> > There are 2 different onboard grpahics "cards" on U5/U10 mainboard, PGX > > that is ATI Mach 64 with 2M SGRAM and PGX24 that has 4M SGRAM. I have > > the latter. And these do not seem to need this reservation. > > Any VGA capable device can silently decode the VGA region. > > It is unconditionally reserved on x86 and other platforms as well. > > > Maybe Sun does not support legacy VGA cards in PCI slots (only > > PCI-assigned areas)? > > It doesn't matter if the video card is "PCI assigned", if the chip is > put into VGA mode (which both MACH64 and PGX24 fully support) it will > start responding to accesses to the VGA region. OK, I did some tests. Removed Video ROM reservation and put different VGA cards into slots 2 and 3 (2 PC VGA cards in many combinations, 1 PC and 1 Sun, 2 different Sun F-code ROM cards: mach64 and radeon). What happens is that tg3 BARs change if there is a VGA on bus, like this: 1fc00400000-1fc0040000f : ffb dac 1fc00600000-1fc00600983 : ffb fbc 1ff00000000-1ffffffffff : /pci@1f,0 1ff00002000-1ff00002fff : aic7xxx 1ff000a0000-1ff000bffff : Video RAM area 1ff000f0000-1ff000fffff : System ROM 1ff01000000-1ff01ffffff : atyfb 1ff02040000-1ff0204ffff : tg3 1ffc0000000-1ffdfffffff : IOMMU 1ffe0000000-1ffe000701f : sunhme 1ffe1000000-1ffe1ffffff : atyfb 1fff1000000-1fff1001fff : eeprom 1fff1200000-1fff120000f : cs4231 1fff13062f8-1fff13062ff : su 1fff13083f8-1fff13083ff : su 1fff1400000-1fff140003f : sab 1fff1400040-1fff140007f : sab 1fff1702000-1fff170200f : cs4231_pdma 1fff1704000-1fff170400f : cs4231_cdma 1fff1724000-1fff1724003 : power 1fff1726000-1fff1726003 : auxio So OBP seems to know what it is doing. On U10. I can also test on E220R, E250, E450, E3500, V240, Blade 100. I suspect anything newer has not gotten worse in this sense... -- Meelis Roos (mroos@xxxxxxxx) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
