freebsd-nq/sys/contrib/dev/acpica/exmisc.c
2001-10-31 02:32:29 +00:00

560 lines
17 KiB
C

/******************************************************************************
*
* Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes
* $Revision: 92 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 __EXMISC_C__
#include "acpi.h"
#include "acparser.h"
#include "acinterp.h"
#include "amlcode.h"
#include "acdispat.h"
#define _COMPONENT ACPI_EXECUTER
MODULE_NAME ("exmisc")
/*******************************************************************************
*
* FUNCTION: AcpiExGetObjectReference
*
* PARAMETERS: ObjDesc - Create a reference to this object
* ReturnDesc - Where to store the reference
*
* RETURN: Status
*
* DESCRIPTION: Obtain and return a "reference" to the target object
* Common code for the RefOfOp and the CondRefOfOp.
*
******************************************************************************/
ACPI_STATUS
AcpiExGetObjectReference (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_OPERAND_OBJECT **ReturnDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
FUNCTION_TRACE_PTR ("ExGetObjectReference", ObjDesc);
if (VALID_DESCRIPTOR_TYPE (ObjDesc, ACPI_DESC_TYPE_INTERNAL))
{
if (ObjDesc->Common.Type != INTERNAL_TYPE_REFERENCE)
{
*ReturnDesc = NULL;
Status = AE_TYPE;
goto Cleanup;
}
/*
* Not a Name -- an indirect name pointer would have
* been converted to a direct name pointer in AcpiExResolveOperands
*/
switch (ObjDesc->Reference.Opcode)
{
case AML_LOCAL_OP:
case AML_ARG_OP:
*ReturnDesc = (void *) AcpiDsMethodDataGetNode (ObjDesc->Reference.Opcode,
ObjDesc->Reference.Offset, WalkState);
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "(Internal) Unknown Ref subtype %02x\n",
ObjDesc->Reference.Opcode));
*ReturnDesc = NULL;
Status = AE_AML_INTERNAL;
goto Cleanup;
}
}
else if (VALID_DESCRIPTOR_TYPE (ObjDesc, ACPI_DESC_TYPE_NAMED))
{
/* Must be a named object; Just return the Node */
*ReturnDesc = ObjDesc;
}
else
{
*ReturnDesc = NULL;
Status = AE_TYPE;
}
Cleanup:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p Ref=%p\n", ObjDesc, *ReturnDesc));
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExDoConcatenate
*
* PARAMETERS: *ObjDesc - Object to be converted. Must be an
* Integer, Buffer, or String
* WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Concatenate two objects OF THE SAME TYPE.
*
******************************************************************************/
ACPI_STATUS
AcpiExDoConcatenate (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_OPERAND_OBJECT *ObjDesc2,
ACPI_OPERAND_OBJECT **ActualReturnDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
UINT32 i;
ACPI_INTEGER ThisInteger;
ACPI_OPERAND_OBJECT *ReturnDesc;
NATIVE_CHAR *NewBuf;
UINT32 IntegerSize = sizeof (ACPI_INTEGER);
FUNCTION_ENTRY ();
/*
* There are three cases to handle:
* 1) Two Integers concatenated to produce a buffer
* 2) Two Strings concatenated to produce a string
* 3) Two Buffers concatenated to produce a buffer
*/
switch (ObjDesc->Common.Type)
{
case ACPI_TYPE_INTEGER:
/* Handle both ACPI 1.0 and ACPI 2.0 Integer widths */
if (WalkState->MethodNode->Flags & ANOBJ_DATA_WIDTH_32)
{
/*
* We are running a method that exists in a 32-bit ACPI table.
* Truncate the value to 32 bits by zeroing out the upper
* 32-bit field
*/
IntegerSize = sizeof (UINT32);
}
/* Result of two integers is a buffer */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
if (!ReturnDesc)
{
return (AE_NO_MEMORY);
}
/* Need enough space for two integers */
ReturnDesc->Buffer.Length = IntegerSize * 2;
NewBuf = ACPI_MEM_CALLOCATE (ReturnDesc->Buffer.Length);
if (!NewBuf)
{
REPORT_ERROR
(("ExDoConcatenate: Buffer allocation failure\n"));
Status = AE_NO_MEMORY;
goto Cleanup;
}
ReturnDesc->Buffer.Pointer = (UINT8 *) NewBuf;
/* Convert the first integer */
ThisInteger = ObjDesc->Integer.Value;
for (i = 0; i < IntegerSize; i++)
{
NewBuf[i] = (UINT8) ThisInteger;
ThisInteger >>= 8;
}
/* Convert the second integer */
ThisInteger = ObjDesc2->Integer.Value;
for (; i < (IntegerSize * 2); i++)
{
NewBuf[i] = (UINT8) ThisInteger;
ThisInteger >>= 8;
}
break;
case ACPI_TYPE_STRING:
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
if (!ReturnDesc)
{
return (AE_NO_MEMORY);
}
/* Operand0 is string */
NewBuf = ACPI_MEM_ALLOCATE (ObjDesc->String.Length +
ObjDesc2->String.Length + 1);
if (!NewBuf)
{
REPORT_ERROR
(("ExDoConcatenate: String allocation failure\n"));
Status = AE_NO_MEMORY;
goto Cleanup;
}
STRCPY (NewBuf, ObjDesc->String.Pointer);
STRCPY (NewBuf + ObjDesc->String.Length,
ObjDesc2->String.Pointer);
/* Point the return object to the new string */
ReturnDesc->String.Pointer = NewBuf;
ReturnDesc->String.Length = ObjDesc->String.Length +=
ObjDesc2->String.Length;
break;
case ACPI_TYPE_BUFFER:
/* Operand0 is a buffer */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
if (!ReturnDesc)
{
return (AE_NO_MEMORY);
}
NewBuf = ACPI_MEM_ALLOCATE (ObjDesc->Buffer.Length +
ObjDesc2->Buffer.Length);
if (!NewBuf)
{
REPORT_ERROR
(("ExDoConcatenate: Buffer allocation failure\n"));
Status = AE_NO_MEMORY;
goto Cleanup;
}
MEMCPY (NewBuf, ObjDesc->Buffer.Pointer,
ObjDesc->Buffer.Length);
MEMCPY (NewBuf + ObjDesc->Buffer.Length, ObjDesc2->Buffer.Pointer,
ObjDesc2->Buffer.Length);
/*
* Point the return object to the new buffer
*/
ReturnDesc->Buffer.Pointer = (UINT8 *) NewBuf;
ReturnDesc->Buffer.Length = ObjDesc->Buffer.Length +
ObjDesc2->Buffer.Length;
break;
default:
Status = AE_AML_INTERNAL;
ReturnDesc = NULL;
}
*ActualReturnDesc = ReturnDesc;
return (AE_OK);
Cleanup:
AcpiUtRemoveReference (ReturnDesc);
return (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExDoMathOp
*
* PARAMETERS: Opcode - AML opcode
* Operand0 - Integer operand #0
* Operand0 - Integer operand #1
*
* RETURN: Integer result of the operation
*
* DESCRIPTION: Execute a math AML opcode. The purpose of having all of the
* math functions here is to prevent a lot of pointer dereferencing
* to obtain the operands.
*
******************************************************************************/
ACPI_INTEGER
AcpiExDoMathOp (
UINT16 Opcode,
ACPI_INTEGER Operand0,
ACPI_INTEGER Operand1)
{
switch (Opcode)
{
case AML_ADD_OP: /* Add (Operand0, Operand1, Result) */
return (Operand0 + Operand1);
case AML_BIT_AND_OP: /* And (Operand0, Operand1, Result) */
return (Operand0 & Operand1);
case AML_BIT_NAND_OP: /* NAnd (Operand0, Operand1, Result) */
return (~(Operand0 & Operand1));
case AML_BIT_OR_OP: /* Or (Operand0, Operand1, Result) */
return (Operand0 | Operand1);
case AML_BIT_NOR_OP: /* NOr (Operand0, Operand1, Result) */
return (~(Operand0 | Operand1));
case AML_BIT_XOR_OP: /* XOr (Operand0, Operand1, Result) */
return (Operand0 ^ Operand1);
case AML_MULTIPLY_OP: /* Multiply (Operand0, Operand1, Result) */
return (Operand0 * Operand1);
case AML_SHIFT_LEFT_OP: /* ShiftLeft (Operand, ShiftCount, Result) */
return (Operand0 << Operand1);
case AML_SHIFT_RIGHT_OP: /* ShiftRight (Operand, ShiftCount, Result) */
return (Operand0 >> Operand1);
case AML_SUBTRACT_OP: /* Subtract (Operand0, Operand1, Result) */
return (Operand0 - Operand1);
default:
return (0);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiExDoLogicalOp
*
* PARAMETERS: Opcode - AML opcode
* Operand0 - Integer operand #0
* Operand0 - Integer operand #1
*
* RETURN: TRUE/FALSE result of the operation
*
* DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the
* functions here is to prevent a lot of pointer dereferencing
* to obtain the operands and to simplify the generation of the
* logical value.
*
* Note: cleanest machine code seems to be produced by the code
* below, rather than using statements of the form:
* Result = (Operand0 == Operand1);
*
******************************************************************************/
BOOLEAN
AcpiExDoLogicalOp (
UINT16 Opcode,
ACPI_INTEGER Operand0,
ACPI_INTEGER Operand1)
{
switch (Opcode)
{
case AML_LAND_OP: /* LAnd (Operand0, Operand1) */
if (Operand0 && Operand1)
{
return (TRUE);
}
break;
case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
if (Operand0 == Operand1)
{
return (TRUE);
}
break;
case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
if (Operand0 > Operand1)
{
return (TRUE);
}
break;
case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
if (Operand0 < Operand1)
{
return (TRUE);
}
break;
case AML_LOR_OP: /* LOr (Operand0, Operand1) */
if (Operand0 || Operand1)
{
return (TRUE);
}
break;
}
return (FALSE);
}