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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * s390 (re)ipl support
4 *
5 * Copyright IBM Corp. 2007
6 */
7
8#ifndef _ASM_S390_IPL_H
9#define _ASM_S390_IPL_H
10
11#include <asm/lowcore.h>
12#include <asm/types.h>
13#include <asm/cio.h>
14#include <asm/setup.h>
15
16#define NSS_NAME_SIZE 8
17
18#define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
19 sizeof(struct ipl_block_fcp))
20
21#define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 16)
22
23#define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
24 sizeof(struct ipl_block_ccw))
25
26#define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 16)
27
28#define IPL_MAX_SUPPORTED_VERSION (0)
29
30struct ipl_list_hdr {
31 u32 len;
32 u8 reserved1[3];
33 u8 version;
34 u32 blk0_len;
35 u8 pbt;
36 u8 flags;
37 u16 reserved2;
38 u8 loadparm[8];
39} __attribute__((packed));
40
41struct ipl_block_fcp {
42 u8 reserved1[305-1];
43 u8 opt;
44 u8 reserved2[3];
45 u16 reserved3;
46 u16 devno;
47 u8 reserved4[4];
48 u64 wwpn;
49 u64 lun;
50 u32 bootprog;
51 u8 reserved5[12];
52 u64 br_lba;
53 u32 scp_data_len;
54 u8 reserved6[260];
55 u8 scp_data[];
56} __attribute__((packed));
57
58#define DIAG308_VMPARM_SIZE 64
59#define DIAG308_SCPDATA_SIZE (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
60 offsetof(struct ipl_block_fcp, scp_data)))
61
62struct ipl_block_ccw {
63 u8 reserved1[84];
64 u16 reserved2 : 13;
65 u8 ssid : 3;
66 u16 devno;
67 u8 vm_flags;
68 u8 reserved3[3];
69 u32 vm_parm_len;
70 u8 nss_name[8];
71 u8 vm_parm[DIAG308_VMPARM_SIZE];
72 u8 reserved4[8];
73} __attribute__((packed));
74
75struct ipl_parameter_block {
76 struct ipl_list_hdr hdr;
77 union {
78 struct ipl_block_fcp fcp;
79 struct ipl_block_ccw ccw;
80 char raw[PAGE_SIZE - sizeof(struct ipl_list_hdr)];
81 } ipl_info;
82} __packed __aligned(PAGE_SIZE);
83
84struct save_area;
85struct save_area * __init save_area_alloc(bool is_boot_cpu);
86struct save_area * __init save_area_boot_cpu(void);
87void __init save_area_add_regs(struct save_area *, void *regs);
88void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
89
90extern void s390_reset_system(void);
91extern void ipl_store_parameters(void);
92extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
93 const struct ipl_parameter_block *ipb);
94
95enum ipl_type {
96 IPL_TYPE_UNKNOWN = 1,
97 IPL_TYPE_CCW = 2,
98 IPL_TYPE_FCP = 4,
99 IPL_TYPE_FCP_DUMP = 8,
100 IPL_TYPE_NSS = 16,
101};
102
103struct ipl_info
104{
105 enum ipl_type type;
106 union {
107 struct {
108 struct ccw_dev_id dev_id;
109 } ccw;
110 struct {
111 struct ccw_dev_id dev_id;
112 u64 wwpn;
113 u64 lun;
114 } fcp;
115 struct {
116 char name[NSS_NAME_SIZE + 1];
117 } nss;
118 } data;
119};
120
121extern struct ipl_info ipl_info;
122extern void setup_ipl(void);
123extern void set_os_info_reipl_block(void);
124
125/*
126 * DIAG 308 support
127 */
128enum diag308_subcode {
129 DIAG308_REL_HSA = 2,
130 DIAG308_LOAD_CLEAR = 3,
131 DIAG308_LOAD_NORMAL_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_vm_flags {
151 DIAG308_VM_FLAGS_NSS_VALID = 0x80,
152 DIAG308_VM_FLAGS_VP_VALID = 0x40,
153};
154
155enum diag308_rc {
156 DIAG308_RC_OK = 0x0001,
157 DIAG308_RC_NOCONFIG = 0x0102,
158};
159
160extern int diag308(unsigned long subcode, void *addr);
161extern void diag308_reset(void);
162extern void store_status(void (*fn)(void *), void *data);
163extern void lgr_info_log(void);
164
165#endif /* _ASM_S390_IPL_H */