#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>
+
+#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)
{
- /* According to Nvidia all timer overrides are bogus. Just ignore
- them all. */
+#ifdef CONFIG_ACPI
+ /* According to Nvidia all timer overrides are bogus unless HPET
+ is enabled. */
if (vendor == PCI_VENDOR_ID_NVIDIA) {
- acpi_skip_timer_override = 1;
+ nvidia_hpet_detected = 0;
+ acpi_table_parse(ACPI_HPET, nvidia_hpet_check);
+ if (nvidia_hpet_detected == 0) {
+ acpi_skip_timer_override = 1;
+ }
+ }
+#endif
+ if (vendor == PCI_VENDOR_ID_ATI && timer_over_8254 == 1) {
+ timer_over_8254 = 0;
+ printk(KERN_INFO "ATI board detected. Disabling timer routing "
+ "over 8254.\n");
}
return 0;
}