diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2018-06-25 14:22:27 -0600 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-06-27 22:11:11 +0000 |
| commit | dd549e117588472d11b10e0b1287a0e19377b844 (patch) | |
| tree | 9eba7c4af647c19091eeb80a0a53773e0d7dbe07 | |
| parent | c57a273d4ccc409e0ae52d8bd09e42d7c87e0aff (diff) | |
smm: Clear SMRAM when debugging
This makes it easier to spot unused RAM.
BUG=b:80539294
TEST=built and tested on grunt. Verified unused memory was set to 0xcdcdcdcd
Change-Id: I335eaf642bd8526f31819eaac95ce80c2df3c300
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/27227
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
| -rw-r--r-- | src/cpu/x86/smm/smm_module_loader.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/cpu/x86/smm/smm_module_loader.c b/src/cpu/x86/smm/smm_module_loader.c index 3d7952ff42..e92fa05e13 100644 --- a/src/cpu/x86/smm/smm_module_loader.c +++ b/src/cpu/x86/smm/smm_module_loader.c @@ -346,6 +346,10 @@ int smm_load_module(void *smram, size_t size, struct smm_loader_params *params) if (rmodule_parse(&_binary_smm_start, &smm_mod)) return -1; + /* Clear SMM region */ + if (IS_ENABLED(CONFIG_DEBUG_SMI)) + memset(smram, 0xcd, size); + total_stack_size = params->per_cpu_stack_size * params->num_concurrent_stacks; |