50 	u_int32_t	initial_aperture; /* aperture size at startup */
144 		 * aperture so that the gatt size reduces.  in agp_sis_attach()
156 	/* Enable the aperture. */  in agp_sis_attach()
176 	/* Disable the aperture.. */  in agp_sis_detach()
183 	/* Put the aperture back the way it started. */  in agp_sis_detach()
197 	 * The aperture size is equal to 4M<<gws.  in agp_sis_get_aperture()
204 agp_sis_set_aperture(device_t dev, u_int32_t aperture)  in agp_sis_set_aperture()  argument
212 	if (aperture & (aperture - 1)  in agp_sis_set_aperture()
213 	    || aperture < 4*1024*1024  in agp_sis_set_aperture()
214 	    || aperture > 256*1024*1024)  in agp_sis_set_aperture()
217 	gws = ffs(aperture / 4*1024*1024) - 1;  in agp_sis_set_aperture()