Add support for gth2 board

Patch by Thomas Lange, Aug 11 2005

9 files changed, 1556 insertions, 0 deletions

diff --git a/board/gth2/Makefile b/board/gth2/Makefile
new file mode 100644
index 000000000..8ef3a51d8
--- /dev/null
+++ b/board/gth2/Makefile
@@ -0,0 +1,41 @@
+#
+# (C) Copyright 2005
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= lib$(BOARD).a
+
+OBJS	= $(BOARD).o flash.o ee_access.o
+SOBJS	= lowlevel_init.o
+
+$(LIB):	.depend $(OBJS) $(SOBJS)
+	$(AR) crv $@ $(OBJS) $(SOBJS)
+
+#########################################################################
+
+.depend:	Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c)
+		$(CC) -M $(CFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/board/gth2/config.mk b/board/gth2/config.mk
new file mode 100644
index 000000000..6d21ba18a
--- /dev/null
+++ b/board/gth2/config.mk
@@ -0,0 +1,42 @@
+#
+# (C) Copyright 2004-2005
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+#
+#  AMD Alchemy AU1000, MIPS32 core
+#
+
+ifeq ($(TBASE),0)
+TEXT_BASE = 0
+else
+ifeq ($(TBASE),1)
+TEXT_BASE = 0xbfc10070
+else
+ifeq ($(TBASE),2)
+TEXT_BASE = 0xbfc30070
+else
+## Only to make ordinary make work
+TEXT_BASE = 0x90000000
+endif
+endif
+endif
+
diff --git a/board/gth2/ee_access.c b/board/gth2/ee_access.c
new file mode 100644
index 000000000..e2931392d
--- /dev/null
+++ b/board/gth2/ee_access.c
@@ -0,0 +1,347 @@
+/* Module for handling DALLAS DS2438, smart battery monitor
+   Chip can store up to 40 bytes of user data in EEPROM,
+   perform temp, voltage and current measurements.
+   Chip also contains a unique serial number.
+
+   Always read/write LSb first
+
+   For documentaion, see data sheet for DS2438, 2438.pdf
+
+   By Thomas.Lange@corelatus.com 001025
+   
+   Copyright (C) 2000-2005 Corelatus AB */
+
+/* This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/au1x00.h>
+#include <asm/io.h>
+#include "ee_dev.h"
+#include "ee_access.h"
+
+/* static int Debug = 1; */
+#undef E_DEBUG
+#define E_DEBUG(fmt,args...) /* */
+/* #define E_DEBUG(fmt,args...) printk("EEA:"fmt,##args); */
+
+/* We dont have kernel functions */
+#define printk printf
+#define KERN_DEBUG
+#define KERN_ERR
+#define EIO 1
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+/* lookup table ripped from DS app note 17, understanding and using cyclic redundancy checks... */
+
+static u8 crc_lookup[256] = {
+	0,	94,	188,	226,	97,	63,	221,	131,
+	194,	156,	126,	32,	163,	253,	31,	65,
+	157,	195,	33,	127,	252,	162,	64,	30,
+	95,	1,	227,	189,	62,	96,	130,	220,
+	35,	125,	159,	193,	66,	28,	254,	160,
+	225,	191,	93,	3,	128,	222,	60,	98,
+	190,	224,	2,	92,	223,	129,	99,	61,
+	124,	34,	192,	158,	29,	67,	161,	255,
+	70,	24,	250,	164,	39,	121,	155,	197,
+	132,	218,	56,	102,	229,	187,	89,	7,
+	219,	133,	103,	57,	186,	228,	6,	88,
+	25,	71,	165,	251,	120,	38,	196,	154,
+	101,	59,	217,	135,	4,	90,	184,	230,
+	167,	249,	27,	69,	198,	152,	122,	36,
+	248,	166,	68,	26,	153,	199,	37,	123,
+	58,	100,	134,	216,	91,	5,	231,	185,
+	140,	210,	48,	110,	237,	179,	81,	15,
+	78,	16,	242,	172,	47,	113,	147,	205,
+	17,	79,	173,	243,	112,	46,	204,	146,
+	211,	141,	111,	49,	178,	236,	14,	80,
+	175,	241,	19,	77,	206,	144,	114,	44,
+	109,	51,	209,	143,	12,	82,	176,	238,
+	50,	108,	142,	208,	83,	13,	239,	177,
+	240,	174,	76,	18,	145,	207,	45,	115,
+	202,	148,	118,	40,	171,	245,	23,	73,
+	8,	86,	180,	234,	105,	55,	213,	139,
+	87,	9,	235,	181,	54,	104,	138,	212,
+	149,	203,	41,	119,	244,	170,	72,	22,
+	233,	183,	85,	11,	136,	214,	52,	106,
+	43,	117,	151,	201,	74,	20,	246,	168,
+	116,	42,	200,	150,	21,	75,	169,	247,
+	182,	232,	10,	84,	215,	137,	107,	53
+};
+
+static void
+write_gpio_data(int value ){
+	if(value){
+		/* Tristate */
+		gpio_tristate(GPIO_EEDQ);
+	}
+	else{
+		/* Drive 0 */
+		gpio_clear(GPIO_EEDQ);
+	}
+}
+
+static u8 make_new_crc( u8 Old_crc, u8 New_value ){
+	/* Compute a new checksum with new byte, using previous checksum as input
+	   See DS app note 17, understanding and using cyclic redundancy checks...
+	   Also see DS2438, page 11 */
+	return( crc_lookup[Old_crc ^ New_value ]); 
+}
+
+int ee_crc_ok( u8 *Buffer, int Len, u8 Crc ){
+	/* Check if the checksum for this buffer is correct */
+	u8 Curr_crc=0;
+	int i;
+	u8 *Curr_byte = Buffer;
+
+	for(i=0;i<Len;i++){
+		Curr_crc = make_new_crc( Curr_crc, *Curr_byte);
+		Curr_byte++;
+	}
+	E_DEBUG("Calculated CRC = 0x%x, read = 0x%x\n", Curr_crc, Crc);
+  
+	if(Curr_crc == Crc){
+		/* Good */ 
+		return(TRUE);
+	}
+	printk(KERN_ERR"EE checksum error, Calculated CRC = 0x%x, read = 0x%x\n", Curr_crc, Crc);
+	return(FALSE);
+}
+
+static void 
+set_idle(void){
+	/* Send idle and keep start time
+	   Continous 1 is idle */
+	WRITE_PORT(1);
+}
+
+
+static int 
+do_cpu_reset(void){
+	/* Release reset and verify that chip responds with presence pulse */
+	int Retries=0;
+	while(Retries<15){
+		udelay(RESET_LOW_TIME);
+
+		/* Send reset */
+		WRITE_PORT(0);
+		udelay(RESET_LOW_TIME);
+    
+		/* Release reset */
+		WRITE_PORT(1);
+    
+		/* Wait for EEPROM to drive output */
+		udelay(PRESENCE_TIMEOUT);
+		if(!READ_PORT){
+			/* Ok, EEPROM is driving a 0 */
+			E_DEBUG("Presence detected\n");
+			if(Retries){
+				E_DEBUG("Retries %d\n",Retries);
+			}
+			/* Make sure chip releases pin */
+			udelay(PRESENCE_LOW_TIME);
+			return 0;
+		}
+		Retries++;
+	}
+
+	printk(KERN_ERR"eeprom did not respond when releasing reset\n");
+    
+	/* Make sure chip releases pin */
+	udelay(PRESENCE_LOW_TIME);
+
+	/* Set to idle again */
+	set_idle();
+ 
+	return(-EIO);
+}
+
+static u8 
+read_cpu_byte(void){
+	/* Read a single byte from EEPROM
+	   Read LSb first */
+	int i;
+	int Value;
+	u8 Result=0;
+	u32 Flags;
+
+	E_DEBUG("Reading byte\n");
+  
+	for(i=0;i<8;i++){
+		/* Small delay between pulses */
+		udelay(1);
+
+#ifdef __KERNEL__  
+		/* Disable irq */ 
+		save_flags(Flags);
+		cli();
+#endif    
+
+		/* Pull down pin short time to start read
+		   See page 26 in data sheet */
+    
+		WRITE_PORT(0);
+		udelay(READ_LOW);
+		WRITE_PORT(1);
+        
+		/* Wait for chip to drive pin */
+		udelay(READ_TIMEOUT);
+    
+		Value = READ_PORT;
+		if(Value)
+			Value=1;
+
+#ifdef __KERNEL__
+		/* Enable irq */ 
+		restore_flags(Flags);
+#endif
+    
+		/* Wait for chip to release pin */
+		udelay(TOTAL_READ_LOW-READ_TIMEOUT);
+
+		/* LSb first */
+		Result|=Value<<i;
+		/* E_DEBUG("Read %d\n",Value); */
+
+	}
+
+	E_DEBUG("Read byte 0x%x\n",Result);
+
+	return(Result);
+}
+
+static void 
+write_cpu_byte(u8 Byte){
+	/* Write a single byte to EEPROM
+	   Write LSb first */
+	int i;
+	int Value;
+	u32 Flags;
+  
+	E_DEBUG("Writing byte 0x%x\n",Byte);
+  
+	for(i=0;i<8;i++){
+		/* Small delay between pulses */
+		udelay(1);
+		Value = Byte&1;
+    
+#ifdef __KERNEL__
+		/* Disable irq */ 
+		save_flags(Flags);
+		cli();
+#endif    
+
+		/* Pull down pin short time for a 1, long time for a 0
+		   See page 26 in data sheet */
+    
+		WRITE_PORT(0);
+		if(Value){
+			/* Write a 1 */
+			udelay(WRITE_1_LOW);
+		}
+		else{
+			/* Write a 0 */
+			udelay(WRITE_0_LOW);
+		}
+
+		WRITE_PORT(1);
+
+#ifdef __KERNEL__
+		/* Enable irq */ 
+		restore_flags(Flags);
+#endif
+
+		if(Value)
+			/* Wait for chip to read the 1 */
+			udelay(TOTAL_WRITE_LOW-WRITE_1_LOW);
+        
+		/* E_DEBUG("Wrote %d\n",Value); */
+		Byte>>=1;
+	}
+}
+
+int ee_do_cpu_command( u8 *Tx, int Tx_len, u8 *Rx, int Rx_len, int Send_skip ){
+	/* Execute this command string, including 
+	   giving reset and setting to idle after command
+	   if Rx_len is set, we read out data from EEPROM */ 
+	int i;
+
+	E_DEBUG("Command, Tx_len %d, Rx_len %d\n", Tx_len, Rx_len );
+  
+	if(do_cpu_reset()){
+		/* Failed! */
+		return(-EIO);
+	}
+
+	if(Send_skip)
+		/* Always send SKIP_ROM first to tell chip we are sending a command, 
+		   except when we read out rom data for chip */
+		write_cpu_byte(SKIP_ROM);
+  
+	/* Always have Tx data */
+	for(i=0;i<Tx_len;i++){
+		write_cpu_byte(Tx[i]);
+	}
+  
+	if(Rx_len){
+		for(i=0;i<Rx_len;i++){
+			Rx[i]=read_cpu_byte();
+		}
+	}
+  
+	set_idle();
+
+	E_DEBUG("Command done\n");
+
+	return(0);
+} 
+
+int ee_init_cpu_data(void){
+	int i;
+	u8 Tx[10];
+
+	/* Leave it floting since altera is driving the same pin */
+	set_idle();
+
+	/* Copy all User EEPROM data to scratchpad */ 
+	for(i=0;i<USER_PAGES;i++){
+		Tx[0]=RECALL_MEMORY;
+		Tx[1]=EE_USER_PAGE_0+i;
+		if(ee_do_cpu_command(Tx,2,NULL,0,TRUE)) return(-EIO);
+	}
+
+	/* Make sure chip doesnt store measurements in NVRAM */
+	Tx[0]=WRITE_SCRATCHPAD;
+	Tx[1]=0; /* Page */ 
+	Tx[2]=9;
+	if(ee_do_cpu_command(Tx,3,NULL,0,TRUE)) return(-EIO);
+
+	Tx[0]=COPY_SCRATCHPAD;
+	if(ee_do_cpu_command(Tx,2,NULL,0,TRUE)) return(-EIO);
+  
+	for(i=0;i<10;i++){
+		udelay(1000);
+	}
+  
+	return(0);
+}
diff --git a/board/gth2/ee_access.h b/board/gth2/ee_access.h
new file mode 100644
index 000000000..c21730e71
--- /dev/null
+++ b/board/gth2/ee_access.h
@@ -0,0 +1,30 @@
+/* By Thomas.Lange@Corelatus.com 001025 */
+
+/* Definitions for EEPROM/VOLT METER  DS2438 */
+/* Copyright (C) 2000-2005 Corelatus AB */
+
+#ifndef INCeeaccessh
+#define INCeeaccessh
+
+#include <asm/types.h>
+#include "ee_dev.h"
+
+int ee_do_cpu_command( u8 *Tx, int Tx_len, u8 *Rx, int Rx_len, int Send_skip );
+int ee_init_cpu_data(void);
+
+int ee_crc_ok( u8 *Buffer, int Len, u8 Crc );
+
+/* Defs for altera reg */
+#define EE_WRITE_SHIFT 8 /* bits to shift left */
+#define EE_READ_SHIFT 16 /* bits to shift left */
+#define EE_DONE  0x80000000
+#define EE_BUSY  0x40000000
+#define EE_ERROR 0x20000000
+
+/* Commands */ 
+#define EE_CMD_NOP      0
+#define EE_CMD_INIT_RES 1
+#define EE_CMD_WR_BYTE  2
+#define EE_CMD_RD_BYTE  3
+
+#endif /* INCeeaccessh */
diff --git a/board/gth2/ee_dev.h b/board/gth2/ee_dev.h
new file mode 100644
index 000000000..acc3418f2
--- /dev/null
+++ b/board/gth2/ee_dev.h
@@ -0,0 +1,96 @@
+/* By Thomas.Lange@Corelatus.com 001025 */
+/* Definitions for EEPROM/VOLT METER  DS2438 */
+/* Copyright (C) 2000-2005 Corelatus AB */
+
+/* This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef INCeedevh
+#define INCeedevh
+
+#define E_DEBUG(fmt,args...) if( Debug ) printk(KERN_DEBUG"EE: " fmt, ##args) 
+
+/* MIPS */
+#define WRITE_PORT(Value) write_gpio_data(Value)
+
+#define READ_PORT (gpio_read()&GPIO_EEDQ)
+
+/* 64 bytes chip */
+#define EE_CHIP_SIZE 64
+
+/* Board with new current resistor */
+#define EE_GTH_0304 1
+
+/* new dsp and 64 MB SDRAM */
+#define EE_DSP_64 0x10
+
+/* microsecs */
+/* Pull line down at least this long for reset pulse */
+#define RESET_LOW_TIME    490
+
+/* Read presence pulse after we release reset pulse */
+#define PRESENCE_TIMEOUT  100
+#define PRESENCE_LOW_TIME 200
+
+#define WRITE_0_LOW 60
+#define WRITE_1_LOW 1
+#define TOTAL_WRITE_LOW 60
+
+#define READ_LOW        1
+#define READ_TIMEOUT   10
+#define TOTAL_READ_LOW 70
+
+/* Rom function commands */
+#define READ_ROM   0x33
+#define MATCH_ROM  0x55
+#define SKIP_ROM   0xCC
+#define SEARCH_ROM 0xF0
+
+
+/* Memory_command_function */
+#define WRITE_SCRATCHPAD 0x4E
+#define READ_SCRATCHPAD  0xBE
+#define COPY_SCRATCHPAD  0x48
+#define RECALL_MEMORY    0xB8
+#define CONVERT_TEMP     0x44
+#define CONVERT_VOLTAGE  0xB4
+
+/* Chip is divided in 8 pages, 8 bytes each */
+
+#define EE_PAGE_SIZE 8
+
+/* All chip data we want are in page 0 */
+
+/* Bytes in page 0 */
+#define EE_P0_STATUS   0
+#define EE_P0_TEMP_LSB 1
+#define EE_P0_TEMP_MSB 2
+#define EE_P0_VOLT_LSB 3
+#define EE_P0_VOLT_MSB 4
+#define EE_P0_CURRENT_LSB 5
+#define EE_P0_CURRENT_MSB 6
+
+
+/* 40 byte user data is located at page 3-7 */
+#define EE_USER_PAGE_0 3
+#define USER_PAGES 5
+
+/* Layout of gth user pages usage */
+/* Bytes 0-16   ethernet addr in ascii ( len 17 ) */
+
+#define EE_ETHERNET_OFFSET       0
+
+#endif /* INCeedevh */
diff --git a/board/gth2/flash.c b/board/gth2/flash.c
new file mode 100644
index 000000000..f96edffa2
--- /dev/null
+++ b/board/gth2/flash.c
@@ -0,0 +1,43 @@
+/*
+ * (C) Copyright 2005
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * flash_init()
+ *
+ * sets up flash_info and returns size of FLASH (bytes)
+ */
+unsigned long flash_init (void)
+{
+	printf ("Skipping flash_init\n");
+	return (0);
+}
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	printf ("write_buff not implemented\n");
+	return (-1);
+}
diff --git a/board/gth2/gth2.c b/board/gth2/gth2.c
new file mode 100644
index 000000000..77fc5b469
--- /dev/null
+++ b/board/gth2/gth2.c
@@ -0,0 +1,435 @@
+/*
+ * (C) Copyright 2005
+ * Thomas.Lange@corelatus.se
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/au1x00.h>
+#include <asm/addrspace.h>
+#include <asm/mipsregs.h>
+#include <watchdog.h>
+
+#include "ee_access.h"
+
+static int wdi_status = 0;
+
+unsigned long mips_io_port_base = 0;
+
+#define SDRAM_SIZE ((64*1024*1024)-(12*4096))
+
+
+#define SERIAL_LOG_BUFFER KSEG1ADDR(SDRAM_SIZE + (8*4096))
+
+void inline log_serial_char(char c){
+	char *serial_log_buffer = (char*)SERIAL_LOG_BUFFER;
+	int serial_log_offset;
+	u32 *serial_log_offsetp = (u32*)SERIAL_LOG_BUFFER;
+
+	serial_log_offset = *serial_log_offsetp;
+
+	*(serial_log_buffer + serial_log_offset) = c;
+
+	serial_log_offset++;
+
+	if(serial_log_offset >= 4096){
+		serial_log_offset = 4;
+	}
+	*serial_log_offsetp = serial_log_offset;
+}
+
+void init_log_serial(void){
+	char *serial_log_buffer = (char*)SERIAL_LOG_BUFFER;
+	u32 *serial_log_offsetp = (u32*)SERIAL_LOG_BUFFER;
+
+	/* Copy buffer from last run */
+	memcpy(serial_log_buffer + 4096, 
+	       serial_log_buffer, 
+	       4096);
+
+	memset(serial_log_buffer, 0, 4096);
+
+	*serial_log_offsetp = 4;	
+}
+
+
+void hw_watchdog_reset(void){
+	volatile u32 *sys_outputset = (volatile u32*)SYS_OUTPUTSET;
+	volatile u32 *sys_outputclear = (volatile u32*)SYS_OUTPUTCLR;
+	if(wdi_status){
+		*sys_outputset = GPIO_CPU_LED|GPIO_WDI;
+		wdi_status = 0;
+	}
+	else{
+		*sys_outputclear = GPIO_CPU_LED|GPIO_WDI;
+		wdi_status = 1;
+	}
+}
+
+long int initdram(int board_type)
+{
+	/* Sdram is setup by assembler code */
+	/* If memory could be changed, we should return the true value here */
+
+	WATCHDOG_RESET();
+
+	return (SDRAM_SIZE);
+}
+
+/* In cpu/mips/cpu.c */
+void write_one_tlb( int index, u32 pagemask, u32 hi, u32 low0, u32 low1 );
+
+void set_ledcard(u32 value){
+	/* Clock 24 bits to led card */
+	int i;
+	volatile u32 *sys_outputset = (volatile u32*)SYS_OUTPUTSET;
+	volatile u32 *sys_outputclr = (volatile u32*)SYS_OUTPUTCLR;
+
+	/* Start with known values */
+	*sys_outputclr = GPIO_LEDCLK|GPIO_LEDD;
+
+	for(i=0;i<24;i++){
+		if(value&0x00800000){
+			*sys_outputset = GPIO_LEDD;
+		}
+		else{
+			*sys_outputclr = GPIO_LEDD;
+		}
+		udelay(1);
+		*sys_outputset = GPIO_LEDCLK;
+		udelay(1);
+		*sys_outputclr = GPIO_LEDCLK;
+		udelay(1);
+		
+		value<<=1;
+	}
+	/* Data is enable output */
+	*sys_outputset = GPIO_LEDD;
+}
+
+int checkboard (void)
+{
+	volatile u32 *sys_counter = (volatile u32*)SYS_COUNTER_CNTRL;
+	volatile u32 *sys_outputset = (volatile u32*)SYS_OUTPUTSET;
+	volatile u32 *sys_outputclr = (volatile u32*)SYS_OUTPUTCLR;
+	u32 proc_id;
+
+	WATCHDOG_RESET();
+
+	*sys_counter = 0x100; /* Enable 32 kHz oscillator for RTC/TOY */
+
+	proc_id = read_32bit_cp0_register(CP0_PRID);
+
+	switch (proc_id >> 24) {
+	case 0:
+		puts ("Board: GTH2\n");
+		printf ("CPU: Au1000 500 MHz, id: 0x%02x, rev: 0x%02x\n",
+			(proc_id >> 8) & 0xFF, proc_id & 0xFF);
+		break;
+	default:
+		printf ("Unsupported cpu %d, proc_id=0x%x\n", proc_id >> 24, proc_id);
+	}
+#ifdef CONFIG_IDE_PCMCIA
+	/* PCMCIA is on a 36 bit physical address.
+	   We need to map it into a 32 bit addresses */
+	write_one_tlb(20,                 /* index */
+		      0x01ffe000,         /* Pagemask, 16 MB pages */
+		      CFG_PCMCIA_IO_BASE, /* Hi */
+		      0x3C000017,         /* Lo0 */
+		      0x3C200017);        /* Lo1 */
+
+	write_one_tlb(21,                   /* index */
+		      0x01ffe000,           /* Pagemask, 16 MB pages */
+		      CFG_PCMCIA_ATTR_BASE, /* Hi */
+		      0x3D000017,           /* Lo0 */
+		      0x3D200017);          /* Lo1 */
+
+	write_one_tlb(22,                   /* index */
+		      0x01ffe000,           /* Pagemask, 16 MB pages */
+		      CFG_PCMCIA_MEM_ADDR,  /* Hi */
+		      0x3E000017,           /* Lo0 */
+		      0x3E200017);          /* Lo1 */
+
+#endif	/* CONFIG_IDE_PCMCIA */
+
+	/* Wait for GPIO ports to become stable */
+	udelay(5000); /* FIXME */
+
+	/* Release reset of ethernet PHY chips */
+	/* Always do this, because linux does not know about it */
+	*sys_outputset = GPIO_ERESET;
+
+	/* Kill FPGA:s */
+	*sys_outputclr = GPIO_CACONFIG|GPIO_DPACONFIG;
+	udelay(2);
+	*sys_outputset = GPIO_CACONFIG|GPIO_DPACONFIG;
+
+	/* Turn front led yellow */
+	set_ledcard(0x00100000);
+
+	return 0;
+}
+
+#define POWER_OFFSET    0xF0000
+#define SW_WATCHDOG_REASON 13
+
+#define BOOTDATA_OFFSET 0xF8000
+#define MAX_ATTEMPTS 5
+
+#define FAILSAFE_BOOT 1
+#define SYSTEM_BOOT   2
+#define SYSTEM2_BOOT  3
+
+#define WRITE_FLASH16(a, d)      \
+do                              \
+{                               \
+  *((volatile u16 *) (a)) = (d);\
+ } while(0)
+
+static void write_bootdata (volatile u16 * addr, u8 System, u8 Count)
+{
+	u16 data;
+	volatile u16 *flash = (u16 *) (CFG_FLASH_BASE);
+
+	switch(System){
+	case FAILSAFE_BOOT:
+		printf ("Setting failsafe boot in flash\n");
+		break;
+	case SYSTEM_BOOT:
+		printf ("Setting system boot in flash\n");
+		break;
+	case SYSTEM2_BOOT:
+		printf ("Setting system2 boot in flash\n");
+		break;
+	default:
+		printf ("Invalid system data %u, setting failsafe\n", System);
+		System = FAILSAFE_BOOT;
+	}
+
+	if ((Count < 1) | (Count > MAX_ATTEMPTS)) {
+		printf ("Invalid boot count %u, setting 1\n", Count);
+		Count = 1;
+	}
+	
+	printf ("Boot attempt %d\n", Count);
+
+	data = (System << 8) | Count;
+	/* AMD 16 bit */
+	WRITE_FLASH16 (&flash[0x555], 0xAAAA);
+	WRITE_FLASH16 (&flash[0x2AA], 0x5555);
+	WRITE_FLASH16 (&flash[0x555], 0xA0A0);
+
+	WRITE_FLASH16 (addr, data);
+}
+
+static int random_system(void){
+	/* EEPROM read failed. Just try to choose one 
+	   system release and hope it works */
+	
+	/* FIXME */
+	return(SYSTEM_BOOT);
+}
+
+static int switch_system(int old_system){
+	u8 Rx[10];
+	u8 Tx[5];
+	int valid_release;
+
+	if(old_system==FAILSAFE_BOOT){
+		/* Find out which system release to use */
+
+		/* Copy from nvram to scratchpad */
+		Tx[0] = RECALL_MEMORY;
+		Tx[1] = 7; /* Page */
+		if (ee_do_cpu_command (Tx, 2, NULL, 0, 1)) {
+			printf ("EE user page 7 recall failed\n");
+			return (random_system());
+		}
+
+		Tx[0] = READ_SCRATCHPAD;
+		if (ee_do_cpu_command (Tx, 2, Rx, 9, 1)) {
+			printf ("EE user page 7 read failed\n");
+			return (random_system());
+		}
+		/* Crc in 9:th byte */
+		if (!ee_crc_ok (Rx, 8, *(Rx + 8))) {
+			printf ("EE read failed, page 7. CRC error\n");
+			return (random_system());
+		}
+
+		valid_release = Rx[7];
+		if((valid_release==0xFF)|
+		   ((valid_release&1) == 0)){
+			return(SYSTEM_BOOT);
+		}
+		else{
+			return(SYSTEM2_BOOT);
+		}
+	}
+	else{
+		return(FAILSAFE_BOOT);
+	}
+}
+
+static void check_boot_tries (void)
+{
+	/* Count the number of boot attemps
+	   switch system if too many */
+
+	int i;
+	volatile u16 *addr;
+	volatile u16 data;
+	u8 system = FAILSAFE_BOOT;
+	u8 count;
+
+	addr = (u16 *) (CFG_FLASH_BASE + BOOTDATA_OFFSET);
+
+	if (*addr == 0xFFFF) {
+		printf ("*** No bootdata exists. ***\n");
+		write_bootdata (addr, FAILSAFE_BOOT, 1);
+	} else {
+		/* Search for latest written bootdata */
+		i = 0;
+		while ((*(addr + 1) != 0xFFFF) & (i < 8000)) {
+			addr++;
+			i++;
+		}
+		if (i >= 8000) {
+			/* Whoa, dont write any more */
+			printf ("*** No bootdata found. Not updating flash***\n");
+		} else {
+			/* See how many times we have tried to boot real system */
+			data = *addr;
+			system = data >> 8;
+			count = data & 0xFF;
+			if ((system != SYSTEM_BOOT) & 
+			    (system != SYSTEM2_BOOT) & 
+			    (system != FAILSAFE_BOOT)) {
+				printf ("*** Wrong system %d\n", system);
+				system = FAILSAFE_BOOT;
+				count = 1;
+			} else {
+				switch (count) {
+				case 0:
+				case 1:
+				case 2:
+				case 3:
+				case 4:
+					/* Try same system again if needed */
+					count++;
+					break;
+
+				case 5:
+					/* Switch system and reset tries */
+					count = 1;
+					system = switch_system(system);
+					printf ("***Too many boot attempts, switching system***\n");
+					break;
+				default:
+					/* Switch system, start over and hope it works */
+					printf ("***Unexpected data on addr 0x%x, %u***\n",
+						(u32) addr, data);
+					count = 1;
+					system = switch_system(system);
+				}
+			}
+			write_bootdata (addr + 1, system, count);
+		}
+	}
+	switch(system){
+	case FAILSAFE_BOOT:
+		printf ("Booting failsafe system\n");
+		setenv ("bootargs", "panic=1 root=/dev/hda7");
+		setenv ("bootcmd", "ide reset;disk 0x81000000 0:5;run addmisc;bootm");
+		break;
+
+	case SYSTEM_BOOT:
+		printf ("Using normal system\n");
+		setenv ("bootargs", "panic=1 root=/dev/hda4");
+		setenv ("bootcmd", "ide reset;disk 0x81000000 0:2;run addmisc;bootm");
+		break;
+
+	case SYSTEM2_BOOT:
+		printf ("Using normal system2\n");
+		setenv ("bootargs", "panic=1 root=/dev/hda9");
+		setenv ("bootcmd", "ide reset;disk 0x81000000 0:8;run addmisc;bootm");
+		break;
+	default:
+		printf ("Invalid system %d\n", system);
+		printf ("Hanging\n");
+		while(1);
+	}
+}
+
+int misc_init_r(void){
+	u8 Rx[80];
+	u8 Tx[5];
+	int page;
+	int read = 0;
+
+	WATCHDOG_RESET();
+
+	if (ee_init_cpu_data ()) {
+		printf ("EEPROM init failed\n");
+		return (0);
+	}
+
+	/* Check which release to boot */
+	check_boot_tries ();
+
+	/* Read the pages where ethernet address is stored */
+
+	for (page = EE_USER_PAGE_0; page <= EE_USER_PAGE_0 + 2; page++) {
+		/* Copy from nvram to scratchpad */
+		Tx[0] = RECALL_MEMORY;
+		Tx[1] = page;
+		if (ee_do_cpu_command (Tx, 2, NULL, 0, 1)) {
+			printf ("EE user page %d recall failed\n", page);
+			return (0);
+		}
+
+		Tx[0] = READ_SCRATCHPAD;
+		if (ee_do_cpu_command (Tx, 2, Rx + read, 9, 1)) {
+			printf ("EE user page %d read failed\n", page);
+			return (0);
+		}
+		/* Crc in 9:th byte */
+		if (!ee_crc_ok (Rx + read, 8, *(Rx + read + 8))) {
+			printf ("EE read failed, page %d. CRC error\n", page);
+			return (0);
+		}
+		read += 8;
+	}
+
+	/* Add eos after eth addr */
+	Rx[17] = 0;
+
+	printf ("Ethernet addr read from eeprom: %s\n\n", Rx);
+
+	if ((Rx[2] != ':') |
+	    (Rx[5] != ':') |
+	    (Rx[8] != ':') | (Rx[11] != ':') | (Rx[14] != ':')) {
+		printf ("*** ethernet addr invalid, using default ***\n");
+	} else {
+		setenv ("ethaddr", Rx);
+	}
+	return (0);
+}
diff --git a/board/gth2/lowlevel_init.S b/board/gth2/lowlevel_init.S
new file mode 100644
index 000000000..62e36574d
--- /dev/null
+++ b/board/gth2/lowlevel_init.S
@@ -0,0 +1,454 @@
+/* Memory sub-system initialization code */
+
+#include <config.h>
+#include <version.h>
+#include <asm/regdef.h>
+#include <asm/au1x00.h>
+#include <asm/mipsregs.h>
+
+#define CP0_Config0		$16
+#define MEM_1MS			((CFG_MHZ) * 1000)
+#define GPIO_RJ1LY     (1<<22)
+#define GPIO_CFRESET   (1<<10)
+
+	.text
+	.set noreorder
+	.set mips32
+
+	.globl	lowlevel_init
+lowlevel_init:
+	/*
+	 * Step 2) Establish Status Register
+	 * (set BEV, clear ERL, clear EXL, clear IE)
+	 */
+	li	t1, 0x00400000
+	mtc0	t1, CP0_STATUS
+
+	/*
+	 * Step 3) Establish CP0 Config0
+	 * (set OD, set K0=3)
+	 */
+	li	t1, 0x00080003
+	mtc0	t1, CP0_CONFIG
+
+	/*
+	 * Step 4) Disable Watchpoint facilities
+	 */
+	li t1, 0x00000000
+	mtc0	t1, CP0_WATCHLO
+	mtc0	t1, CP0_IWATCHLO
+	/*
+	 * Step 5) Disable the performance counters
+	 */
+	mtc0	zero, CP0_PERFORMANCE
+	nop
+
+	/*
+	 * Step 6) Establish EJTAG Debug register
+	 */
+	mtc0	zero, CP0_DEBUG
+	nop
+
+	/*
+	 * Step 7) Establish Cause
+	 * (set IV bit)
+	 */
+	li	t1, 0x00800000
+	mtc0	t1, CP0_CAUSE
+
+	/* Establish Wired (and Random) */
+	mtc0	zero, CP0_WIRED
+	nop
+
+	/* No workaround if running from ram */
+	lui	t0, 0xffc0
+	lui	t3, 0xbfc0
+	and	t1, ra, t0
+	bne	t1, t3, noCacheJump
+	nop
+
+	/*** From AMD YAMON ***/
+	/*
+	 * Step 8) Initialize the caches
+	 */
+	li		t0, (16*1024)
+	li		t1, 32
+	li		t2, 0x80000000
+	addu	t3, t0, t2
+cacheloop:
+	cache	0, 0(t2)
+	cache	1, 0(t2)
+	addu	t2, t1
+	bne		t2, t3, cacheloop
+	nop
+
+	/* Save return address */
+	move		t3, ra
+
+	/* Run from cacheable space now */
+	bal		cachehere
+	nop
+cachehere:
+	li		t1, ~0x20000000 /* convert to KSEG0 */
+	and		t0, ra, t1
+	addi	t0, 5*4			/* 5 insns beyond cachehere */
+	jr		t0
+	nop
+
+	/* Restore return address */
+	move		ra, t3
+
+	/*
+	 * Step 9) Initialize the TLB
+	 */
+	li		t0, 0			# index value
+	li		t1, 0x00000000		# entryhi value
+	li		t2, 32			# 32 entries
+
+tlbloop:
+	/* Probe TLB for matching EntryHi */
+	mtc0	t1, CP0_ENTRYHI
+	tlbp
+	nop
+
+	/* Examine Index[P], 1=no matching entry */
+	mfc0	t3, CP0_INDEX
+	li	t4, 0x80000000
+	and	t3, t4, t3
+	addiu	t1, t1, 1		# increment t1 (asid)
+	beq	zero, t3, tlbloop
+	nop
+
+	/* Initialize the TLB entry */
+	mtc0	t0, CP0_INDEX
+	mtc0	zero, CP0_ENTRYLO0
+	mtc0	zero, CP0_ENTRYLO1
+	mtc0	zero, CP0_PAGEMASK
+	tlbwi
+
+	/* Do it again */
+	addiu	t0, t0, 1
+	bne	t0, t2, tlbloop
+	nop
+
+	/* First setup pll:s to make serial work ok */
+	/* We have a 12.5 MHz crystal */
+	li	t0, SYS_CPUPLL
+	li	t1, 0x28  /* CPU clock, 500 MHz */
+	sw	t1, 0(t0)
+	sync
+	nop
+	nop
+
+	/* wait 1mS for clocks to settle */
+	li	t1, MEM_1MS
+1:	add	t1, -1
+	bne	t1, zero, 1b
+	nop
+	/* Setup AUX PLL */
+	li	t0, SYS_AUXPLL
+	li	t1, 0
+	sw	t1, 0(t0) /* aux pll */
+	sync
+
+	/*  Static memory controller */
+	/* RCE0 - can not change while fetching, do so from icache */
+	move		t2, ra /* Store return address */
+	bal		getAddr
+	nop
+
+getAddr:
+	move		t1, ra
+	move		ra, t2 /* Move return addess back */
+
+	cache	0x14,0(t1)
+	cache	0x14,32(t1)
+	/*** /From YAMON ***/
+
+noCacheJump:
+
+	/*  Static memory controller */
+
+	/* RCE0 AMD 29LV800 Flash */
+	li	t0, MEM_STCFG0
+	li	t1, 0x00000243
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STTIME0
+	li	t1, 0x040181D7 /* FIXME */
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STADDR0
+	li	t1, 0x11E03F80
+	sw	t1, 0(t0)
+
+	/* RCE1 PCMCIA 250ns */
+	li	t0, MEM_STCFG1
+	li	t1, 0x00000002
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STTIME1
+	li	t1, 0x280E3E07
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STADDR1
+	li	t1, 0x10000000
+	sw	t1, 0(t0)
+
+	/* RCE2 CP Altera */
+	li	t0, MEM_STCFG2
+	li	t1, 0x00000280 /* BE, EW */ 
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STTIME2
+	li	t1, 0x0303000c 
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STADDR2
+	li	t1, 0x10c03f80 /* 1 MB */
+	sw	t1, 0(t0)
+
+	/* RCE3 DP Altera */
+	li	t0, MEM_STCFG3
+	li	t1, 0x00000280 /* BE, EW */ 
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STTIME3
+	li	t1, 0x0303000c 
+	sw	t1, 0(t0)
+
+	li	t0, MEM_STADDR3
+	li	t1, 0x10e03f80 /* 1 MB */
+	sw	t1, 0(t0)
+
+	sync
+
+	/* Set peripherals to a known state */
+	li	t0, IC0_CFG0CLR
+	li	t1, 0xFFFFFFFF
+	sw	t1, 0(t0)
+
+	li	t0, IC0_CFG0CLR
+	sw	t1, 0(t0)
+
+	li	t0, IC0_CFG1CLR
+	sw	t1, 0(t0)
+
+	li	t0, IC0_CFG2CLR
+	sw	t1, 0(t0)
+
+	li	t0, IC0_SRCSET
+	sw	t1, 0(t0)
+
+	li	t0, IC0_ASSIGNSET
+	sw	t1, 0(t0)
+
+	li	t0, IC0_WAKECLR
+	sw	t1, 0(t0)
+
+	li	t0, IC0_RISINGCLR
+	sw	t1, 0(t0)
+
+	li	t0, IC0_FALLINGCLR
+	sw	t1, 0(t0)
+
+	li	t0, IC0_TESTBIT
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, IC1_CFG0CLR
+	li	t1, 0xFFFFFFFF
+	sw	t1, 0(t0)
+
+	li	t0, IC1_CFG0CLR
+	sw	t1, 0(t0)
+
+	li	t0, IC1_CFG1CLR
+	sw	t1, 0(t0)
+
+	li	t0, IC1_CFG2CLR
+	sw	t1, 0(t0)
+
+	li	t0, IC1_SRCSET
+	sw	t1, 0(t0)
+
+	li	t0, IC1_ASSIGNSET
+	sw	t1, 0(t0)
+
+	li	t0, IC1_WAKECLR
+	sw	t1, 0(t0)
+
+	li	t0, IC1_RISINGCLR
+	sw	t1, 0(t0)
+
+	li	t0, IC1_FALLINGCLR
+	sw	t1, 0(t0)
+
+	li	t0, IC1_TESTBIT
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, SYS_FREQCTRL0
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+	li	t0, SYS_FREQCTRL1
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+	li	t0, SYS_CLKSRC
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+	li	t0, SYS_PININPUTEN
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, 0xB1100100
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+	li	t0, 0xB1400100
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+
+	li	t0, SYS_WAKEMSK
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+	li	t0, SYS_WAKESRC
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+	/* wait 1mS before setup */
+	li	t1, MEM_1MS
+1:	add	t1, -1
+	bne	t1, zero, 1b
+	nop
+
+
+/* SDCS 0 SDRAM */
+	li	t0, MEM_SDMODE0
+	li	t1, 0x592CD1
+	sw	t1, 0(t0)
+
+	li	t0, MEM_SDMODE1
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+	li	t0, MEM_SDMODE2
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+/* 64 MB SDRAM at addr 0 */
+	li	t0, MEM_SDADDR0
+	li	t1, 0x001003F0
+	sw	t1, 0(t0)
+
+
+	li	t0, MEM_SDADDR1
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+	li	t0, MEM_SDADDR2
+	li	t1, 0x00000000
+	sw	t1, 0(t0)
+
+	sync
+
+	li	t0, MEM_SDREFCFG
+	li	t1, 0x880007A1 /* Disable */
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDPRECMD
+	sw	zero, 0(t0)
+	sync
+
+	li	t0, MEM_SDAUTOREF
+	sw	zero, 0(t0)
+	sync
+	sw	zero, 0(t0)
+	sync
+
+	li	t0, MEM_SDREFCFG
+	li	t1, 0x8A0007A1 /* Enable */
+	sw	t1, 0(t0)
+	sync
+
+	li	t0, MEM_SDWRMD0
+	li	t1, 0x00000023
+	sw	t1, 0(t0)
+	sync
+
+	/* wait 1mS after setup */
+	li	t1, MEM_1MS
+1:	add	t1, -1
+	bne	t1, zero, 1b
+	nop
+
+	/* Setup GPIO pins */
+
+	li	t0, SYS_PINFUNC
+	li	t1, 0x00007025 /* 0x8080 */
+	sw	t1, 0(t0)
+
+	li	t0, SYS_TRIOUTCLR
+	li	t1, 0xFFFFFFFF /* 0x1FFF */
+	sw	t1, 0(t0)
+
+	/* Turn yellow front led on */
+	/* Release reset on CF */
+	li	t0, SYS_OUTPUTCLR
+	li	t1, GPIO_RJ1LG
+	sw	t1, 0(t0)
+	li	t0, SYS_OUTPUTSET
+	li	t1, GPIO_RJ1LY|GPIO_CFRESET
+	sw	t1, 0(t0)
+	sync
+	j clearmem
+	nop
+
+	.globl	memtest
+memtest:
+	/* Fill memory with address */
+	li	t0, 0x80000000
+	li	t1, 0xFFF000 /* 64 MB */
+mt0:	sw	t0, 0(t0)
+	add	t1, -1
+	add	t0, 4
+	bne	t1, zero, mt0
+	nop
+	nop
+	/* Verify addr */
+	li	t0, 0x80000000
+	li	t1, 0xFFF000 /* 64 MB */
+mt1:	lw	t2, 0(t0)
+	bne	t0, t2, memhang	
+	add	t1, -1
+	add	t0, 4
+	bne	t1, zero, mt1
+	nop
+	nop
+	.globl	clearmem
+clearmem:		
+		/* Clear memory */
+	li	t0, 0x80000000
+	li	t1, 0xFFF000 /* 64 MB */
+mtc:	sw	zero, 0(t0)
+	add	t1, -1
+	add	t0, 4
+	bne	t1, zero, mtc
+	nop
+	nop
+memtestend:		
+	j	ra
+	nop
+	
+memhang:	
+	b	memhang
+	nop
diff --git a/board/gth2/u-boot.lds b/board/gth2/u-boot.lds
new file mode 100644
index 000000000..8ba0b6d4c
--- /dev/null
+++ b/board/gth2/u-boot.lds
@@ -0,0 +1,68 @@
+/*
+ * (C) Copyright 2003-2005
+ * Wolfgang Denk Engineering, <wd@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+OUTPUT_FORMAT("elf32-bigmips", "elf32-bigmips", "elf32-bigmips")
+*/
+OUTPUT_FORMAT("elf32-tradbigmips", "elf32-tradbigmips", "elf32-tradbigmips")
+OUTPUT_ARCH(mips)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x00000000;
+
+	. = ALIGN(4);
+	.text       :
+	{
+	  *(.text)
+	}
+
+	. = ALIGN(4);
+	.rodata  : { *(.rodata) }
+
+	. = ALIGN(4);
+	.data  : { *(.data) }
+
+	. = ALIGN(4);
+	.sdata  : { *(.sdata) }
+
+	_gp = ALIGN(16);
+
+	__got_start = .;
+	.got  : { *(.got) }
+	__got_end = .;
+
+	.sdata  : { *(.sdata) }
+
+	__u_boot_cmd_start = .;
+	.u_boot_cmd : { *(.u_boot_cmd) }
+	__u_boot_cmd_end = .;
+
+	uboot_end_data = .;
+	num_got_entries = (__got_end - __got_start) >> 2;
+
+	. = ALIGN(4);
+	.sbss  : { *(.sbss) }
+	.bss  : { *(.bss) }
+	uboot_end = .;
+}