R600_BIOS_ROM_DIS
write32(info.registers + R600_BUS_CNTL, (bus_cntl & ~R600_BIOS_ROM_DIS));
write32(info.registers + R600_BUS_CNTL, (bus_cntl & ~R600_BIOS_ROM_DIS));
write32(info.registers + R600_BUS_CNTL, (bus_cntl & ~R600_BIOS_ROM_DIS));