![Bob Moore](/assets/img/avatar_default.png)
Update all copyrights to 2012. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
222 lines
7.1 KiB
C
222 lines
7.1 KiB
C
|
|
/******************************************************************************
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "acinterp.h"
|
|
|
|
#define _COMPONENT ACPI_EXECUTER
|
|
ACPI_MODULE_NAME("exstorob")
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_store_buffer_to_buffer
|
|
*
|
|
* PARAMETERS: source_desc - Source object to copy
|
|
* target_desc - Destination object of the copy
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Copy a buffer object to another buffer object.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_ex_store_buffer_to_buffer(union acpi_operand_object *source_desc,
|
|
union acpi_operand_object *target_desc)
|
|
{
|
|
u32 length;
|
|
u8 *buffer;
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ex_store_buffer_to_buffer, source_desc);
|
|
|
|
/* If Source and Target are the same, just return */
|
|
|
|
if (source_desc == target_desc) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* We know that source_desc is a buffer by now */
|
|
|
|
buffer = ACPI_CAST_PTR(u8, source_desc->buffer.pointer);
|
|
length = source_desc->buffer.length;
|
|
|
|
/*
|
|
* If target is a buffer of length zero or is a static buffer,
|
|
* allocate a new buffer of the proper length
|
|
*/
|
|
if ((target_desc->buffer.length == 0) ||
|
|
(target_desc->common.flags & AOPOBJ_STATIC_POINTER)) {
|
|
target_desc->buffer.pointer = ACPI_ALLOCATE(length);
|
|
if (!target_desc->buffer.pointer) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
target_desc->buffer.length = length;
|
|
}
|
|
|
|
/* Copy source buffer to target buffer */
|
|
|
|
if (length <= target_desc->buffer.length) {
|
|
|
|
/* Clear existing buffer and copy in the new one */
|
|
|
|
ACPI_MEMSET(target_desc->buffer.pointer, 0,
|
|
target_desc->buffer.length);
|
|
ACPI_MEMCPY(target_desc->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 3.0_a 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 (original_src_type == ACPI_TYPE_STRING) {
|
|
|
|
/* Set the new length of the target */
|
|
|
|
target_desc->buffer.length = length;
|
|
}
|
|
#endif
|
|
} else {
|
|
/* Truncate the source, copy only what will fit */
|
|
|
|
ACPI_MEMCPY(target_desc->buffer.pointer, buffer,
|
|
target_desc->buffer.length);
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Truncating source buffer from %X to %X\n",
|
|
length, target_desc->buffer.length));
|
|
}
|
|
|
|
/* Copy flags */
|
|
|
|
target_desc->buffer.flags = source_desc->buffer.flags;
|
|
target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_store_string_to_string
|
|
*
|
|
* PARAMETERS: source_desc - Source object to copy
|
|
* target_desc - Destination object of the copy
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Copy a String object to another String object
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ex_store_string_to_string(union acpi_operand_object *source_desc,
|
|
union acpi_operand_object *target_desc)
|
|
{
|
|
u32 length;
|
|
u8 *buffer;
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ex_store_string_to_string, source_desc);
|
|
|
|
/* If Source and Target are the same, just return */
|
|
|
|
if (source_desc == target_desc) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* We know that source_desc is a string by now */
|
|
|
|
buffer = ACPI_CAST_PTR(u8, source_desc->string.pointer);
|
|
length = source_desc->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 < target_desc->string.length) &&
|
|
(!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
|
|
/*
|
|
* String will fit in existing non-static buffer.
|
|
* Clear old string and copy in the new one
|
|
*/
|
|
ACPI_MEMSET(target_desc->string.pointer, 0,
|
|
(acpi_size) target_desc->string.length + 1);
|
|
ACPI_MEMCPY(target_desc->string.pointer, buffer, length);
|
|
} else {
|
|
/*
|
|
* Free the current buffer, then allocate a new buffer
|
|
* large enough to hold the value
|
|
*/
|
|
if (target_desc->string.pointer &&
|
|
(!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) {
|
|
|
|
/* Only free if not a pointer into the DSDT */
|
|
|
|
ACPI_FREE(target_desc->string.pointer);
|
|
}
|
|
|
|
target_desc->string.pointer = ACPI_ALLOCATE_ZEROED((acpi_size)
|
|
length + 1);
|
|
if (!target_desc->string.pointer) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
|
|
ACPI_MEMCPY(target_desc->string.pointer, buffer, length);
|
|
}
|
|
|
|
/* Set the new target length */
|
|
|
|
target_desc->string.length = length;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|