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Diffstat (limited to 'sys/contrib/dev/acpica/Subsystem/Hardware/hwacpi.c')
| -rw-r--r-- | sys/contrib/dev/acpica/Subsystem/Hardware/hwacpi.c | 501 |
1 files changed, 501 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/Subsystem/Hardware/hwacpi.c b/sys/contrib/dev/acpica/Subsystem/Hardware/hwacpi.c new file mode 100644 index 0000000000000..e7096881a0fc8 --- /dev/null +++ b/sys/contrib/dev/acpica/Subsystem/Hardware/hwacpi.c @@ -0,0 +1,501 @@ +/****************************************************************************** + * + * Module Name: hwacpi - ACPI hardware functions - mode and timer + * $Revision: 24 $ + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999, Intel Corp. All rights + * reserved. + * + * 2. License + * + * 2.1. This is your license from Intel Corp. under its intellectual property + * rights. You may have additional license terms from the party that provided + * you this software, covering your right to use that party's intellectual + * property rights. + * + * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a + * copy of the source code appearing in this file ("Covered Code") an + * irrevocable, perpetual, worldwide license under Intel's copyrights in the + * base code distributed originally by Intel ("Original Intel Code") to copy, + * make derivatives, distribute, use and display any portion of the Covered + * Code in any form, with the right to sublicense such rights; and + * + * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent + * license (with the right to sublicense), under only those claims of Intel + * patents that are infringed by the Original Intel Code, to make, use, sell, + * offer to sell, and import the Covered Code and derivative works thereof + * solely to the minimum extent necessary to exercise the above copyright + * license, and in no event shall the patent license extend to any additions + * to or modifications of the Original Intel Code. No other license or right + * is granted directly or by implication, estoppel or otherwise; + * + * The above copyright and patent license is granted only if the following + * conditions are met: + * + * 3. Conditions + * + * 3.1. Redistribution of Source with Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification with rights to further distribute source must include + * the above Copyright Notice, the above License, this list of Conditions, + * and the following Disclaimer and Export Compliance provision. In addition, + * Licensee must cause all Covered Code to which Licensee contributes to + * contain a file documenting the changes Licensee made to create that Covered + * Code and the date of any change. Licensee must include in that file the + * documentation of any changes made by any predecessor Licensee. Licensee + * must include a prominent statement that the modification is derived, + * directly or indirectly, from Original Intel Code. + * + * 3.2. Redistribution of Source with no Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification without rights to further distribute source must + * include the following Disclaimer and Export Compliance provision in the + * documentation and/or other materials provided with distribution. In + * addition, Licensee may not authorize further sublicense of source of any + * portion of the Covered Code, and must include terms to the effect that the + * license from Licensee to its licensee is limited to the intellectual + * property embodied in the software Licensee provides to its licensee, and + * not to intellectual property embodied in modifications its licensee may + * make. + * + * 3.3. Redistribution of Executable. Redistribution in executable form of any + * substantial portion of the Covered Code or modification must reproduce the + * above Copyright Notice, and the following Disclaimer and Export Compliance + * provision in the documentation and/or other materials provided with the + * distribution. + * + * 3.4. Intel retains all right, title, and interest in and to the Original + * Intel Code. + * + * 3.5. Neither the name Intel nor any other trademark owned or controlled by + * Intel shall be used in advertising or otherwise to promote the sale, use or + * other dealings in products derived from or relating to the Covered Code + * without prior written authorization from Intel. + * + * 4. Disclaimer and Export Compliance + * + * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED + * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE + * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, + * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY + * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY + * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A + * PARTICULAR PURPOSE. + * + * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES + * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR + * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, + * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY + * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL + * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS + * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY + * LIMITED REMEDY. + * + * 4.3. Licensee shall not export, either directly or indirectly, any of this + * software or system incorporating such software without first obtaining any + * required license or other approval from the U. S. Department of Commerce or + * any other agency or department of the United States Government. In the + * event Licensee exports any such software from the United States or + * re-exports any such software from a foreign destination, Licensee shall + * ensure that the distribution and export/re-export of the software is in + * compliance with all laws, regulations, orders, or other restrictions of the + * U.S. Export Administration Regulations. Licensee agrees that neither it nor + * any of its subsidiaries will export/re-export any technical data, process, + * software, or service, directly or indirectly, to any country for which the + * United States government or any agency thereof requires an export license, + * other governmental approval, or letter of assurance, without first obtaining + * such license, approval or letter. + * + *****************************************************************************/ + +#define __HWACPI_C__ + +#include "acpi.h" +#include "achware.h" + + +#define _COMPONENT HARDWARE + MODULE_NAME ("hwacpi") + + +/****************************************************************************** + * + * FUNCTION: AcpiHwInitialize + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Initialize and validate various ACPI registers + * + ******************************************************************************/ + +ACPI_STATUS +AcpiHwInitialize ( + void) +{ + ACPI_STATUS Status = AE_OK; + UINT32 Index; + + + FUNCTION_TRACE ("HwInitialize"); + + + /* We must have the ACPI tables by the time we get here */ + + if (!AcpiGbl_FACP) + { + AcpiGbl_RestoreAcpiChipset = FALSE; + + DEBUG_PRINT (ACPI_ERROR, ("HwInitialize: No FACP!\n")); + + return_ACPI_STATUS (AE_NO_ACPI_TABLES); + } + + /* Must support *some* mode! */ +/* + if (!(SystemFlags & SYS_MODES_MASK)) + { + RestoreAcpiChipset = FALSE; + + DEBUG_PRINT (ACPI_ERROR, + ("CmHardwareInitialize: Supported modes uninitialized!\n")); + return_ACPI_STATUS (AE_ERROR); + } + +*/ + + + switch (AcpiGbl_SystemFlags & SYS_MODES_MASK) + { + /* Identify current ACPI/legacy mode */ + + case (SYS_MODE_ACPI): + + AcpiGbl_OriginalMode = SYS_MODE_ACPI; + DEBUG_PRINT (ACPI_INFO, ("System supports ACPI mode only.\n")); + break; + + + case (SYS_MODE_LEGACY): + + AcpiGbl_OriginalMode = SYS_MODE_LEGACY; + DEBUG_PRINT (ACPI_INFO, + ("Tables loaded from buffer, hardware assumed to support LEGACY mode only.\n")); + break; + + + case (SYS_MODE_ACPI | SYS_MODE_LEGACY): + + if (AcpiHwGetMode () == SYS_MODE_ACPI) + { + AcpiGbl_OriginalMode = SYS_MODE_ACPI; + } + else + { + AcpiGbl_OriginalMode = SYS_MODE_LEGACY; + } + + DEBUG_PRINT (ACPI_INFO, + ("System supports both ACPI and LEGACY modes.\n")); + + DEBUG_PRINT (ACPI_INFO, + ("System is currently in %s mode.\n", + (AcpiGbl_OriginalMode == SYS_MODE_ACPI) ? "ACPI" : "LEGACY")); + break; + } + + + if (AcpiGbl_SystemFlags & SYS_MODE_ACPI) + { + /* Target system supports ACPI mode */ + + /* + * The purpose of this block of code is to save the initial state + * of the ACPI event enable registers. An exit function will be + * registered which will restore this state when the application + * exits. The exit function will also clear all of the ACPI event + * status bits prior to restoring the original mode. + * + * The location of the PM1aEvtBlk enable registers is defined as the + * base of PM1aEvtBlk + PM1aEvtBlkLength / 2. Since the spec further + * fully defines the PM1aEvtBlk to be a total of 4 bytes, the offset + * for the enable registers is always 2 from the base. It is hard + * coded here. If this changes in the spec, this code will need to + * be modified. The PM1bEvtBlk behaves as expected. + */ + + AcpiGbl_Pm1EnableRegisterSave = + AcpiOsIn16 ((AcpiGbl_FACP->Pm1aEvtBlk + 2)); + if (AcpiGbl_FACP->Pm1bEvtBlk) + { + AcpiGbl_Pm1EnableRegisterSave |= + AcpiOsIn16 ((AcpiGbl_FACP->Pm1bEvtBlk + 2)); + } + + + /* + * The GPEs behave similarly, except that the length of the register + * block is not fixed, so the buffer must be allocated with malloc + */ + + if (AcpiGbl_FACP->Gpe0Blk && AcpiGbl_FACP->Gpe0BlkLen) + { + /* GPE0 specified in FACP */ + + AcpiGbl_Gpe0EnableRegisterSave = + AcpiCmAllocate (DIV_2 (AcpiGbl_FACP->Gpe0BlkLen)); + if (!AcpiGbl_Gpe0EnableRegisterSave) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Save state of GPE0 enable bits */ + + for (Index = 0; Index < DIV_2 (AcpiGbl_FACP->Gpe0BlkLen); Index++) + { + AcpiGbl_Gpe0EnableRegisterSave[Index] = + AcpiOsIn8 (AcpiGbl_FACP->Gpe0Blk + + DIV_2 (AcpiGbl_FACP->Gpe0BlkLen)); + } + } + + else + { + AcpiGbl_Gpe0EnableRegisterSave = NULL; + } + + if (AcpiGbl_FACP->Gpe1Blk && AcpiGbl_FACP->Gpe1BlkLen) + { + /* GPE1 defined */ + + AcpiGbl_Gpe1EnableRegisterSave = + AcpiCmAllocate (DIV_2 (AcpiGbl_FACP->Gpe1BlkLen)); + if (!AcpiGbl_Gpe1EnableRegisterSave) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* save state of GPE1 enable bits */ + + for (Index = 0; Index < DIV_2 (AcpiGbl_FACP->Gpe1BlkLen); Index++) + { + AcpiGbl_Gpe1EnableRegisterSave[Index] = + AcpiOsIn8 (AcpiGbl_FACP->Gpe1Blk + + DIV_2 (AcpiGbl_FACP->Gpe1BlkLen)); + } + } + + else + { + AcpiGbl_Gpe1EnableRegisterSave = NULL; + } + } + + return_ACPI_STATUS (Status); +} + + +/****************************************************************************** + * + * FUNCTION: AcpiHwSetMode + * + * PARAMETERS: Mode - SYS_MODE_ACPI or SYS_MODE_LEGACY + * + * RETURN: Status + * + * DESCRIPTION: Transitions the system into the requested mode or does nothing + * if the system is already in that mode. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiHwSetMode ( + UINT32 Mode) +{ + + ACPI_STATUS Status = AE_ERROR; + + FUNCTION_TRACE ("HwSetMode"); + + + if (Mode == SYS_MODE_ACPI) + { + /* BIOS should have disabled ALL fixed and GP events */ + + AcpiOsOut8 (AcpiGbl_FACP->SmiCmd, AcpiGbl_FACP->AcpiEnable); + DEBUG_PRINT (ACPI_INFO, ("Attempting to enable ACPI mode\n")); + } + + else if (Mode == SYS_MODE_LEGACY) + { + /* + * BIOS should clear all fixed status bits and restore fixed event + * enable bits to default + */ + + AcpiOsOut8 (AcpiGbl_FACP->SmiCmd, AcpiGbl_FACP->AcpiDisable); + DEBUG_PRINT (ACPI_INFO, + ("Attempting to enable Legacy (non-ACPI) mode\n")); + } + + if (AcpiHwGetMode () == Mode) + { + DEBUG_PRINT (ACPI_INFO, ("Mode %d successfully enabled\n", Mode)); + Status = AE_OK; + } + + return_ACPI_STATUS (Status); +} + + +/****************************************************************************** + * + * FUNCTION: AcpiHwGetMode + * + * PARAMETERS: none + * + * RETURN: SYS_MODE_ACPI or SYS_MODE_LEGACY + * + * DESCRIPTION: Return current operating state of system. Determined by + * querying the SCI_EN bit. + * + ******************************************************************************/ + +UINT32 +AcpiHwGetMode (void) +{ + + FUNCTION_TRACE ("HwGetMode"); + + + if (AcpiHwRegisterAccess (ACPI_READ, ACPI_MTX_LOCK, SCI_EN)) + { + return_VALUE (SYS_MODE_ACPI); + } + else + { + return_VALUE (SYS_MODE_LEGACY); + } +} + +/****************************************************************************** + * + * FUNCTION: AcpiHwGetModeCapabilities + * + * PARAMETERS: none + * + * RETURN: logical OR of SYS_MODE_ACPI and SYS_MODE_LEGACY determined at initial + * system state. + * + * DESCRIPTION: Returns capablities of system + * + ******************************************************************************/ + +UINT32 +AcpiHwGetModeCapabilities (void) +{ + + FUNCTION_TRACE ("HwGetModeCapabilities"); + + + if (!(AcpiGbl_SystemFlags & SYS_MODES_MASK)) + { + if (AcpiHwGetMode () == SYS_MODE_LEGACY) + { + /* + * Assume that if this call is being made, AcpiInit has been called + * and ACPI support has been established by the presence of the + * tables. Therefore since we're in SYS_MODE_LEGACY, the system + * must support both modes + */ + + AcpiGbl_SystemFlags |= (SYS_MODE_ACPI | SYS_MODE_LEGACY); + } + + else + { + /* TBD: [Investigate] !!! this may be unsafe... */ + /* + * system is is ACPI mode, so try to switch back to LEGACY to see if + * it is supported + */ + AcpiHwSetMode (SYS_MODE_LEGACY); + + if (AcpiHwGetMode () == SYS_MODE_LEGACY) + { + /* Now in SYS_MODE_LEGACY, so both are supported */ + + AcpiGbl_SystemFlags |= (SYS_MODE_ACPI | SYS_MODE_LEGACY); + AcpiHwSetMode (SYS_MODE_ACPI); + } + + else + { + /* Still in SYS_MODE_ACPI so this must be an ACPI only system */ + + AcpiGbl_SystemFlags |= SYS_MODE_ACPI; + } + } + } + + return_VALUE (AcpiGbl_SystemFlags & SYS_MODES_MASK); +} + + +/****************************************************************************** + * + * FUNCTION: AcpiHwPmtTicks + * + * PARAMETERS: none + * + * RETURN: Current value of the ACPI PMT (timer) + * + * DESCRIPTION: Obtains current value of ACPI PMT + * + ******************************************************************************/ + +UINT32 +AcpiHwPmtTicks (void) +{ + UINT32 Ticks; + + FUNCTION_TRACE ("AcpiPmtTicks"); + + Ticks = AcpiOsIn32 (AcpiGbl_FACP->PmTmrBlk); + + return_VALUE (Ticks); +} + + +/****************************************************************************** + * + * FUNCTION: AcpiHwPmtResolution + * + * PARAMETERS: none + * + * RETURN: Number of bits of resolution in the PMT (either 24 or 32) + * + * DESCRIPTION: Obtains resolution of the ACPI PMT (either 24bit or 32bit) + * + ******************************************************************************/ + +UINT32 +AcpiHwPmtResolution (void) +{ + FUNCTION_TRACE ("AcpiPmtResolution"); + + if (0 == AcpiGbl_FACP->TmrValExt) + { + return_VALUE (24); + } + + return_VALUE (32); +} + |