/* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpigen_extern.asl> #if CONFIG(CHROMEOS_NVS) /* ChromeOS specific */ #include <vendorcode/google/chromeos/acpi/chromeos.asl> #endif /* Operating system enumeration. */ Name (OSYS, 0) /* 0 => PIC mode, 1 => APIC Mode */ Name (PICM, 0) /* Power state (AC = 1) */ Name (PWRS, 1) /* * The _PIC method is called by the OS to choose between interrupt * routing via the i8259 interrupt controller or the APIC. * * _PIC is called with a parameter of 0 for i8259 configuration and * with a parameter of 1 for Local Apic/IOAPIC configuration. */ Method (_PIC, 1) { /* Remember the OS' IRQ routing choice. */ PICM = Arg0 } #if CONFIG(ECAM_MMCONF_SUPPORT) Scope(\_SB) { /* Base address of PCIe config space */ Name(PCBA, CONFIG_ECAM_MMCONF_BASE_ADDRESS) /* Length of PCIe config space, 1MB each bus */ Name(PCLN, CONFIG_ECAM_MMCONF_LENGTH) /* PCIe Configuration Space */ OperationRegion(PCFG, SystemMemory, PCBA, PCLN) /* Each bus consumes 1MB */ /* From the Linux documentation (Documentation/PCI/acpi-info.rst): * [6] PCI Firmware 3.2, sec 4.1.2: * If the operating system does not natively comprehend reserving the * MMCFG region, the MMCFG region must be reserved by firmware. The * address range reported in the MCFG table or by _CBA method (see Section * 4.1.3) must be reserved by declaring a motherboard resource. For most * systems, the motherboard resource would appear at the root of the ACPI * namespace (under \_SB) in a node with a _HID of EISAID (PNP0C02), and * the resources in this case should not be claimed in the root PCI bus's * _CRS. The resources can optionally be returned in Int15 E820 or * EFIGetMemoryMap as reserved memory but must always be reported through * ACPI as a motherboard resource. */ Device (PERC) // PCI ECAM Resource Consumption { Name (_HID, EisaId("PNP0C02")) Method (_CRS, 0, Serialized) { Name (RBUF, ResourceTemplate () { QWordMemory (ResourceConsumer, PosDecode, MinFixed, MaxFixed, NonCacheable, ReadWrite, 0x0000000000000000, // Granularity 0x0000000000000000, // _MIN 0x0000000000000001, // _MAX 0x0000000000000000, // Translation 0x0000000000000002, // _Len ,, _Y00, AddressRangeMemory, TypeStatic) }) CreateQWordField (RBUF, \_SB.PERC._CRS._Y00._MIN, MIN1) CreateQWordField (RBUF, \_SB.PERC._CRS._Y00._MAX, MAX1) CreateQWordField (RBUF, \_SB.PERC._CRS._Y00._LEN, LEN1) MIN1 = CONFIG_ECAM_MMCONF_BASE_ADDRESS MAX1 = (MIN1 + CONFIG_ECAM_MMCONF_LENGTH -1) LEN1 = CONFIG_ECAM_MMCONF_LENGTH Return (RBUF) } } } #endif