soc/intel/alderlake/hsphy: Add support for HSPHY firmware loading

BIOS must send the IP_LOAD HECI command to fetch the firmware for CPU
PCIe Gen5 and upload it via CPU REG BAR prior FSP Silicon Init.
Implementation based on public Slimbootloader's
"Silicon/AlderlakePkg/Library/CpuPcieHsPhyInitLib".

TEST=Boot MSI PRO Z690-A and see the HSPHY FW is loaded.
PCIe x16 Gen3 GPU card started working in the PCIE 5.0 slot.

[DEBUG]  HECI: Sending Get IP firmware command
[DEBUG]  HECI: Get IP firmware success. Response:
[DEBUG]    Payload size = 0x6944
[DEBUG]    Hash type used for signing payload = 0x3

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: I6c6c11581e3d3d9bab0131fae6ef487cafe98080
Signed-off-by: Michał Kopeć <michal.kopec@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64074
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Crawford <tcrawford@system76.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

0 files changed, 0 insertions, 0 deletions