LXR linux/arch/s390/include/asm/sigp.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __S390_ASM_SIGP_H
   3#define __S390_ASM_SIGP_H
   4
   5/* SIGP order codes */
   6#define SIGP_SENSE                    1
   7#define SIGP_EXTERNAL_CALL            2
   8#define SIGP_EMERGENCY_SIGNAL         3
   9#define SIGP_START                    4
  10#define SIGP_STOP                     5
  11#define SIGP_RESTART                  6
  12#define SIGP_STOP_AND_STORE_STATUS    9
  13#define SIGP_INITIAL_CPU_RESET       11
  14#define SIGP_CPU_RESET               12
  15#define SIGP_SET_PREFIX              13
  16#define SIGP_STORE_STATUS_AT_ADDRESS 14
  17#define SIGP_SET_ARCHITECTURE        18
  18#define SIGP_COND_EMERGENCY_SIGNAL   19
  19#define SIGP_SENSE_RUNNING           21
  20#define SIGP_SET_MULTI_THREADING     22
  21#define SIGP_STORE_ADDITIONAL_STATUS 23
  22
  23/* SIGP condition codes */
  24#define SIGP_CC_ORDER_CODE_ACCEPTED 0
  25#define SIGP_CC_STATUS_STORED       1
  26#define SIGP_CC_BUSY                2
  27#define SIGP_CC_NOT_OPERATIONAL     3
  28
  29/* SIGP cpu status bits */
  30
  31#define SIGP_STATUS_INVALID_ORDER       0x00000002UL
  32#define SIGP_STATUS_CHECK_STOP          0x00000010UL
  33#define SIGP_STATUS_STOPPED             0x00000040UL
  34#define SIGP_STATUS_EXT_CALL_PENDING    0x00000080UL
  35#define SIGP_STATUS_INVALID_PARAMETER   0x00000100UL
  36#define SIGP_STATUS_INCORRECT_STATE     0x00000200UL
  37#define SIGP_STATUS_NOT_RUNNING         0x00000400UL
  38
  39#ifndef __ASSEMBLY__
  40
  41static inline int ____pcpu_sigp(u16 addr, u8 order, unsigned long parm,
  42                                u32 *status)
  43{
  44        union register_pair r1 = { .odd = parm, };
  45        int cc;
  46
  47        asm volatile(
  48                "       sigp    %[r1],%[addr],0(%[order])\n"
  49                "       ipm     %[cc]\n"
  50                "       srl     %[cc],28\n"
  51                : [cc] "=&d" (cc), [r1] "+&d" (r1.pair)
  52                : [addr] "d" (addr), [order] "a" (order)
  53                : "cc");
  54        *status = r1.even;
  55        return cc;
  56}
  57
  58static inline int __pcpu_sigp(u16 addr, u8 order, unsigned long parm,
  59                              u32 *status)
  60{
  61        u32 _status;
  62        int cc;
  63
  64        cc = ____pcpu_sigp(addr, order, parm, &_status);
  65        if (status && cc == SIGP_CC_STATUS_STORED)
  66                *status = _status;
  67        return cc;
  68}
  69
  70#endif /* __ASSEMBLY__ */
  71
  72#endif /* __S390_ASM_SIGP_H */
  73