rom/exec/execstrap_init.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Exec patches for AROS for Amiga
   6     Lang: english
   7 */
   8
   9 #undef DEBUG
  10 #define DEBUG 0
  11 #define LMBSUPPORT 1
  12
  13 #include <exec/types.h>
  14 #include <exec/resident.h>
  15 #include <exec/nodes.h>
  16 #include <exec/execbase.h>
  17 #include <proto/exec.h>
  18
  19 #if LMBSUPPORT > 0
  20 #include <hardware/cia.h>
  21 #endif
  22
  23 #include "exec_extfuncs.h"
  24
  25 #include <aros/debug.h>
  26 #undef kprintf
  27
  28 /* flash() */
  29 void flash(UWORD);
  30
  31 #define RED     0xf00
  32 #define GREEN   0x0f0
  33 #define BLUE    0x00f
  34
  35 /*
  36     Architecture dependent function variations:
  37 */
  38 extern void AROS_SLIB_ENTRY(GetCC_10,Exec)();
  39 extern void AROS_SLIB_ENTRY(CacheClearU_20,Exec)();
  40 extern void AROS_SLIB_ENTRY(CacheClearU_40,Exec)();
  41 extern void AROS_SLIB_ENTRY(CachePreDMA_40,Exec)();
  42 extern void AROS_SLIB_ENTRY(CachePostDMA_30,Exec)();
  43 extern void AROS_SLIB_ENTRY(CachePostDMA_40,Exec)();
  44
  45 /*
  46     TODO:
  47
  48     Expand, improve and generally make the world a better place. :)
  49 */
  50
  51 int entry(void)
  52 {
  53     return -1;
  54 }
  55
  56 extern const char name[];
  57 extern const char version[];
  58 extern UBYTE dearray[];
  59 extern int start(void);
  60 extern const char end;
  61
  62 struct SpecialResident
  63 {
  64     struct Resident res;
  65     ULONG magiccookie;
  66     UBYTE *statusarray;
  67     UWORD maxslot;
  68 };
  69
  70 #define SR_COOKIE 0x4afa4afb
  71
  72 const struct SpecialResident resident =
  73 {
  74     {
  75     RTC_MATCHWORD,
  76     (struct Resident*)&resident,
  77     (APTR)&end,
  78     RTF_COLDSTART,
  79     41,                 /* version */
  80     NT_KICKMEM,
  81     106,                /* Just above exec.library.
  82                            Because exec is RTF_SINGLETASK, and this is
  83                            RTF_COLDSTART, we'll still be started after
  84                            exec. */
  85     (char *)name,
  86     (char *)&version[6],
  87     &start
  88     },
  89     SR_COOKIE,          /* magic cookie to recognize a patchable library */
  90     dearray,            /* pointer to array of function status bytes */
  91     137                 /* highest vector slot in this library */
  92 };
  93
  94 const char name[] = "exec.strap";
  95 const char version[] = "$VER: exec.strap 41.10 (2.4.1997)";
  96
  97 /*
  98     Array of function slots to enable/disable. They are all set to 1 (enabled)
  99     by default. Arosboot will find the SR_COOKIE in the resident structure to see
 100     if this array is present, and will then disable certain functions if they
 101     are specified as off in the config file. We could extend this for more config
 102     file options, as we have 7 more bits to play with in the array.
 103 */
 104 UBYTE dearray[] =
 105 {
 106     /* 137 functions in exec.library V40 (plus one for offset 0) */
 107     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*   0-  9 */
 108     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*  10- 19 */
 109     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*  20- 29 */
 110     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*  30- 39 */
 111     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*  40- 49 */
 112     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*  50- 59 */
 113     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*  60- 69 */
 114     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*  70- 79 */
 115     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*  80- 89 */
 116     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*  90- 99 */
 117     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 100-109 */
 118     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 110-119 */
 119     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 120-129 */
 120     1, 1, 1, 1, 1, 1, 1, 1        /* 130-137 */
 121 };
 122
 123 #define SetFunc(offset,name) \
 124 { \
 125     if(dearray[offset]) \
 126         SetFunction((struct Library *)SysBase, (offset * -6), (APTR)&AROS_SLIB_ENTRY(name,Exec)); \
 127 }
 128
 129 int start(void)
 130 {
 131 #if LMBSUPPORT > 0
 132     UBYTE *ciapra = (void *)0xbfe001;
 133 #endif
 134     struct ExecBase *SysBase;
 135     UWORD cpuflags;
 136
 137     SysBase = *(void **)4;
 138     cpuflags = SysBase->AttnFlags;
 139
 140 #if LMBSUPPORT > 0
 141     if(!(*ciapra & CIAF_GAMEPORT0))
 142     {
 143         D(bug("\nLMB pressed. Clearing reset vectors and resetting.\n\n"));
 144         SysBase->KickTagPtr = SysBase->KickMemPtr = SysBase->KickCheckSum = 0;
 145         flash(RED);
 146         ColdReboot(); /* Never returns. */
 147     }
 148 #endif
 149
 150     D(bug("\nexec.strap installing...\n"));
 151
 152     /*
 153         This test will have to be changed if we start patching the exec version
 154         number.
 155     */
 156     if (SysBase->LibNode.lib_Version < 37)
 157     {
 158         /* Refuse to run on anything less than ROM 2.04 */
 159         D(bug("Found kickstart < 37. Exec.strap not started.\n"));
 160         return 0;
 161     }
 162
 163     flash(BLUE);
 164
 165 #if 1 /* Disable in arosboot.config */
 166     /* The cause of a second infinite reset loop, as reported on 39.106 ROM?
 167        I have the same ROM, without this problem */
 168     /* Update: gcc produced 64-bit multiply instructions, which are missing on
 169        the 68060. Recoded so it won't produce these anymore. Still to test. */
 170     /* First patch SetFunction itself. */
 171     SetFunc( 70, SetFunction);
 172 #endif
 173
 174     /*
 175         The biggie: SetFunction() as many library vectors as possible.
 176         Protection from multitasking is provided by SetFunction (Forbid/Permit).
 177
 178         Some functions are safe to call even from interrupts, so protect these
 179         with Disable/Enable:
 180         Alert/Cause/Disable/Enable/FindName/FindPort/FindTask/PutMsg/ReplyMsg/Signal/
 181         AddHead/AddTail/Enqueue/RemHead/RemTail/Insert/Remove ... any more?
 182     */
 183     Disable();
 184
 185     SetFunc( 20, Disable);
 186     SetFunc( 22, Forbid);
 187 #if 0
 188     /* "Some trouble prevented CycleToMenu to initialize itself properly"
 189        Related to the microkernel. I know what it is. Cannot be fixed right now. */
 190     SetFunc( 23, Permit);
 191 #endif
 192
 193     SetFunc( 39, Insert);
 194     SetFunc( 40, AddHead);
 195     SetFunc( 41, AddTail);
 196     SetFunc( 42, Remove);
 197     SetFunc( 43, RemHead);
 198     SetFunc( 44, RemTail);
 199 #if 0
 200     /* Serial trouble. Can't receive a good/complete connectstring. */
 201     SetFunc( 45, Enqueue);
 202 #endif
 203     SetFunc( 46, FindName);
 204     SetFunc( 49, FindTask);
 205     SetFunc( 65, FindPort);
 206     SetFunc( 61, PutMsg);
 207     SetFunc( 63, ReplyMsg);
 208 #if 0
 209     /* The "move.w ccr,d0" should really be implemented as part of the jumptable, for speed.
 210        Do not patch, for now. */
 211     if ((cpuflags & AFF_68010) == AFF_68010)
 212         SetFunc( 88, GetCC_10);
 213 #endif
 214
 215 #if 0
 216     /*
 217         BTW:  What bit(s) is (are) set for the MC68060?
 218         ANS:  Bit 7.
 219         BTW2: They would really be set by the 68060.library, which will obviously
 220               not have executed at this point in the reset-procedure.
 221         ANS:  So we have to recognize it ourselves. Write routine.
 222         BTW3: If there is an agreed upon bit for the 68060, we could examine the
 223               type of processor for ourselves in exec.strap, and update AttnFlags
 224               accordingly.
 225         ANS:  See 2.
 226         BTW4: The 68060 can be recognized by its Processor Configuration Register (PCR).
 227               This register also contains the bit to enable Superscalar Operation,
 228               which we could set at this point in the reset-procedure to speed
 229               things up considerably (if nothing breaks).
 230         ANS:  Just try it.
 231         BTW5: For the MC68060, we could also enable the Branch Cache at this point.
 232         ANS:  Yep.
 233     */
 234
 235 #warning TODO: Rework
 236     /* TODO: Rework this logic so a particular vector isn't patched more than
 237        once. SetFunction() calls CacheClearU(), so putting the routine address
 238        directly in the vector+2, and manually clearing of the cache (not with
 239        the Cachexxx() functions) when done is the way to go here. Better write
 240        a short assembler function to do all this.
 241     */
 242     SetFunc(106, CacheClearU);
 243     SetFunc(127, CachePreDMA);
 244     SetFunc(128, CachePostDMA);
 245     if ((cpuflags & AFF_68020) == AFF_68020)
 246     {
 247         SetFunc(106, CacheClearU_20);
 248
 249         if ((cpuflags & AFF_68030) == AFF_68030)
 250         {
 251             SetFunc(128, CachePostDMA_30);
 252
 253             if ((cpuflags & AFF_68040) == AFF_68040)
 254             {
 255                 SetFunc(106, CacheClearU_40);
 256                 SetFunc(127, CachePreDMA_40);
 257                 SetFunc(128, CachePostDMA_40);
 258             }
 259         }
 260     }
 261 #endif
 262     Enable();
 263
 264     SetFunc( 12, InitCode);
 265 #if 0
 266     /* Fails, presumably on the AROS_ALIGN restrictions: */
 267     SetFunc( 13, InitStruct);
 268 #endif
 269     SetFunc( 14, MakeLibrary);
 270     SetFunc( 15, MakeFunctions);
 271     SetFunc( 16, FindResident);
 272     SetFunc( 17, InitResident);
 273     SetFunc( 27, SetIntVector);
 274     SetFunc( 28, AddIntServer);
 275     SetFunc( 29, RemIntServer);
 276 #if 0
 277     /* Computer boots ok, but then programs fail. KingCON allows you to enter
 278        a command, but if you enter return, hangs. No other keypresses are
 279        accepted; mclk (clock window) still runs, though: */
 280     SetFunc( 33, AllocMem);
 281     SetFunc( 35, FreeMem);
 282 #endif
 283     SetFunc( 36, AvailMem);
 284     SetFunc( 37, AllocEntry);
 285     SetFunc( 38, FreeEntry);
 286     SetFunc( 51, SetSignal);
 287     SetFunc( 55, AllocSignal);
 288     SetFunc( 56, FreeSignal);
 289     SetFunc( 59, AddPort);
 290     SetFunc( 60, RemPort);
 291     SetFunc( 62, GetMsg);
 292     SetFunc( 64, WaitPort);
 293     SetFunc( 66, AddLibrary);
 294     SetFunc( 67, RemLibrary);
 295     SetFunc( 68, OldOpenLibrary);
 296     SetFunc( 69, CloseLibrary);
 297     SetFunc( 71, SumLibrary);
 298     SetFunc( 72, AddDevice);
 299     SetFunc( 73, RemDevice);
 300     SetFunc( 74, OpenDevice);
 301     SetFunc( 75, CloseDevice);
 302     SetFunc( 76, DoIO);
 303     SetFunc( 77, SendIO);
 304     SetFunc( 78, CheckIO);
 305     SetFunc( 79, WaitIO);
 306     SetFunc( 80, AbortIO);
 307     SetFunc( 81, AddResource);
 308     SetFunc( 82, RemResource);
 309     SetFunc( 83, OpenResource);
 310 #if 0
 311     /* Hangs just after accessing HD for the first time. Related to BCPL/BSTR
 312        handling? */
 313     SetFunc( 87, RawDoFmt);
 314 #endif
 315     SetFunc( 89, TypeOfMem);
 316 #if 1 /* Disable in arosboot.config */
 317     /* May be incompatible with OS37 OpenLibrary() */
 318     SetFunc( 92, OpenLibrary);
 319 #endif
 320     SetFunc( 93, InitSemaphore);
 321 #if 0
 322     /* Can only be patched if we have control over the microkernel: */
 323     SetFunc( 94, ObtainSemaphore);
 324 #endif
 325 #if 0 /* ZZZ */
 326     SetFunc( 96, AttemptSemaphore);
 327 #endif
 328     SetFunc( 99, FindSemaphore);
 329     SetFunc(100, AddSemaphore);
 330     SetFunc(101, RemSemaphore);
 331     SetFunc(103, AddMemList);
 332     SetFunc(109, CreateIORequest);
 333     SetFunc(110, DeleteIORequest);
 334     SetFunc(111, CreateMsgPort);
 335     SetFunc(112, DeleteMsgPort);
 336 #if 0
 337     /* Can only be patched if we have control over the microkernel: */
 338     SetFunc(113, ObtainSemaphoreShared);
 339 #endif
 340     SetFunc(114, AllocVec);
 341     SetFunc(115, FreeVec);
 342 #if 0 /* Enable as a group, as they are not internally compat with orig */
 343     /* Guru 0100000f-> "DH0 Software Failure"-> 80000003 guru upon reset */
 344     SetFunc(116, CreatePool);
 345     SetFunc(117, DeletePool);
 346     SetFunc(118, AllocPooled);
 347     SetFunc(119, FreePooled);
 348 #endif
 349 #if 0 /* ZZZ */
 350     SetFunc(120, AttemptSemaphoreShared);
 351 #endif
 352     SetFunc(121, ColdReboot);
 353
 354     /*
 355         This test will have to be changed if we start patching the exec version
 356         number.
 357     */
 358     if (SysBase->LibNode.lib_Version >= 39)
 359     {
 360         D(bug("Found kickstart >= 39. Extra functions installed.\n"));
 361         /* V39+ functions: */
 362         SetFunc(129, AddMemHandler);
 363         SetFunc(130, RemMemHandler);
 364         SetFunc(135, TaggedOpenLibrary);
 365     }
 366     /* We don't have to clear any caches, SetFunction takes care of them. */
 367
 368     flash(GREEN);
 369
 370     D(bug("exec.strap installation done.\n"));
 371     return 0;
 372 }
 373
 374 /* High-tech display tricks :-) */
 375 void flash(UWORD color)
 376 {
 377     ULONG x, y;
 378     UWORD *color00 = (void *)0xdff180;
 379
 380     for (x=0; x<1000; x++)
 381     {
 382         for (y = 200; y; y--) *color00 = color;
 383         for (y = 200; y; y--) *color00 = 0x000;
 384     }
 385 }
 386
 387 const char end = 0;
 388
 389 /*************************************************************************
 390  *  Functions not yet added to this file (whether enabled or not):
 391  *
 392  *  Supervisor
 393  *  ExitIntr
 394  *  Schedule
 395  *  Reschedule
 396  *  Switch
 397  *  Dispatch
 398  *  Exception
 399  *  Alert
 400  *  Debug
 401  *  Enable
 402  *  SetSR
 403  *  SuperState
 404  *  UserState
 405  *  Cause
 406  *  Allocate
 407  *  Deallocate
 408  *  AllocAbs
 409  *  AddTask
 410  *  RemTask
 411  *  SetTaskPri
 412  *  SetExcept
 413  *  Wait
 414  *  Signal
 415  *  AllocTrap
 416  *  FreeTrap
 417  *  RawIOInit
 418  *  RawMayGetChar
 419  *  RawPutChar
 420  *  Procure
 421  *  Vacate
 422  *  ReleaseSemaphore
 423  *  ObtainSemaphoreList
 424  *  ReleaseSemaphoreList
 425  *  CopyMem
 426  *  CopyMemQuick
 427  *  CacheClearE
 428  *  CacheControl
 429  *  StackSwap
 430  *  ChildFree
 431  *  ChildOrphan
 432  *  ChildStatus
 433  *  ChildWait
 434  *  ObtainQuickVector
 435  *
 436  ************************************************************************/