forked from Minki/linux
88ac00f5a8
Implemented support to execute Type 1 and Type 2 AML opcodes appearing at the module level (not within a control method.) These opcodes are executed exactly once at the time the table is loaded. This type of code was legal up until the release of ACPI 2.0B (2002) and is now supported within ACPI CA in order to provide backwards compatibility with earlier BIOS implementations. This eliminates the "Encountered executable code at module level" warning that was previously generated upon detection of such code. Fixed a problem in the interpreter where an AE_NOT_FOUND exception could inadvertently be generated during the lookup of namespace objects in the second pass parse of ACPI tables and control methods. It appears that this problem could occur during the resolution of forward references to namespace objects. Added the ACPI_MUTEX_DEBUG #ifdef to the acpi_ut_release_mutex function, corresponding to the same the deadlock detection debug code to be compiled out in the normal case, improving mutex performance (and overall subsystem performance) considerably. As suggested by Alexey Starikovskiy. Implemented a handful of miscellaneous fixes for possible memory leaks on error conditions and error handling control paths. These fixes were suggested by FreeBSD and the Coverity Prevent source code analysis tool. Added a check for a null RSDT pointer in acpi_get_firmware_table (tbxfroot.c) to prevent a fault in this error case. Signed-off-by Len Brown <len.brown@intel.com>
223 lines
9.2 KiB
C
223 lines
9.2 KiB
C
/******************************************************************************
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*
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* Name: acstruct.h - Internal structs
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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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#ifndef __ACSTRUCT_H__
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#define __ACSTRUCT_H__
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/*****************************************************************************
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*
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* Tree walking typedefs and structs
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*
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****************************************************************************/
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/*
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* Walk state - current state of a parse tree walk. Used for both a leisurely stroll through
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* the tree (for whatever reason), and for control method execution.
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*/
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#define ACPI_NEXT_OP_DOWNWARD 1
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#define ACPI_NEXT_OP_UPWARD 2
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#define ACPI_WALK_NON_METHOD 0
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#define ACPI_WALK_METHOD 1
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#define ACPI_WALK_METHOD_RESTART 2
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#define ACPI_WALK_CONST_REQUIRED 3
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#define ACPI_WALK_CONST_OPTIONAL 4
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struct acpi_walk_state
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{
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u8 data_type; /* To differentiate various internal objs MUST BE FIRST!*/\
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u8 walk_type;
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acpi_owner_id owner_id; /* Owner of objects created during the walk */
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u8 last_predicate; /* Result of last predicate */
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u8 reserved; /* For alignment */
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u8 current_result; /* */
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u8 next_op_info; /* Info about next_op */
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u8 num_operands; /* Stack pointer for Operands[] array */
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u8 return_used;
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u16 opcode; /* Current AML opcode */
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u8 scope_depth;
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u8 pass_number; /* Parse pass during table load */
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u32 arg_count; /* push for fixed or var args */
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u32 aml_offset;
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u32 arg_types;
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u32 method_breakpoint; /* For single stepping */
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u32 user_breakpoint; /* User AML breakpoint */
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u32 parse_flags;
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u32 prev_arg_types;
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u8 *aml_last_while;
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struct acpi_namespace_node arguments[ACPI_METHOD_NUM_ARGS]; /* Control method arguments */
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union acpi_operand_object **caller_return_desc;
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union acpi_generic_state *control_state; /* List of control states (nested IFs) */
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struct acpi_namespace_node *deferred_node; /* Used when executing deferred opcodes */
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struct acpi_gpe_event_info *gpe_event_info; /* Info for GPE (_Lxx/_Exx methods only */
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union acpi_operand_object *implicit_return_obj;
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struct acpi_namespace_node local_variables[ACPI_METHOD_NUM_LOCALS]; /* Control method locals */
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struct acpi_namespace_node *method_call_node; /* Called method Node*/
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union acpi_parse_object *method_call_op; /* method_call Op if running a method */
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union acpi_operand_object *method_desc; /* Method descriptor if running a method */
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struct acpi_namespace_node *method_node; /* Method node if running a method. */
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union acpi_parse_object *op; /* Current parser op */
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union acpi_operand_object *operands[ACPI_OBJ_NUM_OPERANDS+1]; /* Operands passed to the interpreter (+1 for NULL terminator) */
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const struct acpi_opcode_info *op_info; /* Info on current opcode */
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union acpi_parse_object *origin; /* Start of walk [Obsolete] */
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union acpi_operand_object **params;
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struct acpi_parse_state parser_state; /* Current state of parser */
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union acpi_operand_object *result_obj;
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union acpi_generic_state *results; /* Stack of accumulated results */
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union acpi_operand_object *return_desc; /* Return object, if any */
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union acpi_generic_state *scope_info; /* Stack of nested scopes */
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union acpi_parse_object *prev_op; /* Last op that was processed */
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union acpi_parse_object *next_op; /* next op to be processed */
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acpi_parse_downwards descending_callback;
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acpi_parse_upwards ascending_callback;
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struct acpi_thread_state *thread;
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struct acpi_walk_state *next; /* Next walk_state in list */
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};
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/* Info used by acpi_ps_init_objects */
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struct acpi_init_walk_info
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{
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u16 method_count;
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u16 device_count;
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u16 op_region_count;
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u16 field_count;
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u16 buffer_count;
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u16 package_count;
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u16 op_region_init;
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u16 field_init;
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u16 buffer_init;
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u16 package_init;
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u16 object_count;
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struct acpi_table_desc *table_desc;
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};
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/* Info used by acpi_ns_initialize_devices */
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struct acpi_device_walk_info
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{
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u16 device_count;
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u16 num_STA;
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u16 num_INI;
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struct acpi_table_desc *table_desc;
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};
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/* TBD: [Restructure] Merge with struct above */
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struct acpi_walk_info
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{
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u32 debug_level;
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u32 owner_id;
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u8 display_type;
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};
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/* Display Types */
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#define ACPI_DISPLAY_SUMMARY 0
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#define ACPI_DISPLAY_OBJECTS 1
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struct acpi_get_devices_info
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{
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acpi_walk_callback user_function;
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void *context;
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char *hid;
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};
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union acpi_aml_operands
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{
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union acpi_operand_object *operands[7];
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struct
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{
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struct acpi_object_integer *type;
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struct acpi_object_integer *code;
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struct acpi_object_integer *argument;
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} fatal;
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struct
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{
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union acpi_operand_object *source;
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struct acpi_object_integer *index;
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union acpi_operand_object *target;
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} index;
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struct
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{
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union acpi_operand_object *source;
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struct acpi_object_integer *index;
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struct acpi_object_integer *length;
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union acpi_operand_object *target;
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} mid;
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};
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/* Internal method parameter list */
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struct acpi_parameter_info
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{
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struct acpi_namespace_node *node;
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union acpi_operand_object **parameters;
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union acpi_operand_object *return_object;
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u8 parameter_type;
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u8 return_object_type;
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};
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/* Types for parameter_type above */
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#define ACPI_PARAM_ARGS 0
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#define ACPI_PARAM_GPE 1
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#endif
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