| /* SPDX-License-Identifier: BSD-3-Clause */ |
| |
| #ifndef _BOOT_DEVICE_H |
| #define _BOOT_DEVICE_H |
| |
| #include <stddef.h> |
| |
| /** |
| * This is a boot device access function, which is used by libpayload to read data from |
| * the flash memory (or other boot device). It has to be implemented by payloads that want |
| * to use FMAP or libcbfs. |
| * |
| * @param buf The output buffer to which the data should be written to. |
| * @param offset Absolute offset in bytes of the requested boot device memory area. Not aligned. |
| * @param size Size in bytes of the requested boot device memory area. Not aligned. |
| * |
| * @returns Number of bytes returned to the buffer, or negative value on error. Typically should |
| * be equal to the `size`, and not aligned forcefully. |
| */ |
| ssize_t boot_device_read(void *buf, size_t offset, size_t size); |
| |
| #endif /* _BOOT_DEVICE_H */ |