arch/s390/include/asm/ipl.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * s390 (re)ipl support
   4  *
   5  * Copyright IBM Corp. 2007
   6  */
   7
   8 #ifndef _ASM_S390_IPL_H
   9 #define _ASM_S390_IPL_H
  10
  11 #include <asm/lowcore.h>
  12 #include <asm/types.h>
  13 #include <asm/cio.h>
  14 #include <asm/setup.h>
  15
  16 #define NSS_NAME_SIZE   8
  17
  18 #define IPL_PARMBLOCK_ORIGIN    0x2000
  19
  20 #define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
  21                               sizeof(struct ipl_block_fcp))
  22
  23 #define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 16)
  24
  25 #define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
  26                               sizeof(struct ipl_block_ccw))
  27
  28 #define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 16)
  29
  30 #define IPL_MAX_SUPPORTED_VERSION (0)
  31
  32 #define IPL_PARMBLOCK_START     ((struct ipl_parameter_block *) \
  33                                  IPL_PARMBLOCK_ORIGIN)
  34 #define IPL_PARMBLOCK_SIZE      (IPL_PARMBLOCK_START->hdr.len)
  35
  36 struct ipl_list_hdr {
  37         u32 len;
  38         u8  reserved1[3];
  39         u8  version;
  40         u32 blk0_len;
  41         u8  pbt;
  42         u8  flags;
  43         u16 reserved2;
  44         u8  loadparm[8];
  45 } __attribute__((packed));
  46
  47 struct ipl_block_fcp {
  48         u8  reserved1[305-1];
  49         u8  opt;
  50         u8  reserved2[3];
  51         u16 reserved3;
  52         u16 devno;
  53         u8  reserved4[4];
  54         u64 wwpn;
  55         u64 lun;
  56         u32 bootprog;
  57         u8  reserved5[12];
  58         u64 br_lba;
  59         u32 scp_data_len;
  60         u8  reserved6[260];
  61         u8  scp_data[];
  62 } __attribute__((packed));
  63
  64 #define DIAG308_VMPARM_SIZE     64
  65 #define DIAG308_SCPDATA_SIZE    (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
  66                                  offsetof(struct ipl_block_fcp, scp_data)))
  67
  68 struct ipl_block_ccw {
  69         u8  reserved1[84];
  70         u16 reserved2 : 13;
  71         u8  ssid : 3;
  72         u16 devno;
  73         u8  vm_flags;
  74         u8  reserved3[3];
  75         u32 vm_parm_len;
  76         u8  nss_name[8];
  77         u8  vm_parm[DIAG308_VMPARM_SIZE];
  78         u8  reserved4[8];
  79 } __attribute__((packed));
  80
  81 struct ipl_parameter_block {
  82         struct ipl_list_hdr hdr;
  83         union {
  84                 struct ipl_block_fcp fcp;
  85                 struct ipl_block_ccw ccw;
  86         } ipl_info;
  87 } __packed __aligned(PAGE_SIZE);
  88
  89 /*
  90  * IPL validity flags
  91  */
  92 extern u32 ipl_flags;
  93
  94 struct save_area;
  95 struct save_area * __init save_area_alloc(bool is_boot_cpu);
  96 struct save_area * __init save_area_boot_cpu(void);
  97 void __init save_area_add_regs(struct save_area *, void *regs);
  98 void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
  99
 100 extern void do_reipl(void);
 101 extern void do_halt(void);
 102 extern void do_poff(void);
 103 extern void ipl_verify_parameters(void);
 104 extern void ipl_update_parameters(void);
 105 extern size_t append_ipl_vmparm(char *, size_t);
 106 extern size_t append_ipl_scpdata(char *, size_t);
 107
 108 enum {
 109         IPL_DEVNO_VALID         = 1,
 110         IPL_PARMBLOCK_VALID     = 2,
 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_LOAD_CLEAR = 3,
 148         DIAG308_LOAD_NORMAL_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 (*fn)(void *), void *data);
 180 extern void lgr_info_log(void);
 181
 182 #endif /* _ASM_S390_IPL_H */