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 
171 #endif /* _ASM_S390_IPL_H */
172