| 1 |
/* |
| 2 |
* Copyright (C) 2005-2007 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 |
* $Id: cpu_m68k.c,v 1.16 2006/12/30 13:30:54 debug Exp $ |
| 29 |
* |
| 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 "settings.h" |
| 43 |
#include "symbol.h" |
| 44 |
|
| 45 |
|
| 46 |
#define DYNTRANS_32 |
| 47 |
#define DYNTRANS_VARIABLE_INSTRUCTION_LENGTH |
| 48 |
#include "tmp_m68k_head.c" |
| 49 |
|
| 50 |
|
| 51 |
static char *m68k_aname[] = { "a0", "a1", "a2", "a3", "a4", "a5", "fp", "a7" }; |
| 52 |
static char *m68k_dname[] = { "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7" }; |
| 53 |
|
| 54 |
|
| 55 |
/* |
| 56 |
* m68k_cpu_new(): |
| 57 |
* |
| 58 |
* Create a new M68K cpu object. |
| 59 |
* |
| 60 |
* Returns 1 on success, 0 if there was no matching M68K processor with |
| 61 |
* this cpu_type_name. |
| 62 |
*/ |
| 63 |
int m68k_cpu_new(struct cpu *cpu, struct memory *mem, struct machine *machine, |
| 64 |
int cpu_id, char *cpu_type_name) |
| 65 |
{ |
| 66 |
int i = 0; |
| 67 |
struct m68k_cpu_type_def cpu_type_defs[] = M68K_CPU_TYPE_DEFS; |
| 68 |
|
| 69 |
/* Scan the cpu_type_defs list for this cpu type: */ |
| 70 |
while (cpu_type_defs[i].name != NULL) { |
| 71 |
if (strcasecmp(cpu_type_defs[i].name, cpu_type_name) == 0) { |
| 72 |
break; |
| 73 |
} |
| 74 |
i++; |
| 75 |
} |
| 76 |
if (cpu_type_defs[i].name == NULL) |
| 77 |
return 0; |
| 78 |
|
| 79 |
cpu->run_instr = m68k_run_instr; |
| 80 |
cpu->memory_rw = m68k_memory_rw; |
| 81 |
cpu->update_translation_table = m68k_update_translation_table; |
| 82 |
cpu->invalidate_translation_caches = |
| 83 |
m68k_invalidate_translation_caches; |
| 84 |
cpu->invalidate_code_translation = m68k_invalidate_code_translation; |
| 85 |
cpu->is_32bit = 1; |
| 86 |
cpu->byte_order = EMUL_BIG_ENDIAN; |
| 87 |
|
| 88 |
cpu->cd.m68k.cpu_type = cpu_type_defs[i]; |
| 89 |
|
| 90 |
/* Only show name and caches etc for CPU nr 0 (in SMP machines): */ |
| 91 |
if (cpu_id == 0) { |
| 92 |
debug("%s", cpu->name); |
| 93 |
} |
| 94 |
|
| 95 |
/* Add all register names to the settings: */ |
| 96 |
CPU_SETTINGS_ADD_REGISTER64("pc", cpu->pc); |
| 97 |
for (i=0; i<N_M68K_AREGS; i++) |
| 98 |
CPU_SETTINGS_ADD_REGISTER32(m68k_aname[i], cpu->cd.m68k.a[i]); |
| 99 |
/* Both "fp" and "a6" should map to the same register: */ |
| 100 |
CPU_SETTINGS_ADD_REGISTER32("a6", cpu->cd.m68k.a[6]); |
| 101 |
for (i=0; i<N_M68K_DREGS; i++) |
| 102 |
CPU_SETTINGS_ADD_REGISTER32(m68k_dname[i], cpu->cd.m68k.d[i]); |
| 103 |
|
| 104 |
return 1; |
| 105 |
} |
| 106 |
|
| 107 |
|
| 108 |
/* |
| 109 |
* m68k_cpu_list_available_types(): |
| 110 |
* |
| 111 |
* Print a list of available M68K CPU types. |
| 112 |
*/ |
| 113 |
void m68k_cpu_list_available_types(void) |
| 114 |
{ |
| 115 |
int i = 0, j; |
| 116 |
struct m68k_cpu_type_def tdefs[] = M68K_CPU_TYPE_DEFS; |
| 117 |
|
| 118 |
while (tdefs[i].name != NULL) { |
| 119 |
debug("%s", tdefs[i].name); |
| 120 |
for (j=10 - strlen(tdefs[i].name); j>0; j--) |
| 121 |
debug(" "); |
| 122 |
i++; |
| 123 |
if ((i % 6) == 0 || tdefs[i].name == NULL) |
| 124 |
debug("\n"); |
| 125 |
} |
| 126 |
} |
| 127 |
|
| 128 |
|
| 129 |
/* |
| 130 |
* m68k_cpu_dumpinfo(): |
| 131 |
*/ |
| 132 |
void m68k_cpu_dumpinfo(struct cpu *cpu) |
| 133 |
{ |
| 134 |
/* TODO */ |
| 135 |
debug("\n"); |
| 136 |
} |
| 137 |
|
| 138 |
|
| 139 |
/* |
| 140 |
* m68k_cpu_register_dump(): |
| 141 |
* |
| 142 |
* Dump cpu registers in a relatively readable format. |
| 143 |
* |
| 144 |
* gprs: set to non-zero to dump GPRs and some special-purpose registers. |
| 145 |
* coprocs: set bit 0..3 to dump registers in coproc 0..3. |
| 146 |
*/ |
| 147 |
void m68k_cpu_register_dump(struct cpu *cpu, int gprs, int coprocs) |
| 148 |
{ |
| 149 |
char *symbol; |
| 150 |
uint64_t offset; |
| 151 |
int x = cpu->cpu_id, i; |
| 152 |
|
| 153 |
if (gprs) { |
| 154 |
/* Special registers (pc, ...) first: */ |
| 155 |
symbol = get_symbol_name(&cpu->machine->symbol_context, |
| 156 |
cpu->pc, &offset); |
| 157 |
|
| 158 |
debug("cpu%i: pc = 0x%08"PRIx32, x, (uint32_t)cpu->pc); |
| 159 |
debug(" <%s>\n", symbol != NULL? symbol : " no symbol "); |
| 160 |
|
| 161 |
for (i=0; i<N_M68K_AREGS; i++) { |
| 162 |
if ((i % 4) == 0) |
| 163 |
debug("cpu%i:", x); |
| 164 |
debug(" %s = 0x%08"PRIx32" ", |
| 165 |
m68k_aname[i], cpu->cd.m68k.a[i]); |
| 166 |
if ((i % 4) == 3) |
| 167 |
debug("\n"); |
| 168 |
} |
| 169 |
|
| 170 |
for (i=0; i<N_M68K_DREGS; i++) { |
| 171 |
if ((i % 4) == 0) |
| 172 |
debug("cpu%i:", x); |
| 173 |
debug(" %s = 0x%08"PRIx32" ", |
| 174 |
m68k_dname[i], cpu->cd.m68k.d[i]); |
| 175 |
if ((i % 4) == 3) |
| 176 |
debug("\n"); |
| 177 |
} |
| 178 |
} |
| 179 |
} |
| 180 |
|
| 181 |
|
| 182 |
/* |
| 183 |
* m68k_cpu_tlbdump(): |
| 184 |
* |
| 185 |
* Called from the debugger to dump the TLB in a readable format. |
| 186 |
* x is the cpu number to dump, or -1 to dump all CPUs. |
| 187 |
* |
| 188 |
* If rawflag is nonzero, then the TLB contents isn't formated nicely, |
| 189 |
* just dumped. |
| 190 |
*/ |
| 191 |
void m68k_cpu_tlbdump(struct machine *m, int x, int rawflag) |
| 192 |
{ |
| 193 |
} |
| 194 |
|
| 195 |
|
| 196 |
/* |
| 197 |
* m68k_cpu_gdb_stub(): |
| 198 |
* |
| 199 |
* Execute a "remote GDB" command. Returns a newly allocated response string |
| 200 |
* on success, NULL on failure. |
| 201 |
*/ |
| 202 |
char *m68k_cpu_gdb_stub(struct cpu *cpu, char *cmd) |
| 203 |
{ |
| 204 |
fatal("m68k_cpu_gdb_stub(): TODO\n"); |
| 205 |
return NULL; |
| 206 |
} |
| 207 |
|
| 208 |
|
| 209 |
/* |
| 210 |
* m68k_cpu_interrupt(): |
| 211 |
*/ |
| 212 |
int m68k_cpu_interrupt(struct cpu *cpu, uint64_t irq_nr) |
| 213 |
{ |
| 214 |
fatal("m68k_cpu_interrupt(): TODO\n"); |
| 215 |
return 0; |
| 216 |
} |
| 217 |
|
| 218 |
|
| 219 |
/* |
| 220 |
* m68k_cpu_interrupt_ack(): |
| 221 |
*/ |
| 222 |
int m68k_cpu_interrupt_ack(struct cpu *cpu, uint64_t irq_nr) |
| 223 |
{ |
| 224 |
/* fatal("m68k_cpu_interrupt_ack(): TODO\n"); */ |
| 225 |
return 0; |
| 226 |
} |
| 227 |
|
| 228 |
|
| 229 |
/* Helper functions: */ |
| 230 |
static void print_two(unsigned char *instr, int *len) |
| 231 |
{ debug(" %02x%02x", instr[*len], instr[*len+1]); (*len) += 2; } |
| 232 |
static void print_spaces(int len) { int i; debug(" "); for (i=0; i<16-len/2*5; |
| 233 |
i++) debug(" "); } |
| 234 |
|
| 235 |
|
| 236 |
/* |
| 237 |
* m68k_cpu_disassemble_instr(): |
| 238 |
* |
| 239 |
* Convert an instruction word into human readable format, for instruction |
| 240 |
* tracing. |
| 241 |
* |
| 242 |
* If running is 1, cpu->pc should be the address of the instruction. |
| 243 |
* |
| 244 |
* If running is 0, things that depend on the runtime environment (eg. |
| 245 |
* register contents) will not be shown, and addr will be used instead of |
| 246 |
* cpu->pc for relative addresses. |
| 247 |
*/ |
| 248 |
int m68k_cpu_disassemble_instr(struct cpu *cpu, unsigned char *ib, |
| 249 |
int running, uint64_t dumpaddr) |
| 250 |
{ |
| 251 |
uint64_t offset; |
| 252 |
int len = 0; |
| 253 |
char *symbol; |
| 254 |
|
| 255 |
if (running) |
| 256 |
dumpaddr = cpu->pc; |
| 257 |
|
| 258 |
symbol = get_symbol_name(&cpu->machine->symbol_context, |
| 259 |
dumpaddr, &offset); |
| 260 |
if (symbol != NULL && offset==0) |
| 261 |
debug("<%s>\n", symbol); |
| 262 |
|
| 263 |
if (cpu->machine->ncpus > 1 && running) |
| 264 |
debug("cpu%i: ", cpu->cpu_id); |
| 265 |
|
| 266 |
debug("0x%08x: ", (int)dumpaddr); |
| 267 |
|
| 268 |
print_two(ib, &len); |
| 269 |
|
| 270 |
switch (ib[0] >> 4) { |
| 271 |
|
| 272 |
case 0x4: |
| 273 |
switch (ib[0] & 0xf) { |
| 274 |
|
| 275 |
case 0xe: |
| 276 |
if (ib[1] >= 0x50 && ib[1] <= 0x57) { |
| 277 |
print_two(ib, &len); |
| 278 |
print_spaces(len); |
| 279 |
debug("linkw\t%%%s,#%i\n", |
| 280 |
m68k_aname[ib[1] & 7], |
| 281 |
((ib[2] << 8) + ib[3])); |
| 282 |
} else if (ib[1] >= 0x58 && ib[1] <= 0x5f) { |
| 283 |
print_spaces(len); |
| 284 |
debug("unlk\t%%%s\n", m68k_aname[ib[1] & 7]); |
| 285 |
} else if (ib[1] == 0x71) { |
| 286 |
print_spaces(len); |
| 287 |
debug("nop\n"); |
| 288 |
} else if (ib[1] == 0x73) { |
| 289 |
print_spaces(len); |
| 290 |
debug("rte\n"); |
| 291 |
} else if (ib[1] == 0x74) { |
| 292 |
print_two(ib, &len); |
| 293 |
print_spaces(len); |
| 294 |
debug("rtd\t#0x%04x\n", ((ib[2] << 8) + ib[3])); |
| 295 |
} else if (ib[1] == 0x75) { |
| 296 |
print_spaces(len); |
| 297 |
debug("rts\n"); |
| 298 |
} else { |
| 299 |
print_spaces(len); |
| 300 |
debug("UNIMPLEMENTED\n"); |
| 301 |
} |
| 302 |
break; |
| 303 |
|
| 304 |
default:print_spaces(len); |
| 305 |
debug("UNIMPLEMENTED\n"); |
| 306 |
} |
| 307 |
break; |
| 308 |
|
| 309 |
default:print_spaces(len); |
| 310 |
debug("UNIMPLEMENTED\n"); |
| 311 |
} |
| 312 |
|
| 313 |
return len; |
| 314 |
} |
| 315 |
|
| 316 |
|
| 317 |
#include "tmp_m68k_tail.c" |
| 318 |
|
Parent Directory
| 
Revision Log