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| author | Michal Simek <michal.simek@amd.com> | 2022-06-24 14:14:59 +0200 |
|---|---|---|
| committer | Michal Simek <michal.simek@amd.com> | 2022-06-24 14:14:59 +0200 |
| commit | 16a18471bbdeb051d6905c1cba5a1bb84a2fbe49 (patch) | |
| tree | ce3ac78babf135e224e6fc6e64cf2c37a011c51a /arch/microblaze | |
| parent | 7cf236cf1f7d6b6aa2a860a1a80ad99df46b9144 (diff) | |
| download | u-boot-16a18471bbdeb051d6905c1cba5a1bb84a2fbe49.tar.gz | |
microblaze: Fix stack protection behavior
When U-Boot starts stack protection can be already enabled that's why setup
the lowest possible SLR value which is address 0. And the highest possible
stack in front of U-Boot. That's why you should never load U-Boot to the
beginning of DDR. There must be some space reserved. Code is using this
location for early malloc space, early global data and stack.
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/86b9748bad12142659804d6381bc6bbf20be44f1.1655299267.git.michal.simek@amd.com
Diffstat (limited to 'arch/microblaze')
| -rw-r--r-- | arch/microblaze/cpu/start.S | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/microblaze/cpu/start.S b/arch/microblaze/cpu/start.S index 9e00eef1f4..715ef37b39 100644 --- a/arch/microblaze/cpu/start.S +++ b/arch/microblaze/cpu/start.S @@ -15,8 +15,9 @@ _start: mts rmsr, r0 /* disable cache */ - addi r8, r0, _end - mts rslr, r8 + mts rslr, r0 + addi r8, r0, _start + mts rshr, r8 #if defined(CONFIG_SPL_BUILD) addi r1, r0, CONFIG_SPL_STACK_ADDR |