1 /*
2  *  linux/include/asm/traps.h
3  *
4  *  Copyright (C) 1993        Hamish Macdonald
5  *
6  * This file is subject to the terms and conditions of the GNU General Public
7  * License.  See the file COPYING in the main directory of this archive
8  * for more details.
9  */
10 
11 #ifndef _M68K_TRAPS_H
12 #define _M68K_TRAPS_H
13 
14 #ifndef __ASSEMBLY__
15 
16 #include <linux/linkage.h>
17 #include <asm/ptrace.h>
18 
19 typedef void (*e_vector)(void);
20 extern e_vector vectors[];
21 extern e_vector *_ramvec;
22 
23 asmlinkage void auto_inthandler(void);
24 asmlinkage void user_inthandler(void);
25 asmlinkage void bad_inthandler(void);
26 
27 #endif
28 
29 #define VEC_RESETSP (0)
30 #define VEC_RESETPC (1)
31 #define VEC_BUSERR  (2)
32 #define VEC_ADDRERR (3)
33 #define VEC_ILLEGAL (4)
34 #define VEC_ZERODIV (5)
35 #define VEC_CHK     (6)
36 #define VEC_TRAP    (7)
37 #define VEC_PRIV    (8)
38 #define VEC_TRACE   (9)
39 #define VEC_LINE10  (10)
40 #define VEC_LINE11  (11)
41 #define VEC_RESV12  (12)
42 #define VEC_COPROC  (13)
43 #define VEC_FORMAT  (14)
44 #define VEC_UNINT   (15)
45 #define VEC_RESV16  (16)
46 #define VEC_RESV17  (17)
47 #define VEC_RESV18  (18)
48 #define VEC_RESV19  (19)
49 #define VEC_RESV20  (20)
50 #define VEC_RESV21  (21)
51 #define VEC_RESV22  (22)
52 #define VEC_RESV23  (23)
53 #define VEC_SPUR    (24)
54 #define VEC_INT1    (25)
55 #define VEC_INT2    (26)
56 #define VEC_INT3    (27)
57 #define VEC_INT4    (28)
58 #define VEC_INT5    (29)
59 #define VEC_INT6    (30)
60 #define VEC_INT7    (31)
61 #define VEC_SYS     (32)
62 #define VEC_TRAP1   (33)
63 #define VEC_TRAP2   (34)
64 #define VEC_TRAP3   (35)
65 #define VEC_TRAP4   (36)
66 #define VEC_TRAP5   (37)
67 #define VEC_TRAP6   (38)
68 #define VEC_TRAP7   (39)
69 #define VEC_TRAP8   (40)
70 #define VEC_TRAP9   (41)
71 #define VEC_TRAP10  (42)
72 #define VEC_TRAP11  (43)
73 #define VEC_TRAP12  (44)
74 #define VEC_TRAP13  (45)
75 #define VEC_TRAP14  (46)
76 #define VEC_TRAP15  (47)
77 #define VEC_FPBRUC  (48)
78 #define VEC_FPIR    (49)
79 #define VEC_FPDIVZ  (50)
80 #define VEC_FPUNDER (51)
81 #define VEC_FPOE    (52)
82 #define VEC_FPOVER  (53)
83 #define VEC_FPNAN   (54)
84 #define VEC_FPUNSUP (55)
85 #define VEC_MMUCFG  (56)
86 #define VEC_MMUILL  (57)
87 #define VEC_MMUACC  (58)
88 #define VEC_RESV59  (59)
89 #define	VEC_UNIMPEA (60)
90 #define	VEC_UNIMPII (61)
91 #define VEC_RESV62  (62)
92 #define VEC_RESV63  (63)
93 #define VEC_USER    (64)
94 
95 #define VECOFF(vec) ((vec)<<2)
96 
97 #ifndef __ASSEMBLY__
98 
99 /* Status register bits */
100 #define PS_T  (0x8000)
101 #define PS_S  (0x2000)
102 #define PS_M  (0x1000)
103 #define PS_C  (0x0001)
104 
105 /* bits for 68020/68030 special status word */
106 
107 #define FC    (0x8000)
108 #define FB    (0x4000)
109 #define RC    (0x2000)
110 #define RB    (0x1000)
111 #define DF    (0x0100)
112 #define RM    (0x0080)
113 #define RW    (0x0040)
114 #define SZ    (0x0030)
115 #define DFC   (0x0007)
116 
117 /* bits for 68030 MMU status register (mmusr,psr) */
118 
119 #define MMU_B	     (0x8000)    /* bus error */
120 #define MMU_L	     (0x4000)    /* limit violation */
121 #define MMU_S	     (0x2000)    /* supervisor violation */
122 #define MMU_WP	     (0x0800)    /* write-protected */
123 #define MMU_I	     (0x0400)    /* invalid descriptor */
124 #define MMU_M	     (0x0200)    /* ATC entry modified */
125 #define MMU_T	     (0x0040)    /* transparent translation */
126 #define MMU_NUM      (0x0007)    /* number of levels traversed */
127 
128 
129 /* bits for 68040 special status word */
130 #define CP_040	(0x8000)
131 #define CU_040	(0x4000)
132 #define CT_040	(0x2000)
133 #define CM_040	(0x1000)
134 #define MA_040	(0x0800)
135 #define ATC_040 (0x0400)
136 #define LK_040	(0x0200)
137 #define RW_040	(0x0100)
138 #define SIZ_040 (0x0060)
139 #define TT_040	(0x0018)
140 #define TM_040	(0x0007)
141 
142 /* bits for 68040 write back status word */
143 #define WBV_040   (0x80)
144 #define WBSIZ_040 (0x60)
145 #define WBBYT_040 (0x20)
146 #define WBWRD_040 (0x40)
147 #define WBLNG_040 (0x00)
148 #define WBTT_040  (0x18)
149 #define WBTM_040  (0x07)
150 
151 /* bus access size codes */
152 #define BA_SIZE_BYTE    (0x20)
153 #define BA_SIZE_WORD    (0x40)
154 #define BA_SIZE_LONG    (0x00)
155 #define BA_SIZE_LINE    (0x60)
156 
157 /* bus access transfer type codes */
158 #define BA_TT_MOVE16    (0x08)
159 
160 /* bits for 68040 MMU status register (mmusr) */
161 #define MMU_B_040   (0x0800)
162 #define MMU_G_040   (0x0400)
163 #define MMU_S_040   (0x0080)
164 #define MMU_CM_040  (0x0060)
165 #define MMU_M_040   (0x0010)
166 #define MMU_WP_040  (0x0004)
167 #define MMU_T_040   (0x0002)
168 #define MMU_R_040   (0x0001)
169 
170 /* bits in the 68060 fault status long word (FSLW) */
171 #define	MMU060_MA	(0x08000000)	/* misaligned */
172 #define	MMU060_LK	(0x02000000)	/* locked transfer */
173 #define	MMU060_RW	(0x01800000)	/* read/write */
174 # define MMU060_RW_W	(0x00800000)	/* write */
175 # define MMU060_RW_R	(0x01000000)	/* read */
176 # define MMU060_RW_RMW	(0x01800000)	/* read/modify/write */
177 # define MMU060_W	(0x00800000)	/* general write, includes rmw */
178 #define	MMU060_SIZ	(0x00600000)	/* transfer size */
179 #define	MMU060_TT	(0x00180000)	/* transfer type (TT) bits */
180 #define	MMU060_TM	(0x00070000)	/* transfer modifier (TM) bits */
181 #define	MMU060_IO	(0x00008000)	/* instruction or operand */
182 #define	MMU060_PBE	(0x00004000)	/* push buffer bus error */
183 #define	MMU060_SBE	(0x00002000)	/* store buffer bus error */
184 #define	MMU060_PTA	(0x00001000)	/* pointer A fault */
185 #define	MMU060_PTB	(0x00000800)	/* pointer B fault */
186 #define	MMU060_IL	(0x00000400)	/* double indirect descr fault */
187 #define	MMU060_PF	(0x00000200)	/* page fault (invalid descr) */
188 #define	MMU060_SP	(0x00000100)	/* supervisor protection */
189 #define	MMU060_WP	(0x00000080)	/* write protection */
190 #define	MMU060_TWE	(0x00000040)	/* bus error on table search */
191 #define	MMU060_RE	(0x00000020)	/* bus error on read */
192 #define	MMU060_WE	(0x00000010)	/* bus error on write */
193 #define	MMU060_TTR	(0x00000008)	/* error caused by TTR translation */
194 #define	MMU060_BPE	(0x00000004)	/* branch prediction error */
195 #define	MMU060_SEE	(0x00000001)	/* software emulated error */
196 
197 /* cases of missing or invalid descriptors */
198 #define MMU060_DESC_ERR (MMU060_PTA | MMU060_PTB | \
199 			 MMU060_IL  | MMU060_PF)
200 /* bits that indicate real errors */
201 #define MMU060_ERR_BITS (MMU060_PBE | MMU060_SBE | MMU060_DESC_ERR | MMU060_SP | \
202 			 MMU060_WP  | MMU060_TWE | MMU060_RE       | MMU060_WE)
203 
204 /* structure for stack frames */
205 
206 struct frame {
207     struct pt_regs ptregs;
208     union {
209 	    struct {
210 		    unsigned long  iaddr;    /* instruction address */
211 	    } fmt2;
212 	    struct {
213 		    unsigned long  effaddr;  /* effective address */
214 	    } fmt3;
215 	    struct {
216 		    unsigned long  effaddr;  /* effective address */
217 		    unsigned long  pc;	     /* pc of faulted instr */
218 	    } fmt4;
219 	    struct {
220 		    unsigned long  effaddr;  /* effective address */
221 		    unsigned short ssw;      /* special status word */
222 		    unsigned short wb3s;     /* write back 3 status */
223 		    unsigned short wb2s;     /* write back 2 status */
224 		    unsigned short wb1s;     /* write back 1 status */
225 		    unsigned long  faddr;    /* fault address */
226 		    unsigned long  wb3a;     /* write back 3 address */
227 		    unsigned long  wb3d;     /* write back 3 data */
228 		    unsigned long  wb2a;     /* write back 2 address */
229 		    unsigned long  wb2d;     /* write back 2 data */
230 		    unsigned long  wb1a;     /* write back 1 address */
231 		    unsigned long  wb1dpd0;  /* write back 1 data/push data 0*/
232 		    unsigned long  pd1;      /* push data 1*/
233 		    unsigned long  pd2;      /* push data 2*/
234 		    unsigned long  pd3;      /* push data 3*/
235 	    } fmt7;
236 	    struct {
237 		    unsigned long  iaddr;    /* instruction address */
238 		    unsigned short int1[4];  /* internal registers */
239 	    } fmt9;
240 	    struct {
241 		    unsigned short int1;
242 		    unsigned short ssw;      /* special status word */
243 		    unsigned short isc;      /* instruction stage c */
244 		    unsigned short isb;      /* instruction stage b */
245 		    unsigned long  daddr;    /* data cycle fault address */
246 		    unsigned short int2[2];
247 		    unsigned long  dobuf;    /* data cycle output buffer */
248 		    unsigned short int3[2];
249 	    } fmta;
250 	    struct {
251 		    unsigned short int1;
252 		    unsigned short ssw;     /* special status word */
253 		    unsigned short isc;     /* instruction stage c */
254 		    unsigned short isb;     /* instruction stage b */
255 		    unsigned long  daddr;   /* data cycle fault address */
256 		    unsigned short int2[2];
257 		    unsigned long  dobuf;   /* data cycle output buffer */
258 		    unsigned short int3[4];
259 		    unsigned long  baddr;   /* stage B address */
260 		    unsigned short int4[2];
261 		    unsigned long  dibuf;   /* data cycle input buffer */
262 		    unsigned short int5[3];
263 		    unsigned	   ver : 4; /* stack frame version # */
264 		    unsigned	   int6:12;
265 		    unsigned short int7[18];
266 	    } fmtb;
267     } un;
268 };
269 
270 #ifdef CONFIG_M68040
271 asmlinkage void berr_040cleanup(struct frame *fp);
272 #endif
273 
274 #endif /* __ASSEMBLY__ */
275 
276 #endif /* _M68K_TRAPS_H */
277