crypto/sparccpuid.S

   1 #ifdef OPENSSL_FIPSCANISTER
   2 #include <openssl/fipssyms.h>
   3 #endif
   4
   5 #if defined(__SUNPRO_C) && defined(__sparcv9)
   6 # define ABI64  /* They've said -xarch=v9 at command line */
   7 #elif defined(__GNUC__) && defined(__arch64__)
   8 # define ABI64  /* They've said -m64 at command line */
   9 #endif
  10
  11 #ifdef ABI64
  12   .register     %g2,#scratch
  13   .register     %g3,#scratch
  14 # define        FRAME   -192
  15 # define        BIAS    2047
  16 #else
  17 # define        FRAME   -96
  18 # define        BIAS    0
  19 #endif
  20
  21 .text
  22 .align  32
  23 .global OPENSSL_wipe_cpu
  24 .type   OPENSSL_wipe_cpu,#function
  25 ! Keep in mind that this does not excuse us from wiping the stack!
  26 ! This routine wipes registers, but not the backing store [which
  27 ! resides on the stack, toward lower addresses]. To facilitate for
  28 ! stack wiping I return pointer to the top of stack of the *caller*.
  29 OPENSSL_wipe_cpu:
  30         save    %sp,FRAME,%sp
  31         nop
  32 #ifdef __sun
  33 #include <sys/trap.h>
  34         ta      ST_CLEAN_WINDOWS
  35 #else
  36         call    .walk.reg.wins
  37 #endif
  38         nop
  39         call    .PIC.zero.up
  40         mov     .zero-(.-4),%o0
  41         ld      [%o0],%f0
  42         ld      [%o0],%f1
  43
  44         subcc   %g0,1,%o0
  45         ! Following is V9 "rd %ccr,%o0" instruction. However! V8
  46         ! specification says that it ("rd %asr2,%o0" in V8 terms) does
  47         ! not cause illegal_instruction trap. It therefore can be used
  48         ! to determine if the CPU the code is executing on is V8- or
  49         ! V9-compliant, as V9 returns a distinct value of 0x99,
  50         ! "negative" and "borrow" bits set in both %icc and %xcc.
  51         .word   0x91408000      !rd     %ccr,%o0
  52         cmp     %o0,0x99
  53         bne     .v8
  54         nop
  55                         ! Even though we do not use %fp register bank,
  56                         ! we wipe it as memcpy might have used it...
  57                         .word   0xbfa00040      !fmovd  %f0,%f62
  58                         .word   0xbba00040      !...
  59                         .word   0xb7a00040
  60                         .word   0xb3a00040
  61                         .word   0xafa00040
  62                         .word   0xaba00040
  63                         .word   0xa7a00040
  64                         .word   0xa3a00040
  65                         .word   0x9fa00040
  66                         .word   0x9ba00040
  67                         .word   0x97a00040
  68                         .word   0x93a00040
  69                         .word   0x8fa00040
  70                         .word   0x8ba00040
  71                         .word   0x87a00040
  72                         .word   0x83a00040      !fmovd  %f0,%f32
  73 .v8:                    fmovs   %f1,%f31
  74         clr     %o0
  75                         fmovs   %f0,%f30
  76         clr     %o1
  77                         fmovs   %f1,%f29
  78         clr     %o2
  79                         fmovs   %f0,%f28
  80         clr     %o3
  81                         fmovs   %f1,%f27
  82         clr     %o4
  83                         fmovs   %f0,%f26
  84         clr     %o5
  85                         fmovs   %f1,%f25
  86         clr     %o7
  87                         fmovs   %f0,%f24
  88         clr     %l0
  89                         fmovs   %f1,%f23
  90         clr     %l1
  91                         fmovs   %f0,%f22
  92         clr     %l2
  93                         fmovs   %f1,%f21
  94         clr     %l3
  95                         fmovs   %f0,%f20
  96         clr     %l4
  97                         fmovs   %f1,%f19
  98         clr     %l5
  99                         fmovs   %f0,%f18
 100         clr     %l6
 101                         fmovs   %f1,%f17
 102         clr     %l7
 103                         fmovs   %f0,%f16
 104         clr     %i0
 105                         fmovs   %f1,%f15
 106         clr     %i1
 107                         fmovs   %f0,%f14
 108         clr     %i2
 109                         fmovs   %f1,%f13
 110         clr     %i3
 111                         fmovs   %f0,%f12
 112         clr     %i4
 113                         fmovs   %f1,%f11
 114         clr     %i5
 115                         fmovs   %f0,%f10
 116         clr     %g1
 117                         fmovs   %f1,%f9
 118         clr     %g2
 119                         fmovs   %f0,%f8
 120         clr     %g3
 121                         fmovs   %f1,%f7
 122         clr     %g4
 123                         fmovs   %f0,%f6
 124         clr     %g5
 125                         fmovs   %f1,%f5
 126                         fmovs   %f0,%f4
 127                         fmovs   %f1,%f3
 128                         fmovs   %f0,%f2
 129
 130         add     %fp,BIAS,%i0    ! return pointer to caller´s top of stack
 131
 132         ret
 133         restore
 134
 135 .zero:  .long   0x0,0x0
 136 .PIC.zero.up:
 137         retl
 138         add     %o0,%o7,%o0
 139 #ifdef DEBUG
 140 .global walk_reg_wins
 141 .type   walk_reg_wins,#function
 142 walk_reg_wins:
 143 #endif
 144 .walk.reg.wins:
 145         save    %sp,FRAME,%sp
 146         cmp     %i7,%o7
 147         be      2f
 148         clr     %o0
 149         cmp     %o7,0   ! compiler never cleans %o7...
 150         be      1f      ! could have been a leaf function...
 151         clr     %o1
 152         call    .walk.reg.wins
 153         nop
 154 1:      clr     %o2
 155         clr     %o3
 156         clr     %o4
 157         clr     %o5
 158         clr     %o7
 159         clr     %l0
 160         clr     %l1
 161         clr     %l2
 162         clr     %l3
 163         clr     %l4
 164         clr     %l5
 165         clr     %l6
 166         clr     %l7
 167         add     %o0,1,%i0       ! used for debugging
 168 2:      ret
 169         restore
 170 .size   OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
 171
 172 .global OPENSSL_atomic_add
 173 .type   OPENSSL_atomic_add,#function
 174 .align  32
 175 OPENSSL_atomic_add:
 176 #ifndef ABI64
 177         subcc   %g0,1,%o2
 178         .word   0x95408000      !rd     %ccr,%o2, see comment above
 179         cmp     %o2,0x99
 180         be      .v9
 181         nop
 182         save    %sp,FRAME,%sp
 183         ba      .enter
 184         nop
 185 #ifdef __sun
 186 ! Note that you do not have to link with libthread to call thr_yield,
 187 ! as libc provides a stub, which is overloaded the moment you link
 188 ! with *either* libpthread or libthread...
 189 #define YIELD_CPU       thr_yield
 190 #else
 191 ! applies at least to Linux and FreeBSD... Feedback expected...
 192 #define YIELD_CPU       sched_yield
 193 #endif
 194 .spin:  call    YIELD_CPU
 195         nop
 196 .enter: ld      [%i0],%i2
 197         cmp     %i2,-4096
 198         be      .spin
 199         mov     -1,%i2
 200         swap    [%i0],%i2
 201         cmp     %i2,-1
 202         be      .spin
 203         add     %i2,%i1,%i2
 204         stbar
 205         st      %i2,[%i0]
 206         sra     %i2,%g0,%i0
 207         ret
 208         restore
 209 .v9:
 210 #endif
 211         ld      [%o0],%o2
 212 1:      add     %o1,%o2,%o3
 213         .word   0xd7e2100a      !cas [%o0],%o2,%o3, compare [%o0] with %o2 and swap %o3
 214         cmp     %o2,%o3
 215         bne     1b
 216         mov     %o3,%o2         ! cas is always fetching to dest. register
 217         add     %o1,%o2,%o0     ! OpenSSL expects the new value
 218         retl
 219         sra     %o0,%g0,%o0     ! we return signed int, remember?
 220 .size   OPENSSL_atomic_add,.-OPENSSL_atomic_add
 221
 222 .global _sparcv9_rdtick
 223 .align  32
 224 _sparcv9_rdtick:
 225         subcc   %g0,1,%o0
 226         .word   0x91408000      !rd     %ccr,%o0
 227         cmp     %o0,0x99
 228         bne     .notick
 229         xor     %o0,%o0,%o0
 230         .word   0x91410000      !rd     %tick,%o0
 231         retl
 232         .word   0x93323020      !srlx   %o0,32,%o1
 233 .notick:
 234         retl
 235         xor     %o1,%o1,%o1
 236 .type   _sparcv9_rdtick,#function
 237 .size   _sparcv9_rdtick,.-_sparcv9_rdtick
 238
 239 .global _sparcv9_vis1_probe
 240 .align  8
 241 _sparcv9_vis1_probe:
 242         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 243         add     %sp,BIAS+2,%o1
 244         retl
 245         .word   0xc19a5a40      !ldda   [%o1]ASI_FP16_P,%f0
 246 .type   _sparcv9_vis1_probe,#function
 247 .size   _sparcv9_vis1_probe,.-_sparcv9_vis1_probe
 248
 249 ! Probe and instrument VIS1 instruction. Output is number of cycles it
 250 ! takes to execute rdtick and pair of VIS1 instructions. US-Tx VIS unit
 251 ! is slow (documented to be 6 cycles on T2) and the core is in-order
 252 ! single-issue, it should be possible to distinguish Tx reliably...
 253 ! Observed return values are:
 254 !
 255 !       UltraSPARC IIe          7
 256 !       UltraSPARC III          7
 257 !       UltraSPARC T1           24
 258 !       SPARC T4                65(*)
 259 !
 260 ! (*)   result has lesser to do with VIS instruction latencies, rdtick
 261 !       appears that slow, but it does the trick in sense that FP and
 262 !       VIS code paths are still slower than integer-only ones.
 263 !
 264 ! Numbers for T2 and SPARC64 V-VII are more than welcomed.
 265 !
 266 ! It would be possible to detect specifically US-T1 by instrumenting
 267 ! fmul8ulx16, which is emulated on T1 and as such accounts for quite
 268 ! a lot of %tick-s, couple of thousand on Linux...
 269 .global _sparcv9_vis1_instrument
 270 .align  8
 271 _sparcv9_vis1_instrument:
 272         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 273         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 274         .word   0x91410000      !rd     %tick,%o0
 275         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 276         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 277         .word   0x93410000      !rd     %tick,%o1
 278         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 279         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 280         .word   0x95410000      !rd     %tick,%o2
 281         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 282         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 283         .word   0x97410000      !rd     %tick,%o3
 284         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 285         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 286         .word   0x99410000      !rd     %tick,%o4
 287
 288         ! calculate intervals
 289         sub     %o1,%o0,%o0
 290         sub     %o2,%o1,%o1
 291         sub     %o3,%o2,%o2
 292         sub     %o4,%o3,%o3
 293
 294         ! find minumum value
 295         cmp     %o0,%o1
 296         .word   0x38680002      !bgu,a  %xcc,.+8
 297         mov     %o1,%o0
 298         cmp     %o0,%o2
 299         .word   0x38680002      !bgu,a  %xcc,.+8
 300         mov     %o2,%o0
 301         cmp     %o0,%o3
 302         .word   0x38680002      !bgu,a  %xcc,.+8
 303         mov     %o3,%o0
 304
 305         retl
 306         nop
 307 .type   _sparcv9_vis1_instrument,#function
 308 .size   _sparcv9_vis1_instrument,.-_sparcv9_vis1_instrument
 309
 310 .global _sparcv9_vis2_probe
 311 .align  8
 312 _sparcv9_vis2_probe:
 313         retl
 314         .word   0x81b00980      !bshuffle       %f0,%f0,%f0
 315 .type   _sparcv9_vis2_probe,#function
 316 .size   _sparcv9_vis2_probe,.-_sparcv9_vis2_probe
 317
 318 .global _sparcv9_fmadd_probe
 319 .align  8
 320 _sparcv9_fmadd_probe:
 321         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 322         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 323         retl
 324         .word   0x81b80440      !fmaddd %f0,%f0,%f2,%f0
 325 .type   _sparcv9_fmadd_probe,#function
 326 .size   _sparcv9_fmadd_probe,.-_sparcv9_fmadd_probe
 327
 328 .global _sparcv9_rdcfr
 329 .align  8
 330 _sparcv9_rdcfr:
 331         retl
 332         .word   0x91468000      !rd     %asr26,%o0
 333 .type   _sparcv9_rdcfr,#function
 334 .size   _sparcv9_rdcfr,.-_sparcv9_rdcfr
 335
 336 .global _sparcv9_vis3_probe
 337 .align  8
 338 _sparcv9_vis3_probe:
 339         retl
 340         .word   0x81b022a0      !xmulx  %g0,%g0,%g0
 341 .type   _sparcv9_vis3_probe,#function
 342 .size   _sparcv9_vis3_probe,.-_sparcv9_vis3_probe
 343
 344 .global _sparcv9_random
 345 .align  8
 346 _sparcv9_random:
 347         retl
 348         .word   0x91b002a0      !random %o0
 349 .type   _sparcv9_random,#function
 350 .size   _sparcv9_random,.-_sparcv9_vis3_probe
 351
 352 .global OPENSSL_cleanse
 353 .align  32
 354 OPENSSL_cleanse:
 355         cmp     %o1,14
 356         nop
 357 #ifdef ABI64
 358         bgu     %xcc,.Lot
 359 #else
 360         bgu     .Lot
 361 #endif
 362         cmp     %o1,0
 363         bne     .Little
 364         nop
 365         retl
 366         nop
 367
 368 .Little:
 369         stb     %g0,[%o0]
 370         subcc   %o1,1,%o1
 371         bnz     .Little
 372         add     %o0,1,%o0
 373         retl
 374         nop
 375 .align  32
 376 .Lot:
 377 #ifndef ABI64
 378         subcc   %g0,1,%g1
 379         ! see above for explanation
 380         .word   0x83408000      !rd     %ccr,%g1
 381         cmp     %g1,0x99
 382         bne     .v8lot
 383         nop
 384 #endif
 385
 386 .v9lot: andcc   %o0,7,%g0
 387         bz      .v9aligned
 388         nop
 389         stb     %g0,[%o0]
 390         sub     %o1,1,%o1
 391         ba      .v9lot
 392         add     %o0,1,%o0
 393 .align  16,0x01000000
 394 .v9aligned:
 395         .word   0xc0720000      !stx    %g0,[%o0]
 396         sub     %o1,8,%o1
 397         andcc   %o1,-8,%g0
 398 #ifdef ABI64
 399         .word   0x126ffffd      !bnz    %xcc,.v9aligned
 400 #else
 401         .word   0x124ffffd      !bnz    %icc,.v9aligned
 402 #endif
 403         add     %o0,8,%o0
 404
 405         cmp     %o1,0
 406         bne     .Little
 407         nop
 408         retl
 409         nop
 410 #ifndef ABI64
 411 .v8lot: andcc   %o0,3,%g0
 412         bz      .v8aligned
 413         nop
 414         stb     %g0,[%o0]
 415         sub     %o1,1,%o1
 416         ba      .v8lot
 417         add     %o0,1,%o0
 418         nop
 419 .v8aligned:
 420         st      %g0,[%o0]
 421         sub     %o1,4,%o1
 422         andcc   %o1,-4,%g0
 423         bnz     .v8aligned
 424         add     %o0,4,%o0
 425
 426         cmp     %o1,0
 427         bne     .Little
 428         nop
 429         retl
 430         nop
 431 #endif
 432 .type   OPENSSL_cleanse,#function
 433 .size   OPENSSL_cleanse,.-OPENSSL_cleanse
 434
 435 .global _sparcv9_vis1_instrument_bus
 436 .align  8
 437 _sparcv9_vis1_instrument_bus:
 438         mov     %o1,%o3                                 ! save cnt
 439         .word   0x99410000      !rd     %tick,%o4       ! tick
 440         mov     %o4,%o5                                 ! lasttick = tick
 441         set     0,%g4                                   ! diff
 442
 443         andn    %o0,63,%g1
 444         .word   0xc1985e00      !ldda   [%g1]0xf0,%f0   ! block load
 445         .word   0x8143e040      !membar #Sync
 446         .word   0xc1b85c00      !stda   %f0,[%g1]0xe0   ! block store and commit
 447         .word   0x8143e040      !membar #Sync
 448         ld      [%o0],%o4
 449         add     %o4,%g4,%g4
 450         .word   0xc9e2100c      !cas    [%o0],%o4,%g4
 451
 452 .Loop:  .word   0x99410000      !rd     %tick,%o4
 453         sub     %o4,%o5,%g4                             ! diff=tick-lasttick
 454         mov     %o4,%o5                                 ! lasttick=tick
 455
 456         andn    %o0,63,%g1
 457         .word   0xc1985e00      !ldda   [%g1]0xf0,%f0   ! block load
 458         .word   0x8143e040      !membar #Sync
 459         .word   0xc1b85c00      !stda   %f0,[%g1]0xe0   ! block store and commit
 460         .word   0x8143e040      !membar #Sync
 461         ld      [%o0],%o4
 462         add     %o4,%g4,%g4
 463         .word   0xc9e2100c      !cas    [%o0],%o4,%g4
 464         subcc   %o1,1,%o1                               ! --$cnt
 465         bnz     .Loop
 466         add     %o0,4,%o0                               ! ++$out
 467
 468         retl
 469         mov     %o3,%o0
 470 .type   _sparcv9_vis1_instrument_bus,#function
 471 .size   _sparcv9_vis1_instrument_bus,.-_sparcv9_vis1_instrument_bus
 472
 473 .global _sparcv9_vis1_instrument_bus2
 474 .align  8
 475 _sparcv9_vis1_instrument_bus2:
 476         mov     %o1,%o3                                 ! save cnt
 477         sll     %o1,2,%o1                               ! cnt*=4
 478
 479         .word   0x99410000      !rd     %tick,%o4       ! tick
 480         mov     %o4,%o5                                 ! lasttick = tick
 481         set     0,%g4                                   ! diff
 482
 483         andn    %o0,63,%g1
 484         .word   0xc1985e00      !ldda   [%g1]0xf0,%f0   ! block load
 485         .word   0x8143e040      !membar #Sync
 486         .word   0xc1b85c00      !stda   %f0,[%g1]0xe0   ! block store and commit
 487         .word   0x8143e040      !membar #Sync
 488         ld      [%o0],%o4
 489         add     %o4,%g4,%g4
 490         .word   0xc9e2100c      !cas    [%o0],%o4,%g4
 491
 492         .word   0x99410000      !rd     %tick,%o4       ! tick
 493         sub     %o4,%o5,%g4                             ! diff=tick-lasttick
 494         mov     %o4,%o5                                 ! lasttick=tick
 495         mov     %g4,%g5                                 ! lastdiff=diff
 496 .Loop2:
 497         andn    %o0,63,%g1
 498         .word   0xc1985e00      !ldda   [%g1]0xf0,%f0   ! block load
 499         .word   0x8143e040      !membar #Sync
 500         .word   0xc1b85c00      !stda   %f0,[%g1]0xe0   ! block store and commit
 501         .word   0x8143e040      !membar #Sync
 502         ld      [%o0],%o4
 503         add     %o4,%g4,%g4
 504         .word   0xc9e2100c      !cas    [%o0],%o4,%g4
 505
 506         subcc   %o2,1,%o2                               ! --max
 507         bz      .Ldone2
 508         nop
 509
 510         .word   0x99410000      !rd     %tick,%o4       ! tick
 511         sub     %o4,%o5,%g4                             ! diff=tick-lasttick
 512         mov     %o4,%o5                                 ! lasttick=tick
 513         cmp     %g4,%g5
 514         mov     %g4,%g5                                 ! lastdiff=diff
 515
 516         .word   0x83408000      !rd     %ccr,%g1
 517         and     %g1,4,%g1                               ! isolate zero flag
 518         xor     %g1,4,%g1                               ! flip zero flag
 519
 520         subcc   %o1,%g1,%o1                             ! conditional --$cnt
 521         bnz     .Loop2
 522         add     %o0,%g1,%o0                             ! conditional ++$out
 523
 524 .Ldone2:
 525         srl     %o1,2,%o1
 526         retl
 527         sub     %o3,%o1,%o0
 528 .type   _sparcv9_vis1_instrument_bus2,#function
 529 .size   _sparcv9_vis1_instrument_bus2,.-_sparcv9_vis1_instrument_bus2
 530
 531 .section        ".init",#alloc,#execinstr
 532         call    OPENSSL_cpuid_setup
 533         nop