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| author | Michal Simek <michal.simek@amd.com> | 2022-06-24 14:15:00 +0200 |
|---|---|---|
| committer | Michal Simek <michal.simek@amd.com> | 2022-06-24 14:15:00 +0200 |
| commit | b6fe10afe99c708a1dbb2d01be084aca32521651 (patch) | |
| tree | b334343a1f01382f027fd7aebe8b0a30e112c3c8 | |
| parent | 986727ca11425942807e226fe50c16e4b223a4e5 (diff) | |
| download | u-boot-b6fe10afe99c708a1dbb2d01be084aca32521651.zip u-boot-b6fe10afe99c708a1dbb2d01be084aca32521651.tar.gz u-boot-b6fe10afe99c708a1dbb2d01be084aca32521651.tar.bz2 | |
microblaze: Remove _start symbol handling at U-Boot start
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>
Link: https://lore.kernel.org/r/044b727c33dfbe662f68512d0da0775a4805f360.1655299267.git.michal.simek@amd.com
| -rw-r--r-- | arch/microblaze/cpu/start.S | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S index c3d925c..db3998f 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 */ |