5580eceed2
This prevents running out of GSIs on large Unisys ES7000 machines. Follows i386 Cc: "Protasevich, Natalie" <Natalie.Protasevich@unisys.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
#ifndef _ASM_IRQ_H
|
|
#define _ASM_IRQ_H
|
|
|
|
/*
|
|
* linux/include/asm/irq.h
|
|
*
|
|
* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
|
|
*
|
|
* IRQ/IPI changes taken from work by Thomas Radke
|
|
* <tomsoft@informatik.tu-chemnitz.de>
|
|
*/
|
|
|
|
#define TIMER_IRQ 0
|
|
|
|
/*
|
|
* 16 8259A IRQ's, 208 potential APIC interrupt sources.
|
|
* Right now the APIC is mostly only used for SMP.
|
|
* 256 vectors is an architectural limit. (we can have
|
|
* more than 256 devices theoretically, but they will
|
|
* have to use shared interrupts)
|
|
* Since vectors 0x00-0x1f are used/reserved for the CPU,
|
|
* the usable vector space is 0x20-0xff (224 vectors)
|
|
*/
|
|
|
|
/*
|
|
* The maximum number of vectors supported by x86_64 processors
|
|
* is limited to 256. For processors other than x86_64, NR_VECTORS
|
|
* should be changed accordingly.
|
|
*/
|
|
#define NR_VECTORS 256
|
|
|
|
#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
#define NR_IRQS FIRST_SYSTEM_VECTOR
|
|
#define NR_IRQ_VECTORS NR_IRQS
|
|
#else
|
|
#define NR_IRQS 224
|
|
#define NR_IRQ_VECTORS (32 * NR_CPUS)
|
|
#endif
|
|
|
|
static __inline__ int irq_canonicalize(int irq)
|
|
{
|
|
return ((irq == 2) ? 9 : irq);
|
|
}
|
|
|
|
#ifdef CONFIG_X86_LOCAL_APIC
|
|
#define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */
|
|
#endif
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
#include <linux/cpumask.h>
|
|
extern void fixup_irqs(cpumask_t map);
|
|
#endif
|
|
|
|
#define __ARCH_HAS_DO_SOFTIRQ 1
|
|
|
|
#endif /* _ASM_IRQ_H */
|