diff options
Diffstat (limited to 'src/soc/amd/common/block/cpu')
| -rw-r--r-- | src/soc/amd/common/block/cpu/Kconfig | 6 | ||||
| -rw-r--r-- | src/soc/amd/common/block/cpu/smm/Makefile.inc | 5 | ||||
| -rw-r--r-- | src/soc/amd/common/block/cpu/smm/smm_relocate.c | 49 |
3 files changed, 60 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/cpu/Kconfig b/src/soc/amd/common/block/cpu/Kconfig index c155975590..996605e7f3 100644 --- a/src/soc/amd/common/block/cpu/Kconfig +++ b/src/soc/amd/common/block/cpu/Kconfig @@ -28,6 +28,12 @@ config MEMLAYOUT_LD_FILE endif # SOC_AMD_COMMON_BLOCK_NONCAR +config SOC_AMD_COMMON_BLOCK_SMM + bool + default n + help + Add common SMM relocation and handler functionality to the build. + config SOC_AMD_COMMON_BLOCK_TSC_FAM17H_19H bool select COLLECT_TIMESTAMPS_NO_TSC # selected use SoC-specific timestamp function diff --git a/src/soc/amd/common/block/cpu/smm/Makefile.inc b/src/soc/amd/common/block/cpu/smm/Makefile.inc new file mode 100644 index 0000000000..0639890207 --- /dev/null +++ b/src/soc/amd/common/block/cpu/smm/Makefile.inc @@ -0,0 +1,5 @@ +ifeq ($(CONFIG_SOC_AMD_COMMON_BLOCK_SMM),y) + +ramstage-y += smm_relocate.c + +endif # CONFIG_SOC_AMD_COMMON_BLOCK_SMM diff --git a/src/soc/amd/common/block/cpu/smm/smm_relocate.c b/src/soc/amd/common/block/cpu/smm/smm_relocate.c new file mode 100644 index 0000000000..1d7cc68d68 --- /dev/null +++ b/src/soc/amd/common/block/cpu/smm/smm_relocate.c @@ -0,0 +1,49 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <amdblocks/smm.h> +#include <console/console.h> +#include <cpu/amd/amd64_save_state.h> +#include <cpu/amd/msr.h> +#include <cpu/cpu.h> +#include <cpu/x86/msr.h> +#include <cpu/x86/smm.h> +#include <types.h> + +static struct smm_relocation_params smm_reloc_params; + +static void fill_in_relocation_params(struct smm_relocation_params *params) +{ + uintptr_t tseg_base; + size_t tseg_size; + + smm_region(&tseg_base, &tseg_size); + + params->tseg_base.lo = ALIGN_DOWN(tseg_base, 128 * KiB); + params->tseg_base.hi = 0; + params->tseg_mask.lo = ALIGN_DOWN(~(tseg_size - 1), 128 * KiB); + params->tseg_mask.hi = ((1 << (cpu_phys_address_size() - 32)) - 1); + + params->tseg_mask.lo |= SMM_TSEG_WB; +} + +void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, size_t *smm_save_state_size) +{ + printk(BIOS_DEBUG, "Setting up SMI for CPU\n"); + + fill_in_relocation_params(&smm_reloc_params); + + smm_subregion(SMM_SUBREGION_HANDLER, perm_smbase, perm_smsize); + *smm_save_state_size = sizeof(amd64_smm_state_save_area_t); +} + +void smm_relocation_handler(int cpu, uintptr_t curr_smbase, uintptr_t staggered_smbase) +{ + struct smm_relocation_params *relo_params = &smm_reloc_params; + amd64_smm_state_save_area_t *smm_state; + + wrmsr(SMM_ADDR_MSR, relo_params->tseg_base); + wrmsr(SMM_MASK_MSR, relo_params->tseg_mask); + + smm_state = (void *)(SMM_AMD64_SAVE_STATE_OFFSET + curr_smbase); + smm_state->smbase = staggered_smbase; +} |