static void
bwtwo_set_video_sun4(struct bwtwo_softc *sc, int enable)
{
if (sc->sc_fb.fb_flags & FB_PFOUR) {
/*
* This handles the overlay plane case, too.
*/
fb_pfour_set_video(&sc->sc_fb, enable);
return;
}
if (enable)
stba(AC_SYSENABLE, ASI_CONTROL,
lduba(AC_SYSENABLE, ASI_CONTROL) | SYSEN_VIDEO);
else
stba(AC_SYSENABLE, ASI_CONTROL,
lduba(AC_SYSENABLE, ASI_CONTROL) & ~SYSEN_VIDEO);
return;
}
static int
bwtwo_get_video_sun4(struct bwtwo_softc *sc)
{
if (sc->sc_fb.fb_flags & FB_PFOUR) {
/*
* This handles the overlay plane case, too.
*/
return (fb_pfour_get_video(&sc->sc_fb));
} else
return ((lduba(AC_SYSENABLE, ASI_CONTROL) & SYSEN_VIDEO) != 0);
}
/*
* Enable the cache.
* We need to clear out the valid bits first.
*/
void
cache_enable()
{
register u_int i, lim, ls, ts;
ls = cacheinfo.c_linesize;
ts = cacheinfo.c_totalsize;
for (i = AC_CACHETAGS, lim = i + ts; i < lim; i += ls)
sta(i, ASI_CONTROL, 0);
stba(AC_SYSENABLE, ASI_CONTROL,
lduba(AC_SYSENABLE, ASI_CONTROL) | SYSEN_CACHE);
cacheinfo.c_enabled = 1;
printf("%d byte (%d/line) write-through %cw flush cache enabled\n",
ts, ls, cacheinfo.c_hwflush ? 'h' : 's');
}