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| Current File : //sys/contrib/dev/acpica/compiler/aslpredef.c |
/******************************************************************************
*
* Module Name: aslpredef - support for ACPI predefined names
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2011, 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.
*/
#define ACPI_CREATE_PREDEFINED_TABLE
#include <contrib/dev/acpica/compiler/aslcompiler.h>
#include "aslcompiler.y.h"
#include <contrib/dev/acpica/include/acpredef.h>
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("aslpredef")
/* Local prototypes */
static void
ApCheckForUnexpectedReturnValue (
ACPI_PARSE_OBJECT *Op,
ASL_METHOD_INFO *MethodInfo);
static UINT32
ApCheckForSpecialName (
ACPI_PARSE_OBJECT *Op,
char *Name);
static void
ApCheckObjectType (
ACPI_PARSE_OBJECT *Op,
UINT32 ExpectedBtypes);
static void
ApGetExpectedTypes (
char *Buffer,
UINT32 ExpectedBtypes);
/*
* Names for the types that can be returned by the predefined objects.
* Used for warning messages. Must be in the same order as the ACPI_RTYPEs
*/
static const char *AcpiRtypeNames[] =
{
"/Integer",
"/String",
"/Buffer",
"/Package",
"/Reference",
};
/*
* Predefined names for use in Resource Descriptors. These names do not
* appear in the global Predefined Name table (since these names never
* appear in actual AML byte code, only in the original ASL)
*/
static const ACPI_PREDEFINED_INFO ResourceNames[] = {
{{"_ALN", 0, 0}},
{{"_ASI", 0, 0}},
{{"_ASZ", 0, 0}},
{{"_ATT", 0, 0}},
{{"_BAS", 0, 0}},
{{"_BM_", 0, 0}},
{{"_DEC", 0, 0}},
{{"_GRA", 0, 0}},
{{"_HE_", 0, 0}},
{{"_INT", 0, 0}},
{{"_LEN", 0, 0}},
{{"_LL_", 0, 0}},
{{"_MAF", 0, 0}},
{{"_MAX", 0, 0}},
{{"_MEM", 0, 0}},
{{"_MIF", 0, 0}},
{{"_MIN", 0, 0}},
{{"_MTP", 0, 0}},
{{"_RBO", 0, 0}},
{{"_RBW", 0, 0}},
{{"_RNG", 0, 0}},
{{"_RT_", 0, 0}}, /* Acpi 3.0 */
{{"_RW_", 0, 0}},
{{"_SHR", 0, 0}},
{{"_SIZ", 0, 0}},
{{"_TRA", 0, 0}},
{{"_TRS", 0, 0}},
{{"_TSF", 0, 0}}, /* Acpi 3.0 */
{{"_TTP", 0, 0}},
{{"_TYP", 0, 0}},
{{{0,0,0,0}, 0, 0}} /* Table terminator */
};
static const ACPI_PREDEFINED_INFO ScopeNames[] = {
{{"_SB_", 0, 0}},
{{"_SI_", 0, 0}},
{{"_TZ_", 0, 0}},
{{{0,0,0,0}, 0, 0}} /* Table terminator */
};
/*******************************************************************************
*
* FUNCTION: ApCheckForPredefinedMethod
*
* PARAMETERS: Op - A parse node of type "METHOD".
* MethodInfo - Saved info about this method
*
* RETURN: None
*
* DESCRIPTION: If method is a predefined name, check that the number of
* arguments and the return type (returns a value or not)
* is correct.
*
******************************************************************************/
BOOLEAN
ApCheckForPredefinedMethod (
ACPI_PARSE_OBJECT *Op,
ASL_METHOD_INFO *MethodInfo)
{
UINT32 Index;
UINT32 RequiredArgsCurrent;
UINT32 RequiredArgsOld;
/* Check for a match against the predefined name list */
Index = ApCheckForPredefinedName (Op, Op->Asl.NameSeg);
switch (Index)
{
case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */
case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */
case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */
/* Just return, nothing to do */
return (FALSE);
case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */
Gbl_ReservedMethods++;
/* NumArguments must be zero for all _Lxx/_Exx/_Wxx/_Qxx methods */
if (MethodInfo->NumArguments != 0)
{
sprintf (MsgBuffer, "%s requires %u", Op->Asl.ExternalName, 0);
AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op,
MsgBuffer);
}
break;
default:
/*
* Matched a predefined method name
*
* Validate the ASL-defined argument count. Allow two different legal
* arg counts.
*/
Gbl_ReservedMethods++;
RequiredArgsCurrent = PredefinedNames[Index].Info.ParamCount & 0x0F;
RequiredArgsOld = PredefinedNames[Index].Info.ParamCount >> 4;
if ((MethodInfo->NumArguments != RequiredArgsCurrent) &&
(MethodInfo->NumArguments != RequiredArgsOld))
{
sprintf (MsgBuffer, "%4.4s requires %u",
PredefinedNames[Index].Info.Name, RequiredArgsCurrent);
if (MethodInfo->NumArguments > RequiredArgsCurrent)
{
AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_HI, Op,
MsgBuffer);
}
else
{
AslError (ASL_WARNING, ASL_MSG_RESERVED_ARG_COUNT_LO, Op,
MsgBuffer);
}
}
/*
* Check if method returns no value, but the predefined name is
* required to return a value
*/
if (MethodInfo->NumReturnNoValue &&
PredefinedNames[Index].Info.ExpectedBtypes)
{
ApGetExpectedTypes (StringBuffer,
PredefinedNames[Index].Info.ExpectedBtypes);
sprintf (MsgBuffer, "%s required for %4.4s",
StringBuffer, PredefinedNames[Index].Info.Name);
AslError (ASL_WARNING, ASL_MSG_RESERVED_RETURN_VALUE, Op,
MsgBuffer);
}
break;
}
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: ApCheckForUnexpectedReturnValue
*
* PARAMETERS: Op - A parse node of type "RETURN".
* MethodInfo - Saved info about this method
*
* RETURN: None
*
* DESCRIPTION: Check for an unexpected return value from a predefined method.
* Invoked for predefined methods that are defined to not return
* any value. If there is a return value, issue a remark, since
* the ASL writer may be confused as to the method definition
* and/or functionality.
*
* Note: We ignore all return values of "Zero", since this is what a standalone
* Return() statement will always generate -- so we ignore it here --
* i.e., there is no difference between Return() and Return(Zero).
* Also, a null Return() will be disassembled to return(Zero) -- so, we
* don't want to generate extraneous remarks/warnings for a disassembled
* ASL file.
*
******************************************************************************/
static void
ApCheckForUnexpectedReturnValue (
ACPI_PARSE_OBJECT *Op,
ASL_METHOD_INFO *MethodInfo)
{
ACPI_PARSE_OBJECT *ReturnValueOp;
/* Ignore Return() and Return(Zero) (they are the same) */
ReturnValueOp = Op->Asl.Child;
if (ReturnValueOp->Asl.ParseOpcode == PARSEOP_ZERO)
{
return;
}
/* We have a valid return value, but the reserved name did not expect it */
AslError (ASL_WARNING, ASL_MSG_RESERVED_NO_RETURN_VAL,
Op, MethodInfo->Op->Asl.ExternalName);
}
/*******************************************************************************
*
* FUNCTION: ApCheckPredefinedReturnValue
*
* PARAMETERS: Op - A parse node of type "RETURN".
* MethodInfo - Saved info about this method
*
* RETURN: None
*
* DESCRIPTION: If method is a predefined name, attempt to validate the return
* value. Only "static" types can be validated - a simple return
* of an integer/string/buffer/package or a named reference to
* a static object. Values such as a Localx or Argx or a control
* method invocation are not checked. Issue a warning if there is
* a valid return value, but the reserved method defines no
* return value.
*
******************************************************************************/
void
ApCheckPredefinedReturnValue (
ACPI_PARSE_OBJECT *Op,
ASL_METHOD_INFO *MethodInfo)
{
UINT32 Index;
ACPI_PARSE_OBJECT *ReturnValueOp;
/* Check parent method for a match against the predefined name list */
Index = ApCheckForPredefinedName (MethodInfo->Op,
MethodInfo->Op->Asl.NameSeg);
switch (Index)
{
case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */
/* No return value expected, warn if there is one */
ApCheckForUnexpectedReturnValue (Op, MethodInfo);
return;
case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */
case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */
case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */
/* Just return, nothing to do */
return;
default: /* A standard predefined ACPI name */
if (!PredefinedNames[Index].Info.ExpectedBtypes)
{
/* No return value expected, warn if there is one */
ApCheckForUnexpectedReturnValue (Op, MethodInfo);
return;
}
/* Get the object returned, it is the next argument */
ReturnValueOp = Op->Asl.Child;
switch (ReturnValueOp->Asl.ParseOpcode)
{
case PARSEOP_ZERO:
case PARSEOP_ONE:
case PARSEOP_ONES:
case PARSEOP_INTEGER:
case PARSEOP_STRING_LITERAL:
case PARSEOP_BUFFER:
case PARSEOP_PACKAGE:
/* Static data return object - check against expected type */
ApCheckObjectType (ReturnValueOp,
PredefinedNames[Index].Info.ExpectedBtypes);
break;
default:
/*
* All other ops are very difficult or impossible to typecheck at
* compile time. These include all Localx, Argx, and method
* invocations. Also, NAMESEG and NAMESTRING because the type of
* any named object can be changed at runtime (for example,
* CopyObject will change the type of the target object.)
*/
break;
}
}
}
/*******************************************************************************
*
* FUNCTION: ApCheckForPredefinedObject
*
* PARAMETERS: Op - A parse node
* Name - The ACPI name to be checked
*
* RETURN: None
*
* DESCRIPTION: Check for a predefined name for a static object (created via
* the ASL Name operator). If it is a predefined ACPI name, ensure
* that the name does not require any arguments (which would
* require a control method implemenation of the name), and that
* the type of the object is one of the expected types for the
* predefined name.
*
******************************************************************************/
void
ApCheckForPredefinedObject (
ACPI_PARSE_OBJECT *Op,
char *Name)
{
UINT32 Index;
/*
* Check for a real predefined name -- not a resource descriptor name
* or a predefined scope name
*/
Index = ApCheckForPredefinedName (Op, Name);
switch (Index)
{
case ACPI_NOT_RESERVED_NAME: /* No underscore or _Txx or _xxx name not matched */
case ACPI_PREDEFINED_NAME: /* Resource Name or reserved scope name */
case ACPI_COMPILER_RESERVED_NAME: /* A _Txx that was not emitted by compiler */
/* Nothing to do */
return;
case ACPI_EVENT_RESERVED_NAME: /* _Lxx/_Exx/_Wxx/_Qxx methods */
/*
* These names must be control methods, by definition in ACPI spec.
* Also because they are defined to return no value. None of them
* require any arguments.
*/
AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
"with zero arguments");
return;
default: /* A standard predefined ACPI name */
/*
* If this predefined name requires input arguments, then
* it must be implemented as a control method
*/
if (PredefinedNames[Index].Info.ParamCount > 0)
{
AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
"with arguments");
return;
}
/*
* If no return value is expected from this predefined name, then
* it follows that it must be implemented as a control method
* (with zero args, because the args > 0 case was handled above)
* Examples are: _DIS, _INI, _IRC, _OFF, _ON, _PSx
*/
if (!PredefinedNames[Index].Info.ExpectedBtypes)
{
AslError (ASL_ERROR, ASL_MSG_RESERVED_METHOD, Op,
"with zero arguments");
return;
}
/* Typecheck the actual object, it is the next argument */
ApCheckObjectType (Op->Asl.Child->Asl.Next,
PredefinedNames[Index].Info.ExpectedBtypes);
return;
}
}
/*******************************************************************************
*
* FUNCTION: ApCheckForPredefinedName
*
* PARAMETERS: Op - A parse node
* Name - NameSeg to check
*
* RETURN: None
*
* DESCRIPTION: Check a NameSeg against the reserved list.
*
******************************************************************************/
UINT32
ApCheckForPredefinedName (
ACPI_PARSE_OBJECT *Op,
char *Name)
{
UINT32 i;
if (Name[0] == 0)
{
AcpiOsPrintf ("Found a null name, external = %s\n",
Op->Asl.ExternalName);
}
/* All reserved names are prefixed with a single underscore */
if (Name[0] != '_')
{
return (ACPI_NOT_RESERVED_NAME);
}
/* Check for a standard predefined method name */
for (i = 0; PredefinedNames[i].Info.Name[0]; i++)
{
if (ACPI_COMPARE_NAME (Name, PredefinedNames[i].Info.Name))
{
/* Return index into predefined array */
return (i);
}
}
/* Check for resource names and predefined scope names */
for (i = 0; ResourceNames[i].Info.Name[0]; i++)
{
if (ACPI_COMPARE_NAME (Name, ResourceNames[i].Info.Name))
{
return (ACPI_PREDEFINED_NAME);
}
}
for (i = 0; ScopeNames[i].Info.Name[0]; i++)
{
if (ACPI_COMPARE_NAME (Name, ScopeNames[i].Info.Name))
{
return (ACPI_PREDEFINED_NAME);
}
}
/* Check for _Lxx/_Exx/_Wxx/_Qxx/_T_x. Warning if unknown predefined name */
return (ApCheckForSpecialName (Op, Name));
}
/*******************************************************************************
*
* FUNCTION: ApCheckForSpecialName
*
* PARAMETERS: Op - A parse node
* Name - NameSeg to check
*
* RETURN: None
*
* DESCRIPTION: Check for the "special" predefined names -
* _Lxx, _Exx, _Qxx, _Wxx, and _T_x
*
******************************************************************************/
static UINT32
ApCheckForSpecialName (
ACPI_PARSE_OBJECT *Op,
char *Name)
{
/*
* Check for the "special" predefined names. We already know that the
* first character is an underscore.
* GPE: _Lxx
* GPE: _Exx
* GPE: _Wxx
* EC: _Qxx
*/
if ((Name[1] == 'L') ||
(Name[1] == 'E') ||
(Name[1] == 'W') ||
(Name[1] == 'Q'))
{
/* The next two characters must be hex digits */
if ((isxdigit ((int) Name[2])) &&
(isxdigit ((int) Name[3])))
{
return (ACPI_EVENT_RESERVED_NAME);
}
}
/* Check for the names reserved for the compiler itself: _T_x */
else if ((Op->Asl.ExternalName[1] == 'T') &&
(Op->Asl.ExternalName[2] == '_'))
{
/* Ignore if actually emitted by the compiler */
if (Op->Asl.CompileFlags & NODE_COMPILER_EMITTED)
{
return (ACPI_NOT_RESERVED_NAME);
}
/*
* Was not actually emitted by the compiler. This is a special case,
* however. If the ASL code being compiled was the result of a
* dissasembly, it may possibly contain valid compiler-emitted names
* of the form "_T_x". We don't want to issue an error or even a
* warning and force the user to manually change the names. So, we
* will issue a remark instead.
*/
AslError (ASL_REMARK, ASL_MSG_COMPILER_RESERVED, Op, Op->Asl.ExternalName);
return (ACPI_COMPILER_RESERVED_NAME);
}
/*
* The name didn't match any of the known predefined names. Flag it as a
* warning, since the entire namespace starting with an underscore is
* reserved by the ACPI spec.
*/
AslError (ASL_WARNING, ASL_MSG_UNKNOWN_RESERVED_NAME, Op,
Op->Asl.ExternalName);
return (ACPI_NOT_RESERVED_NAME);
}
/*******************************************************************************
*
* FUNCTION: ApCheckObjectType
*
* PARAMETERS: Op - Current parse node
* ExpectedBtypes - Bitmap of expected return type(s)
*
* RETURN: None
*
* DESCRIPTION: Check if the object type is one of the types that is expected
* by the predefined name. Only a limited number of object types
* can be returned by the predefined names.
*
******************************************************************************/
static void
ApCheckObjectType (
ACPI_PARSE_OBJECT *Op,
UINT32 ExpectedBtypes)
{
UINT32 ReturnBtype;
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_ZERO:
case PARSEOP_ONE:
case PARSEOP_ONES:
case PARSEOP_INTEGER:
ReturnBtype = ACPI_RTYPE_INTEGER;
break;
case PARSEOP_BUFFER:
ReturnBtype = ACPI_RTYPE_BUFFER;
break;
case PARSEOP_STRING_LITERAL:
ReturnBtype = ACPI_RTYPE_STRING;
break;
case PARSEOP_PACKAGE:
ReturnBtype = ACPI_RTYPE_PACKAGE;
break;
default:
/* Not one of the supported object types */
goto TypeErrorExit;
}
/* Exit if the object is one of the expected types */
if (ReturnBtype & ExpectedBtypes)
{
return;
}
TypeErrorExit:
/* Format the expected types and emit an error message */
ApGetExpectedTypes (StringBuffer, ExpectedBtypes);
sprintf (MsgBuffer, "found %s, requires %s",
UtGetOpName (Op->Asl.ParseOpcode), StringBuffer);
AslError (ASL_ERROR, ASL_MSG_RESERVED_OPERAND_TYPE, Op,
MsgBuffer);
}
/*******************************************************************************
*
* FUNCTION: ApDisplayReservedNames
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Dump information about the ACPI predefined names and predefined
* resource descriptor names.
*
******************************************************************************/
void
ApDisplayReservedNames (
void)
{
const ACPI_PREDEFINED_INFO *ThisName;
char TypeBuffer[48]; /* Room for 5 types */
UINT32 Count;
/*
* Predefined names/methods
*/
printf ("\nPredefined Name Information\n\n");
Count = 0;
ThisName = PredefinedNames;
while (ThisName->Info.Name[0])
{
printf ("%4.4s Requires %u arguments, ",
ThisName->Info.Name, ThisName->Info.ParamCount & 0x0F);
if (ThisName->Info.ExpectedBtypes)
{
ApGetExpectedTypes (TypeBuffer, ThisName->Info.ExpectedBtypes);
printf ("Must return: %s\n", TypeBuffer);
}
else
{
printf ("No return value\n");
}
/*
* Skip next entry in the table if this name returns a Package
* (next entry contains the package info)
*/
if (ThisName->Info.ExpectedBtypes & ACPI_RTYPE_PACKAGE)
{
ThisName++;
}
Count++;
ThisName++;
}
printf ("%u Predefined Names are recognized\n", Count);
/*
* Resource Descriptor names
*/
printf ("\nResource Descriptor Predefined Names\n\n");
Count = 0;
ThisName = ResourceNames;
while (ThisName->Info.Name[0])
{
printf ("%4.4s Resource Descriptor\n", ThisName->Info.Name);
Count++;
ThisName++;
}
printf ("%u Resource Descriptor Names are recognized\n", Count);
/*
* Predefined scope names
*/
printf ("\nPredefined Scope Names\n\n");
ThisName = ScopeNames;
while (ThisName->Info.Name[0])
{
printf ("%4.4s Scope\n", ThisName->Info.Name);
ThisName++;
}
}
/*******************************************************************************
*
* FUNCTION: ApGetExpectedTypes
*
* PARAMETERS: Buffer - Where the formatted string is returned
* ExpectedBTypes - Bitfield of expected data types
*
* RETURN: None, formatted string
*
* DESCRIPTION: Format the expected object types into a printable string.
*
******************************************************************************/
static void
ApGetExpectedTypes (
char *Buffer,
UINT32 ExpectedBtypes)
{
UINT32 ThisRtype;
UINT32 i;
UINT32 j;
j = 1;
Buffer[0] = 0;
ThisRtype = ACPI_RTYPE_INTEGER;
for (i = 0; i < ACPI_NUM_RTYPES; i++)
{
/* If one of the expected types, concatenate the name of this type */
if (ExpectedBtypes & ThisRtype)
{
ACPI_STRCAT (Buffer, &AcpiRtypeNames[i][j]);
j = 0; /* Use name separator from now on */
}
ThisRtype <<= 1; /* Next Rtype */
}
}