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48 lines
1.8 KiB
C
48 lines
1.8 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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}
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int ipi_regiserIPI(uint64_t irq_num, void *arg,
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void (*handler)(uint64_t irq_num, uint64_t param, struct pt_regs *regs),
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uint64_t param, hardware_intr_controller *controller, char *irq_name)
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{
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irq_desc_t *p = &SMP_IPI_desc[irq_num-200];
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p->controller = NULL; // 由于ipi不涉及到具体的硬件操作，因此不需要controller
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p->irq_name = irq_name;
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p->parameter = param;
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p->flags = 0;
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p->handler = handler;
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return 0;
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} |