[S390] zfcpdump support.
[linux-2.6.git] / include / asm-s390 / 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 struct ipl_block_ccw {
60         u8  load_param[8];
61         u8  reserved1[84];
62         u8  reserved2[2];
63         u16 devno;
64         u8  vm_flags;
65         u8  reserved3[3];
66         u32 vm_parm_len;
67         u8  reserved4[80];
68 } __attribute__((packed));
69
70 struct ipl_parameter_block {
71         struct ipl_list_hdr hdr;
72         union {
73                 struct ipl_block_fcp fcp;
74                 struct ipl_block_ccw ccw;
75         } ipl_info;
76 } __attribute__((packed));
77
78 /*
79  * IPL validity flags
80  */
81 extern u32 ipl_flags;
82
83 extern u32 dump_prefix_page;
84
85 extern void do_reipl(void);
86 extern void ipl_save_parameters(void);
87
88 enum {
89         IPL_DEVNO_VALID         = 1,
90         IPL_PARMBLOCK_VALID     = 2,
91         IPL_NSS_VALID           = 4,
92 };
93
94 enum ipl_type {
95         IPL_TYPE_UNKNOWN        = 1,
96         IPL_TYPE_CCW            = 2,
97         IPL_TYPE_FCP            = 4,
98         IPL_TYPE_FCP_DUMP       = 8,
99         IPL_TYPE_NSS            = 16,
100 };
101
102 struct ipl_info
103 {
104         enum ipl_type type;
105         union {
106                 struct {
107                         struct ccw_dev_id dev_id;
108                 } ccw;
109                 struct {
110                         struct ccw_dev_id dev_id;
111                         u64 wwpn;
112                         u64 lun;
113                 } fcp;
114                 struct {
115                         char name[NSS_NAME_SIZE + 1];
116                 } nss;
117         } data;
118 };
119
120 extern struct ipl_info ipl_info;
121 extern void setup_ipl_info(void);
122
123 /*
124  * DIAG 308 support
125  */
126 enum diag308_subcode  {
127         DIAG308_REL_HSA = 2,
128         DIAG308_IPL     = 3,
129         DIAG308_DUMP    = 4,
130         DIAG308_SET     = 5,
131         DIAG308_STORE   = 6,
132 };
133
134 enum diag308_ipl_type {
135         DIAG308_IPL_TYPE_FCP    = 0,
136         DIAG308_IPL_TYPE_CCW    = 2,
137 };
138
139 enum diag308_opt {
140         DIAG308_IPL_OPT_IPL     = 0x10,
141         DIAG308_IPL_OPT_DUMP    = 0x20,
142 };
143
144 enum diag308_rc {
145         DIAG308_RC_OK   = 1,
146 };
147
148 extern int diag308(unsigned long subcode, void *addr);
149
150 #endif /* _ASM_S390_IPL_H */