// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name : exoparg2 - AML execution - opcodes with 2 arguments
*
* Copyright ( C ) 2000 - 2025 , Intel Corp .
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acparser.h"
#include "acinterp.h"
#include "acevents.h"
#include "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 ;
}
/*
* 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;
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 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 ;
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_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 ;
case AML_CONCATENATE_TEMPLATE_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 ((operand[0 ])->common.type) {
case ACPI_TYPE_STRING:
if (index >= operand[0 ]->string.length) {
length = operand[0 ]->string.length;
status = AE_AML_STRING_LIMIT;
}
return_desc->reference.target_type =
ACPI_TYPE_BUFFER_FIELD;
return_desc->reference.index_pointer =
&(operand[0 ]->buffer.pointer[index]);
break ;
case ACPI_TYPE_BUFFER:
if (index >= operand[0 ]->buffer.length) {
length = operand[0 ]->buffer.length;
status = AE_AML_BUFFER_LIMIT;
}
return_desc->reference.target_type =
ACPI_TYPE_BUFFER_FIELD;
return_desc->reference.index_pointer =
&(operand[0 ]->buffer.pointer[index]);
break ;
case ACPI_TYPE_PACKAGE:
if (index >= operand[0 ]->package.count) {
length = 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 :
ACPI_ERROR((AE_INFO,
"Invalid object type: %X" ,
(operand[0 ])->common.type));
status = AE_AML_INTERNAL;
goto cleanup;
}
/* 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);
/* Return the reference */
walk_state->result_obj = return_desc;
goto cleanup;
default :
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 ;
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 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);
}
/* Save return object on success */
else {
walk_state->result_obj = return_desc;
}
return_ACPI_STATUS(status);
}
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