exoparg2.c

linux-2.6.15.6

		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++;
			if (length > ACPI_MAX_STRING_CONVERSION) {
				status = AE_AML_STRING_LIMIT;
				goto cleanup;
			}
		}

		/* 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;
		}

		index = operand[1]->integer.value;

		/* At this point, the Source operand is a Package, Buffer, or String */

		if (ACPI_GET_OBJECT_TYPE(operand[0]) == ACPI_TYPE_PACKAGE) {
			/* Object to be indexed is a Package */

			if (index >= operand[0]->package.count) {
				ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
						  "Index value (%X%8.8X) beyond package end (%X)\n",
						  ACPI_FORMAT_UINT64(index),
						  operand[0]->package.count));
				status = AE_AML_PACKAGE_LIMIT;
				goto cleanup;
			}

			return_desc->reference.target_type = ACPI_TYPE_PACKAGE;
			return_desc->reference.object = operand[0];
			return_desc->reference.where =
			    &operand[0]->package.elements[index];
		} else {
			/* Object to be indexed is a Buffer/String */

			if (index >= operand[0]->buffer.length) {
				ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
						  "Index value (%X%8.8X) beyond end of buffer (%X)\n",
						  ACPI_FORMAT_UINT64(index),
						  operand[0]->buffer.length));
				status = AE_AML_BUFFER_LIMIT;
				goto cleanup;
			}

			return_desc->reference.target_type =
			    ACPI_TYPE_BUFFER_FIELD;
			return_desc->reference.object = operand[0];
		}

		/*
		 * Add a reference to the target package/buffer/string for the life
		 * of the index.
		 */
		acpi_ut_add_reference(operand[0]);

		/* Complete the Index reference object */

		return_desc->reference.opcode = AML_INDEX_OP;
		return_desc->reference.offset = (u32) index;

		/* 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_REPORT_ERROR(("acpi_ex_opcode_2A_1T_1R: Unknown opcode %X\n", 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);
	}

	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_REPORT_ERROR(("acpi_ex_opcode_2A_0T_1R: Unknown opcode %X\n", 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;
	}

	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);
}