b229cf92ee
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>
265 lines
8.1 KiB
C
265 lines
8.1 KiB
C
/******************************************************************************
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*
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* Module Name: psscope - Parser scope stack management routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2006, 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/acparser.h>
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME("psscope")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_get_parent_scope
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*
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* PARAMETERS: parser_state - Current parser state object
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*
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* RETURN: Pointer to an Op object
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*
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* DESCRIPTION: Get parent of current op being parsed
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*
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******************************************************************************/
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union acpi_parse_object *acpi_ps_get_parent_scope(struct acpi_parse_state
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*parser_state)
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{
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return (parser_state->scope->parse_scope.op);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_has_completed_scope
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*
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* PARAMETERS: parser_state - Current parser state object
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*
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* RETURN: Boolean, TRUE = scope completed.
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*
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* DESCRIPTION: Is parsing of current argument complete? Determined by
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* 1) AML pointer is at or beyond the end of the scope
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* 2) The scope argument count has reached zero.
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*
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******************************************************************************/
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u8 acpi_ps_has_completed_scope(struct acpi_parse_state * parser_state)
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{
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return ((u8)
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((parser_state->aml >= parser_state->scope->parse_scope.arg_end
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|| !parser_state->scope->parse_scope.arg_count)));
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_init_scope
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*
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* PARAMETERS: parser_state - Current parser state object
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* Root - the Root Node of this new scope
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*
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* RETURN: Status
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*
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* DESCRIPTION: Allocate and init a new scope object
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*
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******************************************************************************/
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acpi_status
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acpi_ps_init_scope(struct acpi_parse_state * parser_state,
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union acpi_parse_object * root_op)
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{
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union acpi_generic_state *scope;
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ACPI_FUNCTION_TRACE_PTR(ps_init_scope, root_op);
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scope = acpi_ut_create_generic_state();
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if (!scope) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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scope->common.descriptor_type = ACPI_DESC_TYPE_STATE_RPSCOPE;
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scope->parse_scope.op = root_op;
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scope->parse_scope.arg_count = ACPI_VAR_ARGS;
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scope->parse_scope.arg_end = parser_state->aml_end;
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scope->parse_scope.pkg_end = parser_state->aml_end;
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parser_state->scope = scope;
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parser_state->start_op = root_op;
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_push_scope
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*
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* PARAMETERS: parser_state - Current parser state object
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* Op - Current op to be pushed
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* remaining_args - List of args remaining
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* arg_count - Fixed or variable number of args
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push current op to begin parsing its argument
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*
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******************************************************************************/
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acpi_status
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acpi_ps_push_scope(struct acpi_parse_state *parser_state,
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union acpi_parse_object *op,
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u32 remaining_args, u32 arg_count)
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{
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union acpi_generic_state *scope;
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ACPI_FUNCTION_TRACE_PTR(ps_push_scope, op);
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scope = acpi_ut_create_generic_state();
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if (!scope) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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scope->common.descriptor_type = ACPI_DESC_TYPE_STATE_PSCOPE;
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scope->parse_scope.op = op;
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scope->parse_scope.arg_list = remaining_args;
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scope->parse_scope.arg_count = arg_count;
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scope->parse_scope.pkg_end = parser_state->pkg_end;
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/* Push onto scope stack */
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acpi_ut_push_generic_state(&parser_state->scope, scope);
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if (arg_count == ACPI_VAR_ARGS) {
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/* Multiple arguments */
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scope->parse_scope.arg_end = parser_state->pkg_end;
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} else {
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/* Single argument */
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scope->parse_scope.arg_end = ACPI_TO_POINTER(ACPI_MAX_PTR);
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}
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_pop_scope
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*
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* PARAMETERS: parser_state - Current parser state object
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* Op - Where the popped op is returned
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* arg_list - Where the popped "next argument" is
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* returned
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* arg_count - Count of objects in arg_list
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return to parsing a previous op
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*
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******************************************************************************/
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void
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acpi_ps_pop_scope(struct acpi_parse_state *parser_state,
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union acpi_parse_object **op, u32 * arg_list, u32 * arg_count)
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{
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union acpi_generic_state *scope = parser_state->scope;
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ACPI_FUNCTION_TRACE(ps_pop_scope);
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/* Only pop the scope if there is in fact a next scope */
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if (scope->common.next) {
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scope = acpi_ut_pop_generic_state(&parser_state->scope);
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/* Return to parsing previous op */
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*op = scope->parse_scope.op;
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*arg_list = scope->parse_scope.arg_list;
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*arg_count = scope->parse_scope.arg_count;
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parser_state->pkg_end = scope->parse_scope.pkg_end;
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/* All done with this scope state structure */
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acpi_ut_delete_generic_state(scope);
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} else {
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/* Empty parse stack, prepare to fetch next opcode */
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*op = NULL;
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*arg_list = 0;
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*arg_count = 0;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
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"Popped Op %p Args %X\n", *op, *arg_count));
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_cleanup_scope
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*
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* PARAMETERS: parser_state - Current parser state object
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*
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* RETURN: None
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*
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* DESCRIPTION: Destroy available list, remaining stack levels, and return
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* root scope
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*
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******************************************************************************/
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void acpi_ps_cleanup_scope(struct acpi_parse_state *parser_state)
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{
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union acpi_generic_state *scope;
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ACPI_FUNCTION_TRACE_PTR(ps_cleanup_scope, parser_state);
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if (!parser_state) {
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return_VOID;
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}
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/* Delete anything on the scope stack */
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while (parser_state->scope) {
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scope = acpi_ut_pop_generic_state(&parser_state->scope);
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acpi_ut_delete_generic_state(scope);
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}
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return_VOID;
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}
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