/[gxemul]/trunk/src/cpus/cpu_m68k.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
ViewVC logotype

Contents of /trunk/src/cpus/cpu_m68k.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 14 - (show annotations)
Mon Oct 8 16:18:51 2007 UTC (13 years, 3 months ago) by dpavlin
File MIME type: text/plain
File size: 7769 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.982 2005/10/07 22:45:32 debug Exp $
20050816	Some success in decoding the way the SGI O2 PROM draws graphics
		during bootup; lines/rectangles and bitmaps work, enough to
		show the bootlogo etc. :-)
		Adding more PPC instructions, and (dummy) BAT registers.
20050817	Updating the pckbc to support scancode type 3 keyboards
		(required in order to interact with the SGI O2 PROM).
		Adding more PPC instructions.
20050818	Adding more ARM instructions; general register forms.
		Importing armreg.h from NetBSD (ARM cpu ids). Adding a (dummy)
		CATS machine mode (using SA110 as the default CPU).
		Continuing on general dyntrans related stuff.
20050819	Register forms for ARM load/stores. Gaah! The Compaq C Compiler
		bug is triggered for ARM loads as well, not just PPC :-(
		Adding full support for ARM PC-relative load/stores, and load/
		stores where the PC register is the destination register.
		Adding support for ARM a.out binaries.
20050820	Continuing to add more ARM instructions, and correcting some
		bugs. Continuing on CATS emulation.
		More work on the PPC stuff.
20050821	Minor PPC and ARM updates. Adding more machine types.
20050822	All ARM "data processing instructions" are now generated
		automatically.
20050824	Beginning the work on the ARM system control coprocessor.
		Adding support for ARM halfword load/stores, and signed loads.
20050825	Fixing an important bug related to the ARM condition codes.
		OpenBSD/zaurus and NetBSD/netwinder now print some boot
		messages. :)
		Adding a dummy SH (Hitachi SuperH) cpu family.
		Beginning to add some ARM virtual address translation.
		MIPS bugfixes: unaligned PC now cause an ADEL exception (at
		least for non-bintrans execution), and ADEL/ADES (not
		TLBL/TLBS) are used if userland tries to access kernel space.
		(Thanks to Joshua Wise for making me aware of these bugs.)
20050827	More work on the ARM emulation, and various other updates.
20050828	More ARM updates.
		Finally taking the time to work on translation invalidation
		(i.e. invalidating translated code mappings when memory is
		written to). Hopefully this doesn't break anything.
20050829	Moving CPU related files from src/ to a new subdir, src/cpus/.
		Moving PROM emulation stuff from src/ to src/promemul/.
		Better debug instruction trace for ARM loads and stores.
20050830	Various ARM updates (correcting CMP flag calculation, etc).
20050831	PPC instruction updates. (Flag fixes, etc.)
20050901	Various minor PPC and ARM instruction emulation updates.
		Minor OpenFirmware emulation updates.
20050903	Adding support for adding arbitrary ARM coprocessors (with
		the i80321 I/O coprocessor as a first test).
		Various other ARM and PPC updates.
20050904	Adding some SHcompact disassembly routines.
20050907	(Re)adding a dummy HPPA CPU module, and a dummy i960 module.
20050908	Began hacking on some Apple Partition Table support.
20050909	Adding support for loading Mach-O (Darwin PPC) binaries.
20050910	Fixing an ARM bug (Carry flag was incorrectly updated for some
		data processing instructions); OpenBSD/cats and NetBSD/
		netwinder get quite a bit further now.
		Applying a patch to dev_wdc, and a one-liner to dev_pcic, to
		make them work better when emulating new versions of OpenBSD.
		(Thanks to Alexander Yurchenko for the patches.)
		Also doing some other minor updates to dev_wdc. (Some cleanup,
		and finally converting to devinit, etc.)
20050912	IRIX doesn't have u_int64_t by default (noticed by Andreas
		<avr@gnulinux.nl>); configure updated to reflect this.
		Working on ARM register bank switching, CPSR vs SPSR issues,
		and beginning the work on interrupt/exception support.
20050913	Various minor ARM updates (speeding up load/store multiple,
		and fixing a ROR bug in R(); NetBSD/cats now boots as far as
		OpenBSD/cats).
20050917	Adding a dummy Atmel AVR (8-bit) cpu family skeleton.
20050918	Various minor updates.
20050919	Symbols are now loaded from Mach-O executables.
		Continuing the work on adding ARM exception support.
20050920	More work on ARM stuff: OpenBSD/cats and NetBSD/cats reach
		userland! :-)
20050921	Some more progress on ARM interrupt specifics.
20050923	Fixing linesize for VR4121 (patch by Yurchenko). Also fixing
		linesizes/cachesizes for some other VR4xxx.
		Adding a dummy Acer Labs M1543 PCI-ISA bridge (for CATS) and a
		dummy Symphony Labs 83C553 bridge (for Netwinder), usable by 
		dev_footbridge.
20050924	Some PPC progress.
20050925	More PPC progress.
20050926	PPC progress (fixing some bugs etc); Darwin's kernel gets
		slightly further than before.
20050928	Various updates: footbridge/ISA/pciide stuff, and finally
		fixing the VGA text scroll-by-changing-the-base-offset bug.
20050930	Adding a dummy S3 ViRGE pci card for CATS emulation, which
		both NetBSD and OpenBSD detects as VGA.
		Continuing on Footbridge (timers, ISA interrupt stuff).
20051001	Continuing... there are still bugs, probably interrupt-
		related.
20051002	More work on the Footbridge (interrupt stuff).
20051003	Various minor updates. (Trying to find the bug(s).)
20051004	Continuing on the ARM stuff.
20051005	More ARM-related fixes.
20051007	FINALLY! Found and fixed 2 ARM bugs: 1 memory related, and the
		other was because of an error in the ARM manual (load multiple
		with the S-bit set should _NOT_ load usermode registers, as the
		manual says, but it should load saved registers, which may or
		may not happen to be usermode registers).
		NetBSD/cats and OpenBSD/cats seem to install fine now :-)
		except for a minor bug at the end of the OpenBSD/cats install.
		Updating the documentation, preparing for the next release.
20051008	Continuing with release testing and cleanup.

1 /*
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 * $Id: cpu_m68k.c,v 1.3 2005/09/17 17:14:27 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 "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 cpu->invalidate_translation_caches_paddr =
70 m68k_invalidate_translation_caches_paddr;
71 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

  ViewVC Help
Powered by ViewVC 1.1.26