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105 lines
2.4 KiB
105 lines
2.4 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/****************************************************************************** |
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* |
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* Module Name: pswalk - Parser routines to walk parsed op tree(s) |
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* |
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* Copyright (C) 2000 - 2021, 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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#define _COMPONENT ACPI_PARSER |
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ACPI_MODULE_NAME("pswalk") |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ps_delete_parse_tree |
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* |
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* PARAMETERS: subtree_root - Root of tree (or subtree) to delete |
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* |
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* RETURN: None |
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* |
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* DESCRIPTION: Delete a portion of or an entire parse tree. |
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* |
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******************************************************************************/ |
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#include "amlcode.h" |
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void acpi_ps_delete_parse_tree(union acpi_parse_object *subtree_root) |
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{ |
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union acpi_parse_object *op = subtree_root; |
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union acpi_parse_object *next = NULL; |
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union acpi_parse_object *parent = NULL; |
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u32 level = 0; |
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ACPI_FUNCTION_TRACE_PTR(ps_delete_parse_tree, subtree_root); |
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ACPI_DEBUG_PRINT((ACPI_DB_PARSE_TREES, " root %p\n", subtree_root)); |
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/* Visit all nodes in the subtree */ |
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while (op) { |
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if (op != parent) { |
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/* This is the descending case */ |
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if (ACPI_IS_DEBUG_ENABLED |
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(ACPI_LV_PARSE_TREES, _COMPONENT)) { |
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/* This debug option will print the entire parse tree */ |
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acpi_os_printf(" %*.s%s %p", (level * 4), |
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" ", |
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acpi_ps_get_opcode_name(op-> |
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common. |
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aml_opcode), |
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op); |
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if (op->named.aml_opcode == AML_INT_NAMEPATH_OP) { |
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acpi_os_printf(" %4.4s", |
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op->common.value.string); |
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} |
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if (op->named.aml_opcode == AML_STRING_OP) { |
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acpi_os_printf(" %s", |
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op->common.value.string); |
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} |
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acpi_os_printf("\n"); |
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} |
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/* Look for an argument or child of the current op */ |
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next = acpi_ps_get_arg(op, 0); |
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if (next) { |
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/* Still going downward in tree (Op is not completed yet) */ |
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op = next; |
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level++; |
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continue; |
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} |
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} |
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/* No more children, this Op is complete. */ |
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next = op->common.next; |
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parent = op->common.parent; |
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acpi_ps_free_op(op); |
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/* If we are back to the starting point, the walk is complete. */ |
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if (op == subtree_root) { |
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return_VOID; |
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} |
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if (next) { |
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op = next; |
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} else { |
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level--; |
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op = parent; |
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} |
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} |
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return_VOID; |
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}
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