icu862.h

AT91RM9200的完整启动代码：包括loader, boot及U-boot三部分均已编译通过！欢迎下载使用！

/*
 * (C) Copyright 2001-2002
 * Wolfgang Denk, DENX Software Engineering, [e-mail].
 *
 * 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
 */

/*
 * board/config.h - configuration options, board specific
 */

#ifndef __CONFIG_H
#define __CONFIG_H

#include <mpc8xx_irq.h>

/*
 * High Level Configuration Options
 * (easy to change)
 */
#define CONFIG_MPC860		1
#define CONFIG_MPC860T		1
#define CONFIG_ICU862		1
#define CONFIG_MPC862		1

#define	CONFIG_8xx_CONS_SMC1	1	/* Console is on SMC1		*/
#undef	CONFIG_8xx_CONS_SMC2
#undef	CONFIG_8xx_CONS_NONE
#define CONFIG_BAUDRATE		9600
#define CONFIG_LOADS_ECHO	1	/* echo on for serial download	*/

#ifdef CONFIG_100MHz
#define MPC8XX_FACT		24		/* Multiply by 24	*/
#define MPC8XX_XIN		4165000		/* 4.165 MHz in		*/
#define CONFIG_8xx_GCLK_FREQ	(MPC8XX_FACT * MPC8XX_XIN)
				    /* define if cant' use get_gclk_freq */
#else
#if 1				/* for 50MHz version of processor	*/
#define MPC8XX_FACT		12		/* Multiply by 12	*/
#define MPC8XX_XIN		4000000		/* 4 MHz in		*/
#define CONFIG_8xx_GCLK_FREQ	48000000 /* define if cant use get_gclk_freq */
#else				/* for 80MHz version of processor	*/
#define MPC8XX_FACT		20		/* Multiply by 20	*/
#define MPC8XX_XIN		4000000		/* 4 MHz in		*/
#define CONFIG_8xx_GCLK_FREQ    80000000 /* define if cant use get_gclk_freq */
#endif
#endif

#define CONFIG_CLOCKS_IN_MHZ	1	/* clocks passsed to Linux in MHz */

#if 0
#define CONFIG_BOOTDELAY	-1	/* autoboot disabled		*/
#else
#define CONFIG_BOOTDELAY	5	/* autoboot after 5 seconds	*/
#endif

#define CONFIG_PREBOOT	"echo;echo Type \"run flash_nfs\" to mount root filesystem over NFS;echo"

#undef	CONFIG_BOOTARGS
#define CONFIG_BOOTCOMMAND							\
	"bootp;" 								\
	"setenv bootargs root=/dev/nfs rw nfsroot=$(serverip):$(rootpath) " 	\
	"ip=$(ipaddr):$(serverip):$(gatewayip):$(netmask):$(hostname)::off;" 	\
	"bootm"

#undef	CONFIG_WATCHDOG			/* watchdog disabled		*/

#define	CONFIG_STATUS_LED	1	/* Status LED enabled		*/

#define CONFIG_BOOTP_MASK	(CONFIG_BOOTP_DEFAULT | CONFIG_BOOTP_BOOTFILESIZE)

#undef	CONFIG_SCC1_ENET		/* disable SCC1 ethernet */
#define	CONFIG_FEC_ENET		1	/* use FEC ethernet  */
#if 1
#define CFG_DISCOVER_PHY	1
#else
#undef	CFG_DISCOVER_PHY
#endif

#define CONFIG_MAC_PARTITION
#define CONFIG_DOS_PARTITION

/* enable I2C and select the hardware/software driver */
#undef  CONFIG_HARD_I2C			/* I2C with hardware support	*/
#define CONFIG_SOFT_I2C		1	/* I2C bit-banged		*/
# define CFG_I2C_SPEED		50000
# define CFG_I2C_SLAVE		0xFE
# define CFG_I2C_EEPROM_ADDR	0x50
# define CFG_I2C_EEPROM_ADDR_LEN 1	/* Bytes of address		*/
/*
 * Software (bit-bang) I2C driver configuration
 */
#define PB_SCL		0x00000020	/* PB 26 */
#define PB_SDA		0x00000010	/* PB 27 */

#define I2C_INIT	(immr->im_cpm.cp_pbdir |=  PB_SCL)
#define I2C_ACTIVE	(immr->im_cpm.cp_pbdir |=  PB_SDA)
#define I2C_TRISTATE	(immr->im_cpm.cp_pbdir &= ~PB_SDA)
#define I2C_READ	((immr->im_cpm.cp_pbdat & PB_SDA) != 0)
#define I2C_SDA(bit)	if(bit) immr->im_cpm.cp_pbdat |=  PB_SDA; \
			else    immr->im_cpm.cp_pbdat &= ~PB_SDA
#define I2C_SCL(bit)	if(bit) immr->im_cpm.cp_pbdat |=  PB_SCL; \
			else    immr->im_cpm.cp_pbdat &= ~PB_SCL
#define I2C_DELAY	udelay(5)	/* 1/4 I2C clock duration */

#define CFG_EEPROM_X40430		/* Use a Xicor X40430 EEPROM	*/
#define CFG_EEPROM_PAGE_WRITE_BITS  4	/* 16 bytes page write mode	*/

#define	CONFIG_RTC_MPC8xx		/* use internal RTC of MPC8xx	*/

#define CONFIG_COMMANDS	      ( CONFIG_CMD_DFL	| \
				CFG_CMD_ASKENV	| \
				CFG_CMD_DHCP	| \
				CFG_CMD_EEPROM	| \
				CFG_CMD_I2C	| \
				CFG_CMD_IDE	| \
				CFG_CMD_DATE	)

/* this must be included AFTER the definition of CONFIG_COMMANDS (if any) */
#include <cmd_confdefs.h>

/*
 * Miscellaneous configurable options
 */
#define	CFG_LONGHELP			/* undef to save memory		*/
#define	CFG_PROMPT	"=> "		/* Monitor Command Prompt	*/
#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
#define	CFG_CBSIZE	1024		/* Console I/O Buffer Size	*/
#else
#define	CFG_CBSIZE	256		/* Console I/O Buffer Size	*/
#endif
#define	CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16) /* Print Buffer Size */
#define	CFG_MAXARGS	16		/* max number of command args	*/
#define CFG_BARGSIZE	CFG_CBSIZE	/* Boot Argument Buffer Size	*/

#define CFG_MEMTEST_START	0x0100000	/* memtest works on	*/
#define CFG_MEMTEST_END		0x0400000	/* 1 ... 4 MB in DRAM	*/

#define CFG_LOAD_ADDR	 	0x00100000

#define	CFG_HZ		1000		/* decrementer freq: 1 ms ticks	*/

#define CFG_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200 }

/*
 * Low Level Configuration Settings
 * (address mappings, register initial values, etc.)
 * You should know what you are doing if you make changes here.
 */
/*-----------------------------------------------------------------------
 * Internal Memory Mapped Register
 */
#define CFG_IMMR		0xF0000000
#define CFG_IMMR_SIZE		((uint)(64 * 1024))

/*-----------------------------------------------------------------------
 * Definitions for initial stack pointer and data area (in DPRAM)
 */
#define CFG_INIT_RAM_ADDR	CFG_IMMR
#define	CFG_INIT_RAM_END	0x2F00	/* End of used area in DPRAM	*/
#define	CFG_GBL_DATA_SIZE	64  /* size in bytes reserved for initial data */
#define CFG_GBL_DATA_OFFSET	(CFG_INIT_RAM_END - CFG_GBL_DATA_SIZE)
#define	CFG_INIT_SP_OFFSET	CFG_GBL_DATA_OFFSET

/*-----------------------------------------------------------------------
 * Start addresses for the final memory configuration
 * (Set up by the startup code)
 * Please note that CFG_SDRAM_BASE _must_ start at 0
 */
#define	CFG_SDRAM_BASE		0x00000000
#define CFG_FLASH_BASE		0x40000000
#define CFG_FLASH_SIZE		((uint)(16 * 1024 * 1024))	/* max 16Mbyte */

#define CFG_RESET_ADDRESS	0xFFF00100

#if 0
#if defined(DEBUG)
#define	CFG_MONITOR_LEN		(256 << 10)	/* Reserve 256 kB for Monitor	*/
#else
#define	CFG_MONITOR_LEN		(192 << 10)	/* Reserve 192 kB for Monitor	*/
#endif
#else
#define CFG_MONITOR_LEN (272 << 10) /* Reserve 272 kB for Monitor */
#endif
#define CFG_MONITOR_BASE	TEXT_BASE
#define	CFG_MALLOC_LEN		(256 << 10)	/* Reserve 256 kB for malloc()	*/

/*
 * For booting Linux, the board info and command line data
 * have to be in the first 8 MB of memory, since this is
 * the maximum mapped by the Linux kernel during initialization.
 */
#define	CFG_BOOTMAPSZ		(8 << 20)	/* Initial Memory map for Linux	*/
/*-----------------------------------------------------------------------
 * FLASH organization
 */
#define CFG_MAX_FLASH_BANKS	1	/* max number of memory banks		*/
#define CFG_MAX_FLASH_SECT	64	/* max number of sectors on one chip	*/

#define CFG_FLASH_ERASE_TOUT	120000	/* Timeout for Flash Erase (in ms)	*/
#define CFG_FLASH_WRITE_TOUT	500		/* Timeout for Flash Write (in ms)	*/


#define	CFG_ENV_IS_IN_FLASH	1
#define CFG_ENV_OFFSET		0x00F40000

#define CFG_ENV_SECT_SIZE	0x40000	/* Total Size of Environment sector	*/
#define	CFG_ENV_SIZE		0x4000	/* Used Size of Environment Sector	*/

/*-----------------------------------------------------------------------
 * Cache Configuration
 */