x86 Board Development

Board development requires System-on-a-Chip (SoC) support. The combined steps are listed here. The development steps for the board are listed below:

1. Required Files

Required Files

Create the board directory as src/mainboard/<Vendor>/<Board>.

The following files are required to build a new board:

1. Kconfig.name - Defines the Kconfig value for the board
2. Kconfig
   1. Selects the SoC for the board and specifies the SPI flash size
      1. BOARD_ROMSIZE_KB_<Size>
      2. SOC_<Vendor>_<Chip Family>
   2. Declare the Kconfig values for:
      1. MAINBOARD_DIR
      2. MAINBOARD_PART_NUMBER
      3. MAINBOARD_VENDOR
3. devicetree.cb - Enable root bridge and serial port
   1. The first line must be "chip soc/Intel/<soc family>"; this path is used by the generated static.c to include the chip.h header file
4. romstage.c
   1. Add routine mainboard_romstage_entry which calls romstage_common
5. Configure coreboot build:
   1. Set LOCALVERSION
   2. FLASHMAP_OFFSET = 0x00700000
   3. Select vendor for the board
   4. Select the board
   5. CBFS_SIZE = 0x00100000
   6. Set the CPU_MICROCODE_CBFS_LEN
   7. Set the CPU_MICROCODE_CBFS_LOC
   8. Set the FSP_IMAGE_ID_STRING
   9. Set the FSP_LOC
   10. Disable GOP_SUPPORT
   11. No payload
   12. Choose the default value for all other options

Modified: 31 January 2016