hwacpi.c revision 87031
171867Smsmith 267754Smsmith/****************************************************************************** 367754Smsmith * 471867Smsmith * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface 587031Smsmith * $Revision: 47 $ 667754Smsmith * 767754Smsmith *****************************************************************************/ 867754Smsmith 967754Smsmith/****************************************************************************** 1067754Smsmith * 1167754Smsmith * 1. Copyright Notice 1267754Smsmith * 1371867Smsmith * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp. 1470243Smsmith * All rights reserved. 1567754Smsmith * 1667754Smsmith * 2. License 1767754Smsmith * 1867754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1967754Smsmith * rights. You may have additional license terms from the party that provided 2067754Smsmith * you this software, covering your right to use that party's intellectual 2167754Smsmith * property rights. 2267754Smsmith * 2367754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2467754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2567754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2667754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2767754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2867754Smsmith * Code in any form, with the right to sublicense such rights; and 2967754Smsmith * 3067754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3167754Smsmith * license (with the right to sublicense), under only those claims of Intel 3267754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3367754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3467754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3567754Smsmith * license, and in no event shall the patent license extend to any additions 3667754Smsmith * to or modifications of the Original Intel Code. No other license or right 3767754Smsmith * is granted directly or by implication, estoppel or otherwise; 3867754Smsmith * 3967754Smsmith * The above copyright and patent license is granted only if the following 4067754Smsmith * conditions are met: 4167754Smsmith * 4267754Smsmith * 3. Conditions 4367754Smsmith * 4467754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4567754Smsmith * Redistribution of source code of any substantial portion of the Covered 4667754Smsmith * Code or modification with rights to further distribute source must include 4767754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4867754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4967754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 5067754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5167754Smsmith * Code and the date of any change. Licensee must include in that file the 5267754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5367754Smsmith * must include a prominent statement that the modification is derived, 5467754Smsmith * directly or indirectly, from Original Intel Code. 5567754Smsmith * 5667754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5767754Smsmith * Redistribution of source code of any substantial portion of the Covered 5867754Smsmith * Code or modification without rights to further distribute source must 5967754Smsmith * include the following Disclaimer and Export Compliance provision in the 6067754Smsmith * documentation and/or other materials provided with distribution. In 6167754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6267754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6367754Smsmith * license from Licensee to its licensee is limited to the intellectual 6467754Smsmith * property embodied in the software Licensee provides to its licensee, and 6567754Smsmith * not to intellectual property embodied in modifications its licensee may 6667754Smsmith * make. 6767754Smsmith * 6867754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6967754Smsmith * substantial portion of the Covered Code or modification must reproduce the 7067754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7167754Smsmith * provision in the documentation and/or other materials provided with the 7267754Smsmith * distribution. 7367754Smsmith * 7467754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7567754Smsmith * Intel Code. 7667754Smsmith * 7767754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7867754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7967754Smsmith * other dealings in products derived from or relating to the Covered Code 8067754Smsmith * without prior written authorization from Intel. 8167754Smsmith * 8267754Smsmith * 4. Disclaimer and Export Compliance 8367754Smsmith * 8467754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8567754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8667754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8767754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8867754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8967754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 9067754Smsmith * PARTICULAR PURPOSE. 9167754Smsmith * 9267754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9367754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9467754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9567754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9667754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9767754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9867754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9967754Smsmith * LIMITED REMEDY. 10067754Smsmith * 10167754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10267754Smsmith * software or system incorporating such software without first obtaining any 10367754Smsmith * required license or other approval from the U. S. Department of Commerce or 10467754Smsmith * any other agency or department of the United States Government. In the 10567754Smsmith * event Licensee exports any such software from the United States or 10667754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10767754Smsmith * ensure that the distribution and export/re-export of the software is in 10867754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10967754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 11067754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11167754Smsmith * software, or service, directly or indirectly, to any country for which the 11267754Smsmith * United States government or any agency thereof requires an export license, 11367754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11467754Smsmith * such license, approval or letter. 11567754Smsmith * 11667754Smsmith *****************************************************************************/ 11767754Smsmith 11867754Smsmith#define __HWACPI_C__ 11967754Smsmith 12067754Smsmith#include "acpi.h" 12167754Smsmith#include "achware.h" 12267754Smsmith 12367754Smsmith 12477424Smsmith#define _COMPONENT ACPI_HARDWARE 12567754Smsmith MODULE_NAME ("hwacpi") 12667754Smsmith 12767754Smsmith 12867754Smsmith/****************************************************************************** 12967754Smsmith * 13067754Smsmith * FUNCTION: AcpiHwInitialize 13167754Smsmith * 13267754Smsmith * PARAMETERS: None 13367754Smsmith * 13467754Smsmith * RETURN: Status 13567754Smsmith * 13667754Smsmith * DESCRIPTION: Initialize and validate various ACPI registers 13767754Smsmith * 13867754Smsmith ******************************************************************************/ 13967754Smsmith 14067754SmsmithACPI_STATUS 14167754SmsmithAcpiHwInitialize ( 14267754Smsmith void) 14367754Smsmith{ 14467754Smsmith ACPI_STATUS Status = AE_OK; 14567754Smsmith UINT32 Index; 14667754Smsmith 14767754Smsmith 14867754Smsmith FUNCTION_TRACE ("HwInitialize"); 14967754Smsmith 15067754Smsmith 15167754Smsmith /* We must have the ACPI tables by the time we get here */ 15267754Smsmith 15369450Smsmith if (!AcpiGbl_FADT) 15467754Smsmith { 15567754Smsmith AcpiGbl_RestoreAcpiChipset = FALSE; 15667754Smsmith 15782367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No FADT!\n")); 15867754Smsmith 15967754Smsmith return_ACPI_STATUS (AE_NO_ACPI_TABLES); 16067754Smsmith } 16187031Smsmith 16287031Smsmith /* 16387031Smsmith * Save the initial state of the ACPI event enable registers, so 16487031Smsmith * we can restore them when we exit. We probably won't exit, though. 16587031Smsmith * 16687031Smsmith * The location of the PM1aEvtBlk enable registers is defined as the 16787031Smsmith * base of PM1aEvtBlk + DIV_2(PM1aEvtBlkLength). Since the spec further 16887031Smsmith * fully defines the PM1aEvtBlk to be a total of 4 bytes, the offset 16987031Smsmith * for the enable registers is always 2 from the base. It is hard 17087031Smsmith * coded here. If this changes in the spec, this code will need to 17187031Smsmith * be modified. The PM1bEvtBlk behaves as expected. 17287031Smsmith */ 17387031Smsmith AcpiGbl_Pm1EnableRegisterSave = (UINT16) AcpiHwRegisterRead ( 17487031Smsmith ACPI_MTX_LOCK, PM1_EN); 17567754Smsmith 17667754Smsmith 17787031Smsmith /* 17887031Smsmith * The GPEs behave similarly, except that the length of the register 17987031Smsmith * block is not fixed, so the buffer must be allocated with malloc 18087031Smsmith */ 18187031Smsmith if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XGpe0Blk.Address) && 18287031Smsmith AcpiGbl_FADT->Gpe0BlkLen) 18367754Smsmith { 18487031Smsmith /* GPE0 specified in FADT */ 18567754Smsmith 18687031Smsmith AcpiGbl_Gpe0EnableRegisterSave = ACPI_MEM_ALLOCATE ( 18787031Smsmith DIV_2 (AcpiGbl_FADT->Gpe0BlkLen)); 18887031Smsmith if (!AcpiGbl_Gpe0EnableRegisterSave) 18987031Smsmith { 19087031Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 19187031Smsmith } 19267754Smsmith 19387031Smsmith /* Save state of GPE0 enable bits */ 19467754Smsmith 19587031Smsmith for (Index = 0; Index < DIV_2 (AcpiGbl_FADT->Gpe0BlkLen); Index++) 19667754Smsmith { 19787031Smsmith AcpiGbl_Gpe0EnableRegisterSave[Index] = 19887031Smsmith (UINT8) AcpiHwRegisterRead (ACPI_MTX_LOCK, GPE0_EN_BLOCK | Index); 19967754Smsmith } 20087031Smsmith } 20167754Smsmith 20287031Smsmith else 20387031Smsmith { 20487031Smsmith AcpiGbl_Gpe0EnableRegisterSave = NULL; 20567754Smsmith } 20667754Smsmith 20787031Smsmith if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XGpe1Blk.Address) && 20887031Smsmith AcpiGbl_FADT->Gpe1BlkLen) 20967754Smsmith { 21087031Smsmith /* GPE1 defined */ 21167754Smsmith 21287031Smsmith AcpiGbl_Gpe1EnableRegisterSave = ACPI_MEM_ALLOCATE ( 21387031Smsmith DIV_2 (AcpiGbl_FADT->Gpe1BlkLen)); 21487031Smsmith if (!AcpiGbl_Gpe1EnableRegisterSave) 21567754Smsmith { 21687031Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 21767754Smsmith } 21867754Smsmith 21987031Smsmith /* save state of GPE1 enable bits */ 22067754Smsmith 22187031Smsmith for (Index = 0; Index < DIV_2 (AcpiGbl_FADT->Gpe1BlkLen); Index++) 22267754Smsmith { 22387031Smsmith AcpiGbl_Gpe1EnableRegisterSave[Index] = 22487031Smsmith (UINT8) AcpiHwRegisterRead (ACPI_MTX_LOCK, GPE1_EN_BLOCK | Index); 22567754Smsmith } 22687031Smsmith } 22767754Smsmith 22887031Smsmith else 22987031Smsmith { 23087031Smsmith AcpiGbl_Gpe1EnableRegisterSave = NULL; 23167754Smsmith } 23267754Smsmith 23367754Smsmith return_ACPI_STATUS (Status); 23467754Smsmith} 23567754Smsmith 23667754Smsmith 23767754Smsmith/****************************************************************************** 23867754Smsmith * 23967754Smsmith * FUNCTION: AcpiHwSetMode 24067754Smsmith * 24167754Smsmith * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY 24267754Smsmith * 24367754Smsmith * RETURN: Status 24467754Smsmith * 24567754Smsmith * DESCRIPTION: Transitions the system into the requested mode or does nothing 24667754Smsmith * if the system is already in that mode. 24767754Smsmith * 24867754Smsmith ******************************************************************************/ 24967754Smsmith 25067754SmsmithACPI_STATUS 25167754SmsmithAcpiHwSetMode ( 25267754Smsmith UINT32 Mode) 25367754Smsmith{ 25467754Smsmith 25577424Smsmith ACPI_STATUS Status = AE_NO_HARDWARE_RESPONSE; 25667754Smsmith 25783174Smsmith 25867754Smsmith FUNCTION_TRACE ("HwSetMode"); 25967754Smsmith 26067754Smsmith 26167754Smsmith if (Mode == SYS_MODE_ACPI) 26267754Smsmith { 26367754Smsmith /* BIOS should have disabled ALL fixed and GP events */ 26467754Smsmith 26580062Smsmith AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, AcpiGbl_FADT->AcpiEnable, 8); 26682367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Attempting to enable ACPI mode\n")); 26767754Smsmith } 26867754Smsmith 26967754Smsmith else if (Mode == SYS_MODE_LEGACY) 27067754Smsmith { 27167754Smsmith /* 27267754Smsmith * BIOS should clear all fixed status bits and restore fixed event 27367754Smsmith * enable bits to default 27467754Smsmith */ 27580062Smsmith AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, AcpiGbl_FADT->AcpiDisable, 8); 27682367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 27782367Smsmith "Attempting to enable Legacy (non-ACPI) mode\n")); 27867754Smsmith } 27967754Smsmith 28083174Smsmith /* Give the platform some time to react */ 28183174Smsmith 28285756Smsmith AcpiOsStall (20000); 28383174Smsmith 28467754Smsmith if (AcpiHwGetMode () == Mode) 28567754Smsmith { 28682367Smsmith ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Mode %X successfully enabled\n", Mode)); 28767754Smsmith Status = AE_OK; 28867754Smsmith } 28967754Smsmith 29067754Smsmith return_ACPI_STATUS (Status); 29167754Smsmith} 29267754Smsmith 29367754Smsmith 29467754Smsmith/****************************************************************************** 29567754Smsmith * 29667754Smsmith * FUNCTION: AcpiHwGetMode 29767754Smsmith * 29867754Smsmith * PARAMETERS: none 29967754Smsmith * 30067754Smsmith * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY 30167754Smsmith * 30267754Smsmith * DESCRIPTION: Return current operating state of system. Determined by 30367754Smsmith * querying the SCI_EN bit. 30467754Smsmith * 30567754Smsmith ******************************************************************************/ 30667754Smsmith 30767754SmsmithUINT32 30867754SmsmithAcpiHwGetMode (void) 30967754Smsmith{ 31067754Smsmith 31167754Smsmith FUNCTION_TRACE ("HwGetMode"); 31267754Smsmith 31367754Smsmith 31469450Smsmith if (AcpiHwRegisterBitAccess (ACPI_READ, ACPI_MTX_LOCK, SCI_EN)) 31567754Smsmith { 31667754Smsmith return_VALUE (SYS_MODE_ACPI); 31767754Smsmith } 31867754Smsmith else 31967754Smsmith { 32067754Smsmith return_VALUE (SYS_MODE_LEGACY); 32167754Smsmith } 32267754Smsmith} 323