[bsp][simulator] 支持自动初始化及用户 main 入口

2 files changed, 337 insertions, 0 deletions

diff --git a/libcpu/sim/win32/cpu_port.c b/libcpu/sim/win32/cpu_port.c
index 621420e7bf..b7510819b9 100644
--- a/libcpu/sim/win32/cpu_port.c
+++ b/libcpu/sim/win32/cpu_port.c
@@ -699,3 +699,14 @@ rt_uint32_t YieldInterruptHandle(void)
 
     return 0;
 } /*** YieldInterruptHandle ***/
+
+/* system entry */
+extern int rtthread_startup(void);
+int wmain(int argc, char* argv[])
+{
+    /* disable interrupt first */
+    rt_hw_interrupt_disable();
+    /* startup RT-Thread RTOS */
+    rtthread_startup();
+}
+#pragma comment(linker, "/subsystem:console /entry:wmainCRTStartup")
diff --git a/libcpu/sim/win32/startup.c b/libcpu/sim/win32/startup.c
new file mode 100644
index 0000000000..756d409315
--- /dev/null
+++ b/libcpu/sim/win32/startup.c
@@ -0,0 +1,326 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-12-04     tyx          first implementation
+ */
+
+#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
+#ifndef RT_MAIN_THREAD_PRIORITY
+#define RT_MAIN_THREAD_PRIORITY       (RT_THREAD_PRIORITY_MAX / 3)
+#endif
+#endif
+
+#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.
+ */
+
+#pragma section("rti_fn$a", read)
+const char __rti_fn_begin_name[] = "__rti_fn_start";
+__declspec(allocate("rti_fn$a")) const struct rt_init_desc __rti_fn_begin =
+{
+    __rti_fn_begin_name,
+    NULL
+};
+
+#pragma section("rti_fn$z", read)
+const char __rti_fn_end_name[] = "__rti_fn_end";
+__declspec(allocate("rti_fn$z")) const struct rt_init_desc __rti_fn_end =
+{
+    __rti_fn_end_name,
+    NULL
+};
+
+static int rti_start(void)
+{
+    return 0;
+}
+INIT_EXPORT(rti_start, "0");
+
+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");
+
+/**
+ * Find next init function
+ */
+static const struct rt_init_desc* rt_init_find_next(const char* lv,
+    unsigned int* begin, unsigned int* end)
+{
+    const struct rt_init_desc* ptr;
+    const struct rt_init_desc* ret_ptr = RT_NULL;
+
+    while (begin < end)
+    {
+        if (*begin != 0)
+        {
+            ptr = (const struct rt_init_desc*)begin;
+            if (ret_ptr != RT_NULL)
+            {
+                if (rt_strcmp(lv, ptr->level) < 0 &&
+                    rt_strcmp(ret_ptr->level, ptr->level) > 0)
+                {
+                    ret_ptr = ptr;
+                }
+            }
+            else
+            {
+                if (rt_strcmp(lv, ptr->level) < 0)
+                {
+                    ret_ptr = ptr;
+                }
+            }
+            begin += (sizeof(struct rt_init_desc) / sizeof(unsigned int));
+        }
+        else
+        {
+            begin++;
+        }
+    }
+    return ret_ptr;
+}
+
+/**
+ * RT-Thread Components Initialization for board
+ */
+void rt_components_board_init(void)
+{
+    const struct rt_init_desc* ptr;
+    const char* lv_start = "0__rt_init_rti_start";
+    const char* lv_end = "1_end__rt_init_rti_board_end";
+    unsigned int* ptr_begin = (unsigned int*)&__rti_fn_begin;
+    unsigned int* ptr_end = (unsigned int*)&__rti_fn_end;
+    int result;
+
+    ptr_begin += (sizeof(struct rt_init_desc) / sizeof(unsigned int));
+    while (*ptr_begin == 0) ptr_begin++;
+    do ptr_end--; while (*ptr_end == 0);
+
+    while (1)
+    {
+        ptr = rt_init_find_next(lv_start, ptr_begin, ptr_end);
+        if (ptr == RT_NULL ||
+            rt_strcmp(ptr->level, lv_end) >= 0)
+        {
+            break;
+        }
+        if (ptr->fn)
+        {
+#if RT_DEBUG_INIT
+            rt_kprintf("initialize %s", ptr->fn_name);
+            result = ptr->fn();
+            rt_kprintf(":%d done\n", result);
+#else
+            result = ptr->fn();
+#endif
+        }
+        lv_start = ptr->level;
+    };
+}
+
+/**
+ * RT-Thread Components Initialization
+ */
+void rt_components_init(void)
+{
+    const struct rt_init_desc* ptr;
+    const char* lv_start = "1_end__rt_init_rti_board_end";
+    const char* lv_end = "6_end__rt_init_rti_end";
+    unsigned int* ptr_begin = (unsigned int*)&__rti_fn_begin;
+    unsigned int* ptr_end = (unsigned int*)&__rti_fn_end;
+    int result;
+
+    ptr_begin += (sizeof(struct rt_init_desc) / sizeof(unsigned int));
+    while (*ptr_begin == 0) ptr_begin++;
+    do ptr_end--; while (*ptr_end == 0);
+
+    while (1)
+    {
+        ptr = rt_init_find_next(lv_start, ptr_begin, ptr_end);
+        if (ptr == RT_NULL ||
+            rt_strcmp(ptr->level, lv_end) >= 0)
+        {
+            break;
+        }
+        if (ptr->fn)
+        {
+#if RT_DEBUG_INIT
+            rt_kprintf("initialize %s", ptr->fn_name);
+            result = ptr->fn();
+            rt_kprintf(":%d done\n", result);
+#else
+            result = ptr->fn();
+#endif
+        }
+        lv_start = ptr->level;
+    };
+}
+#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);
+
+#if defined(__CC_ARM) || defined(__CLANG_ARM)
+extern int $Super$$main(void);
+/* re-define main function */
+int $Sub$$main(void)
+{
+    rtthread_startup();
+    return 0;
+}
+#elif defined(__ICCARM__)
+extern int main(void);
+/* __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. */
+ALIGN(8)
+static rt_uint8_t main_stack[RT_MAIN_THREAD_STACK_SIZE];
+struct rt_thread main_thread;
+#endif
+
+/* the system main thread */
+void main_thread_entry(void *parameter)
+{
+    extern int main(void);
+
+#ifdef RT_USING_COMPONENTS_INIT
+    /* RT-Thread components initialization */
+    rt_components_init();
+#endif
+
+#ifdef RT_USING_SMP
+    rt_hw_secondary_cpu_up();
+#endif
+    /* invoke system main function */
+#if defined(__CC_ARM) || defined(__CLANG_ARM)
+    {
+        extern int $Super$$main(void);
+        $Super$$main(); /* for ARMCC. */
+    }
+#elif defined(__ICCARM__) || defined(__GNUC__) || defined(__TASKING__) || defined(_MSC_VER)
+    main();
+#endif
+}
+
+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_stack, sizeof(main_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_thread_startup(tid);
+}
+
+int rtthread_startup(void)
+{
+    rt_hw_interrupt_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
+
+    /* create init_thread */
+    rt_application_init();
+
+    /* timer thread initialization */
+    rt_system_timer_thread_init();
+
+    /* idle thread initialization */
+    rt_thread_idle_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