Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10868
-gerrit
commit 397a105358899b32f123ab06b4bcf8c2e90329c8 Author: Patrick Georgi pgeorgi@chromium.org Date: Thu Jul 9 13:57:00 2015 +0200
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 pgeorgi@chromium.org --- payloads/libpayload/include/fmap_serialized.h | 73 +++++++++++++++++++++++ payloads/libpayload/include/libpayload.h | 5 ++ payloads/libpayload/libc/Makefile.inc | 1 + payloads/libpayload/libc/fmap.c | 84 +++++++++++++++++++++++++++ 4 files changed, 163 insertions(+)
diff --git a/payloads/libpayload/include/fmap_serialized.h b/payloads/libpayload/include/fmap_serialized.h new file mode 100644 index 0000000..3585f0b --- /dev/null +++ b/payloads/libpayload/include/fmap_serialized.h @@ -0,0 +1,73 @@ +/* + * Copyright 2010, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT + * OWNER 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. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + */ + +#ifndef FLASHMAP_SERIALIZED_H__ +#define FLASHMAP_SERIALIZED_H__ + +#include <stdint.h> + +#define FMAP_SIGNATURE "__FMAP__" +#define FMAP_VER_MAJOR 1 /* this header's FMAP minor version */ +#define FMAP_VER_MINOR 1 /* this header's FMAP minor version */ +#define FMAP_STRLEN 32 /* maximum length for strings, */ + /* including null-terminator */ + +enum fmap_flags { + FMAP_AREA_STATIC = 1 << 0, + FMAP_AREA_COMPRESSED = 1 << 1, + FMAP_AREA_RO = 1 << 2, +}; + +/* Mapping of volatile and static regions in firmware binary */ +struct fmap_area { + uint32_t offset; /* offset relative to base */ + uint32_t size; /* size in bytes */ + uint8_t name[FMAP_STRLEN]; /* descriptive name */ + uint16_t flags; /* flags for this area */ +} __attribute__((packed)); + +struct fmap { + uint8_t signature[8]; /* "__FMAP__" (0x5F5F464D41505F5F) */ + uint8_t ver_major; /* major version */ + uint8_t ver_minor; /* minor version */ + uint64_t base; /* address of the firmware binary */ + uint32_t size; /* size of firmware binary in bytes */ + uint8_t name[FMAP_STRLEN]; /* name of this firmware binary */ + uint16_t nareas; /* number of areas described by + fmap_areas[] below */ + struct fmap_area areas[]; +} __attribute__((packed)); + +#endif /* FLASHMAP_SERIALIZED_H__ */ diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h index c09fc17..b92567c 100644 --- a/payloads/libpayload/include/libpayload.h +++ b/payloads/libpayload/include/libpayload.h @@ -47,6 +47,7 @@ #include <ctype.h> #include <die.h> #include <endian.h> +#include <fmap_serialized.h> #include <ipchksum.h> #include <kconfig.h> #include <stddef.h> @@ -405,4 +406,8 @@ void gdb_enter(void); /* Disconnect existing GDB connection if one exists. */ void gdb_exit(s8 exit_status);
+/* look for area "name" in "fmap", setting offset and size to describe it. + Returns 0 on success, < 0 on error. */ +int fmap_region_by_name(const uint32_t fmap_offset, const char * const name, + uint32_t * const offset, uint32_t * const size); #endif diff --git a/payloads/libpayload/libc/Makefile.inc b/payloads/libpayload/libc/Makefile.inc index b3c0f76..edef62c 100644 --- a/payloads/libpayload/libc/Makefile.inc +++ b/payloads/libpayload/libc/Makefile.inc @@ -38,6 +38,7 @@ libc-$(CONFIG_LP_LIBC) += qsort.c libc-$(CONFIG_LP_LIBC) += hexdump.c libc-$(CONFIG_LP_LIBC) += die.c libc-$(CONFIG_LP_LIBC) += coreboot.c +libc-$(CONFIG_LP_LIBC) += fmap.c
ifeq ($(CONFIG_LP_ARCH_MIPS),y) libc-$(CONFIG_LP_LIBC) += 64bit_div.c diff --git a/payloads/libpayload/libc/fmap.c b/payloads/libpayload/libc/fmap.c new file mode 100644 index 0000000..af9902e --- /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 <libpayload-config.h> +#include <libpayload.h> +#include <coreboot_tables.h> +#include <cbfs.h> +#include <fmap_serialized.h> +#include <stdint.h> + +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; +}