diff options
Diffstat (limited to 'src/soc/intel/skylake/include/soc/smm.h')
| -rw-r--r-- | src/soc/intel/skylake/include/soc/smm.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/include/soc/smm.h b/src/soc/intel/skylake/include/soc/smm.h new file mode 100644 index 0000000000..f7f515cd9b --- /dev/null +++ b/src/soc/intel/skylake/include/soc/smm.h @@ -0,0 +1,73 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _BROADWELL_SMM_H_ +#define _BROADWELL_SMM_H_ + +#include <stdint.h> +#include <cpu/x86/msr.h> + +struct ied_header { + char signature[10]; + u32 size; + u8 reserved[34]; +} __attribute__ ((packed)); + +struct smm_relocation_params { + u32 smram_base; + u32 smram_size; + u32 ied_base; + u32 ied_size; + msr_t smrr_base; + msr_t smrr_mask; + msr_t emrr_base; + msr_t emrr_mask; + msr_t uncore_emrr_base; + msr_t uncore_emrr_mask; + /* The smm_save_state_in_msrs field indicates if SMM save state + * locations live in MSRs. This indicates to the CPUs how to adjust + * the SMMBASE and IEDBASE */ + int smm_save_state_in_msrs; +}; + +/* There is a bug in the order of Kconfig includes in that arch/x86/Kconfig + * is included after chipset code. This causes the chipset's Kconfig to be + * clobbered by the arch/x86/Kconfig if they have the same name. */ +static inline int smm_region_size(void) +{ + /* Make it 8MiB by default. */ + if (CONFIG_SMM_TSEG_SIZE == 0) + return (8 << 20); + return CONFIG_SMM_TSEG_SIZE; +} + +int smm_initialize(void); +void smm_relocate(void); + +/* These helpers are for performing SMM relocation. */ +void southbridge_trigger_smi(void); +void southbridge_clear_smi_status(void); + +/* The initialization of the southbridge is split into 2 components. One is + * for clearing the state in the SMM registers. The other is for enabling + * SMIs. They are split so that other work between the 2 actions. */ +void southbridge_smm_clear_state(void); +void southbridge_smm_enable_smi(void); + +#endif |