diff options
Diffstat (limited to 'usr/src/common/acpica/tables/tbutils.c')
| -rw-r--r-- | usr/src/common/acpica/tables/tbutils.c | 413 |
1 files changed, 413 insertions, 0 deletions
diff --git a/usr/src/common/acpica/tables/tbutils.c b/usr/src/common/acpica/tables/tbutils.c new file mode 100644 index 0000000000..5fc07b76e0 --- /dev/null +++ b/usr/src/common/acpica/tables/tbutils.c @@ -0,0 +1,413 @@ +/****************************************************************************** + * + * Module Name: tbutils - ACPI Table utilities + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2016, 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. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * 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 ("tbutils") + + +/* Local prototypes */ + +static ACPI_PHYSICAL_ADDRESS +AcpiTbGetRootTableEntry ( + UINT8 *TableEntry, + UINT32 TableEntrySize); + + +#if (!ACPI_REDUCED_HARDWARE) +/******************************************************************************* + * + * FUNCTION: AcpiTbInitializeFacs + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Create a permanent mapping for the FADT and save it in a global + * for accessing the Global Lock and Firmware Waking Vector + * + ******************************************************************************/ + +ACPI_STATUS +AcpiTbInitializeFacs ( + void) +{ + ACPI_TABLE_FACS *Facs; + + + /* If Hardware Reduced flag is set, there is no FACS */ + + if (AcpiGbl_ReducedHardware) + { + AcpiGbl_FACS = NULL; + return (AE_OK); + } + else if (AcpiGbl_FADT.XFacs && + (!AcpiGbl_FADT.Facs || !AcpiGbl_Use32BitFacsAddresses)) + { + (void) AcpiGetTableByIndex (AcpiGbl_XFacsIndex, + ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &Facs)); + AcpiGbl_FACS = Facs; + } + else if (AcpiGbl_FADT.Facs) + { + (void) AcpiGetTableByIndex (AcpiGbl_FacsIndex, + ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &Facs)); + AcpiGbl_FACS = Facs; + } + + /* If there is no FACS, just continue. There was already an error msg */ + + return (AE_OK); +} +#endif /* !ACPI_REDUCED_HARDWARE */ + + +/******************************************************************************* + * + * FUNCTION: AcpiTbCheckDsdtHeader + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Quick compare to check validity of the DSDT. This will detect + * if the DSDT has been replaced from outside the OS and/or if + * the DSDT header has been corrupted. + * + ******************************************************************************/ + +void +AcpiTbCheckDsdtHeader ( + void) +{ + + /* Compare original length and checksum to current values */ + + if (AcpiGbl_OriginalDsdtHeader.Length != AcpiGbl_DSDT->Length || + AcpiGbl_OriginalDsdtHeader.Checksum != AcpiGbl_DSDT->Checksum) + { + ACPI_BIOS_ERROR ((AE_INFO, + "The DSDT has been corrupted or replaced - " + "old, new headers below")); + + AcpiTbPrintTableHeader (0, &AcpiGbl_OriginalDsdtHeader); + AcpiTbPrintTableHeader (0, AcpiGbl_DSDT); + + /* Disable further error messages */ + + AcpiGbl_OriginalDsdtHeader.Length = AcpiGbl_DSDT->Length; + AcpiGbl_OriginalDsdtHeader.Checksum = AcpiGbl_DSDT->Checksum; + } +} + + +/******************************************************************************* + * + * FUNCTION: AcpiTbCopyDsdt + * + * PARAMETERS: TableDesc - Installed table to copy + * + * RETURN: None + * + * DESCRIPTION: Implements a subsystem option to copy the DSDT to local memory. + * Some very bad BIOSs are known to either corrupt the DSDT or + * install a new, bad DSDT. This copy works around the problem. + * + ******************************************************************************/ + +ACPI_TABLE_HEADER * +AcpiTbCopyDsdt ( + UINT32 TableIndex) +{ + ACPI_TABLE_HEADER *NewTable; + ACPI_TABLE_DESC *TableDesc; + + + TableDesc = &AcpiGbl_RootTableList.Tables[TableIndex]; + + NewTable = ACPI_ALLOCATE (TableDesc->Length); + if (!NewTable) + { + ACPI_ERROR ((AE_INFO, "Could not copy DSDT of length 0x%X", + TableDesc->Length)); + return (NULL); + } + + memcpy (NewTable, TableDesc->Pointer, TableDesc->Length); + AcpiTbUninstallTable (TableDesc); + + AcpiTbInitTableDescriptor ( + &AcpiGbl_RootTableList.Tables[AcpiGbl_DsdtIndex], + ACPI_PTR_TO_PHYSADDR (NewTable), + ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL, NewTable); + + ACPI_INFO (( + "Forced DSDT copy: length 0x%05X copied locally, original unmapped", + NewTable->Length)); + + return (NewTable); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiTbGetRootTableEntry + * + * PARAMETERS: TableEntry - Pointer to the RSDT/XSDT table entry + * TableEntrySize - sizeof 32 or 64 (RSDT or XSDT) + * + * RETURN: Physical address extracted from the root table + * + * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on + * both 32-bit and 64-bit platforms + * + * NOTE: ACPI_PHYSICAL_ADDRESS is 32-bit on 32-bit platforms, 64-bit on + * 64-bit platforms. + * + ******************************************************************************/ + +static ACPI_PHYSICAL_ADDRESS +AcpiTbGetRootTableEntry ( + UINT8 *TableEntry, + UINT32 TableEntrySize) +{ + UINT64 Address64; + + + /* + * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): + * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT + */ + if (TableEntrySize == ACPI_RSDT_ENTRY_SIZE) + { + /* + * 32-bit platform, RSDT: Return 32-bit table entry + * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return + */ + return ((ACPI_PHYSICAL_ADDRESS) (*ACPI_CAST_PTR ( + UINT32, TableEntry))); + } + else + { + /* + * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return + * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, + * return 64-bit + */ + ACPI_MOVE_64_TO_64 (&Address64, TableEntry); + +#if ACPI_MACHINE_WIDTH == 32 + if (Address64 > ACPI_UINT32_MAX) + { + /* Will truncate 64-bit address to 32 bits, issue warning */ + + ACPI_BIOS_WARNING ((AE_INFO, + "64-bit Physical Address in XSDT is too large (0x%8.8X%8.8X)," + " truncating", + ACPI_FORMAT_UINT64 (Address64))); + } +#endif + return ((ACPI_PHYSICAL_ADDRESS) (Address64)); + } +} + + +/******************************************************************************* + * + * FUNCTION: AcpiTbParseRootTable + * + * PARAMETERS: Rsdp - Pointer to the RSDP + * + * RETURN: Status + * + * DESCRIPTION: This function is called to parse the Root System Description + * Table (RSDT or XSDT) + * + * NOTE: Tables are mapped (not copied) for efficiency. The FACS must + * be mapped and cannot be copied because it contains the actual + * memory location of the ACPI Global Lock. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiTbParseRootTable ( + ACPI_PHYSICAL_ADDRESS RsdpAddress) +{ + ACPI_TABLE_RSDP *Rsdp; + UINT32 TableEntrySize; + UINT32 i; + UINT32 TableCount; + ACPI_TABLE_HEADER *Table; + ACPI_PHYSICAL_ADDRESS Address; + UINT32 Length; + UINT8 *TableEntry; + ACPI_STATUS Status; + UINT32 TableIndex; + + + ACPI_FUNCTION_TRACE (TbParseRootTable); + + + /* Map the entire RSDP and extract the address of the RSDT or XSDT */ + + Rsdp = AcpiOsMapMemory (RsdpAddress, sizeof (ACPI_TABLE_RSDP)); + if (!Rsdp) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + AcpiTbPrintTableHeader (RsdpAddress, + ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp)); + + /* Use XSDT if present and not overridden. Otherwise, use RSDT */ + + if ((Rsdp->Revision > 1) && + Rsdp->XsdtPhysicalAddress && + !AcpiGbl_DoNotUseXsdt) + { + /* + * RSDP contains an XSDT (64-bit physical addresses). We must use + * the XSDT if the revision is > 1 and the XSDT pointer is present, + * as per the ACPI specification. + */ + Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->XsdtPhysicalAddress; + TableEntrySize = ACPI_XSDT_ENTRY_SIZE; + } + else + { + /* Root table is an RSDT (32-bit physical addresses) */ + + Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->RsdtPhysicalAddress; + TableEntrySize = ACPI_RSDT_ENTRY_SIZE; + } + + /* + * It is not possible to map more than one entry in some environments, + * so unmap the RSDP here before mapping other tables + */ + AcpiOsUnmapMemory (Rsdp, sizeof (ACPI_TABLE_RSDP)); + + /* Map the RSDT/XSDT table header to get the full table length */ + + Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER)); + if (!Table) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + AcpiTbPrintTableHeader (Address, Table); + + /* + * Validate length of the table, and map entire table. + * Minimum length table must contain at least one entry. + */ + Length = Table->Length; + AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER)); + + if (Length < (sizeof (ACPI_TABLE_HEADER) + TableEntrySize)) + { + ACPI_BIOS_ERROR ((AE_INFO, + "Invalid table length 0x%X in RSDT/XSDT", Length)); + return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH); + } + + Table = AcpiOsMapMemory (Address, Length); + if (!Table) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Validate the root table checksum */ + + Status = AcpiTbVerifyChecksum (Table, Length); + if (ACPI_FAILURE (Status)) + { + AcpiOsUnmapMemory (Table, Length); + return_ACPI_STATUS (Status); + } + + /* Get the number of entries and pointer to first entry */ + + TableCount = (UINT32) ((Table->Length - sizeof (ACPI_TABLE_HEADER)) / + TableEntrySize); + TableEntry = ACPI_ADD_PTR (UINT8, Table, sizeof (ACPI_TABLE_HEADER)); + + /* Initialize the root table array from the RSDT/XSDT */ + + for (i = 0; i < TableCount; i++) + { + /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ + + Address = AcpiTbGetRootTableEntry (TableEntry, TableEntrySize); + + /* Skip NULL entries in RSDT/XSDT */ + + if (!Address) + { + goto NextTable; + } + + Status = AcpiTbInstallStandardTable (Address, + ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE, &TableIndex); + + if (ACPI_SUCCESS (Status) && + ACPI_COMPARE_NAME ( + &AcpiGbl_RootTableList.Tables[TableIndex].Signature, + ACPI_SIG_FADT)) + { + AcpiGbl_FadtIndex = TableIndex; + AcpiTbParseFadt (); + } + +NextTable: + + TableEntry += TableEntrySize; + } + + AcpiOsUnmapMemory (Table, Length); + return_ACPI_STATUS (AE_OK); +} |