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/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
  32struct 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
  42struct 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#define DIAG308_SCPDATA_SIZE    (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
  61                                 offsetof(struct ipl_block_fcp, scp_data)))
  62
  63struct ipl_block_ccw {
  64        u8  load_parm[8];
  65        u8  reserved1[84];
  66        u8  reserved2[2];
  67        u16 devno;
  68        u8  vm_flags;
  69        u8  reserved3[3];
  70        u32 vm_parm_len;
  71        u8  nss_name[8];
  72        u8  vm_parm[DIAG308_VMPARM_SIZE];
  73        u8  reserved4[8];
  74} __attribute__((packed));
  75
  76struct ipl_parameter_block {
  77        struct ipl_list_hdr hdr;
  78        union {
  79                struct ipl_block_fcp fcp;
  80                struct ipl_block_ccw ccw;
  81        } ipl_info;
  82} __attribute__((packed,aligned(4096)));
  83
  84/*
  85 * IPL validity flags
  86 */
  87extern u32 ipl_flags;
  88extern u32 dump_prefix_page;
  89extern unsigned int zfcpdump_prefix_array[];
  90
  91extern void do_reipl(void);
  92extern void do_halt(void);
  93extern void do_poff(void);
  94extern void ipl_save_parameters(void);
  95extern void ipl_update_parameters(void);
  96extern size_t append_ipl_vmparm(char *, size_t);
  97extern size_t append_ipl_scpdata(char *, size_t);
  98
  99enum {
 100        IPL_DEVNO_VALID         = 1,
 101        IPL_PARMBLOCK_VALID     = 2,
 102        IPL_NSS_VALID           = 4,
 103};
 104
 105enum ipl_type {
 106        IPL_TYPE_UNKNOWN        = 1,
 107        IPL_TYPE_CCW            = 2,
 108        IPL_TYPE_FCP            = 4,
 109        IPL_TYPE_FCP_DUMP       = 8,
 110        IPL_TYPE_NSS            = 16,
 111};
 112
 113struct ipl_info
 114{
 115        enum ipl_type type;
 116        union {
 117                struct {
 118                        struct ccw_dev_id dev_id;
 119                } ccw;
 120                struct {
 121                        struct ccw_dev_id dev_id;
 122                        u64 wwpn;
 123                        u64 lun;
 124                } fcp;
 125                struct {
 126                        char name[NSS_NAME_SIZE + 1];
 127                } nss;
 128        } data;
 129};
 130
 131extern struct ipl_info ipl_info;
 132extern void setup_ipl(void);
 133
 134/*
 135 * DIAG 308 support
 136 */
 137enum diag308_subcode  {
 138        DIAG308_REL_HSA = 2,
 139        DIAG308_IPL     = 3,
 140        DIAG308_DUMP    = 4,
 141        DIAG308_SET     = 5,
 142        DIAG308_STORE   = 6,
 143};
 144
 145enum diag308_ipl_type {
 146        DIAG308_IPL_TYPE_FCP    = 0,
 147        DIAG308_IPL_TYPE_CCW    = 2,
 148};
 149
 150enum diag308_opt {
 151        DIAG308_IPL_OPT_IPL     = 0x10,
 152        DIAG308_IPL_OPT_DUMP    = 0x20,
 153};
 154
 155enum diag308_flags {
 156        DIAG308_FLAGS_LP_VALID  = 0x80,
 157};
 158
 159enum diag308_vm_flags {
 160        DIAG308_VM_FLAGS_NSS_VALID      = 0x80,
 161        DIAG308_VM_FLAGS_VP_VALID       = 0x40,
 162};
 163
 164enum diag308_rc {
 165        DIAG308_RC_OK           = 0x0001,
 166        DIAG308_RC_NOCONFIG     = 0x0102,
 167};
 168
 169extern int diag308(unsigned long subcode, void *addr);
 170extern void diag308_reset(void);
 171
 172#endif /* _ASM_S390_IPL_H */
 173