| 1 |
199 |
simons |
|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
| 2 |
|
|
|MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
|
| 3 |
|
|
|M68000 Hi-Performance Microprocessor Division
|
| 4 |
|
|
|M68060 Software Package
|
| 5 |
|
|
|Production Release P1.00 -- October 10, 1994
|
| 6 |
|
|
|
|
| 7 |
|
|
|M68060 Software Package Copyright © 1993, 1994 Motorola Inc. All rights reserved.
|
| 8 |
|
|
|
|
| 9 |
|
|
|THE SOFTWARE is provided on an "AS IS" basis and without warranty.
|
| 10 |
|
|
|To the maximum extent permitted by applicable law,
|
| 11 |
|
|
|MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
|
| 12 |
|
|
|INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
|
| 13 |
|
|
|and any warranty against infringement with regard to the SOFTWARE
|
| 14 |
|
|
|(INCLUDING ANY MODIFIED VERSIONS THEREOF) and any accompanying written materials.
|
| 15 |
|
|
|
|
| 16 |
|
|
|To the maximum extent permitted by applicable law,
|
| 17 |
|
|
|IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
|
| 18 |
|
|
|(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
|
| 19 |
|
|
|BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS)
|
| 20 |
|
|
|ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
|
| 21 |
|
|
|Motorola assumes no responsibility for the maintenance and support of the SOFTWARE.
|
| 22 |
|
|
|
|
| 23 |
|
|
|You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE
|
| 24 |
|
|
|so long as this entire notice is retained without alteration in any modified and/or
|
| 25 |
|
|
|redistributed versions, and that such modified versions are clearly identified as such.
|
| 26 |
|
|
|No licenses are granted by implication, estoppel or otherwise under any patents
|
| 27 |
|
|
|or trademarks of Motorola, Inc.
|
| 28 |
|
|
|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
| 29 |
|
|
| os.s
|
| 30 |
|
|
|
|
| 31 |
|
|
| This file contains:
|
| 32 |
|
|
| - example "Call-Out"s required by both the ISP and FPSP.
|
| 33 |
|
|
|
|
| 34 |
|
|
|
| 35 |
|
|
|
| 36 |
|
|
|################################
|
| 37 |
|
|
| EXAMPLE CALL-OUTS #
|
| 38 |
|
|
| #
|
| 39 |
|
|
| _060_dmem_write() #
|
| 40 |
|
|
| _060_dmem_read() #
|
| 41 |
|
|
| _060_imem_read() #
|
| 42 |
|
|
| _060_dmem_read_byte() #
|
| 43 |
|
|
| _060_dmem_read_word() #
|
| 44 |
|
|
| _060_dmem_read_long() #
|
| 45 |
|
|
| _060_imem_read_word() #
|
| 46 |
|
|
| _060_imem_read_long() #
|
| 47 |
|
|
| _060_dmem_write_byte() #
|
| 48 |
|
|
| _060_dmem_write_word() #
|
| 49 |
|
|
| _060_dmem_write_long() #
|
| 50 |
|
|
| #
|
| 51 |
|
|
| _060_real_trace() #
|
| 52 |
|
|
| _060_real_access() #
|
| 53 |
|
|
|################################
|
| 54 |
|
|
|
| 55 |
|
|
|
|
| 56 |
|
|
| Each IO routine checks to see if the memory write/read is to/from user
|
| 57 |
|
|
| or supervisor application space. The examples below use simple "move"
|
| 58 |
|
|
| instructions for supervisor mode applications and call _copyin()/_copyout()
|
| 59 |
|
|
| for user mode applications.
|
| 60 |
|
|
| When installing the 060SP, the _copyin()/_copyout() equivalents for a
|
| 61 |
|
|
| given operating system should be substituted.
|
| 62 |
|
|
|
|
| 63 |
|
|
| The addresses within the 060SP are guaranteed to be on the stack.
|
| 64 |
|
|
| The result is that Unix processes are allowed to sleep as a consequence
|
| 65 |
|
|
| of a page fault during a _copyout.
|
| 66 |
|
|
|
|
| 67 |
|
|
|
| 68 |
|
|
|
|
| 69 |
|
|
| _060_dmem_write():
|
| 70 |
|
|
|
|
| 71 |
|
|
| Writes to data memory while in supervisor mode.
|
| 72 |
|
|
|
|
| 73 |
|
|
| INPUTS:
|
| 74 |
|
|
| a0 - supervisor source address
|
| 75 |
|
|
| a1 - user destination address
|
| 76 |
|
|
| d0 - number of bytes to write
|
| 77 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 78 |
|
|
| OUTPUTS:
|
| 79 |
|
|
| d1 - 0 = success, !0 = failure
|
| 80 |
|
|
|
|
| 81 |
|
|
.global _060_dmem_write
|
| 82 |
|
|
_060_dmem_write:
|
| 83 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 84 |
|
|
beqs user_write
|
| 85 |
|
|
super_write:
|
| 86 |
|
|
move.b (%a0)+,(%a1)+ | copy 1 byte
|
| 87 |
|
|
subq.l #0x1,%d0 | decr byte counter
|
| 88 |
|
|
bnes super_write | quit if ctr = 0
|
| 89 |
|
|
clr.l %d1 | return success
|
| 90 |
|
|
rts
|
| 91 |
|
|
user_write:
|
| 92 |
|
|
move.l %d0,-(%sp) | pass: counter
|
| 93 |
|
|
move.l %a1,-(%sp) | pass: user dst
|
| 94 |
|
|
move.l %a0,-(%sp) | pass: supervisor src
|
| 95 |
|
|
bsr.l _copyout | write byte to user mem
|
| 96 |
|
|
move.l %d0,%d1 | return success
|
| 97 |
|
|
add.l #0xc, %sp | clear 3 lw params
|
| 98 |
|
|
rts
|
| 99 |
|
|
|
| 100 |
|
|
|
|
| 101 |
|
|
| _060_imem_read(), _060_dmem_read():
|
| 102 |
|
|
|
|
| 103 |
|
|
| Reads from data/instruction memory while in supervisor mode.
|
| 104 |
|
|
|
|
| 105 |
|
|
| INPUTS:
|
| 106 |
|
|
| a0 - user source address
|
| 107 |
|
|
| a1 - supervisor destination address
|
| 108 |
|
|
| d0 - number of bytes to read
|
| 109 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 110 |
|
|
| OUTPUTS:
|
| 111 |
|
|
| d1 - 0 = success, !0 = failure
|
| 112 |
|
|
|
|
| 113 |
|
|
.global _060_imem_read
|
| 114 |
|
|
.global _060_dmem_read
|
| 115 |
|
|
_060_imem_read:
|
| 116 |
|
|
_060_dmem_read:
|
| 117 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 118 |
|
|
beqs user_read
|
| 119 |
|
|
super_read:
|
| 120 |
|
|
move.b (%a0)+,(%a1)+ | copy 1 byte
|
| 121 |
|
|
subq.l #0x1,%d0 | decr byte counter
|
| 122 |
|
|
bnes super_read | quit if ctr = 0
|
| 123 |
|
|
clr.l %d1 | return success
|
| 124 |
|
|
rts
|
| 125 |
|
|
user_read:
|
| 126 |
|
|
move.l %d0,-(%sp) | pass: counter
|
| 127 |
|
|
move.l %a1,-(%sp) | pass: super dst
|
| 128 |
|
|
move.l %a0,-(%sp) | pass: user src
|
| 129 |
|
|
bsr.l _copyin | read byte from user mem
|
| 130 |
|
|
move.l %d0,%d1 | return success
|
| 131 |
|
|
add.l #0xc,%sp | clear 3 lw params
|
| 132 |
|
|
rts
|
| 133 |
|
|
|
| 134 |
|
|
|
|
| 135 |
|
|
| _060_dmem_read_byte():
|
| 136 |
|
|
|
|
| 137 |
|
|
| Read a data byte from user memory.
|
| 138 |
|
|
|
|
| 139 |
|
|
| INPUTS:
|
| 140 |
|
|
| a0 - user source address
|
| 141 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 142 |
|
|
| OUTPUTS:
|
| 143 |
|
|
| d0 - data byte in d0
|
| 144 |
|
|
| d1 - 0 = success, !0 = failure
|
| 145 |
|
|
|
|
| 146 |
|
|
.global _060_dmem_read_byte
|
| 147 |
|
|
_060_dmem_read_byte:
|
| 148 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 149 |
|
|
bnes dmrbs | supervisor
|
| 150 |
|
|
dmrbu: clr.l -(%sp) | clear space on stack for result
|
| 151 |
|
|
move.l #0x1,-(%sp) | pass: # bytes to copy
|
| 152 |
|
|
pea 0x7(%sp) | pass: dst addr (stack)
|
| 153 |
|
|
move.l %a0,-(%sp) | pass: src addr (user mem)
|
| 154 |
|
|
bsr.l _copyin | "copy in" the data
|
| 155 |
|
|
move.l %d0,%d1 | return success
|
| 156 |
|
|
add.l #0xc,%sp | delete params
|
| 157 |
|
|
move.l (%sp)+,%d0 | put answer in d0
|
| 158 |
|
|
rts
|
| 159 |
|
|
dmrbs: clr.l %d0 | clear whole longword
|
| 160 |
|
|
move.b (%a0),%d0 | fetch super byte
|
| 161 |
|
|
clr.l %d1 | return success
|
| 162 |
|
|
rts
|
| 163 |
|
|
|
| 164 |
|
|
|
|
| 165 |
|
|
| _060_dmem_read_word():
|
| 166 |
|
|
|
|
| 167 |
|
|
| Read a data word from user memory.
|
| 168 |
|
|
|
|
| 169 |
|
|
| INPUTS:
|
| 170 |
|
|
| a0 - user source address
|
| 171 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 172 |
|
|
| OUTPUTS:
|
| 173 |
|
|
| d0 - data word in d0
|
| 174 |
|
|
| d1 - 0 = success, !0 = failure
|
| 175 |
|
|
|
|
| 176 |
|
|
.global _060_dmem_read_word
|
| 177 |
|
|
_060_dmem_read_word:
|
| 178 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 179 |
|
|
bnes dmrws | supervisor
|
| 180 |
|
|
dmrwu: clr.l -(%sp) | clear space on stack for result
|
| 181 |
|
|
move.l #0x2,-(%sp) | pass: # bytes to copy
|
| 182 |
|
|
pea 0x6(%sp) | pass: dst addr (stack)
|
| 183 |
|
|
move.l %a0,-(%sp) | pass: src addr (user mem)
|
| 184 |
|
|
bsr.l _copyin | "copy in" the data
|
| 185 |
|
|
move.l %d0,%d1 | return success
|
| 186 |
|
|
add.l #0xc,%sp | delete params
|
| 187 |
|
|
move.l (%sp)+,%d0 | put answer in d0
|
| 188 |
|
|
rts
|
| 189 |
|
|
dmrws: clr.l %d0 | clear whole longword
|
| 190 |
|
|
move.w (%a0), %d0 | fetch super word
|
| 191 |
|
|
clr.l %d1 | return success
|
| 192 |
|
|
rts
|
| 193 |
|
|
|
| 194 |
|
|
|
|
| 195 |
|
|
| _060_dmem_read_long():
|
| 196 |
|
|
|
|
| 197 |
|
|
|
| 198 |
|
|
|
|
| 199 |
|
|
| INPUTS:
|
| 200 |
|
|
| a0 - user source address
|
| 201 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 202 |
|
|
| OUTPUTS:
|
| 203 |
|
|
| d0 - data longword in d0
|
| 204 |
|
|
| d1 - 0 = success, !0 = failure
|
| 205 |
|
|
|
|
| 206 |
|
|
.global _060_dmem_read_long
|
| 207 |
|
|
_060_dmem_read_long:
|
| 208 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 209 |
|
|
bnes dmrls | supervisor
|
| 210 |
|
|
dmrlu: subq.l #0x4,%sp | clear space on stack for result
|
| 211 |
|
|
move.l #0x4,-(%sp) | pass: # bytes to copy
|
| 212 |
|
|
pea 0x4(%sp) | pass: dst addr (stack)
|
| 213 |
|
|
move.l %a0,-(%sp) | pass: src addr (user mem)
|
| 214 |
|
|
bsr.l _copyin | "copy in" the data
|
| 215 |
|
|
move.l %d0,%d1 | return success
|
| 216 |
|
|
add.l #0xc,%sp | delete params
|
| 217 |
|
|
move.l (%sp)+,%d0 | put answer in d0
|
| 218 |
|
|
rts
|
| 219 |
|
|
dmrls: move.l (%a0),%d0 | fetch super longword
|
| 220 |
|
|
clr.l %d1 | return success
|
| 221 |
|
|
rts
|
| 222 |
|
|
|
| 223 |
|
|
|
|
| 224 |
|
|
| _060_dmem_write_byte():
|
| 225 |
|
|
|
|
| 226 |
|
|
| Write a data byte to user memory.
|
| 227 |
|
|
|
|
| 228 |
|
|
| INPUTS:
|
| 229 |
|
|
| a0 - user destination address
|
| 230 |
|
|
| d0 - data byte in d0
|
| 231 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 232 |
|
|
| OUTPUTS:
|
| 233 |
|
|
| d1 - 0 = success, !0 = failure
|
| 234 |
|
|
|
|
| 235 |
|
|
.global _060_dmem_write_byte
|
| 236 |
|
|
_060_dmem_write_byte:
|
| 237 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 238 |
|
|
bnes dmwbs | supervisor
|
| 239 |
|
|
dmwbu: move.l %d0,-(%sp) | put src on stack
|
| 240 |
|
|
move.l #0x1,-(%sp) | pass: # bytes to copy
|
| 241 |
|
|
move.l %a0,-(%sp) | pass: dst addr (user mem)
|
| 242 |
|
|
pea 0xb(%sp) | pass: src addr (stack)
|
| 243 |
|
|
bsr.l _copyout | "copy out" the data
|
| 244 |
|
|
move.l %d0,%d1 | return success
|
| 245 |
|
|
add.l #0x10,%sp | delete params + src
|
| 246 |
|
|
rts
|
| 247 |
|
|
dmwbs: move.b %d0,(%a0) | store super byte
|
| 248 |
|
|
clr.l %d1 | return success
|
| 249 |
|
|
rts
|
| 250 |
|
|
|
| 251 |
|
|
|
|
| 252 |
|
|
| _060_dmem_write_word():
|
| 253 |
|
|
|
|
| 254 |
|
|
| Write a data word to user memory.
|
| 255 |
|
|
|
|
| 256 |
|
|
| INPUTS:
|
| 257 |
|
|
| a0 - user destination address
|
| 258 |
|
|
| d0 - data word in d0
|
| 259 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 260 |
|
|
| OUTPUTS:
|
| 261 |
|
|
| d1 - 0 = success, !0 = failure
|
| 262 |
|
|
|
|
| 263 |
|
|
.global _060_dmem_write_word
|
| 264 |
|
|
_060_dmem_write_word:
|
| 265 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 266 |
|
|
bnes dmwws | supervisor
|
| 267 |
|
|
dmwwu: move.l %d0,-(%sp) | put src on stack
|
| 268 |
|
|
move.l #0x2,-(%sp) | pass: # bytes to copy
|
| 269 |
|
|
move.l %a0,-(%sp) | pass: dst addr (user mem)
|
| 270 |
|
|
pea 0xa(%sp) | pass: src addr (stack)
|
| 271 |
|
|
bsr.l _copyout | "copy out" the data
|
| 272 |
|
|
move.l %d0,%d1 | return success
|
| 273 |
|
|
add.l #0x10,%sp | delete params + src
|
| 274 |
|
|
rts
|
| 275 |
|
|
dmwws: move.w %d0,(%a0) | store super word
|
| 276 |
|
|
clr.l %d1 | return success
|
| 277 |
|
|
rts
|
| 278 |
|
|
|
| 279 |
|
|
|
|
| 280 |
|
|
| _060_dmem_write_long():
|
| 281 |
|
|
|
|
| 282 |
|
|
| Write a data longword to user memory.
|
| 283 |
|
|
|
|
| 284 |
|
|
| INPUTS:
|
| 285 |
|
|
| a0 - user destination address
|
| 286 |
|
|
| d0 - data longword in d0
|
| 287 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 288 |
|
|
| OUTPUTS:
|
| 289 |
|
|
| d1 - 0 = success, !0 = failure
|
| 290 |
|
|
|
|
| 291 |
|
|
.global _060_dmem_write_long
|
| 292 |
|
|
_060_dmem_write_long:
|
| 293 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 294 |
|
|
bnes dmwls | supervisor
|
| 295 |
|
|
dmwlu: move.l %d0,-(%sp) | put src on stack
|
| 296 |
|
|
move.l #0x4,-(%sp) | pass: # bytes to copy
|
| 297 |
|
|
move.l %a0,-(%sp) | pass: dst addr (user mem)
|
| 298 |
|
|
pea 0x8(%sp) | pass: src addr (stack)
|
| 299 |
|
|
bsr.l _copyout | "copy out" the data
|
| 300 |
|
|
move.l %d0,%d1 | return success
|
| 301 |
|
|
add.l #0x10,%sp | delete params + src
|
| 302 |
|
|
rts
|
| 303 |
|
|
dmwls: move.l %d0,(%a0) | store super longword
|
| 304 |
|
|
clr.l %d1 | return success
|
| 305 |
|
|
rts
|
| 306 |
|
|
|
| 307 |
|
|
|
|
| 308 |
|
|
| _060_imem_read_word():
|
| 309 |
|
|
|
|
| 310 |
|
|
| Read an instruction word from user memory.
|
| 311 |
|
|
|
|
| 312 |
|
|
| INPUTS:
|
| 313 |
|
|
| a0 - user source address
|
| 314 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 315 |
|
|
| OUTPUTS:
|
| 316 |
|
|
| d0 - instruction word in d0
|
| 317 |
|
|
| d1 - 0 = success, !0 = failure
|
| 318 |
|
|
|
|
| 319 |
|
|
.global _060_imem_read_word
|
| 320 |
|
|
_060_imem_read_word:
|
| 321 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 322 |
|
|
bnes imrws | supervisor
|
| 323 |
|
|
imrwu: clr.l -(%sp) | clear space on stack for result
|
| 324 |
|
|
move.l #0x2,-(%sp) | pass: # bytes to copy
|
| 325 |
|
|
pea 0x6(%sp) | pass: dst addr (stack)
|
| 326 |
|
|
move.l %a0,-(%sp) | pass: src addr (user mem)
|
| 327 |
|
|
bsr.l _copyin | "copy in" the data
|
| 328 |
|
|
move.l %d0,%d1 | return success
|
| 329 |
|
|
add.l #0xc,%sp | delete params
|
| 330 |
|
|
move.l (%sp)+,%d0 | put answer in d0
|
| 331 |
|
|
rts
|
| 332 |
|
|
imrws: move.w (%a0),%d0 | fetch super word
|
| 333 |
|
|
clr.l %d1 | return success
|
| 334 |
|
|
rts
|
| 335 |
|
|
|
| 336 |
|
|
|
|
| 337 |
|
|
| _060_imem_read_long():
|
| 338 |
|
|
|
|
| 339 |
|
|
| Read an instruction longword from user memory.
|
| 340 |
|
|
|
|
| 341 |
|
|
| INPUTS:
|
| 342 |
|
|
| a0 - user source address
|
| 343 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 344 |
|
|
| OUTPUTS:
|
| 345 |
|
|
| d0 - instruction longword in d0
|
| 346 |
|
|
| d1 - 0 = success, !0 = failure
|
| 347 |
|
|
|
|
| 348 |
|
|
.global _060_imem_read_long
|
| 349 |
|
|
_060_imem_read_long:
|
| 350 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 351 |
|
|
bnes imrls | supervisor
|
| 352 |
|
|
imrlu: subq.l #0x4,%sp | clear space on stack for result
|
| 353 |
|
|
move.l #0x4,-(%sp) | pass: # bytes to copy
|
| 354 |
|
|
pea 0x4(%sp) | pass: dst addr (stack)
|
| 355 |
|
|
move.l %a0,-(%sp) | pass: src addr (user mem)
|
| 356 |
|
|
bsr.l _copyin | "copy in" the data
|
| 357 |
|
|
move.l %d0,%d1 | return success
|
| 358 |
|
|
add.l #0xc,%sp | delete params
|
| 359 |
|
|
move.l (%sp)+,%d0 | put answer in d0
|
| 360 |
|
|
rts
|
| 361 |
|
|
imrls: move.l (%a0),%d0 | fetch super longword
|
| 362 |
|
|
clr.l %d1 | return success
|
| 363 |
|
|
rts
|
| 364 |
|
|
|
| 365 |
|
|
|###############################################
|
| 366 |
|
|
|
| 367 |
|
|
|
|
| 368 |
|
|
| Use these routines if your kernel doesn't have _copyout/_copyin equivalents.
|
| 369 |
|
|
| Assumes that D0/D1/A0/A1 are scratch registers. The _copyin/_copyout
|
| 370 |
|
|
| below assume that the SFC/DFC have been set previously.
|
| 371 |
|
|
|
|
| 372 |
|
|
|
| 373 |
|
|
|
|
| 374 |
|
|
| int _copyout(supervisor_addr, user_addr, nbytes)
|
| 375 |
|
|
|
|
| 376 |
|
|
.global _copyout
|
| 377 |
|
|
_copyout:
|
| 378 |
|
|
move.l 4(%sp),%a0 | source
|
| 379 |
|
|
move.l 8(%sp),%a1 | destination
|
| 380 |
|
|
move.l 12(%sp),%d0 | count
|
| 381 |
|
|
moreout:
|
| 382 |
|
|
move.b (%a0)+,%d1 | fetch supervisor byte
|
| 383 |
|
|
movs.b %d1,(%a1)+ | store user byte
|
| 384 |
|
|
subq.l #0x1,%d0 | are we through yet?
|
| 385 |
|
|
bne moreout | no; so, continue
|
| 386 |
|
|
rts
|
| 387 |
|
|
|
| 388 |
|
|
|
|
| 389 |
|
|
| int _copyin(user_addr, supervisor_addr, nbytes)
|
| 390 |
|
|
|
|
| 391 |
|
|
.global _copyin
|
| 392 |
|
|
_copyin:
|
| 393 |
|
|
move.l 4(%sp),%a0 | source
|
| 394 |
|
|
move.l 8(%sp),%a1 | destination
|
| 395 |
|
|
move.l 12(%sp),%d0 | count
|
| 396 |
|
|
morein:
|
| 397 |
|
|
movs.b (%a0)+,%d1 | fetch user byte
|
| 398 |
|
|
move.b %d1,(%a1)+ | write supervisor byte
|
| 399 |
|
|
subq.l #0x1,%d0 | are we through yet?
|
| 400 |
|
|
bne morein | no; so, continue
|
| 401 |
|
|
rts
|
| 402 |
|
|
|
| 403 |
|
|
|###########################################################################
|
| 404 |
|
|
|
| 405 |
|
|
|
|
| 406 |
|
|
| _060_real_trace():
|
| 407 |
|
|
|
|
| 408 |
|
|
| This is the exit point for the 060FPSP when an instruction is being traced
|
| 409 |
|
|
| and there are no other higher priority exceptions pending for this instruction
|
| 410 |
|
|
| or they have already been processed.
|
| 411 |
|
|
|
|
| 412 |
|
|
| The sample code below simply executes an "rte".
|
| 413 |
|
|
|
|
| 414 |
|
|
.global _060_real_trace
|
| 415 |
|
|
_060_real_trace:
|
| 416 |
|
|
rte
|
| 417 |
|
|
|
| 418 |
|
|
|
|
| 419 |
|
|
| _060_real_access():
|
| 420 |
|
|
|
|
| 421 |
|
|
| This is the exit point for the 060FPSP when an access error exception
|
| 422 |
|
|
| is encountered. The routine below should point to the operating system
|
| 423 |
|
|
| handler for access error exceptions. The exception stack frame is an
|
| 424 |
|
|
| 8-word access error frame.
|
| 425 |
|
|
|
|
| 426 |
|
|
| The sample routine below simply executes an "rte" instruction which
|
| 427 |
|
|
| is most likely the incorrect thing to do and could put the system
|
| 428 |
|
|
| into an infinite loop.
|
| 429 |
|
|
|
|
| 430 |
|
|
.global _060_real_access
|
| 431 |
|
|
_060_real_access:
|
| 432 |
|
|
rte
|
