system76-coreboot/src/soc/amd/stoneyridge/acpi/fch.asl

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2011 Advanced Micro Devices, Inc.
 * Copyright (C) 2013 Sage Electronic Engineering, LLC
 *
 * 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.
 */

/* South Bridge */
/*  _SB.PCI0 */

/* Operating System Capabilities Method */
Method(_OSC,4)
{
	// Create DWord-addressable fields from the Capabilities Buffer
	CreateDWordField(Arg3,0,CDW1)
	CreateDWordField(Arg3,4,CDW2)
	CreateDWordField(Arg3,8,CDW3)

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

/* Describe the Southbridge devices */

/* 0:11.0 - SATA */
Device(STCR) {
	Name(_ADR, 0x00110000)
} /* end STCR */

/* 0:14.0 - SMBUS */
Device(SBUS) {
	Name(_ADR, 0x00140000)
} /* end SBUS */

#include "usb.asl"

/* 0:14.2 - I2S Audio */

/* 0:14.3 - LPC */
#include "lpc.asl"

/* 0:14.7 - SD Controller */
Device(SDCN) {
	Name(_ADR, 0x00140007)
} /* end SDCN */

Name(CRES, ResourceTemplate() {
	/* Set the Bus number and Secondary Bus number for the PCI0 device
	 * The Secondary bus range for PCI0 lets the system
	 * know what bus values are allowed on the downstream
	 * side of this PCI bus if there is a PCI-PCI bridge.
	 * PCI busses can have 256 secondary busses which
	 * range from [0-0xFF] but they do not need to be
	 * sequential.
	 */
	WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
		0x0000,		/* address granularity */
		0x0000,		/* range minimum */
		0x00ff,		/* range maximum */
		0x0000,		/* translation */
		0x0100,		/* length */
		,, PSB0)		/* ResourceSourceIndex, ResourceSource, DescriptorName */

	IO(Decode16, 0x0cf8, 0x0cf8, 1,	8)

	WORDIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
		0x0000,		/* address granularity */
		0x0000,		/* range minimum */
		0x0cf7,		/* range maximum */
		0x0000,		/* translation */
		0x0cf8		/* length */
	)
	WORDIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
		0x0000,		/* address granularity */
		0x03b0,		/* range minimum */
		0x03df,		/* range maximum */
		0x0000,		/* translation */
		0x0030		/* length */
	)

	WORDIO(ResourceProducer, MinFixed, MaxFixed, PosDecode, EntireRange,
		0x0000,		/* address granularity */
		0x0d00,		/* range minimum */
		0xffff,		/* range maximum */
		0x0000,		/* translation */
		0xf300		/* length */
	)

	Memory32Fixed(READONLY, 0x000a0000, 0x00020000, VGAM)	/* VGA memory space */
	Memory32Fixed(READONLY, 0x000c0000, 0x00020000, EMM1)	/* Assume C0000-E0000 empty */

	/* memory space for PCI BARs below 4GB */
	Memory32Fixed(ReadOnly, 0x00000000, 0x00000000, MMIO)
}) /* End Name(_SB.PCI0.CRES) */

Method(_CRS, 0) {
	/* DBGO("\\_SB\\PCI0\\_CRS\n") */
	CreateDWordField(CRES, ^MMIO._BAS, MM1B)
	CreateDWordField(CRES, ^MMIO._LEN, MM1L)

	/*
	 * Declare memory between TOM1 and 4GB as available
	 * for PCI MMIO.
	 * Use ShiftLeft to avoid 64bit constant (for XP).
	 * This will work even if the OS does 32bit arithmetic, as
	 * 32bit (0x00000000 - TOM1) will wrap and give the same
	 * result as 64bit (0x100000000 - TOM1).
	 */
	Store(TOM1, MM1B)
	ShiftLeft(0x10000000, 4, Local0)
	Subtract(Local0, TOM1, Local0)
	Store(Local0, MM1L)

	Return(CRES) /* note to change the Name buffer */
} /* end of Method(_SB.PCI0._CRS) */

/*
 *
 *               FIRST METHOD CALLED UPON BOOT
 *
 *  1. If debugging, print current OS and ACPI interpreter.
 *  2. Get PCI Interrupt routing from ACPI VSM, this
 *     value is based on user choice in BIOS setup.
 */
Method(_INI, 0) {
	/* DBGO("\\_SB\\_INI\n") */
	/* DBGO("   DSDT.ASL code from ") */
	/* DBGO(__DATE__) */
	/* DBGO(" ") */
	/* DBGO(__TIME__) */
	/* DBGO("\n   Sleep states supported: ") */
	/* DBGO("\n") */
	/* DBGO("   \\_OS=") */
	/* DBGO(\_OS) */
	/* DBGO("\n   \\_REV=") */
	/* DBGO(\_REV) */
	/* DBGO("\n") */

	/* Determine the OS we're running on */
	OSFL()

#if IS_ENABLED(CONFIG_ACPI_ENABLE_THERMAL_ZONE)
	/* TODO: It is unstable. */
	#include "acpi/AmdImc.asl" /* Hudson IMC function */
	ITZE() /* enable IMC Fan Control*/
#endif
} /* End Method(_SB._INI) */

Method(OSFL, 0){

	if (LNotEqual(OSVR, Ones)) {Return(OSVR)}	/* OS version was already detected */

	if (CondRefOf(\_OSI))
	{
		Store(1, OSVR)					/* Assume some form of XP */
		if (\_OSI("Windows 2006"))		/* Vista */
		{
			Store(2, OSVR)
		}
	} else {
		If(WCMP(\_OS,"Linux")) {
			Store(3, OSVR)				/* Linux */
		} Else {
			Store(4, OSVR)				/* Gotta be WinCE */
		}
	}
	Return(OSVR)
}