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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [acpi/] [dispatcher/] [dswexec.c] - Rev 1765
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/****************************************************************************** * * Module Name: dswexec - Dispatcher method execution callbacks; * dispatch to interpreter. * *****************************************************************************/ /* * Copyright (C) 2000 - 2004, 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_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; 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 currently must * be a number */ if (ACPI_GET_OBJECT_TYPE (obj_desc) != ACPI_TYPE_INTEGER) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Bad predicate (not a number) 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 (obj_desc); /* * Save the result of the predicate evaluation on * the control stack */ if (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 (obj_desc, walk_state)); /* * Delete the predicate result object (we know that * we don't need it anymore) */ 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; } /* 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"); /* * 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)) { 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); if (ACPI_FAILURE (status)) { break; } status = acpi_ds_result_stack_pop (walk_state); break; case AML_TYPE_METHOD_CALL: ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method invocation, Op=%p\n", op)); /* * (AML_METHODCALL) Op->Value->Arg->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; } /* * 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 ((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: 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); }