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Diffstat (limited to 'drivers/acpi/parser/psparse.c')
| -rw-r--r-- | drivers/acpi/parser/psparse.c | 688 |
1 files changed, 0 insertions, 688 deletions
diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c deleted file mode 100644 index 68e932f215ea..000000000000 --- a/drivers/acpi/parser/psparse.c +++ /dev/null @@ -1,688 +0,0 @@ -/****************************************************************************** - * - * Module Name: psparse - Parser top level AML parse routines - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, 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. - */ - -/* - * 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") - -/******************************************************************************* - * - * 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_EXTENDED_OP_PREFIX) { - - /* Extended opcode, get the second opcode byte */ - - 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: Status - * - * DESCRIPTION: Perform any cleanup at the completion of an Op. - * - ******************************************************************************/ - -acpi_status -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_status status = AE_OK; - - ACPI_FUNCTION_TRACE_PTR(ps_complete_this_op, op); - - /* Check for null Op, can happen if AML code is corrupt */ - - if (!op) { - return_ACPI_STATUS(AE_OK); /* OK for now */ - } - - /* 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_ACPI_STATUS(AE_OK); - } - - /* Make sure that we only delete this subtree */ - - if (op->common.parent) { - prev = op->common.parent->common.value.arg; - if (!prev) { - - /* Nothing more to do */ - - goto cleanup; - } - - /* - * 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) { - status = AE_NO_MEMORY; - } - 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_BANK_FIELD_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) { - status = AE_NO_MEMORY; - } - } else - if ((op->common.parent->common.aml_opcode == - AML_NAME_OP) - && (walk_state->pass_number <= - ACPI_IMODE_LOAD_PASS2)) { - 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) { - status = AE_NO_MEMORY; - } else { - 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) { - status = AE_NO_MEMORY; - } - } - - /* We must unlink this op from the parent tree */ - - 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_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * 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. - * - ******************************************************************************/ - -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); - status = AE_CTRL_PENDING; - 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_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; - 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 WalkState=%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) { - acpi_ds_delete_walk_state(walk_state); - return_ACPI_STATUS(AE_NO_MEMORY); - } - - walk_state->thread = thread; - - /* - * If executing a method, the starting sync_level is this method's - * sync_level - */ - if (walk_state->method_desc) { - walk_state->thread->current_sync_level = - walk_state->method_desc->method.sync_level; - } - - 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 (ACPI_FAILURE(status)) { - status = - acpi_ds_method_error(status, walk_state); - } - - /* - * 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)) { - - /* Either the method parse or actual execution failed */ - - ACPI_ERROR_METHOD("Method parse/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.mutex)) { - ACPI_INFO((AE_INFO, - "Marking method %4.4s as Serialized because of AE_ALREADY_EXISTS error", - walk_state->method_node->name. - ascii)); - - /* - * Method tried to create an object twice. The probable cause is - * that the method cannot handle reentrancy. - * - * The method is marked not_serialized, but it tried to create - * a named object, causing the second thread entrance to fail. - * Workaround this problem by marking the method permanently - * as Serialized. - */ - walk_state->method_desc->method.method_flags |= - AML_METHOD_SERIALIZED; - walk_state->method_desc->method.sync_level = 0; - } - } - - /* 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 or if we - * encountered an error during the method parse phase, there's lots of - * cleanup to do - */ - if (((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == - ACPI_PARSE_EXECUTE) || (ACPI_FAILURE(status))) { - acpi_ds_terminate_control_method(walk_state-> - method_desc, - walk_state); - } - - /* 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, - "ReturnValue=%p, ImplicitValue=%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) { - /* - * In slack mode execution, if there is no return value - * we should implicitly return zero (0) as a default value. - */ - if (acpi_gbl_enable_interpreter_slack && - !previous_walk_state-> - implicit_return_obj) { - previous_walk_state-> - implicit_return_obj = - acpi_ut_create_internal_object - (ACPI_TYPE_INTEGER); - if (!previous_walk_state-> - implicit_return_obj) { - return_ACPI_STATUS - (AE_NO_MEMORY); - } - - previous_walk_state-> - implicit_return_obj-> - integer.value = 0; - } - - /* Restart the calling control method */ - - 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 or implicit return */ - - acpi_ut_remove_reference(previous_walk_state-> - return_desc); - acpi_ds_clear_implicit_return - (previous_walk_state); - } - } - - /* - * 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); -} |