/* 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,	20,	// EPBAR

		// MCHBAR
		MHEN,	 1,	// Enable
		,	13,	//
		MHBR,	18,	// MCHBAR

		// PCIe BAR
		PXEN,	 1,	// Enable
		PXSZ,	 2,	// BAR size
		,	23,	//
		PXBR,	 6,	// PCIe BAR

		// DMIBAR
		DMEN,	 1,	// Enable
		,	11,	//
		DMBR,	20,	// DMIBAR

		// ...

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

		Offset (0x9c),	// Top of Low Used Memory
		,	 3,
		TLUD,	 5,

		Offset (0xa0),	// Top of Used Memory
		TOM,	16,
	}

}


// Current Resource Settings
Name (MCRS, ResourceTemplate()
{
	// Bus Numbers
	WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
			0x0000, 0x0000, 0x00ff, 0x0000, 0x0100,,, 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)

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

Method (_CRS, 0, Serialized)
{
	// 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 27-31 of
	// the top of memory address.
	ShiftLeft (^MCHC.TLUD, 27, PMIN)
	Add(Subtract(PMAX, PMIN), 1, PLEN)

	Return (MCRS)
}