hi ,all. I cannot use the nand flash, so i decide to load the uboot through UART,and it works. but it seems not stable , when i type help or printenv(or use the autoboot delay, see followings), it will restart. but command "boot" or "setenv"(when i uncomment autoboot delay) are ok. I don't have a emulator,and don't know how it goes. I guess it is the ENV cause the problem,here are the macro i defined:
#if 0 #define CONFIG_SYS_USE_NAND #define CFG_DAVINCI_STD_NAND_LAYOUT //#define CONFIG_SYS_NAND_PAGE_2K
#define CONFIG_NAND_DAVINCI #undef CONFIG_ENV_IS_IN_FLASH #define CONFIG_SYS_NO_FLASH #define CONFIG_ENV_IS_IN_NAND /* U-Boot env in NAND Flash */ //#define CONFIG_ENV_SECT_SIZE 0x40000 /* Env sector Size */ #define CONFIG_ENV_OFFSET 0x30000 /* environment starts here*/ #endif
#define CONFIG_SYS_NO_FLASH #define CONFIG_ENV_IS_NOWHERE /*env readonly*/ #define CONFIG_ENV_IS_IN_NVRAM #define CONFIG_ENV_ADDR 0x82000000 #define CONFIG_ENV_SIZE SZ_16K //#define CONFIG_ENV_SIZE SZ_256K
#define CONFIG_SYS_NAND_BASE 0x02000000 //#define CONFIG_SYS_NAND_HW_ECC //#define CFG_DAVINCI_STD_NAND_LAYOUT //#define CONFIG_SYS_NAND_4BIT_HW_ECC //#define CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST /**/ #define CONFIG_SYS_MAX_NAND_DEVICE 1 /* Max number of NAND devices=2 */ #define CONFIG_MASK_CLE 0x10 / #define CONFIG_MASK_ALE 0x08
#define CONFIG_SYS_NAND_BASE_LIST {CONFIG_SYS_NAND_BASE,CONFIG_SYS_NAND_BASE + 0x4000}
#define CONFIG_SKIP_LOWLEVEL_INIT /* U-Boot is loaded by a bootloader */ #define CONFIG_SKIP_RELOCATE_UBOOT /* to a proper address, init done */ #define DEF_BOOTM ""
/////////////////////////////and here is the output:////////////////// DM3xx=>>: U-Boot 2009.03 ( 7??? 15 2010 - 14:12:54) DM3xx=>>: I2C: ready DM3xx=>>: DRAM: 128 MB DM3xx=>>: NOT ENV_IS_EMBEDDED DM3xx=>>: Using default environment DM3xx=>>: In: serial DM3xx=>>: Out: serial DM3xx=>>: Err: serial DM3xx=>>: ARM Clock :- 216MHz DM3xx=>>: DDR Clock :- 171MHz DM3xx=>>: MTD Layout: DM3xx=>>: UBL=0x0000-0x3FFF(16KB),Uboot=0x4000-0x33FFF(176+env.16KB) DM3xx=>>: Kernel=0x34000-0x2B3FFF(2.5MB),FS=0x2B4000-0x3FFFFFF (61.2MB
DM3xx=>>: Hit any key to stop autoboot: 3 BOOTME DM3xx=>>: BOOTME DM3xx=>>: BOOTME DM3xx=>>: BOOTME DM3xx=>>: BOOTME ........ and then it comes to the reboot procedure .BOOTME is the first string when boot from UART.
/////////////////so i comment some code int static __inline__ int abortboot(int bootdelay): #if 0 while ((bootdelay > 0) && (!abort)) { int i;
--bootdelay; /* delay 100 * 10ms */ for (i=0; !abort && i<100; ++i) { if (tstc()) { /* we got a key press */ abort = 1; /* don't auto boot */ bootdelay = 0; /* no more delay */ #ifdef CONFIG_MENUKEY menukey = getc(); #else (void) getc(); /* consume input */ #endif break; } //if udelay(10000); } //for
printf("\b\b\b%2d ", bootdelay); }//end while #endif
///////////////// now it will not restart anymore. but when i type help or printenv ,it will restart again. WHY? anyone can show me how to define the env when not using nand or nor flash?
regards!