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microblaze: Disable stack protection from bootloader 

Microblaze without MMU can use stack protection in bootloader
and kernel should clear this setting ASAP.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2013-08-23 07:16:50 +02:00
parent 17578ea198
commit 34b9c07a3b
1 changed files with 4 additions and 0 deletions
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4
arch/microblaze/kernel/head.S
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@ -64,6 +64,10 @@ real_start:
#endif #endif
mts rmsr, r0 mts rmsr, r0
/* Disable stack protection from bootloader */
mts rslr, r0
addi r8, r0, 0xFFFFFFF
mts rshr, r8
/* /*
* According to Xilinx, msrclr instruction behaves like 'mfs rX,rpc' * According to Xilinx, msrclr instruction behaves like 'mfs rX,rpc'
* if the msrclr instruction is not enabled. We use this to detect * if the msrclr instruction is not enabled. We use this to detect