include/asm-ppc/irq_control.h

   1 /*
   2  * $Id: irq_control.h,v 1.8 1999/09/15 23:58:48 cort Exp $
   3  *
   4  * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
   5  */
   6 #ifndef _PPC_IRQ_CONTROL_H
   7 #define _PPC_IRQ_CONTROL_H
   8
   9 #include <asm/irq.h>
  10 #include <asm/atomic.h>
  11
  12 /* Structure describing interrupts */
  13 struct hw_interrupt_type {
  14         const char * typename;
  15         void (*startup)(unsigned int irq);
  16         void (*shutdown)(unsigned int irq);
  17         void (*enable)(unsigned int irq);
  18         void (*disable)(unsigned int irq);
  19         void (*mask_and_ack)(unsigned int irq);
  20         int irq_offset;
  21 };
  22
  23 struct irqdesc {
  24         struct irqaction *action;
  25         struct hw_interrupt_type *ctl;
  26 };
  27
  28 extern struct irqdesc irq_desc[NR_IRQS];
  29
  30 struct int_control_struct
  31 {
  32         void (*int_cli)(void);
  33         void (*int_sti)(void);
  34         void (*int_restore_flags)(unsigned long);
  35         void (*int_save_flags)(unsigned long *);
  36 };
  37 extern struct int_control_struct int_control;
  38 extern unsigned long timer_interrupt_intercept;
  39 extern unsigned long do_IRQ_intercept;
  40 void timer_interrupt(struct pt_regs *);
  41
  42 extern void __no_use_sti(void);
  43 extern void __no_use_cli(void);
  44 extern void __no_use_restore_flags(unsigned long);
  45 extern void __no_use_save_flags(unsigned long *);
  46
  47 #define __cli() int_control.int_cli()
  48 #define __sti() int_control.int_sti()
  49 #define __save_flags(flags) int_control.int_save_flags(&flags)
  50 #define __restore_flags(flags) int_control.int_restore_flags(flags)
  51 #define __save_and_cli(flags) ({__save_flags(flags);__cli();})
  52
  53 extern void do_lost_interrupts(unsigned long);
  54 extern atomic_t ppc_n_lost_interrupts;
  55
  56 #define mask_irq(irq) ({if (irq_desc[irq].ctl && irq_desc[irq].ctl->disable) irq_desc[irq].ctl->disable(irq);})
  57 #define unmask_irq(irq) ({if (irq_desc[irq].ctl && irq_desc[irq].ctl->enable) irq_desc[irq].ctl->enable(irq);})
  58 #define mask_and_ack_irq(irq) ({if (irq_desc[irq].ctl && irq_desc[irq].ctl->mask_and_ack) irq_desc[irq].ctl->mask_and_ack(irq);})
  59
  60 #endif /* _PPC_IRQ_CONTROL_H */