1 /* Copyright 2015 The ChromiumOS Authors 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_REFERENCE_CGPT_NOR_H_ 10 #define VBOOT_REFERENCE_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. 14 int 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(). 18 int ForkExecV(const char *cwd, const char *const argv[]); 19 20 // Similar to ForkExecV but with a vararg instead of an array of pointers. 21 int ForkExecL(const char *cwd, const char *cmd, ...); 22 23 // Exec "rm" to remove |dir|. 24 int RemoveDir(const char *dir); 25 26 // Read RW_GPT from NOR flash to "rw_gpt" in dir. 27 int ReadNorFlash(const char *dir); 28 29 // Write "rw_gpt" back to NOR flash. We write the file in two parts for safety. 30 int WriteNorFlash(const char *dir); 31 32 #endif /* VBOOT_REFERENCE_CGPT_NOR_H_ */ 33