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/arch/s390/include/asm/ipl.h

https://bitbucket.org/ndreys/linux-sunxi
C++ Header | 171 lines | 132 code | 28 blank | 11 comment | 0 complexity | a6d4d453d62d3d186b1df2fa46fa9cd2 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
  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
 32struct 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
 42struct 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
 63struct 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
 76struct 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 */
 87extern u32 ipl_flags;
 88extern u32 dump_prefix_page;
 89extern unsigned int zfcpdump_prefix_array[];
 90
 91extern void do_reipl(void);
 92extern void do_halt(void);
 93extern void do_poff(void);
 94extern void ipl_save_parameters(void);
 95extern void ipl_update_parameters(void);
 96extern size_t append_ipl_vmparm(char *, size_t);
 97extern size_t append_ipl_scpdata(char *, size_t);
 98
 99enum {
100	IPL_DEVNO_VALID		= 1,
101	IPL_PARMBLOCK_VALID	= 2,
102	IPL_NSS_VALID		= 4,
103};
104
105enum 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
113struct 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
131extern struct ipl_info ipl_info;
132extern void setup_ipl(void);
133
134/*
135 * DIAG 308 support
136 */
137enum 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
145enum diag308_ipl_type {
146	DIAG308_IPL_TYPE_FCP	= 0,
147	DIAG308_IPL_TYPE_CCW	= 2,
148};
149
150enum diag308_opt {
151	DIAG308_IPL_OPT_IPL	= 0x10,
152	DIAG308_IPL_OPT_DUMP	= 0x20,
153};
154
155enum diag308_flags {
156	DIAG308_FLAGS_LP_VALID	= 0x80,
157};
158
159enum diag308_vm_flags {
160	DIAG308_VM_FLAGS_NSS_VALID	= 0x80,
161	DIAG308_VM_FLAGS_VP_VALID	= 0x40,
162};
163
164enum diag308_rc {
165	DIAG308_RC_OK		= 0x0001,
166	DIAG308_RC_NOCONFIG	= 0x0102,
167};
168
169extern int diag308(unsigned long subcode, void *addr);
170
171#endif /* _ASM_S390_IPL_H */