linux/drivers/acpi/executer/exoparg3.c
Bob Moore b229cf92ee ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)

Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)

Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.

Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)

Defined and deployed a new OSL interface,
acpi_os_validate_address().  This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)

Defined and deployed a new OSL interface,
acpi_os_validate_interface().  This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)

Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)

Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.

The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-06-14 02:30:55 -04:00

271 lines
7.8 KiB
C

/******************************************************************************
*
* Module Name: exoparg3 - AML execution - opcodes with 3 arguments
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2006, R. Byron Moore
* 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 <acpi/acinterp.h>
#include <acpi/acparser.h>
#include <acpi/amlcode.h>
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME("exoparg3")
/*!
* 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: acpi_ex_opcode_3A_0T_0R
*
* PARAMETERS: walk_state - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Execute Triadic operator (3 operands)
*
******************************************************************************/
acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state)
{
union acpi_operand_object **operand = &walk_state->operands[0];
struct acpi_signal_fatal_info *fatal;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_0T_0R,
acpi_ps_get_opcode_name(walk_state->opcode));
switch (walk_state->opcode) {
case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
(u32) operand[0]->integer.value,
(u32) operand[1]->integer.value,
(u32) operand[2]->integer.value));
fatal = ACPI_ALLOCATE(sizeof(struct acpi_signal_fatal_info));
if (fatal) {
fatal->type = (u32) operand[0]->integer.value;
fatal->code = (u32) operand[1]->integer.value;
fatal->argument = (u32) operand[2]->integer.value;
}
/* Always signal the OS! */
status = acpi_os_signal(ACPI_SIGNAL_FATAL, fatal);
/* Might return while OS is shutting down, just continue */
ACPI_FREE(fatal);
break;
default:
ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
walk_state->opcode));
status = AE_AML_BAD_OPCODE;
goto cleanup;
}
cleanup:
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_opcode_3A_1T_1R
*
* PARAMETERS: walk_state - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Execute Triadic operator (3 operands)
*
******************************************************************************/
acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state)
{
union acpi_operand_object **operand = &walk_state->operands[0];
union acpi_operand_object *return_desc = NULL;
char *buffer = NULL;
acpi_status status = AE_OK;
acpi_integer index;
acpi_size length;
ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_1T_1R,
acpi_ps_get_opcode_name(walk_state->opcode));
switch (walk_state->opcode) {
case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
/*
* Create the return object. The Source operand is guaranteed to be
* either a String or a Buffer, so just use its type.
*/
return_desc =
acpi_ut_create_internal_object(ACPI_GET_OBJECT_TYPE
(operand[0]));
if (!return_desc) {
status = AE_NO_MEMORY;
goto cleanup;
}
/* Get the Integer values from the objects */
index = operand[1]->integer.value;
length = (acpi_size) operand[2]->integer.value;
/*
* If the index is beyond the length of the String/Buffer, or if the
* requested length is zero, return a zero-length String/Buffer
*/
if (index >= operand[0]->string.length) {
length = 0;
}
/* Truncate request if larger than the actual String/Buffer */
else if ((index + length) > operand[0]->string.length) {
length = (acpi_size) operand[0]->string.length -
(acpi_size) index;
}
/* Strings always have a sub-pointer, not so for buffers */
switch (ACPI_GET_OBJECT_TYPE(operand[0])) {
case ACPI_TYPE_STRING:
/* Always allocate a new buffer for the String */
buffer = ACPI_ALLOCATE_ZEROED((acpi_size) length + 1);
if (!buffer) {
status = AE_NO_MEMORY;
goto cleanup;
}
break;
case ACPI_TYPE_BUFFER:
/* If the requested length is zero, don't allocate a buffer */
if (length > 0) {
/* Allocate a new buffer for the Buffer */
buffer = ACPI_ALLOCATE_ZEROED(length);
if (!buffer) {
status = AE_NO_MEMORY;
goto cleanup;
}
}
break;
default: /* Should not happen */
status = AE_AML_OPERAND_TYPE;
goto cleanup;
}
if (buffer) {
/* We have a buffer, copy the portion requested */
ACPI_MEMCPY(buffer, operand[0]->string.pointer + index,
length);
}
/* Set the length of the new String/Buffer */
return_desc->string.pointer = buffer;
return_desc->string.length = (u32) length;
/* Mark buffer initialized */
return_desc->buffer.flags |= AOPOBJ_DATA_VALID;
break;
default:
ACPI_ERROR((AE_INFO, "Unknown AML opcode %X",
walk_state->opcode));
status = AE_AML_BAD_OPCODE;
goto cleanup;
}
/* Store the result in the target */
status = acpi_ex_store(return_desc, operand[3], walk_state);
cleanup:
/* Delete return object on error */
if (ACPI_FAILURE(status) || walk_state->result_obj) {
acpi_ut_remove_reference(return_desc);
}
/* Set the return object and exit */
else {
walk_state->result_obj = return_desc;
}
return_ACPI_STATUS(status);
}