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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
59#define DIAG308_VMPARM_SIZE 64
60
61struct ipl_block_ccw {
62 u8 load_parm[8];
63 u8 reserved1[84];
64 u8 reserved2[2];
65 u16 devno;
66 u8 vm_flags;
67 u8 reserved3[3];
68 u32 vm_parm_len;
69 u8 nss_name[8];
70 u8 vm_parm[DIAG308_VMPARM_SIZE];
71 u8 reserved4[8];
72} __attribute__((packed));
73
74struct ipl_parameter_block {
75 struct ipl_list_hdr hdr;
76 union {
77 struct ipl_block_fcp fcp;
78 struct ipl_block_ccw ccw;
79 } ipl_info;
80} __attribute__((packed,aligned(4096)));
81
82/*
83 * IPL validity flags
84 */
85extern u32 ipl_flags;
86extern u32 dump_prefix_page;
87extern unsigned int zfcpdump_prefix_array[];
88
89extern void do_reipl(void);
90extern void do_halt(void);
91extern void do_poff(void);
92extern void ipl_save_parameters(void);
93extern void ipl_update_parameters(void);
94extern void get_ipl_vmparm(char *);
95
96enum {
97 IPL_DEVNO_VALID = 1,
98 IPL_PARMBLOCK_VALID = 2,
99 IPL_NSS_VALID = 4,
100};
101
102enum ipl_type {
103 IPL_TYPE_UNKNOWN = 1,
104 IPL_TYPE_CCW = 2,
105 IPL_TYPE_FCP = 4,
106 IPL_TYPE_FCP_DUMP = 8,
107 IPL_TYPE_NSS = 16,
108};
109
110struct ipl_info
111{
112 enum ipl_type type;
113 union {
114 struct {
115 struct ccw_dev_id dev_id;
116 } ccw;
117 struct {
118 struct ccw_dev_id dev_id;
119 u64 wwpn;
120 u64 lun;
121 } fcp;
122 struct {
123 char name[NSS_NAME_SIZE + 1];
124 } nss;
125 } data;
126};
127
128extern struct ipl_info ipl_info;
129extern void setup_ipl(void);
130
131/*
132 * DIAG 308 support
133 */
134enum diag308_subcode {
135 DIAG308_REL_HSA = 2,
136 DIAG308_IPL = 3,
137 DIAG308_DUMP = 4,
138 DIAG308_SET = 5,
139 DIAG308_STORE = 6,
140};
141
142enum diag308_ipl_type {
143 DIAG308_IPL_TYPE_FCP = 0,
144 DIAG308_IPL_TYPE_CCW = 2,
145};
146
147enum diag308_opt {
148 DIAG308_IPL_OPT_IPL = 0x10,
149 DIAG308_IPL_OPT_DUMP = 0x20,
150};
151
152enum diag308_flags {
153 DIAG308_FLAGS_LP_VALID = 0x80,
154};
155
156enum diag308_vm_flags {
157 DIAG308_VM_FLAGS_NSS_VALID = 0x80,
158 DIAG308_VM_FLAGS_VP_VALID = 0x40,
159};
160
161enum diag308_rc {
162 DIAG308_RC_OK = 0x0001,
163 DIAG308_RC_NOCONFIG = 0x0102,
164};
165
166extern int diag308(unsigned long subcode, void *addr);
167
168#endif /* _ASM_S390_IPL_H */