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	u8  reserved2[2];
68	u16 devno;
69	u8  vm_flags;
70	u8  reserved3[3];
71	u32 vm_parm_len;
72	u8  nss_name[8];
73	u8  vm_parm[DIAG308_VMPARM_SIZE];
74	u8  reserved4[8];
75} __attribute__((packed));
76
77struct ipl_parameter_block {
78	struct ipl_list_hdr hdr;
79	union {
80		struct ipl_block_fcp fcp;
81		struct ipl_block_ccw ccw;
82	} ipl_info;
83} __attribute__((packed,aligned(4096)));
84
85/*
86 * IPL validity flags
87 */
88extern u32 ipl_flags;
89extern u32 dump_prefix_page;
90
91struct dump_save_areas {
92	struct save_area_ext **areas;
93	int count;
94};
95
96extern struct dump_save_areas dump_save_areas;
97struct save_area_ext *dump_save_area_create(int cpu);
98
99extern void do_reipl(void);
100extern void do_halt(void);
101extern void do_poff(void);
102extern void ipl_save_parameters(void);
103extern void ipl_update_parameters(void);
104extern size_t append_ipl_vmparm(char *, size_t);
105extern size_t append_ipl_scpdata(char *, size_t);
106
107enum {
108	IPL_DEVNO_VALID		= 1,
109	IPL_PARMBLOCK_VALID	= 2,
110	IPL_NSS_VALID		= 4,
111};
112
113enum ipl_type {
114	IPL_TYPE_UNKNOWN	= 1,
115	IPL_TYPE_CCW		= 2,
116	IPL_TYPE_FCP		= 4,
117	IPL_TYPE_FCP_DUMP	= 8,
118	IPL_TYPE_NSS		= 16,
119};
120
121struct ipl_info
122{
123	enum ipl_type type;
124	union {
125		struct {
126			struct ccw_dev_id dev_id;
127		} ccw;
128		struct {
129			struct ccw_dev_id dev_id;
130			u64 wwpn;
131			u64 lun;
132		} fcp;
133		struct {
134			char name[NSS_NAME_SIZE + 1];
135		} nss;
136	} data;
137};
138
139extern struct ipl_info ipl_info;
140extern void setup_ipl(void);
141
142/*
143 * DIAG 308 support
144 */
145enum diag308_subcode  {
146	DIAG308_REL_HSA	= 2,
147	DIAG308_IPL	= 3,
148	DIAG308_DUMP	= 4,
149	DIAG308_SET	= 5,
150	DIAG308_STORE	= 6,
151};
152
153enum diag308_ipl_type {
154	DIAG308_IPL_TYPE_FCP	= 0,
155	DIAG308_IPL_TYPE_CCW	= 2,
156};
157
158enum diag308_opt {
159	DIAG308_IPL_OPT_IPL	= 0x10,
160	DIAG308_IPL_OPT_DUMP	= 0x20,
161};
162
163enum diag308_flags {
164	DIAG308_FLAGS_LP_VALID	= 0x80,
165};
166
167enum diag308_vm_flags {
168	DIAG308_VM_FLAGS_NSS_VALID	= 0x80,
169	DIAG308_VM_FLAGS_VP_VALID	= 0x40,
170};
171
172enum diag308_rc {
173	DIAG308_RC_OK		= 0x0001,
174	DIAG308_RC_NOCONFIG	= 0x0102,
175};
176
177extern int diag308(unsigned long subcode, void *addr);
178extern void diag308_reset(void);
179extern void store_status(void);
180extern void lgr_info_log(void);
181
182#endif /* _ASM_S390_IPL_H */
183