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
  61 struct ipl_block_ccw {
  62         u8  load_parm[8];
  63         u8  reserved1[84];
  64         u8  reserved2[2];
  65         u16 devno;
  66         u8  vm_flags;
  67         u8  reserved3[3];
  68         u32 vm_parm_len;
  69         u8  nss_name[8];
  70         u8  vm_parm[DIAG308_VMPARM_SIZE];
  71         u8  reserved4[8];
  72 } __attribute__((packed));
  73
  74 struct ipl_parameter_block {
  75         struct ipl_list_hdr hdr;
  76         union {
  77                 struct ipl_block_fcp fcp;
  78                 struct ipl_block_ccw ccw;
  79         } ipl_info;
  80 } __attribute__((packed,aligned(4096)));
  81
  82 /*
  83  * IPL validity flags
  84  */
  85 extern u32 ipl_flags;
  86 extern u32 dump_prefix_page;
  87 extern unsigned int zfcpdump_prefix_array[];
  88
  89 extern void do_reipl(void);
  90 extern void do_halt(void);
  91 extern void do_poff(void);
  92 extern void ipl_save_parameters(void);
  93 extern void ipl_update_parameters(void);
  94 extern void get_ipl_vmparm(char *);
  95
  96 enum {
  97         IPL_DEVNO_VALID         = 1,
  98         IPL_PARMBLOCK_VALID     = 2,
  99         IPL_NSS_VALID           = 4,
 100 };
 101
 102 enum ipl_type {
 103         IPL_TYPE_UNKNOWN        = 1,
 104         IPL_TYPE_CCW            = 2,
 105         IPL_TYPE_FCP            = 4,
 106         IPL_TYPE_FCP_DUMP       = 8,
 107         IPL_TYPE_NSS            = 16,
 108 };
 109
 110 struct ipl_info
 111 {
 112         enum ipl_type type;
 113         union {
 114                 struct {
 115                         struct ccw_dev_id dev_id;
 116                 } ccw;
 117                 struct {
 118                         struct ccw_dev_id dev_id;
 119                         u64 wwpn;
 120                         u64 lun;
 121                 } fcp;
 122                 struct {
 123                         char name[NSS_NAME_SIZE + 1];
 124                 } nss;
 125         } data;
 126 };
 127
 128 extern struct ipl_info ipl_info;
 129 extern void setup_ipl(void);
 130
 131 /*
 132  * DIAG 308 support
 133  */
 134 enum diag308_subcode  {
 135         DIAG308_REL_HSA = 2,
 136         DIAG308_IPL     = 3,
 137         DIAG308_DUMP    = 4,
 138         DIAG308_SET     = 5,
 139         DIAG308_STORE   = 6,
 140 };
 141
 142 enum diag308_ipl_type {
 143         DIAG308_IPL_TYPE_FCP    = 0,
 144         DIAG308_IPL_TYPE_CCW    = 2,
 145 };
 146
 147 enum diag308_opt {
 148         DIAG308_IPL_OPT_IPL     = 0x10,
 149         DIAG308_IPL_OPT_DUMP    = 0x20,
 150 };
 151
 152 enum diag308_flags {
 153         DIAG308_FLAGS_LP_VALID  = 0x80,
 154 };
 155
 156 enum diag308_vm_flags {
 157         DIAG308_VM_FLAGS_NSS_VALID      = 0x80,
 158         DIAG308_VM_FLAGS_VP_VALID       = 0x40,
 159 };
 160
 161 enum diag308_rc {
 162         DIAG308_RC_OK           = 0x0001,
 163         DIAG308_RC_NOCONFIG     = 0x0102,
 164 };
 165
 166 extern int diag308(unsigned long subcode, void *addr);
 167
 168 #endif /* _ASM_S390_IPL_H */