NetBSD-5.0.2/sys/dist/acpica/tbutils.c
/******************************************************************************
*
* Module Name: tbutils - table utilities
* $Revision: 1.6 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2008, 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 __TBUTILS_C__
#include "acpi.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbutils")
/* Local prototypes */
static ACPI_PHYSICAL_ADDRESS
AcpiTbGetRootTableEntry (
UINT8 *TableEntry,
ACPI_NATIVE_UINT TableEntrySize);
/*******************************************************************************
*
* FUNCTION: AcpiTbTablesLoaded
*
* PARAMETERS: None
*
* RETURN: TRUE if required ACPI tables are loaded
*
* DESCRIPTION: Determine if the minimum required ACPI tables are present
* (FADT, FACS, DSDT)
*
******************************************************************************/
BOOLEAN
AcpiTbTablesLoaded (
void)
{
if (AcpiGbl_RootTableList.Count >= 3)
{
return (TRUE);
}
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbPrintTableHeader
*
* PARAMETERS: Address - Table physical address
* Header - Table header
*
* RETURN: None
*
* DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP.
*
******************************************************************************/
void
AcpiTbPrintTableHeader (
ACPI_PHYSICAL_ADDRESS Address,
ACPI_TABLE_HEADER *Header)
{
if (!ACPI_STRNCMP (Header->Signature, ACPI_SIG_FACS, 4))
{
/* FACS only has signature and length fields of common table header */
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%4.4s @ 0x%p/0x%04X",
Header->Signature, ACPI_CAST_PTR (UINT64, Address), Header->Length));
}
else if (!ACPI_STRNCMP (Header->Signature, ACPI_SIG_RSDP, 4))
{
/* RSDP has no common fields */
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "RSDP @ 0x%p/0x%04X (v%3.3d %6.6s)",
ACPI_CAST_PTR (void, Address),
(ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision > 0) ?
ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Length : 20,
ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision,
ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->OemId));
}
else
{
/* Standard ACPI table with full common header */
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"%4.4s @ 0x%p/0x%04X (v%3.3d %6.6s %8.8s 0x%08X %4.4s 0x%08X)",
Header->Signature, ACPI_CAST_PTR (void, Address),
Header->Length, Header->Revision, Header->OemId,
Header->OemTableId, Header->OemRevision, Header->AslCompilerId,
Header->AslCompilerRevision));
}
}
/*******************************************************************************
*
* FUNCTION: AcpiTbValidateChecksum
*
* PARAMETERS: Table - ACPI table to verify
* Length - Length of entire table
*
* RETURN: Status
*
* DESCRIPTION: Verifies that the table checksums to zero. Optionally returns
* exception on bad checksum.
*
******************************************************************************/
ACPI_STATUS
AcpiTbVerifyChecksum (
ACPI_TABLE_HEADER *Table,
UINT32 Length)
{
UINT8 Checksum;
/* Compute the checksum on the table */
Checksum = AcpiTbChecksum (ACPI_CAST_PTR (UINT8, Table), Length);
/* Checksum ok? (should be zero) */
if (Checksum)
{
ACPI_WARNING ((AE_INFO,
"Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X",
Table->Signature, Table->Checksum, (UINT8) (Table->Checksum - Checksum)));
#if (ACPI_CHECKSUM_ABORT)
return (AE_BAD_CHECKSUM);
#endif
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbChecksum
*
* PARAMETERS: Buffer - Pointer to memory region to be checked
* Length - Length of this memory region
*
* RETURN: Checksum (UINT8)
*
* DESCRIPTION: Calculates circular checksum of memory region.
*
******************************************************************************/
UINT8
AcpiTbChecksum (
UINT8 *Buffer,
ACPI_NATIVE_UINT Length)
{
UINT8 Sum = 0;
UINT8 *End = Buffer + Length;
while (Buffer < End)
{
Sum = (UINT8) (Sum + *(Buffer++));
}
return Sum;
}
/*******************************************************************************
*
* FUNCTION: AcpiTbInstallTable
*
* PARAMETERS: Address - Physical address of DSDT or FACS
* Flags - Flags
* Signature - Table signature, NULL if no need to
* match
* TableIndex - Index into root table array
*
* RETURN: None
*
* DESCRIPTION: Install an ACPI table into the global data structure.
*
******************************************************************************/
void
AcpiTbInstallTable (
ACPI_PHYSICAL_ADDRESS Address,
UINT8 Flags,
const char *Signature,
ACPI_NATIVE_UINT TableIndex)
{
ACPI_TABLE_HEADER *Table;
if (!Address)
{
ACPI_ERROR ((AE_INFO, "Null physical address for ACPI table [%s]",
Signature));
return;
}
/* Map just the table header */
Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER));
if (!Table)
{
return;
}
/* If a particular signature is expected, signature must match */
if (Signature && ACPI_STRNCMP (Table->Signature, Signature, 4))
{
ACPI_ERROR ((AE_INFO, "Invalid signature 0x%X for ACPI table [%s]",
*ACPI_CAST_PTR (UINT32, Table->Signature), Signature));
goto UnmapAndExit;
}
/* Initialize the table entry */
AcpiGbl_RootTableList.Tables[TableIndex].Address = Address;
AcpiGbl_RootTableList.Tables[TableIndex].Length = Table->Length;
AcpiGbl_RootTableList.Tables[TableIndex].Flags = Flags;
ACPI_MOVE_32_TO_32 (
&(AcpiGbl_RootTableList.Tables[TableIndex].Signature),
Table->Signature);
AcpiTbPrintTableHeader (Address, Table);
if (TableIndex == ACPI_TABLE_INDEX_DSDT)
{
/* Global integer width is based upon revision of the DSDT */
AcpiUtSetIntegerWidth (Table->Revision);
}
UnmapAndExit:
AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER));
}
/*******************************************************************************
*
* 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,
ACPI_NATIVE_UINT 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 == sizeof (UINT32))
{
/*
* 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_WARNING ((AE_INFO,
"64-bit Physical Address in XSDT is too large (%8.8X%8.8X), truncating",
ACPI_FORMAT_UINT64 (Address64)));
}
#endif
return ((ACPI_PHYSICAL_ADDRESS) (Address64));
}
}
/*******************************************************************************
*
* FUNCTION: AcpiTbParseRootTable
*
* PARAMETERS: Rsdp - Pointer to the RSDP
* Flags - Flags
*
* 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,
UINT8 Flags)
{
ACPI_TABLE_RSDP *Rsdp;
ACPI_NATIVE_UINT TableEntrySize;
ACPI_NATIVE_UINT i;
UINT32 TableCount;
ACPI_TABLE_HEADER *Table;
ACPI_PHYSICAL_ADDRESS Address;
UINT32 Length;
UINT8 *TableEntry;
ACPI_STATUS Status;
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));
/* Differentiate between RSDT and XSDT root tables */
if (Rsdp->Revision > 1 && Rsdp->XsdtPhysicalAddress)
{
/*
* Root table is 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 = sizeof (UINT64);
}
else
{
/* Root table is an RSDT (32-bit physical addresses) */
Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->RsdtPhysicalAddress;
TableEntrySize = sizeof (UINT32);
}
/*
* 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);
/* Get the length of the full table, verify length and map entire table */
Length = Table->Length;
AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER));
if (Length < sizeof (ACPI_TABLE_HEADER))
{
ACPI_ERROR ((AE_INFO, "Invalid 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);
}
/* Calculate the number of tables described in the root table */
TableCount = (UINT32) ((Table->Length - sizeof (ACPI_TABLE_HEADER)) / TableEntrySize);
/*
* First two entries in the table array are reserved for the DSDT and FACS,
* which are not actually present in the RSDT/XSDT - they come from the FADT
*/
TableEntry = ACPI_CAST_PTR (UINT8, Table) + sizeof (ACPI_TABLE_HEADER);
AcpiGbl_RootTableList.Count = 2;
/*
* Initialize the root table array from the RSDT/XSDT
*/
for (i = 0; i < TableCount; i++)
{
if (AcpiGbl_RootTableList.Count >= AcpiGbl_RootTableList.Size)
{
/* There is no more room in the root table array, attempt resize */
Status = AcpiTbResizeRootTableList ();
if (ACPI_FAILURE (Status))
{
ACPI_WARNING ((AE_INFO, "Truncating %u table entries!",
(unsigned) (AcpiGbl_RootTableList.Size - AcpiGbl_RootTableList.Count)));
break;
}
}
/* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */
AcpiGbl_RootTableList.Tables[AcpiGbl_RootTableList.Count].Address =
AcpiTbGetRootTableEntry (TableEntry, TableEntrySize);
TableEntry += TableEntrySize;
AcpiGbl_RootTableList.Count++;
}
/*
* It is not possible to map more than one entry in some environments,
* so unmap the root table here before mapping other tables
*/
AcpiOsUnmapMemory (Table, Length);
/*
* Complete the initialization of the root table array by examining
* the header of each table
*/
for (i = 2; i < AcpiGbl_RootTableList.Count; i++)
{
AcpiTbInstallTable (AcpiGbl_RootTableList.Tables[i].Address,
Flags, NULL, i);
/* Special case for FADT - get the DSDT and FACS */
if (!ACPI_STRNCMP(
(const char *)&AcpiGbl_RootTableList.Tables[i].Signature,
ACPI_SIG_FADT, 4))
{
AcpiTbParseFadt (i, Flags);
}
}
return_ACPI_STATUS (AE_OK);
}