#include <asm/desc.h>
#include <asm/proto.h>
#include <asm/mach_apic.h>
+#include <asm/acpi.h>
#define __apicdebuginit __init
int sis_apic_bug; /* not actually supported, dummy for compile */
+static int no_timer_check;
+
static DEFINE_SPINLOCK(ioapic_lock);
/*
/*
* Find the pin to which IRQ[irq] (ISA) is connected
*/
-static int __init find_isa_irq_pin(int irq, int type)
+static int find_isa_irq_pin(int irq, int type)
{
int i;
void __apicdebuginit print_PIC(void)
{
- extern spinlock_t i8259A_lock;
unsigned int v;
unsigned long flags;
*/
void disable_IO_APIC(void)
{
+ int pin;
/*
* Clear the IO-APIC before rebooting:
*/
clear_IO_APIC();
- disconnect_bsp_APIC();
+ /*
+ * If the i82559 is routed through an IOAPIC
+ * Put that IOAPIC in virtual wire mode
+ * so legacy interrups can be delivered.
+ */
+ pin = find_isa_irq_pin(0, mp_ExtINT);
+ if (pin != -1) {
+ struct IO_APIC_route_entry entry;
+ unsigned long flags;
+
+ memset(&entry, 0, sizeof(entry));
+ entry.mask = 0; /* Enabled */
+ entry.trigger = 0; /* Edge */
+ entry.irr = 0;
+ entry.polarity = 0; /* High */
+ entry.delivery_status = 0;
+ entry.dest_mode = 0; /* Physical */
+ entry.delivery_mode = 7; /* ExtInt */
+ entry.vector = 0;
+ entry.dest.physical.physical_dest = 0;
+
+
+ /*
+ * Add it to the IO-APIC irq-routing table:
+ */
+ spin_lock_irqsave(&ioapic_lock, flags);
+ io_apic_write(0, 0x11+2*pin, *(((int *)&entry)+1));
+ io_apic_write(0, 0x10+2*pin, *(((int *)&entry)+0));
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ }
+
+ disconnect_bsp_APIC(pin != -1);
}
/*
* Ok, does IRQ0 through the IOAPIC work?
*/
unmask_IO_APIC_irq(0);
- if (timer_irq_works()) {
+ if (!no_timer_check && timer_irq_works()) {
nmi_watchdog_default();
if (nmi_watchdog == NMI_IO_APIC) {
disable_8259A_irq(0);
panic("IO-APIC + timer doesn't work! Try using the 'noapic' kernel parameter\n");
}
+static int __init notimercheck(char *s)
+{
+ no_timer_check = 1;
+ return 1;
+}
+__setup("no_timer_check", notimercheck);
+
/*
*
* IRQ's that are handled by the PIC in the MPS IOAPIC case.