diff options
Diffstat (limited to 'drivers/acpi/dispatcher/dswexec.c')
| -rw-r--r-- | drivers/acpi/dispatcher/dswexec.c | 751 |
1 files changed, 751 insertions, 0 deletions
diff --git a/drivers/acpi/dispatcher/dswexec.c b/drivers/acpi/dispatcher/dswexec.c new file mode 100644 index 000000000000..2071a0d2bbbb --- /dev/null +++ b/drivers/acpi/dispatcher/dswexec.c @@ -0,0 +1,751 @@ +/****************************************************************************** + * + * Module Name: dswexec - Dispatcher method execution callbacks; + * dispatch to interpreter. + * + *****************************************************************************/ + +/* + * 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. + */ + + +#include <acpi/acpi.h> +#include <acpi/acparser.h> +#include <acpi/amlcode.h> +#include <acpi/acdispat.h> +#include <acpi/acinterp.h> +#include <acpi/acnamesp.h> +#include <acpi/acdebug.h> +#include <acpi/acdisasm.h> + + +#define _COMPONENT ACPI_DISPATCHER + ACPI_MODULE_NAME ("dswexec") + +/* + * Dispatch table for opcode classes + */ +static ACPI_EXECUTE_OP acpi_gbl_op_type_dispatch [] = { + acpi_ex_opcode_0A_0T_1R, + acpi_ex_opcode_1A_0T_0R, + acpi_ex_opcode_1A_0T_1R, + acpi_ex_opcode_1A_1T_0R, + acpi_ex_opcode_1A_1T_1R, + acpi_ex_opcode_2A_0T_0R, + acpi_ex_opcode_2A_0T_1R, + acpi_ex_opcode_2A_1T_1R, + acpi_ex_opcode_2A_2T_1R, + acpi_ex_opcode_3A_0T_0R, + acpi_ex_opcode_3A_1T_1R, + acpi_ex_opcode_6A_0T_1R}; + +/***************************************************************************** + * + * FUNCTION: acpi_ds_get_predicate_value + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * + * RETURN: Status + * + * DESCRIPTION: Get the result of a predicate evaluation + * + ****************************************************************************/ + +acpi_status +acpi_ds_get_predicate_value ( + struct acpi_walk_state *walk_state, + union acpi_operand_object *result_obj) { + acpi_status status = AE_OK; + union acpi_operand_object *obj_desc; + union acpi_operand_object *local_obj_desc = NULL; + + + ACPI_FUNCTION_TRACE_PTR ("ds_get_predicate_value", walk_state); + + + walk_state->control_state->common.state = 0; + + if (result_obj) { + status = acpi_ds_result_pop (&obj_desc, walk_state); + if (ACPI_FAILURE (status)) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Could not get result from predicate evaluation, %s\n", + acpi_format_exception (status))); + + return_ACPI_STATUS (status); + } + } + else { + status = acpi_ds_create_operand (walk_state, walk_state->op, 0); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + status = acpi_ex_resolve_to_value (&walk_state->operands [0], walk_state); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + obj_desc = walk_state->operands [0]; + } + + if (!obj_desc) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No predicate obj_desc=%p State=%p\n", + obj_desc, walk_state)); + + return_ACPI_STATUS (AE_AML_NO_OPERAND); + } + + /* + * Result of predicate evaluation must be an Integer + * object. Implicitly convert the argument if necessary. + */ + status = acpi_ex_convert_to_integer (obj_desc, &local_obj_desc, 16); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + if (ACPI_GET_OBJECT_TYPE (local_obj_desc) != ACPI_TYPE_INTEGER) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Bad predicate (not an integer) obj_desc=%p State=%p Type=%X\n", + obj_desc, walk_state, ACPI_GET_OBJECT_TYPE (obj_desc))); + + status = AE_AML_OPERAND_TYPE; + goto cleanup; + } + + /* Truncate the predicate to 32-bits if necessary */ + + acpi_ex_truncate_for32bit_table (local_obj_desc); + + /* + * Save the result of the predicate evaluation on + * the control stack + */ + if (local_obj_desc->integer.value) { + walk_state->control_state->common.value = TRUE; + } + else { + /* + * Predicate is FALSE, we will just toss the + * rest of the package + */ + walk_state->control_state->common.value = FALSE; + status = AE_CTRL_FALSE; + } + + +cleanup: + + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n", + walk_state->control_state->common.value, walk_state->op)); + + /* Break to debugger to display result */ + + ACPI_DEBUGGER_EXEC (acpi_db_display_result_object (local_obj_desc, walk_state)); + + /* + * Delete the predicate result object (we know that + * we don't need it anymore) + */ + if (local_obj_desc != obj_desc) { + acpi_ut_remove_reference (local_obj_desc); + } + acpi_ut_remove_reference (obj_desc); + + walk_state->control_state->common.state = ACPI_CONTROL_NORMAL; + return_ACPI_STATUS (status); +} + + +/***************************************************************************** + * + * FUNCTION: acpi_ds_exec_begin_op + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * out_op - Return op if a new one is created + * + * RETURN: Status + * + * DESCRIPTION: Descending callback used during the execution of control + * methods. This is where most operators and operands are + * dispatched to the interpreter. + * + ****************************************************************************/ + +acpi_status +acpi_ds_exec_begin_op ( + struct acpi_walk_state *walk_state, + union acpi_parse_object **out_op) +{ + union acpi_parse_object *op; + acpi_status status = AE_OK; + u32 opcode_class; + + + ACPI_FUNCTION_TRACE_PTR ("ds_exec_begin_op", walk_state); + + + op = walk_state->op; + if (!op) { + status = acpi_ds_load2_begin_op (walk_state, out_op); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + op = *out_op; + walk_state->op = op; + walk_state->opcode = op->common.aml_opcode; + walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode); + + if (acpi_ns_opens_scope (walk_state->op_info->object_type)) { + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n", + acpi_ut_get_type_name (walk_state->op_info->object_type), op)); + + status = acpi_ds_scope_stack_pop (walk_state); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + } + + if (op == walk_state->origin) { + if (out_op) { + *out_op = op; + } + + return_ACPI_STATUS (AE_OK); + } + + /* + * If the previous opcode was a conditional, this opcode + * must be the beginning of the associated predicate. + * Save this knowledge in the current scope descriptor + */ + if ((walk_state->control_state) && + (walk_state->control_state->common.state == + ACPI_CONTROL_CONDITIONAL_EXECUTING)) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Exec predicate Op=%p State=%p\n", + op, walk_state)); + + walk_state->control_state->common.state = ACPI_CONTROL_PREDICATE_EXECUTING; + + /* Save start of predicate */ + + walk_state->control_state->control.predicate_op = op; + } + + + opcode_class = walk_state->op_info->class; + + /* We want to send namepaths to the load code */ + + if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { + opcode_class = AML_CLASS_NAMED_OBJECT; + } + + /* + * Handle the opcode based upon the opcode type + */ + switch (opcode_class) { + case AML_CLASS_CONTROL: + + status = acpi_ds_result_stack_push (walk_state); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + status = acpi_ds_exec_begin_control_op (walk_state, op); + break; + + + case AML_CLASS_NAMED_OBJECT: + + if (walk_state->walk_type == ACPI_WALK_METHOD) { + /* + * Found a named object declaration during method + * execution; we must enter this object into the + * namespace. The created object is temporary and + * will be deleted upon completion of the execution + * of this method. + */ + status = acpi_ds_load2_begin_op (walk_state, NULL); + } + + if (op->common.aml_opcode == AML_REGION_OP) { + status = acpi_ds_result_stack_push (walk_state); + } + break; + + + case AML_CLASS_EXECUTE: + case AML_CLASS_CREATE: + + /* + * Most operators with arguments. + * Start a new result/operand state + */ + status = acpi_ds_result_stack_push (walk_state); + break; + + + default: + break; + } + + /* Nothing to do here during method execution */ + + return_ACPI_STATUS (status); +} + + +/***************************************************************************** + * + * FUNCTION: acpi_ds_exec_end_op + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * Op - Op that has been just been completed in the + * walk; Arguments have now been evaluated. + * + * RETURN: Status + * + * DESCRIPTION: Ascending callback used during the execution of control + * methods. The only thing we really need to do here is to + * notice the beginning of IF, ELSE, and WHILE blocks. + * + ****************************************************************************/ + +acpi_status +acpi_ds_exec_end_op ( + struct acpi_walk_state *walk_state) +{ + union acpi_parse_object *op; + acpi_status status = AE_OK; + u32 op_type; + u32 op_class; + union acpi_parse_object *next_op; + union acpi_parse_object *first_arg; + + + ACPI_FUNCTION_TRACE_PTR ("ds_exec_end_op", walk_state); + + + op = walk_state->op; + op_type = walk_state->op_info->type; + op_class = walk_state->op_info->class; + + if (op_class == AML_CLASS_UNKNOWN) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown opcode %X\n", op->common.aml_opcode)); + return_ACPI_STATUS (AE_NOT_IMPLEMENTED); + } + + first_arg = op->common.value.arg; + + /* Init the walk state */ + + walk_state->num_operands = 0; + walk_state->return_desc = NULL; + walk_state->result_obj = NULL; + + /* Call debugger for single step support (DEBUG build only) */ + + ACPI_DEBUGGER_EXEC (status = acpi_db_single_step (walk_state, op, op_class)); + ACPI_DEBUGGER_EXEC (if (ACPI_FAILURE (status)) {return_ACPI_STATUS (status);}); + + /* Decode the Opcode Class */ + + switch (op_class) { + case AML_CLASS_ARGUMENT: /* constants, literals, etc. -- do nothing */ + break; + + + case AML_CLASS_EXECUTE: /* most operators with arguments */ + + /* Build resolved operand stack */ + + status = acpi_ds_create_operands (walk_state, first_arg); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + /* Done with this result state (Now that operand stack is built) */ + + status = acpi_ds_result_stack_pop (walk_state); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + /* + * All opcodes require operand resolution, with the only exceptions + * being the object_type and size_of operators. + */ + if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) { + /* Resolve all operands */ + + status = acpi_ex_resolve_operands (walk_state->opcode, + &(walk_state->operands [walk_state->num_operands -1]), + walk_state); + if (ACPI_SUCCESS (status)) { + ACPI_DUMP_OPERANDS (ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, + acpi_ps_get_opcode_name (walk_state->opcode), + walk_state->num_operands, "after ex_resolve_operands"); + } + } + + if (ACPI_SUCCESS (status)) { + /* + * Dispatch the request to the appropriate interpreter handler + * routine. There is one routine per opcode "type" based upon the + * number of opcode arguments and return type. + */ + status = acpi_gbl_op_type_dispatch[op_type] (walk_state); + } + else { + /* + * Treat constructs of the form "Store(local_x,local_x)" as noops when the + * Local is uninitialized. + */ + if ((status == AE_AML_UNINITIALIZED_LOCAL) && + (walk_state->opcode == AML_STORE_OP) && + (walk_state->operands[0]->common.type == ACPI_TYPE_LOCAL_REFERENCE) && + (walk_state->operands[1]->common.type == ACPI_TYPE_LOCAL_REFERENCE) && + (walk_state->operands[0]->reference.opcode == + walk_state->operands[1]->reference.opcode) && + (walk_state->operands[0]->reference.offset == + walk_state->operands[1]->reference.offset)) { + status = AE_OK; + } + else { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "[%s]: Could not resolve operands, %s\n", + acpi_ps_get_opcode_name (walk_state->opcode), + acpi_format_exception (status))); + } + } + + /* Always delete the argument objects and clear the operand stack */ + + acpi_ds_clear_operands (walk_state); + + /* + * If a result object was returned from above, push it on the + * current result stack + */ + if (ACPI_SUCCESS (status) && + walk_state->result_obj) { + status = acpi_ds_result_push (walk_state->result_obj, walk_state); + } + + break; + + + default: + + switch (op_type) { + case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */ + + /* 1 Operand, 0 external_result, 0 internal_result */ + + status = acpi_ds_exec_end_control_op (walk_state, op); + + /* Make sure to properly pop the result stack */ + + if (ACPI_SUCCESS (status)) { + status = acpi_ds_result_stack_pop (walk_state); + } + else if (status == AE_CTRL_PENDING) { + status = acpi_ds_result_stack_pop (walk_state); + if (ACPI_SUCCESS (status)) { + status = AE_CTRL_PENDING; + } + } + break; + + + case AML_TYPE_METHOD_CALL: + + /* + * If the method is referenced from within a package + * declaration, it is not a invocation of the method, just + * a reference to it. + */ + if ((op->asl.parent) && + ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP) || + (op->asl.parent->asl.aml_opcode == AML_VAR_PACKAGE_OP))) { + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method Reference in a Package, Op=%p\n", op)); + op->common.node = (struct acpi_namespace_node *) op->asl.value.arg->asl.node->object; + acpi_ut_add_reference (op->asl.value.arg->asl.node->object); + return_ACPI_STATUS (AE_OK); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method invocation, Op=%p\n", op)); + + /* + * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains + * the method Node pointer + */ + /* next_op points to the op that holds the method name */ + + next_op = first_arg; + + /* next_op points to first argument op */ + + next_op = next_op->common.next; + + /* + * Get the method's arguments and put them on the operand stack + */ + status = acpi_ds_create_operands (walk_state, next_op); + if (ACPI_FAILURE (status)) { + break; + } + + /* + * Since the operands will be passed to another control method, + * we must resolve all local references here (Local variables, + * arguments to *this* method, etc.) + */ + status = acpi_ds_resolve_operands (walk_state); + if (ACPI_FAILURE (status)) { + /* On error, clear all resolved operands */ + + acpi_ds_clear_operands (walk_state); + break; + } + + /* + * Tell the walk loop to preempt this running method and + * execute the new method + */ + status = AE_CTRL_TRANSFER; + + /* + * Return now; we don't want to disturb anything, + * especially the operand count! + */ + return_ACPI_STATUS (status); + + + case AML_TYPE_CREATE_FIELD: + + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, + "Executing create_field Buffer/Index Op=%p\n", op)); + + status = acpi_ds_load2_end_op (walk_state); + if (ACPI_FAILURE (status)) { + break; + } + + status = acpi_ds_eval_buffer_field_operands (walk_state, op); + break; + + + case AML_TYPE_CREATE_OBJECT: + + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, + "Executing create_object (Buffer/Package) Op=%p\n", op)); + + switch (op->common.parent->common.aml_opcode) { + case AML_NAME_OP: + + /* + * Put the Node on the object stack (Contains the ACPI Name of + * this object) + */ + walk_state->operands[0] = (void *) op->common.parent->common.node; + walk_state->num_operands = 1; + + status = acpi_ds_create_node (walk_state, op->common.parent->common.node, op->common.parent); + if (ACPI_FAILURE (status)) { + break; + } + + /* Fall through */ + /*lint -fallthrough */ + + case AML_INT_EVAL_SUBTREE_OP: + + status = acpi_ds_eval_data_object_operands (walk_state, op, + acpi_ns_get_attached_object (op->common.parent->common.node)); + break; + + default: + + status = acpi_ds_eval_data_object_operands (walk_state, op, NULL); + break; + } + + /* Done with this result state (Now that operand stack is built) */ + + status = acpi_ds_result_stack_pop (walk_state); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + /* + * If a result object was returned from above, push it on the + * current result stack + */ + if (ACPI_SUCCESS (status) && + walk_state->result_obj) { + status = acpi_ds_result_push (walk_state->result_obj, walk_state); + } + break; + + + case AML_TYPE_NAMED_FIELD: + case AML_TYPE_NAMED_COMPLEX: + case AML_TYPE_NAMED_SIMPLE: + case AML_TYPE_NAMED_NO_OBJ: + + status = acpi_ds_load2_end_op (walk_state); + if (ACPI_FAILURE (status)) { + break; + } + + if (op->common.aml_opcode == AML_REGION_OP) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, + "Executing op_region Address/Length Op=%p\n", op)); + + status = acpi_ds_eval_region_operands (walk_state, op); + if (ACPI_FAILURE (status)) { + break; + } + + status = acpi_ds_result_stack_pop (walk_state); + } + + break; + + + case AML_TYPE_UNDEFINED: + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Undefined opcode type Op=%p\n", op)); + return_ACPI_STATUS (AE_NOT_IMPLEMENTED); + + + case AML_TYPE_BOGUS: + + ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, + "Internal opcode=%X type Op=%p\n", + walk_state->opcode, op)); + break; + + + default: + + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p\n", + op_class, op_type, op->common.aml_opcode, op)); + + status = AE_NOT_IMPLEMENTED; + break; + } + } + + /* + * ACPI 2.0 support for 64-bit integers: Truncate numeric + * result value if we are executing from a 32-bit ACPI table + */ + acpi_ex_truncate_for32bit_table (walk_state->result_obj); + + /* + * Check if we just completed the evaluation of a + * conditional predicate + */ + + if ((ACPI_SUCCESS (status)) && + (walk_state->control_state) && + (walk_state->control_state->common.state == + ACPI_CONTROL_PREDICATE_EXECUTING) && + (walk_state->control_state->control.predicate_op == op)) { + status = acpi_ds_get_predicate_value (walk_state, walk_state->result_obj); + walk_state->result_obj = NULL; + } + + +cleanup: + + /* Invoke exception handler on error */ + + if (ACPI_FAILURE (status) && + acpi_gbl_exception_handler && + !(status & AE_CODE_CONTROL)) { + acpi_ex_exit_interpreter (); + status = acpi_gbl_exception_handler (status, + walk_state->method_node->name.integer, walk_state->opcode, + walk_state->aml_offset, NULL); + acpi_ex_enter_interpreter (); + } + + if (walk_state->result_obj) { + /* Break to debugger to display result */ + + ACPI_DEBUGGER_EXEC (acpi_db_display_result_object (walk_state->result_obj, walk_state)); + + /* + * Delete the result op if and only if: + * Parent will not use the result -- such as any + * non-nested type2 op in a method (parent will be method) + */ + acpi_ds_delete_result_if_not_used (op, walk_state->result_obj, walk_state); + } + +#ifdef _UNDER_DEVELOPMENT + + if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) { + acpi_db_method_end (walk_state); + } +#endif + + /* Always clear the object stack */ + + walk_state->num_operands = 0; + +#ifdef ACPI_DISASSEMBLER + + /* On error, display method locals/args */ + + if (ACPI_FAILURE (status)) { + acpi_dm_dump_method_info (status, walk_state, op); + } +#endif + + return_ACPI_STATUS (status); +} + + |