diff options
| author | Tim Wawrzynczak <twawrzynczak@chromium.org> | 2021-03-12 12:46:02 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2021-03-15 06:03:31 +0000 |
| commit | 8d11cdc6fa121f7f5c77b49b6e0ea689c62b3da0 (patch) | |
| tree | b033f4f825ec220c1358e36279c683884f434cd2 /src/soc | |
| parent | 99ab1fd13e9603cf0c8cf5a42e0b9564e05890e4 (diff) | |
soc/intel/alderlake: Add Kconfig for recommended PCIe TBT resources
The Intel ADL BIOS specification #627270 recommends reserving the
following resources for each PCIe TBT root port:
- 42 buses
- 192 MiB Non-prefetchable memory
- 448 MiB Prefetchable memory
Add a mainboard Kconfig which will auto-select these recommended values,
in addition to PCIEXP_HOTPLUG.
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Icdfa2688d69c2db0f98d0523d5aba42eec1824db
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51460
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/alderlake/Kconfig | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/Kconfig b/src/soc/intel/alderlake/Kconfig index f22d1d4b87..522fe53560 100644 --- a/src/soc/intel/alderlake/Kconfig +++ b/src/soc/intel/alderlake/Kconfig @@ -130,6 +130,31 @@ config HEAP_SIZE hex default 0x10000 +# Intel recommends reserving the following resources per PCIe TBT root port, +# from ADL BIOS Spec (doc #627270) Revision 0.6.0 Section 7.2.5.1.5 +# - 42 buses +# - 194 MiB Non-prefetchable memory +# - 448 MiB Prefetchable memory +config ADL_ENABLE_USB4_PCIE_RESOURCES + def_bool n + select PCIEXP_HOTPLUG + +if ADL_ENABLE_USB4_PCIE_RESOURCES + +config PCIEXP_HOTPLUG_BUSES + int + default 42 + +config PCIEXP_HOTPLUG_MEM + hex + default 0xc200000 + +config PCIEXP_HOTPLUG_PREFETCH_MEM + hex + default 0x1c000000 + +endif # ADL_ENABLE_USB4_PCIE_RESOURCES + config MAX_PCH_ROOT_PORTS int default 10 if SOC_INTEL_ALDERLAKE_PCH_M |