将mstStartup和slvStartup代码合二为一；增加mtime的驱动代码

tb/sw/src/clint.h

@@ -0,0 +1,38 @@
+#ifndef __CLINT_H__
+#define __CLINT_H__
+
+
+
+
+#define CLINT_MTIME_TICK_PERIOD         4 //ns
+
+
+#define CLINT_BASE                  (0x2000000)
+#define CLINT_MTIME_LOW             (0xBFF8)
+#define CLINT_MTIME_HIGH            (0xBFFC)
+#define CLINT_MTIMECMP_LOW          (0x4000)
+#define CLINT_MTIMECMP_HIGH         (0x4004)
+
+
+#ifndef __ASSEMBLER__
+
+#include "stdint.h"
+extern volatile const uint32_t * const mtime_high;
+extern volatile const uint32_t * const mtime_low;
+extern volatile uint32_t * const mtimecmp_high;
+extern volatile uint32_t * const mtimecmp_low;
+
+extern volatile uint32_t mtimer_int_flag;
+
+uint64_t read_timer(void);
+void set_mtimecmp(uint64_t value) ;
+void enable_mtimer_int();
+void disable_mtimer_int();
+void set_mtimer(uint32_t delta_t);
+
+#endif
+
+
+#endif
+
+