microblaze: Add comment about reset location
Better to add comment to explain why reset vector points all the time to
origin U-Boot location.
If reset happens U-Boot should start from it's origin location.
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/5ca6341b7487708247fe2948d7e496ea6f7c2e02.1655299267.git.michal.simek@amd.com
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S
index db3998f..9aa5fd0 100644
--- a/arch/microblaze/cpu/start.S
+++ b/arch/microblaze/cpu/start.S
@@ -144,6 +144,7 @@
swi r3, r4, 0x4 /* reset address - brai opcode */
addik r6, r0, _start
+ /* Intentionally keep reset vector back to origin u-boot location */
sw r6, r1, r0
lhu r7, r1, r10
rsubi r8, r10, 0x2