mb/facebook/monolith: Add Facebook Monolith

The board is booting Linux and has been briefly tested.

SeaBIOS, TianoCore payload and Linux as payload all seem to work fine.

BUG=N/A
TEST=tested on Facebook Monolith

Change-Id: I65a2e03334af65cfb3f825d43fa0daa6e6c75913
Signed-off-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37516
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>

Documentation/mainboard/facebook/monolith.md

@@ -0,0 +1,78 @@
+# Facebook Monolith
+
+This page describes how to run coreboot on the Facebook Monolith.
+
+Please note: the coreboot implementation for this boards is in it's Alpha state and isn't fully 
+tested yet.
+
+## Required blobs
+
+This board currently requires:
+fsp blobs	3rdparty/fsp/KabylakeFspBinPkg/Fsp_M.fd
+		3rdparty/fsp/KabylakeFspBinPkg/Fsp_S.fd
+
+Microcode	3rdparty/intel-microcode/intel-ucode
+
+## Flashing coreboot
+
+### Internal programming
+
+The SPI flash can be accessed using [flashrom].
+
+### External programming
+
+The system has an internal flash chip which is a 16 MiB soldered SOIC-8 chip.
+Specifically, it's a Winbond W25Q128JVSIQ (3.3V).
+
+The system has an external flash chip which is a 16 MiB soldered SOIC-8 chip.
+Specifically, it's a Winbond W25Q128JVSIM (3.3V).
+
+Flashing of these devices is very difficult, disassembling the system destroys the cooling
+solution. Wires need to be connected to be able to flash using an external programmer.
+
+## Known issues
+
+- None
+
+## Untested
+
+- Hardware monitor
+- SDIO
+- Full Embedded Controller support
+- eMMC
+- SATA
+
+## Working
+
+- USB
+- Gigabit Ethernet
+- Graphics (Using FSP GOP)
+- flashrom
+- PCIe
+- EC serial port
+- SMBus
+- Initialization with FSP
+- SeaBIOS payload (commit a5cab58e9a3fb6e168aba919c5669bea406573b4)
+- TianoCore payload (commit a5cab58e9a3fb6e168aba919c5669bea406573b4)
+
+All of the above has been briefly tested by booting Linux from the TianoCore payload.
+SeaBios has been checked to the extend that it runs to the boot selection and provides display
+output.
+
+## Technology
+
+```eval_rst
++------------------+--------------------------------------------------+
+| SoC              | Intel Kaby Lake U                                 |
++------------------+--------------------------------------------------+
+| CPU              | Intel i3-7100U                                   |
++------------------+--------------------------------------------------+
+| Super I/O, EC    | ITE8256                                          |
++------------------+--------------------------------------------------+
+| Coprocessor      | Intel Management Engine                          |
++------------------+--------------------------------------------------+
+```
+
+[W25Q128JVSIQ]: https://www.winbond.com/resource-files/w25q128jv%20revf%2003272018%20plus.pdf
+[W25Q128JVSIM]: https://www.winbond.com/resource-files/w25q128jv%20dtr%20revb%2011042016.pdf
+[flashrom]: https://flashrom.org/Flashrom

Documentation/mainboard/index.md

@@ -32,6 +32,7 @@ The boards in this section are not real mainboards, but emulators.
 ## Facebook
 
 - [FBG-1701](facebook/fbg1701.md)
+- [Monolith](facebook/monolith.md)
 
 ## Foxconn