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/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
  32 struct 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
  42 struct 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
  63 struct 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
  76 struct 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  */
  87 extern u32 ipl_flags;
  88 extern u32 dump_prefix_page;
  89 extern unsigned int zfcpdump_prefix_array[];
  90
  91 extern void do_reipl(void);
  92 extern void do_halt(void);
  93 extern void do_poff(void);
  94 extern void ipl_save_parameters(void);
  95 extern void ipl_update_parameters(void);
  96 extern size_t append_ipl_vmparm(char *, size_t);
  97 extern size_t append_ipl_scpdata(char *, size_t);
  98
  99 enum {
 100         IPL_DEVNO_VALID         = 1,
 101         IPL_PARMBLOCK_VALID     = 2,
 102         IPL_NSS_VALID           = 4,
 103 };
 104
 105 enum 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
 113 struct 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
 131 extern struct ipl_info ipl_info;
 132 extern void setup_ipl(void);
 133
 134 /*
 135  * DIAG 308 support
 136  */
 137 enum 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
 145 enum diag308_ipl_type {
 146         DIAG308_IPL_TYPE_FCP    = 0,
 147         DIAG308_IPL_TYPE_CCW    = 2,
 148 };
 149
 150 enum diag308_opt {
 151         DIAG308_IPL_OPT_IPL     = 0x10,
 152         DIAG308_IPL_OPT_DUMP    = 0x20,
 153 };
 154
 155 enum diag308_flags {
 156         DIAG308_FLAGS_LP_VALID  = 0x80,
 157 };
 158
 159 enum diag308_vm_flags {
 160         DIAG308_VM_FLAGS_NSS_VALID      = 0x80,
 161         DIAG308_VM_FLAGS_VP_VALID       = 0x40,
 162 };
 163
 164 enum diag308_rc {
 165         DIAG308_RC_OK           = 0x0001,
 166         DIAG308_RC_NOCONFIG     = 0x0102,
 167 };
 168
 169 extern int diag308(unsigned long subcode, void *addr);
 170 extern void diag308_reset(void);
 171 extern void store_status(void);
 172
 173 #endif /* _ASM_S390_IPL_H */