mirror of
https://github.com/torvalds/linux
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50eca3eb89
Completed a major overhaul of the Resource Manager code - specifically, optimizations in the area of the AML/internal resource conversion code. The code has been optimized to simplify and eliminate duplicated code, CPU stack use has been decreased by optimizing function parameters and local variables, and naming conventions across the manager have been standardized for clarity and ease of maintenance (this includes function, parameter, variable, and struct/typedef names.) All Resource Manager dispatch and information tables have been moved to a single location for clarity and ease of maintenance. One new file was created, named "rsinfo.c". The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to guarantee that the argument is not evaluated twice, making them less prone to macro side-effects. However, since there exists the possibility of additional stack use if a particular compiler cannot optimize them (such as in the debug generation case), the original macros are optionally available. Note that some invocations of the return_VALUE macro may now cause size mismatch warnings; the return_UINT8 and return_UINT32 macros are provided to eliminate these. (From Randy Dunlap) Implemented a new mechanism to enable debug tracing for individual control methods. A new external interface, acpi_debug_trace(), is provided to enable this mechanism. The intent is to allow the host OS to easily enable and disable tracing for problematic control methods. This interface can be easily exposed to a user or debugger interface if desired. See the file psxface.c for details. acpi_ut_callocate() will now return a valid pointer if a length of zero is specified - a length of one is used and a warning is issued. This matches the behavior of acpi_ut_allocate(). Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
702 lines
18 KiB
C
702 lines
18 KiB
C
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/******************************************************************************
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*
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* Module Name: exresop - AML Interpreter operand/object resolution
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/amlcode.h>
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#include <acpi/acparser.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exresop")
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/* Local prototypes */
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static acpi_status
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acpi_ex_check_object_type(acpi_object_type type_needed,
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acpi_object_type this_type, void *object);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_check_object_type
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*
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* PARAMETERS: type_needed Object type needed
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* this_type Actual object type
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* Object Object pointer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check required type against actual type
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*
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******************************************************************************/
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static acpi_status
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acpi_ex_check_object_type(acpi_object_type type_needed,
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acpi_object_type this_type, void *object)
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{
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ACPI_FUNCTION_NAME("ex_check_object_type");
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if (type_needed == ACPI_TYPE_ANY) {
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/* All types OK, so we don't perform any typechecks */
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return (AE_OK);
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}
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if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
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/*
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* Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
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* objects and thus allow them to be targets. (As per the ACPI
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* specification, a store to a constant is a noop.)
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*/
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if ((this_type == ACPI_TYPE_INTEGER) &&
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(((union acpi_operand_object *)object)->common.
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flags & AOPOBJ_AML_CONSTANT)) {
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return (AE_OK);
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}
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}
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if (type_needed != this_type) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Needed [%s], found [%s] %p\n",
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acpi_ut_get_type_name(type_needed),
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acpi_ut_get_type_name(this_type), object));
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return (AE_AML_OPERAND_TYPE);
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_resolve_operands
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*
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* PARAMETERS: Opcode - Opcode being interpreted
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* stack_ptr - Pointer to the operand stack to be
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* resolved
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* walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert multiple input operands to the types required by the
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* target operator.
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*
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* Each 5-bit group in arg_types represents one required
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* operand and indicates the required Type. The corresponding operand
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* will be converted to the required type if possible, otherwise we
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* abort with an exception.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_resolve_operands(u16 opcode,
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union acpi_operand_object ** stack_ptr,
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struct acpi_walk_state * walk_state)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status = AE_OK;
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u8 object_type;
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void *temp_node;
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u32 arg_types;
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const struct acpi_opcode_info *op_info;
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u32 this_arg_type;
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acpi_object_type type_needed;
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u16 target_op = 0;
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ACPI_FUNCTION_TRACE_U32("ex_resolve_operands", opcode);
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op_info = acpi_ps_get_opcode_info(opcode);
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if (op_info->class == AML_CLASS_UNKNOWN) {
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return_ACPI_STATUS(AE_AML_BAD_OPCODE);
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}
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arg_types = op_info->runtime_args;
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if (arg_types == ARGI_INVALID_OPCODE) {
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ACPI_REPORT_ERROR(("resolve_operands: %X is not a valid AML opcode\n", opcode));
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return_ACPI_STATUS(AE_AML_INTERNAL);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Opcode %X [%s] required_operand_types=%8.8X\n",
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opcode, op_info->name, arg_types));
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/*
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* Normal exit is with (arg_types == 0) at end of argument list.
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* Function will return an exception from within the loop upon
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* finding an entry which is not (or cannot be converted
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* to) the required type; if stack underflows; or upon
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* finding a NULL stack entry (which should not happen).
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*/
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while (GET_CURRENT_ARG_TYPE(arg_types)) {
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if (!stack_ptr || !*stack_ptr) {
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ACPI_REPORT_ERROR(("resolve_operands: Null stack entry at %p\n", stack_ptr));
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return_ACPI_STATUS(AE_AML_INTERNAL);
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}
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/* Extract useful items */
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obj_desc = *stack_ptr;
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/* Decode the descriptor type */
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switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
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case ACPI_DESC_TYPE_NAMED:
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/* Namespace Node */
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object_type =
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((struct acpi_namespace_node *)obj_desc)->type;
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break;
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case ACPI_DESC_TYPE_OPERAND:
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/* ACPI internal object */
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object_type = ACPI_GET_OBJECT_TYPE(obj_desc);
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/* Check for bad acpi_object_type */
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if (!acpi_ut_valid_object_type(object_type)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Bad operand object type [%X]\n",
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object_type));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
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/* Decode the Reference */
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op_info = acpi_ps_get_opcode_info(opcode);
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if (op_info->class == AML_CLASS_UNKNOWN) {
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return_ACPI_STATUS(AE_AML_BAD_OPCODE);
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}
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switch (obj_desc->reference.opcode) {
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case AML_DEBUG_OP:
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target_op = AML_DEBUG_OP;
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/*lint -fallthrough */
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case AML_NAME_OP:
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case AML_INDEX_OP:
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case AML_REF_OF_OP:
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case AML_ARG_OP:
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case AML_LOCAL_OP:
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case AML_LOAD_OP: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
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case AML_INT_NAMEPATH_OP: /* Reference to a named object */
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ACPI_DEBUG_ONLY_MEMBERS(ACPI_DEBUG_PRINT
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((ACPI_DB_EXEC,
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"Operand is a Reference, ref_opcode [%s]\n",
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(acpi_ps_get_opcode_info
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(obj_desc->
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reference.
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opcode))->
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name)));
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break;
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default:
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Operand is a Reference, Unknown Reference Opcode %X [%s]\n",
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obj_desc->reference.
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opcode,
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(acpi_ps_get_opcode_info
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(obj_desc->reference.
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opcode))->name));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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}
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break;
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default:
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/* Invalid descriptor */
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Invalid descriptor %p [%s]\n",
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obj_desc,
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acpi_ut_get_descriptor_name
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(obj_desc)));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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/* Get one argument type, point to the next */
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this_arg_type = GET_CURRENT_ARG_TYPE(arg_types);
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INCREMENT_ARG_LIST(arg_types);
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/*
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* Handle cases where the object does not need to be
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* resolved to a value
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*/
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switch (this_arg_type) {
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case ARGI_REF_OR_STRING: /* Can be a String or Reference */
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if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
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ACPI_DESC_TYPE_OPERAND)
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&& (ACPI_GET_OBJECT_TYPE(obj_desc) ==
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ACPI_TYPE_STRING)) {
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/*
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* String found - the string references a named object and
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* must be resolved to a node
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*/
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goto next_operand;
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}
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/*
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* Else not a string - fall through to the normal Reference
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* case below
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*/
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/*lint -fallthrough */
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case ARGI_REFERENCE: /* References: */
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case ARGI_INTEGER_REF:
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case ARGI_OBJECT_REF:
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case ARGI_DEVICE_REF:
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case ARGI_TARGETREF: /* Allows implicit conversion rules before store */
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case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */
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case ARGI_SIMPLE_TARGET: /* Name, Local, or Arg - no implicit conversion */
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/*
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* Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
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* A Namespace Node is OK as-is
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*/
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if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
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ACPI_DESC_TYPE_NAMED) {
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goto next_operand;
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}
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status =
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acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
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object_type, obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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if (obj_desc->reference.opcode == AML_NAME_OP) {
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/* Convert a named reference to the actual named object */
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temp_node = obj_desc->reference.object;
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acpi_ut_remove_reference(obj_desc);
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(*stack_ptr) = temp_node;
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}
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goto next_operand;
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case ARGI_DATAREFOBJ: /* Store operator only */
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/*
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* We don't want to resolve index_op reference objects during
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* a store because this would be an implicit de_ref_of operation.
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* Instead, we just want to store the reference object.
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* -- All others must be resolved below.
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*/
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if ((opcode == AML_STORE_OP) &&
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(ACPI_GET_OBJECT_TYPE(*stack_ptr) ==
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ACPI_TYPE_LOCAL_REFERENCE)
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&& ((*stack_ptr)->reference.opcode ==
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AML_INDEX_OP)) {
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goto next_operand;
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}
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break;
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default:
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/* All cases covered above */
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break;
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}
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/*
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* Resolve this object to a value
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*/
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status = acpi_ex_resolve_to_value(stack_ptr, walk_state);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Get the resolved object */
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obj_desc = *stack_ptr;
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/*
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* Check the resulting object (value) type
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*/
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switch (this_arg_type) {
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/*
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* For the simple cases, only one type of resolved object
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* is allowed
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*/
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case ARGI_MUTEX:
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/* Need an operand of type ACPI_TYPE_MUTEX */
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type_needed = ACPI_TYPE_MUTEX;
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break;
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case ARGI_EVENT:
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/* Need an operand of type ACPI_TYPE_EVENT */
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type_needed = ACPI_TYPE_EVENT;
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break;
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case ARGI_PACKAGE: /* Package */
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/* Need an operand of type ACPI_TYPE_PACKAGE */
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type_needed = ACPI_TYPE_PACKAGE;
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break;
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case ARGI_ANYTYPE:
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/* Any operand type will do */
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type_needed = ACPI_TYPE_ANY;
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break;
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case ARGI_DDBHANDLE:
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/* Need an operand of type ACPI_TYPE_DDB_HANDLE */
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type_needed = ACPI_TYPE_LOCAL_REFERENCE;
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break;
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/*
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* The more complex cases allow multiple resolved object types
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*/
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case ARGI_INTEGER:
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/*
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* Need an operand of type ACPI_TYPE_INTEGER,
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* But we can implicitly convert from a STRING or BUFFER
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* Aka - "Implicit Source Operand Conversion"
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*/
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status =
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acpi_ex_convert_to_integer(obj_desc, stack_ptr, 16);
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if (ACPI_FAILURE(status)) {
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if (status == AE_TYPE) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Needed [Integer/String/Buffer], found [%s] %p\n",
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acpi_ut_get_object_type_name
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(obj_desc),
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obj_desc));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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return_ACPI_STATUS(status);
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}
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if (obj_desc != *stack_ptr) {
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acpi_ut_remove_reference(obj_desc);
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}
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goto next_operand;
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case ARGI_BUFFER:
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/*
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* Need an operand of type ACPI_TYPE_BUFFER,
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* But we can implicitly convert from a STRING or INTEGER
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* Aka - "Implicit Source Operand Conversion"
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*/
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status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
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if (ACPI_FAILURE(status)) {
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if (status == AE_TYPE) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Needed [Integer/String/Buffer], found [%s] %p\n",
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acpi_ut_get_object_type_name
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(obj_desc),
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obj_desc));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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return_ACPI_STATUS(status);
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}
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if (obj_desc != *stack_ptr) {
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acpi_ut_remove_reference(obj_desc);
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}
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goto next_operand;
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case ARGI_STRING:
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/*
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* Need an operand of type ACPI_TYPE_STRING,
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* But we can implicitly convert from a BUFFER or INTEGER
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* Aka - "Implicit Source Operand Conversion"
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*/
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status = acpi_ex_convert_to_string(obj_desc, stack_ptr,
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ACPI_IMPLICIT_CONVERT_HEX);
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if (ACPI_FAILURE(status)) {
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if (status == AE_TYPE) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Needed [Integer/String/Buffer], found [%s] %p\n",
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acpi_ut_get_object_type_name
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(obj_desc),
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obj_desc));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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return_ACPI_STATUS(status);
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}
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if (obj_desc != *stack_ptr) {
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acpi_ut_remove_reference(obj_desc);
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}
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goto next_operand;
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case ARGI_COMPUTEDATA:
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/* Need an operand of type INTEGER, STRING or BUFFER */
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switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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/* Valid operand */
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break;
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default:
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Needed [Integer/String/Buffer], found [%s] %p\n",
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acpi_ut_get_object_type_name
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(obj_desc), obj_desc));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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goto next_operand;
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case ARGI_BUFFER_OR_STRING:
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/* Need an operand of type STRING or BUFFER */
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switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
|
|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
/* Valid operand */
|
|
break;
|
|
|
|
case ACPI_TYPE_INTEGER:
|
|
|
|
/* Highest priority conversion is to type Buffer */
|
|
|
|
status =
|
|
acpi_ex_convert_to_buffer(obj_desc,
|
|
stack_ptr);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
if (obj_desc != *stack_ptr) {
|
|
acpi_ut_remove_reference(obj_desc);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Needed [Integer/String/Buffer], found [%s] %p\n",
|
|
acpi_ut_get_object_type_name
|
|
(obj_desc), obj_desc));
|
|
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto next_operand;
|
|
|
|
case ARGI_DATAOBJECT:
|
|
/*
|
|
* ARGI_DATAOBJECT is only used by the size_of operator.
|
|
* Need a buffer, string, package, or ref_of reference.
|
|
*
|
|
* The only reference allowed here is a direct reference to
|
|
* a namespace node.
|
|
*/
|
|
switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
|
|
case ACPI_TYPE_PACKAGE:
|
|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
|
|
|
/* Valid operand */
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Needed [Buffer/String/Package/Reference], found [%s] %p\n",
|
|
acpi_ut_get_object_type_name
|
|
(obj_desc), obj_desc));
|
|
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto next_operand;
|
|
|
|
case ARGI_COMPLEXOBJ:
|
|
|
|
/* Need a buffer or package or (ACPI 2.0) String */
|
|
|
|
switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
|
|
case ACPI_TYPE_PACKAGE:
|
|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
/* Valid operand */
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Needed [Buffer/String/Package], found [%s] %p\n",
|
|
acpi_ut_get_object_type_name
|
|
(obj_desc), obj_desc));
|
|
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto next_operand;
|
|
|
|
case ARGI_REGION_OR_FIELD:
|
|
|
|
/* Need an operand of type REGION or a FIELD in a region */
|
|
|
|
switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
|
|
case ACPI_TYPE_REGION:
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
|
|
|
/* Valid operand */
|
|
break;
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Needed [Region/region_field], found [%s] %p\n",
|
|
acpi_ut_get_object_type_name
|
|
(obj_desc), obj_desc));
|
|
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto next_operand;
|
|
|
|
case ARGI_DATAREFOBJ:
|
|
|
|
/* Used by the Store() operator only */
|
|
|
|
switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
|
|
case ACPI_TYPE_INTEGER:
|
|
case ACPI_TYPE_PACKAGE:
|
|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
|
case ACPI_TYPE_DDB_HANDLE:
|
|
|
|
/* Valid operand */
|
|
break;
|
|
|
|
default:
|
|
|
|
if (acpi_gbl_enable_interpreter_slack) {
|
|
/*
|
|
* Enable original behavior of Store(), allowing any and all
|
|
* objects as the source operand. The ACPI spec does not
|
|
* allow this, however.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
if (target_op == AML_DEBUG_OP) {
|
|
/* Allow store of any object to the Debug object */
|
|
|
|
break;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p\n",
|
|
acpi_ut_get_object_type_name
|
|
(obj_desc), obj_desc));
|
|
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto next_operand;
|
|
|
|
default:
|
|
|
|
/* Unknown type */
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Internal - Unknown ARGI (required operand) type %X\n",
|
|
this_arg_type));
|
|
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Make sure that the original object was resolved to the
|
|
* required object type (Simple cases only).
|
|
*/
|
|
status = acpi_ex_check_object_type(type_needed,
|
|
ACPI_GET_OBJECT_TYPE
|
|
(*stack_ptr), *stack_ptr);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
next_operand:
|
|
/*
|
|
* If more operands needed, decrement stack_ptr to point
|
|
* to next operand on stack
|
|
*/
|
|
if (GET_CURRENT_ARG_TYPE(arg_types)) {
|
|
stack_ptr--;
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|