On Sat Sep 4 22:56:22 EDT 2010, [email protected] wrote:
> i came across this the other day - i thought i'd finally found a
> machine for which P9 supports nothing.
>
> in fact i beat you - no PCI devices at all.
>
> any help appreciated. it boots any flavour of windows. new HP Pav quadcore.
9atom has this change to 9load. this fixed up a funky
motherboard with ipmi.
pci.c:528,535 - /n/sources/plan9/sys/src/boot/pc/pci.c:514,520
* according to the spec.
*/
n = inl(PciADDR);
-
- if(!(n & 0x7f000003)){
+ if(!(n & 0x7FF00000)){
outl(PciADDR, 0x80000000);
outb(PciADDR+3, 0);
if(inl(PciADDR) & 0x80000000){
perhaps this will help. if not the value of n would
be interesting.
in the same vein, i've got several machines in the lab
that have pci busses >= 64. this change was all that
was required (and setting *pcimaxbno in the .ini
file for the kernel)
pci.c:37,43 - /n/sources/plan9/sys/src/boot/pc//pci.c:36,42
static Lock pcicfglock;
static Lock pcicfginitlock;
static int pcicfgmode = -1;
- static int pcimaxbno = 255;
+ static int pcimaxbno = 7;
static int pcimaxdno;
static Pcidev* pciroot;
static Pcidev* pcilist;
i'm tempted to set maxbno to 255 in the kernel as well, but
i don't think i understand why it was set to less than 255
in the first place. if this is just a speedup, i'd be tempted.
anyone with first-hand knowledge?
- erik
