upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/include/configs/purple.h

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/*
* (C) Copyright 2003
* 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
*/
/*
* This file contains the configuration parameters for the PURPLE board.
*/
#ifndef __CONFIG_H
#define __CONFIG_H
#define CONFIG_MIPS32 1 /* MIPS 5Kc CPU core */
#define CONFIG_PURPLE 1 /* on a PURPLE Board */
#define CPU_CLOCK_RATE 125000000 /* 125 MHz clock for the MIPS core */
#define ASC_CLOCK_RATE 62500000 /* 62.5 MHz ASC clock */
#define INFINEON_EBU_BOOTCFG 0xE0CC
#define CONFIG_STACKSIZE (128 * 1024)
#define CONFIG_BOOTDELAY 5 /* autoboot after 5 seconds */
#define CONFIG_BAUDRATE 19200
/* valid baudrates */
#define CFG_BAUDRATE_TABLE { 9600, 19200, 38400, 57600, 115200 }
#define CONFIG_TIMESTAMP /* Print image info with timestamp */
#define CONFIG_PREBOOT "echo;" \
"echo Type \"run flash_nfs\" to mount root filesystem over NFS;" \
"echo"
#undef CONFIG_BOOTARGS
#define CONFIG_EXTRA_ENV_SETTINGS \
"nfsargs=setenv bootargs root=/dev/nfs rw " \
"nfsroot=${serverip}:${rootpath}\0" \
"ramargs=setenv bootargs root=/dev/ram rw\0" \
"addip=setenv bootargs ${bootargs} " \
"ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}" \
":${hostname}:${netdev}:off\0" \
"addmisc=setenv bootargs ${bootargs} " \
"console=ttyS0,${baudrate} " \
"ethaddr=${ethaddr} " \
"panic=1\0" \
"flash_nfs=run nfsargs addip addmisc;" \
"bootm ${kernel_addr}\0" \
"flash_self=run ramargs addip addmisc;" \
"bootm ${kernel_addr} ${ramdisk_addr}\0" \
"net_nfs=tftp 80500000 ${bootfile};" \
"run nfsargs addip addmisc;bootm\0" \
"rootpath=/opt/eldk/mips_5KC\0" \
"bootfile=/tftpboot/purple/uImage\0" \
"kernel_addr=B0040000\0" \
"ramdisk_addr=B0100000\0" \
"u-boot=/tftpboot/purple/u-boot.bin\0" \
"load=tftp 80500000 ${u-boot}\0" \
"update=protect off 1:0-4;era 1:0-4;" \
"cp.b 80500000 B0000000 ${filesize}\0" \
""
#define CONFIG_BOOTCOMMAND "run flash_self"
/*
* BOOTP options
*/
#define CONFIG_BOOTP_BOOTFILESIZE
#define CONFIG_BOOTP_BOOTPATH
#define CONFIG_BOOTP_GATEWAY
#define CONFIG_BOOTP_HOSTNAME
/*
* Command line configuration.
*/
#include <config_cmd_default.h>
#define CONFIG_CMD_ELF
#define CFG_SDRAM_BASE 0x80000000
#define CFG_INIT_SP_OFFSET 0x400000
#define CFG_MALLOC_LEN 128*1024
#define CFG_BOOTPARAMS_LEN 128*1024
/*
* Miscellaneous configurable options
*/
#define CFG_LONGHELP /* undef to save memory */
#define CFG_PROMPT "PURPLE # " /* Monitor Command Prompt */
#define CFG_CBSIZE 256 /* Console I/O Buffer Size */
#define CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16) /* Print Buffer Size */
#define CFG_HZ (CPU_CLOCK_RATE/2)
#define CFG_MAXARGS 16 /* max number of command args*/
#define CFG_LOAD_ADDR 0x80500000 /* default load address */
#define CFG_MEMTEST_START 0x80200000
#define CFG_MEMTEST_END 0x80800000
#define CONFIG_MISC_INIT_R
/*-----------------------------------------------------------------------
* FLASH and environment organization
*/
#define CFG_MAX_FLASH_BANKS 1 /* max number of memory banks */
#define CFG_MAX_FLASH_SECT (35) /* max number of sectors on one chip */
#define PHYS_FLASH_1 0xb0000000 /* Flash Bank #1 */
/* The following #defines are needed to get flash environment right */
#define CFG_MONITOR_BASE TEXT_BASE
#define CFG_MONITOR_LEN (192 << 10)
#define CFG_FLASH_BASE PHYS_FLASH_1
/* timeout values are in ticks */
#define CFG_FLASH_ERASE_TOUT (6 * CFG_HZ) /* Timeout for Flash Erase */
#define CFG_FLASH_WRITE_TOUT (6 * CFG_HZ) /* Timeout for Flash Write */
#define CFG_ENV_IS_IN_FLASH 1
/* Address and size of Primary Environment Sector */
#define CFG_ENV_ADDR 0xB0008000
#define CFG_ENV_SIZE 0x4000
#define CONFIG_FLASH_32BIT
#define CONFIG_NR_DRAM_BANKS 1
#define CONFIG_PLB2800_ETHER
#define CONFIG_NET_MULTI
/*-----------------------------------------------------------------------
* Cache Configuration
*/
#define CFG_DCACHE_SIZE 16384
#define CFG_ICACHE_SIZE 16384
#define CFG_CACHELINE_SIZE 32
/*
* Temporary buffer for serial data until the real serial driver
* is initialised (memtest will destroy this buffer)
*/
#define CFG_SCONSOLE_ADDR (CFG_SDRAM_BASE + CFG_INIT_SP_OFFSET - \
CFG_DCACHE_SIZE / 2)
#define CFG_SCONSOLE_SIZE (CFG_DCACHE_SIZE / 4)
#endif /* __CONFIG_H */