Hi zhenhua:
After power up board, CPU will execute the instruction store at 0x0 (ROM flash), and I download u-boot to ROM flash (start from 0x0) so that the instruction store at 0x0 is "a0f00000: ea000014 b a0f00058 <reset>"
Then program will jump to 0xa0f00058 (SDRAM). However there shall be nothing inSDRAM, because board just powered up.
I wang to know how u-boot work after power up and TEXT_BASE is in SDRAM. (My board is fresh and no bootloader in board)
On Sun, 2008-12-14 at 18:26 +0800, zhenhua lin wrote:
However there is nothing at a0f00058 after power up board, so that
system hang up. (I download u-boot to ROM flash)
Why? Do you change the map to relocate the callee? Please Check the callee whether is it at the right position.
2008/12/14 王睿 wangr.bupt@gmail.com:
Hi everyone:
I am a freshman in U-boot development. My question to all expert is:
I set TEXT_BASE=0xA0f00000 in board/LPC2468OEM_Board/config.mk.
After compile, the first instruction is: a0f00000: ea000014 b a0f00058 <reset>
However there is nothing at a0f00058 after power up board, so that system hang up. (I download u-boot to ROM flash)
Can anyone explain that how u-boot boot after power up and what shall I do to make u-boot work right?
Thanks very much.
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