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authorFurquan Shaikh <furquan@google.com>2021-08-24 13:42:05 -0700
committerFurquan Shaikh <furquan@google.com>2021-09-13 22:42:55 +0000
commitbee831e95805a963c17a2bba186ce7babd3b92bf (patch)
tree05221c2a5bcba5503f6b93d64ef461b5c5cf976c /src/soc/intel/tigerlake
parent8edbba4cc48ea42978cd95de015170288b86c3c3 (diff)
soc/intel/tgl: Enable USB4 resources based on common Kconfig
Intel TGL BIOS specification (doc ##611569) Revision 0.7.6 Section 7.2.5.1.5 recommends reserving the following resources for each PCIe USB4 root port: - 42 buses - 194 MiB Non-prefetchable memory - 448 MiB Prefetchable memory This change enables reserving of resources for USB4 when mainboard selects the newly added Kconfig SOC_INTEL_ENABLE_USB4_PCIE_RESOURCES. This is similar to the change for ADL in commit 8d11cdc6fa ("soc/intel/alderlake: Add Kconfig for recommended PCIe TBT resources"). Change-Id: I25ec3f74ebd5727fa4b13f5a3b11050f77ecb008 Signed-off-by: Furquan Shaikh <furquan@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/57125 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/soc/intel/tigerlake')
-rw-r--r--src/soc/intel/tigerlake/Kconfig18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/soc/intel/tigerlake/Kconfig b/src/soc/intel/tigerlake/Kconfig
index 00913c7e64..35d8603741 100644
--- a/src/soc/intel/tigerlake/Kconfig
+++ b/src/soc/intel/tigerlake/Kconfig
@@ -287,4 +287,22 @@ config SOC_INTEL_CRASHLOG
help
Enables CrashLog.
+# Intel recommends reserving the following resources per USB4 root port,
+# from TGL BIOS Spec (doc #611569) Revision 0.7.6 Section 7.2.5.1.5
+# - 42 buses
+# - 194 MiB Non-prefetchable memory
+# - 448 MiB Prefetchable memory
+if SOC_INTEL_ENABLE_USB4_PCIE_RESOURCES
+
+config PCIEXP_HOTPLUG_BUSES
+ default 42
+
+config PCIEXP_HOTPLUG_MEM
+ default 0xc200000 # 194 MiB
+
+config PCIEXP_HOTPLUG_PREFETCH_MEM
+ default 0x1c000000 # 448 MiB
+
+endif # SOC_INTEL_ENABLE_USB4_PCIE_RESOURCES
+
endif