73459f73e5
ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
1104 lines
30 KiB
C
1104 lines
30 KiB
C
/******************************************************************************
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*
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* Module Name: dswstate - Dispatcher parse tree walk management routines
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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/acparser.h>
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#include <acpi/acdispat.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dswstate")
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/* Local prototypes */
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#ifdef ACPI_OBSOLETE_FUNCTIONS
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acpi_status
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acpi_ds_result_insert (
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void *object,
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u32 index,
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struct acpi_walk_state *walk_state);
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acpi_status
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acpi_ds_obj_stack_delete_all (
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struct acpi_walk_state *walk_state);
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acpi_status
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acpi_ds_obj_stack_pop_object (
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union acpi_operand_object **object,
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struct acpi_walk_state *walk_state);
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void *
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acpi_ds_obj_stack_get_value (
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u32 index,
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struct acpi_walk_state *walk_state);
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#endif
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#ifdef ACPI_FUTURE_USAGE
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_remove
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*
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* PARAMETERS: Object - Where to return the popped object
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* Index - Where to extract the object
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
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* other words, this is a FIFO.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_remove (
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union acpi_operand_object **object,
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u32 index,
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_remove");
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state = walk_state->results;
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if (!state) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
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walk_state));
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return (AE_NOT_EXIST);
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}
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if (index >= ACPI_OBJ_MAX_OPERAND) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Index out of range: %X State=%p Num=%X\n",
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index, walk_state, state->results.num_results));
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}
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/* Check for a valid result object */
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if (!state->results.obj_desc [index]) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Null operand! State=%p #Ops=%X, Index=%X\n",
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walk_state, state->results.num_results, index));
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return (AE_AML_NO_RETURN_VALUE);
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}
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/* Remove the object */
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state->results.num_results--;
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*object = state->results.obj_desc [index];
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state->results.obj_desc [index] = NULL;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Obj=%p [%s] Index=%X State=%p Num=%X\n",
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*object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
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index, walk_state, state->results.num_results));
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return (AE_OK);
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}
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#endif /* ACPI_FUTURE_USAGE */
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_pop
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*
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* PARAMETERS: Object - Where to return the popped object
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
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* other words, this is a FIFO.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_pop (
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union acpi_operand_object **object,
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struct acpi_walk_state *walk_state)
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{
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acpi_native_uint index;
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_pop");
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state = walk_state->results;
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if (!state) {
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return (AE_OK);
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}
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if (!state->results.num_results) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Result stack is empty! State=%p\n",
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walk_state));
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return (AE_AML_NO_RETURN_VALUE);
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}
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/* Remove top element */
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state->results.num_results--;
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for (index = ACPI_OBJ_NUM_OPERANDS; index; index--) {
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/* Check for a valid result object */
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if (state->results.obj_desc [index -1]) {
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*object = state->results.obj_desc [index -1];
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state->results.obj_desc [index -1] = NULL;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Obj=%p [%s] Index=%X State=%p Num=%X\n",
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*object,
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(*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
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(u32) index -1, walk_state, state->results.num_results));
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return (AE_OK);
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}
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"No result objects! State=%p\n", walk_state));
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return (AE_AML_NO_RETURN_VALUE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_result_pop_from_bottom
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*
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* PARAMETERS: Object - Where to return the popped object
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
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* other words, this is a FIFO.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_pop_from_bottom (
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union acpi_operand_object **object,
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struct acpi_walk_state *walk_state)
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{
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acpi_native_uint index;
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_pop_from_bottom");
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state = walk_state->results;
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if (!state) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Warning: No result object pushed! State=%p\n", walk_state));
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return (AE_NOT_EXIST);
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}
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if (!state->results.num_results) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result objects! State=%p\n",
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walk_state));
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return (AE_AML_NO_RETURN_VALUE);
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}
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/* Remove Bottom element */
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*object = state->results.obj_desc [0];
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/* Push entire stack down one element */
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for (index = 0; index < state->results.num_results; index++) {
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state->results.obj_desc [index] = state->results.obj_desc [index + 1];
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}
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state->results.num_results--;
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/* Check for a valid result object */
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if (!*object) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Null operand! State=%p #Ops=%X Index=%X\n",
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walk_state, state->results.num_results, (u32) index));
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return (AE_AML_NO_RETURN_VALUE);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] Results=%p State=%p\n",
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*object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
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state, walk_state));
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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_ds_result_push
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*
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* PARAMETERS: Object - Where to return the popped object
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push an object onto the current result stack
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_push (
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union acpi_operand_object *object,
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_push");
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state = walk_state->results;
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if (!state) {
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ACPI_REPORT_ERROR (("No result stack frame during push\n"));
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return (AE_AML_INTERNAL);
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}
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if (state->results.num_results == ACPI_OBJ_NUM_OPERANDS) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Result stack overflow: Obj=%p State=%p Num=%X\n",
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object, walk_state, state->results.num_results));
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return (AE_STACK_OVERFLOW);
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}
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if (!object) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Null Object! Obj=%p State=%p Num=%X\n",
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object, walk_state, state->results.num_results));
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return (AE_BAD_PARAMETER);
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}
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state->results.obj_desc [state->results.num_results] = object;
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state->results.num_results++;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p Num=%X Cur=%X\n",
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object, object ? acpi_ut_get_object_type_name ((union acpi_operand_object *) object) : "NULL",
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walk_state, state->results.num_results, walk_state->current_result));
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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_ds_result_stack_push
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*
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* PARAMETERS: walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push an object onto the walk_state result stack.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_stack_push (
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_stack_push");
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state = acpi_ut_create_generic_state ();
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if (!state) {
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return (AE_NO_MEMORY);
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}
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state->common.data_type = ACPI_DESC_TYPE_STATE_RESULT;
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acpi_ut_push_generic_state (&walk_state->results, state);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Results=%p State=%p\n",
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state, walk_state));
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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_ds_result_stack_pop
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*
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* PARAMETERS: walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop an object off of the walk_state result stack.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_result_stack_pop (
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struct acpi_walk_state *walk_state)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_NAME ("ds_result_stack_pop");
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/* Check for stack underflow */
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if (walk_state->results == NULL) {
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Underflow - State=%p\n",
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walk_state));
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return (AE_AML_NO_OPERAND);
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}
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state = acpi_ut_pop_generic_state (&walk_state->results);
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"Result=%p remaining_results=%X State=%p\n",
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state, state->results.num_results, walk_state));
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acpi_ut_delete_generic_state (state);
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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_ds_obj_stack_push
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*
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* PARAMETERS: Object - Object to push
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Push an object onto this walk's object/operand stack
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*
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******************************************************************************/
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acpi_status
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acpi_ds_obj_stack_push (
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void *object,
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struct acpi_walk_state *walk_state)
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{
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ACPI_FUNCTION_NAME ("ds_obj_stack_push");
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/* Check for stack overflow */
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if (walk_state->num_operands >= ACPI_OBJ_NUM_OPERANDS) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"overflow! Obj=%p State=%p #Ops=%X\n",
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object, walk_state, walk_state->num_operands));
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return (AE_STACK_OVERFLOW);
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}
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/* Put the object onto the stack */
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walk_state->operands [walk_state->num_operands] = object;
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walk_state->num_operands++;
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
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object, acpi_ut_get_object_type_name ((union acpi_operand_object *) object),
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walk_state, walk_state->num_operands));
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return (AE_OK);
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}
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|
|
|
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_obj_stack_pop
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*
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* PARAMETERS: pop_count - Number of objects/entries to pop
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* walk_state - Current Walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
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* deleted by this routine.
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*
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******************************************************************************/
|
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|
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acpi_status
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acpi_ds_obj_stack_pop (
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u32 pop_count,
|
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struct acpi_walk_state *walk_state)
|
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{
|
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u32 i;
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ACPI_FUNCTION_NAME ("ds_obj_stack_pop");
|
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|
|
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for (i = 0; i < pop_count; i++) {
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/* Check for stack underflow */
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|
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if (walk_state->num_operands == 0) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
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"Underflow! Count=%X State=%p #Ops=%X\n",
|
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pop_count, walk_state, walk_state->num_operands));
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return (AE_STACK_UNDERFLOW);
|
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}
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|
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/* Just set the stack entry to null */
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|
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walk_state->num_operands--;
|
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walk_state->operands [walk_state->num_operands] = NULL;
|
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
|
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pop_count, walk_state, walk_state->num_operands));
|
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|
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return (AE_OK);
|
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}
|
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|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_obj_stack_pop_and_delete
|
|
*
|
|
* PARAMETERS: pop_count - Number of objects/entries to pop
|
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* walk_state - Current Walk state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Pop this walk's object stack and delete each object that is
|
|
* popped off.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ds_obj_stack_pop_and_delete (
|
|
u32 pop_count,
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
u32 i;
|
|
union acpi_operand_object *obj_desc;
|
|
|
|
|
|
ACPI_FUNCTION_NAME ("ds_obj_stack_pop_and_delete");
|
|
|
|
|
|
for (i = 0; i < pop_count; i++) {
|
|
/* Check for stack underflow */
|
|
|
|
if (walk_state->num_operands == 0) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Underflow! Count=%X State=%p #Ops=%X\n",
|
|
pop_count, walk_state, walk_state->num_operands));
|
|
return (AE_STACK_UNDERFLOW);
|
|
}
|
|
|
|
/* Pop the stack and delete an object if present in this stack entry */
|
|
|
|
walk_state->num_operands--;
|
|
obj_desc = walk_state->operands [walk_state->num_operands];
|
|
if (obj_desc) {
|
|
acpi_ut_remove_reference (walk_state->operands [walk_state->num_operands]);
|
|
walk_state->operands [walk_state->num_operands] = NULL;
|
|
}
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
|
|
pop_count, walk_state, walk_state->num_operands));
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_get_current_walk_state
|
|
*
|
|
* PARAMETERS: Thread - Get current active state for this Thread
|
|
*
|
|
* RETURN: Pointer to the current walk state
|
|
*
|
|
* DESCRIPTION: Get the walk state that is at the head of the list (the "current"
|
|
* walk state.)
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_walk_state *
|
|
acpi_ds_get_current_walk_state (
|
|
struct acpi_thread_state *thread)
|
|
|
|
{
|
|
ACPI_FUNCTION_NAME ("ds_get_current_walk_state");
|
|
|
|
|
|
if (!thread) {
|
|
return (NULL);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Current walk_state %p\n",
|
|
thread->walk_state_list));
|
|
|
|
return (thread->walk_state_list);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_push_walk_state
|
|
*
|
|
* PARAMETERS: walk_state - State to push
|
|
* Thread - Thread state object
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Place the Thread state at the head of the state list.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ds_push_walk_state (
|
|
struct acpi_walk_state *walk_state,
|
|
struct acpi_thread_state *thread)
|
|
{
|
|
ACPI_FUNCTION_TRACE ("ds_push_walk_state");
|
|
|
|
|
|
walk_state->next = thread->walk_state_list;
|
|
thread->walk_state_list = walk_state;
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_pop_walk_state
|
|
*
|
|
* PARAMETERS: Thread - Current thread state
|
|
*
|
|
* RETURN: A walk_state object popped from the thread's stack
|
|
*
|
|
* DESCRIPTION: Remove and return the walkstate object that is at the head of
|
|
* the walk stack for the given walk list. NULL indicates that
|
|
* the list is empty.
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_walk_state *
|
|
acpi_ds_pop_walk_state (
|
|
struct acpi_thread_state *thread)
|
|
{
|
|
struct acpi_walk_state *walk_state;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ds_pop_walk_state");
|
|
|
|
|
|
walk_state = thread->walk_state_list;
|
|
|
|
if (walk_state) {
|
|
/* Next walk state becomes the current walk state */
|
|
|
|
thread->walk_state_list = walk_state->next;
|
|
|
|
/*
|
|
* Don't clear the NEXT field, this serves as an indicator
|
|
* that there is a parent WALK STATE
|
|
* Do Not: walk_state->Next = NULL;
|
|
*/
|
|
}
|
|
|
|
return_PTR (walk_state);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_create_walk_state
|
|
*
|
|
* PARAMETERS: owner_id - ID for object creation
|
|
* Origin - Starting point for this walk
|
|
* mth_desc - Method object
|
|
* Thread - Current thread state
|
|
*
|
|
* RETURN: Pointer to the new walk state.
|
|
*
|
|
* DESCRIPTION: Allocate and initialize a new walk state. The current walk
|
|
* state is set to this new state.
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_walk_state *
|
|
acpi_ds_create_walk_state (
|
|
acpi_owner_id owner_id,
|
|
union acpi_parse_object *origin,
|
|
union acpi_operand_object *mth_desc,
|
|
struct acpi_thread_state *thread)
|
|
{
|
|
struct acpi_walk_state *walk_state;
|
|
acpi_status status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ds_create_walk_state");
|
|
|
|
|
|
walk_state = ACPI_MEM_CALLOCATE (sizeof (struct acpi_walk_state));
|
|
if (!walk_state) {
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
walk_state->data_type = ACPI_DESC_TYPE_WALK;
|
|
walk_state->owner_id = owner_id;
|
|
walk_state->origin = origin;
|
|
walk_state->method_desc = mth_desc;
|
|
walk_state->thread = thread;
|
|
|
|
walk_state->parser_state.start_op = origin;
|
|
|
|
/* Init the method args/local */
|
|
|
|
#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
|
|
acpi_ds_method_data_init (walk_state);
|
|
#endif
|
|
|
|
/* Create an initial result stack entry */
|
|
|
|
status = acpi_ds_result_stack_push (walk_state);
|
|
if (ACPI_FAILURE (status)) {
|
|
ACPI_MEM_FREE (walk_state);
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
/* Put the new state at the head of the walk list */
|
|
|
|
if (thread) {
|
|
acpi_ds_push_walk_state (walk_state, thread);
|
|
}
|
|
|
|
return_PTR (walk_state);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_init_aml_walk
|
|
*
|
|
* PARAMETERS: walk_state - New state to be initialized
|
|
* Op - Current parse op
|
|
* method_node - Control method NS node, if any
|
|
* aml_start - Start of AML
|
|
* aml_length - Length of AML
|
|
* Info - Method info block (params, etc.)
|
|
* pass_number - 1, 2, or 3
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Initialize a walk state for a pass 1 or 2 parse tree walk
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ds_init_aml_walk (
|
|
struct acpi_walk_state *walk_state,
|
|
union acpi_parse_object *op,
|
|
struct acpi_namespace_node *method_node,
|
|
u8 *aml_start,
|
|
u32 aml_length,
|
|
struct acpi_parameter_info *info,
|
|
u32 pass_number)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_parse_state *parser_state = &walk_state->parser_state;
|
|
union acpi_parse_object *extra_op;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ds_init_aml_walk");
|
|
|
|
|
|
walk_state->parser_state.aml =
|
|
walk_state->parser_state.aml_start = aml_start;
|
|
walk_state->parser_state.aml_end =
|
|
walk_state->parser_state.pkg_end = aml_start + aml_length;
|
|
|
|
/* The next_op of the next_walk will be the beginning of the method */
|
|
|
|
walk_state->next_op = NULL;
|
|
walk_state->pass_number = (u8) pass_number;
|
|
|
|
if (info) {
|
|
if (info->parameter_type == ACPI_PARAM_GPE) {
|
|
walk_state->gpe_event_info = ACPI_CAST_PTR (struct acpi_gpe_event_info,
|
|
info->parameters);
|
|
}
|
|
else {
|
|
walk_state->params = info->parameters;
|
|
walk_state->caller_return_desc = &info->return_object;
|
|
}
|
|
}
|
|
|
|
status = acpi_ps_init_scope (&walk_state->parser_state, op);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
if (method_node) {
|
|
walk_state->parser_state.start_node = method_node;
|
|
walk_state->walk_type = ACPI_WALK_METHOD;
|
|
walk_state->method_node = method_node;
|
|
walk_state->method_desc = acpi_ns_get_attached_object (method_node);
|
|
|
|
/* Push start scope on scope stack and make it current */
|
|
|
|
status = acpi_ds_scope_stack_push (method_node, ACPI_TYPE_METHOD, walk_state);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Init the method arguments */
|
|
|
|
status = acpi_ds_method_data_init_args (walk_state->params,
|
|
ACPI_METHOD_NUM_ARGS, walk_state);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* Setup the current scope.
|
|
* Find a Named Op that has a namespace node associated with it.
|
|
* search upwards from this Op. Current scope is the first
|
|
* Op with a namespace node.
|
|
*/
|
|
extra_op = parser_state->start_op;
|
|
while (extra_op && !extra_op->common.node) {
|
|
extra_op = extra_op->common.parent;
|
|
}
|
|
|
|
if (!extra_op) {
|
|
parser_state->start_node = NULL;
|
|
}
|
|
else {
|
|
parser_state->start_node = extra_op->common.node;
|
|
}
|
|
|
|
if (parser_state->start_node) {
|
|
/* Push start scope on scope stack and make it current */
|
|
|
|
status = acpi_ds_scope_stack_push (parser_state->start_node,
|
|
parser_state->start_node->type, walk_state);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
}
|
|
|
|
status = acpi_ds_init_callbacks (walk_state, pass_number);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_delete_walk_state
|
|
*
|
|
* PARAMETERS: walk_state - State to delete
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Delete a walk state including all internal data structures
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ds_delete_walk_state (
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ds_delete_walk_state", walk_state);
|
|
|
|
|
|
if (!walk_state) {
|
|
return;
|
|
}
|
|
|
|
if (walk_state->data_type != ACPI_DESC_TYPE_WALK) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p is not a valid walk state\n",
|
|
walk_state));
|
|
return;
|
|
}
|
|
|
|
if (walk_state->parser_state.scope) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p walk still has a scope list\n",
|
|
walk_state));
|
|
}
|
|
|
|
/* Always must free any linked control states */
|
|
|
|
while (walk_state->control_state) {
|
|
state = walk_state->control_state;
|
|
walk_state->control_state = state->common.next;
|
|
|
|
acpi_ut_delete_generic_state (state);
|
|
}
|
|
|
|
/* Always must free any linked parse states */
|
|
|
|
while (walk_state->scope_info) {
|
|
state = walk_state->scope_info;
|
|
walk_state->scope_info = state->common.next;
|
|
|
|
acpi_ut_delete_generic_state (state);
|
|
}
|
|
|
|
/* Always must free any stacked result states */
|
|
|
|
while (walk_state->results) {
|
|
state = walk_state->results;
|
|
walk_state->results = state->common.next;
|
|
|
|
acpi_ut_delete_generic_state (state);
|
|
}
|
|
|
|
ACPI_MEM_FREE (walk_state);
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
#ifdef ACPI_OBSOLETE_FUNCTIONS
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_result_insert
|
|
*
|
|
* PARAMETERS: Object - Object to push
|
|
* Index - Where to insert the object
|
|
* walk_state - Current Walk state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Insert an object onto this walk's result stack
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ds_result_insert (
|
|
void *object,
|
|
u32 index,
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
union acpi_generic_state *state;
|
|
|
|
|
|
ACPI_FUNCTION_NAME ("ds_result_insert");
|
|
|
|
|
|
state = walk_state->results;
|
|
if (!state) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
|
|
walk_state));
|
|
return (AE_NOT_EXIST);
|
|
}
|
|
|
|
if (index >= ACPI_OBJ_NUM_OPERANDS) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Index out of range: %X Obj=%p State=%p Num=%X\n",
|
|
index, object, walk_state, state->results.num_results));
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
if (!object) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Null Object! Index=%X Obj=%p State=%p Num=%X\n",
|
|
index, object, walk_state, state->results.num_results));
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
state->results.obj_desc [index] = object;
|
|
state->results.num_results++;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
|
|
"Obj=%p [%s] State=%p Num=%X Cur=%X\n",
|
|
object, object ? acpi_ut_get_object_type_name ((union acpi_operand_object *) object) : "NULL",
|
|
walk_state, state->results.num_results, walk_state->current_result));
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_obj_stack_delete_all
|
|
*
|
|
* PARAMETERS: walk_state - Current Walk state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear the object stack by deleting all objects that are on it.
|
|
* Should be used with great care, if at all!
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ds_obj_stack_delete_all (
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
u32 i;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ds_obj_stack_delete_all", walk_state);
|
|
|
|
|
|
/* The stack size is configurable, but fixed */
|
|
|
|
for (i = 0; i < ACPI_OBJ_NUM_OPERANDS; i++) {
|
|
if (walk_state->operands[i]) {
|
|
acpi_ut_remove_reference (walk_state->operands[i]);
|
|
walk_state->operands[i] = NULL;
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_obj_stack_pop_object
|
|
*
|
|
* PARAMETERS: Object - Where to return the popped object
|
|
* walk_state - Current Walk state
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
|
|
* deleted by this routine.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ds_obj_stack_pop_object (
|
|
union acpi_operand_object **object,
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
ACPI_FUNCTION_NAME ("ds_obj_stack_pop_object");
|
|
|
|
|
|
/* Check for stack underflow */
|
|
|
|
if (walk_state->num_operands == 0) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Missing operand/stack empty! State=%p #Ops=%X\n",
|
|
walk_state, walk_state->num_operands));
|
|
*object = NULL;
|
|
return (AE_AML_NO_OPERAND);
|
|
}
|
|
|
|
/* Pop the stack */
|
|
|
|
walk_state->num_operands--;
|
|
|
|
/* Check for a valid operand */
|
|
|
|
if (!walk_state->operands [walk_state->num_operands]) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Null operand! State=%p #Ops=%X\n",
|
|
walk_state, walk_state->num_operands));
|
|
*object = NULL;
|
|
return (AE_AML_NO_OPERAND);
|
|
}
|
|
|
|
/* Get operand and set stack entry to null */
|
|
|
|
*object = walk_state->operands [walk_state->num_operands];
|
|
walk_state->operands [walk_state->num_operands] = NULL;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
|
|
*object, acpi_ut_get_object_type_name (*object),
|
|
walk_state, walk_state->num_operands));
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ds_obj_stack_get_value
|
|
*
|
|
* PARAMETERS: Index - Stack index whose value is desired. Based
|
|
* on the top of the stack (index=0 == top)
|
|
* walk_state - Current Walk state
|
|
*
|
|
* RETURN: Pointer to the requested operand
|
|
*
|
|
* DESCRIPTION: Retrieve an object from this walk's operand stack. Index must
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* be within the range of the current stack pointer.
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|
*
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|
******************************************************************************/
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|
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|
void *
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|
acpi_ds_obj_stack_get_value (
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|
u32 index,
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ds_obj_stack_get_value", walk_state);
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|
|
|
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|
/* Can't do it if the stack is empty */
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|
|
|
if (walk_state->num_operands == 0) {
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|
return_PTR (NULL);
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|
}
|
|
|
|
/* or if the index is past the top of the stack */
|
|
|
|
if (index > (walk_state->num_operands - (u32) 1)) {
|
|
return_PTR (NULL);
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|
}
|
|
|
|
return_PTR (walk_state->operands[(acpi_native_uint)(walk_state->num_operands - 1) -
|
|
index]);
|
|
}
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|
#endif
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|
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|