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 #define PSA_INT_GPR     ((u64*) 0x200)
  20 #define PSA_TMP_PSW     ((struct psw*) 0x280)
  21
  22 #define IO_INT_OLD_PSW  ((void*) 0x170)
  23 #define IO_INT_NEW_PSW  ((void*) 0x1f0)
  24 #define IO_INT_CODE     ((struct io_int_code*) 0xb8)
  25
  26 #define EXT_INT_OLD_PSW ((void*) 0x130)
  27 #define EXT_INT_NEW_PSW ((void*) 0x1b0)
  28 #define EXT_INT_CODE    ((u16*) 0x86)
  29
  30 #define SVC_INT_OLD_PSW ((void*) 0x140)
  31 #define SVC_INT_NEW_PSW ((void*) 0x1c0)
  32 #define SVC_INT_CODE    ((u16*) 0x8a)
  33
  34 #define PGM_INT_OLD_PSW ((void*) 0x150)
  35 #define PGM_INT_NEW_PSW ((void*) 0x1d0)
  36 #define PGM_INT_ILC     ((u8*) 0x8d)
  37 #define PGM_INT_CODE    ((u16*) 0x8e)
  38
  39 /*
  40  * Assembly stubs to call the C-handlers
  41  */
  42 extern void IO_INT(void);
  43 extern void EXT_INT(void);
  44 extern void SVC_INT(void);
  45 extern void PGM_INT(void);
  46 extern void MCH_INT(void);
  47
  48 /**
  49  * local_int_disable - disable interruptions & return old mask
  50  */
  51 #define local_int_disable() ({ \
  52         unsigned long __flags; \
  53         __asm__ __volatile__ ( \
  54                 "stnsm 0(%1),0xfc" : "=m" (__flags) : "a" (&__flags) ); \
  55         __flags; \
  56         })
  57
  58 /**
  59  * local_int_restore - restore interrupt mask
  60  * x:   mask to restore
  61  */
  62 #define local_int_restore(x) \
  63         __asm__ __volatile__("ssm   0(%0)" : : "a" (&x), "m" (x) : "memory")
  64
  65 /**
  66  * local_int_restore - restore interrupt mask
  67  * x:   mask to restore
  68  */
  69 static inline int interruptable()
  70 {
  71         u8 x;
  72
  73         __asm__ __volatile__(
  74                 "stosm   0(%0),0x00"
  75                 : /* out */
  76                 : /* in */
  77                  "a" (&x),
  78                  "m" (x)
  79                 : /* clobber */
  80                  "memory"
  81         );
  82
  83         return (x & 0x43) != 0;
  84 }
  85
  86 extern void set_timer(void);
  87
  88 /*
  89  * The Supervisor-Service call table
  90  */
  91 #define SVC_SCHEDULE            0
  92 #define SVC_SCHEDULE_BLOCKED    1
  93 #define SVC_SCHEDULE_EXIT       2
  94 #define NR_SVC                  3
  95 extern u64 svc_table[NR_SVC];
  96
  97 /* Interrupt handlers */
  98 extern void __pgm_int_handler(void);
  99 extern void __ext_int_handler(void);
 100 extern void __io_int_handler(void);
 101
 102 /* Interrupt handler stack pointer */
 103 extern u8 *int_stack_ptr;
 104
 105 #endif