558 lines
14 KiB
C
558 lines
14 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: exoparg2 - AML execution - opcodes with 2 arguments
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*
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* Copyright (C) 2000 - 2023, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acparser.h"
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#include "acinterp.h"
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#include "acevents.h"
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#include "amlcode.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exoparg2")
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/*!
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* Naming convention for AML interpreter execution routines.
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*
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* The routines that begin execution of AML opcodes are named with a common
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* convention based upon the number of arguments, the number of target operands,
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* and whether or not a value is returned:
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*
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* AcpiExOpcode_xA_yT_zR
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*
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* Where:
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*
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* xA - ARGUMENTS: The number of arguments (input operands) that are
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* required for this opcode type (1 through 6 args).
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* yT - TARGETS: The number of targets (output operands) that are required
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* for this opcode type (0, 1, or 2 targets).
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* zR - RETURN VALUE: Indicates whether this opcode type returns a value
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* as the function return (0 or 1).
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*
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* The AcpiExOpcode* functions are called via the Dispatcher component with
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* fully resolved operands.
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!*/
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_2A_0T_0R
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute opcode with two arguments, no target, and no return
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* value.
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*
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* ALLOCATION: Deletes both operands
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_2A_0T_0R(struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object **operand = &walk_state->operands[0];
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struct acpi_namespace_node *node;
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u32 value;
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_0R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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/* Examine the opcode */
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switch (walk_state->opcode) {
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case AML_NOTIFY_OP: /* Notify (notify_object, notify_value) */
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/* The first operand is a namespace node */
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node = (struct acpi_namespace_node *)operand[0];
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/* Second value is the notify value */
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value = (u32) operand[1]->integer.value;
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/* Are notifies allowed on this object? */
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if (!acpi_ev_is_notify_object(node)) {
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ACPI_ERROR((AE_INFO,
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"Unexpected notify object type [%s]",
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acpi_ut_get_type_name(node->type)));
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status = AE_AML_OPERAND_TYPE;
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break;
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}
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/*
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* Dispatch the notify to the appropriate handler
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* NOTE: the request is queued for execution after this method
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* completes. The notify handlers are NOT invoked synchronously
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* from this thread -- because handlers may in turn run other
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* control methods.
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*/
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status = acpi_ev_queue_notify_request(node, value);
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break;
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default:
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ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
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walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_2A_2T_1R
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a dyadic operator (2 operands) with 2 output targets
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* and one implicit return value.
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_2A_2T_1R(struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object **operand = &walk_state->operands[0];
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union acpi_operand_object *return_desc1 = NULL;
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union acpi_operand_object *return_desc2 = NULL;
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acpi_status status;
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ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_2T_1R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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/* Execute the opcode */
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switch (walk_state->opcode) {
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case AML_DIVIDE_OP:
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/* Divide (Dividend, Divisor, remainder_result quotient_result) */
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return_desc1 =
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acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
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if (!return_desc1) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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return_desc2 =
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acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
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if (!return_desc2) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Quotient to return_desc1, remainder to return_desc2 */
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status = acpi_ut_divide(operand[0]->integer.value,
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operand[1]->integer.value,
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&return_desc1->integer.value,
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&return_desc2->integer.value);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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break;
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default:
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ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
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walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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goto cleanup;
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}
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/* Store the results to the target reference operands */
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status = acpi_ex_store(return_desc2, operand[2], walk_state);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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status = acpi_ex_store(return_desc1, operand[3], walk_state);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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cleanup:
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/*
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* Since the remainder is not returned indirectly, remove a reference to
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* it. Only the quotient is returned indirectly.
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*/
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acpi_ut_remove_reference(return_desc2);
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if (ACPI_FAILURE(status)) {
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/* Delete the return object */
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acpi_ut_remove_reference(return_desc1);
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}
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/* Save return object (the remainder) on success */
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else {
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walk_state->result_obj = return_desc1;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_2A_1T_1R
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute opcode with two arguments, one target, and a return
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* value.
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_2A_1T_1R(struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object **operand = &walk_state->operands[0];
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union acpi_operand_object *return_desc = NULL;
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u64 index;
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acpi_status status = AE_OK;
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acpi_size length = 0;
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ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_1T_1R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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/* Execute the opcode */
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if (walk_state->op_info->flags & AML_MATH) {
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/* All simple math opcodes (add, etc.) */
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return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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return_desc->integer.value =
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acpi_ex_do_math_op(walk_state->opcode,
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operand[0]->integer.value,
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operand[1]->integer.value);
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goto store_result_to_target;
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}
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switch (walk_state->opcode) {
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case AML_MOD_OP: /* Mod (Dividend, Divisor, remainder_result (ACPI 2.0) */
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return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* return_desc will contain the remainder */
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status = acpi_ut_divide(operand[0]->integer.value,
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operand[1]->integer.value,
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NULL, &return_desc->integer.value);
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break;
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case AML_CONCATENATE_OP: /* Concatenate (Data1, Data2, Result) */
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status =
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acpi_ex_do_concatenate(operand[0], operand[1], &return_desc,
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walk_state);
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break;
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case AML_TO_STRING_OP: /* to_string (Buffer, Length, Result) (ACPI 2.0) */
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/*
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* Input object is guaranteed to be a buffer at this point (it may have
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* been converted.) Copy the raw buffer data to a new object of
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* type String.
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*/
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/*
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* Get the length of the new string. It is the smallest of:
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* 1) Length of the input buffer
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* 2) Max length as specified in the to_string operator
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* 3) Length of input buffer up to a zero byte (null terminator)
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*
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* NOTE: A length of zero is ok, and will create a zero-length, null
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* terminated string.
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*/
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while ((length < operand[0]->buffer.length) && /* Length of input buffer */
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(length < operand[1]->integer.value) && /* Length operand */
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(operand[0]->buffer.pointer[length])) { /* Null terminator */
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length++;
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}
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/* Allocate a new string object */
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return_desc = acpi_ut_create_string_object(length);
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/*
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* Copy the raw buffer data with no transform.
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* (NULL terminated already)
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*/
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memcpy(return_desc->string.pointer,
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operand[0]->buffer.pointer, length);
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break;
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case AML_CONCATENATE_TEMPLATE_OP:
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/* concatenate_res_template (Buffer, Buffer, Result) (ACPI 2.0) */
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status =
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acpi_ex_concat_template(operand[0], operand[1],
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&return_desc, walk_state);
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break;
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case AML_INDEX_OP: /* Index (Source Index Result) */
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/* Create the internal return object */
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return_desc =
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acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Initialize the Index reference object */
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index = operand[1]->integer.value;
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return_desc->reference.value = (u32) index;
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return_desc->reference.class = ACPI_REFCLASS_INDEX;
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/*
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* At this point, the Source operand is a String, Buffer, or Package.
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* Verify that the index is within range.
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*/
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switch ((operand[0])->common.type) {
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case ACPI_TYPE_STRING:
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if (index >= operand[0]->string.length) {
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length = operand[0]->string.length;
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status = AE_AML_STRING_LIMIT;
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}
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return_desc->reference.target_type =
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ACPI_TYPE_BUFFER_FIELD;
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return_desc->reference.index_pointer =
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&(operand[0]->buffer.pointer[index]);
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break;
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case ACPI_TYPE_BUFFER:
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if (index >= operand[0]->buffer.length) {
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length = operand[0]->buffer.length;
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status = AE_AML_BUFFER_LIMIT;
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}
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return_desc->reference.target_type =
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ACPI_TYPE_BUFFER_FIELD;
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return_desc->reference.index_pointer =
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&(operand[0]->buffer.pointer[index]);
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break;
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case ACPI_TYPE_PACKAGE:
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if (index >= operand[0]->package.count) {
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length = operand[0]->package.count;
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status = AE_AML_PACKAGE_LIMIT;
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}
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return_desc->reference.target_type = ACPI_TYPE_PACKAGE;
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return_desc->reference.where =
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&operand[0]->package.elements[index];
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break;
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default:
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ACPI_ERROR((AE_INFO,
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"Invalid object type: %X",
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(operand[0])->common.type));
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status = AE_AML_INTERNAL;
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goto cleanup;
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}
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/* Failure means that the Index was beyond the end of the object */
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if (ACPI_FAILURE(status)) {
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ACPI_BIOS_EXCEPTION((AE_INFO, status,
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"Index (0x%X%8.8X) is beyond end of object (length 0x%X)",
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ACPI_FORMAT_UINT64(index),
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(u32)length));
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goto cleanup;
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}
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/*
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* Save the target object and add a reference to it for the life
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* of the index
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*/
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return_desc->reference.object = operand[0];
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acpi_ut_add_reference(operand[0]);
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/* Store the reference to the Target */
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status = acpi_ex_store(return_desc, operand[2], walk_state);
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/* Return the reference */
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walk_state->result_obj = return_desc;
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goto cleanup;
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default:
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ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
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walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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break;
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}
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store_result_to_target:
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if (ACPI_SUCCESS(status)) {
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/*
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* Store the result of the operation (which is now in return_desc) into
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* the Target descriptor.
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*/
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status = acpi_ex_store(return_desc, operand[2], walk_state);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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if (!walk_state->result_obj) {
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walk_state->result_obj = return_desc;
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}
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}
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cleanup:
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/* Delete return object on error */
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if (ACPI_FAILURE(status)) {
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acpi_ut_remove_reference(return_desc);
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walk_state->result_obj = NULL;
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_opcode_2A_0T_1R
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*
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* PARAMETERS: walk_state - Current walk state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute opcode with 2 arguments, no target, and a return value
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*
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******************************************************************************/
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acpi_status acpi_ex_opcode_2A_0T_1R(struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object **operand = &walk_state->operands[0];
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union acpi_operand_object *return_desc = NULL;
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acpi_status status = AE_OK;
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u8 logical_result = FALSE;
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ACPI_FUNCTION_TRACE_STR(ex_opcode_2A_0T_1R,
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acpi_ps_get_opcode_name(walk_state->opcode));
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/* Create the internal return object */
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return_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
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if (!return_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/* Execute the Opcode */
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if (walk_state->op_info->flags & AML_LOGICAL_NUMERIC) {
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/* logical_op (Operand0, Operand1) */
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status = acpi_ex_do_logical_numeric_op(walk_state->opcode,
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operand[0]->integer.
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value,
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operand[1]->integer.
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value, &logical_result);
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goto store_logical_result;
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} else if (walk_state->op_info->flags & AML_LOGICAL) {
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/* logical_op (Operand0, Operand1) */
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status = acpi_ex_do_logical_op(walk_state->opcode, operand[0],
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operand[1], &logical_result);
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goto store_logical_result;
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}
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switch (walk_state->opcode) {
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case AML_ACQUIRE_OP: /* Acquire (mutex_object, Timeout) */
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status =
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acpi_ex_acquire_mutex(operand[1], operand[0], walk_state);
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if (status == AE_TIME) {
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logical_result = TRUE; /* TRUE = Acquire timed out */
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status = AE_OK;
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}
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break;
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case AML_WAIT_OP: /* Wait (event_object, Timeout) */
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status = acpi_ex_system_wait_event(operand[1], operand[0]);
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if (status == AE_TIME) {
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logical_result = TRUE; /* TRUE, Wait timed out */
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status = AE_OK;
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}
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break;
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default:
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ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X",
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walk_state->opcode));
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status = AE_AML_BAD_OPCODE;
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goto cleanup;
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}
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store_logical_result:
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/*
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* Set return value to according to logical_result. logical TRUE (all ones)
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* Default is FALSE (zero)
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*/
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if (logical_result) {
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return_desc->integer.value = ACPI_UINT64_MAX;
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}
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cleanup:
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/* Delete return object on error */
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if (ACPI_FAILURE(status)) {
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acpi_ut_remove_reference(return_desc);
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}
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/* Save return object on success */
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else {
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walk_state->result_obj = return_desc;
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}
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return_ACPI_STATUS(status);
|
|
}
|