include/asm-s390/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
  12 #define IPL_PARMBLOCK_ORIGIN    0x2000
  13
  14 #define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
  15                               sizeof(struct ipl_block_fcp))
  16
  17 #define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 8)
  18
  19 #define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
  20                               sizeof(struct ipl_block_ccw))
  21
  22 #define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 8)
  23
  24 #define IPL_MAX_SUPPORTED_VERSION (0)
  25
  26 #define IPL_PARMBLOCK_START     ((struct ipl_parameter_block *) \
  27                                  IPL_PARMBLOCK_ORIGIN)
  28 #define IPL_PARMBLOCK_SIZE      (IPL_PARMBLOCK_START->hdr.len)
  29
  30 struct ipl_list_hdr {
  31         u32 len;
  32         u8  reserved1[3];
  33         u8  version;
  34         u32 blk0_len;
  35         u8  pbt;
  36         u8  flags;
  37         u16 reserved2;
  38 } __attribute__((packed));
  39
  40 struct ipl_block_fcp {
  41         u8  reserved1[313-1];
  42         u8  opt;
  43         u8  reserved2[3];
  44         u16 reserved3;
  45         u16 devno;
  46         u8  reserved4[4];
  47         u64 wwpn;
  48         u64 lun;
  49         u32 bootprog;
  50         u8  reserved5[12];
  51         u64 br_lba;
  52         u32 scp_data_len;
  53         u8  reserved6[260];
  54         u8  scp_data[];
  55 } __attribute__((packed));
  56
  57 struct ipl_block_ccw {
  58         u8  load_param[8];
  59         u8  reserved1[84];
  60         u8  reserved2[2];
  61         u16 devno;
  62         u8  vm_flags;
  63         u8  reserved3[3];
  64         u32 vm_parm_len;
  65         u8  reserved4[80];
  66 } __attribute__((packed));
  67
  68 struct ipl_parameter_block {
  69         struct ipl_list_hdr hdr;
  70         union {
  71                 struct ipl_block_fcp fcp;
  72                 struct ipl_block_ccw ccw;
  73         } ipl_info;
  74 } __attribute__((packed));
  75
  76 /*
  77  * IPL validity flags
  78  */
  79 extern u32 ipl_flags;
  80
  81 extern u32 dump_prefix_page;
  82 extern void do_reipl(void);
  83 extern void ipl_save_parameters(void);
  84
  85 enum {
  86         IPL_DEVNO_VALID         = 1,
  87         IPL_PARMBLOCK_VALID     = 2,
  88         IPL_NSS_VALID           = 4,
  89 };
  90
  91 /*
  92  * DIAG 308 support
  93  */
  94 enum diag308_subcode  {
  95         DIAG308_REL_HSA = 2,
  96         DIAG308_IPL     = 3,
  97         DIAG308_DUMP    = 4,
  98         DIAG308_SET     = 5,
  99         DIAG308_STORE   = 6,
 100 };
 101
 102 enum diag308_ipl_type {
 103         DIAG308_IPL_TYPE_FCP    = 0,
 104         DIAG308_IPL_TYPE_CCW    = 2,
 105 };
 106
 107 enum diag308_opt {
 108         DIAG308_IPL_OPT_IPL     = 0x10,
 109         DIAG308_IPL_OPT_DUMP    = 0x20,
 110 };
 111
 112 enum diag308_rc {
 113         DIAG308_RC_OK   = 1,
 114 };
 115
 116 extern int diag308(unsigned long subcode, void *addr);
 117
 118 #endif /* _ASM_S390_IPL_H */