/* ----------------------------------------------------------------------------
 * Copyright (c) Huawei Technologies Co., Ltd. 2018-2019. All rights reserved.
 * Description: Percpu Private HeadFile
 * Author: Huawei LiteOS Team
 * Create: 2018-08-29
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * --------------------------------------------------------------------------- */
//这个头文件定义了关于每个CPU的私有数据结构，这个结构体存储了与每个 CPU 相关的一些信息。
#ifndef _LOS_PERCPU_PRI_H
#define _LOS_PERCPU_PRI_H

#include "los_base.h"
#include "los_sortlink_pri.h"

#include "arch/cpu.h"

#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */

#ifdef LOSCFG_KERNEL_SMP
typedef enum {
    CPU_RUNNING = 0,   /* cpu is running */
    CPU_HALT,          /* cpu in the halt */
    CPU_EXC            /* cpu in the exc */
} ExcFlag;
#endif
//排序链表的属性结构体，用于表示任务链表和软件定时器链表
typedef struct {
    SortLinkAttribute taskSortLink;             /* task sort link */
#ifdef LOSCFG_BASE_CORE_SWTMR
    SortLinkAttribute swtmrSortLink;            /* swtmr sort link */
#endif

    UINT32 idleTaskId;//空闲任务的任务 ID        /* idle task id */
    UINT32 taskLockCnt;//任务锁计数，用于标记任务是否被锁定                         /* task lock flag */
    UINT32 swtmrHandlerQueue;//软件定时器的超时队列 ID                   /* software timer timeout queue id */
    UINT32 swtmrTaskId;//软件定时器任务的 ID                         /* software timer task id */
    UINT32 schedFlag;//调度标志，用于表示是否需要进行调度                           /* pending scheduler flag */
#ifdef LOSCFG_KERNEL_SMP
    UINT32 excFlag;//CPU 异常标志，用于表示 CPU 的运行状态，包括运行、休眠和异常状态                             /* cpu halt or exc flag */
#ifdef LOSCFG_KERNEL_SMP_CALL
    LOS_DL_LIST funcLink;//多处理器函数调用链表，用于多处理器间的函数调用                       /* mp function call link */
#endif
#endif
} Percpu;

/* the kernel per-cpu structure */
extern Percpu g_percpu[LOSCFG_KERNEL_CORE_NUM];
//用于获取当前CPU
STATIC INLINE Percpu *OsPercpuGet(VOID)
{
    return &g_percpu[ArchCurrCpuid()];
}
//用于获取指定CPU的Percpu结构体指针
STATIC INLINE Percpu *OsPercpuGetByID(UINT32 cpuid)
{
    return &g_percpu[cpuid];
}

#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */

#endif /* _LOS_PERCPU_PRI_H */
