1 /*
2  * Assembly Macros For MIPS
3  *
4  * Copyright (c) 2006-2021, RT-Thread Development Team
5  *
6  * SPDX-License-Identifier: Apache-2.0
7  *
8  * Change Logs:
9  * Date           Author       Notes
10  * 2019-12-04     Jiaxun Yang  Initial version
11  */
12 
13 #include <rtthread.h>
14 #include <rthw.h>
15 #include <mips.h>
16 #include <board.h>
17 
18 /**
19  * This is the timer interrupt service routine.
20  */
rt_hw_timer_handler(void)21 void rt_hw_timer_handler(void)
22 {
23     unsigned int count;
24 
25     count = read_c0_compare();
26     write_c0_compare(count);
27     write_c0_count(0);
28 
29     /* increase a OS tick */
30     rt_tick_increase();
31 }
32 
33 /**
34  * This function will initial OS timer
35  */
rt_hw_timer_init(void)36 void rt_hw_timer_init(void)
37 {
38     write_c0_compare(CPU_HZ/2/RT_TICK_PER_SECOND);
39     write_c0_count(0);
40     mips_unmask_cpu_irq(7);
41 }
42