1/*
2 *  arch/s390/kernel/s390mach.h
3 *   S/390 data definitions for machine check processing
4 *
5 *  S390 version
6 *    Copyright (C) 2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 *    Author(s): Ingo Adlung (adlung@de.ibm.com)
8 */
9
10#ifndef __s390mach_h
11#define __s390mach_h
12
13#include <asm/types.h>
14
15typedef struct _mci {
16	__u32   sd              :  1; /* 00 system damage */
17	__u32   pd              :  1; /* 01 instruction-processing damage */
18	__u32   sr              :  1; /* 02 system recovery */
19	__u32   to_be_defined_1 :  4; /* 03-06 */
20	__u32   dg              :  1; /* 07 degradation */
21	__u32   w               :  1; /* 08 warning pending */
22	__u32   cp              :  1; /* 09 channel-report pending */
23	__u32   to_be_defined_2 :  6; /* 10-15 */
24	__u32   se              :  1; /* 16 storage error uncorrected */
25	__u32   sc              :  1; /* 17 storage error corrected */
26	__u32   ke              :  1; /* 18 storage-key error uncorrected */
27	__u32   ds              :  1; /* 19 storage degradation */
28	__u32	to_be_defined_3 :  4; /* 20-23 */
29	__u32   fa              :  1; /* 24 failing storage address validity */
30	__u32   to_be_defined_4 :  7; /* 25-31 */
31	__u32   ie              :  1; /* 32 indirect storage error */
32	__u32	to_be_defined_5 : 31; /* 33-63 */
33	} mci_t;
34
35//
36// machine-check-interruption code
37//
38typedef struct _mcic {
39   union _mcc {
40      __u64 mcl;	/* machine check int. code - long info */
41      mci_t mcd;  /* machine check int. code - details   */
42   } mcc;
43} __attribute__ ((packed)) mcic_t;
44
45//
46// Channel Report Word
47//
48typedef struct _crw {
49	__u32 res1    :  1;   /* reserved zero */
50	__u32 slct    :  1;   /* solicited */
51	__u32 oflw    :  1;   /* overflow */
52	__u32 chn     :  1;   /* chained */
53	__u32 rsc     :  4;   /* reporting source code */
54	__u32 anc     :  1;   /* ancillary report */
55	__u32 res2    :  1;   /* reserved zero */
56	__u32 erc     :  6;   /* error-recovery code */
57	__u32 rsid    : 16;   /* reporting-source ID */
58} __attribute__ ((packed)) crw_t;
59
60#define CRW_RSC_MONITOR  0x2  /* monitoring facility */
61#define CRW_RSC_SCH      0x3  /* subchannel */
62#define CRW_RSC_CPATH    0x4  /* channel path */
63#define CRW_RSC_CONFIG   0x9  /* configuration-alert facility */
64#define CRW_RSC_CSS      0xB  /* channel subsystem */
65
66#define CRW_ERC_EVENT    0x00 /* event information pending */
67#define CRW_ERC_AVAIL    0x01 /* available */
68#define CRW_ERC_INIT     0x02 /* initialized */
69#define CRW_ERC_TERROR   0x03 /* temporary error */
70#define CRW_ERC_IPARM    0x04 /* installed parm initialized */
71#define CRW_ERC_TERM     0x05 /* terminal */
72#define CRW_ERC_PERRN    0x06 /* perm. error, fac. not init */
73#define CRW_ERC_PERRI    0x07 /* perm. error, facility init */
74#define CRW_ERC_PMOD     0x08 /* installed parameters modified */
75
76#define MAX_CRW_PENDING  1024
77#define MAX_MACH_PENDING 1024
78
79//
80// CRW Entry
81//
82typedef struct _crwe {
83	crw_t   crw;
84	struct _crwe *crwe_next;
85} __attribute__ ((packed)) crwe_t;
86
87typedef struct _mache {
88	spinlock_t     lock;
89	unsigned int   status;
90	mcic_t         mcic;
91	union _mc {
92	   crwe_t     *crwe;		/* CRW if applicable */
93   } mc;
94	struct _mache *next;
95	struct _mache *prev;
96} mache_t;
97
98#define MCHCHK_STATUS_TO_PROCESS    0x00000001
99#define MCHCHK_STATUS_IN_PROGRESS   0x00000002
100#define MCHCHK_STATUS_WAITING       0x00000004
101
102void s390_init_machine_check( void );
103void s390_do_machine_check  ( void );
104void s390_do_crw_pending    ( crwe_t *pcrwe );
105
106extern __inline__ int stcrw( __u32 *pcrw )
107{
108        int ccode;
109
110        __asm__ __volatile__(
111                "STCRW 0(%1)\n\t"
112                "IPM %0\n\t"
113                "SRL %0,28\n\t"
114                : "=d" (ccode) : "a" (pcrw)
115                : "cc", "1" );
116        return ccode;
117}
118
119#endif /* __s390mach */
120