mirror of
https://github.com/DragonOS-Community/DragonOS.git
synced 2025-06-12 14:16:47 +00:00
119 lines
5.1 KiB
C
119 lines
5.1 KiB
C
#include "smp.h"
|
||
#include "../common/kprint.h"
|
||
#include "../driver/interrupt/apic/apic.h"
|
||
#include "../exception/gate.h"
|
||
#include "../common/cpu.h"
|
||
#include "../mm/slab.h"
|
||
#include "../process/process.h"
|
||
#include "../process/spinlock.h"
|
||
|
||
#include "ipi.h"
|
||
|
||
static spinlock_t multi_core_starting_lock; // 多核启动锁
|
||
|
||
static struct acpi_Processor_Local_APIC_Structure_t *proc_local_apic_structs[MAX_SUPPORTED_PROCESSOR_NUM];
|
||
static uint32_t total_processor_num = 0;
|
||
int current_starting_cpu = 0;
|
||
|
||
int num_cpu_started = 1;
|
||
|
||
void smp_init()
|
||
{
|
||
spin_init(&multi_core_starting_lock); // 初始化多核启动锁
|
||
ul tmp_vaddr[MAX_SUPPORTED_PROCESSOR_NUM] = {0};
|
||
|
||
apic_get_ics(ACPI_ICS_TYPE_PROCESSOR_LOCAL_APIC, tmp_vaddr, &total_processor_num);
|
||
|
||
kdebug("processor num=%d", total_processor_num);
|
||
for (int i = 0; i < total_processor_num; ++i)
|
||
proc_local_apic_structs[i] = (struct acpi_Processor_Local_APIC_Structure_t *)(tmp_vaddr[i]);
|
||
|
||
//*(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)
|
||
// 将引导程序复制到物理地址0x20000处
|
||
memcpy((unsigned char *)phys_2_virt(0x20000), _apu_boot_start, (unsigned long)&_apu_boot_end - (unsigned long)&_apu_boot_start);
|
||
|
||
// 设置多核IPI中断门
|
||
for (int i = 200; i < 210; ++i)
|
||
set_intr_gate(i, 2, SMP_interrupt_table[i - 200]);
|
||
|
||
memset((void *)SMP_IPI_desc, 0, sizeof(irq_desc_t) * SMP_IRQ_NUM);
|
||
|
||
ipi_send_IPI(DEST_PHYSICAL, IDLE, ICR_LEVEL_DE_ASSERT, EDGE_TRIGGER, 0x00, ICR_INIT, ICR_ALL_EXCLUDE_Self, true, 0x00);
|
||
|
||
for (int i = 1; i < total_processor_num; ++i) // i从1开始，不初始化bsp
|
||
{
|
||
if (proc_local_apic_structs[i]->ACPI_Processor_UID == 0)
|
||
--total_processor_num;
|
||
spin_lock(&multi_core_starting_lock);
|
||
current_starting_cpu = i;
|
||
|
||
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);
|
||
// 为每个AP处理器分配栈空间、tss空间
|
||
cpu_core_info[i].stack_start = (uint64_t)kmalloc(STACK_SIZE, 0) + STACK_SIZE;
|
||
|
||
cpu_core_info[i].tss_vaddr = (uint64_t)kmalloc(128, 0);
|
||
|
||
set_tss_descriptor(10 + (i * 2), (void *)virt_2_phys(cpu_core_info[i].tss_vaddr));
|
||
|
||
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);
|
||
kdebug("phys_2_virt(GDT_Table)=%#018lx",phys_2_virt(GDT_Table));
|
||
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));
|
||
// kdebug("(cpu_core_info[i].tss_vaddr)=%#018lx", (cpu_core_info[i].tss_vaddr));
|
||
kdebug("(cpu_core_info[i].stack_start)=%#018lx", (cpu_core_info[i].stack_start));
|
||
// 连续发送两次start-up IPI
|
||
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);
|
||
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);
|
||
}
|
||
|
||
while (num_cpu_started != total_processor_num)
|
||
__asm__ __volatile__("pause" ::
|
||
: "memory");
|
||
|
||
kinfo("Cleaning page table remapping...\n");
|
||
|
||
// 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
|
||
//todo: 取消低0-2M的地址映射
|
||
for (int i = 0; i < 128; ++i)
|
||
{
|
||
|
||
*(ul *)(phys_2_virt(global_CR3) + i) = 0UL;
|
||
}
|
||
|
||
kinfo("Successfully cleaned page table remapping!\n");
|
||
|
||
}
|
||
|
||
/**
|
||
* @brief AP处理器启动后执行的第一个函数
|
||
*
|
||
*/
|
||
void smp_ap_start()
|
||
{
|
||
|
||
// 切换栈基地址
|
||
// uint64_t stack_start = (uint64_t)kmalloc(STACK_SIZE, 0) + STACK_SIZE;
|
||
__asm__ __volatile__("movq %0, %%rbp \n\t" ::"m"(cpu_core_info[current_starting_cpu].stack_start)
|
||
: "memory");
|
||
__asm__ __volatile__("movq %0, %%rsp \n\t" ::"m"(cpu_core_info[current_starting_cpu].stack_start)
|
||
: "memory");
|
||
/*
|
||
__asm__ __volatile__("movq %0, %%rbp \n\t" ::"m"(stack_start)
|
||
: "memory");
|
||
__asm__ __volatile__("movq %0, %%rsp \n\t" ::"m"(stack_start)
|
||
: "memory");*/
|
||
ksuccess("AP core successfully started!");
|
||
|
||
++num_cpu_started;
|
||
|
||
kdebug("current cpu = %d", current_starting_cpu);
|
||
|
||
apic_init_ap_core_local_apic();
|
||
load_TR(10 + current_starting_cpu * 2);
|
||
|
||
sti();
|
||
kdebug("IDT_addr = %#018lx", phys_2_virt(IDT_Table));
|
||
memset(current_pcb, 0, sizeof(struct process_control_block));
|
||
spin_unlock(&multi_core_starting_lock);
|
||
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
|
||
hlt();
|
||
} |