diff options
| author | Maciej W. Rozycki <macro@linux-mips.org> | 2008-07-01 01:19:31 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-10 11:04:05 +0200 |
| commit | 0b9f4f49e2abe787673de8f1f56f053fb30fec24 (patch) | |
| tree | 1fc290c2f215ba28aa6c73bdd8ae4f6b39d901f7 /arch/x86 | |
| parent | c9076b63191ec799ba6848ce5603fff109da57d2 (diff) | |
x86: I/O APIC: Add a 64-bit variation of replace_pin_at_irq()
When an interrupt is rerouted to a different I/O APIC pin the relevant
entry of the irq_2_pin list should get updated accordingly so that
operations are performed on the correct redirection entry.
This is already done by the 32-bit variation of the code and here is a
complementing 64-bit implementation. Should make someone's decision less
tough when merging the two. ;)
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/io_apic_64.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c index f930885ac66..848411753c7 100644 --- a/arch/x86/kernel/io_apic_64.c +++ b/arch/x86/kernel/io_apic_64.c @@ -373,6 +373,26 @@ static void add_pin_to_irq(unsigned int irq, int apic, int pin) entry->pin = pin; } +/* + * Reroute an IRQ to a different pin. + */ +static void __init replace_pin_at_irq(unsigned int irq, + int oldapic, int oldpin, + int newapic, int newpin) +{ + struct irq_pin_list *entry = irq_2_pin + irq; + + while (1) { + if (entry->apic == oldapic && entry->pin == oldpin) { + entry->apic = newapic; + entry->pin = newpin; + } + if (!entry->next) + break; + entry = irq_2_pin + entry->next; + } +} + #define DO_ACTION(name,R,ACTION, FINAL) \ \ @@ -1735,7 +1755,7 @@ static inline void __init check_timer(void) /* * legacy devices should be connected to IO APIC #0 */ - /* replace_pin_at_irq(0, apic1, pin1, apic2, pin2); */ + replace_pin_at_irq(0, apic1, pin1, apic2, pin2); setup_timer_IRQ0_pin(apic2, pin2, cfg->vector); unmask_IO_APIC_irq(0); enable_8259A_irq(0); |