0,0 → 1,207 |
/****************************************************************************** |
* |
* Module Name: nsparse - namespace interface to AML parser |
* |
*****************************************************************************/ |
|
/* |
* Copyright (C) 2000 - 2015, 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" |
|
#define _COMPONENT ACPI_NAMESPACE |
ACPI_MODULE_NAME("nsparse") |
|
/******************************************************************************* |
* |
* 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)); |
status = acpi_ps_parse_aml(walk_state); |
|
cleanup: |
acpi_ps_delete_parse_tree(parse_root); |
return_ACPI_STATUS(status); |
} |
|
/******************************************************************************* |
* |
* 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); |
|
/* |
* 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); |
} |