| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2015 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #ifndef _CBFS_H_ |
| #define _CBFS_H_ |
| |
| #include <commonlib/cbfs.h> |
| #include <program_loading.h> |
| |
| /*********************************************** |
| * Perform CBFS operations on the boot device. * |
| ***********************************************/ |
| |
| /* Return mapping of option ROM found in boot device. NULL on error. */ |
| void *cbfs_boot_map_optionrom(uint16_t vendor, uint16_t device); |
| /* Load stage by name into memory. Returns entry address on success. NULL on |
| * failure. */ |
| void *cbfs_boot_load_stage_by_name(const char *name); |
| /* Locate file by name and optional type. Return 0 on success. < 0 on error. */ |
| int cbfs_boot_locate(struct cbfsf *fh, const char *name, uint32_t *type); |
| /* Map file into memory leaking the mapping. Only should be used when |
| * leaking mappings are a no-op. Returns NULL on error, else returns |
| * the mapping and sets the size of the file. */ |
| void *cbfs_boot_map_with_leak(const char *name, uint32_t type, size_t *size); |
| |
| /* Load |in_size| bytes from |rdev| at |offset| to the |buffer_size| bytes |
| * large |buffer|, decompressing it according to |compression| in the process. |
| * Returns the decompressed file size, or 0 on error. |
| * LZMA files will be mapped for decompression. LZ4 files will be decompressed |
| * in-place with the buffer size requirements outlined in compression.h. */ |
| size_t cbfs_load_and_decompress(const struct region_device *rdev, size_t offset, |
| size_t in_size, void *buffer, size_t buffer_size, uint32_t compression); |
| |
| /* Load stage into memory filling in prog. Return 0 on success. < 0 on error. */ |
| int cbfs_prog_stage_load(struct prog *prog); |
| |
| /***************************************************************** |
| * Support structures and functions. Direct field access should * |
| * only be done by implementers of cbfs regions -- Not the above * |
| * API. * |
| *****************************************************************/ |
| |
| /* The cbfs_props struct describes the properties associated with a CBFS. */ |
| struct cbfs_props { |
| /* CBFS starts at the following offset within the boot region. */ |
| size_t offset; |
| /* CBFS size. */ |
| size_t size; |
| }; |
| |
| /* Return < 0 on error otherwise props are filled out accordingly. */ |
| int cbfs_boot_region_properties(struct cbfs_props *props); |
| |
| /* Allow external logic to take action prior to locating a program |
| * (stage or payload). */ |
| void cbfs_prepare_program_locate(void); |
| |
| /* Object used to identify location of current cbfs to use for cbfs_boot_* |
| * operations. It's used by cbfs_boot_region_properties() and |
| * cbfs_prepare_program_locate(). */ |
| struct cbfs_locator { |
| const char *name; |
| void (*prepare)(void); |
| /* Returns 0 on successful fill of cbfs properties. */ |
| int (*locate)(struct cbfs_props *props); |
| }; |
| |
| #endif |