Right now U-Boot runs all the time from the same address where it is loaded but going to full relocation code starting address doesn't need to be fixed and can be simply discovered from reading PC register. That's why use r20 to get PC address and subtract offset from the beginning to get starting address.
Signed-off-by: Michal Simek michal.simek@amd.com ---
arch/microblaze/cpu/start.S | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S index c3d925c1d151..db3998f54505 100644 --- a/arch/microblaze/cpu/start.S +++ b/arch/microblaze/cpu/start.S @@ -14,15 +14,16 @@ .global _start _start: mts rmsr, r0 /* disable cache */ + mfs r20, rpc + addi r20, r20, -4
mts rslr, r0 - addi r8, r0, _start - mts rshr, r8 + mts rshr, r20
#if defined(CONFIG_SPL_BUILD) addi r1, r0, CONFIG_SPL_STACK_ADDR #else - add r1, r0, r8 + add r1, r0, r20 #endif
addi r1, r1, -4 /* Decrement SP to top of memory */