diff options
Diffstat (limited to 'drivers/acpi/parser/psparse.c')
| -rw-r--r-- | drivers/acpi/parser/psparse.c | 1304 |
1 files changed, 0 insertions, 1304 deletions
diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c deleted file mode 100644 index bbfdc1a58c2..00000000000 --- a/drivers/acpi/parser/psparse.c +++ /dev/null @@ -1,1304 +0,0 @@ -/****************************************************************************** - * - * Module Name: psparse - Parser top level AML parse routines - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2005, R. Byron Moore - * 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. - */ - - -/* - * Parse the AML and build an operation tree as most interpreters, - * like Perl, do. Parsing is done by hand rather than with a YACC - * generated parser to tightly constrain stack and dynamic memory - * usage. At the same time, parsing is kept flexible and the code - * fairly compact by parsing based on a list of AML opcode - * templates in aml_op_info[] - */ - -#include <acpi/acpi.h> -#include <acpi/acparser.h> -#include <acpi/acdispat.h> -#include <acpi/amlcode.h> -#include <acpi/acnamesp.h> -#include <acpi/acinterp.h> - -#define _COMPONENT ACPI_PARSER - ACPI_MODULE_NAME ("psparse") - - -static u32 acpi_gbl_depth = 0; - -/* Local prototypes */ - -static void -acpi_ps_complete_this_op ( - struct acpi_walk_state *walk_state, - union acpi_parse_object *op); - -static acpi_status -acpi_ps_next_parse_state ( - struct acpi_walk_state *walk_state, - union acpi_parse_object *op, - acpi_status callback_status); - -static acpi_status -acpi_ps_parse_loop ( - struct acpi_walk_state *walk_state); - - -/******************************************************************************* - * - * FUNCTION: acpi_ps_get_opcode_size - * - * PARAMETERS: Opcode - An AML opcode - * - * RETURN: Size of the opcode, in bytes (1 or 2) - * - * DESCRIPTION: Get the size of the current opcode. - * - ******************************************************************************/ - -u32 -acpi_ps_get_opcode_size ( - u32 opcode) -{ - - /* Extended (2-byte) opcode if > 255 */ - - if (opcode > 0x00FF) { - return (2); - } - - /* Otherwise, just a single byte opcode */ - - return (1); -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ps_peek_opcode - * - * PARAMETERS: parser_state - A parser state object - * - * RETURN: Next AML opcode - * - * DESCRIPTION: Get next AML opcode (without incrementing AML pointer) - * - ******************************************************************************/ - -u16 -acpi_ps_peek_opcode ( - struct acpi_parse_state *parser_state) -{ - u8 *aml; - u16 opcode; - - - aml = parser_state->aml; - opcode = (u16) ACPI_GET8 (aml); - - if (opcode == AML_EXTOP) { - /* Extended opcode */ - - aml++; - opcode = (u16) ((opcode << 8) | ACPI_GET8 (aml)); - } - - return (opcode); -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ps_complete_this_op - * - * PARAMETERS: walk_state - Current State - * Op - Op to complete - * - * RETURN: None. - * - * DESCRIPTION: Perform any cleanup at the completion of an Op. - * - ******************************************************************************/ - -static void -acpi_ps_complete_this_op ( - struct acpi_walk_state *walk_state, - union acpi_parse_object *op) -{ - union acpi_parse_object *prev; - union acpi_parse_object *next; - const struct acpi_opcode_info *parent_info; - union acpi_parse_object *replacement_op = NULL; - - - ACPI_FUNCTION_TRACE_PTR ("ps_complete_this_op", op); - - - /* Check for null Op, can happen if AML code is corrupt */ - - if (!op) { - return_VOID; - } - - /* Delete this op and the subtree below it if asked to */ - - if (((walk_state->parse_flags & ACPI_PARSE_TREE_MASK) != ACPI_PARSE_DELETE_TREE) || - (walk_state->op_info->class == AML_CLASS_ARGUMENT)) { - return_VOID; - } - - /* Make sure that we only delete this subtree */ - - if (op->common.parent) { - /* - * Check if we need to replace the operator and its subtree - * with a return value op (placeholder op) - */ - parent_info = acpi_ps_get_opcode_info (op->common.parent->common.aml_opcode); - - switch (parent_info->class) { - case AML_CLASS_CONTROL: - break; - - case AML_CLASS_CREATE: - - /* - * These opcodes contain term_arg operands. The current - * op must be replaced by a placeholder return op - */ - replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); - if (!replacement_op) { - goto cleanup; - } - break; - - case AML_CLASS_NAMED_OBJECT: - - /* - * These opcodes contain term_arg operands. The current - * op must be replaced by a placeholder return op - */ - if ((op->common.parent->common.aml_opcode == AML_REGION_OP) || - (op->common.parent->common.aml_opcode == AML_DATA_REGION_OP) || - (op->common.parent->common.aml_opcode == AML_BUFFER_OP) || - (op->common.parent->common.aml_opcode == AML_PACKAGE_OP) || - (op->common.parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) { - replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); - if (!replacement_op) { - goto cleanup; - } - } - - if ((op->common.parent->common.aml_opcode == AML_NAME_OP) && - (walk_state->descending_callback != acpi_ds_exec_begin_op)) { - if ((op->common.aml_opcode == AML_BUFFER_OP) || - (op->common.aml_opcode == AML_PACKAGE_OP) || - (op->common.aml_opcode == AML_VAR_PACKAGE_OP)) { - replacement_op = acpi_ps_alloc_op (op->common.aml_opcode); - if (!replacement_op) { - goto cleanup; - } - - replacement_op->named.data = op->named.data; - replacement_op->named.length = op->named.length; - } - } - break; - - default: - replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP); - if (!replacement_op) { - goto cleanup; - } - } - - /* We must unlink this op from the parent tree */ - - prev = op->common.parent->common.value.arg; - if (prev == op) { - /* This op is the first in the list */ - - if (replacement_op) { - replacement_op->common.parent = op->common.parent; - replacement_op->common.value.arg = NULL; - replacement_op->common.node = op->common.node; - op->common.parent->common.value.arg = replacement_op; - replacement_op->common.next = op->common.next; - } - else { - op->common.parent->common.value.arg = op->common.next; - } - } - - /* Search the parent list */ - - else while (prev) { - /* Traverse all siblings in the parent's argument list */ - - next = prev->common.next; - if (next == op) { - if (replacement_op) { - replacement_op->common.parent = op->common.parent; - replacement_op->common.value.arg = NULL; - replacement_op->common.node = op->common.node; - prev->common.next = replacement_op; - replacement_op->common.next = op->common.next; - next = NULL; - } - else { - prev->common.next = op->common.next; - next = NULL; - } - } - prev = next; - } - } - - -cleanup: - - /* Now we can actually delete the subtree rooted at Op */ - - acpi_ps_delete_parse_tree (op); - return_VOID; -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ps_next_parse_state - * - * PARAMETERS: walk_state - Current state - * Op - Current parse op - * callback_status - Status from previous operation - * - * RETURN: Status - * - * DESCRIPTION: Update the parser state based upon the return exception from - * the parser callback. - * - ******************************************************************************/ - -static acpi_status -acpi_ps_next_parse_state ( - struct acpi_walk_state *walk_state, - union acpi_parse_object *op, - acpi_status callback_status) -{ - struct acpi_parse_state *parser_state = &walk_state->parser_state; - acpi_status status = AE_CTRL_PENDING; - - - ACPI_FUNCTION_TRACE_PTR ("ps_next_parse_state", op); - - - switch (callback_status) { - case AE_CTRL_TERMINATE: - - /* - * A control method was terminated via a RETURN statement. - * The walk of this method is complete. - */ - parser_state->aml = parser_state->aml_end; - status = AE_CTRL_TERMINATE; - break; - - - case AE_CTRL_BREAK: - - parser_state->aml = walk_state->aml_last_while; - walk_state->control_state->common.value = FALSE; - status = AE_CTRL_BREAK; - break; - - case AE_CTRL_CONTINUE: - - - parser_state->aml = walk_state->aml_last_while; - status = AE_CTRL_CONTINUE; - break; - - case AE_CTRL_PENDING: - - parser_state->aml = walk_state->aml_last_while; - break; - -#if 0 - case AE_CTRL_SKIP: - - parser_state->aml = parser_state->scope->parse_scope.pkg_end; - status = AE_OK; - break; -#endif - - case AE_CTRL_TRUE: - - /* - * Predicate of an IF was true, and we are at the matching ELSE. - * Just close out this package - */ - parser_state->aml = acpi_ps_get_next_package_end (parser_state); - break; - - - case AE_CTRL_FALSE: - - /* - * Either an IF/WHILE Predicate was false or we encountered a BREAK - * opcode. In both cases, we do not execute the rest of the - * package; We simply close out the parent (finishing the walk of - * this branch of the tree) and continue execution at the parent - * level. - */ - parser_state->aml = parser_state->scope->parse_scope.pkg_end; - - /* In the case of a BREAK, just force a predicate (if any) to FALSE */ - - walk_state->control_state->common.value = FALSE; - status = AE_CTRL_END; - break; - - - case AE_CTRL_TRANSFER: - - /* A method call (invocation) -- transfer control */ - - status = AE_CTRL_TRANSFER; - walk_state->prev_op = op; - walk_state->method_call_op = op; - walk_state->method_call_node = (op->common.value.arg)->common.node; - - /* Will return value (if any) be used by the caller? */ - - walk_state->return_used = acpi_ds_is_result_used (op, walk_state); - break; - - - default: - - status = callback_status; - if ((callback_status & AE_CODE_MASK) == AE_CODE_CONTROL) { - status = AE_OK; - } - break; - } - - return_ACPI_STATUS (status); -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ps_parse_loop - * - * PARAMETERS: walk_state - Current state - * - * RETURN: Status - * - * DESCRIPTION: Parse AML (pointed to by the current parser state) and return - * a tree of ops. - * - ******************************************************************************/ - -static acpi_status -acpi_ps_parse_loop ( - struct acpi_walk_state *walk_state) -{ - acpi_status status = AE_OK; - union acpi_parse_object *op = NULL; /* current op */ - union acpi_parse_object *arg = NULL; - union acpi_parse_object *pre_op = NULL; - struct acpi_parse_state *parser_state; - u8 *aml_op_start = NULL; - - - ACPI_FUNCTION_TRACE_PTR ("ps_parse_loop", walk_state); - - if (walk_state->descending_callback == NULL) { - return_ACPI_STATUS (AE_BAD_PARAMETER); - } - - parser_state = &walk_state->parser_state; - walk_state->arg_types = 0; - -#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) - - if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) { - /* We are restarting a preempted control method */ - - if (acpi_ps_has_completed_scope (parser_state)) { - /* - * We must check if a predicate to an IF or WHILE statement - * was just completed - */ - if ((parser_state->scope->parse_scope.op) && - ((parser_state->scope->parse_scope.op->common.aml_opcode == AML_IF_OP) || - (parser_state->scope->parse_scope.op->common.aml_opcode == AML_WHILE_OP)) && - (walk_state->control_state) && - (walk_state->control_state->common.state == - ACPI_CONTROL_PREDICATE_EXECUTING)) { - /* - * A predicate was just completed, get the value of the - * predicate and branch based on that value - */ - walk_state->op = NULL; - status = acpi_ds_get_predicate_value (walk_state, ACPI_TO_POINTER (TRUE)); - if (ACPI_FAILURE (status) && - ((status & AE_CODE_MASK) != AE_CODE_CONTROL)) { - if (status == AE_AML_NO_RETURN_VALUE) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Invoked method did not return a value, %s\n", - acpi_format_exception (status))); - - } - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "get_predicate Failed, %s\n", - acpi_format_exception (status))); - return_ACPI_STATUS (status); - } - - status = acpi_ps_next_parse_state (walk_state, op, status); - } - - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op)); - } - else if (walk_state->prev_op) { - /* We were in the middle of an op */ - - op = walk_state->prev_op; - walk_state->arg_types = walk_state->prev_arg_types; - } - } -#endif - - /* Iterative parsing loop, while there is more AML to process: */ - - while ((parser_state->aml < parser_state->aml_end) || (op)) { - aml_op_start = parser_state->aml; - if (!op) { - /* Get the next opcode from the AML stream */ - - walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml, - parser_state->aml_start); - walk_state->opcode = acpi_ps_peek_opcode (parser_state); - - /* - * First cut to determine what we have found: - * 1) A valid AML opcode - * 2) A name string - * 3) An unknown/invalid opcode - */ - walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode); - switch (walk_state->op_info->class) { - case AML_CLASS_ASCII: - case AML_CLASS_PREFIX: - /* - * Starts with a valid prefix or ASCII char, this is a name - * string. Convert the bare name string to a namepath. - */ - walk_state->opcode = AML_INT_NAMEPATH_OP; - walk_state->arg_types = ARGP_NAMESTRING; - break; - - case AML_CLASS_UNKNOWN: - - /* The opcode is unrecognized. Just skip unknown opcodes */ - - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "Found unknown opcode %X at AML address %p offset %X, ignoring\n", - walk_state->opcode, parser_state->aml, walk_state->aml_offset)); - - ACPI_DUMP_BUFFER (parser_state->aml, 128); - - /* Assume one-byte bad opcode */ - - parser_state->aml++; - continue; - - default: - - /* Found opcode info, this is a normal opcode */ - - parser_state->aml += acpi_ps_get_opcode_size (walk_state->opcode); - walk_state->arg_types = walk_state->op_info->parse_args; - break; - } - - /* Create Op structure and append to parent's argument list */ - - if (walk_state->op_info->flags & AML_NAMED) { - /* Allocate a new pre_op if necessary */ - - if (!pre_op) { - pre_op = acpi_ps_alloc_op (walk_state->opcode); - if (!pre_op) { - status = AE_NO_MEMORY; - goto close_this_op; - } - } - - pre_op->common.value.arg = NULL; - pre_op->common.aml_opcode = walk_state->opcode; - - /* - * Get and append arguments until we find the node that contains - * the name (the type ARGP_NAME). - */ - while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) && - (GET_CURRENT_ARG_TYPE (walk_state->arg_types) != ARGP_NAME)) { - status = acpi_ps_get_next_arg (walk_state, parser_state, - GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg); - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - - acpi_ps_append_arg (pre_op, arg); - INCREMENT_ARG_LIST (walk_state->arg_types); - } - - /* - * Make sure that we found a NAME and didn't run out of - * arguments - */ - if (!GET_CURRENT_ARG_TYPE (walk_state->arg_types)) { - status = AE_AML_NO_OPERAND; - goto close_this_op; - } - - /* We know that this arg is a name, move to next arg */ - - INCREMENT_ARG_LIST (walk_state->arg_types); - - /* - * Find the object. This will either insert the object into - * the namespace or simply look it up - */ - walk_state->op = NULL; - - status = walk_state->descending_callback (walk_state, &op); - if (ACPI_FAILURE (status)) { - ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, - "During name lookup/catalog, %s\n", - acpi_format_exception (status))); - goto close_this_op; - } - - if (!op) { - continue; - } - - status = acpi_ps_next_parse_state (walk_state, op, status); - if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; - } - - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - - acpi_ps_append_arg (op, pre_op->common.value.arg); - acpi_gbl_depth++; - - if (op->common.aml_opcode == AML_REGION_OP) { - /* - * Defer final parsing of an operation_region body, - * because we don't have enough info in the first pass - * to parse it correctly (i.e., there may be method - * calls within the term_arg elements of the body.) - * - * However, we must continue parsing because - * the opregion is not a standalone package -- - * we don't know where the end is at this point. - * - * (Length is unknown until parse of the body complete) - */ - op->named.data = aml_op_start; - op->named.length = 0; - } - } - else { - /* Not a named opcode, just allocate Op and append to parent */ - - walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode); - op = acpi_ps_alloc_op (walk_state->opcode); - if (!op) { - status = AE_NO_MEMORY; - goto close_this_op; - } - - if (walk_state->op_info->flags & AML_CREATE) { - /* - * Backup to beginning of create_xXXfield declaration - * body_length is unknown until we parse the body - */ - op->named.data = aml_op_start; - op->named.length = 0; - } - - acpi_ps_append_arg (acpi_ps_get_parent_scope (parser_state), op); - - if ((walk_state->descending_callback != NULL)) { - /* - * Find the object. This will either insert the object into - * the namespace or simply look it up - */ - walk_state->op = op; - - status = walk_state->descending_callback (walk_state, &op); - status = acpi_ps_next_parse_state (walk_state, op, status); - if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; - } - - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - } - } - - op->common.aml_offset = walk_state->aml_offset; - - if (walk_state->op_info) { - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "Opcode %4.4X [%s] Op %p Aml %p aml_offset %5.5X\n", - (u32) op->common.aml_opcode, walk_state->op_info->name, - op, parser_state->aml, op->common.aml_offset)); - } - } - - - /* - * Start arg_count at zero because we don't know if there are - * any args yet - */ - walk_state->arg_count = 0; - - /* Are there any arguments that must be processed? */ - - if (walk_state->arg_types) { - /* Get arguments */ - - switch (op->common.aml_opcode) { - case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ - case AML_WORD_OP: /* AML_WORDDATA_ARG */ - case AML_DWORD_OP: /* AML_DWORDATA_ARG */ - case AML_QWORD_OP: /* AML_QWORDATA_ARG */ - case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */ - - /* Fill in constant or string argument directly */ - - acpi_ps_get_next_simple_arg (parser_state, - GET_CURRENT_ARG_TYPE (walk_state->arg_types), op); - break; - - case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */ - - status = acpi_ps_get_next_namepath (walk_state, parser_state, op, 1); - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - - walk_state->arg_types = 0; - break; - - default: - - /* - * Op is not a constant or string, append each argument - * to the Op - */ - while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) && - !walk_state->arg_count) { - walk_state->aml_offset = (u32) - ACPI_PTR_DIFF (parser_state->aml, parser_state->aml_start); - - status = acpi_ps_get_next_arg (walk_state, parser_state, - GET_CURRENT_ARG_TYPE (walk_state->arg_types), - &arg); - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - - if (arg) { - arg->common.aml_offset = walk_state->aml_offset; - acpi_ps_append_arg (op, arg); - } - INCREMENT_ARG_LIST (walk_state->arg_types); - } - - /* Special processing for certain opcodes */ - - switch (op->common.aml_opcode) { - case AML_METHOD_OP: - - /* - * Skip parsing of control method - * because we don't have enough info in the first pass - * to parse it correctly. - * - * Save the length and address of the body - */ - op->named.data = parser_state->aml; - op->named.length = (u32) (parser_state->pkg_end - - parser_state->aml); - - /* Skip body of method */ - - parser_state->aml = parser_state->pkg_end; - walk_state->arg_count = 0; - break; - - case AML_BUFFER_OP: - case AML_PACKAGE_OP: - case AML_VAR_PACKAGE_OP: - - if ((op->common.parent) && - (op->common.parent->common.aml_opcode == AML_NAME_OP) && - (walk_state->descending_callback != acpi_ds_exec_begin_op)) { - /* - * Skip parsing of Buffers and Packages - * because we don't have enough info in the first pass - * to parse them correctly. - */ - op->named.data = aml_op_start; - op->named.length = (u32) (parser_state->pkg_end - - aml_op_start); - - /* Skip body */ - - parser_state->aml = parser_state->pkg_end; - walk_state->arg_count = 0; - } - break; - - case AML_WHILE_OP: - - if (walk_state->control_state) { - walk_state->control_state->control.package_end = - parser_state->pkg_end; - } - break; - - default: - - /* No action for all other opcodes */ - break; - } - break; - } - } - - /* Check for arguments that need to be processed */ - - if (walk_state->arg_count) { - /* - * There are arguments (complex ones), push Op and - * prepare for argument - */ - status = acpi_ps_push_scope (parser_state, op, - walk_state->arg_types, walk_state->arg_count); - if (ACPI_FAILURE (status)) { - goto close_this_op; - } - op = NULL; - continue; - } - - /* - * All arguments have been processed -- Op is complete, - * prepare for next - */ - walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode); - if (walk_state->op_info->flags & AML_NAMED) { - if (acpi_gbl_depth) { - acpi_gbl_depth--; - } - - if (op->common.aml_opcode == AML_REGION_OP) { - /* - * Skip parsing of control method or opregion body, - * because we don't have enough info in the first pass - * to parse them correctly. - * - * Completed parsing an op_region declaration, we now - * know the length. - */ - op->named.length = (u32) (parser_state->aml - op->named.data); - } - } - - if (walk_state->op_info->flags & AML_CREATE) { - /* - * Backup to beginning of create_xXXfield declaration (1 for - * Opcode) - * - * body_length is unknown until we parse the body - */ - op->named.length = (u32) (parser_state->aml - op->named.data); - } - - /* This op complete, notify the dispatcher */ - - if (walk_state->ascending_callback != NULL) { - walk_state->op = op; - walk_state->opcode = op->common.aml_opcode; - - status = walk_state->ascending_callback (walk_state); - status = acpi_ps_next_parse_state (walk_state, op, status); - if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; - } - } - - -close_this_op: - /* - * Finished one argument of the containing scope - */ - parser_state->scope->parse_scope.arg_count--; - - /* Close this Op (will result in parse subtree deletion) */ - - acpi_ps_complete_this_op (walk_state, op); - op = NULL; - if (pre_op) { - acpi_ps_free_op (pre_op); - pre_op = NULL; - } - - switch (status) { - case AE_OK: - break; - - - case AE_CTRL_TRANSFER: - - /* We are about to transfer to a called method. */ - - walk_state->prev_op = op; - walk_state->prev_arg_types = walk_state->arg_types; - return_ACPI_STATUS (status); - - - case AE_CTRL_END: - - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - - if (op) { - walk_state->op = op; - walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode); - walk_state->opcode = op->common.aml_opcode; - - status = walk_state->ascending_callback (walk_state); - status = acpi_ps_next_parse_state (walk_state, op, status); - - acpi_ps_complete_this_op (walk_state, op); - op = NULL; - } - status = AE_OK; - break; - - - case AE_CTRL_BREAK: - case AE_CTRL_CONTINUE: - - /* Pop off scopes until we find the While */ - - while (!op || (op->common.aml_opcode != AML_WHILE_OP)) { - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - } - - /* Close this iteration of the While loop */ - - walk_state->op = op; - walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode); - walk_state->opcode = op->common.aml_opcode; - - status = walk_state->ascending_callback (walk_state); - status = acpi_ps_next_parse_state (walk_state, op, status); - - acpi_ps_complete_this_op (walk_state, op); - op = NULL; - - status = AE_OK; - break; - - - case AE_CTRL_TERMINATE: - - status = AE_OK; - - /* Clean up */ - do { - if (op) { - acpi_ps_complete_this_op (walk_state, op); - } - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - - } while (op); - - return_ACPI_STATUS (status); - - - default: /* All other non-AE_OK status */ - - do { - if (op) { - acpi_ps_complete_this_op (walk_state, op); - } - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - - } while (op); - - - /* - * TBD: Cleanup parse ops on error - */ -#if 0 - if (op == NULL) { - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - } -#endif - walk_state->prev_op = op; - walk_state->prev_arg_types = walk_state->arg_types; - return_ACPI_STATUS (status); - } - - /* This scope complete? */ - - if (acpi_ps_has_completed_scope (parser_state)) { - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op)); - } - else { - op = NULL; - } - - } /* while parser_state->Aml */ - - - /* - * Complete the last Op (if not completed), and clear the scope stack. - * It is easily possible to end an AML "package" with an unbounded number - * of open scopes (such as when several ASL blocks are closed with - * sequential closing braces). We want to terminate each one cleanly. - */ - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", op)); - do { - if (op) { - if (walk_state->ascending_callback != NULL) { - walk_state->op = op; - walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode); - walk_state->opcode = op->common.aml_opcode; - - status = walk_state->ascending_callback (walk_state); - status = acpi_ps_next_parse_state (walk_state, op, status); - if (status == AE_CTRL_PENDING) { - status = AE_OK; - goto close_this_op; - } - - if (status == AE_CTRL_TERMINATE) { - status = AE_OK; - - /* Clean up */ - do { - if (op) { - acpi_ps_complete_this_op (walk_state, op); - } - - acpi_ps_pop_scope (parser_state, &op, - &walk_state->arg_types, &walk_state->arg_count); - - } while (op); - - return_ACPI_STATUS (status); - } - - else if (ACPI_FAILURE (status)) { - acpi_ps_complete_this_op (walk_state, op); - return_ACPI_STATUS (status); - } - } - - acpi_ps_complete_this_op (walk_state, op); - } - - acpi_ps_pop_scope (parser_state, &op, &walk_state->arg_types, - &walk_state->arg_count); - - } while (op); - - return_ACPI_STATUS (status); -} - - -/******************************************************************************* - * - * FUNCTION: acpi_ps_parse_aml - * - * PARAMETERS: walk_state - Current state - * - * - * RETURN: Status - * - * DESCRIPTION: Parse raw AML and return a tree of ops - * - ******************************************************************************/ - -acpi_status -acpi_ps_parse_aml ( - struct acpi_walk_state *walk_state) -{ - acpi_status status; - acpi_status terminate_status; - struct acpi_thread_state *thread; - struct acpi_thread_state *prev_walk_list = acpi_gbl_current_walk_list; - struct acpi_walk_state *previous_walk_state; - - - ACPI_FUNCTION_TRACE ("ps_parse_aml"); - - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "Entered with walk_state=%p Aml=%p size=%X\n", - walk_state, walk_state->parser_state.aml, - walk_state->parser_state.aml_size)); - - - /* Create and initialize a new thread state */ - - thread = acpi_ut_create_thread_state (); - if (!thread) { - return_ACPI_STATUS (AE_NO_MEMORY); - } - - walk_state->thread = thread; - acpi_ds_push_walk_state (walk_state, thread); - - /* - * This global allows the AML debugger to get a handle to the currently - * executing control method. - */ - acpi_gbl_current_walk_list = thread; - - /* - * Execute the walk loop as long as there is a valid Walk State. This - * handles nested control method invocations without recursion. - */ - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "State=%p\n", walk_state)); - - status = AE_OK; - while (walk_state) { - if (ACPI_SUCCESS (status)) { - /* - * The parse_loop executes AML until the method terminates - * or calls another method. - */ - status = acpi_ps_parse_loop (walk_state); - } - - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "Completed one call to walk loop, %s State=%p\n", - acpi_format_exception (status), walk_state)); - - if (status == AE_CTRL_TRANSFER) { - /* - * A method call was detected. - * Transfer control to the called control method - */ - status = acpi_ds_call_control_method (thread, walk_state, NULL); - - /* - * If the transfer to the new method method call worked, a new walk - * state was created -- get it - */ - walk_state = acpi_ds_get_current_walk_state (thread); - continue; - } - else if (status == AE_CTRL_TERMINATE) { - status = AE_OK; - } - else if ((status != AE_OK) && (walk_state->method_desc)) { - ACPI_REPORT_METHOD_ERROR ("Method execution failed", - walk_state->method_node, NULL, status); - - /* Check for possible multi-thread reentrancy problem */ - - if ((status == AE_ALREADY_EXISTS) && - (!walk_state->method_desc->method.semaphore)) { - /* - * This method is marked not_serialized, but it tried to create - * a named object, causing the second thread entrance to fail. - * We will workaround this by marking the method permanently - * as Serialized. - */ - walk_state->method_desc->method.method_flags |= AML_METHOD_SERIALIZED; - walk_state->method_desc->method.concurrency = 1; - } - } - - if (walk_state->method_desc) { - /* Decrement the thread count on the method parse tree */ - - if (walk_state->method_desc->method.thread_count) { - walk_state->method_desc->method.thread_count--; - } - } - - /* We are done with this walk, move on to the parent if any */ - - walk_state = acpi_ds_pop_walk_state (thread); - - /* Reset the current scope to the beginning of scope stack */ - - acpi_ds_scope_stack_clear (walk_state); - - /* - * If we just returned from the execution of a control method, - * there's lots of cleanup to do - */ - if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == ACPI_PARSE_EXECUTE) { - terminate_status = acpi_ds_terminate_control_method (walk_state); - if (ACPI_FAILURE (terminate_status)) { - ACPI_REPORT_ERROR (( - "Could not terminate control method properly\n")); - - /* Ignore error and continue */ - } - } - - /* Delete this walk state and all linked control states */ - - acpi_ps_cleanup_scope (&walk_state->parser_state); - - previous_walk_state = walk_state; - - ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, - "return_value=%p, implicit_value=%p State=%p\n", - walk_state->return_desc, walk_state->implicit_return_obj, walk_state)); - - /* Check if we have restarted a preempted walk */ - - walk_state = acpi_ds_get_current_walk_state (thread); - if (walk_state) { - if (ACPI_SUCCESS (status)) { - /* - * There is another walk state, restart it. - * If the method return value is not used by the parent, - * The object is deleted - */ - if (!previous_walk_state->return_desc) { - status = acpi_ds_restart_control_method (walk_state, - previous_walk_state->implicit_return_obj); - } - else { - /* - * We have a valid return value, delete any implicit - * return value. - */ - acpi_ds_clear_implicit_return (previous_walk_state); - - status = acpi_ds_restart_control_method (walk_state, - previous_walk_state->return_desc); - } - if (ACPI_SUCCESS (status)) { - walk_state->walk_type |= ACPI_WALK_METHOD_RESTART; - } - } - else { - /* On error, delete any return object */ - - acpi_ut_remove_reference (previous_walk_state->return_desc); - } - } - - /* - * Just completed a 1st-level method, save the final internal return - * value (if any) - */ - else if (previous_walk_state->caller_return_desc) { - if (previous_walk_state->implicit_return_obj) { - *(previous_walk_state->caller_return_desc) = - previous_walk_state->implicit_return_obj; - } - else { - /* NULL if no return value */ - - *(previous_walk_state->caller_return_desc) = - previous_walk_state->return_desc; - } - } - else { - if (previous_walk_state->return_desc) { - /* Caller doesn't want it, must delete it */ - - acpi_ut_remove_reference (previous_walk_state->return_desc); - } - if (previous_walk_state->implicit_return_obj) { - /* Caller doesn't want it, must delete it */ - - acpi_ut_remove_reference (previous_walk_state->implicit_return_obj); - } - } - - acpi_ds_delete_walk_state (previous_walk_state); - } - - /* Normal exit */ - - acpi_ex_release_all_mutexes (thread); - acpi_ut_delete_generic_state (ACPI_CAST_PTR (union acpi_generic_state, thread)); - acpi_gbl_current_walk_list = prev_walk_list; - return_ACPI_STATUS (status); -} - - |