diff options
| -rw-r--r-- | src/arch/x86/include/arch/romstage.h | 9 | ||||
| -rw-r--r-- | src/arch/x86/postcar_loader.c | 18 |
2 files changed, 27 insertions, 0 deletions
diff --git a/src/arch/x86/include/arch/romstage.h b/src/arch/x86/include/arch/romstage.h index 2ac225875f..15c93f24bd 100644 --- a/src/arch/x86/include/arch/romstage.h +++ b/src/arch/x86/include/arch/romstage.h @@ -88,4 +88,13 @@ void run_postcar_phase(struct postcar_frame *pcf); */ void late_car_teardown(void); +/* + * Cache the TSEG region at the top of ram. This region is + * not restricted to SMM mode until SMM has been relocated. + * By setting the region to cacheable it provides faster access + * when relocating the SMM handler as well as using the TSEG + * region for other purposes. + */ +void postcar_enable_tseg_cache(struct postcar_frame *pcf); + #endif /* __ARCH_ROMSTAGE_H__ */ diff --git a/src/arch/x86/postcar_loader.c b/src/arch/x86/postcar_loader.c index 10a9ca2ace..c6149ab26a 100644 --- a/src/arch/x86/postcar_loader.c +++ b/src/arch/x86/postcar_loader.c @@ -17,6 +17,7 @@ #include <cpu/cpu.h> #include <cpu/x86/msr.h> #include <cpu/x86/mtrr.h> +#include <cpu/x86/smm.h> #include <program_loading.h> #include <rmodule.h> #include <romstage_handoff.h> @@ -187,6 +188,23 @@ static void load_postcar_cbfs(struct prog *prog, struct postcar_frame *pcf) stage_cache_add(STAGE_POSTCAR, prog); } +/* + * Cache the TSEG region at the top of ram. This region is + * not restricted to SMM mode until SMM has been relocated. + * By setting the region to cacheable it provides faster access + * when relocating the SMM handler as well as using the TSEG + * region for other purposes. + */ +void postcar_enable_tseg_cache(struct postcar_frame *pcf) +{ + uintptr_t smm_base; + size_t smm_size; + + smm_region(&smm_base, &smm_size); + postcar_frame_add_mtrr(pcf, smm_base, smm_size, + MTRR_TYPE_WRBACK); +} + void run_postcar_phase(struct postcar_frame *pcf) { struct prog prog = |