exoparg2.c
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:15k
- /******************************************************************************
- *
- * Module Name: exoparg2 - AML execution - opcodes with 2 arguments
- * $Revision: 97 $
- *
- *****************************************************************************/
- /*
- * Copyright (C) 2000, 2001 R. Byron Moore
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include "acpi.h"
- #include "acparser.h"
- #include "acnamesp.h"
- #include "acinterp.h"
- #include "acevents.h"
- #include "amlcode.h"
- #include "acdispat.h"
- #define _COMPONENT ACPI_EXECUTER
- 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 (
- acpi_walk_state *walk_state)
- {
- acpi_operand_object **operand = &walk_state->operands[0];
- acpi_namespace_node *node;
- acpi_status status = AE_OK;
- 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 = (acpi_namespace_node *) operand[0];
- /* The node must refer to a device or thermal zone */
- if (node && operand[1]) /* TBD: is this check necessary? */ {
- switch (node->type) {
- case ACPI_TYPE_DEVICE:
- case ACPI_TYPE_THERMAL:
- /*
- * 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,
- (u32) operand[1]->integer.value);
- break;
- default:
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unexpected notify object type %Xn",
- node->type));
- status = AE_AML_OPERAND_TYPE;
- break;
- }
- }
- break;
- default:
- REPORT_ERROR (("Acpi_ex_opcode_2A_0T_0R: Unknown opcode %Xn", 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 (
- acpi_walk_state *walk_state)
- {
- acpi_operand_object **operand = &walk_state->operands[0];
- acpi_operand_object *return_desc1 = NULL;
- acpi_operand_object *return_desc2 = NULL;
- acpi_status status;
- 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:
- REPORT_ERROR (("Acpi_ex_opcode_2A_2T_1R: Unknown opcode %Xn",
- walk_state->opcode));
- status = AE_AML_BAD_OPCODE;
- goto cleanup;
- break;
- }
- /* 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;
- }
- /* Return the remainder */
- walk_state->result_obj = return_desc1;
- 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);
- }
- 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 (
- acpi_walk_state *walk_state)
- {
- acpi_operand_object **operand = &walk_state->operands[0];
- acpi_operand_object *return_desc = NULL;
- acpi_operand_object *temp_desc;
- u32 index;
- acpi_status status = AE_OK;
- 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) */
- /*
- * Convert the second operand if necessary. The first operand
- * determines the type of the second operand, (See the Data Types
- * section of the ACPI specification.) Both object types are
- * guaranteed to be either Integer/String/Buffer by the operand
- * resolution mechanism above.
- */
- switch (operand[0]->common.type) {
- case ACPI_TYPE_INTEGER:
- status = acpi_ex_convert_to_integer (operand[1], &operand[1], walk_state);
- break;
- case ACPI_TYPE_STRING:
- status = acpi_ex_convert_to_string (operand[1], &operand[1], 16, ACPI_UINT32_MAX, walk_state);
- break;
- case ACPI_TYPE_BUFFER:
- status = acpi_ex_convert_to_buffer (operand[1], &operand[1], walk_state);
- break;
- default:
- status = AE_AML_INTERNAL;
- }
- if (ACPI_FAILURE (status)) {
- goto cleanup;
- }
- /*
- * Both operands are now known to be the same object type
- * (Both are Integer, String, or Buffer), and we can now perform the
- * concatenation.
- */
- 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) */
- status = acpi_ex_convert_to_string (operand[0], &return_desc, 16,
- (u32) operand[1]->integer.value, walk_state);
- break;
- case AML_CONCAT_RES_OP: /* Concatenate_res_template (Buffer, Buffer, Result) (ACPI 2.0) */
- status = AE_NOT_IMPLEMENTED;
- break;
- case AML_INDEX_OP: /* Index (Source Index Result) */
- /* Create the internal return object */
- return_desc = acpi_ut_create_internal_object (INTERNAL_TYPE_REFERENCE);
- if (!return_desc) {
- status = AE_NO_MEMORY;
- goto cleanup;
- }
- index = (u32) operand[1]->integer.value;
- /*
- * At this point, the Source operand is either a Package or a Buffer
- */
- if (operand[0]->common.type == ACPI_TYPE_PACKAGE) {
- /* Object to be indexed is a Package */
- if (index >= operand[0]->package.count) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Index value beyond package endn"));
- status = AE_AML_PACKAGE_LIMIT;
- goto cleanup;
- }
- if ((operand[2]->common.type == INTERNAL_TYPE_REFERENCE) &&
- (operand[2]->reference.opcode == AML_ZERO_OP)) {
- /*
- * There is no actual result descriptor (the Zero_op Result
- * descriptor is a placeholder), so just delete the placeholder and
- * return a reference to the package element
- */
- acpi_ut_remove_reference (operand[2]);
- }
- else {
- /*
- * Each element of the package is an internal object. Get the one
- * we are after.
- */
- temp_desc = operand[0]->package.elements [index];
- return_desc->reference.opcode = AML_INDEX_OP;
- return_desc->reference.target_type = temp_desc->common.type;
- return_desc->reference.object = temp_desc;
- status = acpi_ex_store (return_desc, operand[2], walk_state);
- return_desc->reference.object = NULL;
- }
- /*
- * The local return object must always be a reference to the package element,
- * not the element itself.
- */
- return_desc->reference.opcode = AML_INDEX_OP;
- return_desc->reference.target_type = ACPI_TYPE_PACKAGE;
- return_desc->reference.where = &operand[0]->package.elements [index];
- }
- else {
- /* Object to be indexed is a Buffer */
- if (index >= operand[0]->buffer.length) {
- ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Index value beyond end of buffern"));
- status = AE_AML_BUFFER_LIMIT;
- goto cleanup;
- }
- return_desc->reference.opcode = AML_INDEX_OP;
- return_desc->reference.target_type = ACPI_TYPE_BUFFER_FIELD;
- return_desc->reference.object = operand[0];
- return_desc->reference.offset = index;
- status = acpi_ex_store (return_desc, operand[2], walk_state);
- }
- walk_state->result_obj = return_desc;
- goto cleanup;
- break;
- default:
- REPORT_ERROR (("Acpi_ex_opcode_2A_1T_1R: Unknown opcode %Xn",
- 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;
- }
- walk_state->result_obj = return_desc;
- }
- cleanup:
- /* Delete return object on error */
- if (ACPI_FAILURE (status)) {
- acpi_ut_remove_reference (return_desc);
- }
- 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 (
- acpi_walk_state *walk_state)
- {
- acpi_operand_object **operand = &walk_state->operands[0];
- acpi_operand_object *return_desc = NULL;
- acpi_status status = AE_OK;
- u8 logical_result = FALSE;
- 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) /* Logical_op (Operand0, Operand1) */ {
- logical_result = acpi_ex_do_logical_op (walk_state->opcode,
- operand[0]->integer.value,
- operand[1]->integer.value);
- 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:
- REPORT_ERROR (("Acpi_ex_opcode_2A_0T_1R: Unknown opcode %Xn", walk_state->opcode));
- status = AE_AML_BAD_OPCODE;
- goto cleanup;
- break;
- }
- 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;
- }
- walk_state->result_obj = return_desc;
- cleanup:
- /* Delete return object on error */
- if (ACPI_FAILURE (status)) {
- acpi_ut_remove_reference (return_desc);
- }
- return_ACPI_STATUS (status);
- }