Hello,
I have this issue on my board which is a based from at91rm9200-ek board. I was able to boot the board from flash and also from using the 2009 version of uboot. On the other hand using newer version the 2013.07, i was unable to boot the board from flash but able to boot it from ram..
On both scenario, i just work on u-boot only and no kernel image yet. I am booting from flash during power on as my BMS = 0; no serial dataflash used.
Looking these two versions of u-boot, they have different folder structure so i suspect the two differ significantly in folder and file structure. Looking also the asm files, start.S and low_level_init.S the two versions have minor differences..
One difference is the use of TEXT_BASE and CONFIG_SYS_TEXT_BASE; I am a bit confused with the use of these two.
In the 2013.07 Version, here is what I did..
#ifdef CONFIG_RAMBOOT #define CONFIG_SKIP_LOWLEVEL_INIT #define CONFIG_SYS_TEXT_BASE 0x20100000 #else #define CONFIG_SYS_TEXT_BASE 0x10000000 #endif
What is the use of CONFIG_SYS_TEXT_BASE?
Scenarios on 2013.07 version
1) I tried to boot from RAM and i was successful; defining CONFIG_RAMBOOT; using the executable file u-boot, via gdb; lowlevel init is done outside u-boot 2) However, copying the u-boot.bin to flash and not defining CONFIG_RAMBOOT, I FAILED to boot from flash...
0x10000000 is the address of the flash memory for NCS0 which is if you want to boot here
I can send the affected files later on...
Thanks!
Chris