src/northbridge/intel/gm45/acpi/hostbridge.asl

/* SPDX-License-Identifier: GPL-2.0-only */

#include <arch/ioapic.h>

Name(_HID,EISAID("PNP0A08"))	// PCIe
Name(_CID,EISAID("PNP0A03"))	// PCI

Name(_BBN, 0)

Device (MCHC)
{
	Name(_ADR, 0x00000000)	/* 0:0.0 */

	OperationRegion(MCHP, PCI_Config, 0x00, 0x100)
	Field (MCHP, DWordAcc, NoLock, Preserve)
	{
		Offset (0x40),	/* EPBAR */
		EPEN,	 1,	/* Enable */
		,	11,
		EPBR,	24,	/* EPBAR */

		Offset (0x48),	/* MCHBAR */
		MHEN,	 1,	/* Enable */
		,	13,
		MHBR,	22,	/* MCHBAR */

		Offset (0x60),	/* PCIec BAR */
		PXEN,	 1,	/* Enable */
		PXSZ,	 2,	/* BAR size */
		,	23,
		PXBR,	10,	/* PCIe BAR */

		Offset (0x68),	/* DMIBAR */
		DMEN,	 1,	/* Enable */
		,	11,
		DMBR,	24,	/* DMIBAR */

		/* ... */

		Offset (0x90),	/* PAM0 */
		,	 4,
		PM0H,	 2,
		,	 2,
		Offset (0x91),	/* PAM1 */
		PM1L,	 2,
		,	 2,
		PM1H,	 2,
		,	 2,
		Offset (0x92),	/* PAM2 */
		PM2L,	 2,
		,	 2,
		PM2H,	 2,
		,	 2,
		Offset (0x93),	/* PAM3 */
		PM3L,	 2,
		,	 2,
		PM3H,	 2,
		,	 2,
		Offset (0x94),	/* PAM4 */
		PM4L,	 2,
		,	 2,
		PM4H,	 2,
		,	 2,
		Offset (0x95),	/* PAM5 */
		PM5L,	 2,
		,	 2,
		PM5H,	 2,
		,	 2,
		Offset (0x96),	/* PAM6 */
		PM6L,	 2,
		,	 2,
		PM6H,	 2,
		,	 2,

		Offset (0xa0),	/* Top of Memory */
		TOM,	 8,

		Offset (0xb0),	/* Top of Low Used Memory */
		,	 4,
		TLUD,	12,
	}
}

Name (MCRS, ResourceTemplate()
{
	/* Bus Numbers. Highest bus gets updated later */
	WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
			0x0000, 0x0000, 0x0000, 0x0000,
			CONFIG_ECAM_MMCONF_BUS_NUMBER,,, PB00)

	/* IO Region 0 */
	DWordIO (ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
			0x0000, 0x0000, 0x0cf7, 0x0000, 0x0cf8,,, PI00)

	/* PCI Config Space */
	Io (Decode16, 0x0cf8, 0x0cf8, 0x0001, 0x0008)

	/* IO Region 1 */
	DWordIO (ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
			0x0000, 0x0d00, 0xffff, 0x0000, 0xf300,,, PI01)

	/* VGA memory (0xa0000-0xbffff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000a0000, 0x000bffff, 0x00000000,
			0x00020000,,, ASEG)

	/* OPROM reserved (0xc0000-0xc3fff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000c0000, 0x000c3fff, 0x00000000,
			0x00004000,,, OPR0)

	/* OPROM reserved (0xc4000-0xc7fff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000c4000, 0x000c7fff, 0x00000000,
			0x00004000,,, OPR1)

	/* OPROM reserved (0xc8000-0xcbfff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000c8000, 0x000cbfff, 0x00000000,
			0x00004000,,, OPR2)

	/* OPROM reserved (0xcc000-0xcffff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000cc000, 0x000cffff, 0x00000000,
			0x00004000,,, OPR3)

	/* OPROM reserved (0xd0000-0xd3fff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000d0000, 0x000d3fff, 0x00000000,
			0x00004000,,, OPR4)

	/* OPROM reserved (0xd4000-0xd7fff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000d4000, 0x000d7fff, 0x00000000,
			0x00004000,,, OPR5)

	/* OPROM reserved (0xd8000-0xdbfff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000d8000, 0x000dbfff, 0x00000000,
			0x00004000,,, OPR6)

	/* OPROM reserved (0xdc000-0xdffff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000dc000, 0x000dffff, 0x00000000,
			0x00004000,,, OPR7)

	/* BIOS Extension (0xe0000-0xe3fff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000e0000, 0x000e3fff, 0x00000000,
			0x00004000,,, ESG0)

	/* BIOS Extension (0xe4000-0xe7fff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000e4000, 0x000e7fff, 0x00000000,
			0x00004000,,, ESG1)

	/* BIOS Extension (0xe8000-0xebfff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000e8000, 0x000ebfff, 0x00000000,
			0x00004000,,, ESG2)

	/* BIOS Extension (0xec000-0xeffff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000ec000, 0x000effff, 0x00000000,
			0x00004000,,, ESG3)

	/* System BIOS (0xf0000-0xfffff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x000f0000, 0x000fffff, 0x00000000,
			0x00010000,,, FSEG)

	/* PCI Memory Region (Top of memory-0xfebfffff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x00000000, 0xfebfffff, 0x00000000,
			IO_APIC_ADDR,,, PM01)

	/* PCI Memory Region above 4G TOUUD -> 1 << cpu_addr_bits */
	QWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0x00000000, 0x00000000, 0x00000000,
			0x00000000,,, PM02)

	/* TPM Area (0xfed40000-0xfed44fff) */
	DWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed,
			Cacheable, ReadWrite,
			0x00000000, 0xfed40000, 0xfed44fff, 0x00000000,
			0x00005000,,, TPMR)
})

External (A4GS, IntObj)
External (A4GB, IntObj)

/* Current Resource Settings */
Method (_CRS, 0, Serialized)
{
	/* Set highest PCI bus */
	 CreateWordField(MCRS, ^PB00._MAX, BMAX)
	 CreateWordField(MCRS, ^PB00._LEN, BLEN)
	 BMAX = BLEN - 1

	/* Find PCI resource area in MCRS */
	CreateDwordField(MCRS, ^PM01._MIN, PMIN)
	CreateDwordField(MCRS, ^PM01._MAX, PMAX)
	CreateDwordField(MCRS, ^PM01._LEN, PLEN)

	/*
	 * Fix up PCI memory region:
	 * Enter actual TOLUD. The TOLUD register contains bits 20-31 of
	 * the top of memory address.
	 */
	PMIN = ^MCHC.TLUD << 20
	PLEN = PMAX - PMIN + 1

	if (A4GS != 0) {
		CreateQwordField(MCRS, ^PM02._MIN, MMIN)
		CreateQwordField(MCRS, ^PM02._MAX, MMAX)
		CreateQwordField(MCRS, ^PM02._LEN, MLEN)
		/* Set 64bit MMIO resource base and length */
		MLEN = A4GS
		MMIN = A4GB
		MMAX = MMIN + MLEN - 1
	}

	Return (MCRS)
}