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Diffstat (limited to 'sys/contrib/dev/acpica/tables/tbfadt.c')
-rw-r--r-- | sys/contrib/dev/acpica/tables/tbfadt.c | 752 |
1 files changed, 752 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/tables/tbfadt.c b/sys/contrib/dev/acpica/tables/tbfadt.c new file mode 100644 index 0000000..c657a0b --- /dev/null +++ b/sys/contrib/dev/acpica/tables/tbfadt.c @@ -0,0 +1,752 @@ +/****************************************************************************** + * + * Module Name: tbfadt - FADT table utilities + * + *****************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2009, 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 __TBFADT_C__ + +#include "acpi.h" +#include "accommon.h" +#include "actables.h" + +#define _COMPONENT ACPI_TABLES + ACPI_MODULE_NAME ("tbfadt") + +/* Local prototypes */ + +static inline void +AcpiTbInitGenericAddress ( + ACPI_GENERIC_ADDRESS *GenericAddress, + UINT8 SpaceId, + UINT8 ByteWidth, + UINT64 Address); + +static void +AcpiTbConvertFadt ( + void); + +static void +AcpiTbValidateFadt ( + void); + +static void +AcpiTbSetupFadtRegisters ( + void); + + +/* Table for conversion of FADT to common internal format and FADT validation */ + +typedef struct acpi_fadt_info +{ + char *Name; + UINT8 Address64; + UINT8 Address32; + UINT8 Length; + UINT8 DefaultLength; + UINT8 Type; + +} ACPI_FADT_INFO; + +#define ACPI_FADT_REQUIRED 1 +#define ACPI_FADT_SEPARATE_LENGTH 2 + +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 */ + 0}, + + {"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, + 0}, + + {"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_REQUIRED}, + + {"Gpe0Block", + ACPI_FADT_OFFSET (XGpe0Block), + ACPI_FADT_OFFSET (Gpe0Block), + ACPI_FADT_OFFSET (Gpe0BlockLength), + 0, + ACPI_FADT_SEPARATE_LENGTH}, + + {"Gpe1Block", + ACPI_FADT_OFFSET (XGpe1Block), + ACPI_FADT_OFFSET (Gpe1Block), + ACPI_FADT_OFFSET (Gpe1BlockLength), + 0, + ACPI_FADT_SEPARATE_LENGTH} +}; + +#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; + UINT8 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, in bytes + * Address - Address of the register + * + * RETURN: None + * + * DESCRIPTION: Initialize a Generic Address Structure (GAS) + * See the ACPI specification for a full description and + * definition of this structure. + * + ******************************************************************************/ + +static inline void +AcpiTbInitGenericAddress ( + ACPI_GENERIC_ADDRESS *GenericAddress, + UINT8 SpaceId, + UINT8 ByteWidth, + UINT64 Address) +{ + + /* + * 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 = (UINT8) ACPI_MUL_8 (ByteWidth); + GenericAddress->BitOffset = 0; + GenericAddress->AccessWidth = 0; /* Access width ANY */ +} + + +/******************************************************************************* + * + * FUNCTION: AcpiTbParseFadt + * + * PARAMETERS: TableIndex - Index for the FADT + * + * RETURN: None + * + * DESCRIPTION: Initialize the FADT, DSDT and FACS tables + * (FADT contains the addresses of the DSDT and FACS) + * + ******************************************************************************/ + +void +AcpiTbParseFadt ( + UINT32 TableIndex) +{ + UINT32 Length; + ACPI_TABLE_HEADER *Table; + + + /* + * 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. + */ + Length = AcpiGbl_RootTableList.Tables[TableIndex].Length; + + Table = AcpiOsMapMemory ( + AcpiGbl_RootTableList.Tables[TableIndex].Address, Length); + if (!Table) + { + return; + } + + /* + * 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 */ + + AcpiOsUnmapMemory (Table, Length); + + /* Obtain the DSDT and FACS tables via their addresses within the FADT */ + + AcpiTbInstallTable ((ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XDsdt, + ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT); + + AcpiTbInstallTable ((ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XFacs, + ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS); +} + + +/******************************************************************************* + * + * 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 + * (the ACPI 2.0/3.0 version). If so, truncate the table, and issue + * a warning. + */ + if (Length > sizeof (ACPI_TABLE_FADT)) + { + ACPI_WARNING ((AE_INFO, + "FADT (revision %u) is longer than ACPI 2.0 version, " + "truncating length 0x%X to 0x%X", + Table->Revision, Length, (UINT32) sizeof (ACPI_TABLE_FADT))); + } + + /* Clear the entire local FADT */ + + ACPI_MEMSET (&AcpiGbl_FADT, 0, sizeof (ACPI_TABLE_FADT)); + + /* Copy the original FADT, up to sizeof (ACPI_TABLE_FADT) */ + + ACPI_MEMCPY (&AcpiGbl_FADT, Table, + ACPI_MIN (Length, sizeof (ACPI_TABLE_FADT))); + + /* Convert the local copy of the FADT to the common internal format */ + + AcpiTbConvertFadt (); + + /* Validate FADT values now, before we make any changes */ + + AcpiTbValidateFadt (); + + /* Initialize the global ACPI register structures */ + + AcpiTbSetupFadtRegisters (); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiTbConvertFadt + * + * PARAMETERS: None, uses AcpiGbl_FADT + * + * RETURN: None + * + * DESCRIPTION: Converts all versions of the FADT to a common internal format. + * Expand 32-bit addresses to 64-bit as necessary. + * + * NOTE: AcpiGbl_FADT must be of size (ACPI_TABLE_FADT), + * and must contain a copy of the actual 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 if the corresponding X field is zero. + * + * For ACPI 1.0 FADTs, all 32-bit address fields are expanded to the + * corresponding "X" fields in the internal FADT. + * + * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded + * to the corresponding 64-bit X fields. For compatibility with other ACPI + * implementations, we ignore the 64-bit field if the 32-bit field is valid, + * regardless of whether the host OS is 32-bit or 64-bit. + * + ******************************************************************************/ + +static void +AcpiTbConvertFadt ( + void) +{ + ACPI_GENERIC_ADDRESS *Address64; + UINT32 Address32; + UINT32 i; + + + /* Update the local FADT table header length */ + + AcpiGbl_FADT.Header.Length = sizeof (ACPI_TABLE_FADT); + + /* + * Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary. + * Later code will always use the X 64-bit field. + */ + if (!AcpiGbl_FADT.XFacs) + { + AcpiGbl_FADT.XFacs = (UINT64) AcpiGbl_FADT.Facs; + } + if (!AcpiGbl_FADT.XDsdt) + { + AcpiGbl_FADT.XDsdt = (UINT64) AcpiGbl_FADT.Dsdt; + } + + /* + * 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. + */ + if (AcpiGbl_FADT.Header.Revision < 3) + { + AcpiGbl_FADT.PreferredProfile = 0; + AcpiGbl_FADT.PstateControl = 0; + AcpiGbl_FADT.CstControl = 0; + AcpiGbl_FADT.BootFlags = 0; + } + + /* + * 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. + * + * March 2009: + * We now always use the 32-bit address if it is valid (non-null). This + * is not in accordance with the ACPI specification which states that + * the 64-bit address supersedes the 32-bit version, but we do this for + * compatibility with other ACPI implementations. Most notably, in the + * case where both the 32 and 64 versions are non-null, we use the 32-bit + * version. This is the only address that is guaranteed to have been + * tested by the BIOS manufacturer. + */ + for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) + { + Address32 = *ACPI_ADD_PTR (UINT32, + &AcpiGbl_FADT, FadtInfoTable[i].Address32); + + Address64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS, + &AcpiGbl_FADT, FadtInfoTable[i].Address64); + + /* + * If both 32- and 64-bit addresses are valid (non-zero), + * they must match. + */ + if (Address64->Address && Address32 && + (Address64->Address != (UINT64) Address32)) + { + ACPI_ERROR ((AE_INFO, + "32/64X address mismatch in %s: %8.8X/%8.8X%8.8X, using 32", + FadtInfoTable[i].Name, Address32, + ACPI_FORMAT_UINT64 (Address64->Address))); + } + + /* Always use 32-bit address if it is valid (non-null) */ + + if (Address32) + { + /* + * Copy the 32-bit address to the 64-bit GAS structure. The + * Space ID is always I/O for 32-bit legacy address fields + */ + AcpiTbInitGenericAddress (Address64, ACPI_ADR_SPACE_SYSTEM_IO, + *ACPI_ADD_PTR (UINT8, &AcpiGbl_FADT, FadtInfoTable[i].Length), + (UINT64) Address32); + } + } +} + + +/******************************************************************************* + * + * FUNCTION: AcpiTbValidateFadt + * + * PARAMETERS: Table - Pointer to the FADT to be validated + * + * RETURN: None + * + * DESCRIPTION: Validate various important fields within the FADT. If a problem + * is found, issue a message, but no status is returned. + * Used by both the table manager and the disassembler. + * + * 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 +AcpiTbValidateFadt ( + void) +{ + char *Name; + ACPI_GENERIC_ADDRESS *Address64; + UINT8 Length; + UINT32 i; + + + /* + * 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) would indicate the presence of two FACS or two DSDT tables. + */ + if (AcpiGbl_FADT.Facs && + (AcpiGbl_FADT.XFacs != (UINT64) AcpiGbl_FADT.Facs)) + { + ACPI_WARNING ((AE_INFO, + "32/64X FACS address mismatch in FADT - " + "%8.8X/%8.8X%8.8X, using 32", + AcpiGbl_FADT.Facs, ACPI_FORMAT_UINT64 (AcpiGbl_FADT.XFacs))); + + AcpiGbl_FADT.XFacs = (UINT64) AcpiGbl_FADT.Facs; + } + + if (AcpiGbl_FADT.Dsdt && + (AcpiGbl_FADT.XDsdt != (UINT64) AcpiGbl_FADT.Dsdt)) + { + ACPI_WARNING ((AE_INFO, + "32/64X DSDT address mismatch in FADT - " + "%8.8X/%8.8X%8.8X, using 32", + AcpiGbl_FADT.Dsdt, ACPI_FORMAT_UINT64 (AcpiGbl_FADT.XDsdt))); + + AcpiGbl_FADT.XDsdt = (UINT64) AcpiGbl_FADT.Dsdt; + } + + /* Examine all of the 64-bit extended address fields (X fields) */ + + for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) + { + /* + * Generate pointer to the 64-bit address, get the register + * length (width) and the register name + */ + 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; + + /* + * For each extended field, check for length mismatch between the + * legacy length field and the corresponding 64-bit X length field. + */ + if (Address64->Address && + (Address64->BitWidth != ACPI_MUL_8 (Length))) + { + ACPI_WARNING ((AE_INFO, + "32/64X length mismatch in %s: %d/%d", + Name, ACPI_MUL_8 (Length), Address64->BitWidth)); + } + + if (FadtInfoTable[i].Type & ACPI_FADT_REQUIRED) + { + /* + * Field is required (PM1aEvent, PM1aControl, PmTimer). + * Both the address and length must be non-zero. + */ + if (!Address64->Address || !Length) + { + ACPI_ERROR ((AE_INFO, + "Required field %s has zero address and/or length:" + " %8.8X%8.8X/%X", + Name, ACPI_FORMAT_UINT64 (Address64->Address), Length)); + } + } + else if (FadtInfoTable[i].Type & 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_WARNING ((AE_INFO, + "Optional field %s has zero address or length: " + "%8.8X%8.8X/%X", + Name, 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_WARNING ((AE_INFO, + "Invalid length for %s: %d, using default %d", + 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)); + } + } +} + |