[CRYPTO] api: Remove deprecated interface
[pv_ops_mirror.git] / arch / i386 / kernel / acpi / earlyquirk.c
blob4b60af7f91dd0c915c42f24d09976254b7c42353
1 /*
2 * Do early PCI probing for bug detection when the main PCI subsystem is
3 * not up yet.
4 */
5 #include <linux/init.h>
6 #include <linux/kernel.h>
7 #include <linux/pci.h>
8 #include <linux/acpi.h>
10 #include <asm/pci-direct.h>
11 #include <asm/acpi.h>
12 #include <asm/apic.h>
13 #include <asm/irq.h>
15 #ifdef CONFIG_ACPI
17 static int nvidia_hpet_detected __initdata;
19 static int __init nvidia_hpet_check(unsigned long phys, unsigned long size)
21 nvidia_hpet_detected = 1;
22 return 0;
24 #endif
26 static int __init check_bridge(int vendor, int device)
28 #ifdef CONFIG_ACPI
29 /* According to Nvidia all timer overrides are bogus unless HPET
30 is enabled. */
31 if (!acpi_use_timer_override && vendor == PCI_VENDOR_ID_NVIDIA) {
32 nvidia_hpet_detected = 0;
33 acpi_table_parse(ACPI_HPET, nvidia_hpet_check);
34 if (nvidia_hpet_detected == 0) {
35 acpi_skip_timer_override = 1;
36 printk(KERN_INFO "Nvidia board "
37 "detected. Ignoring ACPI "
38 "timer override.\n");
39 printk(KERN_INFO "If you got timer trouble "
40 "try acpi_use_timer_override\n");
44 #endif
45 if (vendor == PCI_VENDOR_ID_ATI && timer_over_8254 == 1) {
46 timer_over_8254 = 0;
47 printk(KERN_INFO "ATI board detected. Disabling timer routing "
48 "over 8254.\n");
50 return 0;
53 static void check_intel(void)
55 u16 vendor, device;
57 vendor = read_pci_config_16(0, 0, 0, PCI_VENDOR_ID);
59 if (vendor != PCI_VENDOR_ID_INTEL)
60 return;
62 device = read_pci_config_16(0, 0, 0, PCI_DEVICE_ID);
63 #ifdef CONFIG_SMP
64 if (device == PCI_DEVICE_ID_INTEL_E7320_MCH ||
65 device == PCI_DEVICE_ID_INTEL_E7520_MCH ||
66 device == PCI_DEVICE_ID_INTEL_E7525_MCH)
67 quirk_intel_irqbalance();
68 #endif
71 void __init check_acpi_pci(void)
73 int num, slot, func;
75 /* Assume the machine supports type 1. If not it will
76 always read ffffffff and should not have any side effect.
77 Actually a few buggy systems can machine check. Allow the user
78 to disable it by command line option at least -AK */
79 if (!early_pci_allowed())
80 return;
82 check_intel();
84 /* Poor man's PCI discovery */
85 for (num = 0; num < 32; num++) {
86 for (slot = 0; slot < 32; slot++) {
87 for (func = 0; func < 8; func++) {
88 u32 class;
89 u32 vendor;
90 class = read_pci_config(num, slot, func,
91 PCI_CLASS_REVISION);
92 if (class == 0xffffffff)
93 break;
95 if ((class >> 16) != PCI_CLASS_BRIDGE_PCI)
96 continue;
98 vendor = read_pci_config(num, slot, func,
99 PCI_VENDOR_ID);
101 if (check_bridge(vendor & 0xffff, vendor >> 16))
102 return;