1 /* SPDX-License-Identifier: GPL-2.0-only */
3 #include <acpi/acpigen_extern.asl>
5 #if CONFIG(CHROMEOS_NVS)
6 /* ChromeOS specific */
7 #include <vendorcode/google/chromeos/acpi/chromeos.asl>
10 /* Operating system enumeration. */
13 /* 0 => PIC mode, 1 => APIC Mode */
16 /* Power state (AC = 1) */
20 * The _PIC method is called by the OS to choose between interrupt
21 * routing via the i8259 interrupt controller or the APIC.
23 * _PIC is called with a parameter of 0 for i8259 configuration and
24 * with a parameter of 1 for Local Apic/IOAPIC configuration.
29 /* Remember the OS' IRQ routing choice. */
33 #if CONFIG(ECAM_MMCONF_SUPPORT)
35 /* Base address of PCIe config space */
36 Name(PCBA, CONFIG_ECAM_MMCONF_BASE_ADDRESS)
38 /* Length of PCIe config space, 1MB each bus */
39 Name(PCLN, CONFIG_ECAM_MMCONF_LENGTH)
41 /* PCIe Configuration Space */
42 OperationRegion(PCFG, SystemMemory, PCBA, PCLN) /* Each bus consumes 1MB */
44 /* From the Linux documentation (Documentation/PCI/acpi-info.rst):
45 * [6] PCI Firmware 3.2, sec 4.1.2:
46 * If the operating system does not natively comprehend reserving the
47 * MMCFG region, the MMCFG region must be reserved by firmware. The
48 * address range reported in the MCFG table or by _CBA method (see Section
49 * 4.1.3) must be reserved by declaring a motherboard resource. For most
50 * systems, the motherboard resource would appear at the root of the ACPI
51 * namespace (under \_SB) in a node with a _HID of EISAID (PNP0C02), and
52 * the resources in this case should not be claimed in the root PCI bus's
53 * _CRS. The resources can optionally be returned in Int15 E820 or
54 * EFIGetMemoryMap as reserved memory but must always be reported through
55 * ACPI as a motherboard resource.
57 Device (PERC) // PCI ECAM Resource Consumption
59 Name (_HID, EisaId("PNP0C02"))
60 Method (_CRS, 0, Serialized)
62 Name (RBUF, ResourceTemplate ()
64 QWordMemory (ResourceConsumer, PosDecode, MinFixed, MaxFixed,
65 NonCacheable, ReadWrite,
66 0x0000000000000000, // Granularity
67 0x0000000000000000, // _MIN
68 0x0000000000000001, // _MAX
69 0x0000000000000000, // Translation
70 0x0000000000000002, // _Len
71 ,, _Y00, AddressRangeMemory, TypeStatic)
73 CreateQWordField (RBUF, \_SB.PERC._CRS._Y00._MIN, MIN1)
74 CreateQWordField (RBUF, \_SB.PERC._CRS._Y00._MAX, MAX1)
75 CreateQWordField (RBUF, \_SB.PERC._CRS._Y00._LEN, LEN1)
76 MIN1 = CONFIG_ECAM_MMCONF_BASE_ADDRESS
77 MAX1 = (MIN1 + CONFIG_ECAM_MMCONF_LENGTH -1)
78 LEN1 = CONFIG_ECAM_MMCONF_LENGTH