add get_second/tick for 3568

Ubiquitous/XiZi_AIoT/hardkernel/clock/arm/armv8-a/cortex-a55/3568/clock.c

@@ -64,7 +64,7 @@ static uint64_t _get_tick()
 
 static uint64_t _get_second()
 {
-    return 0;
+    return _get_tick() / r_cntfrq_el0();
 }
 
 static bool _is_timer_expired()

Ubiquitous/XiZi_AIoT/services/lib/usyscall/usyscall.c

@@ -101,6 +101,20 @@ int show_cpu()
     return syscall(SYSCALL_SYS_STATE, SYS_STATE_SHOW_CPU_INFO, 0, 0, 0);
 }
 
+uintptr_t get_second()
+{
+    sys_state_info info;
+    syscall(SYSCALL_SYS_STATE, SYS_STATE_GET_CURRENT_SECOND, (intptr_t)&info, 0, 0);
+    return info.current_second;
+}
+
+uintptr_t get_tick()
+{
+    sys_state_info info;
+    syscall(SYSCALL_SYS_STATE, SYS_STATE_GET_CURRENT_TICK, (intptr_t)&info, 0, 0);
+    return info.current_tick;
+}
+
 uintptr_t mmap(uintptr_t vaddr, uintptr_t paddr, int len, bool is_dev)
 {
     uintptr_t vaddr_inner = vaddr, paddr_inner = paddr;

Ubiquitous/XiZi_AIoT/services/lib/usyscall/usyscall.h

@@ -99,6 +99,9 @@ int show_task();
 int show_mem();
 int show_cpu();
 
+uintptr_t get_second();
+uintptr_t get_tick();
+
 int semaphore_new(int val);
 bool semaphore_free(int sem_id);
 bool semaphore_wait(int sem_id);