src/uae_cpu/basilisk_glue.cpp

/*
 *  basilisk_glue.cpp - Glue UAE CPU to Basilisk II CPU engine interface
 *
 *  Basilisk II (C) 1997-2008 Christian Bauer
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "sysdeps.h"

#include "cpu_emulation.h"
#include "main.h"
#include "prefs.h"
#include "emul_op.h"
#include "rom_patches.h"
#include "timer.h"
#include "m68k.h"
#include "memory.h"
#include "readcpu.h"
#include "newcpu.h"
#include "compiler/compemu.h"


// RAM and ROM pointers
uint32 RAMBaseMac = 0;          // RAM base (Mac address space) gb-- initializer is important
uint8 *RAMBaseHost;                     // RAM base (host address space)
uint32 RAMSize;                         // Size of RAM
uint32 ROMBaseMac;                      // ROM base (Mac address space)
uint8 *ROMBaseHost;                     // ROM base (host address space)
uint32 ROMSize;                         // Size of ROM

#if !REAL_ADDRESSING
// Mac frame buffer
uint8 *MacFrameBaseHost;        // Frame buffer base (host address space)
uint32 MacFrameSize;            // Size of frame buffer
int MacFrameLayout;                     // Frame buffer layout
#endif

#if DIRECT_ADDRESSING
uintptr MEMBaseDiff;            // Global offset between a Mac address and its Host equivalent
#endif

#if USE_JIT
bool UseJIT = false;
#endif

// From newcpu.cpp
extern bool quit_program;


/*
 *  Initialize 680x0 emulation, CheckROM() must have been called first
 */

bool Init680x0(void)
{
#if REAL_ADDRESSING
        // Mac address space = host address space
        RAMBaseMac = (uintptr)RAMBaseHost;
        ROMBaseMac = (uintptr)ROMBaseHost;
#elif DIRECT_ADDRESSING
        // Mac address space = host address space minus constant offset (MEMBaseDiff)
        // NOTE: MEMBaseDiff is set up in main_unix.cpp/main()
        RAMBaseMac = 0;
        ROMBaseMac = Host2MacAddr(ROMBaseHost);
#else
        // Initialize UAE memory banks
        RAMBaseMac = 0;
        switch (ROMVersion) {
                case ROM_VERSION_64K:
                case ROM_VERSION_PLUS:
                case ROM_VERSION_CLASSIC:
                        ROMBaseMac = 0x00400000;
                        break;
                case ROM_VERSION_II:
                        ROMBaseMac = 0x00a00000;
                        break;
                case ROM_VERSION_32:
                        ROMBaseMac = 0x40800000;
                        break;
                default:
                        return false;
        }
        memory_init();
#endif

        init_m68k();
#if USE_JIT
        UseJIT = compiler_use_jit();
        if (UseJIT)
            compiler_init();
#endif
        return true;
}


/*
 *  Deinitialize 680x0 emulation
 */

void Exit680x0(void)
{
#if USE_JIT
    if (UseJIT)
        compiler_exit();
#endif
        exit_m68k();
}


/*
 *  Initialize memory mapping of frame buffer (called upon video mode change)
 */

void InitFrameBufferMapping(void)
{
#if !REAL_ADDRESSING && !DIRECT_ADDRESSING
        memory_init();
#endif
}

/*
 *  Reset and start 680x0 emulation (doesn't return)
 */

void Start680x0(void)
{
        m68k_reset();
#if USE_JIT
    if (UseJIT)
        m68k_compile_execute();
    else
#endif
        m68k_execute();
}


/*
 *  Trigger interrupt
 */

void TriggerInterrupt(void)
{
        idle_resume();
        SPCFLAGS_SET( SPCFLAG_INT );
}

void TriggerNMI(void)
{
        //!! not implemented yet
}


/*
 *  Get 68k interrupt level
 */

int intlev(void)
{
        return InterruptFlags ? 1 : 0;
}


/*
 *  Execute MacOS 68k trap
 *  r->a[7] and r->sr are unused!
 */

void Execute68kTrap(uint16 trap, struct M68kRegisters *r)
{
        int i;

        // Save old PC
        uaecptr oldpc = m68k_getpc();

        // Set registers
        for (i=0; i<8; i++)
                m68k_dreg(regs, i) = r->d[i];
        for (i=0; i<7; i++)
                m68k_areg(regs, i) = r->a[i];

        // Push trap and EXEC_RETURN on stack
        m68k_areg(regs, 7) -= 2;
        put_word(m68k_areg(regs, 7), M68K_EXEC_RETURN);
        m68k_areg(regs, 7) -= 2;
        put_word(m68k_areg(regs, 7), trap);

        // Execute trap
        m68k_setpc(m68k_areg(regs, 7));
        fill_prefetch_0();
        quit_program = false;
        m68k_execute();

        // Clean up stack
        m68k_areg(regs, 7) += 4;

        // Restore old PC
        m68k_setpc(oldpc);
        fill_prefetch_0();

        // Get registers
        for (i=0; i<8; i++)
                r->d[i] = m68k_dreg(regs, i);
        for (i=0; i<7; i++)
                r->a[i] = m68k_areg(regs, i);
        quit_program = false;
}


/*
 *  Execute 68k subroutine
 *  The executed routine must reside in UAE memory!
 *  r->a[7] and r->sr are unused!
 */

void Execute68k(uint32 addr, struct M68kRegisters *r)
{
        int i;

        // Save old PC
        uaecptr oldpc = m68k_getpc();

        // Set registers
        for (i=0; i<8; i++)
                m68k_dreg(regs, i) = r->d[i];
        for (i=0; i<7; i++)
                m68k_areg(regs, i) = r->a[i];

        // Push EXEC_RETURN and faked return address (points to EXEC_RETURN) on stack
        m68k_areg(regs, 7) -= 2;
        put_word(m68k_areg(regs, 7), M68K_EXEC_RETURN);
        m68k_areg(regs, 7) -= 4;
        put_long(m68k_areg(regs, 7), m68k_areg(regs, 7) + 4);

        // Execute routine
        m68k_setpc(addr);
        fill_prefetch_0();
        quit_program = false;
        m68k_execute();

        // Clean up stack
        m68k_areg(regs, 7) += 2;

        // Restore old PC
        m68k_setpc(oldpc);
        fill_prefetch_0();

        // Get registers
        for (i=0; i<8; i++)
                r->d[i] = m68k_dreg(regs, i);
        for (i=0; i<7; i++)
                r->a[i] = m68k_areg(regs, i);
        quit_program = false;
}
Revision:	1.20
Committed:	2008-01-01T09:40:35Z (16 years, 10 months ago) by gbeauche
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.19:	+1 -1 lines
Log Message:	Happy New Year!
#	User	Rev	Content
1	cebix	1.1	/*
2			* basilisk_glue.cpp - Glue UAE CPU to Basilisk II CPU engine interface
3			*
4	gbeauche	1.20	* Basilisk II (C) 1997-2008 Christian Bauer
5	cebix	1.1	*
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
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21			#include "sysdeps.h"
22	cebix	1.4
23	cebix	1.1	#include "cpu_emulation.h"
24			#include "main.h"
25	gbeauche	1.14	#include "prefs.h"
26	cebix	1.1	#include "emul_op.h"
27			#include "rom_patches.h"
28	gbeauche	1.18	#include "timer.h"
29	cebix	1.1	#include "m68k.h"
30			#include "memory.h"
31			#include "readcpu.h"
32			#include "newcpu.h"
33	gbeauche	1.14	#include "compiler/compemu.h"
34	cebix	1.1
35
36			// RAM and ROM pointers
37	gbeauche	1.14	uint32 RAMBaseMac = 0; // RAM base (Mac address space) gb-- initializer is important
38	cebix	1.1	uint8 *RAMBaseHost; // RAM base (host address space)
39			uint32 RAMSize; // Size of RAM
40			uint32 ROMBaseMac; // ROM base (Mac address space)
41			uint8 *ROMBaseHost; // ROM base (host address space)
42			uint32 ROMSize; // Size of ROM
43
44			#if !REAL_ADDRESSING
45			// Mac frame buffer
46			uint8 *MacFrameBaseHost; // Frame buffer base (host address space)
47			uint32 MacFrameSize; // Size of frame buffer
48			int MacFrameLayout; // Frame buffer layout
49			#endif
50
51	gbeauche	1.7	#if DIRECT_ADDRESSING
52			uintptr MEMBaseDiff; // Global offset between a Mac address and its Host equivalent
53			#endif
54
55	gbeauche	1.14	#if USE_JIT
56			bool UseJIT = false;
57			#endif
58
59	cebix	1.1	// From newcpu.cpp
60	gbeauche	1.15	extern bool quit_program;
61	cebix	1.1
62
63			/*
64			* Initialize 680x0 emulation, CheckROM() must have been called first
65			*/
66
67			bool Init680x0(void)
68			{
69			#if REAL_ADDRESSING
70			// Mac address space = host address space
71	gbeauche	1.19	RAMBaseMac = (uintptr)RAMBaseHost;
72			ROMBaseMac = (uintptr)ROMBaseHost;
73	gbeauche	1.7	#elif DIRECT_ADDRESSING
74	gbeauche	1.10	// Mac address space = host address space minus constant offset (MEMBaseDiff)
75	gbeauche	1.13	// NOTE: MEMBaseDiff is set up in main_unix.cpp/main()
76	gbeauche	1.10	RAMBaseMac = 0;
77			ROMBaseMac = Host2MacAddr(ROMBaseHost);
78	cebix	1.1	#else
79			// Initialize UAE memory banks
80			RAMBaseMac = 0;
81			switch (ROMVersion) {
82			case ROM_VERSION_64K:
83			case ROM_VERSION_PLUS:
84			case ROM_VERSION_CLASSIC:
85			ROMBaseMac = 0x00400000;
86			break;
87			case ROM_VERSION_II:
88			ROMBaseMac = 0x00a00000;
89			break;
90			case ROM_VERSION_32:
91			ROMBaseMac = 0x40800000;
92			break;
93			default:
94			return false;
95			}
96			memory_init();
97			#endif
98
99			init_m68k();
100	gbeauche	1.14	#if USE_JIT
101			UseJIT = compiler_use_jit();
102			if (UseJIT)
103			compiler_init();
104			#endif
105	cebix	1.1	return true;
106			}
107
108
109			/*
110			* Deinitialize 680x0 emulation
111			*/
112
113			void Exit680x0(void)
114			{
115	gbeauche	1.14	#if USE_JIT
116			if (UseJIT)
117			compiler_exit();
118			#endif
119	gbeauche	1.6	exit_m68k();
120	cebix	1.1	}
121
122
123			/*
124	cebix	1.11	* Initialize memory mapping of frame buffer (called upon video mode change)
125			*/
126
127			void InitFrameBufferMapping(void)
128			{
129			#if !REAL_ADDRESSING && !DIRECT_ADDRESSING
130			memory_init();
131			#endif
132			}
133
134			/*
135	cebix	1.1	* Reset and start 680x0 emulation (doesn't return)
136			*/
137
138			void Start680x0(void)
139			{
140			m68k_reset();
141	gbeauche	1.14	#if USE_JIT
142			if (UseJIT)
143			m68k_compile_execute();
144			else
145			#endif
146	gbeauche	1.13	m68k_execute();
147	cebix	1.1	}
148
149
150			/*
151			* Trigger interrupt
152			*/
153
154			void TriggerInterrupt(void)
155			{
156	gbeauche	1.18	idle_resume();
157	gbeauche	1.13	SPCFLAGS_SET( SPCFLAG_INT );
158	cebix	1.1	}
159
160	cebix	1.5	void TriggerNMI(void)
161			{
162			//!! not implemented yet
163			}
164
165	cebix	1.1
166			/*
167			* Get 68k interrupt level
168			*/
169
170			int intlev(void)
171			{
172			return InterruptFlags ? 1 : 0;
173			}
174
175
176			/*
177			* Execute MacOS 68k trap
178			* r->a[7] and r->sr are unused!
179			*/
180
181			void Execute68kTrap(uint16 trap, struct M68kRegisters *r)
182			{
183			int i;
184
185			// Save old PC
186			uaecptr oldpc = m68k_getpc();
187
188			// Set registers
189			for (i=0; i<8; i++)
190			m68k_dreg(regs, i) = r->d[i];
191			for (i=0; i<7; i++)
192			m68k_areg(regs, i) = r->a[i];
193
194			// Push trap and EXEC_RETURN on stack
195			m68k_areg(regs, 7) -= 2;
196			put_word(m68k_areg(regs, 7), M68K_EXEC_RETURN);
197			m68k_areg(regs, 7) -= 2;
198			put_word(m68k_areg(regs, 7), trap);
199
200			// Execute trap
201			m68k_setpc(m68k_areg(regs, 7));
202			fill_prefetch_0();
203	gbeauche	1.15	quit_program = false;
204	gbeauche	1.13	m68k_execute();
205	cebix	1.1
206			// Clean up stack
207			m68k_areg(regs, 7) += 4;
208
209			// Restore old PC
210			m68k_setpc(oldpc);
211			fill_prefetch_0();
212
213			// Get registers
214			for (i=0; i<8; i++)
215			r->d[i] = m68k_dreg(regs, i);
216			for (i=0; i<7; i++)
217			r->a[i] = m68k_areg(regs, i);
218	gbeauche	1.15	quit_program = false;
219	cebix	1.1	}
220
221
222			/*
223			* Execute 68k subroutine
224			* The executed routine must reside in UAE memory!
225			* r->a[7] and r->sr are unused!
226			*/
227
228			void Execute68k(uint32 addr, struct M68kRegisters *r)
229			{
230			int i;
231
232			// Save old PC
233			uaecptr oldpc = m68k_getpc();
234
235			// Set registers
236			for (i=0; i<8; i++)
237			m68k_dreg(regs, i) = r->d[i];
238			for (i=0; i<7; i++)
239			m68k_areg(regs, i) = r->a[i];
240
241			// Push EXEC_RETURN and faked return address (points to EXEC_RETURN) on stack
242			m68k_areg(regs, 7) -= 2;
243			put_word(m68k_areg(regs, 7), M68K_EXEC_RETURN);
244			m68k_areg(regs, 7) -= 4;
245			put_long(m68k_areg(regs, 7), m68k_areg(regs, 7) + 4);
246
247			// Execute routine
248			m68k_setpc(addr);
249			fill_prefetch_0();
250	gbeauche	1.15	quit_program = false;
251	gbeauche	1.13	m68k_execute();
252	cebix	1.1
253			// Clean up stack
254			m68k_areg(regs, 7) += 2;
255
256			// Restore old PC
257			m68k_setpc(oldpc);
258			fill_prefetch_0();
259
260			// Get registers
261			for (i=0; i<8; i++)
262			r->d[i] = m68k_dreg(regs, i);
263			for (i=0; i<7; i++)
264			r->a[i] = m68k_areg(regs, i);
265	gbeauche	1.15	quit_program = false;
266	cebix	1.1	}