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 * 2020-04-16 bigmagic first version
9 */
10
11 #include <rthw.h>
12 #include <rtthread.h>
13
14 #include "board.h"
15 #include "drv_uart.h"
16
17 #include "cp15.h"
18 #include "mmu.h"
19 #include "mbox.h"
20
21 struct mem_desc platform_mem_desc[] = {
22 {0x0, 0x6400000, 0x0, NORMAL_MEM},
23 {0x8000000, 0x8800000, 0x8000000, DEVICE_MEM}, //mbox msg
24 {0x0E000000, 0x0EE00000, 0x0E000000, DEVICE_MEM}, //framebuffer
25 {0x0F400000, 0x0FA00000, 0x0F400000, DEVICE_MEM}, //dsi_touch
26 {0xFD500000, 0xFDA00000, 0xFD500000, DEVICE_MEM}, //gmac
27 {0xFE000000, 0xFF000000, 0xFE000000, DEVICE_MEM}, //peripheral
28 {0xFF800000, 0xFFA00000, 0xFF800000, DEVICE_MEM} //gic
29 };
30
31 const rt_uint32_t platform_mem_desc_size = sizeof(platform_mem_desc)/sizeof(platform_mem_desc[0]);
32
rt_hw_timer_isr(int vector,void * parameter)33 void rt_hw_timer_isr(int vector, void *parameter)
34 {
35 ARM_TIMER_IRQCLR = 0;
36 rt_tick_increase();
37 }
38
rt_hw_timer_init(void)39 void rt_hw_timer_init(void)
40 {
41 rt_uint32_t apb_clock = 0;
42 rt_uint32_t timer_clock = 1000000;
43 /* timer_clock = apb_clock/(pre_divider + 1) */
44 apb_clock = bcm271x_mbox_clock_get_rate(CORE_CLK_ID);
45 ARM_TIMER_PREDIV = (apb_clock/timer_clock - 1);
46
47 ARM_TIMER_RELOAD = 0;
48 ARM_TIMER_LOAD = 0;
49 ARM_TIMER_IRQCLR = 0;
50 ARM_TIMER_CTRL = 0;
51
52 ARM_TIMER_RELOAD = 1000000/RT_TICK_PER_SECOND;
53 ARM_TIMER_LOAD = 1000000/RT_TICK_PER_SECOND;
54
55 /* 23-bit counter, enable interrupt, enable timer */
56 ARM_TIMER_CTRL = (1 << 1) | (1 << 5) | (1 << 7);
57
58 rt_hw_interrupt_install(ARM_TIMER_IRQ, rt_hw_timer_isr, RT_NULL, "tick");
59 rt_hw_interrupt_umask(ARM_TIMER_IRQ);
60 }
61
idle_wfi(void)62 void idle_wfi(void)
63 {
64 asm volatile ("wfi");
65 }
66
67 /**
68 * Initialize the Hardware related stuffs. Called from rtthread_startup()
69 * after interrupt disabled.
70 */
rt_hw_board_init(void)71 void rt_hw_board_init(void)
72 {
73 rt_hw_init_mmu_table(platform_mem_desc,platform_mem_desc_size);
74 rt_hw_mmu_init();
75 /* initialize hardware interrupt */
76 rt_hw_interrupt_init();
77 /* initialize uart */
78 rt_hw_uart_init(); // driver/drv_uart.c
79 #if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
80 /* set console device */
81 rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
82 #endif
83
84 #ifdef RT_USING_HEAP
85 /* initialize memory system */
86 rt_kprintf("heap: 0x%08x - 0x%08x\n", RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
87 rt_system_heap_init(RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
88 #endif
89 /* initialize timer for os tick */
90 rt_hw_timer_init();
91 rt_thread_idle_sethook(idle_wfi);
92
93 #ifdef RT_USING_COMPONENTS_INIT
94 rt_components_board_init();
95 #endif
96 }
97