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https://github.com/DragonOS-Community/DragonOS.git
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119 lines
5.1 KiB
C
119 lines
5.1 KiB
C
#include "smp.h"
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#include "../common/kprint.h"
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#include "../driver/interrupt/apic/apic.h"
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#include "../exception/gate.h"
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#include "../common/cpu.h"
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#include "../mm/slab.h"
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#include "../process/process.h"
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#include "../process/spinlock.h"
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#include "ipi.h"
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static spinlock_t multi_core_starting_lock; // 多核启动锁
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static struct acpi_Processor_Local_APIC_Structure_t *proc_local_apic_structs[MAX_SUPPORTED_PROCESSOR_NUM];
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static uint32_t total_processor_num = 0;
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int current_starting_cpu = 0;
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int num_cpu_started = 1;
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void smp_init()
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{
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spin_init(&multi_core_starting_lock); // 初始化多核启动锁
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ul tmp_vaddr[MAX_SUPPORTED_PROCESSOR_NUM] = {0};
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apic_get_ics(ACPI_ICS_TYPE_PROCESSOR_LOCAL_APIC, tmp_vaddr, &total_processor_num);
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kdebug("processor num=%d", total_processor_num);
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for (int i = 0; i < total_processor_num; ++i)
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proc_local_apic_structs[i] = (struct acpi_Processor_Local_APIC_Structure_t *)(tmp_vaddr[i]);
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//*(uchar *)0x20000 = 0xf4; // 在内存的0x20000处写入HLT指令(AP处理器会执行物理地址0x20000的代码)
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// 将引导程序复制到物理地址0x20000处
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memcpy((unsigned char *)phys_2_virt(0x20000), _apu_boot_start, (unsigned long)&_apu_boot_end - (unsigned long)&_apu_boot_start);
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// 设置多核IPI中断门
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for (int i = 200; i < 210; ++i)
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set_intr_gate(i, 2, SMP_interrupt_table[i - 200]);
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memset((void *)SMP_IPI_desc, 0, sizeof(irq_desc_t) * SMP_IRQ_NUM);
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ipi_send_IPI(DEST_PHYSICAL, IDLE, ICR_LEVEL_DE_ASSERT, EDGE_TRIGGER, 0x00, ICR_INIT, ICR_ALL_EXCLUDE_Self, true, 0x00);
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for (int i = 1; i < total_processor_num; ++i) // i从1开始，不初始化bsp
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{
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if (proc_local_apic_structs[i]->ACPI_Processor_UID == 0)
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--total_processor_num;
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spin_lock(&multi_core_starting_lock);
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current_starting_cpu = i;
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kdebug("[core %d] acpi processor UID=%d, APIC ID=%d, flags=%#010lx", i, proc_local_apic_structs[i]->ACPI_Processor_UID, proc_local_apic_structs[i]->ACPI_ID, proc_local_apic_structs[i]->flags);
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// 为每个AP处理器分配栈空间、tss空间
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cpu_core_info[i].stack_start = (uint64_t)kmalloc(STACK_SIZE, 0) + STACK_SIZE;
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cpu_core_info[i].tss_vaddr = (uint64_t)kmalloc(128, 0);
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set_tss_descriptor(10 + (i * 2), (void *)virt_2_phys(cpu_core_info[i].tss_vaddr));
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set_tss64((uint *)cpu_core_info[i].tss_vaddr, cpu_core_info[i].stack_start, cpu_core_info[i].stack_start, cpu_core_info[i].stack_start, cpu_core_info[i].stack_start, cpu_core_info[i].stack_start, cpu_core_info[i].stack_start, cpu_core_info[i].stack_start, cpu_core_info[i].stack_start, cpu_core_info[i].stack_start, cpu_core_info[i].stack_start);
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kdebug("phys_2_virt(GDT_Table)=%#018lx",phys_2_virt(GDT_Table));
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kdebug("GDT Table %#018lx, \t %#018lx", *(ul *)(phys_2_virt(GDT_Table) + 10 + i * 2), *(ul *)(phys_2_virt(GDT_Table) + 10 + i * 2 + 1));
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// kdebug("(cpu_core_info[i].tss_vaddr)=%#018lx", (cpu_core_info[i].tss_vaddr));
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kdebug("(cpu_core_info[i].stack_start)=%#018lx", (cpu_core_info[i].stack_start));
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// 连续发送两次start-up IPI
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ipi_send_IPI(DEST_PHYSICAL, IDLE, ICR_LEVEL_DE_ASSERT, EDGE_TRIGGER, 0x20, ICR_Start_up, ICR_No_Shorthand, true, proc_local_apic_structs[i]->ACPI_ID);
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ipi_send_IPI(DEST_PHYSICAL, IDLE, ICR_LEVEL_DE_ASSERT, EDGE_TRIGGER, 0x20, ICR_Start_up, ICR_No_Shorthand, true, proc_local_apic_structs[i]->ACPI_ID);
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}
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while (num_cpu_started != total_processor_num)
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__asm__ __volatile__("pause" ::
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: "memory");
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kinfo("Cleaning page table remapping...\n");
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// 由于ap处理器初始化过程需要用到0x00处的地址，因此初始化完毕后才取消内存地址的重映射
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//todo: 取消低0-2M的地址映射
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for (int i = 0; i < 128; ++i)
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{
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*(ul *)(phys_2_virt(global_CR3) + i) = 0UL;
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}
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kinfo("Successfully cleaned page table remapping!\n");
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}
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/**
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* @brief AP处理器启动后执行的第一个函数
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*
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*/
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void smp_ap_start()
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{
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// 切换栈基地址
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// uint64_t stack_start = (uint64_t)kmalloc(STACK_SIZE, 0) + STACK_SIZE;
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__asm__ __volatile__("movq %0, %%rbp \n\t" ::"m"(cpu_core_info[current_starting_cpu].stack_start)
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: "memory");
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__asm__ __volatile__("movq %0, %%rsp \n\t" ::"m"(cpu_core_info[current_starting_cpu].stack_start)
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: "memory");
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/*
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__asm__ __volatile__("movq %0, %%rbp \n\t" ::"m"(stack_start)
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: "memory");
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__asm__ __volatile__("movq %0, %%rsp \n\t" ::"m"(stack_start)
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: "memory");*/
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ksuccess("AP core successfully started!");
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++num_cpu_started;
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kdebug("current cpu = %d", current_starting_cpu);
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apic_init_ap_core_local_apic();
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load_TR(10 + current_starting_cpu * 2);
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sti();
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kdebug("IDT_addr = %#018lx", phys_2_virt(IDT_Table));
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memset(current_pcb, 0, sizeof(struct process_control_block));
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spin_unlock(&multi_core_starting_lock);
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while (1) // 这里要循环hlt，原因是当收到中断后，核心会被唤醒，处理完中断之后不会自动hlt
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hlt();
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} |