On Tue, Feb 10, 2009 at 9:05 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote: > try to make thing simple. > for system: with AMD Fam10h, and MCP55 + 2 IO55 > amd fam10h cpu: said it needs [0,0] > mcp55: said it need [0,255] > io55 #1: said it need [0x40, 0x40+255], then u8 end_bus_number = 0x3f > io55 #2: said it need [0x80, 0x80+255], then u8 end_bus_number = 0x7f > MMIO route in NBs is right. Oh, I misinterpreted your earlier comment--I thought you were referring to 0x40, 0x80, 0xc0 as devfns, not bus numbers. The MCP55 is on device 0 on our board as well. > but MCFG is right... so just use that. > > when acpi=off, if check_and_enable_amd_mconf, it will forcely to make > amd fam10h cpu: said it needs [0,255] and pci_mmcfg_config_num = 1 > so mcp55 mconf is not used. OK, I'm just pointing out that the existing mmconfig hostbridge detection code overrides ACPI MCFG. Past commit comments suggest that the hostbridge registers are more trustworthy than ACPI on some boards. --Ed -- 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
