*****************************************************************************/
/*
- * Copyright (C) 2000 - 2005, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* 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
#include <acpi/acinterp.h>
#define _COMPONENT ACPI_PARSER
- ACPI_MODULE_NAME ("psparse")
-
+ACPI_MODULE_NAME("psparse")
/*******************************************************************************
*
* DESCRIPTION: Get the size of the current opcode.
*
******************************************************************************/
-
-u32
-acpi_ps_get_opcode_size (
- u32 opcode)
+u32 acpi_ps_get_opcode_size(u32 opcode)
{
/* Extended (2-byte) opcode if > 255 */
return (1);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ps_peek_opcode
*
******************************************************************************/
-u16
-acpi_ps_peek_opcode (
- struct acpi_parse_state *parser_state)
+u16 acpi_ps_peek_opcode(struct acpi_parse_state * parser_state)
{
- u8 *aml;
- u16 opcode;
-
+ u8 *aml;
+ u16 opcode;
aml = parser_state->aml;
- opcode = (u16) ACPI_GET8 (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));
+ opcode = (u16) ((opcode << 8) | ACPI_GET8(aml));
}
return (opcode);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ps_complete_this_op
******************************************************************************/
acpi_status
-acpi_ps_complete_this_op (
- struct acpi_walk_state *walk_state,
- union acpi_parse_object *op)
+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);
+ 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_ACPI_STATUS (AE_OK); /* OK for now */
+ 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);
+ 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);
+ parent_info =
+ acpi_ps_get_opcode_info(op->common.parent->common.
+ aml_opcode);
switch (parent_info->class) {
case AML_CLASS_CONTROL:
* 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);
+ replacement_op =
+ acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
if (!replacement_op) {
goto allocate_error;
}
* 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 ((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 allocate_error;
}
- }
- 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);
+ } 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) {
goto allocate_error;
}
- replacement_op->named.data = op->named.data;
- replacement_op->named.length = op->named.length;
+ 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);
+ replacement_op =
+ acpi_ps_alloc_op(AML_INT_RETURN_VALUE_OP);
if (!replacement_op) {
goto allocate_error;
}
/* 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;
+ 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;
+ 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;
}
- prev = next;
- }
}
-
-cleanup:
+ cleanup:
/* Now we can actually delete the subtree rooted at Op */
- acpi_ps_delete_parse_tree (op);
- return_ACPI_STATUS (AE_OK);
-
+ acpi_ps_delete_parse_tree(op);
+ return_ACPI_STATUS(AE_OK);
-allocate_error:
+ allocate_error:
/* Always delete the subtree, even on error */
- acpi_ps_delete_parse_tree (op);
- return_ACPI_STATUS (AE_NO_MEMORY);
+ acpi_ps_delete_parse_tree(op);
+ return_ACPI_STATUS(AE_NO_MEMORY);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ps_next_parse_state
******************************************************************************/
acpi_status
-acpi_ps_next_parse_state (
- struct acpi_walk_state *walk_state,
- union acpi_parse_object *op,
- acpi_status callback_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);
+ 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.
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;
+ status = acpi_ds_result_stack_pop(walk_state);
+ if (ACPI_SUCCESS(status)) {
+ status = AE_CTRL_BREAK;
+ }
break;
case AE_CTRL_CONTINUE:
-
parser_state->aml = walk_state->aml_last_while;
- status = AE_CTRL_CONTINUE;
+ status = acpi_ds_result_stack_pop(walk_state);
+ if (ACPI_SUCCESS(status)) {
+ status = AE_CTRL_CONTINUE;
+ }
break;
case AE_CTRL_PENDING:
#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);
+ parser_state->aml = acpi_ps_get_next_package_end(parser_state);
+ status = acpi_ds_result_stack_pop(walk_state);
+ if (ACPI_SUCCESS(status)) {
+ 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
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;
+ 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);
+ walk_state->return_used =
+ acpi_ds_is_result_used(op, walk_state);
break;
-
default:
status = callback_status;
break;
}
- return_ACPI_STATUS (status);
+ return_ACPI_STATUS(status);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ps_parse_aml
*
******************************************************************************/
-acpi_status
-acpi_ps_parse_aml (
- struct acpi_walk_state *walk_state)
+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_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 walk_state=%p Aml=%p size=%X\n",
- walk_state, walk_state->parser_state.aml,
- walk_state->parser_state.aml_size));
+ 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 ();
+ thread = acpi_ut_create_thread_state();
if (!thread) {
- return_ACPI_STATUS (AE_NO_MEMORY);
+ return_ACPI_STATUS(AE_NO_MEMORY);
}
walk_state->thread = thread;
- acpi_ds_push_walk_state (walk_state, thread);
+ acpi_ds_push_walk_state(walk_state, thread);
/*
* This global allows the AML debugger to get a handle to the currently
* 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));
+ ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "State=%p\n", walk_state));
status = AE_OK;
while (walk_state) {
- if (ACPI_SUCCESS (status)) {
+ if (ACPI_SUCCESS(status)) {
/*
* The parse_loop executes AML until the method terminates
* or calls another method.
*/
- status = acpi_ps_parse_loop (walk_state);
+ 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));
+ 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);
+ 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);
+ walk_state = acpi_ds_get_current_walk_state(thread);
continue;
- }
- else if (status == AE_CTRL_TERMINATE) {
+ } 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);
+ } 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.semaphore)) {
+ (!walk_state->method_desc->method.semaphore)) {
/*
- * This method is marked not_serialized, but it tried to create
+ * 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.
- * We will workaround this by marking the method permanently
+ * 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.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);
+ 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);
+ 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 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) {
- 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 */
- }
+ 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);
-
+ 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));
+ 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);
+ walk_state = acpi_ds_get_current_walk_state(thread);
if (walk_state) {
- if (ACPI_SUCCESS (status)) {
+ 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 {
+ 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);
+ acpi_ds_clear_implicit_return
+ (previous_walk_state);
- status = acpi_ds_restart_control_method (walk_state,
- previous_walk_state->return_desc);
+ 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;
+ if (ACPI_SUCCESS(status)) {
+ walk_state->walk_type |=
+ ACPI_WALK_METHOD_RESTART;
}
- }
- else {
+ } else {
/* On error, delete any return object */
- acpi_ut_remove_reference (previous_walk_state->return_desc);
+ acpi_ut_remove_reference(previous_walk_state->
+ return_desc);
}
}
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->implicit_return_obj;
+ } else {
+ /* NULL if no return value */
*(previous_walk_state->caller_return_desc) =
- previous_walk_state->return_desc;
+ previous_walk_state->return_desc;
}
- }
- else {
+ } else {
if (previous_walk_state->return_desc) {
+
/* Caller doesn't want it, must delete it */
- acpi_ut_remove_reference (previous_walk_state->return_desc);
+ 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_ut_remove_reference(previous_walk_state->
+ implicit_return_obj);
}
}
- acpi_ds_delete_walk_state (previous_walk_state);
+ 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_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);
+ return_ACPI_STATUS(status);
}
-
-
projects / powerpc.git / blobdiff