xvip_read
reg = xvip_read(xvip, addr);
reg = xvip_read(xvip, addr);
xvip_write(xvip, addr, xvip_read(xvip, addr) & ~clr);
xvip_write(xvip, addr, xvip_read(xvip, addr) | set);
xvip->saved_ctrl = xvip_read(xvip, XVIP_CTRL_CONTROL);
reg = xvip_read(xvip, XVIP_ACTIVE_SIZE);
version = xvip_read(xvip, XVIP_CTRL_VERSION);