GPMC_PREFETCH_CONFIG1
reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1;
gpmc_context->prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1);
gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context->prefetch_config1);