Orange Pi5 kernel

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: extrace - Support for interpreter execution tracing
 *
 * Copyright (C) 2000 - 2020, Intel Corp.
 *
 *****************************************************************************/
 
#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "acinterp.h"
 
#define _COMPONENT          ACPI_EXECUTER
ACPI_MODULE_NAME("extrace")
 
static union acpi_operand_object *acpi_gbl_trace_method_object = NULL;
 
/* Local prototypes */
 
#ifdef ACPI_DEBUG_OUTPUT
static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type);
#endif
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_interpreter_trace_enabled
 *
 * PARAMETERS:  name                - Whether method name should be matched,
 *                                    this should be checked before starting
 *                                    the tracer
 *
 * RETURN:      TRUE if interpreter trace is enabled.
 *
 * DESCRIPTION: Check whether interpreter trace is enabled
 *
 ******************************************************************************/
 
static u8 acpi_ex_interpreter_trace_enabled(char *name)
{
 
<------>/* Check if tracing is enabled */
 
<------>if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) {
<------><------>return (FALSE);
<------>}
 
<------>/*
<------> * Check if tracing is filtered:
<------> *
<------> * 1. If the tracer is started, acpi_gbl_trace_method_object should have
<------> *    been filled by the trace starter
<------> * 2. If the tracer is not started, acpi_gbl_trace_method_name should be
<------> *    matched if it is specified
<------> * 3. If the tracer is oneshot style, acpi_gbl_trace_method_name should
<------> *    not be cleared by the trace stopper during the first match
<------> */
<------>if (acpi_gbl_trace_method_object) {
<------><------>return (TRUE);
<------>}
 
<------>if (name &&
<------>    (acpi_gbl_trace_method_name &&
<------>     strcmp(acpi_gbl_trace_method_name, name))) {
<------><------>return (FALSE);
<------>}
 
<------>if ((acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) &&
<------>    !acpi_gbl_trace_method_name) {
<------><------>return (FALSE);
<------>}
 
<------>return (TRUE);
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_get_trace_event_name
 *
 * PARAMETERS:  type            - Trace event type
 *
 * RETURN:      Trace event name.
 *
 * DESCRIPTION: Used to obtain the full trace event name.
 *
 ******************************************************************************/
 
#ifdef ACPI_DEBUG_OUTPUT
 
static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type)
{
 
<------>switch (type) {
<------>case ACPI_TRACE_AML_METHOD:
 
<------><------>return "Method";
 
<------>case ACPI_TRACE_AML_OPCODE:
 
<------><------>return "Opcode";
 
<------>case ACPI_TRACE_AML_REGION:
 
<------><------>return "Region";
 
<------>default:
 
<------><------>return "";
<------>}
}
 
#endif
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_trace_point
 *
 * PARAMETERS:  type                - Trace event type
 *              begin               - TRUE if before execution
 *              aml                 - Executed AML address
 *              pathname            - Object path
 *
 * RETURN:      None
 *
 * DESCRIPTION: Internal interpreter execution trace.
 *
 ******************************************************************************/
 
void
acpi_ex_trace_point(acpi_trace_event_type type,
<------><------>    u8 begin, u8 *aml, char *pathname)
{
 
<------>ACPI_FUNCTION_NAME(ex_trace_point);
 
<------>if (pathname) {
<------><------>ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
<------><------><------><------>  "%s %s [0x%p:%s] execution.\n",
<------><------><------><------>  acpi_ex_get_trace_event_name(type),
<------><------><------><------>  begin ? "Begin" : "End", aml, pathname));
<------>} else {
<------><------>ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
<------><------><------><------>  "%s %s [0x%p] execution.\n",
<------><------><------><------>  acpi_ex_get_trace_event_name(type),
<------><------><------><------>  begin ? "Begin" : "End", aml));
<------>}
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_start_trace_method
 *
 * PARAMETERS:  method_node         - Node of the method
 *              obj_desc            - The method object
 *              walk_state          - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Start control method execution trace
 *
 ******************************************************************************/
 
void
acpi_ex_start_trace_method(struct acpi_namespace_node *method_node,
<------><------><------>   union acpi_operand_object *obj_desc,
<------><------><------>   struct acpi_walk_state *walk_state)
{
<------>char *pathname = NULL;
<------>u8 enabled = FALSE;
 
<------>ACPI_FUNCTION_NAME(ex_start_trace_method);
 
<------>if (method_node) {
<------><------>pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
<------>}
 
<------>enabled = acpi_ex_interpreter_trace_enabled(pathname);
<------>if (enabled && !acpi_gbl_trace_method_object) {
<------><------>acpi_gbl_trace_method_object = obj_desc;
<------><------>acpi_gbl_original_dbg_level = acpi_dbg_level;
<------><------>acpi_gbl_original_dbg_layer = acpi_dbg_layer;
<------><------>acpi_dbg_level = ACPI_TRACE_LEVEL_ALL;
<------><------>acpi_dbg_layer = ACPI_TRACE_LAYER_ALL;
 
<------><------>if (acpi_gbl_trace_dbg_level) {
<------><------><------>acpi_dbg_level = acpi_gbl_trace_dbg_level;
<------><------>}
 
<------><------>if (acpi_gbl_trace_dbg_layer) {
<------><------><------>acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
<------><------>}
<------>}
 
<------>if (enabled) {
<------><------>ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, TRUE,
<------><------><------><------> obj_desc ? obj_desc->method.aml_start : NULL,
<------><------><------><------> pathname);
<------>}
 
<------>if (pathname) {
<------><------>ACPI_FREE(pathname);
<------>}
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_stop_trace_method
 *
 * PARAMETERS:  method_node         - Node of the method
 *              obj_desc            - The method object
 *              walk_state          - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Stop control method execution trace
 *
 ******************************************************************************/
 
void
acpi_ex_stop_trace_method(struct acpi_namespace_node *method_node,
<------><------><------>  union acpi_operand_object *obj_desc,
<------><------><------>  struct acpi_walk_state *walk_state)
{
<------>char *pathname = NULL;
<------>u8 enabled;
 
<------>ACPI_FUNCTION_NAME(ex_stop_trace_method);
 
<------>if (method_node) {
<------><------>pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
<------>}
 
<------>enabled = acpi_ex_interpreter_trace_enabled(NULL);
 
<------>if (enabled) {
<------><------>ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, FALSE,
<------><------><------><------> obj_desc ? obj_desc->method.aml_start : NULL,
<------><------><------><------> pathname);
<------>}
 
<------>/* Check whether the tracer should be stopped */
 
<------>if (acpi_gbl_trace_method_object == obj_desc) {
 
<------><------>/* Disable further tracing if type is one-shot */
 
<------><------>if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) {
<------><------><------>acpi_gbl_trace_method_name = NULL;
<------><------>}
 
<------><------>acpi_dbg_level = acpi_gbl_original_dbg_level;
<------><------>acpi_dbg_layer = acpi_gbl_original_dbg_layer;
<------><------>acpi_gbl_trace_method_object = NULL;
<------>}
 
<------>if (pathname) {
<------><------>ACPI_FREE(pathname);
<------>}
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_start_trace_opcode
 *
 * PARAMETERS:  op                  - The parser opcode object
 *              walk_state          - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Start opcode execution trace
 *
 ******************************************************************************/
 
void
acpi_ex_start_trace_opcode(union acpi_parse_object *op,
<------><------><------>   struct acpi_walk_state *walk_state)
{
 
<------>ACPI_FUNCTION_NAME(ex_start_trace_opcode);
 
<------>if (acpi_ex_interpreter_trace_enabled(NULL) &&
<------>    (acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
<------><------>ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, TRUE,
<------><------><------><------> op->common.aml, op->common.aml_op_name);
<------>}
}
 
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_stop_trace_opcode
 *
 * PARAMETERS:  op                  - The parser opcode object
 *              walk_state          - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Stop opcode execution trace
 *
 ******************************************************************************/
 
void
acpi_ex_stop_trace_opcode(union acpi_parse_object *op,
<------><------><------>  struct acpi_walk_state *walk_state)
{
 
<------>ACPI_FUNCTION_NAME(ex_stop_trace_opcode);
 
<------>if (acpi_ex_interpreter_trace_enabled(NULL) &&
<------>    (acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
<------><------>ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, FALSE,
<------><------><------><------> op->common.aml, op->common.aml_op_name);
<------>}
}