1 /*
2 * linux/arch/alpha/kernel/irq_impl.h
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 * Copyright (C) 1998, 2000 Richard Henderson
6 *
7 * This file contains declarations and inline functions for interfacing
8 * with the IRQ handling routines in irq.c.
9 */
10
11 #include <linux/interrupt.h>
12 #include <linux/irq.h>
13
14
15 #define RTC_IRQ 8
16
17 extern void isa_device_interrupt(unsigned long, struct pt_regs *);
18 extern void isa_no_iack_sc_device_interrupt(unsigned long, struct pt_regs *);
19 extern void srm_device_interrupt(unsigned long, struct pt_regs *);
20 extern void pyxis_device_interrupt(unsigned long, struct pt_regs *);
21
22 extern struct irqaction timer_irqaction;
23 extern struct irqaction isa_cascade_irqaction;
24 extern struct irqaction timer_cascade_irqaction;
25 extern struct irqaction halt_switch_irqaction;
26
27 extern void init_srm_irqs(long, unsigned long);
28 extern void init_pyxis_irqs(unsigned long);
29 extern void init_rtc_irq(void);
30
31 extern void common_init_isa_dma(void);
32
33 extern void i8259a_enable_irq(unsigned int);
34 extern void i8259a_disable_irq(unsigned int);
35 extern void i8259a_mask_and_ack_irq(unsigned int);
36 extern unsigned int i8259a_startup_irq(unsigned int);
37 extern void i8259a_end_irq(unsigned int);
38 extern struct hw_interrupt_type i8259a_irq_type;
39 extern void init_i8259a_irqs(void);
40
41 extern void handle_irq(int irq, struct pt_regs * regs);
42
43 extern unsigned long prof_cpu_mask;
44
45 static inline void
alpha_do_profile(unsigned long pc)46 alpha_do_profile(unsigned long pc)
47 {
48 extern char _stext;
49
50 if (!prof_buffer)
51 return;
52
53 /*
54 * Only measure the CPUs specified by /proc/irq/prof_cpu_mask.
55 * (default is all CPUs.)
56 */
57 if (!((1<<smp_processor_id()) & prof_cpu_mask))
58 return;
59
60 pc -= (unsigned long) &_stext;
61 pc >>= prof_shift;
62 /*
63 * Don't ignore out-of-bounds PC values silently,
64 * put them into the last histogram slot, so if
65 * present, they will show up as a sharp peak.
66 */
67 if (pc > prof_len - 1)
68 pc = prof_len - 1;
69 atomic_inc((atomic_t *)&prof_buffer[pc]);
70 }
71