2 * linux/arch/alpha/kernel/irq_impl.h
4 * Copyright (C) 1995 Linus Torvalds
5 * Copyright (C) 1998, 2000 Richard Henderson
7 * This file contains declarations and inline functions for interfacing
8 * with the IRQ handling routines in irq.c.
11 #include <linux/interrupt.h>
12 #include <linux/irq.h>
13 #include <linux/profile.h>
18 extern void isa_device_interrupt(unsigned long, struct pt_regs *);
19 extern void isa_no_iack_sc_device_interrupt(unsigned long, struct pt_regs *);
20 extern void srm_device_interrupt(unsigned long, struct pt_regs *);
21 extern void pyxis_device_interrupt(unsigned long, struct pt_regs *);
23 extern struct irqaction timer_irqaction;
24 extern struct irqaction isa_cascade_irqaction;
25 extern struct irqaction timer_cascade_irqaction;
26 extern struct irqaction halt_switch_irqaction;
28 extern void init_srm_irqs(long, unsigned long);
29 extern void init_pyxis_irqs(unsigned long);
30 extern void init_rtc_irq(void);
32 extern void common_init_isa_dma(void);
34 extern void i8259a_enable_irq(unsigned int);
35 extern void i8259a_disable_irq(unsigned int);
36 extern void i8259a_mask_and_ack_irq(unsigned int);
37 extern unsigned int i8259a_startup_irq(unsigned int);
38 extern void i8259a_end_irq(unsigned int);
39 extern struct hw_interrupt_type i8259a_irq_type;
40 extern void init_i8259a_irqs(void);
42 extern void handle_irq(int irq, struct pt_regs * regs);
44 extern unsigned long prof_cpu_mask;
47 alpha_do_profile(unsigned long pc)
55 * Only measure the CPUs specified by /proc/irq/prof_cpu_mask.
56 * (default is all CPUs.)
58 if (!((1<<smp_processor_id()) & prof_cpu_mask))
61 pc -= (unsigned long) &_stext;
64 * Don't ignore out-of-bounds PC values silently,
65 * put them into the last histogram slot, so if
66 * present, they will show up as a sharp peak.
68 if (pc > prof_len - 1)
70 atomic_inc((atomic_t *)&prof_buffer[pc]);