src/include/cpu/intel/smm_reloc.h

/*
 * This file is part of the coreboot project.
 *
 * 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_SMM_RELOC_H__
#define __INTEL_SMM_RELOC_H__

#include <types.h>

struct ied_header {
	char signature[10];
	u32 size;
	u8 reserved[34];
} __packed;

/* These helpers are for performing SMM relocation. */
u32 northbridge_get_tseg_base(void);
u32 northbridge_get_tseg_size(void);
void northbridge_write_smram(u8 smram);

void smm_lock(void);
void smm_relocate(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 smm_southbridge_clear_state(void);
void smm_southbridge_enable_smi(void);
void smm_southbridge_enable(uint16_t pm1_events);

/* To be removed. */
void smm_initialize(void);
void smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, size_t *smm_save_state_size);
void smm_relocation_handler(int cpu, uintptr_t curr_smbase, uintptr_t staggered_smbase);

bool cpu_has_alternative_smrr(void);

#endif