BMCR_SPEED1
if (bmcr & BMCR_SPEED1)
#define BMCR_SPEED1000 BMCR_SPEED1
#define BMCR_S1000 BMCR_SPEED1 /* 1000 Mb/s */
#define BMCR_SPEED(x) ((x) & (BMCR_SPEED0|BMCR_SPEED1))
BMCR_AUTOEN | BMCR_FDX | BMCR_SPEED1 | BMCR_RESET);
BMCR_AUTOEN | BMCR_FDX | BMCR_SPEED1 | BMCR_STARTNEG);