netbsd060sp.S revision 1.2
1 # 2 # $NetBSD: netbsd060sp.S,v 1.2 1997/06/26 22:28:42 is Exp $ 3 # 4 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 5 # MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP 6 # M68000 Hi-Performance Microprocessor Division 7 # M68060 Software Package Production Release 8 # 9 # M68060 Software Package Copyright (C) 1993, 1994, 1995, 1996 Motorola Inc. 10 # All rights reserved. 11 # 12 # THE SOFTWARE is provided on an "AS IS" basis and without warranty. 13 # To the maximum extent permitted by applicable law, 14 # MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED, 15 # INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS 16 # FOR A PARTICULAR PURPOSE and any warranty against infringement with 17 # regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF) 18 # and any accompanying written materials. 19 # 20 # To the maximum extent permitted by applicable law, 21 # IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER 22 # (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, 23 # BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS) 24 # ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE. 25 # 26 # Motorola assumes no responsibility for the maintenance and support 27 # of the SOFTWARE. 28 # 29 # You are hereby granted a copyright license to use, modify, and distribute the 30 # SOFTWARE so long as this entire notice is retained without alteration 31 # in any modified and/or redistributed versions, and that such modified 32 # versions are clearly identified as such. 33 # No licenses are granted by implication, estoppel or otherwise under any 34 # patents or trademarks of Motorola, Inc. 35 #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 36 # 37 # Derived from: 38 # os.s 39 # 40 # This file contains: 41 # - example "Call-Out"s required by both the ISP and FPSP. 42 # 43 44 # 45 # make the copyright notice appear in the binary: 46 # 47 .include "copyright.S" 48 49 ################################# 50 # EXAMPLE CALL-OUTS # 51 # # 52 # _060_dmem_write() # 53 # _060_dmem_read() # 54 # _060_imem_read() # 55 # _060_dmem_read_byte() # 56 # _060_dmem_read_word() # 57 # _060_dmem_read_long() # 58 # _060_imem_read_word() # 59 # _060_imem_read_long() # 60 # _060_dmem_write_byte() # 61 # _060_dmem_write_word() # 62 # _060_dmem_write_long() # 63 # # 64 # _060_real_trace() # 65 # _060_real_access() # 66 ################################# 67 68 # 69 # Each IO routine checks to see if the memory write/read is to/from user 70 # or supervisor application space. The examples below use simple "move" 71 # instructions for supervisor mode applications and call _copyin()/_copyout() 72 # for user mode applications. 73 # When installing the 060SP, the _copyin()/_copyout() equivalents for a 74 # given operating system should be substituted. 75 # 76 # The addresses within the 060SP are guaranteed to be on the stack. 77 # The result is that Unix processes are allowed to sleep as a consequence 78 # of a page fault during a _copyout. 79 # 80 81 # 82 # _060_dmem_write(): 83 # 84 # Writes to data memory while in supervisor mode. 85 # 86 # INPUTS: 87 # a0 - supervisor source address 88 # a1 - user destination address 89 # d0 - number of bytes to write 90 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode 91 # OUTPUTS: 92 # d1 - 0 = success, !0 = failure 93 # 94 .global _060_dmem_write 95 _060_dmem_write: 96 btst #0x5,a6@(0x4) |# check for supervisor state 97 beqs user_write 98 super_write: 99 moveb a0@+,a1@+ |# copy 1 byte 100 subql #0x1,d0 |# decr byte counter 101 bnes super_write |# quit if ctr = 0 102 clrl d1 |# return success 103 rts 104 user_write: 105 movel d0,sp@- |# pass: counter 106 movel a1,sp@- |# pass: user dst 107 movel a0,sp@- |# pass: supervisor src 108 bsrl _copyout |# write byte to user mem 109 movel d0,d1 |# return success 110 addl #0xc,sp |# clear 3 lw params 111 rts 112 113 # 114 # _060_imem_read(), _060_dmem_read(): 115 # 116 # Reads from data/instruction memory while in supervisor mode. 117 # 118 # INPUTS: 119 # a0 - user source address 120 # a1 - supervisor destination address 121 # d0 - number of bytes to read 122 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode 123 # OUTPUTS: 124 # d1 - 0 = success, !0 = failure 125 # 126 .global _060_imem_read 127 .global _060_dmem_read 128 _060_imem_read: 129 _060_dmem_read: 130 btst #0x5,a6@(0x4) |# check for supervisor state 131 beqs user_read 132 super_read: 133 moveb a0@+,a1@+ |# copy 1 byte 134 subql #0x1,d0 |# decr byte counter 135 bnes super_read |# quit if ctr = 0 136 clrl d1 |# return success 137 rts 138 user_read: 139 movel d0,sp@- |# pass: counter 140 movel a1,sp@- |# pass: super dst 141 movel a0,sp@- |# pass: user src 142 bsrl _copyin |# read byte from user mem 143 movel d0,d1 |# return success 144 addl #0xc,sp |# clear 3 lw params 145 rts 146 147 # 148 # _060_dmem_read_byte(): 149 # 150 # Read a data byte from user memory. 151 # 152 # INPUTS: 153 # a0 - user source address 154 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode 155 # OUTPUTS: 156 # d0 - data byte in d0 157 # d1 - 0 = success, !0 = failure 158 # 159 .global _060_dmem_read_byte 160 _060_dmem_read_byte: 161 btst #0x5,a6@(0x4) |# check for supervisor state 162 bnes dmrbs |# supervisor 163 dmrbu: 164 clrl sp@- |# clear space on stack for result 165 movel #0x1,sp@- |# pass: # bytes to copy 166 pea sp@(0x7) |# pass: dst addr (stack) 167 movel a0,sp@- |# pass: src addr (user mem) 168 bsrl _copyin |# "copy in" the data 169 movel d0,d1 |# return success 170 addl #0xc,sp |# delete params 171 movel sp@+,d0 |# put answer in d0 172 rts 173 dmrbs: 174 clrl d0 |# clear whole longword 175 moveb a0@,d0 |# fetch super byte 176 clrl d1 |# return success 177 rts 178 179 # 180 # _060_imem_read_word(): 181 # Read an instruction word from user memory. 182 # 183 # _060_dmem_read_word(): 184 # Read a data word from user memory. 185 # 186 # INPUTS: 187 # a0 - user source address 188 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode 189 # OUTPUTS: 190 # d0 - data word in d0 191 # d1 - 0 = success, !0 = failure 192 # 193 .global _060_imem_read_word 194 .global _060_dmem_read_word 195 196 _060_imem_read_word: 197 _060_dmem_read_word: 198 btst #0x5,a6@(0x4) |# check for supervisor state 199 bnes dmrws |# supervisor 200 dmrwu: 201 clrl sp@- |# clear result space on stack 202 movel #0x2,sp@- |# pass: # bytes to copy 203 pea sp@(0x6) |# pass: dst addr (stack) 204 movel a0,sp@- |# pass: src addr (user mem) 205 bsrl _copyin |# "copy in" the data 206 movel d0,d1 |# return success 207 addl #0xc,sp |# delete params 208 movel sp@+,d0 |# put answer in d0 209 rts 210 dmrws: 211 clrl d0 |# clear whole longword 212 movew a0@,d0 |# fetch super word 213 clrl d1 |# return success 214 rts 215 216 # 217 # _060_imem_read_long(): 218 # Read an instruction longword from user memory. 219 # 220 # _060_dmem_read_long(): 221 # Read an data longword from user memory. 222 # 223 224 # 225 # INPUTS: 226 # a0 - user source address 227 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode 228 # OUTPUTS: 229 # d0 - data longword in d0 230 # d1 - 0 = success, !0 = failure 231 # 232 233 .global _060_dmem_read_long 234 .global _060_imem_read_long 235 236 _060_imem_read_long: 237 _060_dmem_read_long: 238 btst #0x5,a6@(0x4) |# check for supervisor state 239 bnes dmrls |# supervisor 240 dmrlu: 241 subql #0x4,sp |# clear result space on stack 242 movel #0x4,sp@- |# pass: # bytes to copy 243 pea sp@(0x4) |# pass: dst addr (stack) 244 movel a0,sp@- |# pass: src addr (user mem) 245 bsrl _copyin |# "copy in" the data 246 movel d0,d1 |# return success 247 addl #0xc,sp |# delete params 248 movel sp@+,d0 |# put answer in d0 249 rts 250 dmrls: 251 movel a0@,d0 |# fetch super longword 252 clrl d1 |# return success 253 rts 254 255 # 256 # _060_dmem_write_byte(): 257 # 258 # Write a data byte to user memory. 259 # 260 # INPUTS: 261 # a0 - user destination address 262 # d0 - data byte in d0 263 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode 264 # OUTPUTS: 265 # d1 - 0 = success, !0 = failure 266 # 267 .global _060_dmem_write_byte 268 _060_dmem_write_byte: 269 btst #0x5,a6@(0x4) |# check for supervisor state 270 bnes dmwbs |# supervisor 271 dmwbu: 272 movel d0,sp@- |# put src on stack 273 movel #0x1,sp@- |# pass: # bytes to copy 274 movel a0,sp@- |# pass: dst addr (user mem) 275 pea sp@(0xb) |# pass: src addr (stack) 276 bsrl _copyout |# "copy out" the data 277 movel d0,d1 |# return success 278 addl #0x10,sp |# delete params + src 279 rts 280 dmwbs: 281 moveb d0,a0@ |# store super byte 282 clrl d1 |# return success 283 rts 284 285 # 286 # _060_dmem_write_word(): 287 # 288 # Write a data word to user memory. 289 # 290 # INPUTS: 291 # a0 - user destination address 292 # d0 - data word in d0 293 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode 294 # OUTPUTS: 295 # d1 - 0 = success, !0 = failure 296 # 297 .global _060_dmem_write_word 298 _060_dmem_write_word: 299 btst #0x5,a6@(0x4) |# check for supervisor state 300 bnes dmwws |# supervisor 301 dmwwu: 302 movel d0,sp@- |# put src on stack 303 movel #0x2,sp@- |# pass: # bytes to copy 304 movel a0,sp@- |# pass: dst addr (user mem) 305 pea sp@(0xa) |# pass: src addr (stack) 306 bsrl _copyout |# "copy out" the data 307 movel d0,d1 |# return success 308 addl #0x10,sp |# delete params + src 309 rts 310 dmwws: 311 movew d0,a0@ |# store super word 312 clrl d1 |# return success 313 rts 314 315 # 316 # _060_dmem_write_long(): 317 # 318 # Write a data longword to user memory. 319 # 320 # INPUTS: 321 # a0 - user destination address 322 # d0 - data longword in d0 323 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode 324 # OUTPUTS: 325 # d1 - 0 = success, !0 = failure 326 # 327 .global _060_dmem_write_long 328 _060_dmem_write_long: 329 btst #0x5,a6@(0x4) |# check for supervisor state 330 bnes dmwls |# supervisor 331 dmwlu: 332 movel d0,sp@- |# put src on stack 333 movel #0x4,sp@- |# pass: # bytes to copy 334 movel a0,sp@- |# pass: dst addr (user mem) 335 pea sp@(0x8) |# pass: src addr (stack) 336 bsrl _copyout |# "copy out" the data 337 movel d0,d1 |# return success 338 addl #0x10,sp |# delete params + src 339 rts 340 dmwls: 341 movel d0,a0@ |# store super longword 342 clrl d1 |# return success 343 rts 344 345 ############################################################################ 346 347 # 348 # _060_real_trace(): 349 # 350 # This is the exit point for the 060FPSP when an instruction is being traced 351 # and there are no other higher priority exceptions pending for this instruction 352 # or they have already been processed. 353 # 354 # The sample code below simply executes an "rte". 355 # 356 .global _060_real_trace 357 _060_real_trace: 358 rte 359 360 # 361 # _060_real_access(): 362 # 363 # This is the exit point for the 060FPSP when an access error exception 364 # is encountered. The routine below should point to the operating system 365 # handler for access error exceptions. The exception stack frame is an 366 # 8-word access error frame. 367 # 368 # We jump directly to the 68060 buserr handler. 369 # If we had a sane ld, we could use use that entry point directly... 370 # 371 .globl _060_real_access,_buserr60 372 _060_real_access: 373 jra _buserr60 374 375 .include "inetbsd.S" 376 .include "fnetbsd.S" 377
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