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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Google Inc.
* Copyright (C) 2015 Intel Corporation.
*
* 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.
*/
#ifndef _SOC_SMM_H_
#define _SOC_SMM_H_
#include <stdint.h>
#include <cpu/x86/msr.h>
#include <soc/intel/common/romstage.h>
#include <soc/intel/common/memmap.h>
#include <soc/gpio.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;
};
/* Mainboard handler for GPI SMIs*/
void mainboard_smi_gpi_handler(const struct gpi_status *sts);
#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.
*/
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
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