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测试IPI

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This commit is contained in:
fslongjin
2022-04-07 20:21:28 +08:00
parent ac2508224e
commit 279de4c7f9
14 changed files with 265 additions and 81 deletions
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37
kernel/arch/x86_64/x86_64_ipi.c Normal file
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#include "x86_64_ipi.h"
void ipi_send_IPI(uint32_t dest_mode, uint32_t deliver_status, uint32_t level, uint32_t trigger,
uint32_t vector, uint32_t deliver_mode, uint32_t dest_shorthand, bool apic_type, uint32_t destination)
{
struct INT_CMD_REG icr_entry;
icr_entry.dest_mode = dest_mode;
icr_entry.deliver_status = deliver_status;
icr_entry.res_1 = 0;
icr_entry.level = level;
icr_entry.trigger = trigger;
icr_entry.res_2 = 0;
icr_entry.res_3 = 0;
icr_entry.vector = vector;
icr_entry.deliver_mode = deliver_mode;
icr_entry.dest_shorthand = dest_shorthand;
// x2APIC下，ICR寄存器地址为0x830
// xAPIC下则为0xfee00300(31-0) 0xfee00310 (63-32)
if (apic_type) // x2APIC
{
icr_entry.destination.x2apic_destination = destination;
wrmsr(0x830, *(unsigned long *)&icr_entry); // 发送ipi
}
else // xAPIC
{
icr_entry.destination.apic_destination.dest_field = destination & 0xff;
icr_entry.destination.apic_destination.res_4 = 0;
// 先向高32bit写数据，然后再向低32bit写数据，不能调转
*(uint32_t*)(APIC_LOCAL_APIC_VIRT_BASE_ADDR+0x310) = (uint32_t)(((*(ul*)&icr_entry)>>32)&0xffff);
*(uint32_t*)(APIC_LOCAL_APIC_VIRT_BASE_ADDR+0x300) = (uint32_t)((*(ul*)&icr_entry)&0xffff);
}
}