crypto/sparccpuid.S

   1 ! Copyright 2005-2016 The OpenSSL Project Authors. All Rights Reserved.
   2 !
   3 ! Licensed under the OpenSSL license (the "License").  You may not use
   4 ! this file except in compliance with the License.  You can obtain a copy
   5 ! in the file LICENSE in the source distribution or at
   6 ! https://www.openssl.org/source/license.html
   7
   8 #ifdef OPENSSL_FIPSCANISTER
   9 #include <openssl/fipssyms.h>
  10 #endif
  11
  12 #if defined(__SUNPRO_C) && defined(__sparcv9)
  13 # define ABI64  /* They've said -xarch=v9 at command line */
  14 #elif defined(__GNUC__) && defined(__arch64__)
  15 # define ABI64  /* They've said -m64 at command line */
  16 #endif
  17
  18 #ifdef ABI64
  19   .register     %g2,#scratch
  20   .register     %g3,#scratch
  21 # define        FRAME   -192
  22 # define        BIAS    2047
  23 #else
  24 # define        FRAME   -96
  25 # define        BIAS    0
  26 #endif
  27
  28 .text
  29 .align  32
  30 .global OPENSSL_wipe_cpu
  31 .type   OPENSSL_wipe_cpu,#function
  32 ! Keep in mind that this does not excuse us from wiping the stack!
  33 ! This routine wipes registers, but not the backing store [which
  34 ! resides on the stack, toward lower addresses]. To facilitate for
  35 ! stack wiping I return pointer to the top of stack of the *caller*.
  36 OPENSSL_wipe_cpu:
  37         save    %sp,FRAME,%sp
  38         nop
  39 #ifdef __sun
  40 #include <sys/trap.h>
  41         ta      ST_CLEAN_WINDOWS
  42 #else
  43         call    .walk.reg.wins
  44 #endif
  45         nop
  46         call    .PIC.zero.up
  47         mov     .zero-(.-4),%o0
  48         ld      [%o0],%f0
  49         ld      [%o0],%f1
  50
  51         subcc   %g0,1,%o0
  52         ! Following is V9 "rd %ccr,%o0" instruction. However! V8
  53         ! specification says that it ("rd %asr2,%o0" in V8 terms) does
  54         ! not cause illegal_instruction trap. It therefore can be used
  55         ! to determine if the CPU the code is executing on is V8- or
  56         ! V9-compliant, as V9 returns a distinct value of 0x99,
  57         ! "negative" and "borrow" bits set in both %icc and %xcc.
  58         .word   0x91408000      !rd     %ccr,%o0
  59         cmp     %o0,0x99
  60         bne     .v8
  61         nop
  62                         ! Even though we do not use %fp register bank,
  63                         ! we wipe it as memcpy might have used it...
  64                         .word   0xbfa00040      !fmovd  %f0,%f62
  65                         .word   0xbba00040      !...
  66                         .word   0xb7a00040
  67                         .word   0xb3a00040
  68                         .word   0xafa00040
  69                         .word   0xaba00040
  70                         .word   0xa7a00040
  71                         .word   0xa3a00040
  72                         .word   0x9fa00040
  73                         .word   0x9ba00040
  74                         .word   0x97a00040
  75                         .word   0x93a00040
  76                         .word   0x8fa00040
  77                         .word   0x8ba00040
  78                         .word   0x87a00040
  79                         .word   0x83a00040      !fmovd  %f0,%f32
  80 .v8:                    fmovs   %f1,%f31
  81         clr     %o0
  82                         fmovs   %f0,%f30
  83         clr     %o1
  84                         fmovs   %f1,%f29
  85         clr     %o2
  86                         fmovs   %f0,%f28
  87         clr     %o3
  88                         fmovs   %f1,%f27
  89         clr     %o4
  90                         fmovs   %f0,%f26
  91         clr     %o5
  92                         fmovs   %f1,%f25
  93         clr     %o7
  94                         fmovs   %f0,%f24
  95         clr     %l0
  96                         fmovs   %f1,%f23
  97         clr     %l1
  98                         fmovs   %f0,%f22
  99         clr     %l2
 100                         fmovs   %f1,%f21
 101         clr     %l3
 102                         fmovs   %f0,%f20
 103         clr     %l4
 104                         fmovs   %f1,%f19
 105         clr     %l5
 106                         fmovs   %f0,%f18
 107         clr     %l6
 108                         fmovs   %f1,%f17
 109         clr     %l7
 110                         fmovs   %f0,%f16
 111         clr     %i0
 112                         fmovs   %f1,%f15
 113         clr     %i1
 114                         fmovs   %f0,%f14
 115         clr     %i2
 116                         fmovs   %f1,%f13
 117         clr     %i3
 118                         fmovs   %f0,%f12
 119         clr     %i4
 120                         fmovs   %f1,%f11
 121         clr     %i5
 122                         fmovs   %f0,%f10
 123         clr     %g1
 124                         fmovs   %f1,%f9
 125         clr     %g2
 126                         fmovs   %f0,%f8
 127         clr     %g3
 128                         fmovs   %f1,%f7
 129         clr     %g4
 130                         fmovs   %f0,%f6
 131         clr     %g5
 132                         fmovs   %f1,%f5
 133                         fmovs   %f0,%f4
 134                         fmovs   %f1,%f3
 135                         fmovs   %f0,%f2
 136
 137         add     %fp,BIAS,%i0    ! return pointer to caller´s top of stack
 138
 139         ret
 140         restore
 141
 142 .zero:  .long   0x0,0x0
 143 .PIC.zero.up:
 144         retl
 145         add     %o0,%o7,%o0
 146 #ifdef DEBUG
 147 .global walk_reg_wins
 148 .type   walk_reg_wins,#function
 149 walk_reg_wins:
 150 #endif
 151 .walk.reg.wins:
 152         save    %sp,FRAME,%sp
 153         cmp     %i7,%o7
 154         be      2f
 155         clr     %o0
 156         cmp     %o7,0   ! compiler never cleans %o7...
 157         be      1f      ! could have been a leaf function...
 158         clr     %o1
 159         call    .walk.reg.wins
 160         nop
 161 1:      clr     %o2
 162         clr     %o3
 163         clr     %o4
 164         clr     %o5
 165         clr     %o7
 166         clr     %l0
 167         clr     %l1
 168         clr     %l2
 169         clr     %l3
 170         clr     %l4
 171         clr     %l5
 172         clr     %l6
 173         clr     %l7
 174         add     %o0,1,%i0       ! used for debugging
 175 2:      ret
 176         restore
 177 .size   OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
 178
 179 .global OPENSSL_atomic_add
 180 .type   OPENSSL_atomic_add,#function
 181 .align  32
 182 OPENSSL_atomic_add:
 183 #ifndef ABI64
 184         subcc   %g0,1,%o2
 185         .word   0x95408000      !rd     %ccr,%o2, see comment above
 186         cmp     %o2,0x99
 187         be      .v9
 188         nop
 189         save    %sp,FRAME,%sp
 190         ba      .enter
 191         nop
 192 #ifdef __sun
 193 ! Note that you do not have to link with libthread to call thr_yield,
 194 ! as libc provides a stub, which is overloaded the moment you link
 195 ! with *either* libpthread or libthread...
 196 #define YIELD_CPU       thr_yield
 197 #else
 198 ! applies at least to Linux and FreeBSD... Feedback expected...
 199 #define YIELD_CPU       sched_yield
 200 #endif
 201 .spin:  call    YIELD_CPU
 202         nop
 203 .enter: ld      [%i0],%i2
 204         cmp     %i2,-4096
 205         be      .spin
 206         mov     -1,%i2
 207         swap    [%i0],%i2
 208         cmp     %i2,-1
 209         be      .spin
 210         add     %i2,%i1,%i2
 211         stbar
 212         st      %i2,[%i0]
 213         sra     %i2,%g0,%i0
 214         ret
 215         restore
 216 .v9:
 217 #endif
 218         ld      [%o0],%o2
 219 1:      add     %o1,%o2,%o3
 220         .word   0xd7e2100a      !cas [%o0],%o2,%o3, compare [%o0] with %o2 and swap %o3
 221         cmp     %o2,%o3
 222         bne     1b
 223         mov     %o3,%o2         ! cas is always fetching to dest. register
 224         add     %o1,%o2,%o0     ! OpenSSL expects the new value
 225         retl
 226         sra     %o0,%g0,%o0     ! we return signed int, remember?
 227 .size   OPENSSL_atomic_add,.-OPENSSL_atomic_add
 228
 229 .global _sparcv9_rdtick
 230 .align  32
 231 _sparcv9_rdtick:
 232         subcc   %g0,1,%o0
 233         .word   0x91408000      !rd     %ccr,%o0
 234         cmp     %o0,0x99
 235         bne     .notick
 236         xor     %o0,%o0,%o0
 237         .word   0x91410000      !rd     %tick,%o0
 238         retl
 239         .word   0x93323020      !srlx   %o0,32,%o1
 240 .notick:
 241         retl
 242         xor     %o1,%o1,%o1
 243 .type   _sparcv9_rdtick,#function
 244 .size   _sparcv9_rdtick,.-_sparcv9_rdtick
 245
 246 .global _sparcv9_vis1_probe
 247 .align  8
 248 _sparcv9_vis1_probe:
 249         add     %sp,BIAS+2,%o1
 250         .word   0xc19a5a40      !ldda   [%o1]ASI_FP16_P,%f0
 251         retl
 252         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 253 .type   _sparcv9_vis1_probe,#function
 254 .size   _sparcv9_vis1_probe,.-_sparcv9_vis1_probe
 255
 256 ! Probe and instrument VIS1 instruction. Output is number of cycles it
 257 ! takes to execute rdtick and pair of VIS1 instructions. US-Tx VIS unit
 258 ! is slow (documented to be 6 cycles on T2) and the core is in-order
 259 ! single-issue, it should be possible to distinguish Tx reliably...
 260 ! Observed return values are:
 261 !
 262 !       UltraSPARC IIe          7
 263 !       UltraSPARC III          7
 264 !       UltraSPARC T1           24
 265 !       SPARC T4                65(*)
 266 !
 267 ! (*)   result has lesser to do with VIS instruction latencies, rdtick
 268 !       appears that slow, but it does the trick in sense that FP and
 269 !       VIS code paths are still slower than integer-only ones.
 270 !
 271 ! Numbers for T2 and SPARC64 V-VII are more than welcomed.
 272 !
 273 ! It would be possible to detect specifically US-T1 by instrumenting
 274 ! fmul8ulx16, which is emulated on T1 and as such accounts for quite
 275 ! a lot of %tick-s, couple of thousand on Linux...
 276 .global _sparcv9_vis1_instrument
 277 .align  8
 278 _sparcv9_vis1_instrument:
 279         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 280         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 281         .word   0x91410000      !rd     %tick,%o0
 282         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 283         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 284         .word   0x93410000      !rd     %tick,%o1
 285         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 286         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 287         .word   0x95410000      !rd     %tick,%o2
 288         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 289         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 290         .word   0x97410000      !rd     %tick,%o3
 291         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 292         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 293         .word   0x99410000      !rd     %tick,%o4
 294
 295         ! calculate intervals
 296         sub     %o1,%o0,%o0
 297         sub     %o2,%o1,%o1
 298         sub     %o3,%o2,%o2
 299         sub     %o4,%o3,%o3
 300
 301         ! find minimum value
 302         cmp     %o0,%o1
 303         .word   0x38680002      !bgu,a  %xcc,.+8
 304         mov     %o1,%o0
 305         cmp     %o0,%o2
 306         .word   0x38680002      !bgu,a  %xcc,.+8
 307         mov     %o2,%o0
 308         cmp     %o0,%o3
 309         .word   0x38680002      !bgu,a  %xcc,.+8
 310         mov     %o3,%o0
 311
 312         retl
 313         nop
 314 .type   _sparcv9_vis1_instrument,#function
 315 .size   _sparcv9_vis1_instrument,.-_sparcv9_vis1_instrument
 316
 317 .global _sparcv9_vis2_probe
 318 .align  8
 319 _sparcv9_vis2_probe:
 320         retl
 321         .word   0x81b00980      !bshuffle       %f0,%f0,%f0
 322 .type   _sparcv9_vis2_probe,#function
 323 .size   _sparcv9_vis2_probe,.-_sparcv9_vis2_probe
 324
 325 .global _sparcv9_fmadd_probe
 326 .align  8
 327 _sparcv9_fmadd_probe:
 328         .word   0x81b00d80      !fxor   %f0,%f0,%f0
 329         .word   0x85b08d82      !fxor   %f2,%f2,%f2
 330         retl
 331         .word   0x81b80440      !fmaddd %f0,%f0,%f2,%f0
 332 .type   _sparcv9_fmadd_probe,#function
 333 .size   _sparcv9_fmadd_probe,.-_sparcv9_fmadd_probe
 334
 335 .global _sparcv9_rdcfr
 336 .align  8
 337 _sparcv9_rdcfr:
 338         retl
 339         .word   0x91468000      !rd     %asr26,%o0
 340 .type   _sparcv9_rdcfr,#function
 341 .size   _sparcv9_rdcfr,.-_sparcv9_rdcfr
 342
 343 .global _sparcv9_vis3_probe
 344 .align  8
 345 _sparcv9_vis3_probe:
 346         retl
 347         .word   0x81b022a0      !xmulx  %g0,%g0,%g0
 348 .type   _sparcv9_vis3_probe,#function
 349 .size   _sparcv9_vis3_probe,.-_sparcv9_vis3_probe
 350
 351 .global _sparcv9_random
 352 .align  8
 353 _sparcv9_random:
 354         retl
 355         .word   0x91b002a0      !random %o0
 356 .type   _sparcv9_random,#function
 357 .size   _sparcv9_random,.-_sparcv9_vis3_probe
 358
 359 .global _sparcv9_fjaesx_probe
 360 .align  8
 361 _sparcv9_fjaesx_probe:
 362         .word   0x81b09206      !faesencx %f2,%f6,%f0
 363         retl
 364         nop
 365 .size   _sparcv9_fjaesx_probe,.-_sparcv9_fjaesx_probe
 366
 367 .global OPENSSL_cleanse
 368 .align  32
 369 OPENSSL_cleanse:
 370         cmp     %o1,14
 371         nop
 372 #ifdef ABI64
 373         bgu     %xcc,.Lot
 374 #else
 375         bgu     .Lot
 376 #endif
 377         cmp     %o1,0
 378         bne     .Little
 379         nop
 380         retl
 381         nop
 382
 383 .Little:
 384         stb     %g0,[%o0]
 385         subcc   %o1,1,%o1
 386         bnz     .Little
 387         add     %o0,1,%o0
 388         retl
 389         nop
 390 .align  32
 391 .Lot:
 392 #ifndef ABI64
 393         subcc   %g0,1,%g1
 394         ! see above for explanation
 395         .word   0x83408000      !rd     %ccr,%g1
 396         cmp     %g1,0x99
 397         bne     .v8lot
 398         nop
 399 #endif
 400
 401 .v9lot: andcc   %o0,7,%g0
 402         bz      .v9aligned
 403         nop
 404         stb     %g0,[%o0]
 405         sub     %o1,1,%o1
 406         ba      .v9lot
 407         add     %o0,1,%o0
 408 .align  16,0x01000000
 409 .v9aligned:
 410         .word   0xc0720000      !stx    %g0,[%o0]
 411         sub     %o1,8,%o1
 412         andcc   %o1,-8,%g0
 413 #ifdef ABI64
 414         .word   0x126ffffd      !bnz    %xcc,.v9aligned
 415 #else
 416         .word   0x124ffffd      !bnz    %icc,.v9aligned
 417 #endif
 418         add     %o0,8,%o0
 419
 420         cmp     %o1,0
 421         bne     .Little
 422         nop
 423         retl
 424         nop
 425 #ifndef ABI64
 426 .v8lot: andcc   %o0,3,%g0
 427         bz      .v8aligned
 428         nop
 429         stb     %g0,[%o0]
 430         sub     %o1,1,%o1
 431         ba      .v8lot
 432         add     %o0,1,%o0
 433         nop
 434 .v8aligned:
 435         st      %g0,[%o0]
 436         sub     %o1,4,%o1
 437         andcc   %o1,-4,%g0
 438         bnz     .v8aligned
 439         add     %o0,4,%o0
 440
 441         cmp     %o1,0
 442         bne     .Little
 443         nop
 444         retl
 445         nop
 446 #endif
 447 .type   OPENSSL_cleanse,#function
 448 .size   OPENSSL_cleanse,.-OPENSSL_cleanse
 449
 450 .global CRYPTO_memcmp
 451 .align  16
 452 CRYPTO_memcmp:
 453         cmp     %o2,0
 454 #ifdef ABI64
 455         beq,pn  %xcc,.Lno_data
 456 #else
 457         beq     .Lno_data
 458 #endif
 459         xor     %g1,%g1,%g1
 460         nop
 461
 462 .Loop_cmp:
 463         ldub    [%o0],%o3
 464         add     %o0,1,%o0
 465         ldub    [%o1],%o4
 466         add     %o1,1,%o1
 467         subcc   %o2,1,%o2
 468         xor     %o3,%o4,%o4
 469 #ifdef ABI64
 470         bnz     %xcc,.Loop_cmp
 471 #else
 472         bnz     .Loop_cmp
 473 #endif
 474         or      %o4,%g1,%g1
 475
 476         sub     %g0,%g1,%g1
 477         srl     %g1,31,%g1
 478 .Lno_data:
 479         retl
 480         mov     %g1,%o0
 481 .type   CRYPTO_memcmp,#function
 482 .size   CRYPTO_memcmp,.-CRYPTO_memcmp
 483
 484 .global _sparcv9_vis1_instrument_bus
 485 .align  8
 486 _sparcv9_vis1_instrument_bus:
 487         mov     %o1,%o3                                 ! save cnt
 488         .word   0x99410000      !rd     %tick,%o4       ! tick
 489         mov     %o4,%o5                                 ! lasttick = tick
 490         set     0,%g4                                   ! diff
 491
 492         andn    %o0,63,%g1
 493         .word   0xc1985e00      !ldda   [%g1]0xf0,%f0   ! block load
 494         .word   0x8143e040      !membar #Sync
 495         .word   0xc1b85c00      !stda   %f0,[%g1]0xe0   ! block store and commit
 496         .word   0x8143e040      !membar #Sync
 497         ld      [%o0],%o4
 498         add     %o4,%g4,%g4
 499         .word   0xc9e2100c      !cas    [%o0],%o4,%g4
 500
 501 .Loop:  .word   0x99410000      !rd     %tick,%o4
 502         sub     %o4,%o5,%g4                             ! diff=tick-lasttick
 503         mov     %o4,%o5                                 ! lasttick=tick
 504
 505         andn    %o0,63,%g1
 506         .word   0xc1985e00      !ldda   [%g1]0xf0,%f0   ! block load
 507         .word   0x8143e040      !membar #Sync
 508         .word   0xc1b85c00      !stda   %f0,[%g1]0xe0   ! block store and commit
 509         .word   0x8143e040      !membar #Sync
 510         ld      [%o0],%o4
 511         add     %o4,%g4,%g4
 512         .word   0xc9e2100c      !cas    [%o0],%o4,%g4
 513         subcc   %o1,1,%o1                               ! --$cnt
 514         bnz     .Loop
 515         add     %o0,4,%o0                               ! ++$out
 516
 517         retl
 518         mov     %o3,%o0
 519 .type   _sparcv9_vis1_instrument_bus,#function
 520 .size   _sparcv9_vis1_instrument_bus,.-_sparcv9_vis1_instrument_bus
 521
 522 .global _sparcv9_vis1_instrument_bus2
 523 .align  8
 524 _sparcv9_vis1_instrument_bus2:
 525         mov     %o1,%o3                                 ! save cnt
 526         sll     %o1,2,%o1                               ! cnt*=4
 527
 528         .word   0x99410000      !rd     %tick,%o4       ! tick
 529         mov     %o4,%o5                                 ! lasttick = tick
 530         set     0,%g4                                   ! diff
 531
 532         andn    %o0,63,%g1
 533         .word   0xc1985e00      !ldda   [%g1]0xf0,%f0   ! block load
 534         .word   0x8143e040      !membar #Sync
 535         .word   0xc1b85c00      !stda   %f0,[%g1]0xe0   ! block store and commit
 536         .word   0x8143e040      !membar #Sync
 537         ld      [%o0],%o4
 538         add     %o4,%g4,%g4
 539         .word   0xc9e2100c      !cas    [%o0],%o4,%g4
 540
 541         .word   0x99410000      !rd     %tick,%o4       ! tick
 542         sub     %o4,%o5,%g4                             ! diff=tick-lasttick
 543         mov     %o4,%o5                                 ! lasttick=tick
 544         mov     %g4,%g5                                 ! lastdiff=diff
 545 .Loop2:
 546         andn    %o0,63,%g1
 547         .word   0xc1985e00      !ldda   [%g1]0xf0,%f0   ! block load
 548         .word   0x8143e040      !membar #Sync
 549         .word   0xc1b85c00      !stda   %f0,[%g1]0xe0   ! block store and commit
 550         .word   0x8143e040      !membar #Sync
 551         ld      [%o0],%o4
 552         add     %o4,%g4,%g4
 553         .word   0xc9e2100c      !cas    [%o0],%o4,%g4
 554
 555         subcc   %o2,1,%o2                               ! --max
 556         bz      .Ldone2
 557         nop
 558
 559         .word   0x99410000      !rd     %tick,%o4       ! tick
 560         sub     %o4,%o5,%g4                             ! diff=tick-lasttick
 561         mov     %o4,%o5                                 ! lasttick=tick
 562         cmp     %g4,%g5
 563         mov     %g4,%g5                                 ! lastdiff=diff
 564
 565         .word   0x83408000      !rd     %ccr,%g1
 566         and     %g1,4,%g1                               ! isolate zero flag
 567         xor     %g1,4,%g1                               ! flip zero flag
 568
 569         subcc   %o1,%g1,%o1                             ! conditional --$cnt
 570         bnz     .Loop2
 571         add     %o0,%g1,%o0                             ! conditional ++$out
 572
 573 .Ldone2:
 574         srl     %o1,2,%o1
 575         retl
 576         sub     %o3,%o1,%o0
 577 .type   _sparcv9_vis1_instrument_bus2,#function
 578 .size   _sparcv9_vis1_instrument_bus2,.-_sparcv9_vis1_instrument_bus2
 579
 580 .section        ".init",#alloc,#execinstr
 581         call    OPENSSL_cpuid_setup
 582         nop