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108 lines
4.6 KiB
C
108 lines
4.6 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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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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void smp_init()
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{
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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 *)0x20000, _apu_boot_start, (unsigned long)&_apu_boot_end - (unsigned long)&_apu_boot_start);
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// wrmsr(0x830, 0xc4500); // init IPI
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struct INT_CMD_REG icr_entry;
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icr_entry.dest_mode = DEST_PHYSICAL;
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icr_entry.deliver_status = IDLE;
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icr_entry.res_1 = 0;
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icr_entry.level = ICR_LEVEL_DE_ASSERT;
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icr_entry.trigger = EDGE_TRIGGER;
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icr_entry.res_2 = 0;
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icr_entry.res_3 = 0;
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for (int i = 1; i < 2; ++i) // i从1开始，不初始化bsp
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{
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current_starting_cpu = i;
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icr_entry.vector = 0x00;
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icr_entry.deliver_mode = ICR_INIT;
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icr_entry.dest_shorthand = ICR_ALL_EXCLUDE_Self;
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icr_entry.destination.x2apic_destination = current_starting_cpu;
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wrmsr(0x830, *(unsigned long *)&icr_entry); // INIT IPI
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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);
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kdebug("cpu_core_info[i].stack_start =%#018lx", (uint64_t)kmalloc(STACK_SIZE, 0));
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cpu_core_info[i].stack_start += STACK_SIZE;
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kdebug("cpu_core_info[i].stack_base =%#018lx", (uint64_t)kmalloc(STACK_SIZE, 0));
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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 *)(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("GDT Table %#018lx, \t %#018lx", GDT_Table[10 + i * 2], 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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icr_entry.vector = 0x20;
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icr_entry.deliver_mode = ICR_Start_up;
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icr_entry.dest_shorthand = ICR_No_Shorthand;
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icr_entry.destination.x2apic_destination = current_starting_cpu;
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// 先init ipi， 然后连续发送两次start-up IPI
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// x2APIC下，ICR寄存器地址为0x830
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// xAPIC下则为0xfee00300(31-0) 0xfee00310 (63-32)
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wrmsr(0x830, *(ul *)&icr_entry); // start-up IPI
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wrmsr(0x830, *(ul *)&icr_entry); // start-up IPI
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}
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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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kdebug("current=%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", &IDT_Table);
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sti();
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//int a = 1 / 0; // 在这儿会出现异常，cs fs gs ss寄存器会被改变
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kdebug("IDT_addr = %#018lx", &IDT_Table);
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hlt();
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hlt();
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} |