mb/purism/librem_l1um_v2: Add support for Purism Librem L1UM v2

This adds support for booting the Librem L1UM v2 mainboard with
coreboot, using binaries from the original BIOS.

The following features have been tested on PureOS:
- USB: front USB3, rear USB3, USB2 header on board
- SATA: 8x SATA ports, one M.2 M-key shared with SATA0
- PCIe: two PEG slots, one PCIe slot from PCH, and one M.2 M-key
- Network: 2x GbE
- Video: BMC VGA and IPMI
- Serial: Physical serial port, provided by BMC SuperIO
- Hardware monitor
- POST code display
- TPM2

These binaries are extracted from the original BIOS:
- Intel Management Engine
- Intel Firmware Descriptor

This was developed and tested on a Librem L1UM v2 using a Core i7-9700
CPU.  Native graphics init works for the Aspeed AST2500 BMC.

For development, the serial port console works from bootblock.  Early
init waits for the BMC to finish booting since this is required for
serial port output.

Change-Id: I990f6024d65098a9553d7d1fe7f36614cc55ea19
Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75090
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions