xref: /openbmc/linux/arch/s390/include/asm/ipl.h (revision 726bd223)
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/lowcore.h>
11 #include <asm/types.h>
12 #include <asm/cio.h>
13 #include <asm/setup.h>
14 
15 #define IPL_PARMBLOCK_ORIGIN	0x2000
16 
17 #define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
18 			      sizeof(struct ipl_block_fcp))
19 
20 #define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 16)
21 
22 #define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
23 			      sizeof(struct ipl_block_ccw))
24 
25 #define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 16)
26 
27 #define IPL_MAX_SUPPORTED_VERSION (0)
28 
29 #define IPL_PARMBLOCK_START	((struct ipl_parameter_block *) \
30 				 IPL_PARMBLOCK_ORIGIN)
31 #define IPL_PARMBLOCK_SIZE	(IPL_PARMBLOCK_START->hdr.len)
32 
33 struct ipl_list_hdr {
34 	u32 len;
35 	u8  reserved1[3];
36 	u8  version;
37 	u32 blk0_len;
38 	u8  pbt;
39 	u8  flags;
40 	u16 reserved2;
41 	u8  loadparm[8];
42 } __attribute__((packed));
43 
44 struct ipl_block_fcp {
45 	u8  reserved1[305-1];
46 	u8  opt;
47 	u8  reserved2[3];
48 	u16 reserved3;
49 	u16 devno;
50 	u8  reserved4[4];
51 	u64 wwpn;
52 	u64 lun;
53 	u32 bootprog;
54 	u8  reserved5[12];
55 	u64 br_lba;
56 	u32 scp_data_len;
57 	u8  reserved6[260];
58 	u8  scp_data[];
59 } __attribute__((packed));
60 
61 #define DIAG308_VMPARM_SIZE	64
62 #define DIAG308_SCPDATA_SIZE	(PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
63 				 offsetof(struct ipl_block_fcp, scp_data)))
64 
65 struct ipl_block_ccw {
66 	u8  reserved1[84];
67 	u16 reserved2 : 13;
68 	u8  ssid : 3;
69 	u16 devno;
70 	u8  vm_flags;
71 	u8  reserved3[3];
72 	u32 vm_parm_len;
73 	u8  nss_name[8];
74 	u8  vm_parm[DIAG308_VMPARM_SIZE];
75 	u8  reserved4[8];
76 } __attribute__((packed));
77 
78 struct ipl_parameter_block {
79 	struct ipl_list_hdr hdr;
80 	union {
81 		struct ipl_block_fcp fcp;
82 		struct ipl_block_ccw ccw;
83 	} ipl_info;
84 } __attribute__((packed,aligned(4096)));
85 
86 /*
87  * IPL validity flags
88  */
89 extern u32 ipl_flags;
90 
91 struct save_area;
92 struct save_area * __init save_area_alloc(bool is_boot_cpu);
93 struct save_area * __init save_area_boot_cpu(void);
94 void __init save_area_add_regs(struct save_area *, void *regs);
95 void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
96 
97 extern void do_reipl(void);
98 extern void do_halt(void);
99 extern void do_poff(void);
100 extern void ipl_verify_parameters(void);
101 extern void ipl_update_parameters(void);
102 extern size_t append_ipl_vmparm(char *, size_t);
103 extern size_t append_ipl_scpdata(char *, size_t);
104 
105 enum {
106 	IPL_DEVNO_VALID		= 1,
107 	IPL_PARMBLOCK_VALID	= 2,
108 	IPL_NSS_VALID		= 4,
109 };
110 
111 enum ipl_type {
112 	IPL_TYPE_UNKNOWN	= 1,
113 	IPL_TYPE_CCW		= 2,
114 	IPL_TYPE_FCP		= 4,
115 	IPL_TYPE_FCP_DUMP	= 8,
116 	IPL_TYPE_NSS		= 16,
117 };
118 
119 struct ipl_info
120 {
121 	enum ipl_type type;
122 	union {
123 		struct {
124 			struct ccw_dev_id dev_id;
125 		} ccw;
126 		struct {
127 			struct ccw_dev_id dev_id;
128 			u64 wwpn;
129 			u64 lun;
130 		} fcp;
131 		struct {
132 			char name[NSS_NAME_SIZE + 1];
133 		} nss;
134 	} data;
135 };
136 
137 extern struct ipl_info ipl_info;
138 extern void setup_ipl(void);
139 
140 /*
141  * DIAG 308 support
142  */
143 enum diag308_subcode  {
144 	DIAG308_REL_HSA = 2,
145 	DIAG308_LOAD_CLEAR = 3,
146 	DIAG308_LOAD_NORMAL_DUMP = 4,
147 	DIAG308_SET = 5,
148 	DIAG308_STORE = 6,
149 };
150 
151 enum diag308_ipl_type {
152 	DIAG308_IPL_TYPE_FCP	= 0,
153 	DIAG308_IPL_TYPE_CCW	= 2,
154 };
155 
156 enum diag308_opt {
157 	DIAG308_IPL_OPT_IPL	= 0x10,
158 	DIAG308_IPL_OPT_DUMP	= 0x20,
159 };
160 
161 enum diag308_flags {
162 	DIAG308_FLAGS_LP_VALID	= 0x80,
163 };
164 
165 enum diag308_vm_flags {
166 	DIAG308_VM_FLAGS_NSS_VALID	= 0x80,
167 	DIAG308_VM_FLAGS_VP_VALID	= 0x40,
168 };
169 
170 enum diag308_rc {
171 	DIAG308_RC_OK		= 0x0001,
172 	DIAG308_RC_NOCONFIG	= 0x0102,
173 };
174 
175 extern int diag308(unsigned long subcode, void *addr);
176 extern void diag308_reset(void);
177 extern void store_status(void (*fn)(void *), void *data);
178 extern void lgr_info_log(void);
179 
180 #endif /* _ASM_S390_IPL_H */
181