tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
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/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
33struct 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
44struct 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
65struct 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
78struct 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 */
89extern u32 ipl_flags;
90
91struct save_area;
92struct save_area * __init save_area_alloc(bool is_boot_cpu);
93struct save_area * __init save_area_boot_cpu(void);
94void __init save_area_add_regs(struct save_area *, void *regs);
95void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
96
97extern void do_reipl(void);
98extern void do_halt(void);
99extern void do_poff(void);
100extern void ipl_verify_parameters(void);
101extern void ipl_update_parameters(void);
102extern size_t append_ipl_vmparm(char *, size_t);
103extern size_t append_ipl_scpdata(char *, size_t);
104
105enum {
106 IPL_DEVNO_VALID = 1,
107 IPL_PARMBLOCK_VALID = 2,
108 IPL_NSS_VALID = 4,
109};
110
111enum 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
119struct 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
137extern struct ipl_info ipl_info;
138extern void setup_ipl(void);
139
140/*
141 * DIAG 308 support
142 */
143enum 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
151enum diag308_ipl_type {
152 DIAG308_IPL_TYPE_FCP = 0,
153 DIAG308_IPL_TYPE_CCW = 2,
154};
155
156enum diag308_opt {
157 DIAG308_IPL_OPT_IPL = 0x10,
158 DIAG308_IPL_OPT_DUMP = 0x20,
159};
160
161enum diag308_flags {
162 DIAG308_FLAGS_LP_VALID = 0x80,
163};
164
165enum diag308_vm_flags {
166 DIAG308_VM_FLAGS_NSS_VALID = 0x80,
167 DIAG308_VM_FLAGS_VP_VALID = 0x40,
168};
169
170enum diag308_rc {
171 DIAG308_RC_OK = 0x0001,
172 DIAG308_RC_NOCONFIG = 0x0102,
173};
174
175extern int diag308(unsigned long subcode, void *addr);
176extern void diag308_reset(void);
177extern void store_status(void (*fn)(void *), void *data);
178extern void lgr_info_log(void);
179
180#endif /* _ASM_S390_IPL_H */