0001 COREBOOT firmware information
0002
0003 The device tree node to communicate the location of coreboot's memory-resident
0004 bookkeeping structures to the kernel. Since coreboot itself cannot boot a
0005 device-tree-based kernel (yet), this node needs to be inserted by a
0006 second-stage bootloader (a coreboot "payload").
0007
0008 Required properties:
0009 - compatible: Should be "coreboot"
0010 - reg: Address and length of the following two memory regions, in order:
0011 1.) The coreboot table. This is a list of variable-sized descriptors
0012 that contain various compile- and run-time generated firmware
0013 parameters. It is identified by the magic string "LBIO" in its first
0014 four bytes.
0015 See coreboot's src/commonlib/include/commonlib/coreboot_tables.h for
0016 details.
0017 2.) The CBMEM area. This is a downward-growing memory region used by
0018 coreboot to dynamically allocate data structures that remain resident.
0019 It may or may not include the coreboot table as one of its members. It
0020 is identified by a root node descriptor with the magic number
0021 0xc0389481 that resides in the topmost 8 bytes of the area.
0022 See coreboot's src/include/imd.h for details.
0023
0024 Example:
0025 firmware {
0026 ranges;
0027
0028 coreboot {
0029 compatible = "coreboot";
0030 reg = <0xfdfea000 0x264>,
0031 <0xfdfea000 0x16000>;
0032 }
0033 };
