Dear all:

I had a ARM platform which call DVTEST.

While booting, the platform (ROM code) will copy image from SD card to SDRAM base address (0x0).

So my TEXT_BASE address should be start from 0x00000000.

But I found all the ARM platforms in U-boot didn’t start from their SDRAM base address.

They also set up the stack pointer by growing up direction

/* Set up the stack */

stack_setup:

ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */

sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */

sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo */

My question is can I start U-boot from SDRAM base address (0x00000000)?

If so, how to change the stack direction? (GCC option or some else)

Please help me because this problem had confused me a lot of days.

Thanks.

Best Regards.

Richard