arch/s390/include/asm/lowcore.h

   1 /*
   2  *    Copyright IBM Corp. 1999,2010
   3  *    Author(s): Hartmut Penner <hp@de.ibm.com>,
   4  *               Martin Schwidefsky <schwidefsky@de.ibm.com>,
   5  *               Denis Joseph Barrow,
   6  */
   7
   8 #ifndef _ASM_S390_LOWCORE_H
   9 #define _ASM_S390_LOWCORE_H
  10
  11 #include <linux/types.h>
  12 #include <asm/ptrace.h>
  13 #include <asm/cpu.h>
  14
  15 void restart_int_handler(void);
  16 void ext_int_handler(void);
  17 void system_call(void);
  18 void pgm_check_handler(void);
  19 void mcck_int_handler(void);
  20 void io_int_handler(void);
  21
  22 #ifdef CONFIG_32BIT
  23
  24 #define LC_ORDER 0
  25 #define LC_PAGES 1
  26
  27 struct save_area {
  28         u32     ext_save;
  29         u64     timer;
  30         u64     clk_cmp;
  31         u8      pad1[24];
  32         u8      psw[8];
  33         u32     pref_reg;
  34         u8      pad2[20];
  35         u32     acc_regs[16];
  36         u64     fp_regs[4];
  37         u32     gp_regs[16];
  38         u32     ctrl_regs[16];
  39 } __packed;
  40
  41 struct _lowcore {
  42         psw_t   restart_psw;                    /* 0x0000 */
  43         psw_t   restart_old_psw;                /* 0x0008 */
  44         __u8    pad_0x0010[0x0014-0x0010];      /* 0x0010 */
  45         __u32   ipl_parmblock_ptr;              /* 0x0014 */
  46         psw_t   external_old_psw;               /* 0x0018 */
  47         psw_t   svc_old_psw;                    /* 0x0020 */
  48         psw_t   program_old_psw;                /* 0x0028 */
  49         psw_t   mcck_old_psw;                   /* 0x0030 */
  50         psw_t   io_old_psw;                     /* 0x0038 */
  51         __u8    pad_0x0040[0x0058-0x0040];      /* 0x0040 */
  52         psw_t   external_new_psw;               /* 0x0058 */
  53         psw_t   svc_new_psw;                    /* 0x0060 */
  54         psw_t   program_new_psw;                /* 0x0068 */
  55         psw_t   mcck_new_psw;                   /* 0x0070 */
  56         psw_t   io_new_psw;                     /* 0x0078 */
  57         __u32   ext_params;                     /* 0x0080 */
  58         __u16   cpu_addr;                       /* 0x0084 */
  59         __u16   ext_int_code;                   /* 0x0086 */
  60         __u16   svc_ilc;                        /* 0x0088 */
  61         __u16   svc_code;                       /* 0x008a */
  62         __u16   pgm_ilc;                        /* 0x008c */
  63         __u16   pgm_code;                       /* 0x008e */
  64         __u32   trans_exc_code;                 /* 0x0090 */
  65         __u16   mon_class_num;                  /* 0x0094 */
  66         __u16   per_perc_atmid;                 /* 0x0096 */
  67         __u32   per_address;                    /* 0x0098 */
  68         __u32   monitor_code;                   /* 0x009c */
  69         __u8    exc_access_id;                  /* 0x00a0 */
  70         __u8    per_access_id;                  /* 0x00a1 */
  71         __u8    op_access_id;                   /* 0x00a2 */
  72         __u8    ar_access_id;                   /* 0x00a3 */
  73         __u8    pad_0x00a4[0x00b8-0x00a4];      /* 0x00a4 */
  74         __u16   subchannel_id;                  /* 0x00b8 */
  75         __u16   subchannel_nr;                  /* 0x00ba */
  76         __u32   io_int_parm;                    /* 0x00bc */
  77         __u32   io_int_word;                    /* 0x00c0 */
  78         __u8    pad_0x00c4[0x00c8-0x00c4];      /* 0x00c4 */
  79         __u32   stfl_fac_list;                  /* 0x00c8 */
  80         __u8    pad_0x00cc[0x00d4-0x00cc];      /* 0x00cc */
  81         __u32   extended_save_area_addr;        /* 0x00d4 */
  82         __u32   cpu_timer_save_area[2];         /* 0x00d8 */
  83         __u32   clock_comp_save_area[2];        /* 0x00e0 */
  84         __u32   mcck_interruption_code[2];      /* 0x00e8 */
  85         __u8    pad_0x00f0[0x00f4-0x00f0];      /* 0x00f0 */
  86         __u32   external_damage_code;           /* 0x00f4 */
  87         __u32   failing_storage_address;        /* 0x00f8 */
  88         __u8    pad_0x00fc[0x0100-0x00fc];      /* 0x00fc */
  89         psw_t   psw_save_area;                  /* 0x0100 */
  90         __u32   prefixreg_save_area;            /* 0x0108 */
  91         __u8    pad_0x010c[0x0120-0x010c];      /* 0x010c */
  92
  93         /* CPU register save area: defined by architecture */
  94         __u32   access_regs_save_area[16];      /* 0x0120 */
  95         __u32   floating_pt_save_area[8];       /* 0x0160 */
  96         __u32   gpregs_save_area[16];           /* 0x0180 */
  97         __u32   cregs_save_area[16];            /* 0x01c0 */
  98
  99         /* Return psws. */
 100         __u32   save_area[16];                  /* 0x0200 */
 101         psw_t   return_psw;                     /* 0x0240 */
 102         psw_t   return_mcck_psw;                /* 0x0248 */
 103
 104         /* CPU time accounting values */
 105         __u64   sync_enter_timer;               /* 0x0250 */
 106         __u64   async_enter_timer;              /* 0x0258 */
 107         __u64   exit_timer;                     /* 0x0260 */
 108         __u64   user_timer;                     /* 0x0268 */
 109         __u64   system_timer;                   /* 0x0270 */
 110         __u64   steal_timer;                    /* 0x0278 */
 111         __u64   last_update_timer;              /* 0x0280 */
 112         __u64   last_update_clock;              /* 0x0288 */
 113
 114         /* Current process. */
 115         __u32   current_task;                   /* 0x0290 */
 116         __u32   thread_info;                    /* 0x0294 */
 117         __u32   kernel_stack;                   /* 0x0298 */
 118
 119         /* Interrupt and panic stack. */
 120         __u32   async_stack;                    /* 0x029c */
 121         __u32   panic_stack;                    /* 0x02a0 */
 122
 123         /* Address space pointer. */
 124         __u32   kernel_asce;                    /* 0x02a4 */
 125         __u32   user_asce;                      /* 0x02a8 */
 126         __u32   user_exec_asce;                 /* 0x02ac */
 127
 128         /* SMP info area */
 129         struct cpuid cpu_id;                    /* 0x02b0 */
 130         __u32   cpu_nr;                         /* 0x02b8 */
 131         __u32   softirq_pending;                /* 0x02bc */
 132         __u32   percpu_offset;                  /* 0x02c0 */
 133         __u32   ext_call_fast;                  /* 0x02c4 */
 134         __u64   int_clock;                      /* 0x02c8 */
 135         __u64   clock_comparator;               /* 0x02d0 */
 136         __u32   machine_flags;                  /* 0x02d8 */
 137         __u32   ftrace_func;                    /* 0x02dc */
 138         __u8    pad_0x02e0[0x0300-0x02e0];      /* 0x02e0 */
 139
 140         /* Interrupt response block */
 141         __u8    irb[64];                        /* 0x0300 */
 142
 143         __u8    pad_0x0340[0x0e00-0x0340];      /* 0x0340 */
 144
 145         /*
 146          * 0xe00 contains the address of the IPL Parameter Information
 147          * block. Dump tools need IPIB for IPL after dump.
 148          * Note: do not change the position of any fields in 0x0e00-0x0f00
 149          */
 150         __u32   ipib;                           /* 0x0e00 */
 151         __u32   ipib_checksum;                  /* 0x0e04 */
 152
 153         /* Align to the top 1k of prefix area */
 154         __u8    pad_0x0e08[0x1000-0x0e08];      /* 0x0e08 */
 155 } __packed;
 156
 157 #else /* CONFIG_32BIT */
 158
 159 #define LC_ORDER 1
 160 #define LC_PAGES 2
 161
 162 struct save_area {
 163         u64     fp_regs[16];
 164         u64     gp_regs[16];
 165         u8      psw[16];
 166         u8      pad1[8];
 167         u32     pref_reg;
 168         u32     fp_ctrl_reg;
 169         u8      pad2[4];
 170         u32     tod_reg;
 171         u64     timer;
 172         u64     clk_cmp;
 173         u8      pad3[8];
 174         u32     acc_regs[16];
 175         u64     ctrl_regs[16];
 176 } __packed;
 177
 178 struct _lowcore {
 179         __u8    pad_0x0000[0x0014-0x0000];      /* 0x0000 */
 180         __u32   ipl_parmblock_ptr;              /* 0x0014 */
 181         __u8    pad_0x0018[0x0080-0x0018];      /* 0x0018 */
 182         __u32   ext_params;                     /* 0x0080 */
 183         __u16   cpu_addr;                       /* 0x0084 */
 184         __u16   ext_int_code;                   /* 0x0086 */
 185         __u16   svc_ilc;                        /* 0x0088 */
 186         __u16   svc_code;                       /* 0x008a */
 187         __u16   pgm_ilc;                        /* 0x008c */
 188         __u16   pgm_code;                       /* 0x008e */
 189         __u32   data_exc_code;                  /* 0x0090 */
 190         __u16   mon_class_num;                  /* 0x0094 */
 191         __u16   per_perc_atmid;                 /* 0x0096 */
 192         addr_t  per_address;                    /* 0x0098 */
 193         __u8    exc_access_id;                  /* 0x00a0 */
 194         __u8    per_access_id;                  /* 0x00a1 */
 195         __u8    op_access_id;                   /* 0x00a2 */
 196         __u8    ar_access_id;                   /* 0x00a3 */
 197         __u8    pad_0x00a4[0x00a8-0x00a4];      /* 0x00a4 */
 198         addr_t  trans_exc_code;                 /* 0x00a8 */
 199         addr_t  monitor_code;                   /* 0x00b0 */
 200         __u16   subchannel_id;                  /* 0x00b8 */
 201         __u16   subchannel_nr;                  /* 0x00ba */
 202         __u32   io_int_parm;                    /* 0x00bc */
 203         __u32   io_int_word;                    /* 0x00c0 */
 204         __u8    pad_0x00c4[0x00c8-0x00c4];      /* 0x00c4 */
 205         __u32   stfl_fac_list;                  /* 0x00c8 */
 206         __u8    pad_0x00cc[0x00e8-0x00cc];      /* 0x00cc */
 207         __u32   mcck_interruption_code[2];      /* 0x00e8 */
 208         __u8    pad_0x00f0[0x00f4-0x00f0];      /* 0x00f0 */
 209         __u32   external_damage_code;           /* 0x00f4 */
 210         addr_t  failing_storage_address;        /* 0x00f8 */
 211         __u8    pad_0x0100[0x0110-0x0100];      /* 0x0100 */
 212         __u64   breaking_event_addr;            /* 0x0110 */
 213         __u8    pad_0x0118[0x0120-0x0118];      /* 0x0118 */
 214         psw_t   restart_old_psw;                /* 0x0120 */
 215         psw_t   external_old_psw;               /* 0x0130 */
 216         psw_t   svc_old_psw;                    /* 0x0140 */
 217         psw_t   program_old_psw;                /* 0x0150 */
 218         psw_t   mcck_old_psw;                   /* 0x0160 */
 219         psw_t   io_old_psw;                     /* 0x0170 */
 220         __u8    pad_0x0180[0x01a0-0x0180];      /* 0x0180 */
 221         psw_t   restart_psw;                    /* 0x01a0 */
 222         psw_t   external_new_psw;               /* 0x01b0 */
 223         psw_t   svc_new_psw;                    /* 0x01c0 */
 224         psw_t   program_new_psw;                /* 0x01d0 */
 225         psw_t   mcck_new_psw;                   /* 0x01e0 */
 226         psw_t   io_new_psw;                     /* 0x01f0 */
 227
 228         /* Entry/exit save area & return psws. */
 229         __u64   save_area[16];                  /* 0x0200 */
 230         psw_t   return_psw;                     /* 0x0280 */
 231         psw_t   return_mcck_psw;                /* 0x0290 */
 232
 233         /* CPU accounting and timing values. */
 234         __u64   sync_enter_timer;               /* 0x02a0 */
 235         __u64   async_enter_timer;              /* 0x02a8 */
 236         __u64   exit_timer;                     /* 0x02b0 */
 237         __u64   user_timer;                     /* 0x02b8 */
 238         __u64   system_timer;                   /* 0x02c0 */
 239         __u64   steal_timer;                    /* 0x02c8 */
 240         __u64   last_update_timer;              /* 0x02d0 */
 241         __u64   last_update_clock;              /* 0x02d8 */
 242
 243         /* Current process. */
 244         __u64   current_task;                   /* 0x02e0 */
 245         __u64   thread_info;                    /* 0x02e8 */
 246         __u64   kernel_stack;                   /* 0x02f0 */
 247
 248         /* Interrupt and panic stack. */
 249         __u64   async_stack;                    /* 0x02f8 */
 250         __u64   panic_stack;                    /* 0x0300 */
 251
 252         /* Address space pointer. */
 253         __u64   kernel_asce;                    /* 0x0308 */
 254         __u64   user_asce;                      /* 0x0310 */
 255         __u64   user_exec_asce;                 /* 0x0318 */
 256
 257         /* SMP info area */
 258         struct cpuid cpu_id;                    /* 0x0320 */
 259         __u32   cpu_nr;                         /* 0x0328 */
 260         __u32   softirq_pending;                /* 0x032c */
 261         __u64   percpu_offset;                  /* 0x0330 */
 262         __u64   ext_call_fast;                  /* 0x0338 */
 263         __u64   int_clock;                      /* 0x0340 */
 264         __u64   clock_comparator;               /* 0x0348 */
 265         __u64   vdso_per_cpu_data;              /* 0x0350 */
 266         __u64   machine_flags;                  /* 0x0358 */
 267         __u64   ftrace_func;                    /* 0x0360 */
 268         __u8    pad_0x0368[0x0380-0x0368];      /* 0x0368 */
 269
 270         /* Interrupt response block. */
 271         __u8    irb[64];                        /* 0x0380 */
 272
 273         /* Per cpu primary space access list */
 274         __u32   paste[16];                      /* 0x03c0 */
 275
 276         __u8    pad_0x0400[0x0e00-0x0400];      /* 0x0400 */
 277
 278         /*
 279          * 0xe00 contains the address of the IPL Parameter Information
 280          * block. Dump tools need IPIB for IPL after dump.
 281          * Note: do not change the position of any fields in 0x0e00-0x0f00
 282          */
 283         __u64   ipib;                           /* 0x0e00 */
 284         __u32   ipib_checksum;                  /* 0x0e08 */
 285         __u8    pad_0x0e0c[0x11b8-0x0e0c];      /* 0x0e0c */
 286
 287         /* 64 bit extparam used for pfault/diag 250: defined by architecture */
 288         __u64   ext_params2;                    /* 0x11B8 */
 289         __u8    pad_0x11c0[0x1200-0x11C0];      /* 0x11C0 */
 290
 291         /* CPU register save area: defined by architecture */
 292         __u64   floating_pt_save_area[16];      /* 0x1200 */
 293         __u64   gpregs_save_area[16];           /* 0x1280 */
 294         psw_t   psw_save_area;                  /* 0x1300 */
 295         __u8    pad_0x1310[0x1318-0x1310];      /* 0x1310 */
 296         __u32   prefixreg_save_area;            /* 0x1318 */
 297         __u32   fpt_creg_save_area;             /* 0x131c */
 298         __u8    pad_0x1320[0x1324-0x1320];      /* 0x1320 */
 299         __u32   tod_progreg_save_area;          /* 0x1324 */
 300         __u32   cpu_timer_save_area[2];         /* 0x1328 */
 301         __u32   clock_comp_save_area[2];        /* 0x1330 */
 302         __u8    pad_0x1338[0x1340-0x1338];      /* 0x1338 */
 303         __u32   access_regs_save_area[16];      /* 0x1340 */
 304         __u64   cregs_save_area[16];            /* 0x1380 */
 305
 306         /* align to the top of the prefix area */
 307         __u8    pad_0x1400[0x2000-0x1400];      /* 0x1400 */
 308 } __packed;
 309
 310 #endif /* CONFIG_32BIT */
 311
 312 #define S390_lowcore (*((struct _lowcore *) 0))
 313
 314 extern struct _lowcore *lowcore_ptr[];
 315
 316 static inline void set_prefix(__u32 address)
 317 {
 318         asm volatile("spx %0" : : "m" (address) : "memory");
 319 }
 320
 321 static inline __u32 store_prefix(void)
 322 {
 323         __u32 address;
 324
 325         asm volatile("stpx %0" : "=m" (address));
 326         return address;
 327 }
 328
 329 #endif /* _ASM_S390_LOWCORE_H */