blob: 3452bada7a99746ff57afe28778dec8bceba8773 [file] [log] [blame]
Duncan Laurie26cf00a2018-10-14 02:39:46 +00001/*
2 * This file is part of the coreboot project.
3 *
4 * Copyright 2018 Google LLC
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 EC_GOOGLE_COMMON_MEC_H
17#define EC_GOOGLE_COMMON_MEC_H
18
19#include <stddef.h>
20#include <stdint.h>
21
22/* Indicate read or write from MEC IO region */
23enum mec_io_type {
24 MEC_IO_READ,
25 MEC_IO_WRITE
26};
27
28/*
29 * mec_io_bytes - Read / write bytes to MEC EMI port
30 *
31 * @type: Indicate read or write operation
32 * @base: Base address for MEC EMI region
33 * @offset: Base read / write address
34 * @buffer: Destination / source buffer
35 * @size: Number of bytes to read / write
36 *
37 * @returns 8-bit checksum of all bytes read or written
38 */
39
40uint8_t mec_io_bytes(enum mec_io_type type, uint16_t base,
41 uint16_t offset, void *buffer, size_t size);
42
43#endif /* EC_GOOGLE_COMMON_MEC_H */