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Diffstat (limited to 'drivers/acpi/executer/exoparg3.c')
| -rw-r--r-- | drivers/acpi/executer/exoparg3.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/drivers/acpi/executer/exoparg3.c b/drivers/acpi/executer/exoparg3.c new file mode 100644 index 000000000000..29d0b167745d --- /dev/null +++ b/drivers/acpi/executer/exoparg3.c @@ -0,0 +1,256 @@ + +/****************************************************************************** + * + * Module Name: exoparg3 - AML execution - opcodes with 3 arguments + * + *****************************************************************************/ + +/* + * 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/acinterp.h> +#include <acpi/acparser.h> +#include <acpi/amlcode.h> + + +#define _COMPONENT ACPI_EXECUTER + ACPI_MODULE_NAME ("exoparg3") + + +/*! + * 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. +!*/ + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_opcode_3A_0T_0R + * + * PARAMETERS: walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Execute Triadic operator (3 operands) + * + ******************************************************************************/ + +acpi_status +acpi_ex_opcode_3A_0T_0R ( + struct acpi_walk_state *walk_state) +{ + union acpi_operand_object **operand = &walk_state->operands[0]; + struct acpi_signal_fatal_info *fatal; + acpi_status status = AE_OK; + + + ACPI_FUNCTION_TRACE_STR ("ex_opcode_3A_0T_0R", acpi_ps_get_opcode_name (walk_state->opcode)); + + + switch (walk_state->opcode) { + case AML_FATAL_OP: /* Fatal (fatal_type fatal_code fatal_arg) */ + + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, + "fatal_op: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n", + (u32) operand[0]->integer.value, + (u32) operand[1]->integer.value, + (u32) operand[2]->integer.value)); + + fatal = ACPI_MEM_ALLOCATE (sizeof (struct acpi_signal_fatal_info)); + if (fatal) { + fatal->type = (u32) operand[0]->integer.value; + fatal->code = (u32) operand[1]->integer.value; + fatal->argument = (u32) operand[2]->integer.value; + } + + /* + * Always signal the OS! + */ + status = acpi_os_signal (ACPI_SIGNAL_FATAL, fatal); + + /* Might return while OS is shutting down, just continue */ + + ACPI_MEM_FREE (fatal); + break; + + + default: + + ACPI_REPORT_ERROR (("acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n", + walk_state->opcode)); + status = AE_AML_BAD_OPCODE; + goto cleanup; + } + + +cleanup: + + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_opcode_3A_1T_1R + * + * PARAMETERS: walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Execute Triadic operator (3 operands) + * + ******************************************************************************/ + +acpi_status +acpi_ex_opcode_3A_1T_1R ( + struct acpi_walk_state *walk_state) +{ + union acpi_operand_object **operand = &walk_state->operands[0]; + union acpi_operand_object *return_desc = NULL; + char *buffer; + acpi_status status = AE_OK; + acpi_native_uint index; + acpi_size length; + + + ACPI_FUNCTION_TRACE_STR ("ex_opcode_3A_1T_1R", acpi_ps_get_opcode_name (walk_state->opcode)); + + + switch (walk_state->opcode) { + case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */ + + /* + * Create the return object. The Source operand is guaranteed to be + * either a String or a Buffer, so just use its type. + */ + return_desc = acpi_ut_create_internal_object (ACPI_GET_OBJECT_TYPE (operand[0])); + if (!return_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Get the Integer values from the objects */ + + index = (acpi_native_uint) operand[1]->integer.value; + 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 + */ + if ((index < operand[0]->string.length) && + (length > 0)) { + /* Truncate request if larger than the actual String/Buffer */ + + if ((index + length) > + operand[0]->string.length) { + length = (acpi_size) operand[0]->string.length - index; + } + + /* Allocate a new buffer for the String/Buffer */ + + buffer = ACPI_MEM_CALLOCATE ((acpi_size) length + 1); + if (!buffer) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Copy the portion requested */ + + ACPI_MEMCPY (buffer, operand[0]->string.pointer + index, + length); + + /* Set the length of the new String/Buffer */ + + return_desc->string.pointer = buffer; + return_desc->string.length = (u32) length; + } + + /* Mark buffer initialized */ + + return_desc->buffer.flags |= AOPOBJ_DATA_VALID; + break; + + + default: + + ACPI_REPORT_ERROR (("acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n", + walk_state->opcode)); + status = AE_AML_BAD_OPCODE; + goto cleanup; + } + + /* Store the result in the target */ + + status = acpi_ex_store (return_desc, operand[3], walk_state); + +cleanup: + + /* Delete return object on error */ + + if (ACPI_FAILURE (status)) { + acpi_ut_remove_reference (return_desc); + } + + /* Set the return object and exit */ + + if (!walk_state->result_obj) { + walk_state->result_obj = return_desc; + } + return_ACPI_STATUS (status); +} + + |