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minix/drivers/acpi/executer/exoparg2.c
Tomas Hruby 9560b6dea8 ACPI driver 
- 99% of the code is Intel's ACPICA. The license is compliant with BSD
  and GNU and virtually all systems that use ACPI use this code, For
  instance it is part of the Linux kernel.

- The only minix specific files are

  acpi.c
  osminixxf.c
  platform/acminix.h

  and

  include/minix/acpi.h

- At the moment the driver does not register interrupt hooks which I
  believe is mainly for handling PnP, events like "battery level is
  low" and power management. Should not be difficult to add it if need
  be.

- The interface to the outside world is virtually non-existent except
  a trivial message based service for PCI driver to query which device
  is connected to what IRQ line. This will evolve as more components
  start using this driver. VM, Scheduler and IOMMU are the possible
  users right now.

- because of dependency on a native 64bit (long long, part of c99) it
  is compiled only with a gnu-like compilers which in case of Minix
  includes gcc llvm-gcc and clang
2010-09-02 15:44:04 +00:00

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/******************************************************************************
*
* Module Name: exoparg2 - AML execution - opcodes with 2 arguments
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, 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 __EXOPARG2_C__
#include "acpi.h"
#include "accommon.h"
#include "acparser.h"
#include "acinterp.h"
#include "acevents.h"
#include "amlcode.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exoparg2")
/*!
* Naming convention for AML interpreter execution routines.
*
* The routines that begin execution of AML opcodes are named with a common
* convention based upon the number of arguments, the number of target operands,
* and whether or not a value is returned:
*
* AcpiExOpcode_xA_yT_zR
*
* Where:
*
* xA - ARGUMENTS: The number of arguments (input operands) that are
* required for this opcode type (1 through 6 args).
* yT - TARGETS: The number of targets (output operands) that are required
* for this opcode type (0, 1, or 2 targets).
* zR - RETURN VALUE: Indicates whether this opcode type returns a value
* as the function return (0 or 1).
*
* The AcpiExOpcode* functions are called via the Dispatcher component with
* fully resolved operands.
!*/
/*******************************************************************************
*
* FUNCTION: AcpiExOpcode_2A_0T_0R
*
* PARAMETERS: WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Execute opcode with two arguments, no target, and no return
* value.
*
* ALLOCATION: Deletes both operands
*
******************************************************************************/
ACPI_STATUS
AcpiExOpcode_2A_0T_0R (
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_NAMESPACE_NODE *Node;
UINT32 Value;
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_0T_0R,
AcpiPsGetOpcodeName (WalkState->Opcode));
/* Examine the opcode */
switch (WalkState->Opcode)
{
case AML_NOTIFY_OP: /* Notify (NotifyObject, NotifyValue) */
/* The first operand is a namespace node */
Node = (ACPI_NAMESPACE_NODE *) Operand[0];
/* Second value is the notify value */
Value = (UINT32) Operand[1]->Integer.Value;
/* Are notifies allowed on this object? */
if (!AcpiEvIsNotifyObject (Node))
{
ACPI_ERROR ((AE_INFO,
"Unexpected notify object type [%s]",
AcpiUtGetTypeName (Node->Type)));
Status = AE_AML_OPERAND_TYPE;
break;
}
/*
* Dispatch the notify to the appropriate handler
* NOTE: the request is queued for execution after this method
* completes. The notify handlers are NOT invoked synchronously
* from this thread -- because handlers may in turn run other
* control methods.
*/
Status = AcpiEvQueueNotifyRequest (Node, Value);
break;
default:
ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
WalkState->Opcode));
Status = AE_AML_BAD_OPCODE;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExOpcode_2A_2T_1R
*
* PARAMETERS: WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets
* and one implicit return value.
*
******************************************************************************/
ACPI_STATUS
AcpiExOpcode_2A_2T_1R (
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_OPERAND_OBJECT *ReturnDesc1 = NULL;
ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_2T_1R,
AcpiPsGetOpcodeName (WalkState->Opcode));
/* Execute the opcode */
switch (WalkState->Opcode)
{
case AML_DIVIDE_OP:
/* Divide (Dividend, Divisor, RemainderResult QuotientResult) */
ReturnDesc1 = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc1)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
ReturnDesc2 = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc2)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Quotient to ReturnDesc1, remainder to ReturnDesc2 */
Status = AcpiUtDivide (Operand[0]->Integer.Value,
Operand[1]->Integer.Value,
&ReturnDesc1->Integer.Value,
&ReturnDesc2->Integer.Value);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
break;
default:
ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
WalkState->Opcode));
Status = AE_AML_BAD_OPCODE;
goto Cleanup;
}
/* Store the results to the target reference operands */
Status = AcpiExStore (ReturnDesc2, Operand[2], WalkState);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Status = AcpiExStore (ReturnDesc1, Operand[3], WalkState);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Cleanup:
/*
* Since the remainder is not returned indirectly, remove a reference to
* it. Only the quotient is returned indirectly.
*/
AcpiUtRemoveReference (ReturnDesc2);
if (ACPI_FAILURE (Status))
{
/* Delete the return object */
AcpiUtRemoveReference (ReturnDesc1);
}
/* Save return object (the remainder) on success */
else
{
WalkState->ResultObj = ReturnDesc1;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExOpcode_2A_1T_1R
*
* PARAMETERS: WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Execute opcode with two arguments, one target, and a return
* value.
*
******************************************************************************/
ACPI_STATUS
AcpiExOpcode_2A_1T_1R (
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
UINT64 Index;
ACPI_STATUS Status = AE_OK;
ACPI_SIZE Length;
ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_1T_1R,
AcpiPsGetOpcodeName (WalkState->Opcode));
/* Execute the opcode */
if (WalkState->OpInfo->Flags & AML_MATH)
{
/* All simple math opcodes (add, etc.) */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
ReturnDesc->Integer.Value = AcpiExDoMathOp (WalkState->Opcode,
Operand[0]->Integer.Value,
Operand[1]->Integer.Value);
goto StoreResultToTarget;
}
switch (WalkState->Opcode)
{
case AML_MOD_OP: /* Mod (Dividend, Divisor, RemainderResult (ACPI 2.0) */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* ReturnDesc will contain the remainder */
Status = AcpiUtDivide (Operand[0]->Integer.Value,
Operand[1]->Integer.Value,
NULL,
&ReturnDesc->Integer.Value);
break;
case AML_CONCAT_OP: /* Concatenate (Data1, Data2, Result) */
Status = AcpiExDoConcatenate (Operand[0], Operand[1],
&ReturnDesc, WalkState);
break;
case AML_TO_STRING_OP: /* ToString (Buffer, Length, Result) (ACPI 2.0) */
/*
* Input object is guaranteed to be a buffer at this point (it may have
* been converted.) Copy the raw buffer data to a new object of
* type String.
*/
/*
* Get the length of the new string. It is the smallest of:
* 1) Length of the input buffer
* 2) Max length as specified in the ToString operator
* 3) Length of input buffer up to a zero byte (null terminator)
*
* NOTE: A length of zero is ok, and will create a zero-length, null
* terminated string.
*/
Length = 0;
while ((Length < Operand[0]->Buffer.Length) &&
(Length < Operand[1]->Integer.Value) &&
(Operand[0]->Buffer.Pointer[Length]))
{
Length++;
}
/* Allocate a new string object */
ReturnDesc = AcpiUtCreateStringObject (Length);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/*
* Copy the raw buffer data with no transform.
* (NULL terminated already)
*/
ACPI_MEMCPY (ReturnDesc->String.Pointer,
Operand[0]->Buffer.Pointer, Length);
break;
case AML_CONCAT_RES_OP:
/* ConcatenateResTemplate (Buffer, Buffer, Result) (ACPI 2.0) */
Status = AcpiExConcatTemplate (Operand[0], Operand[1],
&ReturnDesc, WalkState);
break;
case AML_INDEX_OP: /* Index (Source Index Result) */
/* Create the internal return object */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Initialize the Index reference object */
Index = Operand[1]->Integer.Value;
ReturnDesc->Reference.Value = (UINT32) Index;
ReturnDesc->Reference.Class = ACPI_REFCLASS_INDEX;
/*
* At this point, the Source operand is a String, Buffer, or Package.
* Verify that the index is within range.
*/
switch ((Operand[0])->Common.Type)
{
case ACPI_TYPE_STRING:
if (Index >= Operand[0]->String.Length)
{
Status = AE_AML_STRING_LIMIT;
}
ReturnDesc->Reference.TargetType = ACPI_TYPE_BUFFER_FIELD;
break;
case ACPI_TYPE_BUFFER:
if (Index >= Operand[0]->Buffer.Length)
{
Status = AE_AML_BUFFER_LIMIT;
}
ReturnDesc->Reference.TargetType = ACPI_TYPE_BUFFER_FIELD;
break;
case ACPI_TYPE_PACKAGE:
if (Index >= Operand[0]->Package.Count)
{
Status = AE_AML_PACKAGE_LIMIT;
}
ReturnDesc->Reference.TargetType = ACPI_TYPE_PACKAGE;
ReturnDesc->Reference.Where = &Operand[0]->Package.Elements [Index];
break;
default:
Status = AE_AML_INTERNAL;
goto Cleanup;
}
/* Failure means that the Index was beyond the end of the object */
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Index (0x%8.8X%8.8X) is beyond end of object",
ACPI_FORMAT_UINT64 (Index)));
goto Cleanup;
}
/*
* Save the target object and add a reference to it for the life
* of the index
*/
ReturnDesc->Reference.Object = Operand[0];
AcpiUtAddReference (Operand[0]);
/* Store the reference to the Target */
Status = AcpiExStore (ReturnDesc, Operand[2], WalkState);
/* Return the reference */
WalkState->ResultObj = ReturnDesc;
goto Cleanup;
default:
ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
WalkState->Opcode));
Status = AE_AML_BAD_OPCODE;
break;
}
StoreResultToTarget:
if (ACPI_SUCCESS (Status))
{
/*
* Store the result of the operation (which is now in ReturnDesc) into
* the Target descriptor.
*/
Status = AcpiExStore (ReturnDesc, Operand[2], WalkState);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
if (!WalkState->ResultObj)
{
WalkState->ResultObj = ReturnDesc;
}
}
Cleanup:
/* Delete return object on error */
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ReturnDesc);
WalkState->ResultObj = NULL;
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExOpcode_2A_0T_1R
*
* PARAMETERS: WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value
*
******************************************************************************/
ACPI_STATUS
AcpiExOpcode_2A_0T_1R (
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
ACPI_STATUS Status = AE_OK;
BOOLEAN LogicalResult = FALSE;
ACPI_FUNCTION_TRACE_STR (ExOpcode_2A_0T_1R,
AcpiPsGetOpcodeName (WalkState->Opcode));
/* Create the internal return object */
ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Execute the Opcode */
if (WalkState->OpInfo->Flags & AML_LOGICAL_NUMERIC)
{
/* LogicalOp (Operand0, Operand1) */
Status = AcpiExDoLogicalNumericOp (WalkState->Opcode,
Operand[0]->Integer.Value, Operand[1]->Integer.Value,
&LogicalResult);
goto StoreLogicalResult;
}
else if (WalkState->OpInfo->Flags & AML_LOGICAL)
{
/* LogicalOp (Operand0, Operand1) */
Status = AcpiExDoLogicalOp (WalkState->Opcode, Operand[0],
Operand[1], &LogicalResult);
goto StoreLogicalResult;
}
switch (WalkState->Opcode)
{
case AML_ACQUIRE_OP: /* Acquire (MutexObject, Timeout) */
Status = AcpiExAcquireMutex (Operand[1], Operand[0], WalkState);
if (Status == AE_TIME)
{
LogicalResult = TRUE; /* TRUE = Acquire timed out */
Status = AE_OK;
}
break;
case AML_WAIT_OP: /* Wait (EventObject, Timeout) */
Status = AcpiExSystemWaitEvent (Operand[1], Operand[0]);
if (Status == AE_TIME)
{
LogicalResult = TRUE; /* TRUE, Wait timed out */
Status = AE_OK;
}
break;
default:
ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
WalkState->Opcode));
Status = AE_AML_BAD_OPCODE;
goto Cleanup;
}
StoreLogicalResult:
/*
* Set return value to according to LogicalResult. logical TRUE (all ones)
* Default is FALSE (zero)
*/
if (LogicalResult)
{
ReturnDesc->Integer.Value = ACPI_UINT64_MAX;
}
Cleanup:
/* Delete return object on error */
if (ACPI_FAILURE (Status))
{
AcpiUtRemoveReference (ReturnDesc);
}
/* Save return object on success */
else
{
WalkState->ResultObj = ReturnDesc;
}
return_ACPI_STATUS (Status);
}
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