ref: f35d5ee5b036b7b4fa59b1839f52fca15b7f99f9
dir: /sys/src/9/ppc/io.h/
enum {
BusCBUS = 0, /* Corollary CBUS */
BusCBUSII, /* Corollary CBUS II */
BusEISA, /* Extended ISA */
BusFUTURE, /* IEEE Futurebus */
BusINTERN, /* Internal bus */
BusISA, /* Industry Standard Architecture */
BusMBI, /* Multibus I */
BusMBII, /* Multibus II */
BusMCA, /* Micro Channel Architecture */
BusMPI, /* MPI */
BusMPSA, /* MPSA */
BusNUBUS, /* Apple Macintosh NuBus */
BusPCI, /* Peripheral Component Interconnect */
BusPCMCIA, /* PC Memory Card International Association */
BusTC, /* DEC TurboChannel */
BusVL, /* VESA Local bus */
BusVME, /* VMEbus */
BusXPRESS, /* Express System Bus */
BusPPC /* Power PC internal bus */
};
#define MKBUS(t,b,d,f) (((t)<<24)|(((b)&0xFF)<<16)|(((d)&0x1F)<<11)|(((f)&0x07)<<8))
#define BUSFNO(tbdf) (((tbdf)>>8)&0x07)
#define BUSDNO(tbdf) (((tbdf)>>11)&0x1F)
#define BUSBNO(tbdf) (((tbdf)>>16)&0xFF)
#define BUSTYPE(tbdf) ((tbdf)>>24)
#define BUSBDF(tbdf) ((tbdf)&0x00FFFF00)
#define BUSUNKNOWN (-1)