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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-04-21 08:43:09 +0300 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2017-08-19 15:31:51 +0000 |
| commit | 2e50142f62c20c437100ac3a1a1a50720a31a9d6 (patch) | |
| tree | c704bd5afb96170069561364359b42e236ad89fb /src/southbridge/intel/i82801dx/smi.c | |
| parent | 0cc2ce432771a2625214973c471461e7df9c4a12 (diff) | |
| download | coreboot-2e50142f62c20c437100ac3a1a1a50720a31a9d6.tar.xz | |
i82801dx/gx/ix/jx: Add low-memory backup for S3 path
SMM relocation code overwrite low memory owned by OS.
Change-Id: Ifa3d28bed3d3db65b0707bde62ae2b424a231f1a
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/19405
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/southbridge/intel/i82801dx/smi.c')
| -rw-r--r-- | src/southbridge/intel/i82801dx/smi.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801dx/smi.c b/src/southbridge/intel/i82801dx/smi.c index 93e28452e0..945fcf2db8 100644 --- a/src/southbridge/intel/i82801dx/smi.c +++ b/src/southbridge/intel/i82801dx/smi.c @@ -18,6 +18,7 @@ #include <device/device.h> #include <device/pci.h> #include <console/console.h> +#include <arch/acpi.h> #include <arch/io.h> #include <cpu/cpu.h> #include <cpu/x86/cache.h> @@ -229,6 +230,7 @@ static void smi_set_eos(void) } extern uint8_t smm_relocation_start, smm_relocation_end; +static void *default_smm_area = NULL; static void smm_relocate(void) { @@ -246,6 +248,8 @@ static void smm_relocate(void) return; } + default_smm_area = backup_default_smm_area(); + /* copy the SMM relocation code */ memcpy((void *)0x38000, &smm_relocation_start, &smm_relocation_end - &smm_relocation_start); @@ -339,6 +343,11 @@ void smm_init(void) smi_set_eos(); } +void smm_init_completion(void) +{ + restore_default_smm_area(default_smm_area); +} + void smm_lock(void) { /* LOCK the SMM memory window and enable normal SMM. |