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microblaze: Support stack protection feature

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Ensure that stack didn't rewrite important part
of u-boot.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2014-11-04 13:30:14 +01:00
parent 822d43a6d9
commit da931af1b5
1 changed files with 4 additions and 0 deletions
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4
arch/microblaze/cpu/start.S
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@ -23,11 +23,15 @@ _start:
mts rmsr, r0 /* disable cache */
addi r8, r0, __end
mts rslr, r8
#if defined(CONFIG_SPL_BUILD)
addi r1, r0, CONFIG_SPL_STACK_ADDR
mts rshr, r1
addi r1, r1, -4 /* Decrement SP to top of memory */
#else
addi r1, r0, CONFIG_SYS_INIT_SP_OFFSET
mts rshr, r1
addi r1, r1, -4 /* Decrement SP to top of memory */
/* Find-out if u-boot is running on BIG/LITTLE endian platform