cp/include/interrupt.h

   1 /*
   2  * (C) Copyright 2007-2011  Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
   3  *
   4  * This file is released under the GPLv2.  See the COPYING file for more
   5  * details.
   6  */
   7
   8 #ifndef __INTERRUPT_H
   9 #define __INTERRUPT_H
  10
  11 /*
  12  * I/O interruptions specific constants & structures
  13  */
  14 struct io_int_code {
  15         u32 ssid;
  16         u32 param;
  17 } __attribute__((packed));
  18
  19 struct mch_int_code {
  20         u8 sd:1,                /* System Damage */
  21            pd:1,                /* Instruction-processing damage */
  22            sr:1,                /* System recovery */
  23            _pad0:1,
  24            cd:1,                /* Timing-facility damage */
  25            ed:1,                /* External damage */
  26            _pad1:1,
  27            dg:1;                /* Degradation */
  28         u8 w:1,                 /* Warning */
  29            cp:1,                /* Channel report pending */
  30            sp:1,                /* Service-processor damage */
  31            ck:1,                /* Channel-subsystem damage */
  32            _pad2:2,
  33            b:1,                 /* Backed up */
  34            _pad3:1;
  35         u8 se:1,                /* Storage error uncorrected */
  36            sc:1,                /* Storage error corrected */
  37            ke:1,                /* Storage-key error uncorrected */
  38            ds:1,                /* Storage degradation */
  39            wp:1,                /* PSW-MWP validity */
  40            ms:1,                /* PSW mask and key validity */
  41            pm:1,                /* PSW program-mask and condition-code validity */
  42            ia:1;                /* PSW-instruction-address validity */
  43         u8 fa:1,                /* Failing-storage-address validity */
  44            _pad4:1,
  45            ec:1,                /* External-damage-code */
  46            fp:1,                /* Floating-point-register validity */
  47            gr:1,                /* General-register validity */
  48            cr:1,                /* Control-register validity */
  49            _pad5:1,
  50            st:1;                /* Storage logical validity */
  51         u8 ie:1,                /* Indirect storage error */
  52            ar:1,                /* Access-register validity */
  53            da:1,                /* Delayed-access exception */
  54            _pad6:5;
  55         u8 _pad7:2,
  56            pr:1,                /* TOD-programable-register validity */
  57            fc:1,                /* Floating-point-control-register validity */
  58            ap:1,                /* Ancilary report */
  59            _pad8:1,
  60            ct:1,                /* CPU-timer validity */
  61            cc:1;                /* Clock-comparator validity */
  62         u8 _pad9;
  63         u8 _pad10;
  64 } __attribute__((packed));
  65
  66 #define PSA_INT_GPR     ((u64*) 0x200)
  67 #define PSA_TMP_PSW     ((struct psw*) 0x280)
  68
  69 #define IO_INT_OLD_PSW  ((void*) 0x170)
  70 #define IO_INT_NEW_PSW  ((void*) 0x1f0)
  71 #define IO_INT_CODE     ((struct io_int_code*) 0xb8)
  72
  73 #define EXT_INT_OLD_PSW ((void*) 0x130)
  74 #define EXT_INT_NEW_PSW ((void*) 0x1b0)
  75 #define EXT_INT_CODE    ((u16*) 0x86)
  76
  77 #define SVC_INT_OLD_PSW ((void*) 0x140)
  78 #define SVC_INT_NEW_PSW ((void*) 0x1c0)
  79 #define SVC_INT_CODE    ((u16*) 0x8a)
  80
  81 #define PGM_INT_OLD_PSW ((void*) 0x150)
  82 #define PGM_INT_NEW_PSW ((void*) 0x1d0)
  83 #define PGM_INT_ILC     ((u8*) 0x8d)
  84 #define PGM_INT_CODE    ((u16*) 0x8e)
  85
  86 #define MCH_INT_OLD_PSW ((void*) 0x160)
  87 #define MCH_INT_NEW_PSW ((void*) 0x1e0)
  88 #define MCH_INT_CODE    ((struct mch_int_code*) 232)
  89
  90 /*
  91  * Assembly stubs to call the C-handlers
  92  */
  93 extern void IO_INT(void);
  94 extern void EXT_INT(void);
  95 extern void SVC_INT(void);
  96 extern void PGM_INT(void);
  97 extern void MCH_INT(void);
  98
  99 /**
 100  * local_int_disable - disable interruptions & return old mask
 101  */
 102 #define local_int_disable() ({ \
 103         unsigned long __flags; \
 104         __asm__ __volatile__ ( \
 105                 "stnsm 0(%1),0xfc" : "=m" (__flags) : "a" (&__flags) ); \
 106         __flags; \
 107         })
 108
 109 /**
 110  * local_int_restore - restore interrupt mask
 111  * x:   mask to restore
 112  */
 113 #define local_int_restore(x) \
 114         __asm__ __volatile__("ssm   0(%0)" : : "a" (&x), "m" (x) : "memory")
 115
 116 /**
 117  * local_int_restore - restore interrupt mask
 118  * x:   mask to restore
 119  */
 120 static inline int interruptable()
 121 {
 122         u8 x;
 123
 124         __asm__ __volatile__(
 125                 "stosm   0(%0),0x00"
 126                 : /* out */
 127                 : /* in */
 128                  "a" (&x),
 129                  "m" (x)
 130                 : /* clobber */
 131                  "memory"
 132         );
 133
 134         return (x & 0x43) != 0;
 135 }
 136
 137 extern void set_timer(void);
 138
 139 /*
 140  * The Supervisor-Service call table
 141  */
 142 #define SVC_SCHEDULE            0
 143 #define SVC_SCHEDULE_BLOCKED    1
 144 #define SVC_SCHEDULE_EXIT       2
 145 #define NR_SVC                  3
 146 extern u64 svc_table[NR_SVC];
 147
 148 /* Interrupt handlers */
 149 extern void __pgm_int_handler(void);
 150 extern void __ext_int_handler(void);
 151 extern void __io_int_handler(void);
 152
 153 /* Interrupt handler stack pointer */
 154 extern u8 *int_stack_ptr;
 155
 156 #endif