arch/s390/include/asm/ipl.h

   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 IPL_PARMBLOCK_ORIGIN    0x2000
  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
  30 #define IPL_PARMBLOCK_START     ((struct ipl_parameter_block *) \
  31                                  IPL_PARMBLOCK_ORIGIN)
  32 #define IPL_PARMBLOCK_SIZE      (IPL_PARMBLOCK_START->hdr.len)
  33
  34 struct ipl_list_hdr {
  35         u32 len;
  36         u8  reserved1[3];
  37         u8  version;
  38         u32 blk0_len;
  39         u8  pbt;
  40         u8  flags;
  41         u16 reserved2;
  42         u8  loadparm[8];
  43 } __attribute__((packed));
  44
  45 struct ipl_block_fcp {
  46         u8  reserved1[305-1];
  47         u8  opt;
  48         u8  reserved2[3];
  49         u16 reserved3;
  50         u16 devno;
  51         u8  reserved4[4];
  52         u64 wwpn;
  53         u64 lun;
  54         u32 bootprog;
  55         u8  reserved5[12];
  56         u64 br_lba;
  57         u32 scp_data_len;
  58         u8  reserved6[260];
  59         u8  scp_data[];
  60 } __attribute__((packed));
  61
  62 #define DIAG308_VMPARM_SIZE     64
  63 #define DIAG308_SCPDATA_SIZE    (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
  64                                  offsetof(struct ipl_block_fcp, scp_data)))
  65
  66 struct ipl_block_ccw {
  67         u8  reserved1[84];
  68         u16 reserved2 : 13;
  69         u8  ssid : 3;
  70         u16 devno;
  71         u8  vm_flags;
  72         u8  reserved3[3];
  73         u32 vm_parm_len;
  74         u8  nss_name[8];
  75         u8  vm_parm[DIAG308_VMPARM_SIZE];
  76         u8  reserved4[8];
  77 } __attribute__((packed));
  78
  79 struct ipl_parameter_block {
  80         struct ipl_list_hdr hdr;
  81         union {
  82                 struct ipl_block_fcp fcp;
  83                 struct ipl_block_ccw ccw;
  84         } ipl_info;
  85 } __packed __aligned(PAGE_SIZE);
  86
  87 /*
  88  * IPL validity flags
  89  */
  90 extern u32 ipl_flags;
  91
  92 struct save_area;
  93 struct save_area * __init save_area_alloc(bool is_boot_cpu);
  94 struct save_area * __init save_area_boot_cpu(void);
  95 void __init save_area_add_regs(struct save_area *, void *regs);
  96 void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
  97
  98 extern void do_reipl(void);
  99 extern void do_halt(void);
 100 extern void do_poff(void);
 101 extern void ipl_verify_parameters(void);
 102 extern void ipl_update_parameters(void);
 103 extern size_t append_ipl_vmparm(char *, size_t);
 104 extern size_t append_ipl_scpdata(char *, size_t);
 105
 106 enum {
 107         IPL_DEVNO_VALID         = 1,
 108         IPL_PARMBLOCK_VALID     = 2,
 109         IPL_NSS_VALID           = 4,
 110 };
 111
 112 enum ipl_type {
 113         IPL_TYPE_UNKNOWN        = 1,
 114         IPL_TYPE_CCW            = 2,
 115         IPL_TYPE_FCP            = 4,
 116         IPL_TYPE_FCP_DUMP       = 8,
 117         IPL_TYPE_NSS            = 16,
 118 };
 119
 120 struct ipl_info
 121 {
 122         enum ipl_type type;
 123         union {
 124                 struct {
 125                         struct ccw_dev_id dev_id;
 126                 } ccw;
 127                 struct {
 128                         struct ccw_dev_id dev_id;
 129                         u64 wwpn;
 130                         u64 lun;
 131                 } fcp;
 132                 struct {
 133                         char name[NSS_NAME_SIZE + 1];
 134                 } nss;
 135         } data;
 136 };
 137
 138 extern struct ipl_info ipl_info;
 139 extern void setup_ipl(void);
 140
 141 /*
 142  * DIAG 308 support
 143  */
 144 enum diag308_subcode  {
 145         DIAG308_REL_HSA = 2,
 146         DIAG308_LOAD_CLEAR = 3,
 147         DIAG308_LOAD_NORMAL_DUMP = 4,
 148         DIAG308_SET = 5,
 149         DIAG308_STORE = 6,
 150 };
 151
 152 enum diag308_ipl_type {
 153         DIAG308_IPL_TYPE_FCP    = 0,
 154         DIAG308_IPL_TYPE_CCW    = 2,
 155 };
 156
 157 enum diag308_opt {
 158         DIAG308_IPL_OPT_IPL     = 0x10,
 159         DIAG308_IPL_OPT_DUMP    = 0x20,
 160 };
 161
 162 enum diag308_flags {
 163         DIAG308_FLAGS_LP_VALID  = 0x80,
 164 };
 165
 166 enum diag308_vm_flags {
 167         DIAG308_VM_FLAGS_NSS_VALID      = 0x80,
 168         DIAG308_VM_FLAGS_VP_VALID       = 0x40,
 169 };
 170
 171 enum diag308_rc {
 172         DIAG308_RC_OK           = 0x0001,
 173         DIAG308_RC_NOCONFIG     = 0x0102,
 174 };
 175
 176 extern int diag308(unsigned long subcode, void *addr);
 177 extern void diag308_reset(void);
 178 extern void store_status(void (*fn)(void *), void *data);
 179 extern void lgr_info_log(void);
 180
 181 #endif /* _ASM_S390_IPL_H */