*****************************************************************************/
/*
- * 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")
-
-
-static u32 acpi_gbl_depth = 0;
-
+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
*
* PARAMETERS: parser_state - A parser state object
*
- * RETURN: Status
+ * RETURN: Next AML opcode
*
* DESCRIPTION: Get next AML opcode (without incrementing AML pointer)
*
******************************************************************************/
-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_EXTOP) {
- /* Extended opcode */
+ 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
* PARAMETERS: walk_state - Current State
* Op - Op to complete
*
- * RETURN: None.
+ * RETURN: Status
*
* DESCRIPTION: Perform any cleanup at the completion of an Op.
*
******************************************************************************/
-void
-acpi_ps_complete_this_op (
- struct acpi_walk_state *walk_state,
- union acpi_parse_object *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_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_VOID;
+ 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_VOID;
+ 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 cleanup;
+ goto allocate_error;
}
break;
* 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 cleanup;
+ goto allocate_error;
}
- }
-
- 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);
+ } 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 cleanup;
+ 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 cleanup;
+ goto allocate_error;
}
}
/* 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;
+ 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 */
- /* 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_VOID;
-}
+ allocate_error:
+ /* Always delete the subtree, even on error */
+
+ acpi_ps_delete_parse_tree(op);
+ return_ACPI_STATUS(AE_NO_MEMORY);
+}
/*******************************************************************************
*
* FUNCTION: acpi_ps_next_parse_state
*
- * PARAMETERS: parser_state - Current parser state object
+ * PARAMETERS: walk_state - Current state
+ * Op - Current parse op
+ * callback_status - Status from previous operation
*
* RETURN: Status
*
******************************************************************************/
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
- */
+ /* 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;
if ((callback_status & AE_CODE_MASK) == AE_CODE_CONTROL) {
status = AE_OK;
break;
}
- return_ACPI_STATUS (status);
+ return_ACPI_STATUS(status);
}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_ps_parse_loop
- *
- * PARAMETERS: parser_state - Current parser state object
- *
- * RETURN: Status
- *
- * DESCRIPTION: Parse AML (pointed to by the current parser state) and return
- * a tree of ops.
- *
- ******************************************************************************/
-
-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 == NULL) {
- 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;
-
- if (walk_state->arg_types) /* Are there any arguments that must be processed? */ {
- /* 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: start_scope - The starting point of the parse. Becomes the
- * root of the parsed op tree.
- * Aml - Pointer to the raw AML code to parse
- * aml_size - Length of the AML to parse
+ * PARAMETERS: walk_state - Current state
*
*
* RETURN: Status
*
******************************************************************************/
-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 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 ();
+ 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 a named
- * object, causing the second thread entrance to fail. We will workaround
- * this by marking the method permanently as Serialized.
+ * 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.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))) {
+ 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--;
+ } else {
+ ACPI_ERROR((AE_INFO,
+ "Invalid zero thread count in method"));
+ }
}
+
+ acpi_ds_terminate_control_method(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,
+ "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);
+ 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->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;
+ *(previous_walk_state->caller_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);
}
-
-
git://git.onelab.eu / linux-2.6.git / blobdiff