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/* |
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* basilisk_glue.cpp - Glue UAE CPU to Basilisk II CPU engine interface |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* Basilisk II (C) 1997-2008 Christian Bauer |
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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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*/ |
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "main.h" |
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#include "prefs.h" |
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#include "emul_op.h" |
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#include "rom_patches.h" |
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#include "timer.h" |
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#include "m68k.h" |
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#include "memory.h" |
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#include "readcpu.h" |
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#include "newcpu.h" |
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#include "compiler.h" |
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#include "compiler/compemu.h" |
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// RAM and ROM pointers |
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uint32 RAMBaseMac; // RAM base (Mac address space) |
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uint32 RAMBaseMac = 0; // RAM base (Mac address space) gb-- initializer is important |
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uint8 *RAMBaseHost; // RAM base (host address space) |
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uint32 RAMSize; // Size of RAM |
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uint32 ROMBaseMac; // ROM base (Mac address space) |
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int MacFrameLayout; // Frame buffer layout |
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#endif |
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#if DIRECT_ADDRESSING |
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uintptr MEMBaseDiff; // Global offset between a Mac address and its Host equivalent |
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#endif |
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#if USE_JIT |
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bool UseJIT = false; |
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#endif |
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// From newcpu.cpp |
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extern int quit_program; |
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extern bool quit_program; |
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/* |
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{ |
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#if REAL_ADDRESSING |
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// Mac address space = host address space |
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RAMBaseMac = (uint32)RAMBaseHost; |
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ROMBaseMac = (uint32)ROMBaseHost; |
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RAMBaseMac = (uintptr)RAMBaseHost; |
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ROMBaseMac = (uintptr)ROMBaseHost; |
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#elif DIRECT_ADDRESSING |
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// Mac address space = host address space minus constant offset (MEMBaseDiff) |
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// NOTE: MEMBaseDiff is set up in main_unix.cpp/main() |
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RAMBaseMac = 0; |
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ROMBaseMac = Host2MacAddr(ROMBaseHost); |
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#else |
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// Initialize UAE memory banks |
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RAMBaseMac = 0; |
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#endif |
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init_m68k(); |
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#if USE_JIT |
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UseJIT = compiler_use_jit(); |
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if (UseJIT) |
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compiler_init(); |
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#endif |
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return true; |
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} |
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void Exit680x0(void) |
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{ |
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#if USE_JIT |
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if (UseJIT) |
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compiler_exit(); |
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#endif |
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exit_m68k(); |
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} |
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/* |
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* Initialize memory mapping of frame buffer (called upon video mode change) |
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*/ |
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void InitFrameBufferMapping(void) |
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{ |
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#if !REAL_ADDRESSING && !DIRECT_ADDRESSING |
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memory_init(); |
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#endif |
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} |
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/* |
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* Reset and start 680x0 emulation (doesn't return) |
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*/ |
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void Start680x0(void) |
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{ |
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m68k_reset(); |
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m68k_go(true); |
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#if USE_JIT |
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if (UseJIT) |
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m68k_compile_execute(); |
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else |
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#endif |
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m68k_execute(); |
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} |
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void TriggerInterrupt(void) |
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{ |
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regs.spcflags |= SPCFLAG_INT; |
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idle_resume(); |
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SPCFLAGS_SET( SPCFLAG_INT ); |
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} |
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void TriggerNMI(void) |
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{ |
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//!! not implemented yet |
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} |
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// Execute trap |
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m68k_setpc(m68k_areg(regs, 7)); |
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fill_prefetch_0(); |
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quit_program = 0; |
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m68k_go(true); |
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quit_program = false; |
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m68k_execute(); |
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// Clean up stack |
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m68k_areg(regs, 7) += 4; |
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r->d[i] = m68k_dreg(regs, i); |
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for (i=0; i<7; i++) |
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r->a[i] = m68k_areg(regs, i); |
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quit_program = 0; |
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quit_program = false; |
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} |
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// Execute routine |
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m68k_setpc(addr); |
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fill_prefetch_0(); |
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quit_program = 0; |
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m68k_go(true); |
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quit_program = false; |
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m68k_execute(); |
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// Clean up stack |
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m68k_areg(regs, 7) += 2; |
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r->d[i] = m68k_dreg(regs, i); |
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for (i=0; i<7; i++) |
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r->a[i] = m68k_areg(regs, i); |
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quit_program = 0; |
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quit_program = false; |
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} |
