If you're going to send email to my exchange account, you'll get top posting. Send email to one of my real accounts if you want proper email etiquette. > -----Original Message----- > From: Jesse Barnes [mailto:jbarnes@xxxxxxxxxxxxxxxx] > Sent: Wednesday, May 06, 2009 11:01 AM > To: Wilcox, Matthew R > Cc: Yinghai Lu; Stephen Rothwell; linux-next@xxxxxxxxxxxxxxx; Benjamin > Herrenschmidt > Subject: Re: linux-next: IO BAR sizing warning > > On Wed, 6 May 2009 11:41:12 -0600 > "Wilcox, Matthew R" <matthew.r.wilcox@xxxxxxxxx> wrote: > > > I think PowerPC's IO_SPACE_LIMIT is defined incorrectly. > > > > On 64-bit, it's currently set to 0xffff'ffff'ffff'ffff. This can't > > possibly work, there's no way for the PCI bus to transmit 64-bit > > IO-port addresses. It should probably be defined to > > > > 0xffffffffU > > TOP POSTER! > > But yeah on a bus level it clearly needs to be limited to 32 bits, but > ISTR that some arches use the high resource bits for tracking I/O > resources on a systemwide basis (too lazy to look atm). > > So either we need to split the definition between bus & resource usage, > or add a cast here... > -- > Jesse Barnes, Intel Open Source Technology Center ��.n��������+%������w��{.n�����{��w����ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
