On Sunday, January 07, 2007 11:42 am, Jesse Barnes wrote:
> This patch updates Oliver's MMConfig bridge detection patches with
> support for 915G bridges. It seems to work ok on my 915GM laptop.
>
> I also tried adding 965 support, but it doesn't work (at least not on my
> G965 box). When I enable MMConfig support when the register value is
> 0xf00000003 (should be a 256M enabled window at 0xf0000000) the box
> hangs at boot, so I'm not sure what I'm doing wrong...
For reference, here's the probe routine I tried for 965, probably something
dumb wrong with it that I'm not seeing atm.
static __init const char *pci_mmcfg_intel_965(void)
{
u64 pciexbar, mask = 0, len = 0;
u32 lo, hi;
pci_mmcfg_config_num = 1;
pci_conf1_read(0, 0, PCI_DEVFN(0,0), 0x60, 4, &lo);
pci_conf1_read(0, 0, PCI_DEVFN(0,0), 0x64, 4, &hi);
pciexbar = ((u64)hi << 32) | lo;
/* Enable bit */
if (!(pciexbar & 1))
pci_mmcfg_config_num = 0;
/* Size bits */
switch ((pciexbar >> 1) & 3) {
case 0:
mask = 0xff0000000UL;
len = 0x10000000U;
break;
case 1:
mask = 0xff8000000UL;
len = 0x08000000U;
break;
case 2:
mask = 0xffc000000UL;
len = 0x04000000U;
break;
default:
pci_mmcfg_config_num = 0;
}
if (pci_mmcfg_config_num) {
pci_mmcfg_config = kzalloc(sizeof(pci_mmcfg_config[0]),
GFP_KERNEL);
pci_mmcfg_config[0].base_address = pciexbar & mask;
pci_mmcfg_config[0].pci_segment_group_number = 0;
pci_mmcfg_config[0].start_bus_number = 0;
pci_mmcfg_config[0].end_bus_number = (len >> 20) - 1;
}
return "Intel Corporation G965 Express Memory Controller Hub";
}
Thanks,
Jesse
P.S. Hooray for Intel for publishing their bridge specs! Makes stuff like
this a bit easier.
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