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https://github.com/DragonOS-Community/DragonOS.git
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206 lines
4.6 KiB
C
206 lines
4.6 KiB
C
//
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// Created by longjin on 2022/1/20.
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//
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#include "common/glib.h"
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#include "common/kprint.h"
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#include "common/printk.h"
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#include "exception/gate.h"
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#include "exception/irq.h"
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#include "exception/trap.h"
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#include "mm/mm.h"
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#include "mm/slab.h"
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#include "process/process.h"
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#include "smp/smp.h"
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#include "syscall/syscall.h"
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#include <exception/softirq.h>
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#include <libs/lib_ui/screen_manager.h>
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#include <libs/lib_ui/textui.h>
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#include <sched/sched.h>
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#include <smp/ipi.h>
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#include <filesystem/vfs/VFS.h>
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#include "driver/acpi/acpi.h"
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#include "driver/disk/ata.h"
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#include "driver/keyboard/ps2_keyboard.h"
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#include "driver/mouse/ps2_mouse.h"
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#include "driver/multiboot2/multiboot2.h"
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#include <driver/timers/HPET/HPET.h>
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#include <time/timer.h>
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#include <driver/interrupt/apic/apic_timer.h>
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extern int rs_driver_init();
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extern void rs_softirq_init();
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extern void rs_mm_init();
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extern void rs_kthread_init();
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extern void rs_init_intertrait();
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extern void rs_init_before_mem_init();
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ul bsp_idt_size, bsp_gdt_size;
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#pragma GCC push_options
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#pragma GCC optimize("O0")
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struct gdtr gdtp;
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struct idtr idtp;
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ul _stack_start;
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void reload_gdt()
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{
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gdtp.size = bsp_gdt_size - 1;
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gdtp.gdt_vaddr = (ul)phys_2_virt((ul)&GDT_Table);
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asm volatile("lgdt (%0) \n\t" ::"r"(&gdtp)
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: "memory");
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}
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void reload_idt()
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{
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idtp.size = bsp_idt_size - 1;
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idtp.idt_vaddr = (ul)phys_2_virt((ul)&IDT_Table);
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// kdebug("gdtvaddr=%#018lx", p.gdt_vaddr);
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// kdebug("gdt size=%d", p.size);
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asm volatile("lidt (%0) \n\t" ::"r"(&idtp)
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: "memory");
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}
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// 初始化系统各模块
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void system_initialize()
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{
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rs_init_before_mem_init();
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// 重新加载gdt和idt
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ul tss_item_addr = (ul)phys_2_virt(0x7c00);
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_stack_start = head_stack_start; // 保存init proc的栈基地址(由于之后取消了地址重映射,因此必须在这里重新保存)
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kdebug("_stack_start=%#018lx", _stack_start);
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set_current_core_tss(_stack_start, 0);
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rs_load_current_core_tss();
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cpu_core_info[0].stack_start = _stack_start;
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// 初始化中断描述符表
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sys_vector_init();
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// 初始化内存管理单元
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// mm_init();
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rs_mm_init();
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// 内存管理单元初始化完毕后,需要立即重新初始化显示驱动。
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// 原因是,系统启动初期,framebuffer被映射到48M地址处,
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// mm初始化完毕后,若不重新初始化显示驱动,将会导致错误的数据写入内存,从而造成其他模块崩溃
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// 对显示模块进行低级初始化,不启用double buffer
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io_mfence();
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scm_reinit();
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rs_textui_init();
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rs_init_intertrait();
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// kinfo("vaddr:%#018lx", video_frame_buffer_info.vaddr);
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io_mfence();
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vfs_init();
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rs_driver_init();
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acpi_init();
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io_mfence();
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irq_init();
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rs_process_init();
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sched_init();
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sti();
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io_mfence();
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rs_softirq_init();
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syscall_init();
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io_mfence();
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rs_timekeeping_init();
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io_mfence();
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rs_timer_init();
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io_mfence();
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rs_jiffies_init();
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io_mfence();
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rs_kthread_init();
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io_mfence();
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io_mfence();
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rs_clocksource_boot_finish();
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io_mfence();
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cpu_init();
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ps2_keyboard_init();
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io_mfence();
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rs_pci_init();
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// 这里必须加内存屏障,否则会出错
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io_mfence();
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smp_init();
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io_mfence();
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HPET_init();
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io_mfence();
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HPET_measure_freq();
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io_mfence();
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cli();
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HPET_enable();
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io_mfence();
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// 系统初始化到此结束,剩下的初始化功能应当放在初始内核线程中执行
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apic_timer_init();
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io_mfence();
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sti();
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while (1)
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;
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}
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// 操作系统内核从这里开始执行
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void Start_Kernel(void)
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{
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// 获取multiboot2的信息
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uint64_t mb2_info, mb2_magic;
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__asm__ __volatile__("movq %%r15, %0 \n\t"
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"movq %%r14, %1 \n\t"
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"movq %%r13, %2 \n\t"
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"movq %%r12, %3 \n\t"
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: "=r"(mb2_info), "=r"(mb2_magic), "=r"(bsp_gdt_size), "=r"(bsp_idt_size)::"memory");
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reload_gdt();
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reload_idt();
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mb2_info &= 0xffffffff;
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mb2_magic &= 0xffffffff;
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multiboot2_init(mb2_info, mb2_magic);
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io_mfence();
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system_initialize();
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io_mfence();
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// idle
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while (1)
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{
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// 如果调用的时候,启用了中断,则hlt。否则认为是bug
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if (get_rflags() & 0x200)
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{
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// kdebug("hlt");
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hlt();
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}
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else
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{
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BUG_ON(1);
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pause();
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}
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}
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}
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#pragma GCC pop_options |