解决NetBSD-1.0在VMware 11.0上重启时报指令错误的问题

#define     KBC_PULSE0    0xfe    /* pulse output bit 0 */
#define     KBC_PULSE1    0xfd    /* pulse output bit 1 */
#define     KBC_PULSE2    0xfb    /* pulse output bit 2 */
#define     KBC_PULSE3    0xf7    /* pulse output bit 3 */

extern    struct gate_descriptor idt[];

cpu_reset()
{
    struct region_descriptor region;

    disable_intr();

    /*
     * The keyboard controller has 4 random output pins, one of which is
     * connected to the RESET pin on the CPU in many PCs.  We tell the
     * keyboard controller to pulse this line a couple of times.
     */
    outb(KBCMDP, KBC_PULSE0);
    delay(100000);
    outb(KBCMDP, KBC_PULSE0);
    delay(100000);

    /*
     * Try to cause a triple fault and watchdog reset by making the IDT
     * invalid and causing a fault.
     */
    bzero((caddr_t)idt, NIDT * sizeof(idt[0]));
    /* setregion(&region, idt, NIDT * sizeof(idt[0]) - 1); */
    
    region.rd_limit = (int)( NIDT * sizeof(idt[0]) - 1 );
    region.rd_base  = (int)idt;
    
    lidt(&region);
    __asm __volatile("divl %0,%1" : : "q" (0), "a" (0)); 

#if 0
    /*
     * Try to cause a triple fault and watchdog reset by unmapping the
     * entire address space and doing a TLB flush.
     */
    bzero((caddr_t)PTD, NBPG);
    pmap_update(); 
#endif

    for (;;);
}

#include <machine/pio.h>
#include <i386/isa/ic/i8042.h>