src/lib/cbfs_master_header.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <endian.h>
   4 #include <fmap_config.h>
   5 #include <commonlib/bsd/cbfs_serialized.h>
   6
   7 struct cbfs_header header = {
   8         .magic = cpu_to_be32(CBFS_HEADER_MAGIC),
   9         .version = cpu_to_be32(CBFS_HEADER_VERSION),
  10         /*
  11          * The offset and romsize fields within the master header are absolute
  12          * values within the boot media. As such, romsize needs to reflect
  13          * the end 'offset' for a CBFS. To achieve that the current buffer
  14          * representing the CBFS region's size is added to the offset of
  15          * the region within a larger image.
  16          */
  17         .romsize = cpu_to_be32(FMAP_SECTION_COREBOOT_START + FMAP_SECTION_COREBOOT_SIZE
  18                                - FMAP_SECTION_FLASH_START),
  19         /*
  20          * The 4 bytes are left out for two reasons:
  21          * 1. the cbfs master header pointer resides there
  22          * 2. some cbfs implementations assume that an image that resides
  23          *    below 4GB has a bootblock and get confused when the end of the
  24          *    image is at 4GB == 0.
  25          */
  26         .bootblocksize = cpu_to_be32(4),
  27         .align = cpu_to_be32(CBFS_ALIGNMENT),
  28         .offset = cpu_to_be32(FMAP_SECTION_COREBOOT_START - FMAP_SECTION_FLASH_START),
  29         .architecture = cpu_to_be32(CBFS_ARCHITECTURE_UNKNOWN),
  30 };