arch/s390/include/asm/sigp.h

   1 /*
   2  *  include/asm-s390/sigp.h
   3  *
   4  *  S390 version
   5  *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
   6  *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
   7  *               Martin Schwidefsky (schwidefsky@de.ibm.com)
   8  *               Heiko Carstens (heiko.carstens@de.ibm.com)
   9  *
  10  *  sigp.h by D.J. Barrow (c) IBM 1999
  11  *  contains routines / structures for signalling other S/390 processors in an
  12  *  SMP configuration.
  13  */
  14
  15 #ifndef __SIGP__
  16 #define __SIGP__
  17
  18 #include <asm/system.h>
  19
  20 /* get real cpu address from logical cpu number */
  21 extern int __cpu_logical_map[];
  22
  23 static inline int cpu_logical_map(int cpu)
  24 {
  25 #ifdef CONFIG_SMP
  26         return __cpu_logical_map[cpu];
  27 #else
  28         return stap();
  29 #endif
  30 }
  31
  32 typedef enum
  33 {
  34         sigp_unassigned=0x0,
  35         sigp_sense,
  36         sigp_external_call,
  37         sigp_emergency_signal,
  38         sigp_start,
  39         sigp_stop,
  40         sigp_restart,
  41         sigp_unassigned1,
  42         sigp_unassigned2,
  43         sigp_stop_and_store_status,
  44         sigp_unassigned3,
  45         sigp_initial_cpu_reset,
  46         sigp_cpu_reset,
  47         sigp_set_prefix,
  48         sigp_store_status_at_address,
  49         sigp_store_extended_status_at_address
  50 } sigp_order_code;
  51
  52 typedef __u32 sigp_status_word;
  53
  54 typedef enum
  55 {
  56         sigp_order_code_accepted=0,
  57         sigp_status_stored,
  58         sigp_busy,
  59         sigp_not_operational
  60 } sigp_ccode;
  61
  62
  63 /*
  64  * Definitions for the external call
  65  */
  66
  67 /* 'Bit' signals, asynchronous */
  68 typedef enum
  69 {
  70         ec_schedule=0,
  71         ec_call_function,
  72         ec_call_function_single,
  73         ec_bit_last
  74 } ec_bit_sig;
  75
  76 /*
  77  * Signal processor
  78  */
  79 static inline sigp_ccode
  80 signal_processor(__u16 cpu_addr, sigp_order_code order_code)
  81 {
  82         register unsigned long reg1 asm ("1") = 0;
  83         sigp_ccode ccode;
  84
  85         asm volatile(
  86                 "       sigp    %1,%2,0(%3)\n"
  87                 "       ipm     %0\n"
  88                 "       srl     %0,28\n"
  89                 :       "=d"    (ccode)
  90                 : "d" (reg1), "d" (cpu_logical_map(cpu_addr)),
  91                   "a" (order_code) : "cc" , "memory");
  92         return ccode;
  93 }
  94
  95 /*
  96  * Signal processor with parameter
  97  */
  98 static inline sigp_ccode
  99 signal_processor_p(__u32 parameter, __u16 cpu_addr, sigp_order_code order_code)
 100 {
 101         register unsigned int reg1 asm ("1") = parameter;
 102         sigp_ccode ccode;
 103
 104         asm volatile(
 105                 "       sigp    %1,%2,0(%3)\n"
 106                 "       ipm     %0\n"
 107                 "       srl     %0,28\n"
 108                 : "=d" (ccode)
 109                 : "d" (reg1), "d" (cpu_logical_map(cpu_addr)),
 110                   "a" (order_code) : "cc" , "memory");
 111         return ccode;
 112 }
 113
 114 /*
 115  * Signal processor with parameter and return status
 116  */
 117 static inline sigp_ccode
 118 signal_processor_ps(__u32 *statusptr, __u32 parameter, __u16 cpu_addr,
 119                     sigp_order_code order_code)
 120 {
 121         register unsigned int reg1 asm ("1") = parameter;
 122         sigp_ccode ccode;
 123
 124         asm volatile(
 125                 "       sigp    %1,%2,0(%3)\n"
 126                 "       ipm     %0\n"
 127                 "       srl     %0,28\n"
 128                 : "=d" (ccode), "+d" (reg1)
 129                 : "d" (cpu_logical_map(cpu_addr)), "a" (order_code)
 130                 : "cc" , "memory");
 131         *statusptr = reg1;
 132         return ccode;
 133 }
 134
 135 #endif /* __SIGP__ */