Messages in this thread Patch in this message | | | Date | Thu, 10 Jul 2008 11:16:46 -0700 | From | Suresh Siddha <> | Subject | [patch 12/26] x64, x2apic/intr-remap: 8259 specific mask/unmask routines |
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8259 specific mask/unmask routines which be used later while enabling interrupt-remapping.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> ---
Index: tree-x86/arch/x86/kernel/i8259.c =================================================================== --- tree-x86.orig/arch/x86/kernel/i8259.c 2008-07-10 09:51:45.000000000 -0700 +++ tree-x86/arch/x86/kernel/i8259.c 2008-07-10 09:52:09.000000000 -0700 @@ -282,6 +282,30 @@ 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; Index: tree-x86/include/asm-x86/i8259.h =================================================================== --- tree-x86.orig/include/asm-x86/i8259.h 2008-07-10 09:51:45.000000000 -0700 +++ tree-x86/include/asm-x86/i8259.h 2008-07-10 09:52:09.000000000 -0700 @@ -57,4 +57,7 @@ extern struct irq_chip i8259A_chip; +extern void mask_8259A(void); +extern void unmask_8259A(void); + #endif /* __ASM_I8259_H__ */ --
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