src/uae_cpu/basilisk_glue.cpp

/*
 *  basilisk_glue.cpp - Glue UAE CPU to Basilisk II CPU engine interface
 *
 *  Basilisk II (C) 1997-2004 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 "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 = (uint32)RAMBaseHost;
        ROMBaseMac = (uint32)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)
{
        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:	1.16
Committed:	2004-01-12T15:29:29Z (20 years, 10 months ago) by cebix
Branch:	MAIN
CVS Tags:	nigel-build-16, nigel-build-15
Changes since 1.15:	+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	cebix	1.16	* Basilisk II (C) 1997-2004 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			#include "m68k.h"
29			#include "memory.h"
30			#include "readcpu.h"
31			#include "newcpu.h"
32	gbeauche	1.14	#include "compiler/compemu.h"
33	cebix	1.1
34
35			// RAM and ROM pointers
36	gbeauche	1.14	uint32 RAMBaseMac = 0; // RAM base (Mac address space) gb-- initializer is important
37	cebix	1.1	uint8 *RAMBaseHost; // RAM base (host address space)
38			uint32 RAMSize; // Size of RAM
39			uint32 ROMBaseMac; // ROM base (Mac address space)
40			uint8 *ROMBaseHost; // ROM base (host address space)
41			uint32 ROMSize; // Size of ROM
42
43			#if !REAL_ADDRESSING
44			// Mac frame buffer
45			uint8 *MacFrameBaseHost; // Frame buffer base (host address space)
46			uint32 MacFrameSize; // Size of frame buffer
47			int MacFrameLayout; // Frame buffer layout
48			#endif
49
50	gbeauche	1.7	#if DIRECT_ADDRESSING
51			uintptr MEMBaseDiff; // Global offset between a Mac address and its Host equivalent
52			#endif
53
54	gbeauche	1.14	#if USE_JIT
55			bool UseJIT = false;
56			#endif
57
58	cebix	1.1	// From newcpu.cpp
59	gbeauche	1.15	extern bool quit_program;
60	cebix	1.1
61
62			/*
63			* Initialize 680x0 emulation, CheckROM() must have been called first
64			*/
65
66			bool Init680x0(void)
67			{
68			#if REAL_ADDRESSING
69			// Mac address space = host address space
70			RAMBaseMac = (uint32)RAMBaseHost;
71			ROMBaseMac = (uint32)ROMBaseHost;
72	gbeauche	1.7	#elif DIRECT_ADDRESSING
73	gbeauche	1.10	// Mac address space = host address space minus constant offset (MEMBaseDiff)
74	gbeauche	1.13	// NOTE: MEMBaseDiff is set up in main_unix.cpp/main()
75	gbeauche	1.10	RAMBaseMac = 0;
76			ROMBaseMac = Host2MacAddr(ROMBaseHost);
77	cebix	1.1	#else
78			// Initialize UAE memory banks
79			RAMBaseMac = 0;
80			switch (ROMVersion) {
81			case ROM_VERSION_64K:
82			case ROM_VERSION_PLUS:
83			case ROM_VERSION_CLASSIC:
84			ROMBaseMac = 0x00400000;
85			break;
86			case ROM_VERSION_II:
87			ROMBaseMac = 0x00a00000;
88			break;
89			case ROM_VERSION_32:
90			ROMBaseMac = 0x40800000;
91			break;
92			default:
93			return false;
94			}
95			memory_init();
96			#endif
97
98			init_m68k();
99	gbeauche	1.14	#if USE_JIT
100			UseJIT = compiler_use_jit();
101			if (UseJIT)
102			compiler_init();
103			#endif
104	cebix	1.1	return true;
105			}
106
107
108			/*
109			* Deinitialize 680x0 emulation
110			*/
111
112			void Exit680x0(void)
113			{
114	gbeauche	1.14	#if USE_JIT
115			if (UseJIT)
116			compiler_exit();
117			#endif
118	gbeauche	1.6	exit_m68k();
119	cebix	1.1	}
120
121
122			/*
123	cebix	1.11	* Initialize memory mapping of frame buffer (called upon video mode change)
124			*/
125
126			void InitFrameBufferMapping(void)
127			{
128			#if !REAL_ADDRESSING && !DIRECT_ADDRESSING
129			memory_init();
130			#endif
131			}
132
133			/*
134	cebix	1.1	* Reset and start 680x0 emulation (doesn't return)
135			*/
136
137			void Start680x0(void)
138			{
139			m68k_reset();
140	gbeauche	1.14	#if USE_JIT
141			if (UseJIT)
142			m68k_compile_execute();
143			else
144			#endif
145	gbeauche	1.13	m68k_execute();
146	cebix	1.1	}
147
148
149			/*
150			* Trigger interrupt
151			*/
152
153			void TriggerInterrupt(void)
154			{
155	gbeauche	1.13	SPCFLAGS_SET( SPCFLAG_INT );
156	cebix	1.1	}
157
158	cebix	1.5	void TriggerNMI(void)
159			{
160			//!! not implemented yet
161			}
162
163	cebix	1.1
164			/*
165			* Get 68k interrupt level
166			*/
167
168			int intlev(void)
169			{
170			return InterruptFlags ? 1 : 0;
171			}
172
173
174			/*
175			* Execute MacOS 68k trap
176			* r->a[7] and r->sr are unused!
177			*/
178
179			void Execute68kTrap(uint16 trap, struct M68kRegisters *r)
180			{
181			int i;
182
183			// Save old PC
184			uaecptr oldpc = m68k_getpc();
185
186			// Set registers
187			for (i=0; i<8; i++)
188			m68k_dreg(regs, i) = r->d[i];
189			for (i=0; i<7; i++)
190			m68k_areg(regs, i) = r->a[i];
191
192			// Push trap and EXEC_RETURN on stack
193			m68k_areg(regs, 7) -= 2;
194			put_word(m68k_areg(regs, 7), M68K_EXEC_RETURN);
195			m68k_areg(regs, 7) -= 2;
196			put_word(m68k_areg(regs, 7), trap);
197
198			// Execute trap
199			m68k_setpc(m68k_areg(regs, 7));
200			fill_prefetch_0();
201	gbeauche	1.15	quit_program = false;
202	gbeauche	1.13	m68k_execute();
203	cebix	1.1
204			// Clean up stack
205			m68k_areg(regs, 7) += 4;
206
207			// Restore old PC
208			m68k_setpc(oldpc);
209			fill_prefetch_0();
210
211			// Get registers
212			for (i=0; i<8; i++)
213			r->d[i] = m68k_dreg(regs, i);
214			for (i=0; i<7; i++)
215			r->a[i] = m68k_areg(regs, i);
216	gbeauche	1.15	quit_program = false;
217	cebix	1.1	}
218
219
220			/*
221			* Execute 68k subroutine
222			* The executed routine must reside in UAE memory!
223			* r->a[7] and r->sr are unused!
224			*/
225
226			void Execute68k(uint32 addr, struct M68kRegisters *r)
227			{
228			int i;
229
230			// Save old PC
231			uaecptr oldpc = m68k_getpc();
232
233			// Set registers
234			for (i=0; i<8; i++)
235			m68k_dreg(regs, i) = r->d[i];
236			for (i=0; i<7; i++)
237			m68k_areg(regs, i) = r->a[i];
238
239			// Push EXEC_RETURN and faked return address (points to EXEC_RETURN) on stack
240			m68k_areg(regs, 7) -= 2;
241			put_word(m68k_areg(regs, 7), M68K_EXEC_RETURN);
242			m68k_areg(regs, 7) -= 4;
243			put_long(m68k_areg(regs, 7), m68k_areg(regs, 7) + 4);
244
245			// Execute routine
246			m68k_setpc(addr);
247			fill_prefetch_0();
248	gbeauche	1.15	quit_program = false;
249	gbeauche	1.13	m68k_execute();
250	cebix	1.1
251			// Clean up stack
252			m68k_areg(regs, 7) += 2;
253
254			// Restore old PC
255			m68k_setpc(oldpc);
256			fill_prefetch_0();
257
258			// Get registers
259			for (i=0; i<8; i++)
260			r->d[i] = m68k_dreg(regs, i);
261			for (i=0; i<7; i++)
262			r->a[i] = m68k_areg(regs, i);
263	gbeauche	1.15	quit_program = false;
264	cebix	1.1	}