rt-thread/bsp/raspberry-pi/raspi4-32/driver/board.c

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/*
* Copyright (c) 2006-2020, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-04-16 bigmagic first version
*/
#include <rthw.h>
#include <rtthread.h>
#include "board.h"
#include "drv_uart.h"
#include "cp15.h"
#include "mmu.h"
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#include "mbox.h"
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struct mem_desc platform_mem_desc[] = {
{0x0, 0x6400000, 0x0, NORMAL_MEM},
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{0x8000000, 0x8800000, 0x8000000, DEVICE_MEM}, //mbox msg
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{0x0EA00000, 0x0EE00000, 0x0EA00000, DEVICE_MEM}, //framebuffer
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{0xFD500000, 0xFDA00000, 0xFD500000, DEVICE_MEM}, //gmac
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{0xFE000000, 0xFE400000, 0xFE000000, DEVICE_MEM}, //peripheral
{0xFF800000, 0xFFA00000, 0xFF800000, DEVICE_MEM} //gic
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};
const rt_uint32_t platform_mem_desc_size = sizeof(platform_mem_desc)/sizeof(platform_mem_desc[0]);
void rt_hw_timer_isr(int vector, void *parameter)
{
ARM_TIMER_IRQCLR = 0;
rt_tick_increase();
}
void rt_hw_timer_init(void)
{
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rt_uint32_t apb_clock = 0;
rt_uint32_t timer_clock = 1000000;
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/* timer_clock = apb_clock/(pre_divider + 1) */
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apb_clock = bcm271x_mbox_clock_get_rate(CORE_CLK_ID);
ARM_TIMER_PREDIV = (apb_clock/timer_clock - 1);
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ARM_TIMER_RELOAD = 0;
ARM_TIMER_LOAD = 0;
ARM_TIMER_IRQCLR = 0;
ARM_TIMER_CTRL = 0;
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ARM_TIMER_RELOAD = 1000000/RT_TICK_PER_SECOND;
ARM_TIMER_LOAD = 1000000/RT_TICK_PER_SECOND;
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/* 23-bit counter, enable interrupt, enable timer */
ARM_TIMER_CTRL = (1 << 1) | (1 << 5) | (1 << 7);
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rt_hw_interrupt_install(ARM_TIMER_IRQ, rt_hw_timer_isr, RT_NULL, "tick");
rt_hw_interrupt_umask(ARM_TIMER_IRQ);
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}
void idle_wfi(void)
{
asm volatile ("wfi");
}
/**
* Initialize the Hardware related stuffs. Called from rtthread_startup()
* after interrupt disabled.
*/
void rt_hw_board_init(void)
{
/* initialize hardware interrupt */
rt_hw_interrupt_init();
/* initialize uart */
rt_hw_uart_init(); // driver/drv_uart.c
#ifdef RT_USING_CONSOLE
/* set console device */
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif /* RT_USING_CONSOLE */
#ifdef RT_USING_HEAP
/* initialize memory system */
rt_kprintf("heap: 0x%08x - 0x%08x\n", RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
rt_system_heap_init(RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
#endif
/* initialize timer for os tick */
rt_hw_timer_init();
rt_thread_idle_sethook(idle_wfi);
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
}