sim/ppc/std-config.h

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21
  22 #ifndef _PSIM_CONFIG_H_
  23 #define _PSIM_CONFIG_H_
  24
  25
  26 /* endianness of the host/target:
  27
  28    If the build process is aware (at compile time) of the endianness
  29    of the host/target it is able to eliminate slower generic endian
  30    handling code.
  31
  32    Possible values are 0 (unknown), LITTLE_ENDIAN, BIG_ENDIAN */
  33
  34 #ifndef WITH_HOST_BYTE_ORDER
  35 #define WITH_HOST_BYTE_ORDER            0 /*unknown*/
  36 #endif
  37
  38 #ifndef WITH_TARGET_BYTE_ORDER
  39 #define WITH_TARGET_BYTE_ORDER          0 /*unknown*/
  40 #endif
  41
  42 extern int current_host_byte_order;
  43 #define CURRENT_HOST_BYTE_ORDER (WITH_HOST_BYTE_ORDER \
  44                                  ? WITH_HOST_BYTE_ORDER \
  45                                  : current_host_byte_order)
  46 extern int current_target_byte_order;
  47 #define CURRENT_TARGET_BYTE_ORDER (WITH_TARGET_BYTE_ORDER \
  48                                    ? WITH_TARGET_BYTE_ORDER \
  49                                    : current_target_byte_order)
  50
  51
  52 /* PowerPC XOR endian.
  53
  54    In addition to the above, the simulator can support the PowerPC's
  55    horrible XOR endian mode.  This feature makes it possible to
  56    control the endian mode of a processor using the MSR. */
  57
  58 #ifndef WITH_XOR_ENDIAN
  59 #define WITH_XOR_ENDIAN         8
  60 #endif
  61
  62
  63 /* Intel host BSWAP support:
  64
  65    Whether to use bswap on the 486 and pentiums rather than the 386
  66    sequence that uses xchgb/rorl/xchgb */
  67 #ifndef WITH_BSWAP
  68 #define WITH_BSWAP 0
  69 #endif
  70
  71
  72 /* SMP support:
  73
  74    Sets a limit on the number of processors that can be simulated.  If
  75    WITH_SMP is set to zero (0), the simulator is restricted to
  76    suporting only on processor (and as a consequence leaves the SMP
  77    code out of the build process).
  78
  79    The actual number of processors is taken from the device
  80    /options/smp@<nr-cpu> */
  81
  82 #ifndef WITH_SMP
  83 #define WITH_SMP                        5
  84 #endif
  85 #if WITH_SMP
  86 #define MAX_NR_PROCESSORS               WITH_SMP
  87 #else
  88 #define MAX_NR_PROCESSORS               1
  89 #endif
  90
  91
  92 /* Word size of host/target:
  93
  94    Set these according to your host and target requirements.  At this
  95    point in time, I've only compiled (not run) for a 64bit and never
  96    built for a 64bit host.  This will always remain a compile time
  97    option */
  98
  99 #ifndef WITH_TARGET_WORD_BITSIZE
 100 #define WITH_TARGET_WORD_BITSIZE        32 /* compiled only */
 101 #endif
 102
 103 #ifndef WITH_HOST_WORD_BITSIZE
 104 #define WITH_HOST_WORD_BITSIZE          32 /* 64bit ready? */
 105 #endif
 106
 107
 108 /* Program environment:
 109
 110    Three environments are available - UEA (user), VEA (virtual) and
 111    OEA (perating).  The former two are environment that users would
 112    expect to see (VEA includes things like coherency and the time
 113    base) while OEA is what an operating system expects to see.  By
 114    setting these to specific values, the build process is able to
 115    eliminate non relevent environment code
 116
 117    CURRENT_ENVIRONMENT specifies which of vea or oea is required for
 118    the current runtime. */
 119
 120 #define USER_ENVIRONMENT                1
 121 #define VIRTUAL_ENVIRONMENT             2
 122 #define OPERATING_ENVIRONMENT           3
 123
 124 #ifndef WITH_ENVIRONMENT
 125 #define WITH_ENVIRONMENT                0
 126 #endif
 127
 128 extern int current_environment;
 129 #define CURRENT_ENVIRONMENT (WITH_ENVIRONMENT \
 130                              ? WITH_ENVIRONMENT \
 131                              : current_environment)
 132
 133
 134 /* Optional VEA/OEA code:
 135
 136    The below, required for the OEA model may also be included in the
 137    VEA model however, as far as I can tell only make things
 138    slower... */
 139
 140
 141 /* Events.  Devices modeling real H/W need to be able to efficiently
 142    schedule things to do at known times in the future.  The event
 143    queue implements this.  Unfortunatly this adds the need to check
 144    for any events once each full instruction cycle. */
 145
 146 #define WITH_EVENTS                     (WITH_ENVIRONMENT != USER_ENVIRONMENT)
 147
 148
 149 /* Time base:
 150
 151    The PowerPC architecture includes the addition of both a time base
 152    register and a decrement timer.  Like events adds to the overhead
 153    of of some instruction cycles. */
 154
 155 #ifndef WITH_TIME_BASE
 156 #define WITH_TIME_BASE                  (WITH_ENVIRONMENT != USER_ENVIRONMENT)
 157 #endif
 158
 159
 160 /* Callback/Default Memory.
 161
 162    Core includes a builtin memory type (raw_memory) that is
 163    implemented using an array.  raw_memory does not require any
 164    additional functions etc.
 165
 166    Callback memory is where the core calls a core device for the data
 167    it requires.
 168
 169    Default memory is an extenstion of this where for addresses that do
 170    not map into either a callback or core memory range a default map
 171    can be used.
 172
 173    The OEA model uses callback memory for devices and default memory
 174    for buses.
 175
 176    The VEA model uses callback memory to capture `page faults'.
 177
 178    While it may be possible to eliminate callback/default memory (and
 179    hence also eliminate an additional test per memory fetch) it
 180    probably is not worth the effort.
 181
 182    BTW, while raw_memory could have been implemented as a callback,
 183    profiling has shown that there is a biger win (at least for the
 184    x86) in eliminating a function call for the most common
 185    (raw_memory) case. */
 186
 187 #define WITH_CALLBACK_MEMORY            1
 188
 189
 190 /* Alignment:
 191
 192    The PowerPC may or may not handle miss aligned transfers.  An
 193    implementation normally handles miss aligned transfers in big
 194    endian mode but generates an exception in little endian mode.
 195
 196    This model.  Instead allows both little and big endian modes to
 197    either take exceptions or handle miss aligned transfers.
 198
 199    If 0 is specified then for big-endian mode miss alligned accesses
 200    are permitted (NONSTRICT_ALIGNMENT) while in little-endian mode the
 201    processor will fault on them (STRICT_ALIGNMENT). */
 202
 203 #define NONSTRICT_ALIGNMENT             1
 204 #define STRICT_ALIGNMENT                2
 205
 206 #ifndef WITH_ALIGNMENT
 207 #define WITH_ALIGNMENT                  0
 208 #endif
 209
 210 extern int current_alignment;
 211 #define CURRENT_ALIGNMENT (WITH_ALIGNMENT \
 212                            ? WITH_ALIGNMENT \
 213                            : current_alignment)
 214
 215
 216 /* Floating point suport:
 217
 218    Still under development. */
 219
 220 #define SOFT_FLOATING_POINT             1
 221 #define HARD_FLOATING_POINT             2
 222
 223 #ifndef WITH_FLOATING_POINT
 224 #define WITH_FLOATING_POINT             HARD_FLOATING_POINT
 225 #endif
 226 extern int current_floating_point;
 227 #define CURRENT_FLOATING_POINT (WITH_FLOATING_POINT \
 228                                 ? WITH_FLOATING_POINT \
 229                                 : current_floating_point)
 230
 231
 232 /* Debugging:
 233
 234    Control the inclusion of debugging code. */
 235
 236 /* Include the tracing code.  Disabling this eliminates all tracing
 237    code */
 238
 239 #ifndef WITH_TRACE
 240 #define WITH_TRACE                      1
 241 #endif
 242
 243 /* include code that checks assertions scattered through out the
 244    program */
 245
 246 #ifndef WITH_ASSERT
 247 #define WITH_ASSERT                     1
 248 #endif
 249
 250 /* Whether to check instructions for reserved bits being set */
 251
 252 #ifndef WITH_RESERVED_BITS
 253 #define WITH_RESERVED_BITS              1
 254 #endif
 255
 256 /* include monitoring code */
 257
 258 #define MONITOR_INSTRUCTION_ISSUE       1
 259 #define MONITOR_LOAD_STORE_UNIT         2
 260 #ifndef WITH_MON
 261 #define WITH_MON                        (MONITOR_LOAD_STORE_UNIT \
 262                                          | MONITOR_INSTRUCTION_ISSUE)
 263 #endif
 264
 265 /* Current CPU model (models are in the generated models.h include file)  */
 266 #ifndef WITH_MODEL
 267 #define WITH_MODEL                      0
 268 #endif
 269
 270 #define CURRENT_MODEL (WITH_MODEL       \
 271                        ? WITH_MODEL     \
 272                        : current_model)
 273
 274 #ifndef WITH_DEFAULT_MODEL
 275 #define WITH_DEFAULT_MODEL              DEFAULT_MODEL
 276 #endif
 277
 278 #define MODEL_ISSUE_IGNORE              (-1)
 279 #define MODEL_ISSUE_PROCESS             1
 280
 281 #ifndef WITH_MODEL_ISSUE
 282 #define WITH_MODEL_ISSUE                0
 283 #endif
 284
 285 extern int current_model_issue;
 286 #define CURRENT_MODEL_ISSUE (WITH_MODEL_ISSUE   \
 287                              ? WITH_MODEL_ISSUE \
 288                              : current_model_issue)
 289
 290 /* Whether or not input/output just uses stdio, or uses printf_filtered for
 291    output, and polling input for input.  */
 292
 293 #define DONT_USE_STDIO                  2
 294 #define DO_USE_STDIO                    1
 295
 296 #ifndef WITH_STDIO
 297 #define WITH_STDIO                      0
 298 #endif
 299
 300 extern int current_stdio;
 301 #define CURRENT_STDIO (WITH_STDIO       \
 302                        ? WITH_STDIO     \
 303                        : current_stdio)
 304
 305
 306
 307 /* INLINE CODE SELECTION:
 308
 309    GCC -O3 attempts to inline any function or procedure in scope.  The
 310    options below facilitate fine grained control over what is and what
 311    isn't made inline.  For instance it can control things down to a
 312    specific modules static routines.  Doing this allows the compiler
 313    to both eliminate the overhead of function calls and (as a
 314    consequence) also eliminate further dead code.
 315
 316    On a CISC (x86) I've found that I can achieve an order of magintude
 317    speed improvement (x3-x5).  In the case of RISC (sparc) while the
 318    performance gain isn't as great it is still significant.
 319
 320    Each module is controled by the macro <module>_INLINE which can
 321    have the values described below
 322
 323        0  Do not inline any thing for the given module
 324
 325    The following additional values are `bit fields' and can be
 326    combined.
 327
 328       REVEAL_MODULE:
 329
 330          Include the C file for the module into the file being compiled
 331          but do not make the functions within the module inline.
 332
 333          While of no apparent benefit, this makes it possible for the
 334          included module, when compiled to inline its calls to what
 335          would otherwize be external functions.
 336
 337       INLINE_MODULE:
 338
 339          Make external functions within the module `inline'.  Thus if
 340          the module is included into a file being compiled, calls to
 341          its funtions can be eliminated. 2 implies 1.
 342
 343       INLINE_LOCALS:
 344
 345          Make internal (static) functions within the module `inline'.
 346
 347    The following abreviations are available:
 348
 349       INCLUDE_MODULE == (REVEAL_MODULE | INLINE_MODULE)
 350
 351       ALL_INLINE == (REVEAL_MODULE | INLINE_MODULE | INLINE_LOCALS)
 352
 353    In addition to this, modules have been put into two categories.
 354
 355          Simple modules - eg sim-endian.h bits.h
 356
 357          Because these modules are small and simple and do not have
 358          any complex interpendencies they are configured, if
 359          <module>_INLINE is so enabled, to inline themselves in all
 360          modules that include those files.
 361
 362          For the default build, this is a real win as all byte
 363          conversion and bit manipulation functions are inlined.
 364
 365          Complex modules - the rest
 366
 367          These are all handled using the files inline.h and inline.c.
 368          psim.c includes the above which in turn include any remaining
 369          code.
 370
 371    IMPLEMENTATION:
 372
 373    The inline ability is enabled by prefixing every data / function
 374    declaration and definition with one of the following:
 375
 376
 377        INLINE_<module>
 378
 379        Prefix to any global function that is a candidate for being
 380        inline.
 381
 382        values - `', `static', `static INLINE'
 383
 384
 385        EXTERN_<module>
 386
 387        Prefix to any global data structures for the module.  Global
 388        functions that are not to be inlined shall also be prefixed
 389        with this.
 390
 391        values - `', `static', `static'
 392
 393
 394        STATIC_INLINE_<module>
 395
 396        Prefix to any local (static) function that is a candidate for
 397        being made inline.
 398
 399        values - `static', `static INLINE'
 400
 401
 402        static
 403
 404        Prefix all local data structures.  Local functions that are not
 405        to be inlined shall also be prefixed with this.
 406
 407        values - `static', `static'
 408
 409        nb: will not work for modules that are being inlined for every
 410        use (white lie).
 411
 412
 413        extern
 414        #ifndef _INLINE_C_
 415        #endif
 416
 417        Prefix to any declaration of a global object (function or
 418        variable) that should not be inlined and should have only one
 419        definition.  The #ifndef wrapper goes around the definition
 420        propper to ensure that only one copy is generated.
 421
 422        nb: this will not work when a module is being inlined for every
 423        use.
 424
 425
 426        STATIC_<module>
 427
 428        Replaced by either `static' or `EXTERN_MODULE'.
 429
 430
 431    REALITY CHECK:
 432
 433    This is not for the faint hearted.  I've seen GCC get up to 500mb
 434    trying to compile what this can create.
 435
 436    Some of the modules do not yet implement the WITH_INLINE_STATIC
 437    option.  Instead they use the macro STATIC_INLINE to control their
 438    local function.
 439
 440    Because of the way that GCC parses __attribute__(), the macro's
 441    need to be adjacent to the functioin name rather then at the start
 442    of the line vis:
 443
 444         int STATIC_INLINE_MODULE f(void);
 445         void INLINE_MODULE *g(void);
 446
 447    */
 448
 449 #define REVEAL_MODULE                   1
 450 #define INLINE_MODULE                   2
 451 #define INCLUDE_MODULE                  (INLINE_MODULE | REVEAL_MODULE)
 452 #define INLINE_LOCALS                   4
 453 #define ALL_INLINE                      7
 454
 455 /* Your compilers inline reserved word */
 456
 457 #ifndef INLINE
 458 #if defined(__GNUC__) && defined(__OPTIMIZE__)
 459 #define INLINE __inline__
 460 #else
 461 #define INLINE /*inline*/
 462 #endif
 463 #endif
 464
 465
 466 /* Your compilers pass parameters in registers reserved word */
 467
 468 #ifndef WITH_REGPARM
 469 #define WITH_REGPARM                   0
 470 #endif
 471
 472 /* Your compilers use an alternative calling sequence reserved word */
 473
 474 #ifndef WITH_STDCALL
 475 #define WITH_STDCALL                   0
 476 #endif
 477
 478 #if !defined REGPARM
 479 #if defined(__GNUC__) && (defined(__i386__) || defined(__i486__) || defined(__i586__) || defined(__i686__))
 480 #if (WITH_REGPARM && WITH_STDCALL)
 481 #define REGPARM __attribute__((__regparm__(WITH_REGPARM),__stdcall__))
 482 #else
 483 #if (WITH_REGPARM && !WITH_STDCALL)
 484 #define REGPARM __attribute__((__regparm__(WITH_REGPARM)))
 485 #else
 486 #if (!WITH_REGPARM && WITH_STDCALL)
 487 #define REGPARM __attribute__((__stdcall__))
 488 #endif
 489 #endif
 490 #endif
 491 #endif
 492 #endif
 493
 494 #if !defined REGPARM
 495 #define REGPARM
 496 #endif
 497
 498
 499
 500 /* Default prefix for static functions */
 501
 502 #ifndef STATIC_INLINE
 503 #define STATIC_INLINE static INLINE
 504 #endif
 505
 506 /* Default macro to simplify control several of key the inlines */
 507
 508 #ifndef DEFAULT_INLINE
 509 #define DEFAULT_INLINE                  INLINE_LOCALS
 510 #endif
 511
 512 /* Code that converts between hosts and target byte order.  Used on
 513    every memory access (instruction and data).  See sim-endian.h for
 514    additional byte swapping configuration information.  This module
 515    can inline for all callers */
 516
 517 #ifndef SIM_ENDIAN_INLINE
 518 #define SIM_ENDIAN_INLINE               (DEFAULT_INLINE ? ALL_INLINE : 0)
 519 #endif
 520
 521 /* Low level bit manipulation routines. This module can inline for all
 522    callers */
 523
 524 #ifndef BITS_INLINE
 525 #define BITS_INLINE                     (DEFAULT_INLINE ? ALL_INLINE : 0)
 526 #endif
 527
 528 /* Code that gives access to various CPU internals such as registers.
 529    Used every time an instruction is executed */
 530
 531 #ifndef CPU_INLINE
 532 #define CPU_INLINE                      (DEFAULT_INLINE ? ALL_INLINE : 0)
 533 #endif
 534
 535 /* Code that translates between an effective and real address.  Used
 536    by every load or store. */
 537
 538 #ifndef VM_INLINE
 539 #define VM_INLINE                       DEFAULT_INLINE
 540 #endif
 541
 542 /* Code that loads/stores data to/from the memory data structure.
 543    Used by every load or store */
 544
 545 #ifndef CORE_INLINE
 546 #define CORE_INLINE                     DEFAULT_INLINE
 547 #endif
 548
 549 /* Code to check for and process any events scheduled in the future.
 550    Called once per instruction cycle */
 551
 552 #ifndef EVENTS_INLINE
 553 #define EVENTS_INLINE                   (DEFAULT_INLINE ? ALL_INLINE : 0)
 554 #endif
 555
 556 /* Code monotoring the processors performance.  It counts events on
 557    every instruction cycle */
 558
 559 #ifndef MON_INLINE
 560 #define MON_INLINE                      (DEFAULT_INLINE ? ALL_INLINE : 0)
 561 #endif
 562
 563 /* Code called on the rare occasions that an interrupt occures. */
 564
 565 #ifndef INTERRUPTS_INLINE
 566 #define INTERRUPTS_INLINE               DEFAULT_INLINE
 567 #endif
 568
 569 /* Code called on the rare occasion that either gdb or the device tree
 570    need to manipulate a register within a processor */
 571
 572 #ifndef REGISTERS_INLINE
 573 #define REGISTERS_INLINE                DEFAULT_INLINE
 574 #endif
 575
 576 /* Code called on the rare occasion that a processor is manipulating
 577    real hardware instead of RAM.
 578
 579    Also, most of the functions in devices.c are always called through
 580    a jump table. */
 581
 582 #ifndef DEVICE_INLINE
 583 #define DEVICE_INLINE                   (DEFAULT_INLINE ? INLINE_LOCALS : 0)
 584 #endif
 585
 586 /* Code called used while the device tree is being built.
 587
 588    Inlining this is of no benefit */
 589
 590 #ifndef TREE_INLINE
 591 #define TREE_INLINE                     (DEFAULT_INLINE ? INLINE_LOCALS : 0)
 592 #endif
 593
 594 /* Code called whenever information on a Special Purpose Register is
 595    required.  Called by the mflr/mtlr pseudo instructions */
 596
 597 #ifndef SPREG_INLINE
 598 #define SPREG_INLINE                    DEFAULT_INLINE
 599 #endif
 600
 601 /* Functions modeling the semantics of each instruction.  Two cases to
 602    consider, firstly of idecode is implemented with a switch then this
 603    allows the idecode function to inline each semantic function
 604    (avoiding a call).  The second case is when idecode is using a
 605    table, even then while the semantic functions can't be inlined,
 606    setting it to one still enables each semantic function to inline
 607    anything they call (if that code is marked for being inlined).
 608
 609    WARNING: you need lots (like 200mb of swap) of swap.  Setting this
 610    to 1 is useful when using a table as it enables the sematic code to
 611    inline all of their called functions */
 612
 613 #ifndef SEMANTICS_INLINE
 614 #define SEMANTICS_INLINE                (DEFAULT_INLINE & ~INLINE_MODULE)
 615 #endif
 616
 617 /* When using the instruction cache, code to decode an instruction and
 618    install it into the cache.  Normally called when ever there is a
 619    miss in the instruction cache. */
 620
 621 #ifndef ICACHE_INLINE
 622 #define ICACHE_INLINE                   (DEFAULT_INLINE & ~INLINE_MODULE)
 623 #endif
 624
 625 /* General functions called by semantics functions but part of the
 626    instruction table.  Although called by the semantic functions the
 627    frequency of calls is low.  Consequently the need to inline this
 628    code is reduced. */
 629
 630 #ifndef SUPPORT_INLINE
 631 #define SUPPORT_INLINE                  INLINE_LOCALS
 632 #endif
 633
 634 /* Model specific code used in simulating functional units.  Note, it actaully
 635    pays NOT to inline the PowerPC model functions (at least on the x86).  This
 636    is because if it is inlined, each PowerPC instruction gets a separate copy
 637    of the code, which is not friendly to the cache.  */
 638
 639 #ifndef MODEL_INLINE
 640 #define MODEL_INLINE                    (DEFAULT_INLINE & ~INLINE_MODULE)
 641 #endif
 642
 643 /* Code to print out what options we were compiled with.  Because this
 644    is called at process startup, it doesn't have to be inlined, but
 645    if it isn't brought in and the model routines are inline, the model
 646    routines will be pulled in twice.  */
 647
 648 #ifndef OPTIONS_INLINE
 649 #define OPTIONS_INLINE                  MODEL_INLINE
 650 #endif
 651
 652 /* idecode acts as the hub of the system, everything else is imported
 653    into this file */
 654
 655 #ifndef IDECOCE_INLINE
 656 #define IDECODE_INLINE                  INLINE_LOCALS
 657 #endif
 658
 659 /* psim, isn't actually inlined */
 660
 661 #ifndef PSIM_INLINE
 662 #define PSIM_INLINE                     INLINE_LOCALS
 663 #endif
 664
 665 /* Code to emulate os or rom compatibility.  This code is called via a
 666    table and hence there is little benefit in making it inline */
 667
 668 #ifndef OS_EMUL_INLINE
 669 #define OS_EMUL_INLINE                  0
 670 #endif
 671
 672 #endif /* _PSIM_CONFIG_H */