fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / i386 / kernel / acpi / earlyquirk.c

diff --git a/arch/i386/kernel/acpi/earlyquirk.c b/arch/i386/kernel/acpi/earlyquirk.c
index 2e3b643..4b60af7 100644 (file)
--- a/arch/i386/kernel/acpi/earlyquirk.c
+++ b/arch/i386/kernel/acpi/earlyquirk.c
@@ -5,17 +5,41 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
+#include <linux/acpi.h>
+
 #include <asm/pci-direct.h>
 #include <asm/acpi.h>
 #include <asm/apic.h>
+#include <asm/irq.h>
+
+#ifdef CONFIG_ACPI
+
+static int nvidia_hpet_detected __initdata;
+
+static int __init nvidia_hpet_check(unsigned long phys, unsigned long size)
+{
+       nvidia_hpet_detected = 1;
+       return 0;
+}
+#endif
 
 static int __init check_bridge(int vendor, int device)
 {
 #ifdef CONFIG_ACPI
-       /* According to Nvidia all timer overrides are bogus. Just ignore
-          them all. */
-       if (vendor == PCI_VENDOR_ID_NVIDIA) {
-               acpi_skip_timer_override = 1;
+       /* According to Nvidia all timer overrides are bogus unless HPET
+          is enabled. */
+       if (!acpi_use_timer_override && vendor == PCI_VENDOR_ID_NVIDIA) {
+               nvidia_hpet_detected = 0;
+               acpi_table_parse(ACPI_HPET, nvidia_hpet_check);
+               if (nvidia_hpet_detected == 0) {
+                       acpi_skip_timer_override = 1;
+                         printk(KERN_INFO "Nvidia board "
+                       "detected. Ignoring ACPI "
+                       "timer override.\n");
+                printk(KERN_INFO "If you got timer trouble "
+                                "try acpi_use_timer_override\n");
+
+               }
        }
 #endif
        if (vendor == PCI_VENDOR_ID_ATI && timer_over_8254 == 1) {
@@ -26,12 +50,36 @@ static int __init check_bridge(int vendor, int device)
        return 0;
 }
 
+static void check_intel(void)
+{
+       u16 vendor, device;
+
+       vendor = read_pci_config_16(0, 0, 0, PCI_VENDOR_ID);
+
+       if (vendor != PCI_VENDOR_ID_INTEL)
+               return;
+
+       device = read_pci_config_16(0, 0, 0, PCI_DEVICE_ID);
+#ifdef CONFIG_SMP
+       if (device == PCI_DEVICE_ID_INTEL_E7320_MCH ||
+           device == PCI_DEVICE_ID_INTEL_E7520_MCH ||
+           device == PCI_DEVICE_ID_INTEL_E7525_MCH)
+               quirk_intel_irqbalance();
+#endif
+}
+
 void __init check_acpi_pci(void)
 {
        int num, slot, func;
 
        /* Assume the machine supports type 1. If not it will 
-          always read ffffffff and should not have any side effect. */
+          always read ffffffff and should not have any side effect.
+          Actually a few buggy systems can machine check. Allow the user
+          to disable it by command line option at least -AK */
+       if (!early_pci_allowed())
+               return;
+
+       check_intel();
 
        /* Poor man's PCI discovery */
        for (num = 0; num < 32; num++) {