/*! * 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;
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;
}
/* * 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 0x%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;
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 0x%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;
u64 index;
acpi_status status = AE_OK;
acpi_size length = 0;
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_CONCATENATE_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.
*/ while ((length < operand[0]->buffer.length) && /* Length of input buffer */
(length < operand[1]->integer.value) && /* Length operand */
(operand[0]->buffer.pointer[length])) { /* Null terminator */
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)
*/
memcpy(return_desc->string.pointer,
operand[0]->buffer.pointer, length); break;
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 ((operand[0])->common.type) { case ACPI_TYPE_STRING:
if (index >= operand[0]->string.length) {
length = operand[0]->string.length;
status = AE_AML_STRING_LIMIT;
}
/* Failure means that the Index was beyond the end of the object */
if (ACPI_FAILURE(status)) {
ACPI_BIOS_EXCEPTION((AE_INFO, status, "Index (0x%X%8.8X) is beyond end of object (length 0x%X)",
ACPI_FORMAT_UINT64(index),
(u32)length)); 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);
ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%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;
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 0x%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_UINT64_MAX;
}
cleanup:
/* Delete return object on error */
if (ACPI_FAILURE(status)) {
acpi_ut_remove_reference(return_desc);
}
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