include/asm-m68k/atariints.h

/* */
This source file includes following definitions.
get_mfp_bit
set_mfp_bit
clear_mfp_bit
atari_enable_irq
atari_disable_irq
atari_turnon_irq
atari_turnoff_irq
atari_clear_pending_irq
atari_irq_pending
   1 /*
   2 ** atariints.h -- Atari Linux interrupt handling structs and prototypes
   3 **
   4 ** Copyright 1994 by Bj”rn Brauel
   5 **
   6 ** 5/2/94 Roman Hodek:
   7 **   TT interupt definitions added.
   8 **
   9 ** 12/02/96: (Roman)
  10 **   Adapted to new int handling scheme (see ataints.c); revised numbering
  11 **
  12 ** This file is subject to the terms and conditions of the GNU General Public
  13 ** License.  See the file README.legal in the main directory of this archive
  14 ** for more details.
  15 **
  16 */
  17 
  18 #ifndef _LINUX_ATARIINTS_H_
  19 #define _LINUX_ATARIINTS_H_
  20 
  21 #include <asm/irq.h>
  22 #include <asm/atarihw.h>
  23 
  24 /*
  25 ** Atari Interrupt sources.
  26 **
  27 */
  28 
  29 #define STMFP_SOURCE_BASE   8
  30 #define TTMFP_SOURCE_BASE   24
  31 #define SCC_SOURCE_BASE     40
  32 #define VME_SOURCE_BASE         56
  33 #define VME_MAX_SOURCES         16
  34 
  35 #define NUM_ATARI_SOURCES   (VME_SOURCE_BASE+VME_MAX_SOURCES-STMFP_SOURCE_BASE)
  36 
  37 /* convert vector number to int source number */
  38 #define IRQ_VECTOR_TO_SOURCE(v) ((v) - ((v) < 0x20 ? 0x18 : (0x40-8)))
  39 
  40 /* convert irq_handler index to vector number */
  41 #define IRQ_SOURCE_TO_VECTOR(i) ((i) + ((i) < 8 ? 0x18 : (0x40-8)))
  42 
  43 /* interrupt service types */
  44 #define IRQ_TYPE_SLOW     0
  45 #define IRQ_TYPE_FAST     1
  46 #define IRQ_TYPE_PRIO     2
  47 
  48 #define IRQ_SUPRIOUS      (IRQ_MACHSPEC | 0)
  49 
  50 /* auto-vector interrupts */
  51 #define IRQ_AUTO_1        (IRQ_MACHSPEC | 1)
  52 #define IRQ_AUTO_2        (IRQ_MACHSPEC | 2)
  53 #define IRQ_AUTO_3        (IRQ_MACHSPEC | 3)
  54 #define IRQ_AUTO_4        (IRQ_MACHSPEC | 4)
  55 #define IRQ_AUTO_5        (IRQ_MACHSPEC | 5)
  56 #define IRQ_AUTO_6        (IRQ_MACHSPEC | 6)
  57 #define IRQ_AUTO_7        (IRQ_MACHSPEC | 7)
  58 
  59 /* ST-MFP interrupts */
  60 #define IRQ_MFP_BUSY      (IRQ_MACHSPEC | 8)
  61 #define IRQ_MFP_DCD       (IRQ_MACHSPEC | 9)
  62 #define IRQ_MFP_CTS       (IRQ_MACHSPEC | 10)
  63 #define IRQ_MFP_GPU       (IRQ_MACHSPEC | 11)
  64 #define IRQ_MFP_TIMD      (IRQ_MACHSPEC | 12)
  65 #define IRQ_MFP_TIMC      (IRQ_MACHSPEC | 13)
  66 #define IRQ_MFP_ACIA      (IRQ_MACHSPEC | 14)
  67 #define IRQ_MFP_FDC       (IRQ_MACHSPEC | 15)
  68 #define IRQ_MFP_ACSI      IRQ_MFP_FDC
  69 #define IRQ_MFP_FSCSI     IRQ_MFP_FDC
  70 #define IRQ_MFP_IDE       IRQ_MFP_FDC
  71 #define IRQ_MFP_TIMB      (IRQ_MACHSPEC | 16)
  72 #define IRQ_MFP_SERERR    (IRQ_MACHSPEC | 17)
  73 #define IRQ_MFP_SEREMPT   (IRQ_MACHSPEC | 18)
  74 #define IRQ_MFP_RECERR    (IRQ_MACHSPEC | 19)
  75 #define IRQ_MFP_RECFULL   (IRQ_MACHSPEC | 20)
  76 #define IRQ_MFP_TIMA      (IRQ_MACHSPEC | 21)
  77 #define IRQ_MFP_RI        (IRQ_MACHSPEC | 22)
  78 #define IRQ_MFP_MMD       (IRQ_MACHSPEC | 23)
  79 
  80 /* TT-MFP interrupts */
  81 #define IRQ_TT_MFP_IO0       (IRQ_MACHSPEC | 24)
  82 #define IRQ_TT_MFP_IO1       (IRQ_MACHSPEC | 25)
  83 #define IRQ_TT_MFP_SCC       (IRQ_MACHSPEC | 26)
  84 #define IRQ_TT_MFP_RI        (IRQ_MACHSPEC | 27)
  85 #define IRQ_TT_MFP_TIMD      (IRQ_MACHSPEC | 28)
  86 #define IRQ_TT_MFP_TIMC      (IRQ_MACHSPEC | 29)
  87 #define IRQ_TT_MFP_DRVRDY    (IRQ_MACHSPEC | 30)
  88 #define IRQ_TT_MFP_SCSIDMA   (IRQ_MACHSPEC | 31)
  89 #define IRQ_TT_MFP_TIMB      (IRQ_MACHSPEC | 32)
  90 #define IRQ_TT_MFP_SERERR    (IRQ_MACHSPEC | 33)
  91 #define IRQ_TT_MFP_SEREMPT   (IRQ_MACHSPEC | 34)
  92 #define IRQ_TT_MFP_RECERR    (IRQ_MACHSPEC | 35)
  93 #define IRQ_TT_MFP_RECFULL   (IRQ_MACHSPEC | 36)
  94 #define IRQ_TT_MFP_TIMA      (IRQ_MACHSPEC | 37)
  95 #define IRQ_TT_MFP_RTC       (IRQ_MACHSPEC | 38)
  96 #define IRQ_TT_MFP_SCSI      (IRQ_MACHSPEC | 39)
  97 
  98 /* SCC interrupts */
  99 #define IRQ_SCCB_TX          (IRQ_MACHSPEC | 40)
 100 #define IRQ_SCCB_STAT        (IRQ_MACHSPEC | 42)
 101 #define IRQ_SCCB_RX          (IRQ_MACHSPEC | 44)
 102 #define IRQ_SCCB_SPCOND      (IRQ_MACHSPEC | 46)
 103 #define IRQ_SCCA_TX          (IRQ_MACHSPEC | 48)
 104 #define IRQ_SCCA_STAT        (IRQ_MACHSPEC | 50)
 105 #define IRQ_SCCA_RX          (IRQ_MACHSPEC | 52)
 106 #define IRQ_SCCA_SPCOND      (IRQ_MACHSPEC | 54)
 107 
 108 
 109 #define INT_CLK   24576     /* CLK while int_clk =2.456MHz and divide = 100 */
 110 #define INT_TICKS 246       /* to make sched_time = 99.902... HZ */
 111 
 112 
 113 #define MFP_ENABLE      0
 114 #define MFP_PENDING     1
 115 #define MFP_SERVICE     2
 116 #define MFP_MASK        3
 117 
 118 /* Utility functions for setting/clearing bits in the interrupt registers of
 119  * the MFP. 'type' should be constant, if 'irq' is constant, too, code size is
 120  * reduced. set_mfp_bit() is nonsense for PENDING and SERVICE registers. */
 121 
 122 static inline int get_mfp_bit( unsigned irq, int type )
     /*  */
 123 
 124 {       unsigned char   mask, *reg;
 125         
 126         mask = 1 << (irq & 7);
 127         reg = (unsigned char *)&mfp.int_en_a + type*4 +
 128                   ((irq & 8) >> 2) + (((irq-8) & 16) << 3);
 129         return( *reg & mask );
 130 }
 131 
 132 static inline void set_mfp_bit( unsigned irq, int type )
     /*  */
 133 
 134 {       unsigned char   mask, *reg;
 135         
 136         mask = 1 << (irq & 7);
 137         reg = (unsigned char *)&mfp.int_en_a + type*4 +
 138                   ((irq & 8) >> 2) + (((irq-8) & 16) << 3);
 139         __asm__ __volatile__ ( "orb %0,%1"
 140                               : : "di" (mask), "m" (*reg) : "memory" );
 141 }
 142 
 143 static inline void clear_mfp_bit( unsigned irq, int type )
     /*  */
 144 
 145 {       unsigned char   mask, *reg;
 146         
 147         mask = ~(1 << (irq & 7));
 148         reg = (unsigned char *)&mfp.int_en_a + type*4 +
 149                   ((irq & 8) >> 2) + (((irq-8) & 16) << 3);
 150         if (type == MFP_PENDING || type == MFP_SERVICE)
 151                 __asm__ __volatile__ ( "moveb %0,%1"
 152                                       : : "di" (mask), "m" (*reg) : "memory" );
 153         else
 154                 __asm__ __volatile__ ( "andb %0,%1"
 155                                       : : "di" (mask), "m" (*reg) : "memory" );
 156 }
 157 
 158 /*
 159  * {en,dis}able_irq have the usual semantics of temporary blocking the
 160  * interrupt, but not loosing requests that happen between disabling and
 161  * enabling. This is done with the MFP mask registers.
 162  */
 163 
 164 static inline void atari_enable_irq( unsigned irq )
     /*  */
 165 
 166 {
 167         irq &= ~IRQ_MACHSPEC;
 168         if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
 169         set_mfp_bit( irq, MFP_MASK );
 170 }
 171 
 172 static inline void atari_disable_irq( unsigned irq )
     /*  */
 173 
 174 {
 175         irq &= ~IRQ_MACHSPEC;
 176         if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
 177         clear_mfp_bit( irq, MFP_MASK );
 178 }
 179 
 180 /*
 181  * In opposite to {en,dis}able_irq, requests between turn{off,on}_irq are not
 182  * "stored"
 183  */
 184 
 185 extern inline void atari_turnon_irq( unsigned irq )
     /*  */
 186 
 187 {
 188         irq &= ~IRQ_MACHSPEC;
 189         if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
 190         set_mfp_bit( irq, MFP_ENABLE );
 191 }
 192 
 193 extern inline void atari_turnoff_irq( unsigned irq )
     /*  */
 194 
 195 {
 196         irq &= ~IRQ_MACHSPEC;
 197         if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
 198         clear_mfp_bit( irq, MFP_ENABLE );
 199         clear_mfp_bit( irq, MFP_PENDING );
 200 }
 201 
 202 extern inline void atari_clear_pending_irq( unsigned irq )
     /*  */
 203 
 204 {
 205         irq &= ~IRQ_MACHSPEC;
 206         if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return;
 207         clear_mfp_bit( irq, MFP_PENDING );
 208 }
 209 
 210 extern inline int atari_irq_pending( unsigned irq )
     /*  */
 211 
 212 {
 213         irq &= ~IRQ_MACHSPEC;
 214         if (irq < STMFP_SOURCE_BASE || irq >= SCC_SOURCE_BASE) return( 0 );
 215         return( get_mfp_bit( irq, MFP_PENDING ) );
 216 }
 217 
 218 unsigned long atari_register_vme_int( void );
 219 
 220 #endif /* linux/atariints.h */
/* */
root/include/asm-m68k/atariints.h

INCLUDED FROM

DEFINITIONS
