1 |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 |MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY G 2 |MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
3 |M68000 Hi-Performance Microprocessor Division 3 |M68000 Hi-Performance Microprocessor Division
4 |M68060 Software Package 4 |M68060 Software Package
5 |Production Release P1.00 -- October 10, 1994 5 |Production Release P1.00 -- October 10, 1994
6 | 6 |
7 |M68060 Software Package Copyright © 1993, 19 7 |M68060 Software Package Copyright © 1993, 1994 Motorola Inc. All rights reserved.
8 | 8 |
9 |THE SOFTWARE is provided on an "AS IS" basis 9 |THE SOFTWARE is provided on an "AS IS" basis and without warranty.
10 |To the maximum extent permitted by applicable 10 |To the maximum extent permitted by applicable law,
11 |MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXP 11 |MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
12 |INCLUDING IMPLIED WARRANTIES OF MERCHANTABILI 12 |INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
13 |and any warranty against infringement with re 13 |and any warranty against infringement with regard to the SOFTWARE
14 |(INCLUDING ANY MODIFIED VERSIONS THEREOF) and 14 |(INCLUDING ANY MODIFIED VERSIONS THEREOF) and any accompanying written materials.
15 | 15 |
16 |To the maximum extent permitted by applicable 16 |To the maximum extent permitted by applicable law,
17 |IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY 17 |IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
18 |(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LO 18 |(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
19 |BUSINESS INTERRUPTION, LOSS OF BUSINESS INFOR 19 |BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS)
20 |ARISING OF THE USE OR INABILITY TO USE THE SO 20 |ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
21 |Motorola assumes no responsibility for the ma 21 |Motorola assumes no responsibility for the maintenance and support of the SOFTWARE.
22 | 22 |
23 |You are hereby granted a copyright license to 23 |You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE
24 |so long as this entire notice is retained wit 24 |so long as this entire notice is retained without alteration in any modified and/or
25 |redistributed versions, and that such modifie 25 |redistributed versions, and that such modified versions are clearly identified as such.
26 |No licenses are granted by implication, estop 26 |No licenses are granted by implication, estoppel or otherwise under any patents
27 |or trademarks of Motorola, Inc. 27 |or trademarks of Motorola, Inc.
28 |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 28 |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
29 | os.s 29 | os.s
30 | 30 |
31 | This file contains: 31 | This file contains:
32 | - example "Call-Out"s required by both 32 | - example "Call-Out"s required by both the ISP and FPSP.
33 | 33 |
34 34
35 #include <linux/linkage.h> 35 #include <linux/linkage.h>
36 36
37 |################################ 37 |################################
38 | EXAMPLE CALL-OUTS # 38 | EXAMPLE CALL-OUTS #
39 | # 39 | #
40 | _060_dmem_write() # 40 | _060_dmem_write() #
41 | _060_dmem_read() # 41 | _060_dmem_read() #
42 | _060_imem_read() # 42 | _060_imem_read() #
43 | _060_dmem_read_byte() # 43 | _060_dmem_read_byte() #
44 | _060_dmem_read_word() # 44 | _060_dmem_read_word() #
45 | _060_dmem_read_long() # 45 | _060_dmem_read_long() #
46 | _060_imem_read_word() # 46 | _060_imem_read_word() #
47 | _060_imem_read_long() # 47 | _060_imem_read_long() #
48 | _060_dmem_write_byte() # 48 | _060_dmem_write_byte() #
49 | _060_dmem_write_word() # 49 | _060_dmem_write_word() #
50 | _060_dmem_write_long() # 50 | _060_dmem_write_long() #
51 | # 51 | #
52 | _060_real_trace() # 52 | _060_real_trace() #
53 | _060_real_access() # 53 | _060_real_access() #
54 |################################ 54 |################################
55 55
56 | 56 |
57 | Each IO routine checks to see if the memory 57 | Each IO routine checks to see if the memory write/read is to/from user
58 | or supervisor application space. The example 58 | or supervisor application space. The examples below use simple "move"
59 | instructions for supervisor mode application 59 | instructions for supervisor mode applications and call _copyin()/_copyout()
60 | for user mode applications. 60 | for user mode applications.
61 | When installing the 060SP, the _copyin()/_co 61 | When installing the 060SP, the _copyin()/_copyout() equivalents for a
62 | given operating system should be substituted 62 | given operating system should be substituted.
63 | 63 |
64 | The addresses within the 060SP are guarantee 64 | The addresses within the 060SP are guaranteed to be on the stack.
65 | The result is that Unix processes are allowe 65 | The result is that Unix processes are allowed to sleep as a consequence
66 | of a page fault during a _copyout. 66 | of a page fault during a _copyout.
67 | 67 |
68 | Linux/68k: The _060_[id]mem_{read,write}_{by 68 | Linux/68k: The _060_[id]mem_{read,write}_{byte,word,long} functions
69 | (i.e. all the known length <= 4) are impleme 69 | (i.e. all the known length <= 4) are implemented by single moves
70 | statements instead of (more expensive) copy{ 70 | statements instead of (more expensive) copy{in,out} calls, if
71 | working in user space 71 | working in user space
72 72
73 | 73 |
74 | _060_dmem_write(): 74 | _060_dmem_write():
75 | 75 |
76 | Writes to data memory while in supervisor mo 76 | Writes to data memory while in supervisor mode.
77 | 77 |
78 | INPUTS: 78 | INPUTS:
79 | a0 - supervisor source address 79 | a0 - supervisor source address
80 | a1 - user destination address 80 | a1 - user destination address
81 | d0 - number of bytes to write 81 | d0 - number of bytes to write
82 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 82 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
83 | OUTPUTS: 83 | OUTPUTS:
84 | d1 - 0 = success, !0 = failure 84 | d1 - 0 = success, !0 = failure
85 | 85 |
86 .global _060_dmem_write 86 .global _060_dmem_write
87 _060_dmem_write: 87 _060_dmem_write:
88 subq.l #1,%d0 88 subq.l #1,%d0
89 btst #0x5,0x4(%a6) 89 btst #0x5,0x4(%a6) | check for supervisor state
90 beqs user_write 90 beqs user_write
91 super_write: 91 super_write:
92 move.b (%a0)+,(%a1)+ 92 move.b (%a0)+,(%a1)+ | copy 1 byte
93 dbra %d0,super_write 93 dbra %d0,super_write | quit if --ctr < 0
94 clr.l %d1 94 clr.l %d1 | return success
95 rts 95 rts
96 user_write: 96 user_write:
97 move.b (%a0)+,%d1 97 move.b (%a0)+,%d1 | copy 1 byte
98 copyoutae: 98 copyoutae:
99 movs.b %d1,(%a1)+ 99 movs.b %d1,(%a1)+
100 dbra %d0,user_write 100 dbra %d0,user_write | quit if --ctr < 0
101 clr.l %d1 101 clr.l %d1 | return success
102 rts 102 rts
103 103
104 | 104 |
105 | _060_imem_read(), _060_dmem_read(): 105 | _060_imem_read(), _060_dmem_read():
106 | 106 |
107 | Reads from data/instruction memory while in 107 | Reads from data/instruction memory while in supervisor mode.
108 | 108 |
109 | INPUTS: 109 | INPUTS:
110 | a0 - user source address 110 | a0 - user source address
111 | a1 - supervisor destination address 111 | a1 - supervisor destination address
112 | d0 - number of bytes to read 112 | d0 - number of bytes to read
113 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 113 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
114 | OUTPUTS: 114 | OUTPUTS:
115 | d1 - 0 = success, !0 = failure 115 | d1 - 0 = success, !0 = failure
116 | 116 |
117 .global _060_imem_read 117 .global _060_imem_read
118 .global _060_dmem_read 118 .global _060_dmem_read
119 _060_imem_read: 119 _060_imem_read:
120 _060_dmem_read: 120 _060_dmem_read:
121 subq.l #1,%d0 121 subq.l #1,%d0
122 btst #0x5,0x4(%a6) 122 btst #0x5,0x4(%a6) | check for supervisor state
123 beqs user_read 123 beqs user_read
124 super_read: 124 super_read:
125 move.b (%a0)+,(%a1)+ 125 move.b (%a0)+,(%a1)+ | copy 1 byte
126 dbra %d0,super_read 126 dbra %d0,super_read | quit if --ctr < 0
127 clr.l %d1 127 clr.l %d1 | return success
128 rts 128 rts
129 user_read: 129 user_read:
130 copyinae: 130 copyinae:
131 movs.b (%a0)+,%d1 131 movs.b (%a0)+,%d1
132 move.b %d1,(%a1)+ 132 move.b %d1,(%a1)+ | copy 1 byte
133 dbra %d0,user_read 133 dbra %d0,user_read | quit if --ctr < 0
134 clr.l %d1 134 clr.l %d1 | return success
135 rts 135 rts
136 136
137 | 137 |
138 | _060_dmem_read_byte(): 138 | _060_dmem_read_byte():
139 | 139 |
140 | Read a data byte from user memory. 140 | Read a data byte from user memory.
141 | 141 |
142 | INPUTS: 142 | INPUTS:
143 | a0 - user source address 143 | a0 - user source address
144 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 144 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
145 | OUTPUTS: 145 | OUTPUTS:
146 | d0 - data byte in d0 146 | d0 - data byte in d0
147 | d1 - 0 = success, !0 = failure 147 | d1 - 0 = success, !0 = failure
148 | 148 |
149 .global _060_dmem_read_byte 149 .global _060_dmem_read_byte
150 _060_dmem_read_byte: 150 _060_dmem_read_byte:
151 clr.l %d0 151 clr.l %d0 | clear whole longword
152 clr.l %d1 152 clr.l %d1 | assume success
153 btst #0x5,0x4(%a6) 153 btst #0x5,0x4(%a6) | check for supervisor state
154 bnes dmrbs 154 bnes dmrbs | supervisor
155 dmrbuae:movs.b (%a0),%d0 155 dmrbuae:movs.b (%a0),%d0 | fetch user byte
156 rts 156 rts
157 dmrbs: move.b (%a0),%d0 157 dmrbs: move.b (%a0),%d0 | fetch super byte
158 rts 158 rts
159 159
160 | 160 |
161 | _060_dmem_read_word(): 161 | _060_dmem_read_word():
162 | 162 |
163 | Read a data word from user memory. 163 | Read a data word from user memory.
164 | 164 |
165 | INPUTS: 165 | INPUTS:
166 | a0 - user source address 166 | a0 - user source address
167 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 167 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
168 | OUTPUTS: 168 | OUTPUTS:
169 | d0 - data word in d0 169 | d0 - data word in d0
170 | d1 - 0 = success, !0 = failure 170 | d1 - 0 = success, !0 = failure
171 | 171 |
172 | _060_imem_read_word(): 172 | _060_imem_read_word():
173 | 173 |
174 | Read an instruction word from user memory. 174 | Read an instruction word from user memory.
175 | 175 |
176 | INPUTS: 176 | INPUTS:
177 | a0 - user source address 177 | a0 - user source address
178 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 178 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
179 | OUTPUTS: 179 | OUTPUTS:
180 | d0 - instruction word in d0 180 | d0 - instruction word in d0
181 | d1 - 0 = success, !0 = failure 181 | d1 - 0 = success, !0 = failure
182 | 182 |
183 .global _060_dmem_read_word 183 .global _060_dmem_read_word
184 .global _060_imem_read_word 184 .global _060_imem_read_word
185 _060_dmem_read_word: 185 _060_dmem_read_word:
186 _060_imem_read_word: 186 _060_imem_read_word:
187 clr.l %d1 187 clr.l %d1 | assume success
188 clr.l %d0 188 clr.l %d0 | clear whole longword
189 btst #0x5,0x4(%a6) 189 btst #0x5,0x4(%a6) | check for supervisor state
190 bnes dmrws 190 bnes dmrws | supervisor
191 dmrwuae:movs.w (%a0), %d0 191 dmrwuae:movs.w (%a0), %d0 | fetch user word
192 rts 192 rts
193 dmrws: move.w (%a0), %d0 193 dmrws: move.w (%a0), %d0 | fetch super word
194 rts 194 rts
195 195
196 | 196 |
197 | _060_dmem_read_long(): 197 | _060_dmem_read_long():
198 | 198 |
199 199
200 | 200 |
201 | INPUTS: 201 | INPUTS:
202 | a0 - user source address 202 | a0 - user source address
203 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 203 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
204 | OUTPUTS: 204 | OUTPUTS:
205 | d0 - data longword in d0 205 | d0 - data longword in d0
206 | d1 - 0 = success, !0 = failure 206 | d1 - 0 = success, !0 = failure
207 | 207 |
208 | _060_imem_read_long(): 208 | _060_imem_read_long():
209 | 209 |
210 | Read an instruction longword from user memor 210 | Read an instruction longword from user memory.
211 | 211 |
212 | INPUTS: 212 | INPUTS:
213 | a0 - user source address 213 | a0 - user source address
214 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 214 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
215 | OUTPUTS: 215 | OUTPUTS:
216 | d0 - instruction longword in d0 216 | d0 - instruction longword in d0
217 | d1 - 0 = success, !0 = failure 217 | d1 - 0 = success, !0 = failure
218 | 218 |
219 .global _060_dmem_read_long 219 .global _060_dmem_read_long
220 .global _060_imem_read_long 220 .global _060_imem_read_long
221 _060_dmem_read_long: 221 _060_dmem_read_long:
222 _060_imem_read_long: 222 _060_imem_read_long:
223 clr.l %d1 223 clr.l %d1 | assume success
224 btst #0x5,0x4(%a6) 224 btst #0x5,0x4(%a6) | check for supervisor state
225 bnes dmrls 225 bnes dmrls | supervisor
226 dmrluae:movs.l (%a0),%d0 226 dmrluae:movs.l (%a0),%d0 | fetch user longword
227 rts 227 rts
228 dmrls: move.l (%a0),%d0 228 dmrls: move.l (%a0),%d0 | fetch super longword
229 rts 229 rts
230 230
231 | 231 |
232 | _060_dmem_write_byte(): 232 | _060_dmem_write_byte():
233 | 233 |
234 | Write a data byte to user memory. 234 | Write a data byte to user memory.
235 | 235 |
236 | INPUTS: 236 | INPUTS:
237 | a0 - user destination address 237 | a0 - user destination address
238 | d0 - data byte in d0 238 | d0 - data byte in d0
239 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 239 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
240 | OUTPUTS: 240 | OUTPUTS:
241 | d1 - 0 = success, !0 = failure 241 | d1 - 0 = success, !0 = failure
242 | 242 |
243 .global _060_dmem_write_byte 243 .global _060_dmem_write_byte
244 _060_dmem_write_byte: 244 _060_dmem_write_byte:
245 clr.l %d1 245 clr.l %d1 | assume success
246 btst #0x5,0x4(%a6) 246 btst #0x5,0x4(%a6) | check for supervisor state
247 bnes dmwbs 247 bnes dmwbs | supervisor
248 dmwbuae:movs.b %d0,(%a0) 248 dmwbuae:movs.b %d0,(%a0) | store user byte
249 rts 249 rts
250 dmwbs: move.b %d0,(%a0) 250 dmwbs: move.b %d0,(%a0) | store super byte
251 rts 251 rts
252 252
253 | 253 |
254 | _060_dmem_write_word(): 254 | _060_dmem_write_word():
255 | 255 |
256 | Write a data word to user memory. 256 | Write a data word to user memory.
257 | 257 |
258 | INPUTS: 258 | INPUTS:
259 | a0 - user destination address 259 | a0 - user destination address
260 | d0 - data word in d0 260 | d0 - data word in d0
261 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 261 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
262 | OUTPUTS: 262 | OUTPUTS:
263 | d1 - 0 = success, !0 = failure 263 | d1 - 0 = success, !0 = failure
264 | 264 |
265 .global _060_dmem_write_word 265 .global _060_dmem_write_word
266 _060_dmem_write_word: 266 _060_dmem_write_word:
267 clr.l %d1 267 clr.l %d1 | assume success
268 btst #0x5,0x4(%a6) 268 btst #0x5,0x4(%a6) | check for supervisor state
269 bnes dmwws 269 bnes dmwws | supervisor
270 dmwwu: 270 dmwwu:
271 dmwwuae:movs.w %d0,(%a0) 271 dmwwuae:movs.w %d0,(%a0) | store user word
272 bras dmwwr 272 bras dmwwr
273 dmwws: move.w %d0,(%a0) 273 dmwws: move.w %d0,(%a0) | store super word
274 dmwwr: clr.l %d1 274 dmwwr: clr.l %d1 | return success
275 rts 275 rts
276 276
277 | 277 |
278 | _060_dmem_write_long(): 278 | _060_dmem_write_long():
279 | 279 |
280 | Write a data longword to user memory. 280 | Write a data longword to user memory.
281 | 281 |
282 | INPUTS: 282 | INPUTS:
283 | a0 - user destination address 283 | a0 - user destination address
284 | d0 - data longword in d0 284 | d0 - data longword in d0
285 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 285 | 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
286 | OUTPUTS: 286 | OUTPUTS:
287 | d1 - 0 = success, !0 = failure 287 | d1 - 0 = success, !0 = failure
288 | 288 |
289 .global _060_dmem_write_long 289 .global _060_dmem_write_long
290 _060_dmem_write_long: 290 _060_dmem_write_long:
291 clr.l %d1 291 clr.l %d1 | assume success
292 btst #0x5,0x4(%a6) 292 btst #0x5,0x4(%a6) | check for supervisor state
293 bnes dmwls 293 bnes dmwls | supervisor
294 dmwluae:movs.l %d0,(%a0) 294 dmwluae:movs.l %d0,(%a0) | store user longword
295 rts 295 rts
296 dmwls: move.l %d0,(%a0) 296 dmwls: move.l %d0,(%a0) | store super longword
297 rts 297 rts
298 298
299 299
300 #if 0 300 #if 0
301 |############################################# 301 |###############################################
302 302
303 | 303 |
304 | Use these routines if your kernel doesn't ha 304 | Use these routines if your kernel doesn't have _copyout/_copyin equivalents.
305 | Assumes that D0/D1/A0/A1 are scratch registe 305 | Assumes that D0/D1/A0/A1 are scratch registers. The _copyin/_copyout
306 | below assume that the SFC/DFC have been set 306 | below assume that the SFC/DFC have been set previously.
307 | 307 |
308 | Linux/68k: These are basically non-inlined v 308 | Linux/68k: These are basically non-inlined versions of
309 | memcpy_{to,from}fs, but without long-transfe 309 | memcpy_{to,from}fs, but without long-transfer optimization
310 | Note: Assumed that SFC/DFC are pointing corr 310 | Note: Assumed that SFC/DFC are pointing correctly to user data
311 | space... Should be right, or are there any e 311 | space... Should be right, or are there any exceptions?
312 312
313 | 313 |
314 | int _copyout(supervisor_addr, user_addr, nby 314 | int _copyout(supervisor_addr, user_addr, nbytes)
315 | 315 |
316 .global _copyout 316 .global _copyout
317 _copyout: 317 _copyout:
318 move.l 4(%sp),%a0 318 move.l 4(%sp),%a0 | source
319 move.l 8(%sp),%a1 319 move.l 8(%sp),%a1 | destination
320 move.l 12(%sp),%d0 320 move.l 12(%sp),%d0 | count
321 subq.l #1,%d0 321 subq.l #1,%d0
322 moreout: 322 moreout:
323 move.b (%a0)+,%d1 323 move.b (%a0)+,%d1 | fetch supervisor byte
324 copyoutae: 324 copyoutae:
325 movs.b %d1,(%a1)+ 325 movs.b %d1,(%a1)+ | store user byte
326 dbra %d0,moreout 326 dbra %d0,moreout | are we through yet?
327 moveq #0,%d0 327 moveq #0,%d0 | return success
328 rts 328 rts
329 329
330 | 330 |
331 | int _copyin(user_addr, supervisor_addr, nbyt 331 | int _copyin(user_addr, supervisor_addr, nbytes)
332 | 332 |
333 .global _copyin 333 .global _copyin
334 _copyin: 334 _copyin:
335 move.l 4(%sp),%a0 335 move.l 4(%sp),%a0 | source
336 move.l 8(%sp),%a1 336 move.l 8(%sp),%a1 | destination
337 move.l 12(%sp),%d0 337 move.l 12(%sp),%d0 | count
338 subq.l #1,%d0 338 subq.l #1,%d0
339 morein: 339 morein:
340 copyinae: 340 copyinae:
341 movs.b (%a0)+,%d1 341 movs.b (%a0)+,%d1 | fetch user byte
342 move.b %d1,(%a1)+ 342 move.b %d1,(%a1)+ | write supervisor byte
343 dbra %d0,morein 343 dbra %d0,morein | are we through yet?
344 moveq #0,%d0 344 moveq #0,%d0 | return success
345 rts 345 rts
346 #endif 346 #endif
347 347
348 |############################################# 348 |###########################################################################
349 349
350 | 350 |
351 | _060_real_trace(): 351 | _060_real_trace():
352 | 352 |
353 | This is the exit point for the 060FPSP when 353 | This is the exit point for the 060FPSP when an instruction is being traced
354 | and there are no other higher priority excep 354 | and there are no other higher priority exceptions pending for this instruction
355 | or they have already been processed. 355 | or they have already been processed.
356 | 356 |
357 | The sample code below simply executes an "rt 357 | The sample code below simply executes an "rte".
358 | 358 |
359 .global _060_real_trace 359 .global _060_real_trace
360 _060_real_trace: 360 _060_real_trace:
361 bral trap 361 bral trap
362 362
363 | 363 |
364 | _060_real_access(): 364 | _060_real_access():
365 | 365 |
366 | This is the exit point for the 060FPSP when 366 | This is the exit point for the 060FPSP when an access error exception
367 | is encountered. The routine below should poi 367 | is encountered. The routine below should point to the operating system
368 | handler for access error exceptions. The exc 368 | handler for access error exceptions. The exception stack frame is an
369 | 8-word access error frame. 369 | 8-word access error frame.
370 | 370 |
371 | The sample routine below simply executes an 371 | The sample routine below simply executes an "rte" instruction which
372 | is most likely the incorrect thing to do and 372 | is most likely the incorrect thing to do and could put the system
373 | into an infinite loop. 373 | into an infinite loop.
374 | 374 |
375 .global _060_real_access 375 .global _060_real_access
376 _060_real_access: 376 _060_real_access:
377 bral buserr 377 bral buserr
378 378
379 379
380 380
381 | Execption handling for movs access to illega 381 | Execption handling for movs access to illegal memory
382 .section .fixup,"ax" 382 .section .fixup,"ax"
383 .even 383 .even
384 1: moveq #-1,%d1 384 1: moveq #-1,%d1
385 rts 385 rts
386 .section __ex_table,"a" 386 .section __ex_table,"a"
387 .align 4 387 .align 4
388 .long dmrbuae,1b 388 .long dmrbuae,1b
389 .long dmrwuae,1b 389 .long dmrwuae,1b
390 .long dmrluae,1b 390 .long dmrluae,1b
391 .long dmwbuae,1b 391 .long dmwbuae,1b
392 .long dmwwuae,1b 392 .long dmwwuae,1b
393 .long dmwluae,1b 393 .long dmwluae,1b
394 .long copyoutae,1b 394 .long copyoutae,1b
395 .long copyinae,1b 395 .long copyinae,1b
396 .text 396 .text
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