include/asm/sigp.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __S390_ASM_SIGP_H
0003 #define __S390_ASM_SIGP_H
0004
0005 /* SIGP order codes */
0006 #define SIGP_SENSE            1
0007 #define SIGP_EXTERNAL_CALL        2
0008 #define SIGP_EMERGENCY_SIGNAL         3
0009 #define SIGP_START            4
0010 #define SIGP_STOP             5
0011 #define SIGP_RESTART              6
0012 #define SIGP_STOP_AND_STORE_STATUS    9
0013 #define SIGP_INITIAL_CPU_RESET       11
0014 #define SIGP_CPU_RESET           12
0015 #define SIGP_SET_PREFIX          13
0016 #define SIGP_STORE_STATUS_AT_ADDRESS 14
0017 #define SIGP_SET_ARCHITECTURE        18
0018 #define SIGP_COND_EMERGENCY_SIGNAL   19
0019 #define SIGP_SENSE_RUNNING       21
0020 #define SIGP_SET_MULTI_THREADING     22
0021 #define SIGP_STORE_ADDITIONAL_STATUS 23
0022
0023 /* SIGP condition codes */
0024 #define SIGP_CC_ORDER_CODE_ACCEPTED 0
0025 #define SIGP_CC_STATUS_STORED       1
0026 #define SIGP_CC_BUSY            2
0027 #define SIGP_CC_NOT_OPERATIONAL     3
0028
0029 /* SIGP cpu status bits */
0030
0031 #define SIGP_STATUS_INVALID_ORDER   0x00000002UL
0032 #define SIGP_STATUS_CHECK_STOP      0x00000010UL
0033 #define SIGP_STATUS_STOPPED     0x00000040UL
0034 #define SIGP_STATUS_EXT_CALL_PENDING    0x00000080UL
0035 #define SIGP_STATUS_INVALID_PARAMETER   0x00000100UL
0036 #define SIGP_STATUS_INCORRECT_STATE 0x00000200UL
0037 #define SIGP_STATUS_NOT_RUNNING     0x00000400UL
0038
0039 #ifndef __ASSEMBLY__
0040
0041 static inline int ____pcpu_sigp(u16 addr, u8 order, unsigned long parm,
0042                 u32 *status)
0043 {
0044     union register_pair r1 = { .odd = parm, };
0045     int cc;
0046
0047     asm volatile(
0048         "   sigp    %[r1],%[addr],0(%[order])\n"
0049         "   ipm %[cc]\n"
0050         "   srl %[cc],28\n"
0051         : [cc] "=&d" (cc), [r1] "+&d" (r1.pair)
0052         : [addr] "d" (addr), [order] "a" (order)
0053         : "cc");
0054     *status = r1.even;
0055     return cc;
0056 }
0057
0058 static inline int __pcpu_sigp(u16 addr, u8 order, unsigned long parm,
0059                   u32 *status)
0060 {
0061     u32 _status;
0062     int cc;
0063
0064     cc = ____pcpu_sigp(addr, order, parm, &_status);
0065     if (status && cc == SIGP_CC_STATUS_STORED)
0066         *status = _status;
0067     return cc;
0068 }
0069
0070 #endif /* __ASSEMBLY__ */
0071
0072 #endif /* __S390_ASM_SIGP_H */