diff options
Diffstat (limited to 'drivers/acpi/acpica/exoparg2.c')
| -rw-r--r-- | drivers/acpi/acpica/exoparg2.c | 605 |
1 files changed, 605 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/exoparg2.c b/drivers/acpi/acpica/exoparg2.c new file mode 100644 index 000000000000..b01980df1365 --- /dev/null +++ b/drivers/acpi/acpica/exoparg2.c @@ -0,0 +1,605 @@ +/****************************************************************************** + * + * Module Name: exoparg2 - AML execution - opcodes with 2 arguments + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, 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 <acpi/accommon.h> +#include <acpi/acparser.h> +#include <acpi/acinterp.h> +#include <acpi/acevents.h> +#include <acpi/amlcode.h> + +#define _COMPONENT ACPI_EXECUTER +ACPI_MODULE_NAME("exoparg2") + +/*! + * 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_2A_0T_0R + * + * PARAMETERS: walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Execute opcode with two arguments, no target, and no return + * value. + * + * ALLOCATION: Deletes both operands + * + ******************************************************************************/ +acpi_status acpi_ex_opcode_2A_0T_0R(struct acpi_walk_state *walk_state) +{ + union acpi_operand_object **operand = &walk_state->operands[0]; + struct acpi_namespace_node *node; + u32 value; + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_0R, + acpi_ps_get_opcode_name(walk_state->opcode)); + + /* Examine the opcode */ + + switch (walk_state->opcode) { + case AML_NOTIFY_OP: /* Notify (notify_object, notify_value) */ + + /* The first operand is a namespace node */ + + node = (struct acpi_namespace_node *)operand[0]; + + /* Second value is the notify value */ + + value = (u32) operand[1]->integer.value; + + /* Are notifies allowed on this object? */ + + if (!acpi_ev_is_notify_object(node)) { + ACPI_ERROR((AE_INFO, + "Unexpected notify object type [%s]", + acpi_ut_get_type_name(node->type))); + + status = AE_AML_OPERAND_TYPE; + break; + } +#ifdef ACPI_GPE_NOTIFY_CHECK + /* + * GPE method wake/notify check. Here, we want to ensure that we + * don't receive any "DeviceWake" Notifies from a GPE _Lxx or _Exx + * GPE method during system runtime. If we do, the GPE is marked + * as "wake-only" and disabled. + * + * 1) Is the Notify() value == device_wake? + * 2) Is this a GPE deferred method? (An _Lxx or _Exx method) + * 3) Did the original GPE happen at system runtime? + * (versus during wake) + * + * If all three cases are true, this is a wake-only GPE that should + * be disabled at runtime. + */ + if (value == 2) { /* device_wake */ + status = + acpi_ev_check_for_wake_only_gpe(walk_state-> + gpe_event_info); + if (ACPI_FAILURE(status)) { + + /* AE_WAKE_ONLY_GPE only error, means ignore this notify */ + + return_ACPI_STATUS(AE_OK) + } + } +#endif + + /* + * Dispatch the notify to the appropriate handler + * NOTE: the request is queued for execution after this method + * completes. The notify handlers are NOT invoked synchronously + * from this thread -- because handlers may in turn run other + * control methods. + */ + status = acpi_ev_queue_notify_request(node, value); + break; + + default: + + ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", + walk_state->opcode)); + status = AE_AML_BAD_OPCODE; + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_opcode_2A_2T_1R + * + * PARAMETERS: walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets + * and one implicit return value. + * + ******************************************************************************/ + +acpi_status acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state *walk_state) +{ + union acpi_operand_object **operand = &walk_state->operands[0]; + union acpi_operand_object *return_desc1 = NULL; + union acpi_operand_object *return_desc2 = NULL; + acpi_status status; + + ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_2T_1R, + acpi_ps_get_opcode_name(walk_state->opcode)); + + /* Execute the opcode */ + + switch (walk_state->opcode) { + case AML_DIVIDE_OP: + + /* Divide (Dividend, Divisor, remainder_result quotient_result) */ + + return_desc1 = + acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); + if (!return_desc1) { + status = AE_NO_MEMORY; + goto cleanup; + } + + return_desc2 = + acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); + if (!return_desc2) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Quotient to return_desc1, remainder to return_desc2 */ + + status = acpi_ut_divide(operand[0]->integer.value, + operand[1]->integer.value, + &return_desc1->integer.value, + &return_desc2->integer.value); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + break; + + default: + + ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", + walk_state->opcode)); + status = AE_AML_BAD_OPCODE; + goto cleanup; + } + + /* Store the results to the target reference operands */ + + status = acpi_ex_store(return_desc2, operand[2], walk_state); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + status = acpi_ex_store(return_desc1, operand[3], walk_state); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + cleanup: + /* + * Since the remainder is not returned indirectly, remove a reference to + * it. Only the quotient is returned indirectly. + */ + acpi_ut_remove_reference(return_desc2); + + if (ACPI_FAILURE(status)) { + + /* Delete the return object */ + + acpi_ut_remove_reference(return_desc1); + } + + /* Save return object (the remainder) on success */ + + else { + walk_state->result_obj = return_desc1; + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_opcode_2A_1T_1R + * + * PARAMETERS: walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Execute opcode with two arguments, one target, and a return + * value. + * + ******************************************************************************/ + +acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state) +{ + union acpi_operand_object **operand = &walk_state->operands[0]; + union acpi_operand_object *return_desc = NULL; + acpi_integer index; + acpi_status status = AE_OK; + acpi_size length; + + ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_1T_1R, + acpi_ps_get_opcode_name(walk_state->opcode)); + + /* Execute the opcode */ + + if (walk_state->op_info->flags & AML_MATH) { + + /* All simple math opcodes (add, etc.) */ + + return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); + if (!return_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + return_desc->integer.value = + acpi_ex_do_math_op(walk_state->opcode, + operand[0]->integer.value, + operand[1]->integer.value); + goto store_result_to_target; + } + + switch (walk_state->opcode) { + case AML_MOD_OP: /* Mod (Dividend, Divisor, remainder_result (ACPI 2.0) */ + + return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); + if (!return_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* return_desc will contain the remainder */ + + status = acpi_ut_divide(operand[0]->integer.value, + operand[1]->integer.value, + NULL, &return_desc->integer.value); + break; + + case AML_CONCAT_OP: /* Concatenate (Data1, Data2, Result) */ + + status = acpi_ex_do_concatenate(operand[0], operand[1], + &return_desc, walk_state); + break; + + case AML_TO_STRING_OP: /* to_string (Buffer, Length, Result) (ACPI 2.0) */ + + /* + * Input object is guaranteed to be a buffer at this point (it may have + * been converted.) Copy the raw buffer data to a new object of + * type String. + */ + + /* + * Get the length of the new string. It is the smallest of: + * 1) Length of the input buffer + * 2) Max length as specified in the to_string operator + * 3) Length of input buffer up to a zero byte (null terminator) + * + * NOTE: A length of zero is ok, and will create a zero-length, null + * terminated string. + */ + length = 0; + while ((length < operand[0]->buffer.length) && + (length < operand[1]->integer.value) && + (operand[0]->buffer.pointer[length])) { + length++; + } + + /* Allocate a new string object */ + + return_desc = acpi_ut_create_string_object(length); + if (!return_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* + * Copy the raw buffer data with no transform. + * (NULL terminated already) + */ + ACPI_MEMCPY(return_desc->string.pointer, + operand[0]->buffer.pointer, length); + break; + + case AML_CONCAT_RES_OP: + + /* concatenate_res_template (Buffer, Buffer, Result) (ACPI 2.0) */ + + status = acpi_ex_concat_template(operand[0], operand[1], + &return_desc, walk_state); + break; + + case AML_INDEX_OP: /* Index (Source Index Result) */ + + /* Create the internal return object */ + + return_desc = + acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE); + if (!return_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Initialize the Index reference object */ + + index = operand[1]->integer.value; + return_desc->reference.value = (u32) index; + return_desc->reference.class = ACPI_REFCLASS_INDEX; + + /* + * At this point, the Source operand is a String, Buffer, or Package. + * Verify that the index is within range. + */ + switch (ACPI_GET_OBJECT_TYPE(operand[0])) { + case ACPI_TYPE_STRING: + + if (index >= operand[0]->string.length) { + status = AE_AML_STRING_LIMIT; + } + + return_desc->reference.target_type = + ACPI_TYPE_BUFFER_FIELD; + break; + + case ACPI_TYPE_BUFFER: + + if (index >= operand[0]->buffer.length) { + status = AE_AML_BUFFER_LIMIT; + } + + return_desc->reference.target_type = + ACPI_TYPE_BUFFER_FIELD; + break; + + case ACPI_TYPE_PACKAGE: + + if (index >= operand[0]->package.count) { + status = AE_AML_PACKAGE_LIMIT; + } + + return_desc->reference.target_type = ACPI_TYPE_PACKAGE; + return_desc->reference.where = + &operand[0]->package.elements[index]; + break; + + default: + + status = AE_AML_INTERNAL; + goto cleanup; + } + + /* Failure means that the Index was beyond the end of the object */ + + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "Index (%X%8.8X) is beyond end of object", + ACPI_FORMAT_UINT64(index))); + goto cleanup; + } + + /* + * Save the target object and add a reference to it for the life + * of the index + */ + return_desc->reference.object = operand[0]; + acpi_ut_add_reference(operand[0]); + + /* Store the reference to the Target */ + + status = acpi_ex_store(return_desc, operand[2], walk_state); + + /* Return the reference */ + + walk_state->result_obj = return_desc; + goto cleanup; + + default: + + ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", + walk_state->opcode)); + status = AE_AML_BAD_OPCODE; + break; + } + + store_result_to_target: + + if (ACPI_SUCCESS(status)) { + /* + * Store the result of the operation (which is now in return_desc) into + * the Target descriptor. + */ + status = acpi_ex_store(return_desc, operand[2], walk_state); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + if (!walk_state->result_obj) { + walk_state->result_obj = return_desc; + } + } + + cleanup: + + /* Delete return object on error */ + + if (ACPI_FAILURE(status)) { + acpi_ut_remove_reference(return_desc); + walk_state->result_obj = NULL; + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ex_opcode_2A_0T_1R + * + * PARAMETERS: walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value + * + ******************************************************************************/ + +acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state) +{ + union acpi_operand_object **operand = &walk_state->operands[0]; + union acpi_operand_object *return_desc = NULL; + acpi_status status = AE_OK; + u8 logical_result = FALSE; + + ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_1R, + acpi_ps_get_opcode_name(walk_state->opcode)); + + /* Create the internal return object */ + + return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); + if (!return_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Execute the Opcode */ + + if (walk_state->op_info->flags & AML_LOGICAL_NUMERIC) { + + /* logical_op (Operand0, Operand1) */ + + status = acpi_ex_do_logical_numeric_op(walk_state->opcode, + operand[0]->integer. + value, + operand[1]->integer. + value, &logical_result); + goto store_logical_result; + } else if (walk_state->op_info->flags & AML_LOGICAL) { + + /* logical_op (Operand0, Operand1) */ + + status = acpi_ex_do_logical_op(walk_state->opcode, operand[0], + operand[1], &logical_result); + goto store_logical_result; + } + + switch (walk_state->opcode) { + case AML_ACQUIRE_OP: /* Acquire (mutex_object, Timeout) */ + + status = + acpi_ex_acquire_mutex(operand[1], operand[0], walk_state); + if (status == AE_TIME) { + logical_result = TRUE; /* TRUE = Acquire timed out */ + status = AE_OK; + } + break; + + case AML_WAIT_OP: /* Wait (event_object, Timeout) */ + + status = acpi_ex_system_wait_event(operand[1], operand[0]); + if (status == AE_TIME) { + logical_result = TRUE; /* TRUE, Wait timed out */ + status = AE_OK; + } + break; + + default: + + ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", + walk_state->opcode)); + status = AE_AML_BAD_OPCODE; + goto cleanup; + } + + store_logical_result: + /* + * Set return value to according to logical_result. logical TRUE (all ones) + * Default is FALSE (zero) + */ + if (logical_result) { + return_desc->integer.value = ACPI_INTEGER_MAX; + } + + cleanup: + + /* Delete return object on error */ + + if (ACPI_FAILURE(status)) { + acpi_ut_remove_reference(return_desc); + } + + /* Save return object on success */ + + else { + walk_state->result_obj = return_desc; + } + + return_ACPI_STATUS(status); +} |
