aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/kernel/i8259.c
diff options
context:
space:
mode:
authorSuresh Siddha <suresh.b.siddha@intel.com>2008-07-10 11:16:46 -0700
committerIngo Molnar <mingo@elte.hu>2008-07-12 08:44:55 +0200
commitd94d93ca5cc36cd78c532def62772c98fe8ba5d7 (patch)
tree4f388f1005784e70947ffa4c3eadd24eb76b05ae /arch/x86/kernel/i8259.c
parent72b1e22dfcad1daca6906148fd956ffe404bb0bc (diff)
x64, x2apic/intr-remap: 8259 specific mask/unmask routines
8259 specific mask/unmask routines which be used later while enabling interrupt-remapping. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: akpm@linux-foundation.org Cc: arjan@linux.intel.com Cc: andi@firstfloor.org Cc: ebiederm@xmission.com Cc: jbarnes@virtuousgeek.org Cc: steiner@sgi.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/i8259.c')
-rw-r--r--arch/x86/kernel/i8259.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/kernel/i8259.c b/arch/x86/kernel/i8259.c
index dc92b49d920..4b8a53d841f 100644
--- a/arch/x86/kernel/i8259.c
+++ b/arch/x86/kernel/i8259.c
@@ -282,6 +282,30 @@ static int __init i8259A_init_sysfs(void)
device_initcall(i8259A_init_sysfs);
+void mask_8259A(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&i8259A_lock, flags);
+
+ outb(0xff, PIC_MASTER_IMR); /* mask all of 8259A-1 */
+ outb(0xff, PIC_SLAVE_IMR); /* mask all of 8259A-2 */
+
+ spin_unlock_irqrestore(&i8259A_lock, flags);
+}
+
+void unmask_8259A(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&i8259A_lock, flags);
+
+ outb(cached_master_mask, PIC_MASTER_IMR); /* restore master IRQ mask */
+ outb(cached_slave_mask, PIC_SLAVE_IMR); /* restore slave IRQ mask */
+
+ spin_unlock_irqrestore(&i8259A_lock, flags);
+}
+
void init_8259A(int auto_eoi)
{
unsigned long flags;