components.c

浏览该文件的文档.

/*
 * Copyright (c) 2006-2022, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2012-09-20     Bernard      Change the name to components.c
 *                             And all components related header files.
 * 2012-12-23     Bernard      fix the pthread initialization issue.
 * 2013-06-23     Bernard      Add the init_call for components initialization.
 * 2013-07-05     Bernard      Remove initialization feature for MS VC++ compiler
 * 2015-02-06     Bernard      Remove the MS VC++ support and move to the kernel
 * 2015-05-04     Bernard      Rename it to components.c because compiling issue
 *                             in some IDEs.
 * 2015-07-29     Arda.Fu      Add support to use RT_USING_USER_MAIN with IAR
 * 2018-11-22     Jesven       Add secondary cpu boot up
 * 2023-09-15     xqyjlj       perf rt_hw_interrupt_disable/enable
 */
 
#include <rthw.h>
#include <rtthread.h>
 
#ifdef RT_USING_USER_MAIN
#ifndef RT_MAIN_THREAD_STACK_SIZE
#define RT_MAIN_THREAD_STACK_SIZE     2048
#endif /* RT_MAIN_THREAD_STACK_SIZE */
#ifndef RT_MAIN_THREAD_PRIORITY
#define RT_MAIN_THREAD_PRIORITY       (RT_THREAD_PRIORITY_MAX / 3)
#endif /* RT_MAIN_THREAD_PRIORITY */
#endif /* RT_USING_USER_MAIN */
 
#ifdef RT_USING_COMPONENTS_INIT
/*
 * Components Initialization will initialize some driver and components as following
 * order:
 * rti_start         --> 0
 * BOARD_EXPORT      --> 1
 * rti_board_end     --> 1.end
 *
 * DEVICE_EXPORT     --> 2
 * COMPONENT_EXPORT  --> 3
 * FS_EXPORT         --> 4
 * ENV_EXPORT        --> 5
 * APP_EXPORT        --> 6
 *
 * rti_end           --> 6.end
 *
 * These automatically initialization, the driver or component initial function must
 * be defined with:
 * INIT_BOARD_EXPORT(fn);
 * INIT_DEVICE_EXPORT(fn);
 * ...
 * INIT_APP_EXPORT(fn);
 * etc.
 */
static int rti_start(void)
{
    return 0;
}
INIT_EXPORT(rti_start, "0");
 
static int rti_board_start(void)
{
    return 0;
}
INIT_EXPORT(rti_board_start, "0.end");
 
static int rti_board_end(void)
{
    return 0;
}
INIT_EXPORT(rti_board_end, "1.end");
 
static int rti_end(void)
{
    return 0;
}
INIT_EXPORT(rti_end, "6.end");

void rt_components_board_init(void)
{
#ifdef RT_DEBUGING_AUTO_INIT
    int result;
    const struct rt_init_desc *desc;
    for (desc = &__rt_init_desc_rti_board_start; desc < &__rt_init_desc_rti_board_end; desc ++)
    {
        rt_kprintf("initialize %s\n", desc->fn_name);
        result = desc->fn();
        rt_kprintf(":%d done\n", result);
    }
#else
    volatile const init_fn_t *fn_ptr;
 
    for (fn_ptr = &__rt_init_rti_board_start; fn_ptr < &__rt_init_rti_board_end; fn_ptr++)
    {
        (*fn_ptr)();
    }
#endif /* RT_DEBUGING_AUTO_INIT */
}

void rt_components_init(void)
{
#ifdef RT_DEBUGING_AUTO_INIT
    int result;
    const struct rt_init_desc *desc;
 
    rt_kprintf("do components initialization.\n");
    for (desc = &__rt_init_desc_rti_board_end; desc < &__rt_init_desc_rti_end; desc ++)
    {
        rt_kprintf("initialize %s\n", desc->fn_name);
        result = desc->fn();
        rt_kprintf(":%d done\n", result);
    }
#else
    volatile const init_fn_t *fn_ptr;
 
    for (fn_ptr = &__rt_init_rti_board_end; fn_ptr < &__rt_init_rti_end; fn_ptr ++)
    {
        (*fn_ptr)();
    }
#endif /* RT_DEBUGING_AUTO_INIT */
}
#endif /* RT_USING_COMPONENTS_INIT */
 
#ifdef RT_USING_USER_MAIN
 
void rt_application_init(void);
void rt_hw_board_init(void);
int rtthread_startup(void);
 
#ifdef __ARMCC_VERSION
extern int $Super$$main(void);
/* re-define main function */
int $Sub$$main(void)
{
    rtthread_startup();
    return 0;
}
#elif defined(__ICCARM__)
/* __low_level_init will auto called by IAR cstartup */
extern void __iar_data_init3(void);
int __low_level_init(void)
{
    // call IAR table copy function.
    __iar_data_init3();
    rtthread_startup();
    return 0;
}
#elif defined(__GNUC__)
/* Add -eentry to arm-none-eabi-gcc argument */
int entry(void)
{
    rtthread_startup();
    return 0;
}
#endif
 
#ifndef RT_USING_HEAP
/* if there is not enable heap, we should use static thread and stack. */
rt_align(RT_ALIGN_SIZE)
static rt_uint8_t main_thread_stack[RT_MAIN_THREAD_STACK_SIZE];
struct rt_thread main_thread;
#endif /* RT_USING_HEAP */

static void main_thread_entry(void *parameter)
{
    extern int main(void);
    RT_UNUSED(parameter);
 
#ifdef RT_USING_COMPONENTS_INIT
    /* RT-Thread components initialization */
    rt_components_init();
#endif /* RT_USING_COMPONENTS_INIT */
 
#ifdef RT_USING_SMP
    rt_hw_secondary_cpu_up();
#endif /* RT_USING_SMP */
    /* invoke system main function */
#ifdef __ARMCC_VERSION
    {
        extern int $Super$$main(void);
        $Super$$main(); /* for ARMCC. */
    }
#elif defined(__ICCARM__) || defined(__GNUC__) || defined(__TASKING__) || defined(__TI_COMPILER_VERSION__)
    main();
#endif /* __ARMCC_VERSION */
}

void rt_application_init(void)
{
    rt_thread_t tid;
 
#ifdef RT_USING_HEAP
    tid = rt_thread_create("main", main_thread_entry, RT_NULL,
                           RT_MAIN_THREAD_STACK_SIZE, RT_MAIN_THREAD_PRIORITY, 20);
    RT_ASSERT(tid != RT_NULL);
#else
    rt_err_t result;
 
    tid = &main_thread;
    result = rt_thread_init(tid, "main", main_thread_entry, RT_NULL,
                            main_thread_stack, sizeof(main_thread_stack), RT_MAIN_THREAD_PRIORITY, 20);
    RT_ASSERT(result == RT_EOK);
 
    /* if not define RT_USING_HEAP, using to eliminate the warning */
    (void)result;
#endif /* RT_USING_HEAP */
 
    rt_thread_startup(tid);
}

int rtthread_startup(void)
{
#ifdef RT_USING_SMP
    rt_hw_spin_lock_init(&_cpus_lock);
#endif
    rt_hw_local_irq_disable();
 
    /* board level initialization
     * NOTE: please initialize heap inside board initialization.
     */
    rt_hw_board_init();
 
    /* show RT-Thread version */
    rt_show_version();
 
    /* timer system initialization */
    rt_system_timer_init();
 
    /* scheduler system initialization */
    rt_system_scheduler_init();
 
#ifdef RT_USING_SIGNALS
    /* signal system initialization */
    rt_system_signal_init();
#endif /* RT_USING_SIGNALS */
 
    /* create init_thread */
    rt_application_init();
 
    /* timer thread initialization */
    rt_system_timer_thread_init();
 
    /* idle thread initialization */
    rt_thread_idle_init();
 
    /* defunct thread initialization */
    rt_thread_defunct_init();
 
#ifdef RT_USING_SMP
    rt_hw_spin_lock(&_cpus_lock);
#endif /* RT_USING_SMP */
 
    /* start scheduler */
    rt_system_scheduler_start();
 
    /* never reach here */
    return 0;
}
#endif /* RT_USING_USER_MAIN */