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 void s390_do_machine_check(struct pt_regs *regs);
103
104 #endif /* __ASSEMBLY__ */
105 #endif /* _ASM_S390_NMI_H */