arch/s390/include/asm/nmi.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *   Machine check handler definitions
   4  *
   5  *    Copyright IBM Corp. 2000, 2009
   6  *    Author(s): Ingo Adlung <adlung@de.ibm.com>,
   7  *               Martin Schwidefsky <schwidefsky@de.ibm.com>,
   8  *               Cornelia Huck <cornelia.huck@de.ibm.com>,
   9  *               Heiko Carstens <heiko.carstens@de.ibm.com>,
  10  */
  11
  12 #ifndef _ASM_S390_NMI_H
  13 #define _ASM_S390_NMI_H
  14
  15 #include <linux/bits.h>
  16 #include <linux/types.h>
  17
  18 #define MCIC_SUBCLASS_MASK      (1ULL<<63 | 1ULL<<62 | 1ULL<<61 | \
  19                                 1ULL<<59 | 1ULL<<58 | 1ULL<<56 | \
  20                                 1ULL<<55 | 1ULL<<54 | 1ULL<<53 | \
  21                                 1ULL<<52 | 1ULL<<47 | 1ULL<<46 | \
  22                                 1ULL<<45 | 1ULL<<44)
  23 #define MCCK_CODE_SYSTEM_DAMAGE         BIT(63)
  24 #define MCCK_CODE_EXT_DAMAGE            BIT(63 - 5)
  25 #define MCCK_CODE_CP                    BIT(63 - 9)
  26 #define MCCK_CODE_CPU_TIMER_VALID       BIT(63 - 46)
  27 #define MCCK_CODE_PSW_MWP_VALID         BIT(63 - 20)
  28 #define MCCK_CODE_PSW_IA_VALID          BIT(63 - 23)
  29 #define MCCK_CODE_CR_VALID              BIT(63 - 29)
  30 #define MCCK_CODE_GS_VALID              BIT(63 - 36)
  31 #define MCCK_CODE_FC_VALID              BIT(63 - 43)
  32
  33 #ifndef __ASSEMBLY__
  34
  35 union mci {
  36         unsigned long val;
  37         struct {
  38                 u64 sd :  1; /* 00 system damage */
  39                 u64 pd :  1; /* 01 instruction-processing damage */
  40                 u64 sr :  1; /* 02 system recovery */
  41                 u64    :  1; /* 03 */
  42                 u64 cd :  1; /* 04 timing-facility damage */
  43                 u64 ed :  1; /* 05 external damage */
  44                 u64    :  1; /* 06 */
  45                 u64 dg :  1; /* 07 degradation */
  46                 u64 w  :  1; /* 08 warning pending */
  47                 u64 cp :  1; /* 09 channel-report pending */
  48                 u64 sp :  1; /* 10 service-processor damage */
  49                 u64 ck :  1; /* 11 channel-subsystem damage */
  50                 u64    :  2; /* 12-13 */
  51                 u64 b  :  1; /* 14 backed up */
  52                 u64    :  1; /* 15 */
  53                 u64 se :  1; /* 16 storage error uncorrected */
  54                 u64 sc :  1; /* 17 storage error corrected */
  55                 u64 ke :  1; /* 18 storage-key error uncorrected */
  56                 u64 ds :  1; /* 19 storage degradation */
  57                 u64 wp :  1; /* 20 psw mwp validity */
  58                 u64 ms :  1; /* 21 psw mask and key validity */
  59                 u64 pm :  1; /* 22 psw program mask and cc validity */
  60                 u64 ia :  1; /* 23 psw instruction address validity */
  61                 u64 fa :  1; /* 24 failing storage address validity */
  62                 u64 vr :  1; /* 25 vector register validity */
  63                 u64 ec :  1; /* 26 external damage code validity */
  64                 u64 fp :  1; /* 27 floating point register validity */
  65                 u64 gr :  1; /* 28 general register validity */
  66                 u64 cr :  1; /* 29 control register validity */
  67                 u64    :  1; /* 30 */
  68                 u64 st :  1; /* 31 storage logical validity */
  69                 u64 ie :  1; /* 32 indirect storage error */
  70                 u64 ar :  1; /* 33 access register validity */
  71                 u64 da :  1; /* 34 delayed access exception */
  72                 u64    :  1; /* 35 */
  73                 u64 gs :  1; /* 36 guarded storage registers validity */
  74                 u64    :  5; /* 37-41 */
  75                 u64 pr :  1; /* 42 tod programmable register validity */
  76                 u64 fc :  1; /* 43 fp control register validity */
  77                 u64 ap :  1; /* 44 ancillary report */
  78                 u64    :  1; /* 45 */
  79                 u64 ct :  1; /* 46 cpu timer validity */
  80                 u64 cc :  1; /* 47 clock comparator validity */
  81                 u64    : 16; /* 47-63 */
  82         };
  83 };
  84
  85 #define MCESA_ORIGIN_MASK       (~0x3ffUL)
  86 #define MCESA_LC_MASK           (0xfUL)
  87 #define MCESA_MIN_SIZE          (1024)
  88 #define MCESA_MAX_SIZE          (2048)
  89
  90 struct mcesa {
  91         u8 vector_save_area[1024];
  92         u8 guarded_storage_save_area[32];
  93 };
  94
  95 struct pt_regs;
  96
  97 void nmi_alloc_boot_cpu(struct lowcore *lc);
  98 int nmi_alloc_per_cpu(struct lowcore *lc);
  99 void nmi_free_per_cpu(struct lowcore *lc);
 100
 101 void s390_handle_mcck(void);
 102 int s390_do_machine_check(struct pt_regs *regs);
 103
 104 #endif /* __ASSEMBLY__ */
 105 #endif /* _ASM_S390_NMI_H */