[PATCH] s390: spin lock retry
[linux-2.6.git] / include / asm-s390 / lowcore.h
1 /*
2  *  include/asm-s390/lowcore.h
3  *
4  *  S390 version
5  *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6  *    Author(s): Hartmut Penner (hp@de.ibm.com),
7  *               Martin Schwidefsky (schwidefsky@de.ibm.com),
8  *               Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
9  */
10
11 #ifndef _ASM_S390_LOWCORE_H
12 #define _ASM_S390_LOWCORE_H
13
14 #ifndef __s390x__
15 #define __LC_EXT_OLD_PSW                0x018
16 #define __LC_SVC_OLD_PSW                0x020
17 #define __LC_PGM_OLD_PSW                0x028
18 #define __LC_MCK_OLD_PSW                0x030
19 #define __LC_IO_OLD_PSW                 0x038
20 #define __LC_EXT_NEW_PSW                0x058
21 #define __LC_SVC_NEW_PSW                0x060
22 #define __LC_PGM_NEW_PSW                0x068
23 #define __LC_MCK_NEW_PSW                0x070
24 #define __LC_IO_NEW_PSW                 0x078
25 #else /* !__s390x__ */
26 #define __LC_EXT_OLD_PSW                0x0130
27 #define __LC_SVC_OLD_PSW                0x0140
28 #define __LC_PGM_OLD_PSW                0x0150
29 #define __LC_MCK_OLD_PSW                0x0160
30 #define __LC_IO_OLD_PSW                 0x0170
31 #define __LC_EXT_NEW_PSW                0x01b0
32 #define __LC_SVC_NEW_PSW                0x01c0
33 #define __LC_PGM_NEW_PSW                0x01d0
34 #define __LC_MCK_NEW_PSW                0x01e0
35 #define __LC_IO_NEW_PSW                 0x01f0
36 #endif /* !__s390x__ */
37
38 #define __LC_EXT_PARAMS                 0x080
39 #define __LC_CPU_ADDRESS                0x084
40 #define __LC_EXT_INT_CODE               0x086
41
42 #define __LC_SVC_ILC                    0x088
43 #define __LC_SVC_INT_CODE               0x08A
44 #define __LC_PGM_ILC                    0x08C
45 #define __LC_PGM_INT_CODE               0x08E
46
47 #define __LC_PER_ATMID                  0x096
48 #define __LC_PER_ADDRESS                0x098
49 #define __LC_PER_ACCESS_ID              0x0A1
50
51 #define __LC_SUBCHANNEL_ID              0x0B8
52 #define __LC_SUBCHANNEL_NR              0x0BA
53 #define __LC_IO_INT_PARM                0x0BC
54 #define __LC_IO_INT_WORD                0x0C0
55 #define __LC_MCCK_CODE                  0x0E8
56
57 #define __LC_RETURN_PSW                 0x200
58
59 #define __LC_SAVE_AREA                  0xC00
60
61 #ifndef __s390x__
62 #define __LC_IRB                        0x208
63 #define __LC_SYNC_ENTER_TIMER           0x248
64 #define __LC_ASYNC_ENTER_TIMER          0x250
65 #define __LC_EXIT_TIMER                 0x258
66 #define __LC_LAST_UPDATE_TIMER          0x260
67 #define __LC_USER_TIMER                 0x268
68 #define __LC_SYSTEM_TIMER               0x270
69 #define __LC_LAST_UPDATE_CLOCK          0x278
70 #define __LC_STEAL_CLOCK                0x280
71 #define __LC_KERNEL_STACK               0xC40
72 #define __LC_THREAD_INFO                0xC44
73 #define __LC_ASYNC_STACK                0xC48
74 #define __LC_KERNEL_ASCE                0xC4C
75 #define __LC_USER_ASCE                  0xC50
76 #define __LC_PANIC_STACK                0xC54
77 #define __LC_CPUID                      0xC60
78 #define __LC_CPUADDR                    0xC68
79 #define __LC_IPLDEV                     0xC7C
80 #define __LC_JIFFY_TIMER                0xC80
81 #define __LC_CURRENT                    0xC90
82 #define __LC_INT_CLOCK                  0xC98
83 #else /* __s390x__ */
84 #define __LC_IRB                        0x210
85 #define __LC_SYNC_ENTER_TIMER           0x250
86 #define __LC_ASYNC_ENTER_TIMER          0x258
87 #define __LC_EXIT_TIMER                 0x260
88 #define __LC_LAST_UPDATE_TIMER          0x268
89 #define __LC_USER_TIMER                 0x270
90 #define __LC_SYSTEM_TIMER               0x278
91 #define __LC_LAST_UPDATE_CLOCK          0x280
92 #define __LC_STEAL_CLOCK                0x288
93 #define __LC_KERNEL_STACK               0xD40
94 #define __LC_THREAD_INFO                0xD48
95 #define __LC_ASYNC_STACK                0xD50
96 #define __LC_KERNEL_ASCE                0xD58
97 #define __LC_USER_ASCE                  0xD60
98 #define __LC_PANIC_STACK                0xD68
99 #define __LC_CPUID                      0xD90
100 #define __LC_CPUADDR                    0xD98
101 #define __LC_IPLDEV                     0xDB8
102 #define __LC_JIFFY_TIMER                0xDC0
103 #define __LC_CURRENT                    0xDD8
104 #define __LC_INT_CLOCK                  0xDE8
105 #endif /* __s390x__ */
106
107 #define __LC_PANIC_MAGIC                0xE00
108
109 #ifndef __s390x__
110 #define __LC_PFAULT_INTPARM             0x080
111 #define __LC_CPU_TIMER_SAVE_AREA        0x0D8
112 #define __LC_AREGS_SAVE_AREA            0x120
113 #define __LC_GPREGS_SAVE_AREA           0x180
114 #define __LC_CREGS_SAVE_AREA            0x1C0
115 #else /* __s390x__ */
116 #define __LC_PFAULT_INTPARM             0x11B8
117 #define __LC_GPREGS_SAVE_AREA           0x1280
118 #define __LC_CPU_TIMER_SAVE_AREA        0x1328
119 #define __LC_AREGS_SAVE_AREA            0x1340
120 #define __LC_CREGS_SAVE_AREA            0x1380
121 #endif /* __s390x__ */
122
123 #ifndef __ASSEMBLY__
124
125 #include <linux/config.h>
126 #include <asm/processor.h>
127 #include <linux/types.h>
128 #include <asm/sigp.h>
129
130 void restart_int_handler(void);
131 void ext_int_handler(void);
132 void system_call(void);
133 void pgm_check_handler(void);
134 void mcck_int_handler(void);
135 void io_int_handler(void);
136
137 struct _lowcore
138 {
139 #ifndef __s390x__
140         /* prefix area: defined by architecture */
141         psw_t        restart_psw;              /* 0x000 */
142         __u32        ccw2[4];                  /* 0x008 */
143         psw_t        external_old_psw;         /* 0x018 */
144         psw_t        svc_old_psw;              /* 0x020 */
145         psw_t        program_old_psw;          /* 0x028 */
146         psw_t        mcck_old_psw;             /* 0x030 */
147         psw_t        io_old_psw;               /* 0x038 */
148         __u8         pad1[0x58-0x40];          /* 0x040 */
149         psw_t        external_new_psw;         /* 0x058 */
150         psw_t        svc_new_psw;              /* 0x060 */
151         psw_t        program_new_psw;          /* 0x068 */
152         psw_t        mcck_new_psw;             /* 0x070 */
153         psw_t        io_new_psw;               /* 0x078 */
154         __u32        ext_params;               /* 0x080 */
155         __u16        cpu_addr;                 /* 0x084 */
156         __u16        ext_int_code;             /* 0x086 */
157         __u16        svc_ilc;                  /* 0x088 */
158         __u16        svc_code;                 /* 0x08a */
159         __u16        pgm_ilc;                  /* 0x08c */
160         __u16        pgm_code;                 /* 0x08e */
161         __u32        trans_exc_code;           /* 0x090 */
162         __u16        mon_class_num;            /* 0x094 */
163         __u16        per_perc_atmid;           /* 0x096 */
164         __u32        per_address;              /* 0x098 */
165         __u32        monitor_code;             /* 0x09c */
166         __u8         exc_access_id;            /* 0x0a0 */
167         __u8         per_access_id;            /* 0x0a1 */
168         __u8         pad2[0xB8-0xA2];          /* 0x0a2 */
169         __u16        subchannel_id;            /* 0x0b8 */
170         __u16        subchannel_nr;            /* 0x0ba */
171         __u32        io_int_parm;              /* 0x0bc */
172         __u32        io_int_word;              /* 0x0c0 */
173         __u8         pad3[0xD4-0xC4];          /* 0x0c4 */
174         __u32        extended_save_area_addr;  /* 0x0d4 */
175         __u32        cpu_timer_save_area[2];   /* 0x0d8 */
176         __u32        clock_comp_save_area[2];  /* 0x0e0 */
177         __u32        mcck_interruption_code[2]; /* 0x0e8 */
178         __u8         pad4[0xf4-0xf0];          /* 0x0f0 */
179         __u32        external_damage_code;     /* 0x0f4 */
180         __u32        failing_storage_address;  /* 0x0f8 */
181         __u8         pad5[0x100-0xfc];         /* 0x0fc */
182         __u32        st_status_fixed_logout[4];/* 0x100 */
183         __u8         pad6[0x120-0x110];        /* 0x110 */
184         __u32        access_regs_save_area[16];/* 0x120 */
185         __u32        floating_pt_save_area[8]; /* 0x160 */
186         __u32        gpregs_save_area[16];     /* 0x180 */
187         __u32        cregs_save_area[16];      /* 0x1c0 */      
188
189         psw_t        return_psw;               /* 0x200 */
190         __u8         irb[64];                  /* 0x208 */
191         __u64        sync_enter_timer;         /* 0x248 */
192         __u64        async_enter_timer;        /* 0x250 */
193         __u64        exit_timer;               /* 0x258 */
194         __u64        last_update_timer;        /* 0x260 */
195         __u64        user_timer;               /* 0x268 */
196         __u64        system_timer;             /* 0x270 */
197         __u64        last_update_clock;        /* 0x278 */
198         __u64        steal_clock;              /* 0x280 */
199         __u8         pad8[0xc00-0x288];        /* 0x288 */
200
201         /* System info area */
202         __u32        save_area[16];            /* 0xc00 */
203         __u32        kernel_stack;             /* 0xc40 */
204         __u32        thread_info;              /* 0xc44 */
205         __u32        async_stack;              /* 0xc48 */
206         __u32        kernel_asce;              /* 0xc4c */
207         __u32        user_asce;                /* 0xc50 */
208         __u32        panic_stack;              /* 0xc54 */
209         __u8         pad10[0xc60-0xc58];       /* 0xc58 */
210         /* entry.S sensitive area start */
211         struct       cpuinfo_S390 cpu_data;    /* 0xc60 */
212         __u32        ipl_device;               /* 0xc7c */
213         /* entry.S sensitive area end */
214
215         /* SMP info area: defined by DJB */
216         __u64        jiffy_timer;              /* 0xc80 */
217         __u32        ext_call_fast;            /* 0xc88 */
218         __u32        percpu_offset;            /* 0xc8c */
219         __u32        current_task;             /* 0xc90 */
220         __u32        softirq_pending;          /* 0xc94 */
221         __u64        int_clock;                /* 0xc98 */
222         __u8         pad11[0xe00-0xca0];       /* 0xca0 */
223
224         /* 0xe00 is used as indicator for dump tools */
225         /* whether the kernel died with panic() or not */
226         __u32        panic_magic;              /* 0xe00 */
227
228         /* Align to the top 1k of prefix area */
229         __u8         pad12[0x1000-0xe04];      /* 0xe04 */
230 #else /* !__s390x__ */
231         /* prefix area: defined by architecture */
232         __u32        ccw1[2];                  /* 0x000 */
233         __u32        ccw2[4];                  /* 0x008 */
234         __u8         pad1[0x80-0x18];          /* 0x018 */
235         __u32        ext_params;               /* 0x080 */
236         __u16        cpu_addr;                 /* 0x084 */
237         __u16        ext_int_code;             /* 0x086 */
238         __u16        svc_ilc;                  /* 0x088 */
239         __u16        svc_code;                 /* 0x08a */
240         __u16        pgm_ilc;                  /* 0x08c */
241         __u16        pgm_code;                 /* 0x08e */
242         __u32        data_exc_code;            /* 0x090 */
243         __u16        mon_class_num;            /* 0x094 */
244         __u16        per_perc_atmid;           /* 0x096 */
245         addr_t       per_address;              /* 0x098 */
246         __u8         exc_access_id;            /* 0x0a0 */
247         __u8         per_access_id;            /* 0x0a1 */
248         __u8         op_access_id;             /* 0x0a2 */
249         __u8         ar_access_id;             /* 0x0a3 */
250         __u8         pad2[0xA8-0xA4];          /* 0x0a4 */
251         addr_t       trans_exc_code;           /* 0x0A0 */
252         addr_t       monitor_code;             /* 0x09c */
253         __u16        subchannel_id;            /* 0x0b8 */
254         __u16        subchannel_nr;            /* 0x0ba */
255         __u32        io_int_parm;              /* 0x0bc */
256         __u32        io_int_word;              /* 0x0c0 */
257         __u8         pad3[0xc8-0xc4];          /* 0x0c4 */
258         __u32        stfl_fac_list;            /* 0x0c8 */
259         __u8         pad4[0xe8-0xcc];          /* 0x0cc */
260         __u32        mcck_interruption_code[2]; /* 0x0e8 */
261         __u8         pad5[0xf4-0xf0];          /* 0x0f0 */
262         __u32        external_damage_code;     /* 0x0f4 */
263         addr_t       failing_storage_address;  /* 0x0f8 */
264         __u8         pad6[0x120-0x100];        /* 0x100 */
265         psw_t        restart_old_psw;          /* 0x120 */
266         psw_t        external_old_psw;         /* 0x130 */
267         psw_t        svc_old_psw;              /* 0x140 */
268         psw_t        program_old_psw;          /* 0x150 */
269         psw_t        mcck_old_psw;             /* 0x160 */
270         psw_t        io_old_psw;               /* 0x170 */
271         __u8         pad7[0x1a0-0x180];        /* 0x180 */
272         psw_t        restart_psw;              /* 0x1a0 */
273         psw_t        external_new_psw;         /* 0x1b0 */
274         psw_t        svc_new_psw;              /* 0x1c0 */
275         psw_t        program_new_psw;          /* 0x1d0 */
276         psw_t        mcck_new_psw;             /* 0x1e0 */
277         psw_t        io_new_psw;               /* 0x1f0 */
278         psw_t        return_psw;               /* 0x200 */
279         __u8         irb[64];                  /* 0x210 */
280         __u64        sync_enter_timer;         /* 0x250 */
281         __u64        async_enter_timer;        /* 0x258 */
282         __u64        exit_timer;               /* 0x260 */
283         __u64        last_update_timer;        /* 0x268 */
284         __u64        user_timer;               /* 0x270 */
285         __u64        system_timer;             /* 0x278 */
286         __u64        last_update_clock;        /* 0x280 */
287         __u64        steal_clock;              /* 0x288 */
288         __u8         pad8[0xc00-0x290];        /* 0x290 */
289         /* System info area */
290         __u64        save_area[16];            /* 0xc00 */
291         __u8         pad9[0xd40-0xc80];        /* 0xc80 */
292         __u64        kernel_stack;             /* 0xd40 */
293         __u64        thread_info;              /* 0xd48 */
294         __u64        async_stack;              /* 0xd50 */
295         __u64        kernel_asce;              /* 0xd58 */
296         __u64        user_asce;                /* 0xd60 */
297         __u64        panic_stack;              /* 0xd68 */
298         __u8         pad10[0xd80-0xd70];       /* 0xd70 */
299         /* entry.S sensitive area start */
300         struct       cpuinfo_S390 cpu_data;    /* 0xd80 */
301         __u32        ipl_device;               /* 0xdb8 */
302         __u32        pad11;                    /* 0xdbc */
303         /* entry.S sensitive area end */
304
305         /* SMP info area: defined by DJB */
306         __u64        jiffy_timer;              /* 0xdc0 */
307         __u64        ext_call_fast;            /* 0xdc8 */
308         __u64        percpu_offset;            /* 0xdd0 */
309         __u64        current_task;             /* 0xdd8 */
310         __u64        softirq_pending;          /* 0xde0 */
311         __u64        int_clock;                /* 0xde8 */
312         __u8         pad12[0xe00-0xdf0];       /* 0xdf0 */
313
314         /* 0xe00 is used as indicator for dump tools */
315         /* whether the kernel died with panic() or not */
316         __u32        panic_magic;              /* 0xe00 */
317
318         __u8         pad13[0x1200-0xe04];      /* 0xe04 */
319
320         /* System info area */ 
321
322         __u64        floating_pt_save_area[16]; /* 0x1200 */
323         __u64        gpregs_save_area[16];      /* 0x1280 */
324         __u32        st_status_fixed_logout[4]; /* 0x1300 */
325         __u8         pad14[0x1318-0x1310];      /* 0x1310 */
326         __u32        prefixreg_save_area;       /* 0x1318 */
327         __u32        fpt_creg_save_area;        /* 0x131c */
328         __u8         pad15[0x1324-0x1320];      /* 0x1320 */
329         __u32        tod_progreg_save_area;     /* 0x1324 */
330         __u32        cpu_timer_save_area[2];    /* 0x1328 */
331         __u32        clock_comp_save_area[2];   /* 0x1330 */
332         __u8         pad16[0x1340-0x1338];      /* 0x1338 */ 
333         __u32        access_regs_save_area[16]; /* 0x1340 */ 
334         __u64        cregs_save_area[16];       /* 0x1380 */
335
336         /* align to the top of the prefix area */
337
338         __u8         pad17[0x2000-0x1400];      /* 0x1400 */
339 #endif /* !__s390x__ */
340 } __attribute__((packed)); /* End structure*/
341
342 #define S390_lowcore (*((struct _lowcore *) 0))
343 extern struct _lowcore *lowcore_ptr[];
344
345 extern __inline__ void set_prefix(__u32 address)
346 {
347         __asm__ __volatile__ ("spx %0" : : "m" (address) : "memory" );
348 }
349
350 #define __PANIC_MAGIC           0xDEADC0DE
351
352 #endif
353
354 #endif