los_tables.h

浏览该文件的文档.

/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * 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.
 */
 
#ifndef _LOS_TABLES_H
#define _LOS_TABLES_H
 
#include "los_typedef.h"
 
#ifdef __cplusplus
#if __cplusplus
extern "C" {
#endif /* __cplusplus */
#endif /* __cplusplus */
/*
HAL层主要功能是实现轻OpenHarmony与芯片的解耦，
*/
 
#ifndef LOS_HAL_TABLE_BEGIN
#define LOS_HAL_TABLE_BEGIN(label, name)                                     \
    __asm__(".section \".liteos.table." X_STRING(name) ".begin\",\"aw\"\n"   \
            ".globl " X_STRING(LOS_LABEL_DEFN(label)) "\n"                   \
            ".type    " X_STRING(LOS_LABEL_DEFN(label)) ",object\n"          \
            ".p2align " X_STRING(LOSARC_P2ALIGNMENT) "\n"                    \
            X_STRING(LOS_LABEL_DEFN(label)) ":\n"                            \
            ".previous\n"                                                    \
            )
#endif
/*
如: LOS_HAL_TABLE_BEGIN(g_shellcmd, shellcmd);
扩展后如下:
.section ".liteos.table.shellcmd.begin","aw"
        .globl g_shellcmd
        .type  g_shellcmd, object
        .p2align 3
g_shellcmd :  
       .previous 
*/
#ifndef LOS_HAL_TABLE_END
#define LOS_HAL_TABLE_END(label, name)                                       \
    __asm__(".section \".liteos.table." X_STRING(name) ".finish\",\"aw\"\n"  \
            ".globl " X_STRING(LOS_LABEL_DEFN(label)) "\n"                   \
            ".type    " X_STRING(LOS_LABEL_DEFN(label)) ",object\n"          \
            ".p2align " X_STRING(LOSARC_P2ALIGNMENT) "\n"                    \
            X_STRING(LOS_LABEL_DEFN(label)) ":\n"                            \
            ".previous\n"                                                    \
            )
#endif
/*
如: LOS_HAL_TABLE_END(g_shellcmdEnd, shellcmd);
扩展后如下:
.section ".liteos.table.shellcmd.finish","aw"
        .globl g_shellcmdEnd
        .type  g_shellcmdEnd, object
        .p2align 3
g_shellcmdEnd :  
       .previous  
*/
 
/* This macro must be applied to any types whose objects are to be placed in tables */
#ifndef LOS_HAL_TABLE_TYPE
#define LOS_HAL_TABLE_TYPE LOSBLD_ATTRIB_ALIGN(LOSARC_ALIGNMENT)
#endif
 
#ifndef LOS_HAL_TABLE_EXTRA
#define LOS_HAL_TABLE_EXTRA(name) \
    LOSBLD_ATTRIB_SECTION(".liteos.table." X_STRING(name) ".extra")
#endif
 
#ifndef LOS_HAL_TABLE_ENTRY
#define LOS_HAL_TABLE_ENTRY(name)                                  \
    LOSBLD_ATTRIB_SECTION(".liteos.table." X_STRING(name) ".data") \
    LOSBLD_ATTRIB_USED
#endif
/*
如: LOS_HAL_TABLE_ENTRY(shellcmd)
扩展后如下:
__attribute__((section(".liteos.table.shellcmd.data")))
__attribute__((used))
*/
#ifndef LOS_HAL_TABLE_QUALIFIED_ENTRY
#define LOS_HAL_TABLE_QUALIFIED_ENTRY(name, _qual)                                  \
    LOSBLD_ATTRIB_SECTION(".liteos.table." X_STRING(name) ".data." X_STRING(_qual)) \
    LOSBLD_ATTRIB_USED
#endif
 
#ifdef __cplusplus
#if __cplusplus
}
#endif /* __cplusplus */
#endif /* __cplusplus */
 
#endif /* _LOS_TABLES_H */