/* * 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 a struct file from CBFS into a buffer. Returns amount of loaded * bytes on success or 0 on error. File will get decompressed as necessary. * Same decompression requirements as cbfs_load_and_decompress(). */ size_t cbfs_boot_load_struct(const char *name, void *buf, size_t buf_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