Aaron Durbin (adurbin@chromium.org) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/12783
-gerrit
commit be707efbfed9d634c63df2a9fdcf9d074636e609 Author: Aaron Durbin adurbin@chromium.org Date: Tue Dec 15 13:33:51 2015 -0600
commonlib: add common cbfs parsing logic
To continue sharing more code between the tools and coreboot proper provide cbfs parsing logic in commonlib. A cbfs_for_each_file() function was added to allow one to act on each file found within a cbfs. cbfs_locate() was updated to use that logic.
BUG=chrome-os-partner:48412 BUG=chromium:445938 BRANCH=None TEST=Utilized and booted on glados.
Change-Id: I1f23841583e78dc3686f106de9eafe1adbef8c9f Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/commonlib/Makefile.inc | 5 + src/commonlib/cbfs.c | 176 +++++++++++++++++++++++++++++++++ src/commonlib/include/commonlib/cbfs.h | 55 +++++++++++ src/include/cbfs.h | 28 +----- src/lib/cbfs.c | 72 -------------- 5 files changed, 237 insertions(+), 99 deletions(-)
diff --git a/src/commonlib/Makefile.inc b/src/commonlib/Makefile.inc index 929bf8e..4545855 100644 --- a/src/commonlib/Makefile.inc +++ b/src/commonlib/Makefile.inc @@ -10,3 +10,8 @@ ramstage-y += region.c smm-y += region.c
ramstage-$(CONFIG_PLATFORM_USES_FSP1_1) += fsp1_1_relocate.c + +bootblock-y += cbfs.c +verstage-y += cbfs.c +romstage-y += cbfs.c +ramstage-y += cbfs.c diff --git a/src/commonlib/cbfs.c b/src/commonlib/cbfs.c new file mode 100644 index 0000000..06d31ed --- /dev/null +++ b/src/commonlib/cbfs.c @@ -0,0 +1,176 @@ +/* + * 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. + */ + +#include <console/console.h> +#include <commonlib/cbfs.h> +#include <commonlib/endian.h> +#include <commonlib/helpers.h> +#include <string.h> + +#if !defined(ERROR) +#define ERROR(x...) printk(BIOS_ERR, "CBFS: " x) +#endif +#if !defined(LOG) +#define LOG(x...) printk(BIOS_INFO, "CBFS: " x) +#endif +#if defined(IS_ENABLED) + +#if IS_ENABLED(CONFIG_DEBUG_CBFS) +#define DEBUG(x...) printk(BIOS_SPEW, "CBFS: " x) +#else +#define DEBUG(x...) +#endif + +#elif !defined(DEBUG) +#define DEBUG(x...) +#endif + +static size_t cbfs_next_offset(const struct region_device *cbfs, + const struct cbfsf *f) +{ + size_t offset; + + if (f == NULL) + return 0; + + /* The region_device objects store absolute offets over the whole + * region. Therefore a relative offset needs to be calculated. */ + offset = rdev_relative_offset(cbfs, &f->data); + offset += region_device_sz(&f->data); + + return ALIGN_UP(offset, CBFS_ALIGNMENT); +} + +static int cbfs_end(const struct region_device *cbfs, size_t offset) +{ + if (offset >= region_device_sz(cbfs)) + return 1; + + return 0; +} + +int cbfs_for_each_file(const struct region_device *cbfs, + const struct cbfsf *prev, struct cbfsf *fh) +{ + size_t offset; + + offset = cbfs_next_offset(cbfs, prev); + + /* Try to scan the entire cbfs region looking for file name. */ + while (1) { + struct cbfs_file file; + const size_t fsz = sizeof(file); + + DEBUG("Checking offset %zx\n", offset); + + /* End of region. */ + if (cbfs_end(cbfs, offset)) + return 1; + + /* Can't read file. Nothing else to do but bail out. */ + if (rdev_readat(cbfs, &file, offset, fsz) != fsz) + break; + + if (memcmp(file.magic, CBFS_FILE_MAGIC, sizeof(file.magic))) { + offset++; + offset = ALIGN_UP(offset, CBFS_ALIGNMENT); + continue; + } + + file.len = read_be32(&file.len); + file.offset = read_be32(&file.offset); + + DEBUG("File @ offset %zx size %x\n", offset, file.len); + + /* Keep track of both the metadata and the data for the file. */ + if (rdev_chain(&fh->metadata, cbfs, offset, file.offset)) + break; + + if (rdev_chain(&fh->data, cbfs, offset + file.offset, file.len)) + break; + + /* Success. */ + return 0; + } + + return -1; +} + +int cbfs_locate(struct cbfsf *fh, const struct region_device *cbfs, + const char *name, uint32_t *type) +{ + struct cbfsf *prev; + + LOG("Locating '%s'\n", name); + + prev = NULL; + + while (1) { + int ret; + char *fname; + int name_match; + const size_t fsz = sizeof(struct cbfs_file); + + ret = cbfs_for_each_file(cbfs, prev, fh); + prev = fh; + + /* Either failed to read or hit the end of the region. */ + if (ret < 0 || ret > 0) + break; + + fname = rdev_mmap(&fh->metadata, fsz, + region_device_sz(&fh->metadata) - fsz); + + if (fname == NULL) + break; + + name_match = !strcmp(fname, name); + rdev_munmap(&fh->metadata, fname); + + if (!name_match) { + DEBUG(" Unmatched '%s' at %zx\n", fname, + rdev_relative_offset(cbfs, &fh->metadata)); + continue; + } + + if (type != NULL) { + uint32_t ftype; + + if (rdev_readat(&fh->metadata, &ftype, + offsetof(struct cbfs_file, type), + sizeof(ftype)) != sizeof(ftype)) + break; + + ftype = read_be32(&ftype); + + if (*type != ftype) { + DEBUG(" Unmatched type %x at %zx\n", ftype, + rdev_relative_offset(cbfs, + &fh->metadata)); + continue; + } + } + + LOG("Found @ offset %zx size %zx\n", + rdev_relative_offset(cbfs, &fh->metadata), + region_device_sz(&fh->data)); + + /* Success. */ + return 0; + } + + LOG("'%s' not found.\n", name); + return -1; +} diff --git a/src/commonlib/include/commonlib/cbfs.h b/src/commonlib/include/commonlib/cbfs.h new file mode 100644 index 0000000..b0a468c --- /dev/null +++ b/src/commonlib/include/commonlib/cbfs.h @@ -0,0 +1,55 @@ +/* + * 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 _COMMONLIB_CBFS_H_ +#define _COMMONLIB_CBFS_H_ + +#include <commonlib/cbfs_serialized.h> +#include <commonlib/region.h> + +/* Object representing cbfs files. */ +struct cbfsf { + struct region_device metadata; + struct region_device data; +}; + +/* Locate file by name and optional type. Returns 0 on succcess else < 0 on + * error.*/ +int cbfs_locate(struct cbfsf *fh, const struct region_device *cbfs, + const char *name, uint32_t *type); + +static inline void cbfs_file_data(struct region_device *data, + const struct cbfsf *file) +{ + rdev_chain(data, &file->data, 0, region_device_sz(&file->data)); +} + +static inline void cbfs_file_metadata(struct region_device *metadata, + const struct cbfsf *file) +{ + rdev_chain(metadata, &file->metadata, 0, + region_device_sz(&file->metadata)); +} + +/* + * Provide a handle to each cbfs file within a cbfs. The prev pointer represents + * the previous file (NULL on first invocation). The next object gets filled + * out with the next file. This returns < 0 on error, 0 on finding the next + * file, and > 0 at end of cbfs. + */ +int cbfs_for_each_file(const struct region_device *cbfs, + const struct cbfsf *prev, struct cbfsf *fh); + +#endif diff --git a/src/include/cbfs.h b/src/include/cbfs.h index 7848d6d..0d95387 100644 --- a/src/include/cbfs.h +++ b/src/include/cbfs.h @@ -16,19 +16,9 @@ #ifndef _CBFS_H_ #define _CBFS_H_
-#include <commonlib/cbfs_serialized.h> -#include <commonlib/region.h> +#include <commonlib/cbfs.h> #include <program_loading.h>
-/* - * CBFS operations consist of the following concepts: - * - region_device for the boot media - * - cbfsd which is a descriptor for representing a cbfs instance - */ - -/* Object representing cbfs files. */ -struct cbfsf; - /*********************************************** * Perform CBFS operations on the boot device. * ***********************************************/ @@ -48,28 +38,12 @@ void *cbfs_boot_map_with_leak(const char *name, uint32_t type, size_t *size); /* Load stage into memory filling in prog. Return 0 on success. < 0 on error. */ int cbfs_prog_stage_load(struct prog *prog);
-/* Locate file by name and optional type. Returns 0 on succcess else < 0 on - * error.*/ -int cbfs_locate(struct cbfsf *fh, const struct region_device *cbfs, - const char *name, uint32_t *type); - /***************************************************************** * Support structures and functions. Direct field access should * * only be done by implementers of cbfs regions -- Not the above * * API. * *****************************************************************/
-struct cbfsf { - struct region_device metadata; - struct region_device data; -}; - -static inline void cbfs_file_data(struct region_device *data, - const struct cbfsf *file) -{ - rdev_chain(data, &file->data, 0, region_device_sz(&file->data)); -} - /* The cbfs_props struct describes the properties associated with a CBFS. */ struct cbfs_props { /* CBFS starts at the following offset within the boot region. */ diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c index d68aa39..55a8536 100644 --- a/src/lib/cbfs.c +++ b/src/lib/cbfs.c @@ -68,78 +68,6 @@ void *cbfs_boot_map_with_leak(const char *name, uint32_t type, size_t *size) return rdev_mmap(&fh.data, 0, fsize); }
-int cbfs_locate(struct cbfsf *fh, const struct region_device *cbfs, - const char *name, uint32_t *type) -{ - size_t offset = 0; - - LOG("Locating '%s'\n", name); - - /* Try to scan the entire cbfs region looking for file name. */ - while (1) { - struct cbfs_file file; - const size_t fsz = sizeof(file); - char *fname; - int name_match; - size_t datasz; - - DEBUG("Checking offset %zx\n", offset); - - /* Can't read file. Nothing else to do but bail out. */ - if (rdev_readat(cbfs, &file, offset, fsz) != fsz) - break; - - if (memcmp(file.magic, CBFS_FILE_MAGIC, sizeof(file.magic))) { - offset++; - offset = ALIGN_UP(offset, CBFS_ALIGNMENT); - continue; - } - - file.len = ntohl(file.len); - file.type = ntohl(file.type); - file.offset = ntohl(file.offset); - - /* See if names match. */ - fname = rdev_mmap(cbfs, offset + fsz, file.offset - fsz); - - if (fname == NULL) - break; - - name_match = !strcmp(fname, name); - rdev_munmap(cbfs, fname); - - if (!name_match) { - DEBUG(" Unmatched '%s' at %zx\n", fname, offset); - offset += file.offset + file.len; - offset = ALIGN_UP(offset, CBFS_ALIGNMENT); - continue; - } - - if (type != NULL && *type != file.type) { - DEBUG(" Unmatched type %x at %zx\n", file.type, offset); - offset += file.offset + file.len; - offset = ALIGN_UP(offset, CBFS_ALIGNMENT); - continue; - } - - LOG("Found @ offset %zx size %x\n", offset, file.len); - /* File and type match. Keep track of both the metadata and - * the data for the file. */ - if (rdev_chain(&fh->metadata, cbfs, offset, file.offset)) - break; - offset += file.offset; - datasz = file.len; - if (rdev_chain(&fh->data, cbfs, offset, datasz)) - break; - - /* Success. */ - return 0; - } - - LOG("'%s' not found.\n", name); - return -1; -} - static size_t inflate(void *src, void *dst) { if (ENV_BOOTBLOCK || ENV_VERSTAGE)