BCM_PAGE_BITS
val |= (BCM_PAGE_BITS - 8) << 16;
val = (BCM_PAGE_BITS - 8) << 24;
val |= (BCM_PAGE_BITS - 8) << 24 | 0x40;
val = (BCM_PAGE_BITS - 8) << 24;
#define TX_PAGE(x) (((x) & ~USABLE_TX_BD_PER_PAGE) >> (BCM_PAGE_BITS - 4))
#define RX_PAGE(x) (((x) & ~USABLE_RX_BD_PER_PAGE) >> (BCM_PAGE_BITS - 4))