include/asm-sparc64/irq.h

   1 /* $Id: irq.h,v 1.21 2002/01/23 11:27:36 davem Exp $
   2  * irq.h: IRQ registers on the 64-bit Sparc.
   3  *
   4  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   5  * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
   6  */
   7
   8 #ifndef _SPARC64_IRQ_H
   9 #define _SPARC64_IRQ_H
  10
  11 #include <linux/config.h>
  12 #include <linux/linkage.h>
  13 #include <linux/kernel.h>
  14 #include <linux/errno.h>
  15 #include <linux/interrupt.h>
  16 #include <asm/pil.h>
  17 #include <asm/ptrace.h>
  18
  19 struct ino_bucket;
  20
  21 #define MAX_IRQ_DESC_ACTION     4
  22
  23 struct irq_desc {
  24         void                    (*pre_handler)(struct ino_bucket *, void *, void *);
  25         void                    *pre_handler_arg1;
  26         void                    *pre_handler_arg2;
  27         u32                     action_active_mask;
  28         struct irqaction        action[MAX_IRQ_DESC_ACTION];
  29 };
  30
  31 /* You should not mess with this directly. That's the job of irq.c.
  32  *
  33  * If you make changes here, please update hand coded assembler of
  34  * the vectored interrupt trap handler in entry.S -DaveM
  35  *
  36  * This is currently one DCACHE line, two buckets per L2 cache
  37  * line.  Keep this in mind please.
  38  */
  39 struct ino_bucket {
  40         /* Next handler in per-CPU PIL worklist.  We know that
  41          * bucket pointers have the high 32-bits clear, so to
  42          * save space we only store the bits we need.
  43          */
  44 /*0x00*/unsigned int irq_chain;
  45
  46         /* PIL to schedule this IVEC at. */
  47 /*0x04*/unsigned char pil;
  48
  49         /* If an IVEC arrives while irq_info is NULL, we
  50          * set this to notify request_irq() about the event.
  51          */
  52 /*0x05*/unsigned char pending;
  53
  54         /* Miscellaneous flags. */
  55 /*0x06*/unsigned char flags;
  56
  57         /* Currently unused.  */
  58 /*0x07*/unsigned char __pad;
  59
  60         /* Reference to IRQ descriptor for this bucket. */
  61 /*0x08*/struct irq_desc *irq_info;
  62
  63         /* Sun5 Interrupt Clear Register. */
  64 /*0x10*/unsigned long iclr;
  65
  66         /* Sun5 Interrupt Mapping Register. */
  67 /*0x18*/unsigned long imap;
  68
  69 };
  70
  71 /* IMAP/ICLR register defines */
  72 #define IMAP_VALID              0x80000000      /* IRQ Enabled          */
  73 #define IMAP_TID_UPA            0x7c000000      /* UPA TargetID         */
  74 #define IMAP_TID_JBUS           0x7c000000      /* JBUS TargetID        */
  75 #define IMAP_AID_SAFARI         0x7c000000      /* Safari AgentID       */
  76 #define IMAP_NID_SAFARI         0x03e00000      /* Safari NodeID        */
  77 #define IMAP_IGN                0x000007c0      /* IRQ Group Number     */
  78 #define IMAP_INO                0x0000003f      /* IRQ Number           */
  79 #define IMAP_INR                0x000007ff      /* Full interrupt number*/
  80
  81 #define ICLR_IDLE               0x00000000      /* Idle state           */
  82 #define ICLR_TRANSMIT           0x00000001      /* Transmit state       */
  83 #define ICLR_PENDING            0x00000003      /* Pending state        */
  84
  85 /* Only 8-bits are available, be careful.  -DaveM */
  86 #define IBF_PCI         0x02    /* PSYCHO/SABRE/SCHIZO PCI interrupt.    */
  87 #define IBF_ACTIVE      0x04    /* Interrupt is active and has a handler.*/
  88 #define IBF_INPROGRESS  0x10    /* IRQ is being serviced.                */
  89
  90 #define NUM_IVECS       (IMAP_INR + 1)
  91 extern struct ino_bucket ivector_table[NUM_IVECS];
  92
  93 #define __irq_ino(irq) \
  94         (((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0])
  95 #define __irq_pil(irq) ((struct ino_bucket *)(unsigned long)(irq))->pil
  96 #define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq))
  97 #define __irq(bucket) ((unsigned int)(unsigned long)(bucket))
  98
  99 static __inline__ char *__irq_itoa(unsigned int irq)
 100 {
 101         static char buff[16];
 102
 103         sprintf(buff, "%d,%x", __irq_pil(irq), (unsigned int)__irq_ino(irq));
 104         return buff;
 105 }
 106
 107 #define NR_IRQS    16
 108
 109 #define irq_canonicalize(irq)   (irq)
 110 extern void disable_irq(unsigned int);
 111 #define disable_irq_nosync disable_irq
 112 extern void enable_irq(unsigned int);
 113 extern unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long imap);
 114 extern unsigned int sbus_build_irq(void *sbus, unsigned int ino);
 115
 116 static __inline__ void set_softint(unsigned long bits)
 117 {
 118         __asm__ __volatile__("wr        %0, 0x0, %%set_softint"
 119                              : /* No outputs */
 120                              : "r" (bits));
 121 }
 122
 123 static __inline__ void clear_softint(unsigned long bits)
 124 {
 125         __asm__ __volatile__("wr        %0, 0x0, %%clear_softint"
 126                              : /* No outputs */
 127                              : "r" (bits));
 128 }
 129
 130 static __inline__ unsigned long get_softint(void)
 131 {
 132         unsigned long retval;
 133
 134         __asm__ __volatile__("rd        %%softint, %0"
 135                              : "=r" (retval));
 136         return retval;
 137 }
 138
 139 struct irqaction;
 140 struct pt_regs;
 141 int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
 142
 143 #endif