src/include/smmstore.h

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2018 The Chromium OS Authors.  All rights reserved.
 *
 * 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 _SMMSTORE_H_
#define _SMMSTORE_H_

#include <stddef.h>
#include <stdint.h>

#define SMMSTORE_RET_SUCCESS 0
#define SMMSTORE_RET_FAILURE 1
#define SMMSTORE_RET_UNSUPPORTED 2

#define SMMSTORE_CMD_CLEAR 1
#define SMMSTORE_CMD_READ 2
#define SMMSTORE_CMD_APPEND 3

struct smmstore_params_read {
	void *buf;
	ssize_t bufsize;
};

struct smmstore_params_append {
	void *key;
	size_t keysize;
	void *val;
	size_t valsize;
};

/* SMM responder */
uint32_t smmstore_exec(uint8_t command, void *param);

/* implementation */
int smmstore_read_region(void *buf, ssize_t *bufsize);
int smmstore_append_data(void *key, uint32_t key_sz,
	void *value, uint32_t value_sz);
int smmstore_clear_region(void);
#endif