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37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
#include "x86_64_ipi.h"
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void ipi_send_IPI(uint32_t dest_mode, uint32_t deliver_status, uint32_t level, uint32_t trigger,
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uint32_t vector, uint32_t deliver_mode, uint32_t dest_shorthand, bool apic_type, uint32_t destination)
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{
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struct INT_CMD_REG icr_entry;
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icr_entry.dest_mode = dest_mode;
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icr_entry.deliver_status = deliver_status;
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icr_entry.res_1 = 0;
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icr_entry.level = level;
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icr_entry.trigger = trigger;
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icr_entry.res_2 = 0;
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icr_entry.res_3 = 0;
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icr_entry.vector = vector;
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icr_entry.deliver_mode = deliver_mode;
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icr_entry.dest_shorthand = dest_shorthand;
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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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if (apic_type) // x2APIC
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{
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icr_entry.destination.x2apic_destination = destination;
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wrmsr(0x830, *(unsigned long *)&icr_entry); // 发送ipi
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}
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else // xAPIC
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{
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icr_entry.destination.apic_destination.dest_field = destination & 0xff;
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icr_entry.destination.apic_destination.res_4 = 0;
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// 先向高32bit写数据，然后再向低32bit写数据，不能调转
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*(uint32_t*)(APIC_LOCAL_APIC_VIRT_BASE_ADDR+0x310) = (uint32_t)(((*(ul*)&icr_entry)>>32)&0xffff);
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*(uint32_t*)(APIC_LOCAL_APIC_VIRT_BASE_ADDR+0x300) = (uint32_t)((*(ul*)&icr_entry)&0xffff);
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}
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} |