NIC_SRAM_SEND_RCB
limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE * 16;
limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE * 4;
limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE * 2;
limit = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE;
for (txrcb = NIC_SRAM_SEND_RCB + TG3_BDINFO_SIZE;
u32 txrcb = NIC_SRAM_SEND_RCB;