hwacpi.c revision 77424
171867Smsmith 267754Smsmith/****************************************************************************** 367754Smsmith * 471867Smsmith * Module Name: hwacpi - ACPI Hardware Initialization/Mode Interface 577424Smsmith * $Revision: 40 $ 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 15777424Smsmith DEBUG_PRINTP (ACPI_ERROR, ("No FADT!\n")); 15867754Smsmith 15967754Smsmith return_ACPI_STATUS (AE_NO_ACPI_TABLES); 16067754Smsmith } 16167754Smsmith 16267754Smsmith /* Must support *some* mode! */ 16367754Smsmith/* 16467754Smsmith if (!(SystemFlags & SYS_MODES_MASK)) 16567754Smsmith { 16667754Smsmith RestoreAcpiChipset = FALSE; 16767754Smsmith 16877424Smsmith DEBUG_PRINTP (ACPI_ERROR, 16977424Smsmith ("Supported modes uninitialized!\n")); 17067754Smsmith return_ACPI_STATUS (AE_ERROR); 17167754Smsmith } 17267754Smsmith 17367754Smsmith*/ 17467754Smsmith 17567754Smsmith 17667754Smsmith switch (AcpiGbl_SystemFlags & SYS_MODES_MASK) 17767754Smsmith { 17867754Smsmith /* Identify current ACPI/legacy mode */ 17967754Smsmith 18067754Smsmith case (SYS_MODE_ACPI): 18167754Smsmith 18267754Smsmith AcpiGbl_OriginalMode = SYS_MODE_ACPI; 18377424Smsmith DEBUG_PRINTP (ACPI_INFO, ("System supports ACPI mode only.\n")); 18467754Smsmith break; 18567754Smsmith 18667754Smsmith 18767754Smsmith case (SYS_MODE_LEGACY): 18867754Smsmith 18967754Smsmith AcpiGbl_OriginalMode = SYS_MODE_LEGACY; 19077424Smsmith DEBUG_PRINTP (ACPI_INFO, 19167754Smsmith ("Tables loaded from buffer, hardware assumed to support LEGACY mode only.\n")); 19267754Smsmith break; 19367754Smsmith 19467754Smsmith 19567754Smsmith case (SYS_MODE_ACPI | SYS_MODE_LEGACY): 19667754Smsmith 19767754Smsmith if (AcpiHwGetMode () == SYS_MODE_ACPI) 19867754Smsmith { 19967754Smsmith AcpiGbl_OriginalMode = SYS_MODE_ACPI; 20067754Smsmith } 20167754Smsmith else 20267754Smsmith { 20367754Smsmith AcpiGbl_OriginalMode = SYS_MODE_LEGACY; 20467754Smsmith } 20567754Smsmith 20677424Smsmith DEBUG_PRINTP (ACPI_INFO, 20767754Smsmith ("System supports both ACPI and LEGACY modes.\n")); 20867754Smsmith 20977424Smsmith DEBUG_PRINTP (ACPI_INFO, 21067754Smsmith ("System is currently in %s mode.\n", 21167754Smsmith (AcpiGbl_OriginalMode == SYS_MODE_ACPI) ? "ACPI" : "LEGACY")); 21267754Smsmith break; 21367754Smsmith } 21467754Smsmith 21567754Smsmith 21667754Smsmith if (AcpiGbl_SystemFlags & SYS_MODE_ACPI) 21767754Smsmith { 21867754Smsmith /* Target system supports ACPI mode */ 21967754Smsmith 22067754Smsmith /* 22169450Smsmith * The purpose of this code is to save the initial state 22267754Smsmith * of the ACPI event enable registers. An exit function will be 22367754Smsmith * registered which will restore this state when the application 22467754Smsmith * exits. The exit function will also clear all of the ACPI event 22567754Smsmith * status bits prior to restoring the original mode. 22667754Smsmith * 22767754Smsmith * The location of the PM1aEvtBlk enable registers is defined as the 22869450Smsmith * base of PM1aEvtBlk + DIV_2(PM1aEvtBlkLength). Since the spec further 22967754Smsmith * fully defines the PM1aEvtBlk to be a total of 4 bytes, the offset 23067754Smsmith * for the enable registers is always 2 from the base. It is hard 23167754Smsmith * coded here. If this changes in the spec, this code will need to 23267754Smsmith * be modified. The PM1bEvtBlk behaves as expected. 23367754Smsmith */ 23467754Smsmith 23569450Smsmith AcpiGbl_Pm1EnableRegisterSave = (UINT16) AcpiHwRegisterRead (ACPI_MTX_LOCK, PM1_EN); 23667754Smsmith 23767754Smsmith 23867754Smsmith /* 23967754Smsmith * The GPEs behave similarly, except that the length of the register 24067754Smsmith * block is not fixed, so the buffer must be allocated with malloc 24167754Smsmith */ 24267754Smsmith 24371867Smsmith if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XGpe0Blk.Address) && 24470243Smsmith AcpiGbl_FADT->Gpe0BlkLen) 24567754Smsmith { 24669450Smsmith /* GPE0 specified in FADT */ 24767754Smsmith 24867754Smsmith AcpiGbl_Gpe0EnableRegisterSave = 24977424Smsmith AcpiUtAllocate (DIV_2 (AcpiGbl_FADT->Gpe0BlkLen)); 25067754Smsmith if (!AcpiGbl_Gpe0EnableRegisterSave) 25167754Smsmith { 25267754Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 25367754Smsmith } 25467754Smsmith 25567754Smsmith /* Save state of GPE0 enable bits */ 25667754Smsmith 25769450Smsmith for (Index = 0; Index < DIV_2 (AcpiGbl_FADT->Gpe0BlkLen); Index++) 25867754Smsmith { 25967754Smsmith AcpiGbl_Gpe0EnableRegisterSave[Index] = 26069450Smsmith (UINT8) AcpiHwRegisterRead (ACPI_MTX_LOCK, GPE0_EN_BLOCK | Index); 26167754Smsmith } 26267754Smsmith } 26367754Smsmith 26467754Smsmith else 26567754Smsmith { 26667754Smsmith AcpiGbl_Gpe0EnableRegisterSave = NULL; 26767754Smsmith } 26867754Smsmith 26971867Smsmith if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XGpe1Blk.Address) && 27070243Smsmith AcpiGbl_FADT->Gpe1BlkLen) 27167754Smsmith { 27267754Smsmith /* GPE1 defined */ 27367754Smsmith 27467754Smsmith AcpiGbl_Gpe1EnableRegisterSave = 27577424Smsmith AcpiUtAllocate (DIV_2 (AcpiGbl_FADT->Gpe1BlkLen)); 27667754Smsmith if (!AcpiGbl_Gpe1EnableRegisterSave) 27767754Smsmith { 27867754Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 27967754Smsmith } 28067754Smsmith 28167754Smsmith /* save state of GPE1 enable bits */ 28267754Smsmith 28369450Smsmith for (Index = 0; Index < DIV_2 (AcpiGbl_FADT->Gpe1BlkLen); Index++) 28467754Smsmith { 28567754Smsmith AcpiGbl_Gpe1EnableRegisterSave[Index] = 28669450Smsmith (UINT8) AcpiHwRegisterRead (ACPI_MTX_LOCK, GPE1_EN_BLOCK | Index); 28767754Smsmith } 28867754Smsmith } 28967754Smsmith 29067754Smsmith else 29167754Smsmith { 29267754Smsmith AcpiGbl_Gpe1EnableRegisterSave = NULL; 29367754Smsmith } 29467754Smsmith } 29567754Smsmith 29667754Smsmith return_ACPI_STATUS (Status); 29767754Smsmith} 29867754Smsmith 29967754Smsmith 30067754Smsmith/****************************************************************************** 30167754Smsmith * 30267754Smsmith * FUNCTION: AcpiHwSetMode 30367754Smsmith * 30467754Smsmith * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY 30567754Smsmith * 30667754Smsmith * RETURN: Status 30767754Smsmith * 30867754Smsmith * DESCRIPTION: Transitions the system into the requested mode or does nothing 30967754Smsmith * if the system is already in that mode. 31067754Smsmith * 31167754Smsmith ******************************************************************************/ 31267754Smsmith 31367754SmsmithACPI_STATUS 31467754SmsmithAcpiHwSetMode ( 31567754Smsmith UINT32 Mode) 31667754Smsmith{ 31767754Smsmith 31877424Smsmith ACPI_STATUS Status = AE_NO_HARDWARE_RESPONSE; 31967754Smsmith 32067754Smsmith FUNCTION_TRACE ("HwSetMode"); 32167754Smsmith 32267754Smsmith 32367754Smsmith if (Mode == SYS_MODE_ACPI) 32467754Smsmith { 32567754Smsmith /* BIOS should have disabled ALL fixed and GP events */ 32667754Smsmith 32769450Smsmith AcpiOsOut8 (AcpiGbl_FADT->SmiCmd, AcpiGbl_FADT->AcpiEnable); 32877424Smsmith DEBUG_PRINTP (ACPI_INFO, ("Attempting to enable ACPI mode\n")); 32967754Smsmith } 33067754Smsmith 33167754Smsmith else if (Mode == SYS_MODE_LEGACY) 33267754Smsmith { 33367754Smsmith /* 33467754Smsmith * BIOS should clear all fixed status bits and restore fixed event 33567754Smsmith * enable bits to default 33667754Smsmith */ 33767754Smsmith 33869450Smsmith AcpiOsOut8 (AcpiGbl_FADT->SmiCmd, AcpiGbl_FADT->AcpiDisable); 33977424Smsmith DEBUG_PRINTP (ACPI_INFO, 34067754Smsmith ("Attempting to enable Legacy (non-ACPI) mode\n")); 34167754Smsmith } 34267754Smsmith 34367754Smsmith if (AcpiHwGetMode () == Mode) 34467754Smsmith { 34577424Smsmith DEBUG_PRINTP (ACPI_INFO, ("Mode %X successfully enabled\n", Mode)); 34667754Smsmith Status = AE_OK; 34767754Smsmith } 34867754Smsmith 34967754Smsmith return_ACPI_STATUS (Status); 35067754Smsmith} 35167754Smsmith 35267754Smsmith 35367754Smsmith/****************************************************************************** 35467754Smsmith * 35567754Smsmith * FUNCTION: AcpiHwGetMode 35667754Smsmith * 35767754Smsmith * PARAMETERS: none 35867754Smsmith * 35967754Smsmith * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY 36067754Smsmith * 36167754Smsmith * DESCRIPTION: Return current operating state of system. Determined by 36267754Smsmith * querying the SCI_EN bit. 36367754Smsmith * 36467754Smsmith ******************************************************************************/ 36567754Smsmith 36667754SmsmithUINT32 36767754SmsmithAcpiHwGetMode (void) 36867754Smsmith{ 36967754Smsmith 37067754Smsmith FUNCTION_TRACE ("HwGetMode"); 37167754Smsmith 37267754Smsmith 37369450Smsmith if (AcpiHwRegisterBitAccess (ACPI_READ, ACPI_MTX_LOCK, SCI_EN)) 37467754Smsmith { 37567754Smsmith return_VALUE (SYS_MODE_ACPI); 37667754Smsmith } 37767754Smsmith else 37867754Smsmith { 37967754Smsmith return_VALUE (SYS_MODE_LEGACY); 38067754Smsmith } 38167754Smsmith} 38267754Smsmith 38367754Smsmith/****************************************************************************** 38467754Smsmith * 38567754Smsmith * FUNCTION: AcpiHwGetModeCapabilities 38667754Smsmith * 38767754Smsmith * PARAMETERS: none 38867754Smsmith * 38967754Smsmith * RETURN: logical OR of SYS_MODE_ACPI and SYS_MODE_LEGACY determined at initial 39067754Smsmith * system state. 39167754Smsmith * 39267754Smsmith * DESCRIPTION: Returns capablities of system 39367754Smsmith * 39467754Smsmith ******************************************************************************/ 39567754Smsmith 39667754SmsmithUINT32 39767754SmsmithAcpiHwGetModeCapabilities (void) 39867754Smsmith{ 39967754Smsmith 40067754Smsmith FUNCTION_TRACE ("HwGetModeCapabilities"); 40167754Smsmith 40267754Smsmith 40367754Smsmith if (!(AcpiGbl_SystemFlags & SYS_MODES_MASK)) 40467754Smsmith { 40567754Smsmith if (AcpiHwGetMode () == SYS_MODE_LEGACY) 40667754Smsmith { 40767754Smsmith /* 40867754Smsmith * Assume that if this call is being made, AcpiInit has been called 40967754Smsmith * and ACPI support has been established by the presence of the 41067754Smsmith * tables. Therefore since we're in SYS_MODE_LEGACY, the system 41167754Smsmith * must support both modes 41267754Smsmith */ 41367754Smsmith 41467754Smsmith AcpiGbl_SystemFlags |= (SYS_MODE_ACPI | SYS_MODE_LEGACY); 41567754Smsmith } 41667754Smsmith 41767754Smsmith else 41867754Smsmith { 41967754Smsmith /* TBD: [Investigate] !!! this may be unsafe... */ 42067754Smsmith /* 42167754Smsmith * system is is ACPI mode, so try to switch back to LEGACY to see if 42267754Smsmith * it is supported 42367754Smsmith */ 42467754Smsmith AcpiHwSetMode (SYS_MODE_LEGACY); 42567754Smsmith 42667754Smsmith if (AcpiHwGetMode () == SYS_MODE_LEGACY) 42767754Smsmith { 42867754Smsmith /* Now in SYS_MODE_LEGACY, so both are supported */ 42967754Smsmith 43067754Smsmith AcpiGbl_SystemFlags |= (SYS_MODE_ACPI | SYS_MODE_LEGACY); 43167754Smsmith AcpiHwSetMode (SYS_MODE_ACPI); 43267754Smsmith } 43367754Smsmith 43467754Smsmith else 43567754Smsmith { 43667754Smsmith /* Still in SYS_MODE_ACPI so this must be an ACPI only system */ 43767754Smsmith 43867754Smsmith AcpiGbl_SystemFlags |= SYS_MODE_ACPI; 43967754Smsmith } 44067754Smsmith } 44167754Smsmith } 44267754Smsmith 44367754Smsmith return_VALUE (AcpiGbl_SystemFlags & SYS_MODES_MASK); 44467754Smsmith} 44567754Smsmith 44667754Smsmith 447