y
+# CONFIG_BSD_PROCESS_ACCT is not set
+CONFIG_SYSCTL=y
+
+#
+# Memory Technology Devices (MTD)
+#
+# CONFIG_MTD is not set
+
+#
+# Parallel port support
+#
+# CONFIG_PARPORT is not set
+
+#
+# Block devices
+#
+# CONFIG_BLK_DEV_FD is not set
+# CONFIG_BLK_DEV_XD is not set
+# CONFIG_PARIDE is not set
+# CONFIG_BLK_CPQ_DA is not set
+# CONFIG_BLK_CPQ_CISS_DA is not set
+# CONFIG_BLK_DEV_DAC960 is not set
+# CONFIG_BLK_DEV_LOOP is not set
+# CONFIG_BLK_DEV_NBD is not set
+# CONFIG_BLK_DEV_RAM is not set
+# CONFIG_BLK_DEV_INITRD is not set
+
+#
+# Multi-device support (RAID and LVM)
+#
+# CONFIG_MD is not set
+# CONFIG_BLK_DEV_MD is not set
+# CONFIG_MD_LINEAR is not set
+# CONFIG_MD_RAID0 is not set
+# CONFIG_MD_RAID1 is not set
+# CONFIG_MD_RAID5 is not set
+# CONFIG_BLK_DEV_LVM is not set
+
+#
+# Networking options
+#
+CONFIG_PACKET=y
+# CONFIG_PACKET_MMAP is not set
+# CONFIG_NETLINK is not set
+# CONFIG_NETFILTER is not set
+# CONFIG_FILTER is not set
+CONFIG_UNIX=y
+CONFIG_INET=y
+# CONFIG_IP_MULTICAST is not set
+# CONFIG_IP_ADVANCED_ROUTER is not set
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_BOOTP=y
+# CONFIG_IP_PNP_RARP is not set
+# CONFIG_NET_IPIP is not set
+# CONFIG_NET_IPGRE is not set
+# CONFIG_INET_ECN is not set
+# CONFIG_SYN_COOKIES is not set
+# CONFIG_IPV6 is not set
+# CONFIG_KHTTPD is not set
+# CONFIG_ATM is not set
+
+#
+#  
+#
+# CONFIG_IPX is not set
+# CONFIG_ATALK is not set
+# CONFIG_DECNET is not set
+# CONFIG_BRIDGE is not set
+# CONFIG_X25 is not set
+# CONFIG_LAPB is not set
+# CONFIG_LLC is not set
+# CONFIG_NET_DIVERT is not set
+# CONFIG_ECONET is not set
+# CONFIG_WAN_ROUTER is not set
+# CONFIG_NET_FASTROUTE is not set
+# CONFIG_NET_HW_FLOWCONTROL is not set
+
+#
+# QoS and/or fair queueing
+#
+# CONFIG_NET_SCHED is not set
+
+#
+# Telephony Support
+#
+# CONFIG_PHONE is not set
+# CONFIG_PHONE_IXJ is not set
+
+#
+# ATA/IDE/MFM/RLL support
+#
+# CONFIG_IDE is not set
+# CONFIG_BLK_DEV_IDE_MODES is not set
+# CONFIG_BLK_DEV_HD is not set
+
+#
+# SCSI support
+#
+# CONFIG_SCSI is not set
+
+#
+# I2O device support
+#
+# CONFIG_I2O is not set
+# CONFIG_I2O_BLOCK is not set
+# CONFIG_I2O_LAN is not set
+# CONFIG_I2O_SCSI is not set
+# CONFIG_I2O_PROC is not set
+
+#
+# Network device support
+#
+CONFIG_NETDEVICES=y
+
+#
+# ARCnet devices
+#
+# CONFIG_ARCNET is not set
+# CONFIG_DUMMY is not set
+# CONFIG_BONDING is not set
+# CONFIG_EQUALIZER is not set
+# CONFIG_TUN is not set
+# CONFIG_NET_SB1000 is not set
+
+#
+# Ethernet (10 or 100Mbit)
+#
+CONFIG_NET_ETHERNET=y
+CONFIG_MIPS_AU1000_ENET=y
+# CONFIG_NET_VENDOR_3COM is not set
+# CONFIG_LANCE is not set
+# CONFIG_NET_VENDOR_SMC is not set
+# CONFIG_NET_VENDOR_RACAL is not set
+# CONFIG_AT1700 is not set
+# CONFIG_DEPCA is not set
+# CONFIG_NET_ISA is not set
+# CONFIG_NET_PCI is not set
+# CONFIG_NET_POCKET is not set
+
+#
+# Ethernet (1000 Mbit)
+#
+# CONFIG_ACENIC is not set
+# CONFIG_HAMACHI is not set
+# CONFIG_YELLOWFIN is not set
+# CONFIG_SK98LIN is not set
+# CONFIG_FDDI is not set
+# CONFIG_HIPPI is not set
+# CONFIG_PPP is not set
+# CONFIG_SLIP is not set
+
+#
+# Wireless LAN (non-hamradio)
+#
+# CONFIG_NET_RADIO is not set
+
+#
+# Token Ring devices
+#
+# CONFIG_TR is not set
+# CONFIG_NET_FC is not set
+# CONFIG_RCPCI is not set
+# CONFIG_SHAPER is not set
+
+#
+# Wan interfaces
+#
+# CONFIG_WAN is not set
+
+#
+# Amateur Radio support
+#
+# CONFIG_HAMRADIO is not set
+
+#
+# IrDA (infrared) support
+#
+# CONFIG_IRDA is not set
+
+#
+# ISDN subsystem
+#
+# CONFIG_ISDN is not set
+
+#
+# Old CD-ROM drivers (not SCSI, not IDE)
+#
+# CONFIG_CD_NO_IDESCSI is not set
+
+#
+# Character devices
+#
+# CONFIG_VT is not set
+# CONFIG_SERIAL is not set
+# CONFIG_SERIAL_EXTENDED is not set
+CONFIG_SERIAL_NONSTANDARD=y
+# CONFIG_COMPUTONE is not set
+# CONFIG_ROCKETPORT is not set
+# CONFIG_CYCLADES is not set
+# CONFIG_DIGIEPCA is not set
+# CONFIG_DIGI is not set
+# CONFIG_ESPSERIAL is not set
+# CONFIG_MOXA_INTELLIO is not set
+# CONFIG_MOXA_SMARTIO is not set
+# CONFIG_RISCOM8 is not set
+# CONFIG_SPECIALIX is not set
+# CONFIG_SX is not set
+# CONFIG_RIO is not set
+# CONFIG_STALDRV is not set
+# CONFIG_SERIAL_TX3912 is not set
+# CONFIG_SERIAL_TX3912_CONSOLE is not set
+CONFIG_AU1000_UART=y
+CONFIG_AU1000_SERIAL_CONSOLE=y
+CONFIG_UNIX98_PTYS=y
+CONFIG_UNIX98_PTY_COUNT=256
+
+#
+# I2C support
+#
+# CONFIG_I2C is not set
+
+#
+# Mice
+#
+# CONFIG_BUSMOUSE is not set
+# CONFIG_MOUSE is not set
+
+#
+# Joysticks
+#
+# CONFIG_JOYSTICK is not set
+
+#
+# Input core support is needed for joysticks
+#
+# CONFIG_QIC02_TAPE is not set
+
+#
+# Watchdog Cards
+#
+# CONFIG_WATCHDOG is not set
+# CONFIG_INTEL_RNG is not set
+# CONFIG_NVRAM is not set
+# CONFIG_RTC is not set
+# CONFIG_DTLK is not set
+# CONFIG_R3964 is not set
+# CONFIG_APPLICOM is not set
+
+#
+# Ftape, the floppy tape device driver
+#
+# CONFIG_FTAPE is not set
+# CONFIG_AGP is not set
+# CONFIG_DRM is not set
+
+#
+# Multimedia devices
+#
+# CONFIG_VIDEO_DEV is not set
+
+#
+# File systems
+#
+# CONFIG_QUOTA is not set
+CONFIG_AUTOFS_FS=y
+CONFIG_AUTOFS4_FS=y
+# CONFIG_REISERFS_FS is not set
+# CONFIG_REISERFS_CHECK is not set
+# CONFIG_ADFS_FS is not set
+# CONFIG_ADFS_FS_RW is not set
+# CONFIG_AFFS_FS is not set
+# CONFIG_HFS_FS is not set
+# CONFIG_BFS_FS is not set
+# CONFIG_FAT_FS is not set
+# CONFIG_MSDOS_FS is not set
+# CONFIG_UMSDOS_FS is not set
+# CONFIG_VFAT_FS is not set
+# CONFIG_EFS_FS is not set
+# CONFIG_JFFS_FS is not set
+# CONFIG_CRAMFS is not set
+# CONFIG_RAMFS is not set
+CONFIG_ISO9660_FS=y
+# CONFIG_JOLIET is not set
+# CONFIG_MINIX_FS is not set
+# CONFIG_NTFS_FS is not set
+# CONFIG_NTFS_RW is not set
+# CONFIG_HPFS_FS is not set
+CONFIG_PROC_FS=y
+# CONFIG_DEVFS_FS is not set
+# CONFIG_DEVFS_MOUNT is not set
+# CONFIG_DEVFS_DEBUG is not set
+# CONFIG_DEVPTS_FS is not set
+# CONFIG_QNX4FS_FS is not set
+# CONFIG_QNX4FS_RW is not set
+# CONFIG_ROMFS_FS is not set
+CONFIG_EXT2_FS=y
+# CONFIG_SYSV_FS is not set
+# CONFIG_SYSV_FS_WRITE is not set
+# CONFIG_UDF_FS is not set
+# CONFIG_UDF_RW is not set
+# CONFIG_UFS_FS is not set
+# CONFIG_UFS_FS_WRITE is not set
+
+#
+# Network File Systems
+#
+# CONFIG_CODA_FS is not set
+CONFIG_NFS_FS=y
+# CONFIG_NFS_V3 is not set
+CONFIG_ROOT_NFS=y
+# CONFIG_NFSD is not set
+# CONFIG_NFSD_V3 is not set
+CONFIG_SUNRPC=y
+CONFIG_LOCKD=y
+# CONFIG_SMB_FS is not set
+# CONFIG_NCP_FS is not set
+# CONFIG_NCPFS_PACKET_SIGNING is not set
+# CONFIG_NCPFS_IOCTL_LOCKING is not set
+# CONFIG_NCPFS_STRONG is not set
+# CONFIG_NCPFS_NFS_NS is not set
+# CONFIG_NCPFS_OS2_NS is not set
+# CONFIG_NCPFS_SMALLDOS is not set
+# CONFIG_NCPFS_NLS is not set
+# CONFIG_NCPFS_EXTRAS is not set
+
+#
+# Partition Types
+#
+CONFIG_PARTITION_ADVANCED=y
+# CONFIG_ACORN_PARTITION is not set
+# CONFIG_OSF_PARTITION is not set
+# CONFIG_AMIGA_PARTITION is not set
+# CONFIG_ATARI_PARTITION is not set
+# CONFIG_MAC_PARTITION is not set
+CONFIG_MSDOS_PARTITION=y
+# CONFIG_BSD_DISKLABEL is not set
+# CONFIG_MINIX_SUBPARTITION is not set
+# CONFIG_SOLARIS_X86_PARTITION is not set
+# CONFIG_UNIXWARE_DISKLABEL is not set
+CONFIG_SGI_PARTITION=y
+# CONFIG_ULTRIX_PARTITION is not set
+# CONFIG_SUN_PARTITION is not set
+# CONFIG_SMB_NLS is not set
+# CONFIG_NLS is not set
+
+#
+# Sound
+#
+# CONFIG_SOUND is not set
+
+#
+# USB support
+#
+# CONFIG_USB is not set
+
+#
+# Input core support
+#
+# CONFIG_INPUT is not set
+
+#
+# Kernel hacking
+#
+CONFIG_CROSSCOMPILE=y
+# CONFIG_REMOTE_DEBUG is not set
+# CONFIG_MAGIC_SYSRQ is not set
+# CONFIG_MIPS_UNCACHED is not set
diff --git a/arch/mips/defconfig-rm200 b/arch/mips/defconfig-rm200
index 7959900c2..5cc2d9e5f 100644
--- a/arch/mips/defconfig-rm200
+++ b/arch/mips/defconfig-rm200
@@ -30,6 +30,7 @@ CONFIG_EXPERIMENTAL=y
 CONFIG_SNI_RM200_PCI=y
 # CONFIG_MIPS_ITE8172 is not set
 # CONFIG_MIPS_IVR is not set
+# CONFIG_MIPS_PB1000 is not set
 # CONFIG_MCA is not set
 # CONFIG_SBUS is not set
 CONFIG_ARC32=y
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index 2a066ccaa..773d72c0d 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -44,12 +44,17 @@ int get_cpuinfo(char *buffer)
 	const char *mach_momenco_names[] = GROUP_MOMENCO_NAMES;
  	const char *mach_ite_names[] = GROUP_ITE_NAMES;
 	const char *mach_philips_names[] = GROUP_PHILIPS_NAMES;
+ 	const char *mach_globespan_names[] = GROUP_GLOBESPAN_NAMES;
+	const char *mach_sibyte_names[] = GROUP_SIBYTE_NAMES;
+	const char *mach_toshiba_names[] = GROUP_TOSHIBA_NAMES;
+	const char *mach_alchemy_names[] = GROUP_ALCHEMY_NAMES;
 	const char **mach_group_to_name[] = { mach_unknown_names,
 		mach_jazz_names, mach_dec_names, mach_arc_names,
 		mach_sni_rm_names, mach_acn_names, mach_sgi_names,
 		mach_cobalt_names, mach_nec_ddb_names, mach_baget_names,
 		mach_cosine_names, mach_galileo_names, mach_momenco_names, 
-		mach_ite_names, mach_philips_names};
+		mach_ite_names, mach_philips_names, mach_globespan_names,
+		mach_sibyte_names, mach_toshiba_names, mach_alchemy_names};
 	unsigned int version = read_32bit_cp0_register(CP0_PRID);
 	int len;
 
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 587adaadd..82d44e33e 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -341,6 +341,30 @@ static inline void cpu_probe(void)
 		}		
 		break;
 #endif
+	case PRID_COMP_ALCHEMY:
+		switch (mips_cpu.processor_id & 0xff00) {
+#ifdef CONFIG_CPU_MIPS32
+		case PRID_IMP_AU1000:
+			mips_cpu.cputype = CPU_AU1000;
+			mips_cpu.isa_level = MIPS_CPU_ISA_M32;
+			mips_cpu.options = MIPS_CPU_TLB | MIPS_CPU_4KEX | 
+					   MIPS_CPU_4KTLB | MIPS_CPU_COUNTER | 
+					   MIPS_CPU_DIVEC | MIPS_CPU_WATCH;
+			config1 = read_mips32_cp0_config1();
+			if (config1 & (1 << 3))
+				mips_cpu.options |= MIPS_CPU_WATCH;
+			if (config1 & (1 << 2))
+				mips_cpu.options |= MIPS_CPU_MIPS16;
+			if (config1 & 1)
+				mips_cpu.options |= MIPS_CPU_FPU;
+			mips_cpu.scache.flags = MIPS_CACHE_NOT_PRESENT;
+			break;
+#endif
+		default:
+			mips_cpu.cputype = CPU_UNKNOWN;
+			break;
+		}
+		break;
 	case PRID_COMP_SIBYTE:
 		switch (mips_cpu.processor_id & 0xff00) {
 		case PRID_IMP_SB1:
@@ -596,6 +620,11 @@ void __init setup_arch(char **cmdline_p)
 		nino_setup();
 		break;
 #endif
+#ifdef CONFIG_MIPS_PB1000
+	case MACH_GROUP_ALCHEMY:
+		au1000_setup();
+		break;
+#endif
 	default:
 		panic("Unsupported architecture");
 	}