603 lines
16 KiB
C
603 lines
16 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: dswload - Dispatcher first pass namespace load callbacks
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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 "amlcode.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#ifdef ACPI_ASL_COMPILER
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#include "acdisasm.h"
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#endif
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME("dswload")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_init_callbacks
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*
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* PARAMETERS: walk_state - Current state of the parse tree walk
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* pass_number - 1, 2, or 3
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*
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* RETURN: Status
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*
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* DESCRIPTION: Init walk state callbacks
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*
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******************************************************************************/
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acpi_status
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acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
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{
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switch (pass_number) {
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case 0:
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/* Parse only - caller will setup callbacks */
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walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
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ACPI_PARSE_DELETE_TREE | ACPI_PARSE_DISASSEMBLE;
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walk_state->descending_callback = NULL;
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walk_state->ascending_callback = NULL;
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break;
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case 1:
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/* Load pass 1 */
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walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
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ACPI_PARSE_DELETE_TREE;
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walk_state->descending_callback = acpi_ds_load1_begin_op;
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walk_state->ascending_callback = acpi_ds_load1_end_op;
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break;
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case 2:
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/* Load pass 2 */
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walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
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ACPI_PARSE_DELETE_TREE;
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walk_state->descending_callback = acpi_ds_load2_begin_op;
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walk_state->ascending_callback = acpi_ds_load2_end_op;
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break;
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case 3:
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/* Execution pass */
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#ifndef ACPI_NO_METHOD_EXECUTION
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walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
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ACPI_PARSE_DELETE_TREE;
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walk_state->descending_callback = acpi_ds_exec_begin_op;
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walk_state->ascending_callback = acpi_ds_exec_end_op;
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#endif
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break;
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default:
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return (AE_BAD_PARAMETER);
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}
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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_load1_begin_op
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*
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* PARAMETERS: walk_state - Current state of the parse tree walk
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* out_op - Where to return op if a new one is created
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*
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* RETURN: Status
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*
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* DESCRIPTION: Descending callback used during the loading of ACPI tables.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_load1_begin_op(struct acpi_walk_state *walk_state,
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union acpi_parse_object **out_op)
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{
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union acpi_parse_object *op;
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struct acpi_namespace_node *node;
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acpi_status status;
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acpi_object_type object_type;
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char *path;
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u32 flags;
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ACPI_FUNCTION_TRACE_PTR(ds_load1_begin_op, walk_state->op);
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op = walk_state->op;
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
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walk_state));
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/* We are only interested in opcodes that have an associated name */
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if (op) {
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if (!(walk_state->op_info->flags & AML_NAMED)) {
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*out_op = op;
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return_ACPI_STATUS(AE_OK);
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}
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/* Check if this object has already been installed in the namespace */
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if (op->common.node) {
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*out_op = op;
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return_ACPI_STATUS(AE_OK);
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}
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}
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path = acpi_ps_get_next_namestring(&walk_state->parser_state);
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/* Map the raw opcode into an internal object type */
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object_type = walk_state->op_info->object_type;
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"State=%p Op=%p [%s]\n", walk_state, op,
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acpi_ut_get_type_name(object_type)));
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switch (walk_state->opcode) {
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case AML_SCOPE_OP:
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/*
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* The target name of the Scope() operator must exist at this point so
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* that we can actually open the scope to enter new names underneath it.
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* Allow search-to-root for single namesegs.
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*/
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status =
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acpi_ns_lookup(walk_state->scope_info, path, object_type,
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ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
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walk_state, &(node));
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#ifdef ACPI_ASL_COMPILER
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if (status == AE_NOT_FOUND) {
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/*
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* Table disassembly:
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* Target of Scope() not found. Generate an External for it, and
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* insert the name into the namespace.
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*/
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acpi_dm_add_op_to_external_list(op, path,
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ACPI_TYPE_DEVICE, 0, 0);
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status =
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acpi_ns_lookup(walk_state->scope_info, path,
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object_type, ACPI_IMODE_LOAD_PASS1,
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ACPI_NS_SEARCH_PARENT, walk_state,
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&node);
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}
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#endif
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR_NAMESPACE(walk_state->scope_info, path,
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status);
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return_ACPI_STATUS(status);
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}
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/*
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* Check to make sure that the target is
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* one of the opcodes that actually opens a scope
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*/
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switch (node->type) {
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case ACPI_TYPE_ANY:
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case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
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case ACPI_TYPE_DEVICE:
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case ACPI_TYPE_POWER:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_THERMAL:
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/* These are acceptable types */
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break;
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_STRING:
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case ACPI_TYPE_BUFFER:
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/*
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* These types we will allow, but we will change the type.
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* This enables some existing code of the form:
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*
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* Name (DEB, 0)
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* Scope (DEB) { ... }
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*
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* Note: silently change the type here. On the second pass,
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* we will report a warning
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Type override - [%4.4s] had invalid type (%s) "
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"for Scope operator, changed to type ANY\n",
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acpi_ut_get_node_name(node),
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acpi_ut_get_type_name(node->type)));
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node->type = ACPI_TYPE_ANY;
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walk_state->scope_info->common.value = ACPI_TYPE_ANY;
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break;
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case ACPI_TYPE_METHOD:
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/*
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* Allow scope change to root during execution of module-level
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* code. Root is typed METHOD during this time.
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*/
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if ((node == acpi_gbl_root_node) &&
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(walk_state->
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parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
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break;
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}
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/*lint -fallthrough */
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default:
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/* All other types are an error */
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ACPI_ERROR((AE_INFO,
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"Invalid type (%s) for target of "
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"Scope operator [%4.4s] (Cannot override)",
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acpi_ut_get_type_name(node->type),
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acpi_ut_get_node_name(node)));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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break;
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default:
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/*
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* For all other named opcodes, we will enter the name into
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* the namespace.
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*
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* Setup the search flags.
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* Since we are entering a name into the namespace, we do not want to
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* enable the search-to-root upsearch.
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*
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* There are only two conditions where it is acceptable that the name
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* already exists:
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* 1) the Scope() operator can reopen a scoping object that was
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* previously defined (Scope, Method, Device, etc.)
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* 2) Whenever we are parsing a deferred opcode (op_region, Buffer,
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* buffer_field, or Package), the name of the object is already
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* in the namespace.
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*/
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if (walk_state->deferred_node) {
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/* This name is already in the namespace, get the node */
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node = walk_state->deferred_node;
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status = AE_OK;
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break;
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}
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/*
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* If we are executing a method, do not create any namespace objects
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* during the load phase, only during execution.
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*/
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if (walk_state->method_node) {
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node = NULL;
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status = AE_OK;
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break;
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}
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flags = ACPI_NS_NO_UPSEARCH;
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if ((walk_state->opcode != AML_SCOPE_OP) &&
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(!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
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if (walk_state->namespace_override) {
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flags |= ACPI_NS_OVERRIDE_IF_FOUND;
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"[%s] Override allowed\n",
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acpi_ut_get_type_name
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(object_type)));
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} else {
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flags |= ACPI_NS_ERROR_IF_FOUND;
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"[%s] Cannot already exist\n",
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acpi_ut_get_type_name
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(object_type)));
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}
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} else {
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"[%s] Both Find or Create allowed\n",
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acpi_ut_get_type_name(object_type)));
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}
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/*
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* Enter the named type into the internal namespace. We enter the name
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* as we go downward in the parse tree. Any necessary subobjects that
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* involve arguments to the opcode must be created as we go back up the
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* parse tree later.
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*/
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status =
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acpi_ns_lookup(walk_state->scope_info, path, object_type,
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ACPI_IMODE_LOAD_PASS1, flags, walk_state,
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&node);
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if (ACPI_FAILURE(status)) {
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if (status == AE_ALREADY_EXISTS) {
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/* The name already exists in this scope */
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if (node->flags & ANOBJ_IS_EXTERNAL) {
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/*
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* Allow one create on an object or segment that was
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* previously declared External
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*/
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node->flags &= ~ANOBJ_IS_EXTERNAL;
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node->type = (u8) object_type;
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/* Just retyped a node, probably will need to open a scope */
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if (acpi_ns_opens_scope(object_type)) {
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status =
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acpi_ds_scope_stack_push
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(node, object_type,
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walk_state);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS
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(status);
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}
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}
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status = AE_OK;
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}
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}
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR_NAMESPACE(walk_state->scope_info,
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path, status);
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return_ACPI_STATUS(status);
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}
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}
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break;
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}
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/* Common exit */
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if (!op) {
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/* Create a new op */
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op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml);
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if (!op) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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}
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/* Initialize the op */
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#if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
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op->named.path = path;
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#endif
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if (node) {
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/*
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* Put the Node in the "op" object that the parser uses, so we
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* can get it again quickly when this scope is closed
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*/
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op->common.node = node;
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op->named.name = node->name.integer;
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}
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acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
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op);
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*out_op = op;
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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_ds_load1_end_op
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*
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* PARAMETERS: walk_state - Current state of the parse tree walk
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Ascending callback used during the loading of the namespace,
|
||
|
|
* both control methods and everything else.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
|
||
|
|
{
|
||
|
|
union acpi_parse_object *op;
|
||
|
|
acpi_object_type object_type;
|
||
|
|
acpi_status status = AE_OK;
|
||
|
|
|
||
|
|
#ifdef ACPI_ASL_COMPILER
|
||
|
|
u8 param_count;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ds_load1_end_op);
|
||
|
|
|
||
|
|
op = walk_state->op;
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
|
||
|
|
walk_state));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Disassembler: handle create field operators here.
|
||
|
|
*
|
||
|
|
* create_buffer_field is a deferred op that is typically processed in load
|
||
|
|
* pass 2. However, disassembly of control method contents walk the parse
|
||
|
|
* tree with ACPI_PARSE_LOAD_PASS1 and AML_CREATE operators are processed
|
||
|
|
* in a later walk. This is a problem when there is a control method that
|
||
|
|
* has the same name as the AML_CREATE object. In this case, any use of the
|
||
|
|
* name segment will be detected as a method call rather than a reference
|
||
|
|
* to a buffer field.
|
||
|
|
*
|
||
|
|
* This earlier creation during disassembly solves this issue by inserting
|
||
|
|
* the named object in the ACPI namespace so that references to this name
|
||
|
|
* would be a name string rather than a method call.
|
||
|
|
*/
|
||
|
|
if ((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE) &&
|
||
|
|
(walk_state->op_info->flags & AML_CREATE)) {
|
||
|
|
status = acpi_ds_create_buffer_field(op, walk_state);
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* We are only interested in opcodes that have an associated name */
|
||
|
|
|
||
|
|
if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
|
||
|
|
return_ACPI_STATUS(AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the object type to determine if we should pop the scope */
|
||
|
|
|
||
|
|
object_type = walk_state->op_info->object_type;
|
||
|
|
|
||
|
|
#ifndef ACPI_NO_METHOD_EXECUTION
|
||
|
|
if (walk_state->op_info->flags & AML_FIELD) {
|
||
|
|
/*
|
||
|
|
* If we are executing a method, do not create any namespace objects
|
||
|
|
* during the load phase, only during execution.
|
||
|
|
*/
|
||
|
|
if (!walk_state->method_node) {
|
||
|
|
if (walk_state->opcode == AML_FIELD_OP ||
|
||
|
|
walk_state->opcode == AML_BANK_FIELD_OP ||
|
||
|
|
walk_state->opcode == AML_INDEX_FIELD_OP) {
|
||
|
|
status =
|
||
|
|
acpi_ds_init_field_objects(op, walk_state);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If we are executing a method, do not create any namespace objects
|
||
|
|
* during the load phase, only during execution.
|
||
|
|
*/
|
||
|
|
if (!walk_state->method_node) {
|
||
|
|
if (op->common.aml_opcode == AML_REGION_OP) {
|
||
|
|
status =
|
||
|
|
acpi_ex_create_region(op->named.data,
|
||
|
|
op->named.length,
|
||
|
|
(acpi_adr_space_type)
|
||
|
|
((op->common.value.arg)->
|
||
|
|
common.value.integer),
|
||
|
|
walk_state);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
} else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
|
||
|
|
status =
|
||
|
|
acpi_ex_create_region(op->named.data,
|
||
|
|
op->named.length,
|
||
|
|
ACPI_ADR_SPACE_DATA_TABLE,
|
||
|
|
walk_state);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (op->common.aml_opcode == AML_NAME_OP) {
|
||
|
|
|
||
|
|
/* For Name opcode, get the object type from the argument */
|
||
|
|
|
||
|
|
if (op->common.value.arg) {
|
||
|
|
object_type = (acpi_ps_get_opcode_info((op->common.
|
||
|
|
value.arg)->
|
||
|
|
common.
|
||
|
|
aml_opcode))->
|
||
|
|
object_type;
|
||
|
|
|
||
|
|
/* Set node type if we have a namespace node */
|
||
|
|
|
||
|
|
if (op->common.node) {
|
||
|
|
op->common.node->type = (u8) object_type;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#ifdef ACPI_ASL_COMPILER
|
||
|
|
/*
|
||
|
|
* For external opcode, get the object type from the argument and
|
||
|
|
* get the parameter count from the argument's next.
|
||
|
|
*/
|
||
|
|
if (acpi_gbl_disasm_flag &&
|
||
|
|
op->common.node && op->common.aml_opcode == AML_EXTERNAL_OP) {
|
||
|
|
/*
|
||
|
|
* Note, if this external is not a method
|
||
|
|
* Op->Common.Value.Arg->Common.Next->Common.Value.Integer == 0
|
||
|
|
* Therefore, param_count will be 0.
|
||
|
|
*/
|
||
|
|
param_count =
|
||
|
|
(u8)op->common.value.arg->common.next->common.value.integer;
|
||
|
|
object_type = (u8)op->common.value.arg->common.value.integer;
|
||
|
|
op->common.node->flags |= ANOBJ_IS_EXTERNAL;
|
||
|
|
op->common.node->type = (u8)object_type;
|
||
|
|
|
||
|
|
acpi_dm_create_subobject_for_external((u8)object_type,
|
||
|
|
&op->common.node,
|
||
|
|
param_count);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Add the external to the external list because we may be
|
||
|
|
* emitting code based off of the items within the external list.
|
||
|
|
*/
|
||
|
|
acpi_dm_add_op_to_external_list(op, op->named.path,
|
||
|
|
(u8)object_type, param_count,
|
||
|
|
ACPI_EXT_ORIGIN_FROM_OPCODE |
|
||
|
|
ACPI_EXT_RESOLVED_REFERENCE);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If we are executing a method, do not create any namespace objects
|
||
|
|
* during the load phase, only during execution.
|
||
|
|
*/
|
||
|
|
if (!walk_state->method_node) {
|
||
|
|
if (op->common.aml_opcode == AML_METHOD_OP) {
|
||
|
|
/*
|
||
|
|
* method_op pkg_length name_string method_flags term_list
|
||
|
|
*
|
||
|
|
* Note: We must create the method node/object pair as soon as we
|
||
|
|
* see the method declaration. This allows later pass1 parsing
|
||
|
|
* of invocations of the method (need to know the number of
|
||
|
|
* arguments.)
|
||
|
|
*/
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
||
|
|
"LOADING-Method: State=%p Op=%p NamedObj=%p\n",
|
||
|
|
walk_state, op, op->named.node));
|
||
|
|
|
||
|
|
if (!acpi_ns_get_attached_object(op->named.node)) {
|
||
|
|
walk_state->operands[0] =
|
||
|
|
ACPI_CAST_PTR(void, op->named.node);
|
||
|
|
walk_state->num_operands = 1;
|
||
|
|
|
||
|
|
status =
|
||
|
|
acpi_ds_create_operands(walk_state,
|
||
|
|
op->common.value.
|
||
|
|
arg);
|
||
|
|
if (ACPI_SUCCESS(status)) {
|
||
|
|
status =
|
||
|
|
acpi_ex_create_method(op->named.
|
||
|
|
data,
|
||
|
|
op->named.
|
||
|
|
length,
|
||
|
|
walk_state);
|
||
|
|
}
|
||
|
|
|
||
|
|
walk_state->operands[0] = NULL;
|
||
|
|
walk_state->num_operands = 0;
|
||
|
|
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Pop the scope stack (only if loading a table) */
|
||
|
|
|
||
|
|
if (!walk_state->method_node &&
|
||
|
|
op->common.aml_opcode != AML_EXTERNAL_OP &&
|
||
|
|
acpi_ns_opens_scope(object_type)) {
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
|
||
|
|
"(%s): Popping scope for Op %p\n",
|
||
|
|
acpi_ut_get_type_name(object_type), op));
|
||
|
|
|
||
|
|
status = acpi_ds_scope_stack_pop(walk_state);
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|