Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/acpi/parser/psparse.c b/drivers/acpi/parser/psparse.c
new file mode 100644
index 0000000..e79edb5
--- /dev/null
+++ b/drivers/acpi/parser/psparse.c
@@ -0,0 +1,1266 @@
+/******************************************************************************
+ *
+ * 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;
+
+
+/*******************************************************************************
+ *
+ * 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: Status
+ *
+ * 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.
+ *
+ ******************************************************************************/
+
+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: parser_state - Current parser state object
+ *
+ * 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);
+ 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: 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
+ *
+ *
+ * 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);
+}
+
+