---------- 转发邮件信息 ---------- From:yeshi208@126.com Date:2007-04-29 13:07:04 Subject:[U-Boot-Users] A starter of por ting u-bo ot to a new boar d To:"eric miao"
Dear Eric: First, Thank you very much for your advice,and it is very important for me - A newer to u-boot. I have check my config.mk file , and I set TEXT_BASE = 0x30800000 there, It doesn't seem to be wrong, But I am not sure. So I will explan the situation of my board below , Please help me to find the reason , any suggestions are welcome:) The situations of my board: ======================================== 0x20000000---->2 chip norFlash(Intel TE28F160)--->2x2MB 0x30000000---->2 chip SDRAM(SAMSUNG K4S641632K-UC75)--->2x8MB
When powered on, the board remap 0x20000000(flash) to 0x00000000,so it can boot from flash, and In the procedure of cpu_init_crit which is in start.S,After initialize the EMI(external memory interface) and PMU(power management unit),I remap 0x30000000 to 0x00000000, then it relocate itself if needed.
In the config file , I defined: ========================================= #define CONFIG_NR_DRAM_BANKS 1 #define PHYS_SDRAM_1 0x30000000 #define PHYS_SDRAM_1_SIZE 0x01000000 /* 16 MB */ #define PHYS_FLASH_1 0x20000000 /* Flash Bank #1 */ #define PHYS_FLASH_SIZE 0x00400000 /* 2 MB */ #define CFG_FLASH_BASE PHYS_FLASH_1 /*----------------------------------------------------------------------- * FLASH organization */ #define CFG_MAX_FLASH_BANKS 1 /* max num of memory banks */ #define CFG_MAX_FLASH_SECT 39 /* max num of sects on one chip */ #define CFG_FLASH_ERASE_TOUT 240000 /* Flash Erase Timeout (in ms) */ #define CFG_FLASH_WRITE_TOUT 500 /* Flash Write Timeout (in ms) */
questions ================================================ And I still can not know what the 'bank' here mean. The above just modified from other code.
And I also definee CFG_LOAD_ADDR=0x30800000 /* default load address */ here. But I don't distinguish TEXT_BASE from CFG_LOAD_ADDR.
Looking forward for your replay:)
Best Wishes.
yeshi
免费试玩2006中国最佳网络游戏--梦幻西游