src/cpus/cpu_m68k.c

/*
 *  Copyright (C) 2005  Anders Gavare.  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright  
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE   
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 *  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE.
 *
 *
 *  $Id: cpu_m68k.c,v 1.4 2005/10/22 17:24:20 debug Exp $
 *
 *  Motorola 68K CPU emulation.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "cpu.h"
#include "machine.h"
#include "memory.h"
#include "misc.h"
#include "symbol.h"


#define DYNTRANS_32
#define DYNTRANS_VARIABLE_INSTRUCTION_LENGTH
#include "tmp_m68k_head.c"


static char *m68k_aname[] = { "a0", "a1", "a2", "a3", "a4", "a5", "fp", "a7" };


/*
 *  m68k_cpu_new():
 *
 *  Create a new M68K cpu object.
 *
 *  Returns 1 on success, 0 if there was no matching M68K processor with
 *  this cpu_type_name.
 */
int m68k_cpu_new(struct cpu *cpu, struct memory *mem, struct machine *machine,
        int cpu_id, char *cpu_type_name)
{
        if (strcasecmp(cpu_type_name, "68020") != 0)
                return 0;

        cpu->memory_rw = m68k_memory_rw;
        cpu->update_translation_table = m68k_update_translation_table;
        cpu->invalidate_translation_caches =
            m68k_invalidate_translation_caches;
        cpu->invalidate_code_translation = m68k_invalidate_code_translation;
        cpu->is_32bit = 1;

        cpu->byte_order = EMUL_BIG_ENDIAN;

        /*  Only show name and caches etc for CPU nr 0 (in SMP machines):  */
        if (cpu_id == 0) {
                debug("%s", cpu->name);
        }

        return 1;
}


/*
 *  m68k_cpu_list_available_types():
 *
 *  Print a list of available M68K CPU types.
 */
void m68k_cpu_list_available_types(void)
{
        debug("68020\n");
        /*  TODO  */
}


/*
 *  m68k_cpu_dumpinfo():
 */
void m68k_cpu_dumpinfo(struct cpu *cpu)
{
        /*  TODO  */
        debug("\n");
}


/*
 *  m68k_cpu_register_dump():
 *
 *  Dump cpu registers in a relatively readable format.
 *
 *  gprs: set to non-zero to dump GPRs and some special-purpose registers.
 *  coprocs: set bit 0..3 to dump registers in coproc 0..3.
 */
void m68k_cpu_register_dump(struct cpu *cpu, int gprs, int coprocs)
{
        char *symbol;
        uint64_t offset;
        int x = cpu->cpu_id;

        if (gprs) {
                /*  Special registers (pc, ...) first:  */
                symbol = get_symbol_name(&cpu->machine->symbol_context,
                    cpu->pc, &offset);

                debug("cpu%i: pc  = 0x%08x", x, (int)cpu->pc);
                debug("  <%s>\n", symbol != NULL? symbol : " no symbol ");
        }
}


/*
 *  m68k_cpu_register_match():
 */
void m68k_cpu_register_match(struct machine *m, char *name,
        int writeflag, uint64_t *valuep, int *match_register)
{
        int cpunr = 0;

        /*  CPU number:  */

        /*  TODO  */

        /*  Register name:  */
        if (strcasecmp(name, "pc") == 0) {
                if (writeflag) {
                        m->cpus[cpunr]->pc = *valuep;
                } else
                        *valuep = m->cpus[cpunr]->pc;
                *match_register = 1;
        }
}


/*
 *  m68k_cpu_show_full_statistics():
 *
 *  Show detailed statistics on opcode usage on each cpu.
 */
void m68k_cpu_show_full_statistics(struct machine *m)
{
        fatal("m68k_cpu_show_full_statistics(): TODO\n");
}


/*
 *  m68k_cpu_tlbdump():
 *
 *  Called from the debugger to dump the TLB in a readable format.
 *  x is the cpu number to dump, or -1 to dump all CPUs.
 *
 *  If rawflag is nonzero, then the TLB contents isn't formated nicely,
 *  just dumped.
 */
void m68k_cpu_tlbdump(struct machine *m, int x, int rawflag)
{
        fatal("m68k_cpu_tlbdump(): TODO\n");
}


/*
 *  m68k_cpu_interrupt():
 */
int m68k_cpu_interrupt(struct cpu *cpu, uint64_t irq_nr)
{
        fatal("m68k_cpu_interrupt(): TODO\n");
        return 0;
}


/*
 *  m68k_cpu_interrupt_ack():
 */
int m68k_cpu_interrupt_ack(struct cpu *cpu, uint64_t irq_nr)
{
        /*  fatal("m68k_cpu_interrupt_ack(): TODO\n");  */
        return 0;
}


/*  Helper functions:  */
static void print_two(unsigned char *instr, int *len)
{ debug(" %02x%02x", instr[*len], instr[*len+1]); (*len) += 2; }
static void print_spaces(int len) { int i; debug(" "); for (i=0; i<16-len/2*5;
    i++) debug(" "); }


/*
 *  m68k_cpu_disassemble_instr():
 *
 *  Convert an instruction word into human readable format, for instruction
 *  tracing.
 *
 *  If running is 1, cpu->pc should be the address of the instruction.
 *
 *  If running is 0, things that depend on the runtime environment (eg.
 *  register contents) will not be shown, and addr will be used instead of
 *  cpu->pc for relative addresses.
 */
int m68k_cpu_disassemble_instr(struct cpu *cpu, unsigned char *ib,
        int running, uint64_t dumpaddr, int bintrans)
{
        uint64_t offset;
        int len = 0;
        char *symbol;

        if (running)
                dumpaddr = cpu->pc;

        symbol = get_symbol_name(&cpu->machine->symbol_context,
            dumpaddr, &offset);
        if (symbol != NULL && offset==0)
                debug("<%s>\n", symbol);

        if (cpu->machine->ncpus > 1 && running)
                debug("cpu%i: ", cpu->cpu_id);

        debug("0x%08x: ", (int)dumpaddr);

        print_two(ib, &len);

        if (ib[0] == 0x48) {
                if (ib[1] >= 0x40 && ib[1] <= 0x47) {
                        print_spaces(len);
                        debug("swap\td%i\n", ib[1] & 7);
                } else if (ib[1] >= 0x48 && ib[1] <= 0x4f) {
                        print_spaces(len);
                        debug("bkpt\t#%i\n", ib[1] & 7);
                } else {
                        print_spaces(len);
                        debug("UNIMPLEMENTED 0x%02x%02x\n", ib[0], ib[1]);
                }
        } else if (ib[0] == 0x4a) {
                if (ib[1] == 0xfc) {
                        print_spaces(len);
                        debug("illegal\n");
                } else {
                        print_spaces(len);
                        debug("UNIMPLEMENTED 0x%02x%02x\n", ib[0], ib[1]);
                }
        } else if (ib[0] == 0x4e) {
                if (ib[1] >= 0x40 && ib[1] <= 0x4f) {
                        print_spaces(len);
                        debug("trap\t#%i\n", ib[1] & 15);
                } else if (ib[1] >= 0x50 && ib[1] <= 0x57) {
                        print_two(ib, &len);
                        print_spaces(len);
                        debug("linkw\t%%%s,#%i\n", m68k_aname[ib[1] & 7],
                            ((ib[2] << 8) + ib[3]));
                } else if (ib[1] >= 0x58 && ib[1] <= 0x5f) {
                        print_spaces(len);
                        debug("unlk\t%%%s\n", m68k_aname[ib[1] & 7]);
                } else if (ib[1] == 0x70) {
                        print_spaces(len);
                        debug("reset\n");
                } else if (ib[1] == 0x71) {
                        print_spaces(len);
                        debug("nop\n");
                } else if (ib[1] == 0x72) {
                        print_two(ib, &len);
                        print_spaces(len);
                        debug("stop\t#0x%04x\n", ((ib[2] << 8) + ib[3]));
                } else if (ib[1] == 0x73) {
                        print_spaces(len);
                        debug("rte\n");
                } else if (ib[1] == 0x74) {
                        print_two(ib, &len);
                        print_spaces(len);
                        debug("rtd\t#0x%04x\n", ((ib[2] << 8) + ib[3]));
                } else if (ib[1] == 0x75) {
                        print_spaces(len);
                        debug("rts\n");
                } else {
                        print_spaces(len);
                        debug("UNIMPLEMENTED 0x%02x%02x\n", ib[0], ib[1]);
                }
        } else {
                print_spaces(len);
                debug("UNIMPLEMENTED 0x%02x%02x\n", ib[0], ib[1]);
        }

        return len;
}


#include "tmp_m68k_tail.c"

1	dpavlin	14	/*
2			* Copyright (C) 2005 Anders Gavare. All rights reserved.
3			*
4			* Redistribution and use in source and binary forms, with or without
5			* modification, are permitted provided that the following conditions are met:
6			*
7			* 1. Redistributions of source code must retain the above copyright
8			* notice, this list of conditions and the following disclaimer.
9			* 2. Redistributions in binary form must reproduce the above copyright
10			* notice, this list of conditions and the following disclaimer in the
11			* documentation and/or other materials provided with the distribution.
12			* 3. The name of the author may not be used to endorse or promote products
13			* derived from this software without specific prior written permission.
14			*
15			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25			* SUCH DAMAGE.
26			*
27			*
28	dpavlin	18	* $Id: cpu_m68k.c,v 1.4 2005/10/22 17:24:20 debug Exp $
29	dpavlin	14	*
30			* Motorola 68K CPU emulation.
31			*/
32
33			#include <stdio.h>
34			#include <stdlib.h>
35			#include <string.h>
36			#include <ctype.h>
37
38			#include "cpu.h"
39			#include "machine.h"
40			#include "memory.h"
41			#include "misc.h"
42			#include "symbol.h"
43
44
45			#define DYNTRANS_32
46			#define DYNTRANS_VARIABLE_INSTRUCTION_LENGTH
47			#include "tmp_m68k_head.c"
48
49
50			static char *m68k_aname[] = { "a0", "a1", "a2", "a3", "a4", "a5", "fp", "a7" };
51
52
53			/*
54			* m68k_cpu_new():
55			*
56			* Create a new M68K cpu object.
57			*
58			* Returns 1 on success, 0 if there was no matching M68K processor with
59			* this cpu_type_name.
60			*/
61			int m68k_cpu_new(struct cpu cpu, struct memory mem, struct machine *machine,
62			int cpu_id, char *cpu_type_name)
63			{
64			if (strcasecmp(cpu_type_name, "68020") != 0)
65			return 0;
66
67			cpu->memory_rw = m68k_memory_rw;
68			cpu->update_translation_table = m68k_update_translation_table;
69	dpavlin	18	cpu->invalidate_translation_caches =
70			m68k_invalidate_translation_caches;
71	dpavlin	14	cpu->invalidate_code_translation = m68k_invalidate_code_translation;
72			cpu->is_32bit = 1;
73
74			cpu->byte_order = EMUL_BIG_ENDIAN;
75
76			/* Only show name and caches etc for CPU nr 0 (in SMP machines): */
77			if (cpu_id == 0) {
78			debug("%s", cpu->name);
79			}
80
81			return 1;
82			}
83
84
85			/*
86			* m68k_cpu_list_available_types():
87			*
88			* Print a list of available M68K CPU types.
89			*/
90			void m68k_cpu_list_available_types(void)
91			{
92			debug("68020\n");
93			/* TODO */
94			}
95
96
97			/*
98			* m68k_cpu_dumpinfo():
99			*/
100			void m68k_cpu_dumpinfo(struct cpu *cpu)
101			{
102			/* TODO */
103			debug("\n");
104			}
105
106
107			/*
108			* m68k_cpu_register_dump():
109			*
110			* Dump cpu registers in a relatively readable format.
111			*
112			* gprs: set to non-zero to dump GPRs and some special-purpose registers.
113			* coprocs: set bit 0..3 to dump registers in coproc 0..3.
114			*/
115			void m68k_cpu_register_dump(struct cpu *cpu, int gprs, int coprocs)
116			{
117			char *symbol;
118			uint64_t offset;
119			int x = cpu->cpu_id;
120
121			if (gprs) {
122			/* Special registers (pc, ...) first: */
123			symbol = get_symbol_name(&cpu->machine->symbol_context,
124			cpu->pc, &offset);
125
126			debug("cpu%i: pc = 0x%08x", x, (int)cpu->pc);
127			debug(" <%s>\n", symbol != NULL? symbol : " no symbol ");
128			}
129			}
130
131
132			/*
133			* m68k_cpu_register_match():
134			*/
135			void m68k_cpu_register_match(struct machine m, char name,
136			int writeflag, uint64_t valuep, int match_register)
137			{
138			int cpunr = 0;
139
140			/* CPU number: */
141
142			/* TODO */
143
144			/* Register name: */
145			if (strcasecmp(name, "pc") == 0) {
146			if (writeflag) {
147			m->cpus[cpunr]->pc = *valuep;
148			} else
149			*valuep = m->cpus[cpunr]->pc;
150			*match_register = 1;
151			}
152			}
153
154
155			/*
156			* m68k_cpu_show_full_statistics():
157			*
158			* Show detailed statistics on opcode usage on each cpu.
159			*/
160			void m68k_cpu_show_full_statistics(struct machine *m)
161			{
162			fatal("m68k_cpu_show_full_statistics(): TODO\n");
163			}
164
165
166			/*
167			* m68k_cpu_tlbdump():
168			*
169			* Called from the debugger to dump the TLB in a readable format.
170			* x is the cpu number to dump, or -1 to dump all CPUs.
171			*
172			* If rawflag is nonzero, then the TLB contents isn't formated nicely,
173			* just dumped.
174			*/
175			void m68k_cpu_tlbdump(struct machine *m, int x, int rawflag)
176			{
177			fatal("m68k_cpu_tlbdump(): TODO\n");
178			}
179
180
181			/*
182			* m68k_cpu_interrupt():
183			*/
184			int m68k_cpu_interrupt(struct cpu *cpu, uint64_t irq_nr)
185			{
186			fatal("m68k_cpu_interrupt(): TODO\n");
187			return 0;
188			}
189
190
191			/*
192			* m68k_cpu_interrupt_ack():
193			*/
194			int m68k_cpu_interrupt_ack(struct cpu *cpu, uint64_t irq_nr)
195			{
196			/* fatal("m68k_cpu_interrupt_ack(): TODO\n"); */
197			return 0;
198			}
199
200
201			/* Helper functions: */
202			static void print_two(unsigned char instr, int len)
203			{ debug(" %02x%02x", instr[len], instr[len+1]); (*len) += 2; }
204			static void print_spaces(int len) { int i; debug(" "); for (i=0; i<16-len/2*5;
205			i++) debug(" "); }
206
207
208			/*
209			* m68k_cpu_disassemble_instr():
210			*
211			* Convert an instruction word into human readable format, for instruction
212			* tracing.
213			*
214			* If running is 1, cpu->pc should be the address of the instruction.
215			*
216			* If running is 0, things that depend on the runtime environment (eg.
217			* register contents) will not be shown, and addr will be used instead of
218			* cpu->pc for relative addresses.
219			*/
220			int m68k_cpu_disassemble_instr(struct cpu cpu, unsigned char ib,
221			int running, uint64_t dumpaddr, int bintrans)
222			{
223			uint64_t offset;
224			int len = 0;
225			char *symbol;
226
227			if (running)
228			dumpaddr = cpu->pc;
229
230			symbol = get_symbol_name(&cpu->machine->symbol_context,
231			dumpaddr, &offset);
232			if (symbol != NULL && offset==0)
233			debug("<%s>\n", symbol);
234
235			if (cpu->machine->ncpus > 1 && running)
236			debug("cpu%i: ", cpu->cpu_id);
237
238			debug("0x%08x: ", (int)dumpaddr);
239
240			print_two(ib, &len);
241
242			if (ib[0] == 0x48) {
243			if (ib[1] >= 0x40 && ib[1] <= 0x47) {
244			print_spaces(len);
245			debug("swap\td%i\n", ib[1] & 7);
246			} else if (ib[1] >= 0x48 && ib[1] <= 0x4f) {
247			print_spaces(len);
248			debug("bkpt\t#%i\n", ib[1] & 7);
249			} else {
250			print_spaces(len);
251			debug("UNIMPLEMENTED 0x%02x%02x\n", ib[0], ib[1]);
252			}
253			} else if (ib[0] == 0x4a) {
254			if (ib[1] == 0xfc) {
255			print_spaces(len);
256			debug("illegal\n");
257			} else {
258			print_spaces(len);
259			debug("UNIMPLEMENTED 0x%02x%02x\n", ib[0], ib[1]);
260			}
261			} else if (ib[0] == 0x4e) {
262			if (ib[1] >= 0x40 && ib[1] <= 0x4f) {
263			print_spaces(len);
264			debug("trap\t#%i\n", ib[1] & 15);
265			} else if (ib[1] >= 0x50 && ib[1] <= 0x57) {
266			print_two(ib, &len);
267			print_spaces(len);
268			debug("linkw\t%%%s,#%i\n", m68k_aname[ib[1] & 7],
269			((ib[2] << 8) + ib[3]));
270			} else if (ib[1] >= 0x58 && ib[1] <= 0x5f) {
271			print_spaces(len);
272			debug("unlk\t%%%s\n", m68k_aname[ib[1] & 7]);
273			} else if (ib[1] == 0x70) {
274			print_spaces(len);
275			debug("reset\n");
276			} else if (ib[1] == 0x71) {
277			print_spaces(len);
278			debug("nop\n");
279			} else if (ib[1] == 0x72) {
280			print_two(ib, &len);
281			print_spaces(len);
282			debug("stop\t#0x%04x\n", ((ib[2] << 8) + ib[3]));
283			} else if (ib[1] == 0x73) {
284			print_spaces(len);
285			debug("rte\n");
286			} else if (ib[1] == 0x74) {
287			print_two(ib, &len);
288			print_spaces(len);
289			debug("rtd\t#0x%04x\n", ((ib[2] << 8) + ib[3]));
290			} else if (ib[1] == 0x75) {
291			print_spaces(len);
292			debug("rts\n");
293			} else {
294			print_spaces(len);
295			debug("UNIMPLEMENTED 0x%02x%02x\n", ib[0], ib[1]);
296			}
297			} else {
298			print_spaces(len);
299			debug("UNIMPLEMENTED 0x%02x%02x\n", ib[0], ib[1]);
300			}
301
302			return len;
303			}
304
305
306			#include "tmp_m68k_tail.c"
307