diff options
Diffstat (limited to 'include/asm-x86_64/hardirq.h')
| -rw-r--r-- | include/asm-x86_64/hardirq.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/include/asm-x86_64/hardirq.h b/include/asm-x86_64/hardirq.h new file mode 100644 index 00000000000..27c381fa1c9 --- /dev/null +++ b/include/asm-x86_64/hardirq.h @@ -0,0 +1,37 @@ +#ifndef __ASM_HARDIRQ_H +#define __ASM_HARDIRQ_H + +#include <linux/config.h> +#include <linux/threads.h> +#include <linux/irq.h> +#include <asm/pda.h> +#include <asm/apic.h> + +#define __ARCH_IRQ_STAT 1 + +/* Generate a lvalue for a pda member. Should fix softirq.c instead to use + special access macros. This would generate better code. */ +#define __IRQ_STAT(cpu,member) (read_pda(me)->member) + +#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */ + +/* + * 'what should we do if we get a hw irq event on an illegal vector'. + * each architecture has to answer this themselves. + */ +static inline void ack_bad_irq(unsigned int irq) +{ + printk("unexpected IRQ trap at vector %02x\n", irq); +#ifdef CONFIG_X86_LOCAL_APIC + /* + * Currently unexpected vectors happen only on SMP and APIC. + * We _must_ ack these because every local APIC has only N + * irq slots per priority level, and a 'hanging, unacked' IRQ + * holds up an irq slot - in excessive cases (when multiple + * unexpected vectors occur) that might lock up the APIC + * completely. + */ + ack_APIC_irq(); +#endif +} +#endif /* __ASM_HARDIRQ_H */ |