Release 4.11 drivers/acpi/acpica/nsparse.c
/******************************************************************************
*
* Module Name: nsparse - namespace interface to AML parser
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2017, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "acparser.h"
#include "acdispat.h"
#include "actables.h"
#include "acinterp.h"
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME("nsparse")
/*******************************************************************************
*
* FUNCTION: ns_execute_table
*
* PARAMETERS: table_desc - An ACPI table descriptor for table to parse
* start_node - Where to enter the table into the namespace
*
* RETURN: Status
*
* DESCRIPTION: Load ACPI/AML table by executing the entire table as a
* term_list.
*
******************************************************************************/
acpi_status
acpi_ns_execute_table(u32 table_index, struct acpi_namespace_node *start_node)
{
acpi_status status;
struct acpi_table_header *table;
acpi_owner_id owner_id;
struct acpi_evaluate_info *info = NULL;
u32 aml_length;
u8 *aml_start;
union acpi_operand_object *method_obj = NULL;
ACPI_FUNCTION_TRACE(ns_execute_table);
status = acpi_get_table_by_index(table_index, &table);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Table must consist of at least a complete header */
if (table->length < sizeof(struct acpi_table_header)) {
return_ACPI_STATUS(AE_BAD_HEADER);
}
aml_start = (u8 *)table + sizeof(struct acpi_table_header);
aml_length = table->length - sizeof(struct acpi_table_header);
status = acpi_tb_get_owner_id(table_index, &owner_id);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Create, initialize, and link a new temporary method object */
method_obj = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);
if (!method_obj) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Allocate the evaluation information block */
info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
if (!info) {
status = AE_NO_MEMORY;
goto cleanup;
}
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
"Create table code block: %p\n", method_obj));
method_obj->method.aml_start = aml_start;
method_obj->method.aml_length = aml_length;
method_obj->method.owner_id = owner_id;
method_obj->method.info_flags |= ACPI_METHOD_MODULE_LEVEL;
info->pass_number = ACPI_IMODE_EXECUTE;
info->node = start_node;
info->obj_desc = method_obj;
info->node_flags = info->node->flags;
info->full_pathname = acpi_ns_get_normalized_pathname(info->node, TRUE);
if (!info->full_pathname) {
status = AE_NO_MEMORY;
goto cleanup;
}
status = acpi_ps_execute_table(info);
cleanup:
if (info) {
ACPI_FREE(info->full_pathname);
info->full_pathname = NULL;
}
ACPI_FREE(info);
acpi_ut_remove_reference(method_obj);
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lv Zheng | 333 | 100.00% | 1 | 100.00% |
| Total | 333 | 100.00% | 1 | 100.00% |
/*******************************************************************************
*
* FUNCTION: ns_one_complete_parse
*
* PARAMETERS: pass_number - 1 or 2
* table_desc - The table to be parsed.
*
* RETURN: Status
*
* DESCRIPTION: Perform one complete parse of an ACPI/AML table.
*
******************************************************************************/
acpi_status
acpi_ns_one_complete_parse(u32 pass_number,
u32 table_index,
struct acpi_namespace_node *start_node)
{
union acpi_parse_object *parse_root;
acpi_status status;
u32 aml_length;
u8 *aml_start;
struct acpi_walk_state *walk_state;
struct acpi_table_header *table;
acpi_owner_id owner_id;
ACPI_FUNCTION_TRACE(ns_one_complete_parse);
status = acpi_get_table_by_index(table_index, &table);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Table must consist of at least a complete header */
if (table->length < sizeof(struct acpi_table_header)) {
return_ACPI_STATUS(AE_BAD_HEADER);
}
aml_start = (u8 *)table + sizeof(struct acpi_table_header);
aml_length = table->length - sizeof(struct acpi_table_header);
status = acpi_tb_get_owner_id(table_index, &owner_id);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Create and init a Root Node */
parse_root = acpi_ps_create_scope_op(aml_start);
if (!parse_root) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Create and initialize a new walk state */
walk_state = acpi_ds_create_walk_state(owner_id, NULL, NULL, NULL);
if (!walk_state) {
acpi_ps_free_op(parse_root);
return_ACPI_STATUS(AE_NO_MEMORY);
}
status = acpi_ds_init_aml_walk(walk_state, parse_root, NULL,
aml_start, aml_length, NULL,
(u8)pass_number);
if (ACPI_FAILURE(status)) {
acpi_ds_delete_walk_state(walk_state);
goto cleanup;
}
/* Found OSDT table, enable the namespace override feature */
if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_OSDT) &&
pass_number == ACPI_IMODE_LOAD_PASS1) {
walk_state->namespace_override = TRUE;
}
/* start_node is the default location to load the table */
if (start_node && start_node != acpi_gbl_root_node) {
status =
acpi_ds_scope_stack_push(start_node, ACPI_TYPE_METHOD,
walk_state);
if (ACPI_FAILURE(status)) {
acpi_ds_delete_walk_state(walk_state);
goto cleanup;
}
}
/* Parse the AML */
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
"*PARSE* pass %u parse\n", pass_number));
acpi_ex_enter_interpreter();
status = acpi_ps_parse_aml(walk_state);
acpi_ex_exit_interpreter();
cleanup:
acpi_ps_delete_parse_tree(parse_root);
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Moore | 153 | 45.95% | 7 | 63.64% |
| Lv Zheng | 92 | 27.63% | 2 | 18.18% |
| Andy Grover | 88 | 26.43% | 2 | 18.18% |
| Total | 333 | 100.00% | 11 | 100.00% |
/*******************************************************************************
*
* FUNCTION: acpi_ns_parse_table
*
* PARAMETERS: table_desc - An ACPI table descriptor for table to parse
* start_node - Where to enter the table into the namespace
*
* RETURN: Status
*
* DESCRIPTION: Parse AML within an ACPI table and return a tree of ops
*
******************************************************************************/
acpi_status
acpi_ns_parse_table(u32 table_index, struct acpi_namespace_node *start_node)
{
acpi_status status;
ACPI_FUNCTION_TRACE(ns_parse_table);
if (acpi_gbl_parse_table_as_term_list) {
ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start load pass\n"));
status = acpi_ns_execute_table(table_index, start_node);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
} else {
/*
* AML Parse, pass 1
*
* In this pass, we load most of the namespace. Control methods
* are not parsed until later. A parse tree is not created.
* Instead, each Parser Op subtree is deleted when it is finished.
* This saves a great deal of memory, and allows a small cache of
* parse objects to service the entire parse. The second pass of
* the parse then performs another complete parse of the AML.
*/
ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 1\n"));
status = acpi_ns_one_complete_parse(ACPI_IMODE_LOAD_PASS1,
table_index, start_node);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* AML Parse, pass 2
*
* In this pass, we resolve forward references and other things
* that could not be completed during the first pass.
* Another complete parse of the AML is performed, but the
* overhead of this is compensated for by the fact that the
* parse objects are all cached.
*/
ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 2\n"));
status = acpi_ns_one_complete_parse(ACPI_IMODE_LOAD_PASS2,
table_index, start_node);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lv Zheng | 54 | 39.42% | 3 | 27.27% |
| Andy Grover | 54 | 39.42% | 2 | 18.18% |
| Robert Moore | 29 | 21.17% | 6 | 54.55% |
| Total | 137 | 100.00% | 11 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Lv Zheng | 483 | 57.71% | 5 | 22.73% |
| Robert Moore | 187 | 22.34% | 11 | 50.00% |
| Andy Grover | 161 | 19.24% | 4 | 18.18% |
| Len Brown | 5 | 0.60% | 1 | 4.55% |
| Patrick Mochel | 1 | 0.12% | 1 | 4.55% |
| Total | 837 | 100.00% | 22 | 100.00% |
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