src/soc/intel/broadwell/acpi/pch.asl

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2007-2009 coresystems GmbH
 * Copyright (C) 2014 Google Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <soc/iomap.h>

Scope (\)
{
	// IO-Trap at 0x800. This is the ACPI->SMI communication interface.
	OperationRegion (IO_T, SystemIO, 0x800, 0x10)
	Field (IO_T, ByteAcc, NoLock, Preserve)
	{
		Offset (0x8),
		TRP0, 8		// IO-Trap at 0x808
	}

	// Root Complex Register Block
	OperationRegion (RCRB, SystemMemory, RCBA_BASE_ADDRESS, RCBA_BASE_SIZE)
	Field (RCRB, DWordAcc, Lock, Preserve)
	{
		Offset (0x3404), // High Performance Timer Configuration
		HPAS, 2, 	// Address Select
		, 5,
		HPTE, 1,	// Address Enable
	}

	/*
	 * Check PCH type
	 * Return 1 if PCH is WildcatPoint
	 * Return 0 if PCH is LynxPoint
	 */
	Method (ISWP)
	{
		And (\_SB.PCI0.LPCB.PDID, 0xfff0, Local0)
		If (LEqual (Local0, 0x9cc0)) {
			Return (1)
		} Else {
			Return (0)
		}
	}
}

// High Definition Audio (Azalia) 0:1b.0
#include "hda.asl"

// ADSP/SST 0:13.0
#include "adsp.asl"

// PCI Express Ports 0:1c.x
#include "pcie.asl"

// USB EHCI 0:1d.0
#include "ehci.asl"

// USB XHCI 0:14.0
#include "xhci.asl"

// LPC Bridge 0:1f.0
#include "lpc.asl"

// SATA 0:1f.2
#include "sata.asl"

// SMBus 0:1f.3
#include "smbus.asl"

// Serial IO
#include "serialio.asl"

Method (_OSC, 4)
{
	/* Check for proper GUID */
	If (LEqual (Arg0, ToUUID("33DB4D5B-1FF7-401C-9657-7441C03DD766")))
	{
		/* Let OS control everything */
		Return (Arg3)
	}
	Else
	{
		/* Unrecognized UUID */
		CreateDWordField (Arg3, 0, CDW1)
		Or (CDW1, 4, CDW1)
		Return (Arg3)
	}
}