walnut.h

uboot详细解读可用启动引导LINUX2.6内核

/*
 * (C) Copyright 2000-2005
 * Stefan Roese, 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

/*
 * High Level Configuration Options
 * (easy to change)
 */

#define CONFIG_405GP		1	/* This is a PPC405 CPU		*/
#define CONFIG_4xx		1	/* ...member of PPC4xx family	*/
#define CONFIG_WALNUT		1	/* ...on a WALNUT board		*/
					/* ...and on a SYCAMORE board	*/

/*
 * Include common defines/options for all AMCC eval boards
 */
#define CONFIG_HOSTNAME		walnut
#include "amcc-common.h"

#define CONFIG_BOARD_EARLY_INIT_F 1	/* Call board_early_init_f	*/

#define CONFIG_SYS_CLK_FREQ	33333333 /* external frequency to pll	*/

/*
 * Default environment variables
 */
#define	CONFIG_EXTRA_ENV_SETTINGS					\
	CONFIG_AMCC_DEF_ENV						\
	CONFIG_AMCC_DEF_ENV_POWERPC					\
	CONFIG_AMCC_DEF_ENV_PPC_OLD					\
	CONFIG_AMCC_DEF_ENV_NOR_UPD					\
	"kernel_addr=fff80000\0"					\
	"ramdisk_addr=fff80000\0"					\
	""

#define CONFIG_PHY_ADDR		1	/* PHY address			*/
#define CONFIG_HAS_ETH0		1

#define CONFIG_RTC_DS174x	1	/* use DS1743 RTC in Walnut	*/

/*
 * Commands additional to the ones defined in amcc-common.h
 */
#define CONFIG_CMD_DATE
#define CONFIG_CMD_PCI
#define CONFIG_CMD_SDRAM
#define CONFIG_CMD_SNTP

#define CONFIG_SPD_EEPROM      1       /* use SPD EEPROM for setup    */

/*
 * If CFG_EXT_SERIAL_CLOCK, then the UART divisor is 1.
 * If CFG_405_UART_ERRATA_59, then UART divisor is 31.
 * Otherwise, UART divisor is determined by CPU Clock and CFG_BASE_BAUD value.
 * The Linux BASE_BAUD define should match this configuration.
 *    baseBaud = cpuClock/(uartDivisor*16)
 * If CFG_405_UART_ERRATA_59 and 200MHz CPU clock,
 * set Linux BASE_BAUD to 403200.
 */
#undef	CONFIG_SERIAL_SOFTWARE_FIFO
#undef	CFG_EXT_SERIAL_CLOCK	       /* external serial clock */
#undef	CFG_405_UART_ERRATA_59	       /* 405GP/CR Rev. D silicon */
#define CFG_BASE_BAUD	    691200

/*-----------------------------------------------------------------------
 * I2C stuff
 *-----------------------------------------------------------------------
 */
#define CFG_I2C_SPEED		400000	/* I2C speed and slave address	*/

#define CFG_I2C_MULTI_EEPROMS
#define CFG_I2C_EEPROM_ADDR	(0xa8>>1)
#define CFG_I2C_EEPROM_ADDR_LEN 1
#define CFG_EEPROM_PAGE_WRITE_ENABLE
#define CFG_EEPROM_PAGE_WRITE_BITS 3
#define CFG_EEPROM_PAGE_WRITE_DELAY_MS 10

/*-----------------------------------------------------------------------
 * PCI stuff
 *-----------------------------------------------------------------------
 */
#define PCI_HOST_ADAPTER 0		/* configure ar pci adapter	*/
#define PCI_HOST_FORCE	1		/* configure as pci host	*/
#define PCI_HOST_AUTO	2		/* detected via arbiter enable	*/

#define CONFIG_PCI			/* include pci support		*/
#define CONFIG_PCI_HOST PCI_HOST_FORCE	/* select pci host function	*/
#define CONFIG_PCI_PNP			/* do pci plug-and-play		*/
					/* resource configuration	*/
#define CONFIG_PCI_SCAN_SHOW		/* show pci devices on startup	*/

#define CFG_PCI_SUBSYS_VENDORID 0x10e8	/* AMCC */
#define CFG_PCI_SUBSYS_DEVICEID 0xcafe	/* Whatever */
#define CFG_PCI_PTM1LA	0x00000000	/* point to sdram		*/
#define CFG_PCI_PTM1MS	0x80000001	/* 2GB, enable hard-wired to 1	*/
#define CFG_PCI_PTM1PCI 0x00000000	/* Host: use this pci address	*/
#define CFG_PCI_PTM2LA	0x00000000	/* disabled			*/
#define CFG_PCI_PTM2MS	0x00000000	/* disabled			*/
#define CFG_PCI_PTM2PCI 0x04000000	/* Host: use this pci address	*/

/*-----------------------------------------------------------------------
 * Start addresses for the final memory configuration
 * (Set up by the startup code)
 */
#define CFG_FLASH_BASE		0xFFF80000

/*
 * Define here the location of the environment variables (FLASH or NVRAM).
 * Note: DENX encourages to use redundant environment in FLASH. NVRAM is only
 *	 supported for backward compatibility.
 */
#if 1
#define CFG_ENV_IS_IN_FLASH	1	/* use FLASH for environment vars	*/
#else
#define CFG_ENV_IS_IN_NVRAM	1	/* use NVRAM for environment vars	*/
#endif

/*-----------------------------------------------------------------------
 * FLASH organization
 */
#define FLASH_BASE0_PRELIM	CFG_FLASH_BASE	/* FLASH bank #0		*/
#define FLASH_BASE1_PRELIM	0		/* FLASH bank #1		*/

#define CFG_MAX_FLASH_BANKS	1	/* max number of memory banks		*/
#define CFG_MAX_FLASH_SECT	256	/* 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_FLASH_EMPTY_INFO		/* print 'E' for empty sector on flinfo */

#define CFG_FLASH_ADDR0		0x5555
#define CFG_FLASH_ADDR1		0x2aaa
#define CFG_FLASH_WORD_SIZE	unsigned char

#ifdef CFG_ENV_IS_IN_FLASH
#define CFG_ENV_SECT_SIZE	0x10000		/* size of one complete sector	*/
#define CFG_ENV_ADDR		(CFG_MONITOR_BASE-CFG_ENV_SECT_SIZE)
#define CFG_ENV_SIZE		0x4000	/* Total Size of Environment Sector	*/

/* Address and size of Redundant Environment Sector	*/
#define CFG_ENV_ADDR_REDUND	(CFG_ENV_ADDR-CFG_ENV_SECT_SIZE)
#define CFG_ENV_SIZE_REDUND	(CFG_ENV_SIZE)
#endif /* CFG_ENV_IS_IN_FLASH */

/*-----------------------------------------------------------------------
 * NVRAM organization
 */
#define CFG_NVRAM_BASE_ADDR	0xf0000000	/* NVRAM base address	*/
#define CFG_NVRAM_SIZE		0x1ff8		/* NVRAM size	*/

#ifdef CFG_ENV_IS_IN_NVRAM
#define CFG_ENV_SIZE		0x1000		/* Size of Environment vars	*/
#define CFG_ENV_ADDR		\
	(CFG_NVRAM_BASE_ADDR+CFG_NVRAM_SIZE-CFG_ENV_SIZE)	/* Env	*/
#endif

/*-----------------------------------------------------------------------
 * External Bus Controller (EBC) Setup
 */

/* Memory Bank 0 (Flash Bank 0) initialization					*/
#define CFG_EBC_PB0AP		0x9B015480
#define CFG_EBC_PB0CR		0xFFF18000  /* BAS=0xFFF,BS=1MB,BU=R/W,BW=8bit	*/

#define CFG_EBC_PB1AP		0x02815480
#define CFG_EBC_PB1CR		0xF0018000  /* BAS=0xF00,BS=1MB,BU=R/W,BW=8bit	*/

#define CFG_EBC_PB2AP		0x04815A80
#define CFG_EBC_PB2CR		0xF0118000  /* BAS=0xF01,BS=1MB,BU=R/W,BW=8bit	*/

#define CFG_EBC_PB3AP		0x01815280
#define CFG_EBC_PB3CR		0xF0218000  /* BAS=0xF02,BS=1MB,BU=R/W,BW=8bit	*/

#define CFG_EBC_PB7AP		0x01815280
#define CFG_EBC_PB7CR		0xF0318000  /* BAS=0xF03,BS=1MB,BU=R/W,BW=8bit	*/

/*-----------------------------------------------------------------------
 * External peripheral base address
 *-----------------------------------------------------------------------
 */
#define CFG_KEY_REG_BASE_ADDR	0xF0100000
#define CFG_IR_REG_BASE_ADDR	0xF0200000
#define CFG_FPGA_REG_BASE_ADDR	0xF0300000

/*-----------------------------------------------------------------------
 * Definitions for initial stack pointer and data area
 */
#define CFG_INIT_DCACHE_CS	4	/* use cs # 4 for data cache memory    */

#define CFG_INIT_RAM_ADDR	0x40000000  /* inside of SDRAM			   */
#define CFG_INIT_RAM_END	0x2000	/* End of used area in RAM	       */
#define CFG_GBL_DATA_SIZE      128  /* 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

/*-----------------------------------------------------------------------
 * Definitions for Serial Presence Detect EEPROM address
 * (to get SDRAM settings)
 */
#define SPD_EEPROM_ADDRESS	0x50

#endif	/* __CONFIG_H */