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https://github.com/torvalds/linux
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268 lines
7.9 KiB
C
268 lines
7.9 KiB
C
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/******************************************************************************
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*
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* Module Name: exoparg3 - AML execution - opcodes with 3 arguments
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acinterp.h>
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#include <acpi/acparser.h>
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#include <acpi/amlcode.h>
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exoparg3")
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/*!
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* Naming convention for AML interpreter execution routines.
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*
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* The routines that begin execution of AML opcodes are named with a common
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* convention based upon the number of arguments, the number of target operands,
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* and whether or not a value is returned:
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*
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* AcpiExOpcode_xA_yT_zR
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*
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* Where:
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*
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* xA - ARGUMENTS: The number of arguments (input operands) that are
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* required for this opcode type (1 through 6 args).
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* yT - TARGETS: The number of targets (output operands) that are required
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* for this opcode type (0, 1, or 2 targets).
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* zR - RETURN VALUE: Indicates whether this opcode type returns a value
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* as the function return (0 or 1).
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*
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* The AcpiExOpcode* functions are called via the Dispatcher component with
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* fully resolved operands.
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!*/
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_3A_0T_0R
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute Triadic operator (3 operands)
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*
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******************************************************************************/
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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];
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struct acpi_signal_fatal_info *fatal;
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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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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"fatal_op: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
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(u32) operand[0]->integer.value,
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(u32) operand[1]->integer.value,
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(u32) operand[2]->integer.value));
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fatal =
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ACPI_MEM_ALLOCATE(sizeof(struct acpi_signal_fatal_info));
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if (fatal) {
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fatal->type = (u32) operand[0]->integer.value;
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fatal->code = (u32) operand[1]->integer.value;
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fatal->argument = (u32) operand[2]->integer.value;
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}
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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_MEM_FREE(fatal);
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break;
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default:
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ACPI_REPORT_ERROR(("acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n", walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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goto cleanup;
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}
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cleanup:
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_3A_1T_1R
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute Triadic operator (3 operands)
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*
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******************************************************************************/
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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];
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union acpi_operand_object *return_desc = NULL;
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char *buffer = NULL;
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acpi_status status = AE_OK;
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acpi_integer index;
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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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/*
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* Create the return object. The Source operand is guaranteed to be
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* either a String or a Buffer, so just use its type.
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*/
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return_desc =
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acpi_ut_create_internal_object(ACPI_GET_OBJECT_TYPE
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(operand[0]));
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* 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;
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/*
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* If the index is beyond the length of the String/Buffer, or if the
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* requested length is zero, return a zero-length String/Buffer
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*/
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if (index >= operand[0]->string.length) {
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length = 0;
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}
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/* Truncate request if larger than the actual String/Buffer */
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else if ((index + length) > operand[0]->string.length) {
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length = (acpi_size) operand[0]->string.length -
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(acpi_size) index;
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}
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/* Strings always have a sub-pointer, not so for buffers */
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switch (ACPI_GET_OBJECT_TYPE(operand[0])) {
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case ACPI_TYPE_STRING:
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/* Always allocate a new buffer for the String */
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buffer = ACPI_MEM_CALLOCATE((acpi_size) length + 1);
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if (!buffer) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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break;
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case ACPI_TYPE_BUFFER:
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/* If the requested length is zero, don't allocate a buffer */
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if (length > 0) {
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/* Allocate a new buffer for the Buffer */
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buffer = ACPI_MEM_CALLOCATE(length);
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if (!buffer) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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}
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break;
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default: /* Should not happen */
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status = AE_AML_OPERAND_TYPE;
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goto cleanup;
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}
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if (length > 0) {
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/* Copy the portion requested */
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ACPI_MEMCPY(buffer, operand[0]->string.pointer + index,
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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;
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return_desc->string.length = (u32) length;
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/* Mark buffer initialized */
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return_desc->buffer.flags |= AOPOBJ_DATA_VALID;
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break;
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default:
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ACPI_REPORT_ERROR(("acpi_ex_opcode_3A_0T_0R: Unknown opcode %X\n", walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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goto cleanup;
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}
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/* Store the result in the target */
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status = acpi_ex_store(return_desc, operand[3], walk_state);
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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) {
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acpi_ut_remove_reference(return_desc);
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}
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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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}
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return_ACPI_STATUS(status);
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}
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