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root/cebix/SheepShaver/src/rom_patches.cpp
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Comparing SheepShaver/src/rom_patches.cpp (file contents):
Revision 1.11 by gbeauche, 2003-10-05T23:05:03Z vs.
Revision 1.28 by gbeauche, 2004-05-15T16:36:41Z

# Line 1 | Line 1
1   /*
2   *  rom_patches.cpp - ROM patches
3   *
4 < *  SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig
4 > *  SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig
5   *
6   *  This program is free software; you can redistribute it and/or modify
7   *  it under the terms of the GNU General Public License as published by
# Line 40 | Line 40
40   #include "audio_defs.h"
41   #include "serial.h"
42   #include "macos_util.h"
43 + #include "thunks.h"
44  
45   #define DEBUG 0
46   #include "debug.h"
# Line 58 | Line 59
59  
60  
61   // Other ROM addresses
62 < const uint32 CHECK_LOAD_PATCH_SPACE = 0x2f7f00;
63 < const uint32 PUT_SCRAP_PATCH_SPACE = 0x2f7f80;
64 < const uint32 GET_SCRAP_PATCH_SPACE = 0x2f7fc0;
65 < const uint32 ADDR_MAP_PATCH_SPACE = 0x2f8000;
62 > const uint32 CHECK_LOAD_PATCH_SPACE = 0x2fcf00;
63 > const uint32 PUT_SCRAP_PATCH_SPACE = 0x2fcf80;
64 > const uint32 GET_SCRAP_PATCH_SPACE = 0x2fcfc0;
65 > const uint32 ADDR_MAP_PATCH_SPACE = 0x2fd100;
66  
67   // Global variables
68   int ROMType;                            // ROM type
# Line 131 | Line 132 | void decode_parcels(const uint8 *src, ui
132                            (parcel_type >> 8) & 0xff, parcel_type & 0xff, &parcel_data[6]));
133                  if (parcel_type == FOURCC('r','o','m',' ')) {
134                          uint32 lzss_offset  = ntohl(parcel_data[2]);
135 <                        uint32 lzss_size = ((uint32)src + parcel_offset) - ((uint32)parcel_data + lzss_offset);
135 >                        uint32 lzss_size = ((uintptr)src + next_offset) - ((uintptr)parcel_data + lzss_offset);
136                          decode_lzss((uint8 *)parcel_data + lzss_offset, dest, lzss_size);
137                  }
138                  parcel_offset = next_offset;
# Line 269 | Line 270 | static uint32 find_rom_trap(uint16 trap)
270  
271  
272   /*
273 + *  Return target of branch instruction specified at ADDR, or 0 if
274 + *  there is no such instruction
275 + */
276 +
277 + static uint32 powerpc_branch_target(uintptr addr)
278 + {
279 +        uint32 opcode = ntohl(*(uint32 *)addr);
280 +        uint32 primop = opcode >> 26;
281 +        uint32 target = 0;
282 +
283 +        if (primop == 18) {                     // Branch
284 +                target = opcode & 0x3fffffc;
285 +                if (target & 0x2000000)
286 +                        target |= 0xfc000000;
287 +                if ((opcode & 2) == 0)
288 +                        target += addr;
289 +        }
290 +        else if (primop == 16) {        // Branch Conditional
291 +                target = (int32)(int16)(opcode & 0xfffc);
292 +                if ((opcode & 2) == 0)
293 +                        target += addr;
294 +        }
295 +        return target;
296 + }
297 +
298 +
299 + /*
300 + *  Search ROM for instruction branching to target address, return 0 if none found
301 + */
302 +
303 + static uint32 find_rom_powerpc_branch(uint32 start, uint32 end, uint32 target)
304 + {
305 +        for (uint32 addr = start; addr < end; addr += 4) {
306 +                if (powerpc_branch_target(ROM_BASE + addr) == ROM_BASE + target)
307 +                        return addr;
308 +        }
309 +        return 0;
310 + }
311 +
312 +
313 + /*
314 + *  Check that requested ROM patch space is really available
315 + */
316 +
317 + static bool check_rom_patch_space(uint32 base, uint32 size)
318 + {
319 +        size = (size + 3) & -4;
320 +        for (int i = 0; i < size; i += 4) {
321 +                uint32 x = ntohl(*(uint32 *)(ROM_BASE + base + i));
322 +                if (x != 0x6b636b63 && x != 0)
323 +                        return false;
324 +        }
325 +        return true;
326 + }
327 +
328 +
329 + /*
330   *  List of audio sifters installed in ROM and System file
331   */
332  
# Line 447 | Line 505 | static const uint8 cdrom_driver[] = {  //
505          0x4e, 0x75                                                      //  rts
506   };
507  
508 < #if EMULATED_PPC
451 < #define SERIAL_TRAMPOLINES 1
452 < static uint32 serial_nothing_tvect[2] = {tswap32(POWERPC_NATIVE_OP_FUNC(NATIVE_SERIAL_NOTHING)), 0};
453 < static uint32 serial_open_tvect[2] = {tswap32(POWERPC_NATIVE_OP_FUNC(NATIVE_SERIAL_OPEN)), 0};
454 < static uint32 serial_prime_in_tvect[2] = {tswap32(POWERPC_NATIVE_OP_FUNC(NATIVE_SERIAL_PRIME_IN)), 0};
455 < static uint32 serial_prime_out_tvect[2] = {tswap32(POWERPC_NATIVE_OP_FUNC(NATIVE_SERIAL_PRIME_OUT)), 0};
456 < static uint32 serial_control_tvect[2] = {tswap32(POWERPC_NATIVE_OP_FUNC(NATIVE_SERIAL_CONTROL)), 0};
457 < static uint32 serial_status_tvect[2] = {tswap32(POWERPC_NATIVE_OP_FUNC(NATIVE_SERIAL_STATUS)), 0};
458 < static uint32 serial_close_tvect[2] = {tswap32(POWERPC_NATIVE_OP_FUNC(NATIVE_SERIAL_CLOSE)), 0};
459 < #elif defined(__linux__)
460 < #define SERIAL_TRAMPOLINES 1
461 < static uint32 serial_nothing_tvect[2] = {(uint32)SerialNothing, 0};
462 < static uint32 serial_open_tvect[2] = {(uint32)SerialOpen, 0};
463 < static uint32 serial_prime_in_tvect[2] = {(uint32)SerialPrimeIn, 0};
464 < static uint32 serial_prime_out_tvect[2] = {(uint32)SerialPrimeOut, 0};
465 < static uint32 serial_control_tvect[2] = {(uint32)SerialControl, 0};
466 < static uint32 serial_status_tvect[2] = {(uint32)SerialStatus, 0};
467 < static uint32 serial_close_tvect[2] = {(uint32)SerialClose, 0};
468 < #endif
508 > static uint32 long_ptr;
509  
510 < static const uint32 ain_driver[] = {    // .AIn driver header
511 <        0x4d000000, 0x00000000,
512 <        0x00200040, 0x00600080,
513 <        0x00a0042e, 0x41496e00,
514 <        0x00000000, 0x00000000,
515 <        0xaafe0700, 0x00000000,
516 <        0x00000000, 0x00179822,
517 < #ifdef SERIAL_TRAMPOLINES
518 <        0x00010004, (uint32)serial_nothing_tvect,
519 < #else
520 <        0x00010004, (uint32)SerialNothing,
521 < #endif
522 <        0x00000000, 0x00000000,
523 <        0xaafe0700, 0x00000000,
524 <        0x00000000, 0x00179822,
525 < #ifdef SERIAL_TRAMPOLINES
526 <        0x00010004, (uint32)serial_prime_in_tvect,
527 < #else
528 <        0x00010004, (uint32)SerialPrimeIn,
529 < #endif
530 <        0x00000000, 0x00000000,
531 <        0xaafe0700, 0x00000000,
532 <        0x00000000, 0x00179822,
533 < #ifdef SERIAL_TRAMPOLINES
534 <        0x00010004, (uint32)serial_control_tvect,
535 < #else
536 <        0x00010004, (uint32)SerialControl,
537 < #endif
538 <        0x00000000, 0x00000000,
539 <        0xaafe0700, 0x00000000,
540 <        0x00000000, 0x00179822,
541 < #ifdef SERIAL_TRAMPOLINES
542 <        0x00010004, (uint32)serial_status_tvect,
543 < #else
544 <        0x00010004, (uint32)SerialStatus,
545 < #endif
546 <        0x00000000, 0x00000000,
547 <        0xaafe0700, 0x00000000,
548 <        0x00000000, 0x00179822,
549 < #ifdef SERIAL_TRAMPOLINES
510 <        0x00010004, (uint32)serial_nothing_tvect,
511 < #else
512 <        0x00010004, (uint32)SerialNothing,
513 < #endif
514 <        0x00000000, 0x00000000,
510 > static void SetLongBase(uint32 addr)
511 > {
512 >        long_ptr = addr;
513 > }
514 >
515 > static void Long(uint32 value)
516 > {
517 >        WriteMacInt32(long_ptr, value);
518 >        long_ptr += 4;
519 > }
520 >
521 > static void gen_ain_driver(uintptr addr)
522 > {
523 >        SetLongBase(addr);
524 >
525 >        // .AIn driver header
526 >        Long(0x4d000000); Long(0x00000000);
527 >        Long(0x00200040); Long(0x00600080);
528 >        Long(0x00a0042e); Long(0x41496e00);
529 >        Long(0x00000000); Long(0x00000000);
530 >        Long(0xaafe0700); Long(0x00000000);
531 >        Long(0x00000000); Long(0x00179822);
532 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_NOTHING));
533 >        Long(0x00000000); Long(0x00000000);
534 >        Long(0xaafe0700); Long(0x00000000);
535 >        Long(0x00000000); Long(0x00179822);
536 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_PRIME_IN));
537 >        Long(0x00000000); Long(0x00000000);
538 >        Long(0xaafe0700); Long(0x00000000);
539 >        Long(0x00000000); Long(0x00179822);
540 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_CONTROL));
541 >        Long(0x00000000); Long(0x00000000);
542 >        Long(0xaafe0700); Long(0x00000000);
543 >        Long(0x00000000); Long(0x00179822);
544 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_STATUS));
545 >        Long(0x00000000); Long(0x00000000);
546 >        Long(0xaafe0700); Long(0x00000000);
547 >        Long(0x00000000); Long(0x00179822);
548 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_NOTHING));
549 >        Long(0x00000000); Long(0x00000000);
550   };
551  
552 < static const uint32 aout_driver[] = {   // .AOut driver header
553 <        0x4d000000, 0x00000000,
554 <        0x00200040, 0x00600080,
555 <        0x00a0052e, 0x414f7574,
556 <        0x00000000, 0x00000000,
557 <        0xaafe0700, 0x00000000,
558 <        0x00000000, 0x00179822,
559 < #ifdef SERIAL_TRAMPOLINES
560 <        0x00010004, (uint32)serial_open_tvect,
561 < #else
562 <        0x00010004, (uint32)SerialOpen,
563 < #endif
564 <        0x00000000, 0x00000000,
565 <        0xaafe0700, 0x00000000,
566 <        0x00000000, 0x00179822,
567 < #ifdef SERIAL_TRAMPOLINES
568 <        0x00010004, (uint32)serial_prime_out_tvect,
569 < #else
570 <        0x00010004, (uint32)SerialPrimeOut,
571 < #endif
572 <        0x00000000, 0x00000000,
573 <        0xaafe0700, 0x00000000,
574 <        0x00000000, 0x00179822,
575 < #ifdef SERIAL_TRAMPOLINES
576 <        0x00010004, (uint32)serial_control_tvect,
577 < #else
578 <        0x00010004, (uint32)SerialControl,
579 < #endif
580 <        0x00000000, 0x00000000,
546 <        0xaafe0700, 0x00000000,
547 <        0x00000000, 0x00179822,
548 < #ifdef SERIAL_TRAMPOLINES
549 <        0x00010004, (uint32)serial_status_tvect,
550 < #else
551 <        0x00010004, (uint32)SerialStatus,
552 < #endif
553 <        0x00000000, 0x00000000,
554 <        0xaafe0700, 0x00000000,
555 <        0x00000000, 0x00179822,
556 < #ifdef SERIAL_TRAMPOLINES
557 <        0x00010004, (uint32)serial_close_tvect,
558 < #else
559 <        0x00010004, (uint32)SerialClose,
560 < #endif
561 <        0x00000000, 0x00000000,
552 > static void gen_aout_driver(uintptr addr)
553 > {
554 >        SetLongBase(addr);
555 >
556 >        // .AOut driver header
557 >        Long(0x4d000000); Long(0x00000000);
558 >        Long(0x00200040); Long(0x00600080);
559 >        Long(0x00a0052e); Long(0x414f7574);
560 >        Long(0x00000000); Long(0x00000000);
561 >        Long(0xaafe0700); Long(0x00000000);
562 >        Long(0x00000000); Long(0x00179822);
563 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_OPEN));
564 >        Long(0x00000000); Long(0x00000000);
565 >        Long(0xaafe0700); Long(0x00000000);
566 >        Long(0x00000000); Long(0x00179822);
567 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_PRIME_OUT));
568 >        Long(0x00000000); Long(0x00000000);
569 >        Long(0xaafe0700); Long(0x00000000);
570 >        Long(0x00000000); Long(0x00179822);
571 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_CONTROL));
572 >        Long(0x00000000); Long(0x00000000);
573 >        Long(0xaafe0700); Long(0x00000000);
574 >        Long(0x00000000); Long(0x00179822);
575 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_STATUS));
576 >        Long(0x00000000); Long(0x00000000);
577 >        Long(0xaafe0700); Long(0x00000000);
578 >        Long(0x00000000); Long(0x00179822);
579 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_CLOSE));
580 >        Long(0x00000000); Long(0x00000000);
581   };
582  
583 < static const uint32 bin_driver[] = {    // .BIn driver header
584 <        0x4d000000, 0x00000000,
585 <        0x00200040, 0x00600080,
586 <        0x00a0042e, 0x42496e00,
587 <        0x00000000, 0x00000000,
588 <        0xaafe0700, 0x00000000,
589 <        0x00000000, 0x00179822,
590 < #ifdef SERIAL_TRAMPOLINES
591 <        0x00010004, (uint32)serial_nothing_tvect,
592 < #else
593 <        0x00010004, (uint32)SerialNothing,
594 < #endif
595 <        0x00000000, 0x00000000,
596 <        0xaafe0700, 0x00000000,
597 <        0x00000000, 0x00179822,
598 < #ifdef SERIAL_TRAMPOLINES
599 <        0x00010004, (uint32)serial_prime_in_tvect,
600 < #else
601 <        0x00010004, (uint32)SerialPrimeIn,
602 < #endif
603 <        0x00000000, 0x00000000,
604 <        0xaafe0700, 0x00000000,
605 <        0x00000000, 0x00179822,
606 < #ifdef SERIAL_TRAMPOLINES
607 <        0x00010004, (uint32)serial_control_tvect,
608 < #else
609 <        0x00010004, (uint32)SerialControl,
610 < #endif
611 <        0x00000000, 0x00000000,
593 <        0xaafe0700, 0x00000000,
594 <        0x00000000, 0x00179822,
595 < #ifdef SERIAL_TRAMPOLINES
596 <        0x00010004, (uint32)serial_status_tvect,
597 < #else
598 <        0x00010004, (uint32)SerialStatus,
599 < #endif
600 <        0x00000000, 0x00000000,
601 <        0xaafe0700, 0x00000000,
602 <        0x00000000, 0x00179822,
603 < #ifdef SERIAL_TRAMPOLINES
604 <        0x00010004, (uint32)serial_nothing_tvect,
605 < #else
606 <        0x00010004, (uint32)SerialNothing,
607 < #endif
608 <        0x00000000, 0x00000000,
583 > static void gen_bin_driver(uintptr addr)
584 > {
585 >        SetLongBase(addr);
586 >
587 >        // .BIn driver header
588 >        Long(0x4d000000); Long(0x00000000);
589 >        Long(0x00200040); Long(0x00600080);
590 >        Long(0x00a0042e); Long(0x42496e00);
591 >        Long(0x00000000); Long(0x00000000);
592 >        Long(0xaafe0700); Long(0x00000000);
593 >        Long(0x00000000); Long(0x00179822);
594 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_NOTHING));
595 >        Long(0x00000000); Long(0x00000000);
596 >        Long(0xaafe0700); Long(0x00000000);
597 >        Long(0x00000000); Long(0x00179822);
598 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_PRIME_IN));
599 >        Long(0x00000000); Long(0x00000000);
600 >        Long(0xaafe0700); Long(0x00000000);
601 >        Long(0x00000000); Long(0x00179822);
602 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_CONTROL));
603 >        Long(0x00000000); Long(0x00000000);
604 >        Long(0xaafe0700); Long(0x00000000);
605 >        Long(0x00000000); Long(0x00179822);
606 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_STATUS));
607 >        Long(0x00000000); Long(0x00000000);
608 >        Long(0xaafe0700); Long(0x00000000);
609 >        Long(0x00000000); Long(0x00179822);
610 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_NOTHING));
611 >        Long(0x00000000); Long(0x00000000);
612   };
613  
614 < static const uint32 bout_driver[] = {   // .BOut driver header
615 <        0x4d000000, 0x00000000,
616 <        0x00200040, 0x00600080,
617 <        0x00a0052e, 0x424f7574,
618 <        0x00000000, 0x00000000,
619 <        0xaafe0700, 0x00000000,
620 <        0x00000000, 0x00179822,
621 < #ifdef SERIAL_TRAMPOLINES
622 <        0x00010004, (uint32)serial_open_tvect,
623 < #else
624 <        0x00010004, (uint32)SerialOpen,
625 < #endif
626 <        0x00000000, 0x00000000,
627 <        0xaafe0700, 0x00000000,
628 <        0x00000000, 0x00179822,
629 < #ifdef SERIAL_TRAMPOLINES
630 <        0x00010004, (uint32)serial_prime_out_tvect,
631 < #else
632 <        0x00010004, (uint32)SerialPrimeOut,
633 < #endif
634 <        0x00000000, 0x00000000,
635 <        0xaafe0700, 0x00000000,
636 <        0x00000000, 0x00179822,
637 < #ifdef SERIAL_TRAMPOLINES
638 <        0x00010004, (uint32)serial_control_tvect,
639 < #else
640 <        0x00010004, (uint32)SerialControl,
641 < #endif
642 <        0x00000000, 0x00000000,
640 <        0xaafe0700, 0x00000000,
641 <        0x00000000, 0x00179822,
642 < #ifdef SERIAL_TRAMPOLINES
643 <        0x00010004, (uint32)serial_status_tvect,
644 < #else
645 <        0x00010004, (uint32)SerialStatus,
646 < #endif
647 <        0x00000000, 0x00000000,
648 <        0xaafe0700, 0x00000000,
649 <        0x00000000, 0x00179822,
650 < #ifdef SERIAL_TRAMPOLINES
651 <        0x00010004, (uint32)serial_close_tvect,
652 < #else
653 <        0x00010004, (uint32)SerialClose,
654 < #endif
655 <        0x00000000, 0x00000000,
614 > static void gen_bout_driver(uintptr addr)
615 > {
616 >        SetLongBase(addr);
617 >
618 >        // .BOut driver header
619 >        Long(0x4d000000); Long(0x00000000);
620 >        Long(0x00200040); Long(0x00600080);
621 >        Long(0x00a0052e); Long(0x424f7574);
622 >        Long(0x00000000); Long(0x00000000);
623 >        Long(0xaafe0700); Long(0x00000000);
624 >        Long(0x00000000); Long(0x00179822);
625 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_OPEN));
626 >        Long(0x00000000); Long(0x00000000);
627 >        Long(0xaafe0700); Long(0x00000000);
628 >        Long(0x00000000); Long(0x00179822);
629 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_PRIME_OUT));
630 >        Long(0x00000000); Long(0x00000000);
631 >        Long(0xaafe0700); Long(0x00000000);
632 >        Long(0x00000000); Long(0x00179822);
633 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_CONTROL));
634 >        Long(0x00000000); Long(0x00000000);
635 >        Long(0xaafe0700); Long(0x00000000);
636 >        Long(0x00000000); Long(0x00179822);
637 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_STATUS));
638 >        Long(0x00000000); Long(0x00000000);
639 >        Long(0xaafe0700); Long(0x00000000);
640 >        Long(0x00000000); Long(0x00179822);
641 >        Long(0x00010004); Long(NativeTVECT(NATIVE_SERIAL_CLOSE));
642 >        Long(0x00000000); Long(0x00000000);
643   };
644  
645   static const uint8 adbop_patch[] = {    // Call ADBOp() completion procedure
# Line 725 | Line 712 | bool PatchROM(void)
712          else
713                  return false;
714  
715 +        // Check that other ROM addresses point to really free regions
716 +        if (!check_rom_patch_space(CHECK_LOAD_PATCH_SPACE, 0x40))
717 +                return false;
718 +        if (!check_rom_patch_space(PUT_SCRAP_PATCH_SPACE, 0x40))
719 +                return false;
720 +        if (!check_rom_patch_space(GET_SCRAP_PATCH_SPACE, 0x40))
721 +                return false;
722 +        if (!check_rom_patch_space(ADDR_MAP_PATCH_SPACE - 10 * 4, 0x100))
723 +                return false;
724 +
725          // Apply patches
726          if (!patch_nanokernel_boot()) return false;
727          if (!patch_68k_emul()) return false;
# Line 757 | Line 754 | bool PatchROM(void)
754   static bool patch_nanokernel_boot(void)
755   {
756          uint32 *lp;
757 +        uint32 base, loc;
758  
759          // ROM boot structure patches
760          lp = (uint32 *)(ROM_BASE + 0x30d000);
# Line 769 | Line 767 | static bool patch_nanokernel_boot(void)
767          lp[0xfd8 >> 2] = htonl(ROM_BASE + 0x2a);                // 68k reset vector
768  
769          // Skip SR/BAT/SDR init
770 +        loc = 0x310000;
771          if (ROMType == ROMTYPE_GAZELLE || ROMType == ROMTYPE_GOSSAMER || ROMType == ROMTYPE_NEWWORLD) {
772 <                lp = (uint32 *)(ROM_BASE + 0x310000);
772 >                lp = (uint32 *)(ROM_BASE + loc);
773                  *lp++ = htonl(POWERPC_NOP);
774                  *lp = htonl(0x38000000);
775          }
776 <        static const uint32 sr_init_loc[] = {0x3101b0, 0x3101b0, 0x3101b0, 0x3101ec, 0x3101fc, 0x310200};
777 <        lp = (uint32 *)(ROM_BASE + 0x310008);
778 <        *lp = htonl(0x48000000 | (sr_init_loc[ROMType] - 8) & 0xffff);  // b            ROM_BASE+0x3101b0
779 <        lp = (uint32 *)(ROM_BASE + sr_init_loc[ROMType]);
776 >        static const uint8 sr_init_dat[] = {0x35, 0x4a, 0xff, 0xfc, 0x7d, 0x86, 0x50, 0x2e};
777 >        if ((base = find_rom_data(0x3101b0, 0x3105b0, sr_init_dat, sizeof(sr_init_dat))) == 0) return false;
778 >        D(bug("sr_init %08lx\n", base));
779 >        lp = (uint32 *)(ROM_BASE + loc + 8);
780 >        *lp = htonl(0x48000000 | ((base - loc - 8) & 0x3fffffc));       // b            ROM_BASE+0x3101b0
781 >        lp = (uint32 *)(ROM_BASE + base);
782          *lp++ = htonl(0x80200000 + XLM_KERNEL_DATA);            // lwz  r1,(pointer to Kernel Data)
783          *lp++ = htonl(0x3da0dead);              // lis  r13,0xdead      (start of kernel memory)
784          *lp++ = htonl(0x3dc00010);              // lis  r14,0x0010      (size of page table)
785          *lp = htonl(0x3de00010);                // lis  r15,0x0010      (size of kernel memory)
786  
787          // Don't read PVR
788 <        static const uint32 pvr_loc[] = {0x3103b0, 0x3103b4, 0x3103b4, 0x310400, 0x310430, 0x310438};
789 <        lp = (uint32 *)(ROM_BASE + pvr_loc[ROMType]);
788 >        static const uint8 pvr_read_dat[] = {0x7d, 0x9f, 0x42, 0xa6};
789 >        if ((base = find_rom_data(0x3103b0, 0x3108b0, pvr_read_dat, sizeof(pvr_read_dat))) == 0) return false;
790 >        D(bug("pvr_read %08lx\n", base));
791 >        lp = (uint32 *)(ROM_BASE + base);
792          *lp = htonl(0x81800000 + XLM_PVR);      // lwz  r12,(theoretical PVR)
793  
794          // Set CPU specific data (even if ROM doesn't have support for that CPU)
792        lp = (uint32 *)(ROM_BASE + pvr_loc[ROMType]);
795          if (ntohl(lp[6]) != 0x2c0c0001)
796                  return false;
797          uint32 ofs = ntohl(lp[7]) & 0xffff;
798          D(bug("ofs %08lx\n", ofs));
799          lp[8] = htonl((ntohl(lp[8]) & 0xffff) | 0x48000000);    // beq -> b
800 <        uint32 loc = (ntohl(lp[8]) & 0xffff) + (uint32)(lp+8) - ROM_BASE;
800 >        loc = (ntohl(lp[8]) & 0xffff) + (uint32)(lp+8) - ROM_BASE;
801          D(bug("loc %08lx\n", loc));
802          lp = (uint32 *)(ROM_BASE + ofs + 0x310000);
803          switch (PVR >> 16) {
# Line 869 | Line 871 | static bool patch_nanokernel_boot(void)
871                          lp[8] = htonl(0x00800002);      // TLB total size/TLB assoc
872                          break;
873   //              case 11:        // X704?
874 <                case 12:        // ???
874 >                case 12:        // 7400, 7410
875 >                case 0x800c:
876                          lp[0] = htonl(0x1000);          // Page size
877                          lp[1] = htonl(0x8000);          // Data cache size
878                          lp[2] = htonl(0x8000);          // Inst cache size
# Line 910 | Line 913 | static bool patch_nanokernel_boot(void)
913          }
914  
915          // Don't set SPRG3, don't test MQ
916 <        lp = (uint32 *)(ROM_BASE + loc + 0x20);
917 <        *lp++ = htonl(POWERPC_NOP);
918 <        lp++;
919 <        *lp++ = htonl(POWERPC_NOP);
920 <        lp++;
921 <        *lp = htonl(POWERPC_NOP);
916 >        static const uint8 sprg3_mq_dat[] = {0x7d, 0x13, 0x43, 0xa6, 0x3d, 0x00, 0x00, 0x04, 0x7d, 0x00, 0x03, 0xa6, 0x39, 0x00, 0x00, 0x00, 0x7d, 0x00, 0x02, 0xa6};
917 >        if ((base = find_rom_data(loc + 0x20, loc + 0x60, sprg3_mq_dat, sizeof(sprg3_mq_dat))) == 0) return false;
918 >        D(bug("sprg3/mq %08lx\n", base));
919 >        lp = (uint32 *)(ROM_BASE + base);
920 >        lp[0] = htonl(POWERPC_NOP);
921 >        lp[2] = htonl(POWERPC_NOP);
922 >        lp[4] = htonl(POWERPC_NOP);
923  
924          // Don't read MSR
925 <        lp = (uint32 *)(ROM_BASE + loc + 0x40);
925 >        static const uint8 msr_dat[] = {0x7d, 0xc0, 0x00, 0xa6};
926 >        if ((base = find_rom_data(loc + 0x40, loc + 0x80, msr_dat, sizeof(msr_dat))) == 0) return false;
927 >        D(bug("msr %08lx\n", base));
928 >        lp = (uint32 *)(ROM_BASE + base);
929          *lp = htonl(0x39c00000);                // li   r14,0
930  
931          // Don't write to DEC
# Line 928 | Line 935 | static bool patch_nanokernel_boot(void)
935          D(bug("loc %08lx\n", loc));
936  
937          // Don't set SPRG3
938 <        lp = (uint32 *)(ROM_BASE + loc + 0x2c);
938 >        static const uint8 sprg3_dat[] = {0x39, 0x21, 0x03, 0x60, 0x7d, 0x33, 0x43, 0xa6, 0x39, 0x01, 0x04, 0x20};
939 >        if ((base = find_rom_data(0x310000, 0x314000, sprg3_dat, sizeof(sprg3_dat))) == 0) return false;
940 >        D(bug("sprg3 %08lx\n", base + 4));
941 >        lp = (uint32 *)(ROM_BASE + base + 4);
942          *lp = htonl(POWERPC_NOP);
943  
944          // Don't read PVR
945 <        static const uint32 pvr_ofs[] = {0x138, 0x138, 0x138, 0x140, 0x148, 0x148};
946 <        lp = (uint32 *)(ROM_BASE + loc + pvr_ofs[ROMType]);
945 >        static const uint8 pvr_read2_dat[] = {0x7e, 0xff, 0x42, 0xa6, 0x56, 0xf7, 0x84, 0x3e};
946 >        if ((base = find_rom_data(0x310000, 0x320000, pvr_read2_dat, sizeof(pvr_read2_dat))) == 0) return false;
947 >        D(bug("pvr_read2 %08lx\n", base));
948 >        lp = (uint32 *)(ROM_BASE + base);
949          *lp = htonl(0x82e00000 + XLM_PVR);              // lwz  r23,(theoretical PVR)
950 <        lp = (uint32 *)(ROM_BASE + loc + 0x170);
951 <        if (ntohl(*lp) == 0x7eff42a6)   // NewWorld or Gossamer ROM
950 >        if ((base = find_rom_data(base + 4, 0x320000, pvr_read2_dat, sizeof(pvr_read2_dat))) != 0) {
951 >                D(bug("pvr_read2 %08lx\n", base));
952 >                lp = (uint32 *)(ROM_BASE + base);
953                  *lp = htonl(0x82e00000 + XLM_PVR);      // lwz  r23,(theoretical PVR)
954 <        lp = (uint32 *)(ROM_BASE + 0x313134);
955 <        if (ntohl(*lp) == 0x7e5f42a6)
956 <                *lp = htonl(0x82400000 + XLM_PVR);      // lwz  r18,(theoretical PVR)
957 <        lp = (uint32 *)(ROM_BASE + 0x3131f4);
958 <        if (ntohl(*lp) == 0x7e5f42a6)   // NewWorld ROM
954 >        }
955 >        static const uint8 pvr_read3_dat[] = {0x7e, 0x5f, 0x42, 0xa6, 0x56, 0x52, 0x84, 0x3e};
956 >        if ((base = find_rom_data(0x310000, 0x320000, pvr_read3_dat, sizeof(pvr_read3_dat))) != 0) {
957 >                D(bug("pvr_read3 %08lx\n", base));
958 >                lp = (uint32 *)(ROM_BASE + base);
959                  *lp = htonl(0x82400000 + XLM_PVR);      // lwz  r18,(theoretical PVR)
960 <        lp = (uint32 *)(ROM_BASE + 0x314600);
961 <        if (ntohl(*lp) == 0x7d3f42a6)
960 >        }
961 >        static const uint8 pvr_read4_dat[] = {0x7d, 0x3f, 0x42, 0xa6, 0x55, 0x29, 0x84, 0x3e};
962 >        if ((base = find_rom_data(0x310000, 0x320000, pvr_read4_dat, sizeof(pvr_read4_dat))) != 0) {
963 >                D(bug("pvr_read4 %08lx\n", base));
964 >                lp = (uint32 *)(ROM_BASE + base);
965                  *lp = htonl(0x81200000 + XLM_PVR);      // lzw  r9,(theoritical PVR)
966 +        }
967  
968          // Don't read SDR1
969 <        static const uint32 sdr1_ofs[] = {0x174, 0x174, 0x174, 0x17c, 0x19c, 0x19c};
970 <        lp = (uint32 *)(ROM_BASE + loc + sdr1_ofs[ROMType]);
969 >        static const uint8 sdr1_read_dat[] = {0x7d, 0x19, 0x02, 0xa6, 0x55, 0x16, 0x81, 0xde};
970 >        if ((base = find_rom_data(0x310000, 0x320000, sdr1_read_dat, sizeof(sdr1_read_dat))) == 0) return false;
971 >        D(bug("sdr1_read %08lx\n", base));
972 >        lp = (uint32 *)(ROM_BASE + base);
973          *lp++ = htonl(0x3d00dead);              // lis  r8,0xdead               (pointer to page table)
974          *lp++ = htonl(0x3ec0001f);              // lis  r22,0x001f      (size of page table)
975          *lp = htonl(POWERPC_NOP);
976  
977 <        // Don't clear page table
978 <        static const uint32 pgtb_ofs[] = {0x198, 0x198, 0x198, 0x1a0, 0x1c0, 0x1c4};
979 <        lp = (uint32 *)(ROM_BASE + loc + pgtb_ofs[ROMType]);
977 >        // Don't clear page table, don't invalidate TLB
978 >        static const uint8 pgtb_clear_dat[] = {0x36, 0xd6, 0xff, 0xfc, 0x7e, 0xe8, 0xb1, 0x2e, 0x41, 0x81, 0xff, 0xf8};
979 >        if ((base = find_rom_data(0x310000, 0x320000, pgtb_clear_dat, sizeof(pgtb_clear_dat))) == 0) return false;
980 >        D(bug("pgtb_clear %08lx\n", base + 4));
981 >        lp = (uint32 *)(ROM_BASE + base + 4);
982          *lp = htonl(POWERPC_NOP);
983 <
984 <        // Don't invalidate TLB
964 <        static const uint32 tlb_ofs[] = {0x1a0, 0x1a0, 0x1a0, 0x1a8, 0x1c8, 0x1cc};
965 <        lp = (uint32 *)(ROM_BASE + loc + tlb_ofs[ROMType]);
983 >        D(bug("tblie %08lx\n", base + 12));
984 >        lp = (uint32 *)(ROM_BASE + base + 12);
985          *lp = htonl(POWERPC_NOP);
986  
987          // Don't create RAM descriptor table
988 <        static const uint32 desc_ofs[] = {0x350, 0x350, 0x350, 0x358, 0x378, 0x37c};
989 <        lp = (uint32 *)(ROM_BASE + loc + desc_ofs[ROMType]);
988 >        static const uint8 desc_create_dat[] = {0x97, 0xfd, 0x00, 0x04, 0x3b, 0xff, 0x10, 0x00, 0x4b, 0xff, 0xff, 0xdc};
989 >        if ((base = find_rom_data(0x310000, 0x320000, desc_create_dat, sizeof(desc_create_dat))) == 0) return false;
990 >        D(bug("desc_create %08lx\n", base))
991 >        lp = (uint32 *)(ROM_BASE + base);
992          *lp = htonl(POWERPC_NOP);
993  
994          // Don't load SRs and BATs
995 <        static const uint32 sr_ofs[] = {0x3d8, 0x3d8, 0x3d8, 0x3e0, 0x400, 0x404};
996 <        lp = (uint32 *)(ROM_BASE + loc + sr_ofs[ROMType]);
995 >        static const uint8 sr_load[] = {0x7c, 0x00, 0x04, 0xac, 0x83, 0x9d, 0x00, 0x00, 0x93, 0x81, 0x05, 0xe8};
996 >        if ((loc = find_rom_data(0x310000, 0x320000, sr_load, sizeof(sr_load))) == 0) return false;
997 >        static const uint8 sr_load_caller[] = {0x3e, 0xd6, 0xff, 0xff, 0x41, 0x81, 0xff, 0xdc, 0xb2, 0xc8, 0x00, 0x02};
998 >        if ((base = find_rom_data(0x310000, 0x320000, sr_load_caller, sizeof(sr_load_caller))) == 0) return false;
999 >        if ((base = find_rom_powerpc_branch(base + 12, 0x320000, loc)) == 0) return false;
1000 >        D(bug("sr_load %08lx, called from %08lx\n", loc, base));
1001 >        lp = (uint32 *)(ROM_BASE + base);
1002          *lp = htonl(POWERPC_NOP);
1003  
1004          // Don't mess with SRs
1005 <        static const uint32 sr2_ofs[] = {0x312118, 0x312118, 0x312118, 0x312118, 0x312118, 0x3121b4};
1006 <        lp = (uint32 *)(ROM_BASE + sr2_ofs[ROMType]);
1005 >        static const uint8 sr_load2_dat[] = {0x83, 0xa1, 0x05, 0xe8, 0x57, 0x7c, 0x3e, 0x78, 0x7f, 0xbd, 0xe0, 0x2e};
1006 >        if ((base = find_rom_data(0x310000, 0x320000, sr_load2_dat, sizeof(sr_load2_dat))) == 0) return false;
1007 >        D(bug("sr_load2 %08lx\n", base));
1008 >        lp = (uint32 *)(ROM_BASE + base);
1009          *lp = htonl(POWERPC_BLR);
1010  
1011          // Don't check performance monitor
1012 <        static const uint32 pm_ofs[] = {0x313148, 0x313148, 0x313148, 0x313148, 0x313158, 0x313218};
1013 <        lp = (uint32 *)(ROM_BASE + pm_ofs[ROMType]);
1014 <        while (ntohl(*lp) != 0x7e58eba6) lp++;
1015 <        *lp++ = htonl(POWERPC_NOP);
1016 <        while (ntohl(*lp) != 0x7e78eaa6) lp++;
1017 <        *lp++ = htonl(POWERPC_NOP);
1018 <        while (ntohl(*lp) != 0x7e59eba6) lp++;
1019 <        *lp++ = htonl(POWERPC_NOP);
1020 <        while (ntohl(*lp) != 0x7e79eaa6) lp++;
1021 <        *lp++ = htonl(POWERPC_NOP);
1022 <        while (ntohl(*lp) != 0x7e5aeba6) lp++;
1023 <        *lp++ = htonl(POWERPC_NOP);
1024 <        while (ntohl(*lp) != 0x7e7aeaa6) lp++;
1025 <        *lp++ = htonl(POWERPC_NOP);
1026 <        while (ntohl(*lp) != 0x7e5beba6) lp++;
1027 <        *lp++ = htonl(POWERPC_NOP);
1028 <        while (ntohl(*lp) != 0x7e7beaa6) lp++;
1029 <        *lp++ = htonl(POWERPC_NOP);
1030 <        while (ntohl(*lp) != 0x7e5feba6) lp++;
1031 <        *lp++ = htonl(POWERPC_NOP);
1032 <        while (ntohl(*lp) != 0x7e7feaa6) lp++;
1033 <        *lp++ = htonl(POWERPC_NOP);
1034 <        while (ntohl(*lp) != 0x7e5ceba6) lp++;
1035 <        *lp++ = htonl(POWERPC_NOP);
1008 <        while (ntohl(*lp) != 0x7e7ceaa6) lp++;
1009 <        *lp++ = htonl(POWERPC_NOP);
1010 <        while (ntohl(*lp) != 0x7e5deba6) lp++;
1011 <        *lp++ = htonl(POWERPC_NOP);
1012 <        while (ntohl(*lp) != 0x7e7deaa6) lp++;
1013 <        *lp++ = htonl(POWERPC_NOP);
1014 <        while (ntohl(*lp) != 0x7e5eeba6) lp++;
1015 <        *lp++ = htonl(POWERPC_NOP);
1016 <        while (ntohl(*lp) != 0x7e7eeaa6) lp++;
1017 <        *lp++ = htonl(POWERPC_NOP);
1012 >        static const uint8 pm_check_dat[] = {0x7e, 0x58, 0xeb, 0xa6, 0x7e, 0x53, 0x90, 0xf8, 0x7e, 0x78, 0xea, 0xa6};
1013 >        if ((base = find_rom_data(0x310000, 0x320000, pm_check_dat, sizeof(pm_check_dat))) == 0) return false;
1014 >        D(bug("pm_check %08lx\n", base));
1015 >        lp = (uint32 *)(ROM_BASE + base);
1016 >        
1017 >        static const int spr_check_list[] = {
1018 >                952 /* mmcr0 */, 953 /* pmc1 */, 954 /* pmc2 */, 955 /* sia */,
1019 >                956 /* mmcr1 */, 957 /* pmc3 */, 958 /* pmc4 */, 959 /* sda */
1020 >        };
1021 >
1022 >        for (int i = 0; i < sizeof(spr_check_list)/sizeof(spr_check_list[0]); i++) {
1023 >                int spr = spr_check_list[i];
1024 >                uint32 mtspr = 0x7e4003a6 | ((spr & 0x1f) << 16) | ((spr & 0x3e0) << 6);
1025 >                uint32 mfspr = 0x7e6002a6 | ((spr & 0x1f) << 16) | ((spr & 0x3e0) << 6);
1026 >                for (int ofs = 0; ofs < 64; ofs++) {
1027 >                        if (ntohl(lp[ofs]) == mtspr) {
1028 >                                if (ntohl(lp[ofs + 2]) != mfspr)
1029 >                                        return false;
1030 >                                D(bug("  SPR%d %08lx\n", spr, base + 4*ofs));
1031 >                                lp[ofs] = htonl(POWERPC_NOP);
1032 >                                lp[ofs + 2] = htonl(POWERPC_NOP);
1033 >                        }
1034 >                }
1035 >        }
1036  
1037          // Jump to 68k emulator
1038 <        static const uint32 jump68k_ofs[] = {0x40c, 0x40c, 0x40c, 0x414, 0x434, 0x438};
1039 <        lp = (uint32 *)(ROM_BASE + loc + jump68k_ofs[ROMType]);
1038 >        static const uint8 jump68k_dat[] = {0x7d, 0x92, 0x43, 0xa6, 0x7d, 0x5a, 0x03, 0xa6, 0x7d, 0x7b, 0x03, 0xa6};
1039 >        if ((loc = find_rom_data(0x310000, 0x320000, jump68k_dat, sizeof(jump68k_dat))) == 0) return false;
1040 >        static const uint8 jump68k_caller_dat[] = {0x85, 0x13, 0x00, 0x08, 0x56, 0xbf, 0x50, 0x3e, 0x63, 0xff, 0x0c, 0x00};
1041 >        if ((base = find_rom_data(0x310000, 0x320000, jump68k_caller_dat, sizeof(jump68k_caller_dat))) == 0) return false;
1042 >        if ((base = find_rom_powerpc_branch(base + 12, 0x320000, loc)) == 0) return false;
1043 >        D(bug("jump68k %08lx, called from %08lx\n", loc, base));
1044 >        lp = (uint32 *)(ROM_BASE + base);
1045          *lp++ = htonl(0x80610634);              // lwz  r3,0x0634(r1)   (pointer to Emulator Data)
1046          *lp++ = htonl(0x8081119c);              // lwz  r4,0x119c(r1)   (pointer to opcode table)
1047          *lp++ = htonl(0x80011184);              // lwz  r0,0x1184(r1)   (pointer to emulator init routine)
# Line 1038 | Line 1061 | static bool patch_68k_emul(void)
1061          uint32 base;
1062  
1063          // Overwrite twi instructions
1064 <        static const uint32 twi_loc[] = {0x36e680, 0x36e6c0, 0x36e6c0, 0x36e6c0, 0x36e740, 0x36e740};
1065 <        base = twi_loc[ROMType];
1064 >        static const uint8 twi_dat[] = {0x0f, 0xff, 0x00, 0x00, 0x0f, 0xff, 0x00, 0x01, 0x0f, 0xff, 0x00, 0x02};
1065 >        if ((base = find_rom_data(0x36e600, 0x36ea00, twi_dat, sizeof(twi_dat))) == 0) return false;
1066 >        D(bug("twi %08lx\n", base));
1067          lp = (uint32 *)(ROM_BASE + base);
1068          *lp++ = htonl(0x48000000 + 0x36f900 - base);            // b 0x36f900 (Emulator start)
1069          *lp++ = htonl(0x48000000 + 0x36fa00 - base - 4);        // b 0x36fa00 (Mixed mode)
# Line 1099 | Line 1123 | static bool patch_68k_emul(void)
1123          lp = (uint32 *)(ROM_BASE + 0x36f900);
1124          *lp++ = htonl(0x7c2903a6);                                      // mtctr        r1
1125   #if EMULATED_PPC
1126 <        *lp++ = POWERPC_NATIVE_OP(NATIVE_DISABLE_INTERRUPT);
1126 >        *lp++ = htonl(NativeOpcode(NATIVE_DISABLE_INTERRUPT));
1127   #else
1128          *lp++ = htonl(0x80200000 + XLM_IRQ_NEST);       // lwz          r1,XLM_IRQ_NEST
1129          *lp++ = htonl(0x38210001);                                      // addi         r1,r1,1
# Line 1133 | Line 1157 | static bool patch_68k_emul(void)
1157          lp = (uint32 *)(ROM_BASE + 0x36fa00);
1158          *lp++ = htonl(0x7c2903a6);                                      // mtctr        r1
1159   #if EMULATED_PPC
1160 <        *lp++ = POWERPC_NATIVE_OP(NATIVE_DISABLE_INTERRUPT);
1160 >        *lp++ = htonl(NativeOpcode(NATIVE_DISABLE_INTERRUPT));
1161   #else
1162          *lp++ = htonl(0x80200000 + XLM_IRQ_NEST);       // lwz          r1,XLM_IRQ_NEST
1163          *lp++ = htonl(0x38210001);                                      // addi         r1,r1,1
# Line 1167 | Line 1191 | static bool patch_68k_emul(void)
1191          lp = (uint32 *)(ROM_BASE + 0x36fb00);
1192          *lp++ = htonl(0x7c2903a6);                                      // mtctr        r1
1193   #if EMULATED_PPC
1194 <        *lp++ = POWERPC_NATIVE_OP(NATIVE_DISABLE_INTERRUPT);
1194 >        *lp++ = htonl(NativeOpcode(NATIVE_DISABLE_INTERRUPT));
1195   #else
1196          *lp++ = htonl(0x80200000 + XLM_IRQ_NEST);       // lwz          r1,XLM_IRQ_NEST
1197          *lp++ = htonl(0x38210001);                                      // addi         r1,r1,1
# Line 1201 | Line 1225 | static bool patch_68k_emul(void)
1225          lp = (uint32 *)(ROM_BASE + 0x36fc00);
1226          *lp++ = htonl(0x7c2903a6);                                      // mtctr        r1
1227   #if EMULATED_PPC
1228 <        *lp++ = POWERPC_NATIVE_OP(NATIVE_DISABLE_INTERRUPT);
1228 >        *lp++ = htonl(NativeOpcode(NATIVE_DISABLE_INTERRUPT));
1229   #else
1230          *lp++ = htonl(0x80200000 + XLM_IRQ_NEST);       // lwz          r1,XLM_IRQ_NEST
1231          *lp++ = htonl(0x38210001);                                      // addi         r1,r1,1
# Line 1259 | Line 1283 | dr_found:
1283   static bool patch_nanokernel(void)
1284   {
1285          uint32 *lp;
1286 +        uint32 base, loc;
1287  
1288          // Patch Mixed Mode trap
1289 <        lp = (uint32 *)(ROM_BASE + 0x313c90);   // Don't translate virtual->physical
1290 <        while (ntohl(*lp) != 0x3ba10320) lp++;
1291 <        lp++;
1292 <        *lp++ = htonl(0x7f7fdb78);                                      // mr           r31,r27
1293 <        lp++;
1294 <        *lp = htonl(POWERPC_NOP);
1295 <
1296 <        lp = (uint32 *)(ROM_BASE + 0x313c3c);   // Don't activate PPC exception table
1297 <        while (ntohl(*lp) != 0x39010420) lp++;
1289 >        static const uint8 virt2phys_dat[] = {0x7d, 0x1b, 0x43, 0x78, 0x3b, 0xa1, 0x03, 0x20};
1290 >        if ((base = find_rom_data(0x313000, 0x314000, virt2phys_dat, sizeof(virt2phys_dat))) == 0) return false;
1291 >        D(bug("virt2phys %08lx\n", base + 8));
1292 >        lp = (uint32 *)(ROM_BASE + base + 8);   // Don't translate virtual->physical
1293 >        lp[0] = htonl(0x7f7fdb78);                                      // mr           r31,r27
1294 >        lp[2] = htonl(POWERPC_NOP);
1295 >
1296 >        static const uint8 ppc_excp_tbl_dat[] = {0x39, 0x01, 0x04, 0x20, 0x7d, 0x13, 0x43, 0xa6};
1297 >        if ((base = find_rom_data(0x313000, 0x314000, ppc_excp_tbl_dat, sizeof(ppc_excp_tbl_dat))) == 0) return false;
1298 >        D(bug("ppc_excp_tbl %08lx\n", base));
1299 >        lp = (uint32 *)(ROM_BASE + base);               // Don't activate PPC exception table
1300          *lp++ = htonl(0x39000000 + MODE_NATIVE);        // li   r8,MODE_NATIVE
1301 <        *lp = htonl(0x91000000 + XLM_RUN_MODE); // stw  r8,XLM_RUN_MODE
1301 >        *lp = htonl(0x91000000 + XLM_RUN_MODE);         // stw  r8,XLM_RUN_MODE
1302  
1303 <        lp = (uint32 *)(ROM_BASE + 0x312e88);   // Don't modify MSR to turn on FPU
1304 <        while (ntohl(*lp) != 0x556b04e2) lp++;
1305 <        lp -= 4;
1303 >        static const uint8 save_fpu_dat[] = {0x7d, 0x00, 0x00, 0xa6, 0x61, 0x08, 0x20, 0x00, 0x7d, 0x00, 0x01, 0x24};
1304 >        if ((base = find_rom_data(0x310000, 0x314000, save_fpu_dat, sizeof(save_fpu_dat))) == 0) return false;
1305 >        D(bug("save_fpu %08lx\n", base));
1306 >        lp = (uint32 *)(ROM_BASE + base);               // Don't modify MSR to turn on FPU
1307 >        if (ntohl(lp[4]) != 0x556b04e2) return false;
1308 >        loc = ROM_BASE + base;
1309 > #if 1
1310 >        // FIXME: is that really intended?
1311          *lp++ = htonl(POWERPC_NOP);
1312          lp++;
1313          *lp++ = htonl(POWERPC_NOP);
1314          lp++;
1315          *lp = htonl(POWERPC_NOP);
1316 + #else
1317 +        lp[0] = htonl(POWERPC_NOP);
1318 +        lp[1] = htonl(POWERPC_NOP);
1319 +        lp[2] = htonl(POWERPC_NOP);
1320 +        lp[3] = htonl(POWERPC_NOP);
1321 + #endif
1322  
1323 <        lp = (uint32 *)(ROM_BASE + 0x312b3c);   // Always save FPU state
1324 <        while (ntohl(*lp) != 0x81010668) lp++;
1325 <        lp--;
1323 >        static const uint8 save_fpu_caller_dat[] = {0x93, 0xa6, 0x01, 0xec, 0x93, 0xc6, 0x01, 0xf4, 0x93, 0xe6, 0x01, 0xfc, 0x40};
1324 >        if ((base = find_rom_data(0x310000, 0x314000, save_fpu_caller_dat, sizeof(save_fpu_caller_dat))) == 0) return false;
1325 >        D(bug("save_fpu_caller %08lx\n", base + 12));
1326 >        if (powerpc_branch_target(ROM_BASE + base + 12) != loc) return false;
1327 >        lp = (uint32 *)(ROM_BASE + base + 12);  // Always save FPU state
1328          *lp = htonl(0x48000000 | (ntohl(*lp) & 0xffff));        // bl   0x00312e88
1329  
1330 <        lp = (uint32 *)(ROM_BASE + 0x312b44);   // Don't read DEC
1331 <        while (ntohl(*lp) != 0x7ff602a6) lp++;
1332 <        *lp = htonl(0x3be00000);                                        // li   r31,0
1333 <
1334 <        lp = (uint32 *)(ROM_BASE + 0x312b50);   // Don't write DEC
1295 <        while (ntohl(*lp) != 0x7d1603a6) lp++;
1330 >        static const uint8 mdec_dat[] = {0x7f, 0xf6, 0x02, 0xa6, 0x2c, 0x08, 0x00, 0x00, 0x93, 0xe1, 0x06, 0x68, 0x7d, 0x16, 0x03, 0xa6};
1331 >        if ((base = find_rom_data(0x310000, 0x314000, mdec_dat, sizeof(mdec_dat))) == 0) return false;
1332 >        D(bug("mdec %08lx\n", base));
1333 >        lp = (uint32 *)(ROM_BASE + base);               // Don't modify DEC
1334 >        lp[0] = htonl(0x3be00000);                                      // li   r31,0
1335   #if 1
1336 <        *lp++ = htonl(POWERPC_NOP);
1337 <        *lp = htonl(POWERPC_NOP);
1336 >        lp[3] = htonl(POWERPC_NOP);
1337 >        lp[4] = htonl(POWERPC_NOP);
1338   #else
1339 <        *lp++ = htonl(0x39000040);                                      // li   r8,0x40
1340 <        *lp = htonl(0x990600e4);                                        // stb  r8,0xe4(r6)
1339 >        lp[3] = htonl(0x39000040);                                      // li   r8,0x40
1340 >        lp[4] = htonl(0x990600e4);                                      // stb  r8,0xe4(r6)
1341   #endif
1342  
1343 <        lp = (uint32 *)(ROM_BASE + 0x312b9c);   // Always restore FPU state
1344 <        while (ntohl(*lp) != 0x7c00092d) lp++;
1345 <        lp--;
1343 >        static const uint8 restore_fpu_caller_dat[] = {0x81, 0x06, 0x00, 0xf4, 0x81, 0x46, 0x00, 0xfc, 0x7d, 0x09, 0x03, 0xa6, 0x40};
1344 >        if ((base = find_rom_data(0x310000, 0x314000, restore_fpu_caller_dat, sizeof(restore_fpu_caller_dat))) == 0) return false;
1345 >        D(bug("restore_fpu_caller %08lx\n", base + 12));
1346 >        lp = (uint32 *)(ROM_BASE + base + 12);  // Always restore FPU state
1347          *lp = htonl(0x48000000 | (ntohl(*lp) & 0xffff));        // bl   0x00312ddc
1348  
1349 <        lp = (uint32 *)(ROM_BASE + 0x312a68);   // Don't activate 68k exception table
1350 <        while (ntohl(*lp) != 0x39010360) lp++;
1349 >        static const uint8 m68k_excp_tbl_dat[] = {0x81, 0x21, 0x06, 0x58, 0x39, 0x01, 0x03, 0x60, 0x7d, 0x13, 0x43, 0xa6};
1350 >        if ((base = find_rom_data(0x310000, 0x314000, m68k_excp_tbl_dat, sizeof(m68k_excp_tbl_dat))) == 0) return false;
1351 >        D(bug("m68k_excp %08lx\n", base + 4));
1352 >        lp = (uint32 *)(ROM_BASE + base + 4);   // Don't activate 68k exception table
1353          *lp++ = htonl(0x39000000 + MODE_68K);           // li   r8,MODE_68K
1354          *lp = htonl(0x91000000 + XLM_RUN_MODE);         // stw  r8,XLM_RUN_MODE
1355  
1356          // Patch 68k emulator trap routine
1357 <        lp = (uint32 *)(ROM_BASE + 0x312994);   // Always restore FPU state
1358 <        while (ntohl(*lp) != 0x39260040) lp++;
1359 <        lp--;
1357 >        static const uint8 restore_fpu_caller2_dat[] = {0x81, 0x86, 0x00, 0x8c, 0x80, 0x66, 0x00, 0x94, 0x80, 0x86, 0x00, 0x9c, 0x40};
1358 >        if ((base = find_rom_data(0x310000, 0x314000, restore_fpu_caller2_dat, sizeof(restore_fpu_caller2_dat))) == 0) return false;
1359 >        D(bug("restore_fpu_caller2 %08lx\n", base + 12));
1360 >        loc = powerpc_branch_target(ROM_BASE + base + 12) - ROM_BASE;
1361 >        lp = (uint32 *)(ROM_BASE + base + 12);  // Always restore FPU state
1362          *lp = htonl(0x48000000 | (ntohl(*lp) & 0xffff));        // bl   0x00312dd4
1363  
1364 <        lp = (uint32 *)(ROM_BASE + 0x312dd8);   // Don't modify MSR to turn on FPU
1365 <        while (ntohl(*lp) != 0x810600e4) lp++;
1366 <        lp--;
1364 >        static const uint8 restore_fpu_dat[] = {0x55, 0x68, 0x04, 0xa5, 0x4c, 0x82, 0x00, 0x20, 0x81, 0x06, 0x00, 0xe4};
1365 >        if ((base = find_rom_data(0x310000, 0x314000, restore_fpu_dat, sizeof(restore_fpu_dat))) == 0) return false;
1366 >        D(bug("restore_fpu %08lx\n", base));
1367 >        if (base != loc) return false;
1368 >        lp = (uint32 *)(ROM_BASE + base + 4);   // Don't modify MSR to turn on FPU
1369          *lp++ = htonl(POWERPC_NOP);
1370          lp += 2;
1371          *lp++ = htonl(POWERPC_NOP);
# Line 1329 | Line 1375 | static bool patch_nanokernel(void)
1375          *lp = htonl(POWERPC_NOP);
1376  
1377          // Patch trap return routine
1378 <        lp = (uint32 *)(ROM_BASE + 0x312c20);
1379 <        while (ntohl(*lp) != 0x7d5a03a6) lp++;
1378 >        static const uint8 trap_return_dat[] = {0x80, 0xc1, 0x00, 0x18, 0x80, 0x21, 0x00, 0x04, 0x4c, 0x00, 0x00, 0x64};
1379 >        if ((base = find_rom_data(0x312000, 0x320000, trap_return_dat, sizeof(trap_return_dat))) == 0) return false;
1380 >        D(bug("trap_return %08lx\n", base + 8));
1381 >        lp = (uint32 *)(ROM_BASE + base + 8);   // Replace rfi
1382 >        *lp = htonl(POWERPC_BCTR);
1383 >
1384 >        while (ntohl(*lp) != 0x7d5a03a6) lp--;
1385          *lp++ = htonl(0x7d4903a6);                                      // mtctr        r10
1386          *lp++ = htonl(0x7daff120);                                      // mtcr r13
1387 <        *lp = htonl(0x48000000 + 0x8000 - (((uint32)lp - ROM_BASE) & 0xffff));  // b            ROM_BASE+0x318000
1388 <        uint32 xlp = ((uint32)(lp+1) - ROM_BASE) & 0xffff;
1338 <
1339 <        lp = (uint32 *)(ROM_BASE + 0x312c50);   // Replace rfi
1340 <        while (ntohl(*lp) != 0x4c000064) lp++;
1341 <        *lp = htonl(POWERPC_BCTR);
1387 >        *lp = htonl(0x48000000 + ((0x318000 - ((uint32)lp - ROM_BASE)) & 0x03fffffc));  // b            ROM_BASE+0x318000
1388 >        uint32 npc = (uint32)(lp + 1) - ROM_BASE;
1389  
1390          lp = (uint32 *)(ROM_BASE + 0x318000);
1391   #if EMULATED_PPC
1392 <        *lp++ = POWERPC_NATIVE_OP(NATIVE_ENABLE_INTERRUPT);
1393 <        *lp = htonl(0x48000000 + ((xlp - 0x8004) & 0x03fffffc));        // b            ROM_BASE+0x312c2c
1392 >        *lp++ = htonl(NativeOpcode(NATIVE_ENABLE_INTERRUPT));
1393 >        *lp = htonl(0x48000000 + ((npc - 0x318004) & 0x03fffffc));      // b            ROM_BASE+0x312c2c
1394   #else
1395          *lp++ = htonl(0x81400000 + XLM_IRQ_NEST);       // lwz  r10,XLM_IRQ_NEST
1396          *lp++ = htonl(0x394affff);                                      // subi r10,r10,1
1397          *lp++ = htonl(0x91400000 + XLM_IRQ_NEST);       // stw  r10,XLM_IRQ_NEST
1398 <        *lp = htonl(0x48000000 + ((xlp - 0x800c) & 0x03fffffc));        // b            ROM_BASE+0x312c2c
1398 >        *lp = htonl(0x48000000 + ((npc - 0x31800c) & 0x03fffffc));      // b            ROM_BASE+0x312c2c
1399   #endif
1400  
1401   /*
# Line 1370 | Line 1417 | static bool patch_68k(void)
1417          uint32 *lp;
1418          uint16 *wp;
1419          uint8 *bp;
1420 <        uint32 base;
1420 >        uint32 base, loc;
1421  
1422          // Remove 68k RESET instruction
1423          static const uint8 reset_dat[] = {0x4e, 0x70};
# Line 1611 | Line 1658 | static bool patch_68k(void)
1658          *wp = htons(M68K_NOP);
1659  
1660          // Don't initialize SCC (via 0x1ac)
1661 <        static const uint8 scc_init_dat[] = {0x48, 0xe7, 0x38, 0xfe};
1662 <        if ((base = find_rom_data(0x190, 0x1f0, scc_init_dat, sizeof(scc_init_dat))) == 0) return false;
1661 >        static const uint8 scc_init_caller_dat[] = {0x21, 0xce, 0x01, 0x08, 0x22, 0x78, 0x0d, 0xd8};
1662 >        if ((base = find_rom_data(0x180, 0x1f0, scc_init_caller_dat, sizeof(scc_init_caller_dat))) == 0) return false;
1663 >        D(bug("scc_init_caller %08lx\n", base + 12));
1664 >        wp = (uint16 *)(ROM_BASE + base + 12);
1665 >        loc = ntohs(wp[1]) + ((uintptr)wp - ROM_BASE) + 2;
1666 >        static const uint8 scc_init_dat[] = {0x20, 0x78, 0x01, 0xdc, 0x22, 0x78, 0x01, 0xd8};
1667 >        if ((base = find_rom_data(loc, loc + 0x80, scc_init_dat, sizeof(scc_init_dat))) == 0) return false;
1668          D(bug("scc_init %08lx\n", base));
1669 <        wp = (uint16 *)(ROM_BASE + base - 2);
1618 <        wp = (uint16 *)(ROM_BASE + ntohs(*wp) + base - 2);
1669 >        wp = (uint16 *)(ROM_BASE + base);
1670          *wp++ = htons(M68K_EMUL_OP_RESET);
1671          *wp = htons(M68K_RTS);
1672  
# Line 1842 | Line 1893 | static bool patch_68k(void)
1893          *wp = htons(M68K_RTS);
1894  
1895          // Don't install Time Manager task for 60Hz interrupt (Enable60HzInts, via 0x2b8)
1896 <        if (ROMType == ROMTYPE_NEWWORLD) {
1896 >        if (ROMType == ROMTYPE_NEWWORLD || ROMType == ROMTYPE_GOSSAMER) {
1897                  static const uint8 tm_task_dat[] = {0x30, 0x3c, 0x4e, 0x2b, 0xa9, 0xc9};
1898 <                if ((base = find_rom_data(0x2e0, 0x320, tm_task_dat, sizeof(tm_task_dat))) == 0) return false;
1898 >                if ((base = find_rom_data(0x2a0, 0x320, tm_task_dat, sizeof(tm_task_dat))) == 0) return false;
1899                  D(bug("tm_task %08lx\n", base));
1900 <                wp = (uint16 *)(ROM_BASE + base + 28); // FIXME: this is not right for all nw ROMs
1900 >                wp = (uint16 *)(ROM_BASE + base + 28);
1901                  *wp++ = htons(M68K_NOP);
1902                  *wp++ = htons(M68K_NOP);
1903                  *wp++ = htons(M68K_NOP);
1904                  *wp++ = htons(M68K_NOP);
1905                  *wp++ = htons(M68K_NOP);
1906                  *wp = htons(M68K_NOP);
1856        } else if (ROMType == ROMTYPE_GOSSAMER) {
1857                static const uint8 tm_task_dat[] = {0x30, 0x3c, 0x4e, 0x2b, 0xa9, 0xc9};
1858                if ((base = find_rom_data(0x2a0, 0x2e0, tm_task_dat, sizeof(tm_task_dat))) == 0) return false;
1859                D(bug("tm_task %08lx\n", base));
1860                wp = (uint16 *)(ROM_BASE + base + 22);
1861                *wp++ = htons(M68K_NOP);
1862                *wp++ = htons(M68K_NOP);
1863                *wp++ = htons(M68K_NOP);
1907          } else {
1908                  static const uint8 tm_task_dat[] = {0x20, 0x3c, 0x73, 0x79, 0x73, 0x61};
1909                  if ((base = find_rom_data(0x280, 0x300, tm_task_dat, sizeof(tm_task_dat))) == 0) return false;
# Line 1907 | Line 1950 | static bool patch_68k(void)
1950                  *lp = htonl(0x38600000);                // li   r3,0
1951          }
1952  
1953 +        // FIXME: Fake reading from [HpChk]+4 (the callchain reports some function from DriverServicesLib)
1954 +        if (1) {
1955 +                uint32 hpchk_offset = find_rom_resource(FOURCC('n','l','i','b'), 10);
1956 +                static const uint8 hpchk_dat[] = {0x80, 0x80, 0x03, 0x16, 0x94, 0x21, 0xff, 0xb0, 0x83, 0xc4, 0x00, 0x04};
1957 +                if ((base = find_rom_data(hpchk_offset, hpchk_offset + 0x3000, hpchk_dat, sizeof(hpchk_dat))) == 0) return false;
1958 +                D(bug("hpchk %08lx\n", base));
1959 +                lp = (uint32 *)(ROM_BASE + base);
1960 +                *lp = htonl(0x80800000 + XLM_ZERO_PAGE);                // lwz  r4,(zero page)
1961 +        }
1962 +
1963          // Patch Name Registry
1964          static const uint8 name_reg_dat[] = {0x70, 0xff, 0xab, 0xeb};
1965          if ((base = find_rom_data(0x300, 0x380, name_reg_dat, sizeof(name_reg_dat))) == 0) return false;
# Line 2030 | Line 2083 | static bool patch_68k(void)
2083          memcpy((void *)(ROM_BASE + sony_offset + 0x200), cdrom_driver, sizeof(cdrom_driver));
2084  
2085          // Install serial drivers
2086 <        memcpy_powerpc_code((void *)(ROM_BASE + sony_offset + 0x300), ain_driver, sizeof(ain_driver));
2087 <        memcpy_powerpc_code((void *)(ROM_BASE + sony_offset + 0x400), aout_driver, sizeof(aout_driver));
2088 <        memcpy_powerpc_code((void *)(ROM_BASE + sony_offset + 0x500), bin_driver, sizeof(bin_driver));
2089 <        memcpy_powerpc_code((void *)(ROM_BASE + sony_offset + 0x600), bout_driver, sizeof(bout_driver));
2086 >        gen_ain_driver( ROM_BASE + sony_offset + 0x300);
2087 >        gen_aout_driver(ROM_BASE + sony_offset + 0x400);
2088 >        gen_bin_driver( ROM_BASE + sony_offset + 0x500);
2089 >        gen_bout_driver(ROM_BASE + sony_offset + 0x600);
2090  
2091          // Copy icons to ROM
2092          SonyDiskIconAddr = ROM_BASE + sony_offset + 0x800;
# Line 2175 | Line 2228 | static bool patch_68k(void)
2228          lp = (uint32 *)(ROM_BASE + ntohl(*lp));
2229          lp[0xa9fd & 0x3ff] = htonl(GET_SCRAP_PATCH_SPACE);
2230  
2178 #if __BEOS__
2231          // Patch SynchIdleTime()
2232          if (PrefsFindBool("idlewait")) {
2233                  wp = (uint16 *)(ROM_BASE + find_rom_trap(0xabf7) + 4);  // SynchIdleTime()
2234                  D(bug("SynchIdleTime at %08lx\n", wp));
2235 <                if (ntohs(*wp) == 0x2078) {
2235 >                if (ntohs(*wp) == 0x2078) {                                                             // movea.l      ExpandMem,a0
2236                          *wp++ = htons(M68K_EMUL_OP_IDLE_TIME);
2237                          *wp = htons(M68K_NOP);
2238 <                } else {
2238 >                }
2239 >                else if (ntohs(*wp) == 0x70fe)                                                  // moveq        #-2,d0
2240 >                        *wp++ = htons(M68K_EMUL_OP_IDLE_TIME_2);
2241 >                else {
2242                          D(bug("SynchIdleTime patch not installed\n"));
2243                  }
2244          }
2190 #endif
2245  
2246          // Construct list of all sifters used by sound components in ROM
2247          D(bug("Searching for sound components with type sdev in ROM\n"));
# Line 2235 | Line 2289 | void InstallDrivers(void)
2289   {
2290          D(bug("Installing drivers...\n"));
2291          M68kRegisters r;
2292 <        uint8 pb[SIZEOF_IOParam];
2292 >        SheepArray<SIZEOF_IOParam> pb_var;
2293 >        const uintptr pb = pb_var.addr();
2294  
2295          // Install floppy driver
2296 <        if (ROMType == ROMTYPE_NEWWORLD) {
2296 >        if (ROMType == ROMTYPE_NEWWORLD || ROMType == ROMTYPE_GOSSAMER) {
2297  
2298 <                // Force installation of floppy driver with NewWorld ROMs
2298 >                // Force installation of floppy driver with NewWorld and Gossamer ROMs
2299                  r.a[0] = ROM_BASE + sony_offset;
2300                  r.d[0] = (uint32)SonyRefNum;
2301                  Execute68kTrap(0xa43d, &r);             // DrvrInstallRsrvMem()
# Line 2251 | Line 2306 | void InstallDrivers(void)
2306                  WriteMacInt16(dce + dCtlFlags, SonyDriverFlags);
2307          }
2308  
2309 < #if DISABLE_SCSI && 0
2309 > #if DISABLE_SCSI && HAVE_SIGSEGV_SKIP_INSTRUCTION
2310          // Fake SCSIGlobals
2311 <        static const uint8 fake_scsi_globals[32] = {0,};
2257 <        WriteMacInt32(0xc0c, (uint32)fake_scsi_globals);
2311 >        WriteMacInt32(0xc0c, SheepMem::ZeroPage());
2312   #endif
2313  
2314          // Open .Sony driver
2315 <        WriteMacInt8((uint32)pb + ioPermssn, 0);
2316 <        WriteMacInt32((uint32)pb + ioNamePtr, (uint32)"\005.Sony");
2317 <        r.a[0] = (uint32)pb;
2315 >        SheepString sony_str("\005.Sony");
2316 >        WriteMacInt8(pb + ioPermssn, 0);
2317 >        WriteMacInt32(pb + ioNamePtr, sony_str.addr());
2318 >        r.a[0] = pb;
2319          Execute68kTrap(0xa000, &r);             // Open()
2320  
2321          // Install disk driver
# Line 2274 | Line 2329 | void InstallDrivers(void)
2329          WriteMacInt16(dce + dCtlFlags, DiskDriverFlags);
2330  
2331          // Open disk driver
2332 <        WriteMacInt32((uint32)pb + ioNamePtr, (uint32)"\005.Disk");
2333 <        r.a[0] = (uint32)pb;
2332 >        SheepString disk_str("\005.Disk");
2333 >        WriteMacInt32(pb + ioNamePtr, disk_str.addr());
2334 >        r.a[0] = pb;
2335          Execute68kTrap(0xa000, &r);             // Open()
2336  
2337          // Install CD-ROM driver unless nocdrom option given
# Line 2292 | Line 2348 | void InstallDrivers(void)
2348                  WriteMacInt16(dce + dCtlFlags, CDROMDriverFlags);
2349  
2350                  // Open CD-ROM driver
2351 <                WriteMacInt32((uint32)pb + ioNamePtr, (uint32)"\010.AppleCD");
2352 <                r.a[0] = (uint32)pb;
2351 >                SheepString apple_cd("\010.AppleCD");
2352 >                WriteMacInt32(pb + ioNamePtr, apple_cd.addr());
2353 >                r.a[0] = pb;
2354                  Execute68kTrap(0xa000, &r);             // Open()
2355          }
2356  

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