!225 fix: 在内核初始化前期启动tick timer

Merge pull request !225 from zhushengle/tick

kernel/src/los_init.c

@@ -101,7 +101,7 @@ LITE_OS_SEC_TEXT_INIT static VOID OsRegister(VOID)
 
 LITE_OS_SEC_TEXT_INIT UINT32 LOS_Start(VOID)
 {
-    return HalStartSchedule(OsTickHandler);
+    return HalStartSchedule();
 }
 
 /*****************************************************************************

kernel/src/los_sched.c

@@ -91,10 +91,6 @@ VOID OsSchedTimerBaseReset(UINT64 currTime)
 
 UINT64 OsGetCurrSchedTimeCycle(VOID)
 {
-    if (!g_taskScheduled) {
-        return 0;
-    }
-
 #if (LOSCFG_BASE_CORE_TICK_WTIMER == 1)
     return HalGetTickCycle(NULL);
 #else
@@ -527,7 +523,9 @@ VOID LOS_SchedTickHandler(VOID)
     UINT64 currTime;
     BOOL needSched = FALSE;
 
-    LOS_ASSERT(g_taskScheduled);
+    if (!g_taskScheduled) {
+        return;
+    }
 
     UINT32 intSave = LOS_IntLock();