MSGBUF_VA
pmap_map(MSGBUF_VA, pa, pa + size, VM_PROT_READ|VM_PROT_WRITE);
initmsgbuf((void *)MSGBUF_VA, size);
*handled = (v >= MSGBUF_VA && v < MSGBUF_VA + PAGE_SIZE) ||
#define INTRREG_VA ( MSGBUF_VA + _MAXNBPG) /* [4/4c] */
#define MSIIEP_PCIC_VA ( MSGBUF_VA + _MAXNBPG) /* [IIep] */
#define PI_INTR_VA ( MSGBUF_VA + _MAXNBPG) /* [4m] */
#if INTSTACK - MSGBUF_VA - MSGBUFSIZE < 0
msgbufp = (struct kern_msgbuf *)(vaddr_t)MSGBUF_VA;