src/mainboard/emulation/qemu-i440fx/dsdt.asl

/* Bochs/QEMU ACPI DSDT ASL definition */
/* SPDX-License-Identifier: GPL-2.0-only */

#include <acpi/acpi.h>
DefinitionBlock (
	"dsdt.aml",
	"DSDT",
	ACPI_DSDT_REV_1,
	OEM_ID,
	ACPI_TABLE_CREATOR,
	0x1                 // OEM Revision
	)
{
	#include <acpi/dsdt_top.asl>

#include "acpi/dbug.asl"


/****************************************************************
 * PCI Bus definition
 ****************************************************************/

	Scope(\_SB) {
		Device(PCI0) {
			Name(_HID, EisaId("PNP0A03"))
			Name(_UID, 1)
		}
	}

#include "acpi/pci-crs.asl"
#include "acpi/hpet.asl"


/****************************************************************
 * VGA
 ****************************************************************/

	Scope(\_SB.PCI0) {
		Device(VGA) {
			Name(_ADR, 0x00020000)
			OperationRegion(PCIC, PCI_Config, 0, 0x4)
			Field(PCIC, DWordAcc, NoLock, Preserve) {
				VEND, 32
			}
			Method(_S1D, 0, NotSerialized) {
				Return (0x00)
			}
			Method(_S2D, 0, NotSerialized) {
				Return (0x00)
			}
			Method(_S3D, 0, NotSerialized) {
				If (VEND == 0x1001b36) {
				Return (0x03)           // QXL
				} Else {
				Return (0x00)
				}
			}
		}
	}


/****************************************************************
 * PIIX4 PM
 ****************************************************************/

	Scope(\_SB.PCI0) {
		Device(PX13) {
			Name(_ADR, 0x00010003)
			OperationRegion(P13C, PCI_Config, 0x00, 0xff)
		}
	}


/****************************************************************
 * PIIX3 ISA bridge
 ****************************************************************/

	Scope(\_SB.PCI0) {
		Device(ISA) {
			Name(_ADR, 0x00010000)

			/* PIIX PCI to ISA irq remapping */
			OperationRegion(P40C, PCI_Config, 0x60, 0x04)

			/* enable bits */
			Field(\_SB.PCI0.PX13.P13C, AnyAcc, NoLock, Preserve) {
				Offset(0x5f),
				, 7,
				LPEN, 1,         // LPT
				Offset(0x67),
				, 3,
				CAEN, 1,         // COM1
				, 3,
				CBEN, 1,         // COM2
			}
			Name(FDEN, 1)
		}
	}

#include "acpi/isa.asl"


/****************************************************************
 * PCI hotplug
 ****************************************************************/

	Scope(\_SB.PCI0) {
		OperationRegion(PCST, SystemIO, 0xae00, 0x08)
		Field(PCST, DWordAcc, NoLock, WriteAsZeros) {
			PCIU, 32,
			PCID, 32,
		}

		OperationRegion(SEJ, SystemIO, 0xae08, 0x04)
		Field(SEJ, DWordAcc, NoLock, WriteAsZeros) {
			B0EJ, 32,
		}

		/* Methods called by bulk generated PCI devices below */

		/* Methods called by hotplug devices */
		Method(PCEJ, 1, NotSerialized) {
			// _EJ0 method - eject callback
			B0EJ = 1 << Arg0
			Return (0x0)
		}

		/* Hotplug notification method supplied by SSDT */
		External(\_SB.PCI0.PCNT, MethodObj)

		/* PCI hotplug notify method */
		Method(PCNF, 0) {
			// Local0 = iterator
			Local0 = 0
			While (Local0 < 31) {
				Local0++
				If (PCIU & (1 << Local0)) {
				PCNT(Local0, 1)
				}
				If (PCID & (1 << Local0)) {
				PCNT(Local0, 3)
				}
			}
		}
	}


/****************************************************************
 * PCI IRQs
 ****************************************************************/

	Scope(\_SB) {
		Scope(PCI0) {
			Name(_PRT, Package() {
				/* PCI IRQ routing table, example from ACPI 2.0a specification,
		  section 6.2.8.1 */
				/* Note: we provide the same info as the PCI routing
		  table of the Bochs BIOS */

#define prt_slot(nr, lnk0, lnk1, lnk2, lnk3) \
	Package() { nr##ffff, 0, lnk0, 0 }, \
	Package() { nr##ffff, 1, lnk1, 0 }, \
	Package() { nr##ffff, 2, lnk2, 0 }, \
	Package() { nr##ffff, 3, lnk3, 0 }

#define prt_slot0(nr) prt_slot(nr, LNKD, LNKA, LNKB, LNKC)
#define prt_slot1(nr) prt_slot(nr, LNKA, LNKB, LNKC, LNKD)
#define prt_slot2(nr) prt_slot(nr, LNKB, LNKC, LNKD, LNKA)
#define prt_slot3(nr) prt_slot(nr, LNKC, LNKD, LNKA, LNKB)

				prt_slot0(0x0000),
				/* Device 1 is power mgmt device, and can only use irq 9 */
				prt_slot(0x0001, LNKS, LNKB, LNKC, LNKD),
				prt_slot2(0x0002),
				prt_slot3(0x0003),
				prt_slot0(0x0004),
				prt_slot1(0x0005),
				prt_slot2(0x0006),
				prt_slot3(0x0007),
				prt_slot0(0x0008),
				prt_slot1(0x0009),
				prt_slot2(0x000a),
				prt_slot3(0x000b),
				prt_slot0(0x000c),
				prt_slot1(0x000d),
				prt_slot2(0x000e),
				prt_slot3(0x000f),
				prt_slot0(0x0010),
				prt_slot1(0x0011),
				prt_slot2(0x0012),
				prt_slot3(0x0013),
				prt_slot0(0x0014),
				prt_slot1(0x0015),
				prt_slot2(0x0016),
				prt_slot3(0x0017),
				prt_slot0(0x0018),
				prt_slot1(0x0019),
				prt_slot2(0x001a),
				prt_slot3(0x001b),
				prt_slot0(0x001c),
				prt_slot1(0x001d),
				prt_slot2(0x001e),
				prt_slot3(0x001f),
			})
		}

		Field(PCI0.ISA.P40C, ByteAcc, NoLock, Preserve) {
			PRQ0,   8,
			PRQ1,   8,
			PRQ2,   8,
			PRQ3,   8
		}

		Method(IQST, 1, NotSerialized) {
			// _STA method - get status
			If (0x80 & Arg0) {
				Return (0x09)
			}
			Return (0x0B)
		}
		Method(IQCR, 1, Serialized) {
			// _CRS method - get current settings
			Name(PRR0, ResourceTemplate() {
				Interrupt(, Level, ActiveHigh, Shared) { 0 }
			})
			CreateDWordField(PRR0, 0x05, PRRI)
			If (Arg0 < 0x80) {
				PRRI = Arg0
			}
			Return (PRR0)
		}

#define define_link(link, uid, reg)                             \
		Device(link) {                                          \
			Name(_HID, EISAID("PNP0C0F"))                       \
			Name(_UID, uid)                                     \
			Name(_PRS, ResourceTemplate() {                     \
				Interrupt(, Level, ActiveHigh, Shared) {        \
				5, 10, 11                                   \
				}                                               \
			})                                                  \
			Method(_STA, 0, NotSerialized) {                    \
				Return (IQST(reg))                              \
			}                                                   \
			Method(_DIS, 0, NotSerialized) {                    \
				reg |= 0x80                              \
			}                                                   \
			Method(_CRS, 0, NotSerialized) {                    \
				Return (IQCR(reg))                              \
			}                                                   \
			Method(_SRS, 1, NotSerialized) {                    \
				CreateDWordField(Arg0, 0x05, PRRI)              \
				reg = PRRI                                \
			}                                                   \
		}

		define_link(LNKA, 0, PRQ0)
		define_link(LNKB, 1, PRQ1)
		define_link(LNKC, 2, PRQ2)
		define_link(LNKD, 3, PRQ3)

		Device(LNKS) {
			Name(_HID, EISAID("PNP0C0F"))
			Name(_UID, 4)
			Name(_PRS, ResourceTemplate() {
				Interrupt(, Level, ActiveHigh, Shared) { 9 }
			})

			// The SCI cannot be disabled and is always attached to GSI 9,
			// so these are no-ops.  We only need this link to override the
			// polarity to active high and match the content of the MADT.
			Method(_STA, 0, NotSerialized) { Return (0x0b) }
			Method(_DIS, 0, NotSerialized) { }
			Method(_CRS, 0, NotSerialized) { Return (_PRS) }
			Method(_SRS, 1, NotSerialized) { }
		}
	}

/****************************************************************
 * General purpose events
 ****************************************************************/

	Scope(\_GPE) {
		Name(_HID, "ACPI0006")

		Method(_L00) {
		}
		Method(_E01) {
		}
		Method(_E02) {
		}
		Method(_L03) {
		}
		Method(_L04) {
		}
		Method(_L05) {
		}
		Method(_L06) {
		}
		Method(_L07) {
		}
		Method(_L08) {
		}
		Method(_L09) {
		}
		Method(_L0A) {
		}
		Method(_L0B) {
		}
		Method(_L0C) {
		}
		Method(_L0D) {
		}
		Method(_L0E) {
		}
		Method(_L0F) {
		}
	}
}