HelenOS sources
pio_write_le32 195 uspace/drv/block/virtio-blk/virtio-blk.c pio_write_le32(&req_header->type,
pio_write_le32 102 uspace/lib/virtio/virtio.c pio_write_le32(&d->len, len);
pio_write_le32 320 uspace/lib/virtio/virtio.c pio_write_le32(&cfg->device_feature_select, VIRTIO_FEATURES_0_31);
pio_write_le32 324 uspace/lib/virtio/virtio.c pio_write_le32(&cfg->device_feature_select, VIRTIO_FEATURES_32_63);
pio_write_le32 339 uspace/lib/virtio/virtio.c pio_write_le32(&cfg->driver_feature_select, VIRTIO_FEATURES_0_31);
pio_write_le32 340 uspace/lib/virtio/virtio.c pio_write_le32(&cfg->driver_feature, features);
pio_write_le32 341 uspace/lib/virtio/virtio.c pio_write_le32(&cfg->driver_feature_select, VIRTIO_FEATURES_32_63);
pio_write_le32 342 uspace/lib/virtio/virtio.c pio_write_le32(&cfg->driver_feature, reserved_features);
HelenOS homepage, sources at GitHub