1 /*
2 * Copyright (c) 2006-2021, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 */
9
10 #include <rthw.h>
11 #include <rtthread.h>
12
13 #include "board.h"
14 #include "drv_uart.h"
15 #include "cp15.h"
16
rt_hw_timer_isr(int vector,void * parameter)17 void rt_hw_timer_isr(int vector, void *parameter)
18 {
19 ARM_TIMER_IRQCLR = 0;
20
21 rt_tick_increase();
22 }
23
rt_hw_timer_init(void)24 int rt_hw_timer_init(void)
25 {
26 /* timer_clock = apb_clock/(pre_divider + 1) */
27 ARM_TIMER_PREDIV = (250 - 1);
28
29 ARM_TIMER_RELOAD = 0;
30 ARM_TIMER_LOAD = 0;
31 ARM_TIMER_IRQCLR = 0;
32 ARM_TIMER_CTRL = 0;
33
34 ARM_TIMER_RELOAD = 10000;
35 ARM_TIMER_LOAD = 10000;
36
37 /* 23-bit counter, enable interrupt, enable timer */
38 ARM_TIMER_CTRL = (1 << 1) | (1 << 5) | (1 << 7);
39
40 rt_hw_interrupt_install(IRQ_ARM_TIMER, rt_hw_timer_isr, RT_NULL, "tick");
41 rt_hw_interrupt_umask(IRQ_ARM_TIMER);
42
43 return 0;
44 }
45
vector_copy(void)46 void vector_copy(void)
47 {
48 rt_memcpy((void*)0x0, (void*)0x8000, 64);
49 }
50
rt_hw_board_init(void)51 void rt_hw_board_init(void)
52 {
53 /* initialize hardware interrupt */
54 rt_hw_interrupt_init();
55 rt_hw_vector_init();
56
57 /* initialize uart */
58 rt_hw_uart_init();
59
60 #if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
61 /* set console device */
62 rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
63 #endif
64
65 #ifdef RT_USING_HEAP
66 /* initialize memory system */
67 rt_kprintf("heap: 0x%08x - 0x%08x\n", RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
68 rt_system_heap_init(RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
69 #endif
70
71 /* initialize timer for os tick */
72 rt_hw_timer_init();
73
74 #ifdef RT_USING_COMPONENTS_INIT
75 rt_components_board_init();
76 #endif
77 }
78