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

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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_PARMBLOCK_ORIGIN    0x2000
 19 
 20 #define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
 21                               sizeof(struct ipl_block_fcp))
 22 
 23 #define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 16)
 24 
 25 #define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
 26                               sizeof(struct ipl_block_ccw))
 27 
 28 #define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 16)
 29 
 30 #define IPL_MAX_SUPPORTED_VERSION (0)
 31 
 32 #define IPL_PARMBLOCK_START     ((struct ipl_parameter_block *) \
 33                                  IPL_PARMBLOCK_ORIGIN)
 34 #define IPL_PARMBLOCK_SIZE      (IPL_PARMBLOCK_START->hdr.len)
 35 
 36 struct ipl_list_hdr {
 37         u32 len;
 38         u8  reserved1[3];
 39         u8  version;
 40         u32 blk0_len;
 41         u8  pbt;
 42         u8  flags;
 43         u16 reserved2;
 44         u8  loadparm[8];
 45 } __attribute__((packed));
 46 
 47 struct ipl_block_fcp {
 48         u8  reserved1[305-1];
 49         u8  opt;
 50         u8  reserved2[3];
 51         u16 reserved3;
 52         u16 devno;
 53         u8  reserved4[4];
 54         u64 wwpn;
 55         u64 lun;
 56         u32 bootprog;
 57         u8  reserved5[12];
 58         u64 br_lba;
 59         u32 scp_data_len;
 60         u8  reserved6[260];
 61         u8  scp_data[];
 62 } __attribute__((packed));
 63 
 64 #define DIAG308_VMPARM_SIZE     64
 65 #define DIAG308_SCPDATA_SIZE    (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
 66                                  offsetof(struct ipl_block_fcp, scp_data)))
 67 
 68 struct ipl_block_ccw {
 69         u8  reserved1[84];
 70         u16 reserved2 : 13;
 71         u8  ssid : 3;
 72         u16 devno;
 73         u8  vm_flags;
 74         u8  reserved3[3];
 75         u32 vm_parm_len;
 76         u8  nss_name[8];
 77         u8  vm_parm[DIAG308_VMPARM_SIZE];
 78         u8  reserved4[8];
 79 } __attribute__((packed));
 80 
 81 struct ipl_parameter_block {
 82         struct ipl_list_hdr hdr;
 83         union {
 84                 struct ipl_block_fcp fcp;
 85                 struct ipl_block_ccw ccw;
 86         } ipl_info;
 87 } __packed __aligned(PAGE_SIZE);
 88 
 89 /*
 90  * IPL validity flags
 91  */
 92 extern u32 ipl_flags;
 93 
 94 struct save_area;
 95 struct save_area * __init save_area_alloc(bool is_boot_cpu);
 96 struct save_area * __init save_area_boot_cpu(void);
 97 void __init save_area_add_regs(struct save_area *, void *regs);
 98 void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
 99 
100 extern void do_reipl(void);
101 extern void do_halt(void);
102 extern void do_poff(void);
103 extern void ipl_verify_parameters(void);
104 extern void ipl_update_parameters(void);
105 extern size_t append_ipl_vmparm(char *, size_t);
106 extern size_t append_ipl_scpdata(char *, size_t);
107 
108 enum {
109         IPL_DEVNO_VALID         = 1,
110         IPL_PARMBLOCK_VALID     = 2,
111 };
112 
113 enum 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 
121 struct 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 
139 extern struct ipl_info ipl_info;
140 extern void setup_ipl(void);
141 
142 /*
143  * DIAG 308 support
144  */
145 enum diag308_subcode  {
146         DIAG308_REL_HSA = 2,
147         DIAG308_LOAD_CLEAR = 3,
148         DIAG308_LOAD_NORMAL_DUMP = 4,
149         DIAG308_SET = 5,
150         DIAG308_STORE = 6,
151 };
152 
153 enum diag308_ipl_type {
154         DIAG308_IPL_TYPE_FCP    = 0,
155         DIAG308_IPL_TYPE_CCW    = 2,
156 };
157 
158 enum diag308_opt {
159         DIAG308_IPL_OPT_IPL     = 0x10,
160         DIAG308_IPL_OPT_DUMP    = 0x20,
161 };
162 
163 enum diag308_flags {
164         DIAG308_FLAGS_LP_VALID  = 0x80,
165 };
166 
167 enum diag308_vm_flags {
168         DIAG308_VM_FLAGS_NSS_VALID      = 0x80,
169         DIAG308_VM_FLAGS_VP_VALID       = 0x40,
170 };
171 
172 enum diag308_rc {
173         DIAG308_RC_OK           = 0x0001,
174         DIAG308_RC_NOCONFIG     = 0x0102,
175 };
176 
177 extern int diag308(unsigned long subcode, void *addr);
178 extern void diag308_reset(void);
179 extern void store_status(void (*fn)(void *), void *data);
180 extern void lgr_info_log(void);
181 
182 #endif /* _ASM_S390_IPL_H */
183 

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