| /* |
| * 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 |
| * cloberred 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; |
| } |
| |
| #if IS_ENABLED(CONFIG_HAVE_SMI_HANDLER) |
| 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 compoments. 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); |
| #else /* CONFIG_HAVE_SMI_HANDLER */ |
| static inline int smm_initialize(void) { return 0; }; |
| static inline void smm_relocate(void) {} |
| static inline void southbridge_trigger_smi(void) {} |
| static inline void southbridge_clear_smi_status(void) {} |
| static inline void southbridge_smm_clear_state(void) {} |
| static inline void southbridge_smm_enable_smi(void) {} |
| #endif /* CONFIG_HAVE_SMI_HANDLER */ |
| |
| #endif |