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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 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.
*/
#ifndef _INTEL_COMMON_SMI_H_
#define _INTEL_COMMON_SMI_H_
/*
* The register value is used with get_reg and set_reg
*/
enum smm_reg {
RAX,
RBX,
RCX,
RDX,
};
struct smm_save_state_ops {
/* return io_misc_info from SMM Save State Area */
uint32_t (*get_io_misc_info)(void *state);
/* return value of the requested register from
* SMM Save State Area
*/
uint64_t (*get_reg)(void *state, enum smm_reg reg);
void (*set_reg)(void *state, enum smm_reg reg, uint64_t val);
};
typedef void (*smi_handler_t)(const struct smm_save_state_ops *save_state_ops);
/*
* SOC SMI Handler has to provide this structure which has methods to access
* the SOC specific SMM Save State Area
*/
const struct smm_save_state_ops *get_smm_save_state_ops(void);
/*
* southbridge_smi should be defined inside SOC specific code and should have
* handlers for any SMI events that need to be handled. Default handlers
* for some SMI events are provided in soc/intel/common/smihandler.c
*/
extern const smi_handler_t southbridge_smi[32];
/*
* This function should be implemented in SOC specific code to handle
* the SMI event on SLP_EN. The default functionality is provided in
* soc/intel/common/smihandler.c
*/
void southbridge_smi_sleep(const struct smm_save_state_ops *save_state_ops);
/*
* This function should be implemented in SOC specific code to handle
* SMI_APM event. The default functionality is provided in
* soc/intel/common/smihandler.c
*/
void southbridge_smi_apmc(const struct smm_save_state_ops *save_state_ops);
/*
* This function should be implemented in SOC specific code to handle
* SMI_PM1 event. The default functionality is provided in
* soc/intel/common/smihandler.c
*/
void southbridge_smi_pm1(const struct smm_save_state_ops *save_state_ops);
/*
* This function should be implemented in SOC specific code to handle
* SMI_GPE0 event. The default functionality is provided in
* soc/intel/common/smihandler.c
*/
void southbridge_smi_gpe0(const struct smm_save_state_ops *save_state_ops);
/*
* This function should be implemented in SOC specific code to handle
* SMI_TCO event. The default functionality is provided in
* soc/intel/common/smihandler.c
*/
void southbridge_smi_tco(const struct smm_save_state_ops *save_state_ops);
/*
* This function should be implemented in SOC specific code to handle
* SMI PERIODIC_STS event. The default functionality is provided in
* soc/intel/common/smihandler.c
*/
void southbridge_smi_periodic(const struct smm_save_state_ops *save_state_ops);
/*
* This function returns a 1 or 0 depending on whether disable_busmaster
* needs to be done for the specified device on S5 entry
*/
int smm_disable_busmaster(device_t dev);
/*
* Returns gnvs pointer within SMM context
*/
struct global_nvs_t *smm_get_gnvs(void);
extern const struct smm_save_state_ops em64t100_smm_ops;
extern const struct smm_save_state_ops em64t101_smm_ops;
#endif
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