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/* |
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* rom_patches.cpp - ROM patches |
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* |
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< |
* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
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* SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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const uint32 CHECK_LOAD_PATCH_SPACE = 0x2fcf00; |
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const uint32 PUT_SCRAP_PATCH_SPACE = 0x2fcf80; |
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const uint32 GET_SCRAP_PATCH_SPACE = 0x2fcfc0; |
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const uint32 ADDR_MAP_PATCH_SPACE = 0x2fd000; |
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const uint32 ADDR_MAP_PATCH_SPACE = 0x2fd100; |
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// Global variables |
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int ROMType; // ROM type |
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/* |
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* Check that requested ROM patch space is really available |
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*/ |
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|
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static bool check_rom_patch_space(uint32 base, uint32 size) |
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{ |
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size = (size + 3) & -4; |
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for (int i = 0; i < size; i += 4) { |
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uint32 x = ntohl(*(uint32 *)(ROM_BASE + base + i)); |
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if (x != 0x6b636b63 && x != 0) |
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return false; |
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} |
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return true; |
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} |
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/* |
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* List of audio sifters installed in ROM and System file |
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*/ |
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return false; |
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// Check that other ROM addresses point to really free regions |
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if (ntohl(*(uint32 *)(ROM_BASE + CHECK_LOAD_PATCH_SPACE)) != 0x6b636b63) |
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if (!check_rom_patch_space(CHECK_LOAD_PATCH_SPACE, 0x40)) |
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return false; |
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if (ntohl(*(uint32 *)(ROM_BASE + PUT_SCRAP_PATCH_SPACE)) != 0x6b636b63) |
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if (!check_rom_patch_space(PUT_SCRAP_PATCH_SPACE, 0x40)) |
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return false; |
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if (ntohl(*(uint32 *)(ROM_BASE + GET_SCRAP_PATCH_SPACE)) != 0x6b636b63) |
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if (!check_rom_patch_space(GET_SCRAP_PATCH_SPACE, 0x40)) |
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return false; |
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if (ntohl(*(uint32 *)(ROM_BASE + ADDR_MAP_PATCH_SPACE)) != 0x6b636b63) |
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if (!check_rom_patch_space(ADDR_MAP_PATCH_SPACE - 10 * 4, 0x100)) |
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return false; |
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// Apply patches |
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lp[8] = htonl(0x00800002); // TLB total size/TLB assoc |
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break; |
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// case 11: // X704? |
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case 12: // ??? |
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case 12: // 7400, 7410 |
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case 0x800c: |
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lp[0] = htonl(0x1000); // Page size |
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lp[1] = htonl(0x8000); // Data cache size |
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lp[2] = htonl(0x8000); // Inst cache size |
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D(bug("scc_init_caller %08lx\n", base + 12)); |
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wp = (uint16 *)(ROM_BASE + base + 12); |
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loc = ntohs(wp[1]) + ((uintptr)wp - ROM_BASE) + 2; |
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static const uint8 scc_init_dat[] = {0x08, 0x38, 0x00, 0x03, 0x0d, 0xd3, 0x67, 0x12, 0x20, 0x78, 0x01, 0xdc, 0x22, 0x78, 0x01, 0xd8}; |
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if ((base = find_rom_data(loc, loc + 0x80, scc_init_dat, sizeof(scc_init_dat))) != loc) return false; |
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static const uint8 scc_init_dat[] = {0x20, 0x78, 0x01, 0xdc, 0x22, 0x78, 0x01, 0xd8}; |
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if ((base = find_rom_data(loc, loc + 0x80, scc_init_dat, sizeof(scc_init_dat))) == 0) return false; |
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D(bug("scc_init %08lx\n", base)); |
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wp = (uint16 *)(ROM_BASE + base); |
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*wp++ = htons(M68K_EMUL_OP_RESET); |
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WriteMacInt16(dce + dCtlFlags, SonyDriverFlags); |
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} |
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#if DISABLE_SCSI && 0 |
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#if DISABLE_SCSI && HAVE_SIGSEGV_SKIP_INSTRUCTION |
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// Fake SCSIGlobals |
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WriteMacInt32(0xc0c, SheepMem::ZeroPage()); |
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#endif |
