1/* Copyright 2015 The Chromium OS Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 *
5 * This module provides some utility functions to use "flashrom" to read from
6 * and write to NOR flash.
7 */
8
9#ifndef VBOOT_REFERCENCE_CGPT_CGPT_NOR_H_
10#define VBOOT_REFERCENCE_CGPT_CGPT_NOR_H_
11
12// Obtain the MTD size from its sysfs node. |mtd_device| should point to
13// a dev node such as /dev/mtd0. This function returns 0 on success.
14int GetMtdSize(const char *mtd_device, uint64_t *size);
15
16// Exec |argv| in |cwd|. Return -1 on error, or exit code on success. |argv|
17// must be terminated with a NULL element as is required by execv().
18int ForkExecV(const char *cwd, const char *const argv[]);
19
20// Similar to ForkExecV but with a vararg instead of an array of pointers.
21int ForkExecL(const char *cwd, const char *cmd, ...);
22
23// Exec "rm" to remove |dir|.
24int RemoveDir(const char *dir);
25
26// Read RW_GPT from NOR flash to "rw_gpt" in a temp dir |temp_dir_template|.
27// |temp_dir_template| is passed to mkdtemp() so it must satisfy all
28// requirements by mkdtemp().
29int ReadNorFlash(char *temp_dir_template);
30
31// Write "rw_gpt" back to NOR flash. We write the file in two parts for safety.
32int WriteNorFlash(const char *dir);
33
34#endif  // VBOOT_REFERCENCE_CGPT_CGPT_NOR_H_
35