| /* 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")) |
| Name (_CRS, ResourceTemplate() |
| { |
| Memory32Fixed (ReadWrite, CONFIG_ECAM_MMCONF_BASE_ADDRESS, |
| CONFIG_ECAM_MMCONF_LENGTH) |
| }) |
| } |
| } |
| #endif |
