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   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 struct ipl_block_ccw {
  60         u8  load_param[8];
  61         u8  reserved1[84];
  62         u8  reserved2[2];
  63         u16 devno;
  64         u8  vm_flags;
  65         u8  reserved3[3];
  66         u32 vm_parm_len;
  67         u8  reserved4[80];
  68 } __attribute__((packed));
  69
  70 struct ipl_parameter_block {
  71         struct ipl_list_hdr hdr;
  72         union {
  73                 struct ipl_block_fcp fcp;
  74                 struct ipl_block_ccw ccw;
  75         } ipl_info;
  76 } __attribute__((packed));
  77
  78 /*
  79  * IPL validity flags
  80  */
  81 extern u32 ipl_flags;
  82 extern u32 dump_prefix_page;
  83 extern unsigned int zfcpdump_prefix_array[];
  84
  85 extern void do_reipl(void);
  86 extern void do_halt(void);
  87 extern void do_poff(void);
  88 extern void ipl_save_parameters(void);
  89
  90 enum {
  91         IPL_DEVNO_VALID         = 1,
  92         IPL_PARMBLOCK_VALID     = 2,
  93         IPL_NSS_VALID           = 4,
  94 };
  95
  96 enum ipl_type {
  97         IPL_TYPE_UNKNOWN        = 1,
  98         IPL_TYPE_CCW            = 2,
  99         IPL_TYPE_FCP            = 4,
 100         IPL_TYPE_FCP_DUMP       = 8,
 101         IPL_TYPE_NSS            = 16,
 102 };
 103
 104 struct ipl_info
 105 {
 106         enum ipl_type type;
 107         union {
 108                 struct {
 109                         struct ccw_dev_id dev_id;
 110                 } ccw;
 111                 struct {
 112                         struct ccw_dev_id dev_id;
 113                         u64 wwpn;
 114                         u64 lun;
 115                 } fcp;
 116                 struct {
 117                         char name[NSS_NAME_SIZE + 1];
 118                 } nss;
 119         } data;
 120 };
 121
 122 extern struct ipl_info ipl_info;
 123 extern void setup_ipl(void);
 124
 125 /*
 126  * DIAG 308 support
 127  */
 128 enum diag308_subcode  {
 129         DIAG308_REL_HSA = 2,
 130         DIAG308_IPL     = 3,
 131         DIAG308_DUMP    = 4,
 132         DIAG308_SET     = 5,
 133         DIAG308_STORE   = 6,
 134 };
 135
 136 enum diag308_ipl_type {
 137         DIAG308_IPL_TYPE_FCP    = 0,
 138         DIAG308_IPL_TYPE_CCW    = 2,
 139 };
 140
 141 enum diag308_opt {
 142         DIAG308_IPL_OPT_IPL     = 0x10,
 143         DIAG308_IPL_OPT_DUMP    = 0x20,
 144 };
 145
 146 enum diag308_flags {
 147         DIAG308_FLAGS_LP_VALID  = 0x80,
 148 };
 149
 150 enum diag308_rc {
 151         DIAG308_RC_OK   = 1,
 152 };
 153
 154 extern int diag308(unsigned long subcode, void *addr);
 155
 156 #endif /* _ASM_S390_IPL_H */