BCM_PAGE_BITS
val |= (BCM_PAGE_BITS - 8) << 16;
val = (BCM_PAGE_BITS - 8) << 24;
val |= (BCM_PAGE_BITS - 8) << 24 | 0x40;
#define BCM_PAGE_SIZE (1 << BCM_PAGE_BITS)
#define BCE_TX_BD_PAGE_SHIFT (BCM_PAGE_BITS - BCE_TX_BD_SHIFT)
#define BCE_RX_BD_PAGE_SHIFT (BCM_PAGE_BITS - BCE_RX_BD_SHIFT)