diff options
Diffstat (limited to 'drivers/acpi/acpica/exoparg3.c')
| -rw-r--r-- | drivers/acpi/acpica/exoparg3.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/exoparg3.c b/drivers/acpi/acpica/exoparg3.c new file mode 100644 index 000000000..1c64a988c --- /dev/null +++ b/drivers/acpi/acpica/exoparg3.c @@ -0,0 +1,281 @@ +/****************************************************************************** + * + * Module Name: exoparg3 - AML execution - opcodes with 3 arguments + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2015, Intel Corp. + * 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 "accommon.h" +#include "acinterp.h" +#include "acparser.h" +#include "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, + "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n", + (u32) operand[0]->integer.value, + (u32) operand[1]->integer.value, + (u32) operand[2]->integer.value)); + + fatal = ACPI_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_FREE(fatal); + goto cleanup; + + case AML_EXTERNAL_OP: + /* + * If the interpreter sees this opcode, just ignore it. The External + * op is intended for use by disassemblers in order to properly + * disassemble control method invocations. The opcode or group of + * opcodes should be surrounded by an "if (0)" clause to ensure that + * AML interpreters never see the opcode. + */ + status = AE_OK; + goto cleanup; + + default: + + ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", + 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 = NULL; + acpi_status status = AE_OK; + u64 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((operand[0])-> + common.type); + if (!return_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Get the Integer values from the objects */ + + index = 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 */ + + else if ((index + length) > operand[0]->string.length) { + length = (acpi_size) operand[0]->string.length - + (acpi_size) index; + } + + /* Strings always have a sub-pointer, not so for buffers */ + + switch ((operand[0])->common.type) { + case ACPI_TYPE_STRING: + + /* Always allocate a new buffer for the String */ + + buffer = ACPI_ALLOCATE_ZEROED((acpi_size) length + 1); + if (!buffer) { + status = AE_NO_MEMORY; + goto cleanup; + } + break; + + case ACPI_TYPE_BUFFER: + + /* If the requested length is zero, don't allocate a buffer */ + + if (length > 0) { + + /* Allocate a new buffer for the Buffer */ + + buffer = ACPI_ALLOCATE_ZEROED(length); + if (!buffer) { + status = AE_NO_MEMORY; + goto cleanup; + } + } + break; + + default: /* Should not happen */ + + status = AE_AML_OPERAND_TYPE; + goto cleanup; + } + + if (buffer) { + + /* We have a buffer, 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_ERROR((AE_INFO, "Unknown AML opcode 0x%X", + 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) || walk_state->result_obj) { + acpi_ut_remove_reference(return_desc); + walk_state->result_obj = NULL; + } + + /* Set the return object and exit */ + + else { + walk_state->result_obj = return_desc; + } + return_ACPI_STATUS(status); +} |