include/asm-nios2nommu/irq.h

   1 /*
   2  * 21Mar2001    1.1    dgt/microtronix
   3  *
   4  * Copyright (C) 2004, Microtronix Datacom Ltd.
   5  *
   6  * All rights reserved.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  16  * NON INFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  *
  23  */
  24
  25
  26 #ifndef _NIOS2NOMMU_IRQ_H_
  27 #define _NIOS2NOMMU_IRQ_H_
  28
  29 extern void disable_irq(unsigned int);
  30 extern void enable_irq(unsigned int);
  31
  32 #include <linux/interrupt.h>
  33
  34 #define SYS_IRQS        32
  35 #define NR_IRQS         SYS_IRQS
  36
  37 /*
  38  * Interrupt source definitions
  39  * General interrupt sources are the level 1-7.
  40  * Adding an interrupt service routine for one of these sources
  41  * results in the addition of that routine to a chain of routines.
  42  * Each one is called in succession.  Each individual interrupt
  43  * service routine should determine if the device associated with
  44  * that routine requires service.
  45  */
  46
  47 #define IRQ01           (1)     /* level 1  interrupt */
  48 #define IRQ02           (2)     /* level 2  interrupt */
  49 #define IRQ03           (3)     /* level 3  interrupt */
  50 #define IRQ04           (4)     /* level 4  interrupt */
  51 #define IRQ05           (5)     /* level 5  interrupt */
  52 #define IRQ06           (6)     /* level 6  interrupt */
  53 #define IRQ07           (7)     /* level 7  interrupt */
  54 #define IRQ08           (8)     /* level 8  interrupt */
  55 #define IRQ09           (9)     /* level 9  interrupt */
  56 #define IRQ0A           (10)    /* level 10 interrupt */
  57 #define IRQ0B           (11)    /* level 11 interrupt */
  58 #define IRQ0C           (12)    /* level 12 interrupt */
  59 #define IRQ0D           (13)    /* level 13 interrupt */
  60 #define IRQ0E           (14)    /* level 14 interrupt */
  61 #define IRQ0F           (15)    /* level 15 interrupt */
  62 #define IRQ10           (16)    /* level 16 interrupt */
  63 #define IRQ12           (17)    /* level 17 interrupt */
  64 #define IRQ13           (18)    /* level 18 interrupt */
  65 #define IRQ14           (19)    /* level 19 interrupt */
  66 #define IRQ15           (20)    /* level 20 interrupt */
  67 #define IRQ16           (21)    /* level 21 interrupt */
  68 #define IRQ17           (22)    /* level 22 interrupt */
  69 #define IRQ18           (23)    /* level 23 interrupt */
  70 #define IRQ19           (24)    /* level 24 interrupt */
  71 #define IRQ1A           (25)    /* level 25 interrupt */
  72 #define IRQ1B           (26)    /* level 26 interrupt */
  73 #define IRQ1C           (27)    /* level 27 interrupt */
  74 #define IRQ1D           (28)    /* level 28 interrupt */
  75 #define IRQ1E           (29)    /* level 29 interrupt */
  76 #define IRQ1F           (30)    /* level 30 interrupt */
  77 #define IRQ20           (31)    /* level 31 interrupt */
  78 #define IRQ21           (32)    /* level 32 interrupt */
  79
  80 #define IRQMAX          IRQ21
  81
  82 /*
  83  * "Generic" interrupt sources
  84  */
  85
  86 /*
  87  * Machine specific interrupt sources.
  88  *
  89  * Adding an interrupt service routine for a source with this bit
  90  * set indicates a special machine specific interrupt source.
  91  * The machine specific files define these sources.
  92  *
  93  * Removed, they are not used by any one.
  94  */
  95
  96 /*
  97  * various flags for request_irq()
  98  */
  99 #define IRQ_FLG_LOCK    (0x0001)        /* handler is not replaceable   */
 100 #define IRQ_FLG_REPLACE (0x0002)        /* replace existing handler     */
 101 #define IRQ_FLG_FAST    (0x0004)
 102 #define IRQ_FLG_SLOW    (0x0008)
 103 #define IRQ_FLG_STD     (0x8000)        /* internally used              */
 104
 105 /*
 106  * Functions to set and clear the interrupt mask.
 107  */
 108
 109 /*
 110  * Use a zero to clean the bit.
 111  */
 112 static inline void clrimr(int mask)
 113 {
 114         int flags;
 115
 116         local_irq_save(flags);
 117         __asm__ __volatile__(
 118         "rdctl  r8, ienable\n"
 119         "and    r8,r8,%0\n"
 120         "wrctl  ienable, r8\n"
 121         : /* No output */
 122         : "r" (mask)
 123         : "r8");
 124         local_irq_restore(flags);
 125 }
 126
 127 /*
 128  * Use a one to set the bit.
 129  */
 130 static inline void setimr(int mask)
 131 {
 132         int flags;
 133
 134         local_irq_save(flags);
 135         __asm__ __volatile__(
 136         "rdctl  r8, ienable\n"
 137         "or     r8,r8,%0\n"
 138         "wrctl  ienable, r8\n"
 139         : /* No output */
 140         : "r" (mask)
 141         : "r8");
 142         local_irq_restore(flags);
 143 }
 144
 145 /*
 146  * This structure is used to chain together the ISRs for a particular
 147  * interrupt source (if it supports chaining).
 148  */
 149 typedef struct irq_node {
 150         irq_handler_t   handler;
 151         unsigned long   flags;
 152         void            *dev_id;
 153         const char      *devname;
 154         struct irq_node *next;
 155 } irq_node_t;
 156
 157 /*
 158  * This function returns a new irq_node_t
 159  */
 160 extern irq_node_t *new_irq_node(void);
 161
 162 /*
 163  * This structure has only 4 elements for speed reasons
 164  */
 165 typedef struct irq_hand {
 166         irq_handler_t   handler;
 167         unsigned long   flags;
 168         void            *dev_id;
 169         const char      *devname;
 170 } irq_hand_t;
 171
 172 /* count of spurious interrupts */
 173 extern volatile unsigned int num_spurious;
 174
 175 #define disable_irq_nosync(i) disable_irq(i)
 176
 177 #ifndef irq_canonicalize
 178 #define irq_canonicalize(i)     (i)
 179 #endif
 180
 181 #endif /* _NIOS2NOMMU_IRQ_H_ */