From 89f73dccdbdccff494e9729e94defecd64b92964 Mon Sep 17 00:00:00 2001 From: Patrick Georgi Date: Thu, 9 Jul 2015 13:57:00 +0200 Subject: libpayload: Add support for handling fmaps They will become more common soon, so better support them now. Change-Id: I2b16e1bb7707fe8410365877524ff359aeefc161 Signed-off-by: Patrick Georgi Reviewed-on: http://review.coreboot.org/10868 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- payloads/libpayload/libc/fmap.c | 84 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 payloads/libpayload/libc/fmap.c (limited to 'payloads/libpayload/libc/fmap.c') diff --git a/payloads/libpayload/libc/fmap.c b/payloads/libpayload/libc/fmap.c new file mode 100644 index 0000000000..af9902e441 --- /dev/null +++ b/payloads/libpayload/libc/fmap.c @@ -0,0 +1,84 @@ +/* + * This file is part of the libpayload project. + * + * Copyright (C) 2015 Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +#include +#include +#include +#include +#include + +int fmap_region_by_name(const uint32_t fmap_offset, const char * const name, + uint32_t * const offset, uint32_t * const size) +{ + int i; + + struct fmap *fmap; + struct fmap fmap_head; + struct cbfs_media default_media; + struct cbfs_media *media = &default_media; + + if (init_default_cbfs_media(media) != 0) + return -1; + + media->open(media); + + if (!media->read(media, &fmap_head, fmap_offset, sizeof(fmap_head))) + return -1; + + if (memcmp(fmap_head.signature, FMAP_SIGNATURE, sizeof(fmap_head.signature))) { + return -1; + } + + int fmap_size = sizeof(*fmap) + + fmap_head.nareas * sizeof(struct fmap_area); + + fmap = malloc(fmap_size); + if (!fmap) + return -1; + + if (!media->read(media, fmap, fmap_offset, fmap_size)) + goto err; + + media->close(media); + + for (i = 0; i < fmap->nareas; i++) { + if (strcmp((const char *)fmap->areas[i].name, name) != 0) + continue; + if (offset) + *offset = fmap->areas[i].offset; + if (size) + *size = fmap->areas[i].size; + free(fmap); + return 0; + } +err: + free(fmap); + return -1; +} -- cgit v1.2.3