Add a RES0 device to the SSDT to reserve the PCI ECAM area. This fixes the warning that Linux prints:
acpi PNP0A08:00: [Firmware Bug]: ECAM area [mem 0x40000000-0x4fffffff] not reserved in ACPI namespace With this change, the "Firmware Bug" message is no longer printed, but a different warning is displayed: "system 00:00: [mem 0x40000000-0x4fffffff window] could not be reserved" It appears this is a harmless message though: a discussion about it can be seen at https://lore.kernel.org/all/20210603141641.GA17284@lpieralisi/#t Signed-off-by: Rebecca Cran <rebe...@bsdio.com> Tested-by: Sami Mujawar <sami.muja...@arm.com> Reviewed-by: Sami Mujawar <sami.muja...@arm.com> --- Platform/ARM/JunoPkg/AcpiTables/AcpiTables.inf | 4 ++++ Platform/ARM/JunoPkg/AcpiTables/AcpiSsdtRootPci.asl | 13 +++++++++++++ 2 files changed, 17 insertions(+) diff --git a/Platform/ARM/JunoPkg/AcpiTables/AcpiTables.inf b/Platform/ARM/JunoPkg/AcpiTables/AcpiTables.inf index f140febc4ad4..9a76475765f0 100644 --- a/Platform/ARM/JunoPkg/AcpiTables/AcpiTables.inf +++ b/Platform/ARM/JunoPkg/AcpiTables/AcpiTables.inf @@ -45,6 +45,10 @@ [FixedPcd] gArmTokenSpaceGuid.PcdGenericWatchdogControlBase gArmTokenSpaceGuid.PcdGenericWatchdogRefreshBase + gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress + gArmJunoTokenSpaceGuid.PcdPciConfigurationSpaceSize + gArmJunoTokenSpaceGuid.PcdPciConfigurationSpaceLimit + # # PL011 UART Settings for Serial Port Console Redirection # diff --git a/Platform/ARM/JunoPkg/AcpiTables/AcpiSsdtRootPci.asl b/Platform/ARM/JunoPkg/AcpiTables/AcpiSsdtRootPci.asl index 317b621e013e..e60fc42a3340 100644 --- a/Platform/ARM/JunoPkg/AcpiTables/AcpiSsdtRootPci.asl +++ b/Platform/ARM/JunoPkg/AcpiTables/AcpiSsdtRootPci.asl @@ -140,6 +140,19 @@ DefinitionBlock("SsdtPci.aml", "SSDT", 1, "ARMLTD", "ARM-JUNO", EFI_ACPI_ARM_OEM Return (RBUF) } // Method(_CRS) + Device (RES0) { + Name (_HID, "PNP0C02" /* PNP Motherboard Resources */) // _HID: Hardware ID + Name (_CRS, ResourceTemplate () { // _CRS: Current Resource Settings + QWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed, NonCacheable, ReadWrite, + 0x0000000000000000, // Granularity + FixedPcdGet64 (PcdPciExpressBaseAddress), // Range Minimum + FixedPcdGet64 (PcdPciConfigurationSpaceLimit), // Range Maximum + 0x0000000000000000, // Translation Offset + FixedPcdGet64 (PcdPciConfigurationSpaceSize), // Length + ,, , AddressRangeMemory, TypeStatic) + }) + } + // // OS Control Handoff // -- 2.25.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#87767): https://edk2.groups.io/g/devel/message/87767 Mute This Topic: https://groups.io/mt/89895617/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
