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drivers/acpi/acpica/exoparg3.c
7.86 KB
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/****************************************************************************** * * Module Name: exoparg3 - AML execution - opcodes with 3 arguments * *****************************************************************************/ /* |
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* Copyright (C) 2000 - 2008, Intel Corp. |
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* 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. */ |
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#include <acpi/acpi.h> |
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#include "accommon.h" #include "acinterp.h" #include "acparser.h" #include "amlcode.h" |
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#define _COMPONENT ACPI_EXECUTER |
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ACPI_MODULE_NAME("exoparg3") |
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/*! * Naming convention for AML interpreter execution routines. * * The routines that begin execution of AML opcodes are named with a common * convention based upon the number of arguments, the number of target operands, * and whether or not a value is returned: * * AcpiExOpcode_xA_yT_zR * * Where: * * xA - ARGUMENTS: The number of arguments (input operands) that are * required for this opcode type (1 through 6 args). * yT - TARGETS: The number of targets (output operands) that are required * for this opcode type (0, 1, or 2 targets). * zR - RETURN VALUE: Indicates whether this opcode type returns a value * as the function return (0 or 1). * * The AcpiExOpcode* functions are called via the Dispatcher component with * fully resolved operands. !*/ |
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/******************************************************************************* * * FUNCTION: acpi_ex_opcode_3A_0T_0R * * PARAMETERS: walk_state - Current walk state * * RETURN: Status * * DESCRIPTION: Execute Triadic operator (3 operands) * ******************************************************************************/ |
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acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state) |
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{ |
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union acpi_operand_object **operand = &walk_state->operands[0]; struct acpi_signal_fatal_info *fatal; acpi_status status = AE_OK; |
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ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_0T_0R, |
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acpi_ps_get_opcode_name(walk_state->opcode)); |
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switch (walk_state->opcode) { |
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case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */ |
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|
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
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"FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< ", |
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(u32) operand[0]->integer.value, (u32) operand[1]->integer.value, (u32) operand[2]->integer.value)); |
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fatal = ACPI_ALLOCATE(sizeof(struct acpi_signal_fatal_info)); |
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if (fatal) { |
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fatal->type = (u32) operand[0]->integer.value; fatal->code = (u32) operand[1]->integer.value; |
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fatal->argument = (u32) operand[2]->integer.value; } |
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/* Always signal the OS! */ |
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status = acpi_os_signal(ACPI_SIGNAL_FATAL, fatal); |
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/* Might return while OS is shutting down, just continue */ |
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ACPI_FREE(fatal); |
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break; |
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default: |
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ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", walk_state->opcode)); |
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status = AE_AML_BAD_OPCODE; goto cleanup; } |
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cleanup: |
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|
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return_ACPI_STATUS(status); |
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} |
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/******************************************************************************* * * FUNCTION: acpi_ex_opcode_3A_1T_1R * * PARAMETERS: walk_state - Current walk state * * RETURN: Status * * DESCRIPTION: Execute Triadic operator (3 operands) * ******************************************************************************/ |
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acpi_status acpi_ex_opcode_3A_1T_1R(struct acpi_walk_state *walk_state) |
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{ |
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union acpi_operand_object **operand = &walk_state->operands[0]; union acpi_operand_object *return_desc = NULL; char *buffer = NULL; acpi_status status = AE_OK; acpi_integer index; acpi_size length; |
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ACPI_FUNCTION_TRACE_STR(ex_opcode_3A_1T_1R, |
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acpi_ps_get_opcode_name(walk_state->opcode)); |
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switch (walk_state->opcode) { |
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case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */ |
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/* * Create the return object. The Source operand is guaranteed to be * either a String or a Buffer, so just use its type. */ |
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return_desc = acpi_ut_create_internal_object((operand[0])-> common.type); |
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if (!return_desc) { status = AE_NO_MEMORY; goto cleanup; } /* Get the Integer values from the objects */ |
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index = operand[1]->integer.value; |
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length = (acpi_size) operand[2]->integer.value; /* * If the index is beyond the length of the String/Buffer, or if the * requested length is zero, return a zero-length String/Buffer */ |
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if (index >= operand[0]->string.length) { length = 0; } /* Truncate request if larger than the actual String/Buffer */ else if ((index + length) > operand[0]->string.length) { length = (acpi_size) operand[0]->string.length - |
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(acpi_size) index; |
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} |
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|
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/* Strings always have a sub-pointer, not so for buffers */ |
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switch ((operand[0])->common.type) { |
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case ACPI_TYPE_STRING: /* Always allocate a new buffer for the String */ |
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|
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buffer = ACPI_ALLOCATE_ZEROED((acpi_size) length + 1); |
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if (!buffer) { status = AE_NO_MEMORY; goto cleanup; } |
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break; case ACPI_TYPE_BUFFER: /* If the requested length is zero, don't allocate a buffer */ if (length > 0) { |
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/* Allocate a new buffer for the Buffer */ |
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buffer = ACPI_ALLOCATE_ZEROED(length); |
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if (!buffer) { status = AE_NO_MEMORY; goto cleanup; } } break; |
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|
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default: /* Should not happen */ |
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status = AE_AML_OPERAND_TYPE; goto cleanup; } |
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if (buffer) { |
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/* We have a buffer, copy the portion requested */ |
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|
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ACPI_MEMCPY(buffer, operand[0]->string.pointer + index, length); |
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} |
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/* Set the length of the new String/Buffer */ |
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return_desc->string.pointer = buffer; return_desc->string.length = (u32) length; |
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/* Mark buffer initialized */ return_desc->buffer.flags |= AOPOBJ_DATA_VALID; break; |
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default: |
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ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", walk_state->opcode)); |
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status = AE_AML_BAD_OPCODE; goto cleanup; } /* Store the result in the target */ |
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status = acpi_ex_store(return_desc, operand[3], walk_state); |
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|
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cleanup: |
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/* Delete return object on error */ |
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if (ACPI_FAILURE(status) || walk_state->result_obj) { acpi_ut_remove_reference(return_desc); |
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walk_state->result_obj = NULL; |
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} /* Set the return object and exit */ |
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else { |
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walk_state->result_obj = return_desc; } |
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return_ACPI_STATUS(status); |
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} |