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@@ -0,0 +1,326 @@
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+/*
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+ * SPDX-License-Identifier: Apache-2.0
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+ *
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+ * Change Logs:
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+ * Date Author Notes
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+ * 2020-12-04 tyx first implementation
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+ */
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+
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+#include <rthw.h>
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+#include <rtthread.h>
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+
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+#ifdef RT_USING_USER_MAIN
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+#ifndef RT_MAIN_THREAD_STACK_SIZE
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+#define RT_MAIN_THREAD_STACK_SIZE 2048
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+#endif
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+#ifndef RT_MAIN_THREAD_PRIORITY
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+#define RT_MAIN_THREAD_PRIORITY (RT_THREAD_PRIORITY_MAX / 3)
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+#endif
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+#endif
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+
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+#ifdef RT_USING_COMPONENTS_INIT
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+/*
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+ * Components Initialization will initialize some driver and components as following
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+ * order:
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+ * rti_start --> 0
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+ * BOARD_EXPORT --> 1
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+ * rti_board_end --> 1.end
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+ *
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+ * DEVICE_EXPORT --> 2
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+ * COMPONENT_EXPORT --> 3
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+ * FS_EXPORT --> 4
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+ * ENV_EXPORT --> 5
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+ * APP_EXPORT --> 6
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+ *
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+ * rti_end --> 6.end
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+ *
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+ * These automatically initialization, the driver or component initial function must
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+ * be defined with:
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+ * INIT_BOARD_EXPORT(fn);
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+ * INIT_DEVICE_EXPORT(fn);
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+ * ...
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+ * INIT_APP_EXPORT(fn);
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+ * etc.
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+ */
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+
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+#pragma section("rti_fn$a", read)
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+const char __rti_fn_begin_name[] = "__rti_fn_start";
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+__declspec(allocate("rti_fn$a")) const struct rt_init_desc __rti_fn_begin =
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+{
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+ __rti_fn_begin_name,
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+ NULL
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+};
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+
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+#pragma section("rti_fn$z", read)
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+const char __rti_fn_end_name[] = "__rti_fn_end";
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+__declspec(allocate("rti_fn$z")) const struct rt_init_desc __rti_fn_end =
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+{
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+ __rti_fn_end_name,
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+ NULL
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+};
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+
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+static int rti_start(void)
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+{
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+ return 0;
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+}
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+INIT_EXPORT(rti_start, "0");
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+
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+static int rti_board_end(void)
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+{
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+ return 0;
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+}
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+INIT_EXPORT(rti_board_end, "1_end");
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+
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+static int rti_end(void)
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+{
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+ return 0;
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+}
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+INIT_EXPORT(rti_end, "6_end");
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+
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+/**
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+ * Find next init function
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+ */
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+static const struct rt_init_desc* rt_init_find_next(const char* lv,
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+ unsigned int* begin, unsigned int* end)
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+{
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+ const struct rt_init_desc* ptr;
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+ const struct rt_init_desc* ret_ptr = RT_NULL;
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+
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+ while (begin < end)
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+ {
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+ if (*begin != 0)
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+ {
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+ ptr = (const struct rt_init_desc*)begin;
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+ if (ret_ptr != RT_NULL)
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+ {
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+ if (rt_strcmp(lv, ptr->level) < 0 &&
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+ rt_strcmp(ret_ptr->level, ptr->level) > 0)
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+ {
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+ ret_ptr = ptr;
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+ }
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+ }
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+ else
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+ {
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+ if (rt_strcmp(lv, ptr->level) < 0)
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+ {
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+ ret_ptr = ptr;
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+ }
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+ }
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+ begin += (sizeof(struct rt_init_desc) / sizeof(unsigned int));
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+ }
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+ else
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+ {
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+ begin++;
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+ }
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+ }
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+ return ret_ptr;
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+}
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+
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+/**
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+ * RT-Thread Components Initialization for board
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+ */
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+void rt_components_board_init(void)
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+{
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+ const struct rt_init_desc* ptr;
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+ const char* lv_start = "0__rt_init_rti_start";
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+ const char* lv_end = "1_end__rt_init_rti_board_end";
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+ unsigned int* ptr_begin = (unsigned int*)&__rti_fn_begin;
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+ unsigned int* ptr_end = (unsigned int*)&__rti_fn_end;
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+ int result;
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+
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+ ptr_begin += (sizeof(struct rt_init_desc) / sizeof(unsigned int));
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+ while (*ptr_begin == 0) ptr_begin++;
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+ do ptr_end--; while (*ptr_end == 0);
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+
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+ while (1)
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+ {
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+ ptr = rt_init_find_next(lv_start, ptr_begin, ptr_end);
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+ if (ptr == RT_NULL ||
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+ rt_strcmp(ptr->level, lv_end) >= 0)
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+ {
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+ break;
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+ }
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+ if (ptr->fn)
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+ {
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+#if RT_DEBUG_INIT
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+ rt_kprintf("initialize %s", ptr->fn_name);
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+ result = ptr->fn();
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+ rt_kprintf(":%d done\n", result);
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+#else
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+ result = ptr->fn();
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+#endif
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+ }
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+ lv_start = ptr->level;
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+ };
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+}
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+
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+/**
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+ * RT-Thread Components Initialization
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+ */
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+void rt_components_init(void)
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+{
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+ const struct rt_init_desc* ptr;
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+ const char* lv_start = "1_end__rt_init_rti_board_end";
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+ const char* lv_end = "6_end__rt_init_rti_end";
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+ unsigned int* ptr_begin = (unsigned int*)&__rti_fn_begin;
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+ unsigned int* ptr_end = (unsigned int*)&__rti_fn_end;
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+ int result;
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+
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+ ptr_begin += (sizeof(struct rt_init_desc) / sizeof(unsigned int));
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+ while (*ptr_begin == 0) ptr_begin++;
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+ do ptr_end--; while (*ptr_end == 0);
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+
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+ while (1)
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+ {
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+ ptr = rt_init_find_next(lv_start, ptr_begin, ptr_end);
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+ if (ptr == RT_NULL ||
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+ rt_strcmp(ptr->level, lv_end) >= 0)
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+ {
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+ break;
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+ }
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+ if (ptr->fn)
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+ {
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+#if RT_DEBUG_INIT
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+ rt_kprintf("initialize %s", ptr->fn_name);
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+ result = ptr->fn();
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+ rt_kprintf(":%d done\n", result);
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+#else
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+ result = ptr->fn();
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+#endif
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+ }
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+ lv_start = ptr->level;
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+ };
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+}
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+#endif /* RT_USING_COMPONENTS_INIT */
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+
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+#ifdef RT_USING_USER_MAIN
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+
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+void rt_application_init(void);
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+void rt_hw_board_init(void);
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+int rtthread_startup(void);
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+
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+#if defined(__CC_ARM) || defined(__CLANG_ARM)
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+extern int $Super$$main(void);
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+/* re-define main function */
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+int $Sub$$main(void)
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+{
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+ rtthread_startup();
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+ return 0;
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+}
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+#elif defined(__ICCARM__)
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+extern int main(void);
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+/* __low_level_init will auto called by IAR cstartup */
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+extern void __iar_data_init3(void);
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+int __low_level_init(void)
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+{
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+ // call IAR table copy function.
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+ __iar_data_init3();
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+ rtthread_startup();
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+ return 0;
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+}
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+#elif defined(__GNUC__)
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+/* Add -eentry to arm-none-eabi-gcc argument */
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+int entry(void)
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+{
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+ rtthread_startup();
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+ return 0;
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+}
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+#endif
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+
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+#ifndef RT_USING_HEAP
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+/* if there is not enable heap, we should use static thread and stack. */
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+ALIGN(8)
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+static rt_uint8_t main_stack[RT_MAIN_THREAD_STACK_SIZE];
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+struct rt_thread main_thread;
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+#endif
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+
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+/* the system main thread */
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+void main_thread_entry(void *parameter)
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+{
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+ extern int main(void);
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+
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+#ifdef RT_USING_COMPONENTS_INIT
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+ /* RT-Thread components initialization */
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+ rt_components_init();
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+#endif
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+
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+#ifdef RT_USING_SMP
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+ rt_hw_secondary_cpu_up();
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+#endif
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+ /* invoke system main function */
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+#if defined(__CC_ARM) || defined(__CLANG_ARM)
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+ {
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+ extern int $Super$$main(void);
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+ $Super$$main(); /* for ARMCC. */
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+ }
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+#elif defined(__ICCARM__) || defined(__GNUC__) || defined(__TASKING__) || defined(_MSC_VER)
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+ main();
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+#endif
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+}
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+
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+void rt_application_init(void)
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+{
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+ rt_thread_t tid;
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+
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+#ifdef RT_USING_HEAP
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+ tid = rt_thread_create("main", main_thread_entry, RT_NULL,
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+ RT_MAIN_THREAD_STACK_SIZE, RT_MAIN_THREAD_PRIORITY, 20);
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+ RT_ASSERT(tid != RT_NULL);
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+#else
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+ rt_err_t result;
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+
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+ tid = &main_thread;
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+ result = rt_thread_init(tid, "main", main_thread_entry, RT_NULL,
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+ main_stack, sizeof(main_stack), RT_MAIN_THREAD_PRIORITY, 20);
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+ RT_ASSERT(result == RT_EOK);
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+
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+ /* if not define RT_USING_HEAP, using to eliminate the warning */
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+ (void)result;
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+#endif
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+
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+ rt_thread_startup(tid);
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+}
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+
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+int rtthread_startup(void)
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+{
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+ rt_hw_interrupt_disable();
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+
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+ /* board level initialization
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+ * NOTE: please initialize heap inside board initialization.
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+ */
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+ rt_hw_board_init();
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+
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+ /* show RT-Thread version */
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+ rt_show_version();
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+
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+ /* timer system initialization */
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+ rt_system_timer_init();
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+
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+ /* scheduler system initialization */
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+ rt_system_scheduler_init();
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+
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+#ifdef RT_USING_SIGNALS
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+ /* signal system initialization */
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+ rt_system_signal_init();
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+#endif
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+
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+ /* create init_thread */
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+ rt_application_init();
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+
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+ /* timer thread initialization */
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+ rt_system_timer_thread_init();
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+
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+ /* idle thread initialization */
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+ rt_thread_idle_init();
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+
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+#ifdef RT_USING_SMP
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+ rt_hw_spin_lock(&_cpus_lock);
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+#endif /*RT_USING_SMP*/
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+
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+ /* start scheduler */
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+ rt_system_scheduler_start();
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+
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+ /* never reach here */
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+ return 0;
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+}
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+#endif
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tangyuxin