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tbdata.c
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tbfadt.c
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Editing: tbfadt.c
/****************************************************************************** * * Module Name: tbfadt - FADT table utilities * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2020, 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. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include <contrib/dev/acpica/include/acpi.h> #include <contrib/dev/acpica/include/accommon.h> #include <contrib/dev/acpica/include/actables.h> #define _COMPONENT ACPI_TABLES ACPI_MODULE_NAME ("tbfadt") /* Local prototypes */ static void AcpiTbInitGenericAddress ( ACPI_GENERIC_ADDRESS *GenericAddress, UINT8 SpaceId, UINT8 ByteWidth, UINT64 Address, const char *RegisterName, UINT8 Flags); static void AcpiTbConvertFadt ( void); static void AcpiTbSetupFadtRegisters ( void); static UINT64 AcpiTbSelectAddress ( char *RegisterName, UINT32 Address32, UINT64 Address64); /* Table for conversion of FADT to common internal format and FADT validation */ typedef struct acpi_fadt_info { const char *Name; UINT16 Address64; UINT16 Address32; UINT16 Length; UINT8 DefaultLength; UINT8 Flags; } ACPI_FADT_INFO; #define ACPI_FADT_OPTIONAL 0 #define ACPI_FADT_REQUIRED 1 #define ACPI_FADT_SEPARATE_LENGTH 2 #define ACPI_FADT_GPE_REGISTER 4 static ACPI_FADT_INFO FadtInfoTable[] = { {"Pm1aEventBlock", ACPI_FADT_OFFSET (XPm1aEventBlock), ACPI_FADT_OFFSET (Pm1aEventBlock), ACPI_FADT_OFFSET (Pm1EventLength), ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ ACPI_FADT_REQUIRED}, {"Pm1bEventBlock", ACPI_FADT_OFFSET (XPm1bEventBlock), ACPI_FADT_OFFSET (Pm1bEventBlock), ACPI_FADT_OFFSET (Pm1EventLength), ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ ACPI_FADT_OPTIONAL}, {"Pm1aControlBlock", ACPI_FADT_OFFSET (XPm1aControlBlock), ACPI_FADT_OFFSET (Pm1aControlBlock), ACPI_FADT_OFFSET (Pm1ControlLength), ACPI_PM1_REGISTER_WIDTH, ACPI_FADT_REQUIRED}, {"Pm1bControlBlock", ACPI_FADT_OFFSET (XPm1bControlBlock), ACPI_FADT_OFFSET (Pm1bControlBlock), ACPI_FADT_OFFSET (Pm1ControlLength), ACPI_PM1_REGISTER_WIDTH, ACPI_FADT_OPTIONAL}, {"Pm2ControlBlock", ACPI_FADT_OFFSET (XPm2ControlBlock), ACPI_FADT_OFFSET (Pm2ControlBlock), ACPI_FADT_OFFSET (Pm2ControlLength), ACPI_PM2_REGISTER_WIDTH, ACPI_FADT_SEPARATE_LENGTH}, {"PmTimerBlock", ACPI_FADT_OFFSET (XPmTimerBlock), ACPI_FADT_OFFSET (PmTimerBlock), ACPI_FADT_OFFSET (PmTimerLength), ACPI_PM_TIMER_WIDTH, ACPI_FADT_SEPARATE_LENGTH}, /* ACPI 5.0A: Timer is optional */ {"Gpe0Block", ACPI_FADT_OFFSET (XGpe0Block), ACPI_FADT_OFFSET (Gpe0Block), ACPI_FADT_OFFSET (Gpe0BlockLength), 0, ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER}, {"Gpe1Block", ACPI_FADT_OFFSET (XGpe1Block), ACPI_FADT_OFFSET (Gpe1Block), ACPI_FADT_OFFSET (Gpe1BlockLength), 0, ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER} }; #define ACPI_FADT_INFO_ENTRIES \ (sizeof (FadtInfoTable) / sizeof (ACPI_FADT_INFO)) /* Table used to split Event Blocks into separate status/enable registers */ typedef struct acpi_fadt_pm_info { ACPI_GENERIC_ADDRESS *Target; UINT16 Source; UINT8 RegisterNum; } ACPI_FADT_PM_INFO; static ACPI_FADT_PM_INFO FadtPmInfoTable[] = { {&AcpiGbl_XPm1aStatus, ACPI_FADT_OFFSET (XPm1aEventBlock), 0}, {&AcpiGbl_XPm1aEnable, ACPI_FADT_OFFSET (XPm1aEventBlock), 1}, {&AcpiGbl_XPm1bStatus, ACPI_FADT_OFFSET (XPm1bEventBlock), 0}, {&AcpiGbl_XPm1bEnable, ACPI_FADT_OFFSET (XPm1bEventBlock), 1} }; #define ACPI_FADT_PM_INFO_ENTRIES \ (sizeof (FadtPmInfoTable) / sizeof (ACPI_FADT_PM_INFO)) /******************************************************************************* * * FUNCTION: AcpiTbInitGenericAddress * * PARAMETERS: GenericAddress - GAS struct to be initialized * SpaceId - ACPI Space ID for this register * ByteWidth - Width of this register * Address - Address of the register * RegisterName - ASCII name of the ACPI register * * RETURN: None * * DESCRIPTION: Initialize a Generic Address Structure (GAS) * See the ACPI specification for a full description and * definition of this structure. * ******************************************************************************/ static void AcpiTbInitGenericAddress ( ACPI_GENERIC_ADDRESS *GenericAddress, UINT8 SpaceId, UINT8 ByteWidth, UINT64 Address, const char *RegisterName, UINT8 Flags) { UINT8 BitWidth; /* * Bit width field in the GAS is only one byte long, 255 max. * Check for BitWidth overflow in GAS. */ BitWidth = (UINT8) (ByteWidth * 8); if (ByteWidth > 31) /* (31*8)=248, (32*8)=256 */ { /* * No error for GPE blocks, because we do not use the BitWidth * for GPEs, the legacy length (ByteWidth) is used instead to * allow for a large number of GPEs. */ if (!(Flags & ACPI_FADT_GPE_REGISTER)) { ACPI_ERROR ((AE_INFO, "%s - 32-bit FADT register is too long (%u bytes, %u bits) " "to convert to GAS struct - 255 bits max, truncating", RegisterName, ByteWidth, (ByteWidth * 8))); } BitWidth = 255; } /* * The 64-bit Address field is non-aligned in the byte packed * GAS struct. */ ACPI_MOVE_64_TO_64 (&GenericAddress->Address, &Address); /* All other fields are byte-wide */ GenericAddress->SpaceId = SpaceId; GenericAddress->BitWidth = BitWidth; GenericAddress->BitOffset = 0; GenericAddress->AccessWidth = 0; /* Access width ANY */ } /******************************************************************************* * * FUNCTION: AcpiTbSelectAddress * * PARAMETERS: RegisterName - ASCII name of the ACPI register * Address32 - 32-bit address of the register * Address64 - 64-bit address of the register * * RETURN: The resolved 64-bit address * * DESCRIPTION: Select between 32-bit and 64-bit versions of addresses within * the FADT. Used for the FACS and DSDT addresses. * * NOTES: * * Check for FACS and DSDT address mismatches. An address mismatch between * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and * DSDT/X_DSDT) could be a corrupted address field or it might indicate * the presence of two FACS or two DSDT tables. * * November 2013: * By default, as per the ACPICA specification, a valid 64-bit address is * used regardless of the value of the 32-bit address. However, this * behavior can be overridden via the AcpiGbl_Use32BitFadtAddresses flag. * ******************************************************************************/ static UINT64 AcpiTbSelectAddress ( char *RegisterName, UINT32 Address32, UINT64 Address64) { if (!Address64) { /* 64-bit address is zero, use 32-bit address */ return ((UINT64) Address32); } if (Address32 && (Address64 != (UINT64) Address32)) { /* Address mismatch between 32-bit and 64-bit versions */ ACPI_BIOS_WARNING ((AE_INFO, "32/64X %s address mismatch in FADT: " "0x%8.8X/0x%8.8X%8.8X, using %u-bit address", RegisterName, Address32, ACPI_FORMAT_UINT64 (Address64), AcpiGbl_Use32BitFadtAddresses ? 32 : 64)); /* 32-bit address override */ if (AcpiGbl_Use32BitFadtAddresses) { return ((UINT64) Address32); } } /* Default is to use the 64-bit address */ return (Address64); } /******************************************************************************* * * FUNCTION: AcpiTbParseFadt * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Initialize the FADT, DSDT and FACS tables * (FADT contains the addresses of the DSDT and FACS) * ******************************************************************************/ void AcpiTbParseFadt ( void) { UINT32 Length; ACPI_TABLE_HEADER *Table; ACPI_TABLE_DESC *FadtDesc; ACPI_STATUS Status; /* * The FADT has multiple versions with different lengths, * and it contains pointers to both the DSDT and FACS tables. * * Get a local copy of the FADT and convert it to a common format * Map entire FADT, assumed to be smaller than one page. */ FadtDesc = &AcpiGbl_RootTableList.Tables[AcpiGbl_FadtIndex]; Status = AcpiTbGetTable (FadtDesc, &Table); if (ACPI_FAILURE (Status)) { return; } Length = FadtDesc->Length; /* * Validate the FADT checksum before we copy the table. Ignore * checksum error as we want to try to get the DSDT and FACS. */ (void) AcpiTbVerifyChecksum (Table, Length); /* Create a local copy of the FADT in common ACPI 2.0+ format */ AcpiTbCreateLocalFadt (Table, Length); /* All done with the real FADT, unmap it */ AcpiTbPutTable (FadtDesc); /* Obtain the DSDT and FACS tables via their addresses within the FADT */ AcpiTbInstallStandardTable ( (ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XDsdt, ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE, &AcpiGbl_DsdtIndex); /* If Hardware Reduced flag is set, there is no FACS */ if (!AcpiGbl_ReducedHardware) { if (AcpiGbl_FADT.Facs) { AcpiTbInstallStandardTable ( (ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.Facs, ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE, &AcpiGbl_FacsIndex); } if (AcpiGbl_FADT.XFacs) { AcpiTbInstallStandardTable ( (ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XFacs, ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE, &AcpiGbl_XFacsIndex); } } } /******************************************************************************* * * FUNCTION: AcpiTbCreateLocalFadt * * PARAMETERS: Table - Pointer to BIOS FADT * Length - Length of the table * * RETURN: None * * DESCRIPTION: Get a local copy of the FADT and convert it to a common format. * Performs validation on some important FADT fields. * * NOTE: We create a local copy of the FADT regardless of the version. * ******************************************************************************/ void AcpiTbCreateLocalFadt ( ACPI_TABLE_HEADER *Table, UINT32 Length) { /* * Check if the FADT is larger than the largest table that we expect * (typically the current ACPI specification version). If so, truncate * the table, and issue a warning. */ if (Length > sizeof (ACPI_TABLE_FADT)) { ACPI_BIOS_WARNING ((AE_INFO, "FADT (revision %u) is longer than %s length, " "truncating length %u to %u", Table->Revision, ACPI_FADT_CONFORMANCE, Length, (UINT32) sizeof (ACPI_TABLE_FADT))); } /* Clear the entire local FADT */ memset (&AcpiGbl_FADT, 0, sizeof (ACPI_TABLE_FADT)); /* Copy the original FADT, up to sizeof (ACPI_TABLE_FADT) */ memcpy (&AcpiGbl_FADT, Table, ACPI_MIN (Length, sizeof (ACPI_TABLE_FADT))); /* Take a copy of the Hardware Reduced flag */ AcpiGbl_ReducedHardware = FALSE; if (AcpiGbl_FADT.Flags & ACPI_FADT_HW_REDUCED) { AcpiGbl_ReducedHardware = TRUE; } /* Convert the local copy of the FADT to the common internal format */ AcpiTbConvertFadt (); /* Initialize the global ACPI register structures */ AcpiTbSetupFadtRegisters (); } /******************************************************************************* * * FUNCTION: AcpiTbConvertFadt * * PARAMETERS: None - AcpiGbl_FADT is used. * * RETURN: None * * DESCRIPTION: Converts all versions of the FADT to a common internal format. * Expand 32-bit addresses to 64-bit as necessary. Also validate * important fields within the FADT. * * NOTE: AcpiGbl_FADT must be of size (ACPI_TABLE_FADT), and must * contain a copy of the actual BIOS-provided FADT. * * Notes on 64-bit register addresses: * * After this FADT conversion, later ACPICA code will only use the 64-bit "X" * fields of the FADT for all ACPI register addresses. * * The 64-bit X fields are optional extensions to the original 32-bit FADT * V1.0 fields. Even if they are present in the FADT, they are optional and * are unused if the BIOS sets them to zero. Therefore, we must copy/expand * 32-bit V1.0 fields to the 64-bit X fields if the 64-bit X field is originally * zero. * * For ACPI 1.0 FADTs (that contain no 64-bit addresses), all 32-bit address * fields are expanded to the corresponding 64-bit X fields in the internal * common FADT. * * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded * to the corresponding 64-bit X fields, if the 64-bit field is originally * zero. Adhering to the ACPI specification, we completely ignore the 32-bit * field if the 64-bit field is valid, regardless of whether the host OS is * 32-bit or 64-bit. * * Possible additional checks: * (AcpiGbl_FADT.Pm1EventLength >= 4) * (AcpiGbl_FADT.Pm1ControlLength >= 2) * (AcpiGbl_FADT.PmTimerLength >= 4) * Gpe block lengths must be multiple of 2 * ******************************************************************************/ static void AcpiTbConvertFadt ( void) { const char *Name; ACPI_GENERIC_ADDRESS *Address64; UINT32 Address32; UINT8 Length; UINT8 Flags; UINT32 i; /* * For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which * should be zero are indeed zero. This will workaround BIOSs that * inadvertently place values in these fields. * * The ACPI 1.0 reserved fields that will be zeroed are the bytes located * at offset 45, 55, 95, and the word located at offset 109, 110. * * Note: The FADT revision value is unreliable. Only the length can be * trusted. */ if (AcpiGbl_FADT.Header.Length <= ACPI_FADT_V2_SIZE) { AcpiGbl_FADT.PreferredProfile = 0; AcpiGbl_FADT.PstateControl = 0; AcpiGbl_FADT.CstControl = 0; AcpiGbl_FADT.BootFlags = 0; } /* * Now we can update the local FADT length to the length of the * current FADT version as defined by the ACPI specification. * Thus, we will have a common FADT internally. */ AcpiGbl_FADT.Header.Length = sizeof (ACPI_TABLE_FADT); /* * Expand the 32-bit DSDT addresses to 64-bit as necessary. * Later ACPICA code will always use the X 64-bit field. */ AcpiGbl_FADT.XDsdt = AcpiTbSelectAddress ("DSDT", AcpiGbl_FADT.Dsdt, AcpiGbl_FADT.XDsdt); /* If Hardware Reduced flag is set, we are all done */ if (AcpiGbl_ReducedHardware) { return; } /* Examine all of the 64-bit extended address fields (X fields) */ for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { /* * Get the 32-bit and 64-bit addresses, as well as the register * length and register name. */ Address32 = *ACPI_ADD_PTR (UINT32, &AcpiGbl_FADT, FadtInfoTable[i].Address32); Address64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS, &AcpiGbl_FADT, FadtInfoTable[i].Address64); Length = *ACPI_ADD_PTR (UINT8, &AcpiGbl_FADT, FadtInfoTable[i].Length); Name = FadtInfoTable[i].Name; Flags = FadtInfoTable[i].Flags; /* * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X" * generic address structures as necessary. Later code will always use * the 64-bit address structures. * * November 2013: * Now always use the 64-bit address if it is valid (non-zero), in * accordance with the ACPI specification which states that a 64-bit * address supersedes the 32-bit version. This behavior can be * overridden by the AcpiGbl_Use32BitFadtAddresses flag. * * During 64-bit address construction and verification, * these cases are handled: * * Address32 zero, Address64 [don't care] - Use Address64 * * No override: if AcpiGbl_Use32BitFadtAddresses is FALSE, and: * Address32 non-zero, Address64 zero - Copy/use Address32 * Address32 non-zero == Address64 non-zero - Use Address64 * Address32 non-zero != Address64 non-zero - Warning, use Address64 * * Override: if AcpiGbl_Use32BitFadtAddresses is TRUE, and: * Address32 non-zero, Address64 zero - Copy/use Address32 * Address32 non-zero == Address64 non-zero - Copy/use Address32 * Address32 non-zero != Address64 non-zero - Warning, copy/use Address32 * * Note: SpaceId is always I/O for 32-bit legacy address fields */ if (Address32) { if (Address64->Address) { if (Address64->Address != (UINT64) Address32) { /* Address mismatch */ ACPI_BIOS_WARNING ((AE_INFO, "32/64X address mismatch in FADT/%s: " "0x%8.8X/0x%8.8X%8.8X, using %u-bit address", Name, Address32, ACPI_FORMAT_UINT64 (Address64->Address), AcpiGbl_Use32BitFadtAddresses ? 32 : 64)); } /* * For each extended field, check for length mismatch * between the legacy length field and the corresponding * 64-bit X length field. * Note: If the legacy length field is > 0xFF bits, ignore * this check. (GPE registers can be larger than the * 64-bit GAS structure can accommodate, 0xFF bits). */ if ((ACPI_MUL_8 (Length) <= ACPI_UINT8_MAX) && (Address64->BitWidth != ACPI_MUL_8 (Length))) { ACPI_BIOS_WARNING ((AE_INFO, "32/64X length mismatch in FADT/%s: %u/%u", Name, ACPI_MUL_8 (Length), Address64->BitWidth)); } } /* * Hardware register access code always uses the 64-bit fields. * So if the 64-bit field is zero or is to be overridden, * initialize it with the 32-bit fields. * Note that when the 32-bit address favor is specified, the * 64-bit fields are always re-initialized so that * AccessSize/BitWidth/BitOffset fields can be correctly * configured to the values to trigger a 32-bit compatible * access mode in the hardware register access code. */ if (!Address64->Address || AcpiGbl_Use32BitFadtAddresses) { AcpiTbInitGenericAddress (Address64, ACPI_ADR_SPACE_SYSTEM_IO, Length, (UINT64) Address32, Name, Flags); } } if (FadtInfoTable[i].Flags & ACPI_FADT_REQUIRED) { /* * Field is required (PM1aEvent, PM1aControl). * Both the address and length must be non-zero. */ if (!Address64->Address || !Length) { ACPI_BIOS_ERROR ((AE_INFO, "Required FADT field %s has zero address and/or length: " "0x%8.8X%8.8X/0x%X", Name, ACPI_FORMAT_UINT64 (Address64->Address), Length)); } } else if (FadtInfoTable[i].Flags & ACPI_FADT_SEPARATE_LENGTH) { /* * Field is optional (PM2Control, GPE0, GPE1) AND has its own * length field. If present, both the address and length must * be valid. */ if ((Address64->Address && !Length) || (!Address64->Address && Length)) { ACPI_BIOS_WARNING ((AE_INFO, "Optional FADT field %s has valid %s but zero %s: " "0x%8.8X%8.8X/0x%X", Name, (Length ? "Length" : "Address"), (Length ? "Address": "Length"), ACPI_FORMAT_UINT64 (Address64->Address), Length)); } } } } /******************************************************************************* * * FUNCTION: AcpiTbSetupFadtRegisters * * PARAMETERS: None, uses AcpiGbl_FADT. * * RETURN: None * * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally, * force FADT register definitions to their default lengths. * ******************************************************************************/ static void AcpiTbSetupFadtRegisters ( void) { ACPI_GENERIC_ADDRESS *Target64; ACPI_GENERIC_ADDRESS *Source64; UINT8 Pm1RegisterByteWidth; UINT32 i; /* * Optionally check all register lengths against the default values and * update them if they are incorrect. */ if (AcpiGbl_UseDefaultRegisterWidths) { for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { Target64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS, &AcpiGbl_FADT, FadtInfoTable[i].Address64); /* * If a valid register (Address != 0) and the (DefaultLength > 0) * (Not a GPE register), then check the width against the default. */ if ((Target64->Address) && (FadtInfoTable[i].DefaultLength > 0) && (FadtInfoTable[i].DefaultLength != Target64->BitWidth)) { ACPI_BIOS_WARNING ((AE_INFO, "Invalid length for FADT/%s: %u, using default %u", FadtInfoTable[i].Name, Target64->BitWidth, FadtInfoTable[i].DefaultLength)); /* Incorrect size, set width to the default */ Target64->BitWidth = FadtInfoTable[i].DefaultLength; } } } /* * Get the length of the individual PM1 registers (enable and status). * Each register is defined to be (event block length / 2). Extra divide * by 8 converts bits to bytes. */ Pm1RegisterByteWidth = (UINT8) ACPI_DIV_16 (AcpiGbl_FADT.XPm1aEventBlock.BitWidth); /* * Calculate separate GAS structs for the PM1x (A/B) Status and Enable * registers. These addresses do not appear (directly) in the FADT, so it * is useful to pre-calculate them from the PM1 Event Block definitions. * * The PM event blocks are split into two register blocks, first is the * PM Status Register block, followed immediately by the PM Enable * Register block. Each is of length (Pm1EventLength/2) * * Note: The PM1A event block is required by the ACPI specification. * However, the PM1B event block is optional and is rarely, if ever, * used. */ for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) { Source64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS, &AcpiGbl_FADT, FadtPmInfoTable[i].Source); if (Source64->Address) { AcpiTbInitGenericAddress (FadtPmInfoTable[i].Target, Source64->SpaceId, Pm1RegisterByteWidth, Source64->Address + (FadtPmInfoTable[i].RegisterNum * Pm1RegisterByteWidth), "PmRegisters", 0); } } }
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