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31 lines
1.4 KiB
C
31 lines
1.4 KiB
C
#include "smp.h"
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#include "../common/kprint.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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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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for (int i = 0; i < total_processor_num; ++i)
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{
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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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}
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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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// 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, 0xc4500); // init IPI
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wrmsr(0x830, 0xc4620); // start-up IPI
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wrmsr(0x830, 0xc4620); // start-up IPI
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} |