From 6a360048a1a4f8eaebbf9c4ec75fe4a9543421b2 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Thu, 13 Feb 2014 10:30:42 -0600 Subject: haswell: backup the default SMM region on resume Haswell CPUs need to use the default SMM region for relocating to the desired SMM location. Back up that memory on resume instead of reserving the default region. This makes the haswell support more forgiving to software which expects PC-compatible memory layouts. Change-Id: I9ae74f1f14fe07ba9a0027260d6e65faa6ea2aed Signed-off-by: Aaron Durbin Reviewed-on: http://review.coreboot.org/5217 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/cpu/intel/haswell/haswell_init.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'src/cpu/intel/haswell/haswell_init.c') diff --git a/src/cpu/intel/haswell/haswell_init.c b/src/cpu/intel/haswell/haswell_init.c index 7c9beed6d8..dc6012bced 100644 --- a/src/cpu/intel/haswell/haswell_init.c +++ b/src/cpu/intel/haswell/haswell_init.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include #include @@ -753,6 +754,7 @@ void bsp_init_and_start_aps(struct bus *cpu_bus) int max_cpus; int num_aps; const void *microcode_patch; + void *smm_save_area; /* Perform any necessary BSP initialization before APs are brought up. * This call also allows the BSP to prepare for any secondary effects @@ -761,6 +763,9 @@ void bsp_init_and_start_aps(struct bus *cpu_bus) microcode_patch = intel_microcode_find(); + /* Save default SMM area before relocation occurs. */ + smm_save_area = backup_default_smm_area(); + /* This needs to be called after the mtrr setup so the BSP mtrrs * can be mirrored by the APs. */ if (setup_ap_init(cpu_bus, &max_cpus, microcode_patch)) { @@ -782,6 +787,9 @@ void bsp_init_and_start_aps(struct bus *cpu_bus) /* After SMM relocation a 2nd microcode load is required. */ intel_microcode_load_unlocked(microcode_patch); + /* Restore the default SMM region. */ + restore_default_smm_area(smm_save_area); + /* Enable ROM caching if option was selected. */ x86_mtrr_enable_rom_caching(); } -- cgit v1.2.3