diff options
Diffstat (limited to 'sys/contrib/dev/acpica/components/executer/exstorob.c')
-rw-r--r-- | sys/contrib/dev/acpica/components/executer/exstorob.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/executer/exstorob.c b/sys/contrib/dev/acpica/components/executer/exstorob.c new file mode 100644 index 0000000..1ee3309 --- /dev/null +++ b/sys/contrib/dev/acpica/components/executer/exstorob.c @@ -0,0 +1,244 @@ + +/****************************************************************************** + * + * Module Name: exstorob - AML Interpreter object store support, store to object + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, 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 __EXSTOROB_C__ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acinterp.h> + + +#define _COMPONENT ACPI_EXECUTER + ACPI_MODULE_NAME ("exstorob") + + +/******************************************************************************* + * + * FUNCTION: AcpiExStoreBufferToBuffer + * + * PARAMETERS: SourceDesc - Source object to copy + * TargetDesc - Destination object of the copy + * + * RETURN: Status + * + * DESCRIPTION: Copy a buffer object to another buffer object. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiExStoreBufferToBuffer ( + ACPI_OPERAND_OBJECT *SourceDesc, + ACPI_OPERAND_OBJECT *TargetDesc) +{ + UINT32 Length; + UINT8 *Buffer; + + + ACPI_FUNCTION_TRACE_PTR (ExStoreBufferToBuffer, SourceDesc); + + + /* If Source and Target are the same, just return */ + + if (SourceDesc == TargetDesc) + { + return_ACPI_STATUS (AE_OK); + } + + /* We know that SourceDesc is a buffer by now */ + + Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->Buffer.Pointer); + Length = SourceDesc->Buffer.Length; + + /* + * If target is a buffer of length zero or is a static buffer, + * allocate a new buffer of the proper length + */ + if ((TargetDesc->Buffer.Length == 0) || + (TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER)) + { + TargetDesc->Buffer.Pointer = ACPI_ALLOCATE (Length); + if (!TargetDesc->Buffer.Pointer) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + TargetDesc->Buffer.Length = Length; + } + + /* Copy source buffer to target buffer */ + + if (Length <= TargetDesc->Buffer.Length) + { + /* Clear existing buffer and copy in the new one */ + + ACPI_MEMSET (TargetDesc->Buffer.Pointer, 0, TargetDesc->Buffer.Length); + ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, Length); + +#ifdef ACPI_OBSOLETE_BEHAVIOR + /* + * NOTE: ACPI versions up to 3.0 specified that the buffer must be + * truncated if the string is smaller than the buffer. However, "other" + * implementations of ACPI never did this and thus became the defacto + * standard. ACPI 3.0A changes this behavior such that the buffer + * is no longer truncated. + */ + + /* + * OBSOLETE BEHAVIOR: + * If the original source was a string, we must truncate the buffer, + * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer + * copy must not truncate the original buffer. + */ + if (OriginalSrcType == ACPI_TYPE_STRING) + { + /* Set the new length of the target */ + + TargetDesc->Buffer.Length = Length; + } +#endif + } + else + { + /* Truncate the source, copy only what will fit */ + + ACPI_MEMCPY (TargetDesc->Buffer.Pointer, Buffer, + TargetDesc->Buffer.Length); + + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, + "Truncating source buffer from %X to %X\n", + Length, TargetDesc->Buffer.Length)); + } + + /* Copy flags */ + + TargetDesc->Buffer.Flags = SourceDesc->Buffer.Flags; + TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiExStoreStringToString + * + * PARAMETERS: SourceDesc - Source object to copy + * TargetDesc - Destination object of the copy + * + * RETURN: Status + * + * DESCRIPTION: Copy a String object to another String object + * + ******************************************************************************/ + +ACPI_STATUS +AcpiExStoreStringToString ( + ACPI_OPERAND_OBJECT *SourceDesc, + ACPI_OPERAND_OBJECT *TargetDesc) +{ + UINT32 Length; + UINT8 *Buffer; + + + ACPI_FUNCTION_TRACE_PTR (ExStoreStringToString, SourceDesc); + + + /* If Source and Target are the same, just return */ + + if (SourceDesc == TargetDesc) + { + return_ACPI_STATUS (AE_OK); + } + + /* We know that SourceDesc is a string by now */ + + Buffer = ACPI_CAST_PTR (UINT8, SourceDesc->String.Pointer); + Length = SourceDesc->String.Length; + + /* + * Replace existing string value if it will fit and the string + * pointer is not a static pointer (part of an ACPI table) + */ + if ((Length < TargetDesc->String.Length) && + (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) + { + /* + * String will fit in existing non-static buffer. + * Clear old string and copy in the new one + */ + ACPI_MEMSET (TargetDesc->String.Pointer, 0, + (ACPI_SIZE) TargetDesc->String.Length + 1); + ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); + } + else + { + /* + * Free the current buffer, then allocate a new buffer + * large enough to hold the value + */ + if (TargetDesc->String.Pointer && + (!(TargetDesc->Common.Flags & AOPOBJ_STATIC_POINTER))) + { + /* Only free if not a pointer into the DSDT */ + + ACPI_FREE (TargetDesc->String.Pointer); + } + + TargetDesc->String.Pointer = ACPI_ALLOCATE_ZEROED ( + (ACPI_SIZE) Length + 1); + if (!TargetDesc->String.Pointer) + { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + TargetDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER; + ACPI_MEMCPY (TargetDesc->String.Pointer, Buffer, Length); + } + + /* Set the new target length */ + + TargetDesc->String.Length = Length; + return_ACPI_STATUS (AE_OK); +} + + |