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Linux kernel mirror (for testing)
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linux
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
32struct 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
42struct 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
59struct 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
70struct 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 */
81extern u32 ipl_flags;
82extern u32 dump_prefix_page;
83extern unsigned int zfcpdump_prefix_array[];
84
85extern void do_reipl(void);
86extern void do_halt(void);
87extern void do_poff(void);
88extern void ipl_save_parameters(void);
89
90enum {
91 IPL_DEVNO_VALID = 1,
92 IPL_PARMBLOCK_VALID = 2,
93 IPL_NSS_VALID = 4,
94};
95
96enum ipl_type {
97 IPL_TYPE_UNKNOWN = 1,
98 IPL_TYPE_CCW = 2,
99 IPL_TYPE_FCP = 4,
100 IPL_TYPE_FCP_DUMP = 8,
101 IPL_TYPE_NSS = 16,
102};
103
104struct ipl_info
105{
106 enum ipl_type type;
107 union {
108 struct {
109 struct ccw_dev_id dev_id;
110 } ccw;
111 struct {
112 struct ccw_dev_id dev_id;
113 u64 wwpn;
114 u64 lun;
115 } fcp;
116 struct {
117 char name[NSS_NAME_SIZE + 1];
118 } nss;
119 } data;
120};
121
122extern struct ipl_info ipl_info;
123extern void setup_ipl(void);
124
125/*
126 * DIAG 308 support
127 */
128enum diag308_subcode {
129 DIAG308_REL_HSA = 2,
130 DIAG308_IPL = 3,
131 DIAG308_DUMP = 4,
132 DIAG308_SET = 5,
133 DIAG308_STORE = 6,
134};
135
136enum diag308_ipl_type {
137 DIAG308_IPL_TYPE_FCP = 0,
138 DIAG308_IPL_TYPE_CCW = 2,
139};
140
141enum diag308_opt {
142 DIAG308_IPL_OPT_IPL = 0x10,
143 DIAG308_IPL_OPT_DUMP = 0x20,
144};
145
146enum diag308_flags {
147 DIAG308_FLAGS_LP_VALID = 0x80,
148};
149
150enum diag308_rc {
151 DIAG308_RC_OK = 1,
152};
153
154extern int diag308(unsigned long subcode, void *addr);
155
156#endif /* _ASM_S390_IPL_H */