LXR linux/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/lowcore.h>
  11#include <asm/types.h>
  12#include <asm/cio.h>
  13#include <asm/setup.h>
  14
  15#define IPL_PARMBLOCK_ORIGIN    0x2000
  16
  17#define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
  18                              sizeof(struct ipl_block_fcp))
  19
  20#define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 16)
  21
  22#define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
  23                              sizeof(struct ipl_block_ccw))
  24
  25#define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 16)
  26
  27#define IPL_MAX_SUPPORTED_VERSION (0)
  28
  29#define IPL_PARMBLOCK_START     ((struct ipl_parameter_block *) \
  30                                 IPL_PARMBLOCK_ORIGIN)
  31#define IPL_PARMBLOCK_SIZE      (IPL_PARMBLOCK_START->hdr.len)
  32
  33struct ipl_list_hdr {
  34        u32 len;
  35        u8  reserved1[3];
  36        u8  version;
  37        u32 blk0_len;
  38        u8  pbt;
  39        u8  flags;
  40        u16 reserved2;
  41        u8  loadparm[8];
  42} __attribute__((packed));
  43
  44struct ipl_block_fcp {
  45        u8  reserved1[305-1];
  46        u8  opt;
  47        u8  reserved2[3];
  48        u16 reserved3;
  49        u16 devno;
  50        u8  reserved4[4];
  51        u64 wwpn;
  52        u64 lun;
  53        u32 bootprog;
  54        u8  reserved5[12];
  55        u64 br_lba;
  56        u32 scp_data_len;
  57        u8  reserved6[260];
  58        u8  scp_data[];
  59} __attribute__((packed));
  60
  61#define DIAG308_VMPARM_SIZE     64
  62#define DIAG308_SCPDATA_SIZE    (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
  63                                 offsetof(struct ipl_block_fcp, scp_data)))
  64
  65struct ipl_block_ccw {
  66        u8  reserved1[84];
  67        u8  reserved2[2];
  68        u16 devno;
  69        u8  vm_flags;
  70        u8  reserved3[3];
  71        u32 vm_parm_len;
  72        u8  nss_name[8];
  73        u8  vm_parm[DIAG308_VMPARM_SIZE];
  74        u8  reserved4[8];
  75} __attribute__((packed));
  76
  77struct ipl_parameter_block {
  78        struct ipl_list_hdr hdr;
  79        union {
  80                struct ipl_block_fcp fcp;
  81                struct ipl_block_ccw ccw;
  82        } ipl_info;
  83} __attribute__((packed,aligned(4096)));
  84
  85/*
  86 * IPL validity flags
  87 */
  88extern u32 ipl_flags;
  89extern u32 dump_prefix_page;
  90
  91struct dump_save_areas {
  92        struct save_area_ext **areas;
  93        int count;
  94};
  95
  96extern struct dump_save_areas dump_save_areas;
  97
  98extern void do_reipl(void);
  99extern void do_halt(void);
 100extern void do_poff(void);
 101extern void ipl_save_parameters(void);
 102extern void ipl_update_parameters(void);
 103extern size_t append_ipl_vmparm(char *, size_t);
 104extern size_t append_ipl_scpdata(char *, size_t);
 105
 106enum {
 107        IPL_DEVNO_VALID         = 1,
 108        IPL_PARMBLOCK_VALID     = 2,
 109        IPL_NSS_VALID           = 4,
 110};
 111
 112enum ipl_type {
 113        IPL_TYPE_UNKNOWN        = 1,
 114        IPL_TYPE_CCW            = 2,
 115        IPL_TYPE_FCP            = 4,
 116        IPL_TYPE_FCP_DUMP       = 8,
 117        IPL_TYPE_NSS            = 16,
 118};
 119
 120struct ipl_info
 121{
 122        enum ipl_type type;
 123        union {
 124                struct {
 125                        struct ccw_dev_id dev_id;
 126                } ccw;
 127                struct {
 128                        struct ccw_dev_id dev_id;
 129                        u64 wwpn;
 130                        u64 lun;
 131                } fcp;
 132                struct {
 133                        char name[NSS_NAME_SIZE + 1];
 134                } nss;
 135        } data;
 136};
 137
 138extern struct ipl_info ipl_info;
 139extern void setup_ipl(void);
 140
 141/*
 142 * DIAG 308 support
 143 */
 144enum diag308_subcode  {
 145        DIAG308_REL_HSA = 2,
 146        DIAG308_IPL     = 3,
 147        DIAG308_DUMP    = 4,
 148        DIAG308_SET     = 5,
 149        DIAG308_STORE   = 6,
 150};
 151
 152enum diag308_ipl_type {
 153        DIAG308_IPL_TYPE_FCP    = 0,
 154        DIAG308_IPL_TYPE_CCW    = 2,
 155};
 156
 157enum diag308_opt {
 158        DIAG308_IPL_OPT_IPL     = 0x10,
 159        DIAG308_IPL_OPT_DUMP    = 0x20,
 160};
 161
 162enum diag308_flags {
 163        DIAG308_FLAGS_LP_VALID  = 0x80,
 164};
 165
 166enum diag308_vm_flags {
 167        DIAG308_VM_FLAGS_NSS_VALID      = 0x80,
 168        DIAG308_VM_FLAGS_VP_VALID       = 0x40,
 169};
 170
 171enum diag308_rc {
 172        DIAG308_RC_OK           = 0x0001,
 173        DIAG308_RC_NOCONFIG     = 0x0102,
 174};
 175
 176extern int diag308(unsigned long subcode, void *addr);
 177extern void diag308_reset(void);
 178extern void store_status(void);
 179extern void lgr_info_log(void);
 180
 181#endif /* _ASM_S390_IPL_H */
 182