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

   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
  33 struct 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
  44 struct 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
  65 struct 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
  77 struct 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  */
  88 extern u32 ipl_flags;
  89 extern u32 dump_prefix_page;
  90
  91 struct dump_save_areas {
  92         struct save_area_ext **areas;
  93         int count;
  94 };
  95
  96 extern struct dump_save_areas dump_save_areas;
  97 struct save_area_ext *dump_save_area_create(int cpu);
  98
  99 extern void do_reipl(void);
 100 extern void do_halt(void);
 101 extern void do_poff(void);
 102 extern void ipl_save_parameters(void);
 103 extern void ipl_update_parameters(void);
 104 extern size_t append_ipl_vmparm(char *, size_t);
 105 extern size_t append_ipl_scpdata(char *, size_t);
 106
 107 enum {
 108         IPL_DEVNO_VALID         = 1,
 109         IPL_PARMBLOCK_VALID     = 2,
 110         IPL_NSS_VALID           = 4,
 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_IPL     = 3,
 148         DIAG308_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);
 180 extern void lgr_info_log(void);
 181
 182 #endif /* _ASM_S390_IPL_H */