336 lines
9.1 KiB
C
336 lines
9.1 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: psxface - Parser external interfaces
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*
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* Copyright (C) 2000 - 2018, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acparser.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "actables.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME("psxface")
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/* Local Prototypes */
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static void
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acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
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/*******************************************************************************
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*
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* FUNCTION: acpi_debug_trace
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*
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* PARAMETERS: method_name - Valid ACPI name string
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* debug_level - Optional level mask. 0 to use default
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* debug_layer - Optional layer mask. 0 to use default
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* flags - bit 1: one shot(1) or persistent(0)
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*
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* RETURN: Status
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*
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* DESCRIPTION: External interface to enable debug tracing during control
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* method execution
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*
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******************************************************************************/
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acpi_status
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acpi_debug_trace(const char *name, u32 debug_level, u32 debug_layer, u32 flags)
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{
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acpi_status status;
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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acpi_gbl_trace_method_name = name;
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acpi_gbl_trace_flags = flags;
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acpi_gbl_trace_dbg_level = debug_level;
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acpi_gbl_trace_dbg_layer = debug_layer;
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status = AE_OK;
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_execute_method
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*
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* PARAMETERS: info - Method info block, contains:
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* node - Method Node to execute
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* obj_desc - Method object
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* parameters - List of parameters to pass to the method,
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* terminated by NULL. Params itself may be
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* NULL if no parameters are being passed.
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* parameter_type - Type of Parameter list
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* return_object - Where to put method's return value (if
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* any). If NULL, no value is returned.
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* pass_number - Parse or execute pass
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a control method
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*
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******************************************************************************/
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acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
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{
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acpi_status status;
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union acpi_parse_object *op;
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struct acpi_walk_state *walk_state;
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ACPI_FUNCTION_TRACE(ps_execute_method);
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/* Quick validation of DSDT header */
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acpi_tb_check_dsdt_header();
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/* Validate the Info and method Node */
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if (!info || !info->node) {
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return_ACPI_STATUS(AE_NULL_ENTRY);
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}
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/* Init for new method, wait on concurrency semaphore */
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status =
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acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* The caller "owns" the parameters, so give each one an extra reference
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*/
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acpi_ps_update_parameter_list(info, REF_INCREMENT);
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/*
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* Execute the method. Performs parse simultaneously
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
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"**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
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info->node->name.ascii, info->node, info->obj_desc));
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/* Create and init a Root Node */
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op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start);
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if (!op) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Create and initialize a new walk state */
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info->pass_number = ACPI_IMODE_EXECUTE;
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walk_state =
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acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
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NULL, NULL);
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if (!walk_state) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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status = acpi_ds_init_aml_walk(walk_state, op, info->node,
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info->obj_desc->method.aml_start,
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info->obj_desc->method.aml_length, info,
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info->pass_number);
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if (ACPI_FAILURE(status)) {
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acpi_ds_delete_walk_state(walk_state);
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goto cleanup;
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}
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if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
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walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
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}
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/* Invoke an internal method if necessary */
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if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) {
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status =
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info->obj_desc->method.dispatch.implementation(walk_state);
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info->return_object = walk_state->return_desc;
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/* Cleanup states */
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acpi_ds_scope_stack_clear(walk_state);
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acpi_ps_cleanup_scope(&walk_state->parser_state);
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acpi_ds_terminate_control_method(walk_state->method_desc,
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walk_state);
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acpi_ds_delete_walk_state(walk_state);
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goto cleanup;
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}
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/*
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* Start method evaluation with an implicit return of zero.
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* This is done for Windows compatibility.
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*/
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if (acpi_gbl_enable_interpreter_slack) {
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walk_state->implicit_return_obj =
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acpi_ut_create_integer_object((u64) 0);
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if (!walk_state->implicit_return_obj) {
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status = AE_NO_MEMORY;
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acpi_ds_delete_walk_state(walk_state);
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goto cleanup;
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}
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}
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/* Parse the AML */
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status = acpi_ps_parse_aml(walk_state);
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/* walk_state was deleted by parse_aml */
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cleanup:
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acpi_ps_delete_parse_tree(op);
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/* Take away the extra reference that we gave the parameters above */
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acpi_ps_update_parameter_list(info, REF_DECREMENT);
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/* Exit now if error above */
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* If the method has returned an object, signal this to the caller with
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* a control exception code
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*/
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if (info->return_object) {
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ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
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info->return_object));
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ACPI_DUMP_STACK_ENTRY(info->return_object);
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status = AE_CTRL_RETURN_VALUE;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_execute_table
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*
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* PARAMETERS: info - Method info block, contains:
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* node - Node to where the is entered into the
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* namespace
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* obj_desc - Pseudo method object describing the AML
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* code of the entire table
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* pass_number - Parse or execute pass
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a table
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*
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******************************************************************************/
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acpi_status acpi_ps_execute_table(struct acpi_evaluate_info *info)
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{
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acpi_status status;
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union acpi_parse_object *op = NULL;
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struct acpi_walk_state *walk_state = NULL;
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ACPI_FUNCTION_TRACE(ps_execute_table);
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/* Create and init a Root Node */
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op = acpi_ps_create_scope_op(info->obj_desc->method.aml_start);
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if (!op) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Create and initialize a new walk state */
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walk_state =
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acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
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NULL, NULL);
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if (!walk_state) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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status = acpi_ds_init_aml_walk(walk_state, op, info->node,
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info->obj_desc->method.aml_start,
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info->obj_desc->method.aml_length, info,
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info->pass_number);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
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walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
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}
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/* Info->Node is the default location to load the table */
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if (info->node && info->node != acpi_gbl_root_node) {
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status =
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acpi_ds_scope_stack_push(info->node, ACPI_TYPE_METHOD,
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walk_state);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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}
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/*
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* Parse the AML, walk_state will be deleted by parse_aml
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*/
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acpi_ex_enter_interpreter();
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status = acpi_ps_parse_aml(walk_state);
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acpi_ex_exit_interpreter();
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walk_state = NULL;
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cleanup:
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if (walk_state) {
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acpi_ds_delete_walk_state(walk_state);
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}
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if (op) {
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acpi_ps_delete_parse_tree(op);
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_update_parameter_list
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*
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* PARAMETERS: info - See struct acpi_evaluate_info
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* (Used: parameter_type and Parameters)
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* action - Add or Remove reference
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*
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* RETURN: Status
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*
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* DESCRIPTION: Update reference count on all method parameter objects
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*
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******************************************************************************/
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static void
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acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
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{
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u32 i;
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if (info->parameters) {
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/* Update reference count for each parameter */
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for (i = 0; info->parameters[i]; i++) {
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/* Ignore errors, just do them all */
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(void)acpi_ut_update_object_reference(info->
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parameters[i],
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action);
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}
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}
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}
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