src/include/smmstore.h

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2018 The Chromium OS Authors.  All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #ifndef _SMMSTORE_H_
  17 #define _SMMSTORE_H_
  18
  19 #include <stddef.h>
  20 #include <stdint.h>
  21
  22 #define SMMSTORE_APM_CNT 0xed
  23
  24 #define SMMSTORE_RET_SUCCESS 0
  25 #define SMMSTORE_RET_FAILURE 1
  26 #define SMMSTORE_RET_UNSUPPORTED 2
  27
  28 #define SMMSTORE_CMD_CLEAR 1
  29 #define SMMSTORE_CMD_READ 2
  30 #define SMMSTORE_CMD_APPEND 3
  31
  32 struct smmstore_params_read {
  33         void *buf;
  34         ssize_t bufsize;
  35 };
  36
  37 struct smmstore_params_append {
  38         void *key;
  39         size_t keysize;
  40         void *val;
  41         size_t valsize;
  42 };
  43
  44 /* SMM responder */
  45 uint32_t smmstore_exec(uint8_t command, void *param);
  46
  47 /* implementation */
  48 int smmstore_read_region(void *buf, ssize_t *bufsize);
  49 int smmstore_append_data(void *key, uint32_t key_sz,
  50         void *value, uint32_t value_sz);
  51 int smmstore_clear_region(void);
  52 #endif