> --- Ursprüngliche Nachricht --- > Von: Benjamin Herrenschmidt <[EMAIL PROTECTED]> > An: Gerhard Pircher <[EMAIL PROTECTED]> > Kopie: [EMAIL PROTECTED], debian-powerpc@lists.debian.org > Betreff: Re: AGPGART driver for ArticiaS - ioremap() problem > Datum: Mon, 16 Jan 2006 10:25:31 +1100 > > >Actually at least the bridge does everthing right until now (IMHO :-). > >The bridge is detected and also the aperture size is read out correctly > >from the registers. After that, the agp_backend_initialize() function in > >drivers/cahr/agp/backend.c calls the create_gatt_table() function of the > >driver (articias_create_gatt_table). Based on the detected aperture size > >and its definitions, this function allocates pages for the GATT table > >(alloc_gatt_pages). The function then tries to map this pages with > >ioremap_nocache(virt_to_gatt(table, (PAGE_SIZE * (1 << page_order))). > >But ioremap_nocache() cannot remap the pages, because the following code > >snipped in __ioremap (arch/ppc/mm/pgtable.c) is trigged: > > Yes, you are not allowed to ioremap RAM on ppc at least not with > CONFIG_6xx. You should leave it cacheable and use explicit cache flush > like the UniNorth driver.
Ah, okay. So at least the approach to use the Uninorth code was a step in the right direction. But that requires changes in the DRI and X server code, right? Thanks! regards, Gerhard -- 10 GB Mailbox, 100 FreeSMS/Monat http://www.gmx.net/de/go/topmail +++ GMX - die erste Adresse für Mail, Message, More +++ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
