DragonOS/kernel/main.c
2022-01-29 15:12:34 +08:00

133 lines
3.3 KiB
C

//
// Created by longjin on 2022/1/20.
//
#include "common/glib.h"
#include "common/printk.h"
#include "exception/gate.h"
#include "exception/trap.h"
#include "exception/irq.h"
#include "mm/mm.h"
#include "common/kprint.h"
int *FR_address = (int *)0xffff800000a00000; //帧缓存区的地址
//char fxsave_region[512] __attribute__((aligned(16)));
struct memory_desc memory_management_struct = {{0}, 0};
void show_welcome()
{
/**
* @brief 打印欢迎页面
*
*/
printk("\n\n");
for (int i = 0; i < 74; ++i)
printk(" ");
printk_color(0x00e0ebeb, 0x00e0ebeb, " \n");
for (int i = 0; i < 74; ++i)
printk(" ");
printk_color(BLACK, 0x00e0ebeb, " Welcome to DragonOS ! \n");
for (int i = 0; i < 74; ++i)
printk(" ");
printk_color(0x00e0ebeb, 0x00e0ebeb, " \n\n");
}
void test_printk()
{
//测试直接输出
printk("\nTesting printk...\n");
//测试输出单个字符
printk("%c\n", 't');
//测试输出字符串%s
printk("%s\n", "xxx");
//测试输出数字
printk("%d %ld %lld\n", 1, 2, 3);
//测试输出两个百分号
printk("%%\n");
//测试输出\t
printk("\nTesting tab...\n");
printk("date\t\tname\tscore\n");
printk("2022-01-01\tDavid\t99\n");
printk("2022-01-01\tJohn\t95\n");
//测试输出八进制
printk("\nTest base 8 : %d --> %#o\n", 255, 255);
//测试输出十六进制
printk("\nTest base 16 : %d --> %#x\n", 255, 255);
printk("\nTest base 16 : %d --> %#X\n", 255, 255);
}
// 测试内存管理单元
void test_mm()
{
kinfo("Testing memory management unit...");
//printk("bmp[0]:%#018x\tbmp[1]%#018lx\n", *memory_management_struct.bmp, *(memory_management_struct.bmp + 1));
kinfo("Try to allocate 64 memory pages.");
struct Page *page = alloc_pages(ZONE_NORMAL, 64, PAGE_PGT_MAPPED | PAGE_ACTIVE | PAGE_KERNEL);
/*
for (int i = 0; i <= 65; ++i)
{
printk("page%d\tattr:%#018lx\tphys_addr:%#018lx\t", i, page->attr, page->addr_phys);
++page;
if (((i + 1) % 2) == 0)
printk("\n");
}
*/
//printk("bmp[0]:%#018x\tbmp[1]%#018lx\n", *(memory_management_struct.bmp), *(memory_management_struct.bmp + 1));
}
void init()
{
// 初始化printk
init_printk(1440, 900, FR_address, 1440 * 900 * 4, 8, 16);
load_TR(8); // 加载TR寄存器
// 初始化任务状态段表
ul tss_item_addr = 0xffff800000007c00;
set_TSS64(tss_item_addr, tss_item_addr, tss_item_addr, tss_item_addr, tss_item_addr,
tss_item_addr, tss_item_addr, tss_item_addr, tss_item_addr, tss_item_addr);
// 初始化中断描述符表
init_sys_vector();
//asm volatile(" fxsave %0 " ::"m"(fxsave_region));
// 初始化内存管理单元
mm_init();
// 初始化中断模块
init_irq();
}
//操作系统内核从这里开始执行
void Start_Kernel(void)
{
init();
//show_welcome();
test_mm();
//test_printk();
//int t = 1 / 0; // 测试异常处理模块能否正常工作 触发除法错误
// int t = *(int *)0xffff80000aa00000; // 触发页故障
while (1)
;
}
void ignore_int()
{
printk("[");
printk_color(YELLOW, BLACK, "WARN");
printk("] Unknown interrupt or fault at RIP.\n");
return;
}