| /****************************************************************************** |
| * |
| * Module Name: tbfadt - FADT table utilities |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2020, Intel Corp. |
| * All rights reserved. |
| * |
| * 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. |
| * |
| * NO WARRANTY |
| * 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 MERCHANTIBILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES. |
| */ |
| |
| #include "acpi.h" |
| #include "accommon.h" |
| #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); |
| } |
| } |
| } |
