initial versioin

code/os/06-interrupts/kernel.c

@@ -0,0 +1,35 @@
+#include "os.h"
+
+/*
+ * Following functions SHOULD be called ONLY ONE time here,
+ * so just declared here ONCE and NOT included in file os.h.
+ */
+extern void uart_init(void);
+extern void page_init(void);
+extern void sched_init(void);
+extern void schedule(void);
+extern void os_main(void);
+extern void trap_init(void);
+extern void plic_init(void);
+
+void start_kernel(void)
+{
+	uart_init();
+	uart_puts("Hello, RVOS!\n");
+
+	page_init();
+
+	trap_init();
+
+	plic_init();
+
+	sched_init();
+
+	os_main();
+
+	schedule();
+
+	uart_puts("Would not go here!\n");
+	while (1) {}; // stop here!
+}
+