[S390] kdump backend code
[linux-3.10.git] / arch / s390 / include / asm / ipl.h
1 /*
2  * s390 (re)ipl support
3  *
4  * Copyright IBM Corp. 2007
5  */
6
7 #ifndef _ASM_S390_IPL_H
8 #define _ASM_S390_IPL_H
9
10 #include <asm/types.h>
11 #include <asm/cio.h>
12 #include <asm/setup.h>
13
14 #define IPL_PARMBLOCK_ORIGIN    0x2000
15
16 #define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
17                               sizeof(struct ipl_block_fcp))
18
19 #define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 8)
20
21 #define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
22                               sizeof(struct ipl_block_ccw))
23
24 #define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 8)
25
26 #define IPL_MAX_SUPPORTED_VERSION (0)
27
28 #define IPL_PARMBLOCK_START     ((struct ipl_parameter_block *) \
29                                  IPL_PARMBLOCK_ORIGIN)
30 #define IPL_PARMBLOCK_SIZE      (IPL_PARMBLOCK_START->hdr.len)
31
32 struct ipl_list_hdr {
33         u32 len;
34         u8  reserved1[3];
35         u8  version;
36         u32 blk0_len;
37         u8  pbt;
38         u8  flags;
39         u16 reserved2;
40 } __attribute__((packed));
41
42 struct ipl_block_fcp {
43         u8  reserved1[313-1];
44         u8  opt;
45         u8  reserved2[3];
46         u16 reserved3;
47         u16 devno;
48         u8  reserved4[4];
49         u64 wwpn;
50         u64 lun;
51         u32 bootprog;
52         u8  reserved5[12];
53         u64 br_lba;
54         u32 scp_data_len;
55         u8  reserved6[260];
56         u8  scp_data[];
57 } __attribute__((packed));
58
59 #define DIAG308_VMPARM_SIZE     64
60 #define DIAG308_SCPDATA_SIZE    (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
61                                  offsetof(struct ipl_block_fcp, scp_data)))
62
63 struct ipl_block_ccw {
64         u8  load_parm[8];
65         u8  reserved1[84];
66         u8  reserved2[2];
67         u16 devno;
68         u8  vm_flags;
69         u8  reserved3[3];
70         u32 vm_parm_len;
71         u8  nss_name[8];
72         u8  vm_parm[DIAG308_VMPARM_SIZE];
73         u8  reserved4[8];
74 } __attribute__((packed));
75
76 struct ipl_parameter_block {
77         struct ipl_list_hdr hdr;
78         union {
79                 struct ipl_block_fcp fcp;
80                 struct ipl_block_ccw ccw;
81         } ipl_info;
82 } __attribute__((packed,aligned(4096)));
83
84 /*
85  * IPL validity flags
86  */
87 extern u32 ipl_flags;
88 extern u32 dump_prefix_page;
89 extern unsigned int zfcpdump_prefix_array[];
90
91 extern void do_reipl(void);
92 extern void do_halt(void);
93 extern void do_poff(void);
94 extern void ipl_save_parameters(void);
95 extern void ipl_update_parameters(void);
96 extern size_t append_ipl_vmparm(char *, size_t);
97 extern size_t append_ipl_scpdata(char *, size_t);
98
99 enum {
100         IPL_DEVNO_VALID         = 1,
101         IPL_PARMBLOCK_VALID     = 2,
102         IPL_NSS_VALID           = 4,
103 };
104
105 enum ipl_type {
106         IPL_TYPE_UNKNOWN        = 1,
107         IPL_TYPE_CCW            = 2,
108         IPL_TYPE_FCP            = 4,
109         IPL_TYPE_FCP_DUMP       = 8,
110         IPL_TYPE_NSS            = 16,
111 };
112
113 struct ipl_info
114 {
115         enum ipl_type type;
116         union {
117                 struct {
118                         struct ccw_dev_id dev_id;
119                 } ccw;
120                 struct {
121                         struct ccw_dev_id dev_id;
122                         u64 wwpn;
123                         u64 lun;
124                 } fcp;
125                 struct {
126                         char name[NSS_NAME_SIZE + 1];
127                 } nss;
128         } data;
129 };
130
131 extern struct ipl_info ipl_info;
132 extern void setup_ipl(void);
133
134 /*
135  * DIAG 308 support
136  */
137 enum diag308_subcode  {
138         DIAG308_REL_HSA = 2,
139         DIAG308_IPL     = 3,
140         DIAG308_DUMP    = 4,
141         DIAG308_SET     = 5,
142         DIAG308_STORE   = 6,
143 };
144
145 enum diag308_ipl_type {
146         DIAG308_IPL_TYPE_FCP    = 0,
147         DIAG308_IPL_TYPE_CCW    = 2,
148 };
149
150 enum diag308_opt {
151         DIAG308_IPL_OPT_IPL     = 0x10,
152         DIAG308_IPL_OPT_DUMP    = 0x20,
153 };
154
155 enum diag308_flags {
156         DIAG308_FLAGS_LP_VALID  = 0x80,
157 };
158
159 enum diag308_vm_flags {
160         DIAG308_VM_FLAGS_NSS_VALID      = 0x80,
161         DIAG308_VM_FLAGS_VP_VALID       = 0x40,
162 };
163
164 enum diag308_rc {
165         DIAG308_RC_OK           = 0x0001,
166         DIAG308_RC_NOCONFIG     = 0x0102,
167 };
168
169 extern int diag308(unsigned long subcode, void *addr);
170 extern void diag308_reset(void);
171 extern void store_status(void);
172
173 #endif /* _ASM_S390_IPL_H */