コード例 #1
0
ファイル: direct.c プロジェクト: 12rafael/jellytimekernel
/*
 * Before we decide to use direct hardware access mechanisms, we try to do some
 * trivial checks to ensure it at least _seems_ to be working -- we just test
 * whether bus 00 contains a host bridge (this is similar to checking
 * techniques used in XFree86, but ours should be more reliable since we
 * attempt to make use of direct access hints provided by the PCI BIOS).
 *
 * This should be close to trivial, but it isn't, because there are buggy
 * chipsets (yes, you guessed it, by Intel and Compaq) that have no class ID.
 */
static int __init pci_sanity_check(struct pci_raw_ops *o)
{
	u32 x = 0;
	int year, devfn;

	if (pci_probe & PCI_NO_CHECKS)
		return 1;
	/* Assume Type 1 works for newer systems.
	   This handles machines that don't have anything on PCI Bus 0. */
	dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL);
	if (year >= 2001)
		return 1;

	for (devfn = 0; devfn < 0x100; devfn++) {
		if (o->read(0, 0, devfn, PCI_CLASS_DEVICE, 2, &x))
			continue;
		if (x == PCI_CLASS_BRIDGE_HOST || x == PCI_CLASS_DISPLAY_VGA)
			return 1;

		if (o->read(0, 0, devfn, PCI_VENDOR_ID, 2, &x))
			continue;
		if (x == PCI_VENDOR_ID_INTEL || x == PCI_VENDOR_ID_COMPAQ)
			return 1;
	}

	DBG(KERN_WARNING "PCI: Sanity check failed\n");
	return 0;
}
コード例 #2
0
ファイル: acpi.c プロジェクト: AdaLovelance/lxcGrsecKernels
void __init pci_acpi_crs_quirks(void)
{
	int year;

	if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
		pci_use_crs = false;

	dmi_check_system(pci_crs_quirks);

	/*
	 * If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
	 * takes precedence over anything we figured out above.
	 */
	if (pci_probe & PCI_ROOT_NO_CRS)
		pci_use_crs = false;
	else if (pci_probe & PCI_USE__CRS)
		pci_use_crs = true;

	printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
	       "if necessary, use \"pci=%s\" and report a bug\n",
	       pci_use_crs ? "Using" : "Ignoring",
	       pci_use_crs ? "nocrs" : "use_crs");
}
コード例 #3
0
ファイル: acpi_mmcfg.c プロジェクト: CPFL/xen
static int __init acpi_mcfg_check_entry(struct acpi_table_mcfg *mcfg,
                                        struct acpi_mcfg_allocation *cfg)
{
    int year;

    if (cfg->address < 0xFFFFFFFF)
        return 0;

    if (!strcmp(mcfg->header.oem_id, "SGI") ||
        !strcmp(mcfg->header.oem_id, "SGI2"))
        return 0;

    if (mcfg->header.revision >= 1 &&
        dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) &&
        year >= 2010)
            return 0;

    printk(KERN_ERR "MCFG region for %04x:%02x-%02x at %#"PRIx64
                    " (above 4GB) ignored\n",
           cfg->pci_segment, cfg->start_bus_number, cfg->end_bus_number,
           cfg->address);
    return -EINVAL;
}