/[gxemul]/trunk/src/devices/dev_mb8696x.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/devices/dev_mb8696x.c

Parent Directory Parent Directory | Revision Log Revision Log

Revision 42 - (show annotations)
Mon Oct 8 16:22:32 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 8009 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1613 2007/06/15 20:11:26 debug Exp $
20070501	Continuing a little on m88k disassembly (control registers,
		more instructions).
		Adding a dummy mvme88k machine mode.
20070502	Re-adding MIPS load/store alignment exceptions.
20070503	Implementing more of the M88K disassembly code.
20070504	Adding disassembly of some more M88K load/store instructions.
		Implementing some relatively simple M88K instructions (br.n,
		xor[.u] imm, and[.u] imm).
20070505	Implementing M88K three-register and, or, xor, and jmp[.n],
		bsr[.n] including function call trace stuff.
		Applying a patch from Bruce M. Simpson which implements the
		SYSCON_BOARD_CPU_CLOCK_FREQ_ID object of the syscon call in
		the yamon PROM emulation.
20070506	Implementing M88K bb0[.n] and bb1[.n], and skeletons for
		ldcr and stcr (although no control regs are implemented yet).
20070509	Found and fixed the bug which caused Linux for QEMU_MIPS to
		stop working in 0.4.5.1: It was a faulty change to the MIPS
		'sc' and 'scd' instructions I made while going through gcc -W
		warnings on 20070428.
20070510	Updating the Linux/QEMU_MIPS section in guestoses.html to
		use mips-test-0.2.tar.gz instead of 0.1.
		A big thank you to Miod Vallat for sending me M88K manuals.
		Implementing more M88K instructions (addu, subu, div[u], mulu,
		ext[u], clr, set, cmp).
20070511	Fixing bugs in the M88K "and" and "and.u" instructions (found
		by comparing against the manual).
		Implementing more M88K instructions (mask[.u], mak, bcnd (auto-
		generated)) and some more control register details.
		Cleanup: Removing the experimental AVR emulation mode and
		corresponding devices; AVR emulation wasn't really meaningful.
		Implementing autogeneration of most M88K loads/stores. The
		rectangle drawing demo (with -O0) for M88K runs :-)
		Beginning on M88K exception handling.
		More M88K instructions: tb0, tb1, rte, sub, jsr[.n].
		Adding some skeleton MVME PROM ("BUG") emulation.
20070512	Fixing a bug in the M88K cmp instruction.
		Adding the M88K lda (scaled register) instruction.
		Fixing bugs in 64-bit (32-bit pairs) M88K loads/stores.
		Removing the unused tick_hz stuff from the machine struct.
		Implementing the M88K xmem instruction. OpenBSD/mvme88k gets
		far enough to display the Copyright banner :-)
		Implementing subu.co (guess), addu.co, addu.ci, ff0, and ff1.
		Adding a dev_mvme187, for MVME187-specific devices/registers.
		OpenBSD/mvme88k prints more boot messages. :)
20070515	Continuing on MVME187 emulation (adding more devices, beginning
		on the CMMUs, etc).
		Adding the M88K and.c, xor.c, and or.c instructions, and making
		sure that mul, div, etc cause exceptions if executed when SFD1
		is disabled.
20070517	Continuing on M88K and MVME187 emulation in general; moving
		the CMMU registers to the CPU struct, separating dev_pcc2 from
		dev_mvme187, and beginning on memory_m88k.c (BATC and PATC).
		Fixing a bug in 64-bit (32-bit pairs) M88K fast stores.
		Implementing the clock part of dev_mk48txx.
		Implementing the M88K fstcr and xcr instructions.
		Implementing m88k_cpu_tlbdump().
		Beginning on the implementation of a separate address space
		for M88K .usr loads/stores.
20070520	Removing the non-working (skeleton) Sandpoint, SonyNEWS, SHARK
		Dnard, and Zaurus machine modes.
		Experimenting with dyntrans to_be_translated read-ahead. It
		seems to give a very small performance increase for MIPS
		emulation, but a large performance degradation for SuperH. Hm.
20070522	Disabling correct SuperH ITLB emulation; it does not seem to be
		necessary in order to let SH4 guest OSes run, and it slows down
		userspace code.
		Implementing "samepage" branches for SuperH emulation, and some
		other minor speed hacks.
20070525	Continuing on M88K memory-related stuff: exceptions, memory
		transaction register contents, etc.
		Implementing the M88K subu.ci instruction.
		Removing the non-working (skeleton) Iyonix machine mode.
		OpenBSD/mvme88k reaches userland :-), starts executing
		/sbin/init's instructions, and issues a few syscalls, before
		crashing.
20070526	Fixing bugs in dev_mk48txx, so that OpenBSD/mvme88k detects
		the correct time-of-day.
		Implementing a generic IRQ controller for the test machines
		(dev_irqc), similar to a proposed patch from Petr Stepan.
		Experimenting some more with translation read-ahead.
		Adding an "expect" script for automated OpenBSD/landisk
		install regression/performance tests.
20070527	Adding a dummy mmEye (SH3) machine mode skeleton.
		FINALLY found the strange M88K bug I have been hunting: I had
		not emulated the SNIP value for exceptions occurring in
		branch delay slots correctly.
		Implementing correct exceptions for 64-bit M88K loads/stores.
		Address to symbol lookups are now disabled when M88K is
		running in usermode (because usermode addresses don't have
		anything to do with supervisor addresses).
20070531	Removing the mmEye machine mode skeleton.
20070604	Some minor code cleanup.
20070605	Moving src/useremul.c into a subdir (src/useremul/), and
		cleaning up some more legacy constructs.
		Adding -Wstrict-aliasing and -fstrict-aliasing detection to
		the configure script.
20070606	Adding a check for broken GCC on Solaris to the configure
		script. (GCC 3.4.3 on Solaris cannot handle static variables
		which are initialized to 0 or NULL. :-/)
		Removing the old (non-working) ARC emulation modes: NEC RD94,
		R94, R96, and R98, and the last traces of Olivetti M700 and
		Deskstation Tyne.
		Removing the non-working skeleton WDSC device (dev_wdsc).
20070607	Thinking about how to use the host's cc + ld at runtime to
		generate native code. (See experiments/native_cc_ld_test.i
		for an example.)
20070608	Adding a program counter sampling timer, which could be useful
		for native code generation experiments.
		The KN02_CSR_NRMMOD bit in the DECstation 5000/200 (KN02) CSR
		should always be set, to allow a 5000/200 PROM to boot.
20070609	Moving out breakpoint details from the machine struct into
		a helper struct, and removing the limit on max nr of
		breakpoints.
20070610	Moving out tick functions into a helper struct as well (which
		also gets rid of the max limit).
20070612	FINALLY figured out why Debian/DECstation stopped working when
		translation read-ahead was enabled: in src/memory_rw.c, the
		call to invalidate_code_translation was made also if the
		memory access was an instruction load (if the page was mapped
		as writable); it shouldn't be called in that case.
20070613	Implementing some more MIPS32/64 revision 2 instructions: di,
		ei, ext, dext, dextm, dextu, and ins.
20070614	Implementing an instruction combination for the NetBSD/arm
		idle loop (making the host not use any cpu if NetBSD/arm
		inside the emulator is not using any cpu).
		Increasing the nr of ARM VPH entries from 128 to 384.
20070615	Removing the ENABLE_arch stuff from the configure script, so
		that all included architectures are included in both release
		and development builds.
		Moving memory related helper functions from misc.c to memory.c.
		Adding preliminary instructions for netbooting NetBSD/pmppc to
		guestoses.html; it doesn't work yet, there are weird timeouts.
		Beginning a total rewrite of the userland emulation modes
		(removing all emulation modes, beginning from scratch with
		NetBSD/MIPS and FreeBSD/Alpha only).
20070616	After fixing a bug in the DEC21143 NIC (the TDSTAT_OWN bit was
		only cleared for the last segment when transmitting, not all
		segments), NetBSD/pmppc boots with root-on-nfs without the
		timeouts. Updating guestoses.html.
		Removing the skeleton PSP (Playstation Portable) mode.
		Moving X11-related stuff in the machine struct into a helper
		struct.
		Cleanup of out-of-memory checks, to use a new CHECK_ALLOCATION
		macro (which prints a meaningful error message).
		Adding a COMMENT to each machine and device (for automagic
		.index comment generation).
		Doing regression testing for the next release.

==============  RELEASE 0.4.6  ==============
1 /*
2 * Copyright (C) 2006-2007 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: dev_mb8696x.c,v 1.4 2007/06/15 19:11:15 debug Exp $
29 *
30 * COMMENT: Fujitsu MB8696x Ethernet interface (used in the Dreamcast)
31 *
32 * Used as the LAN adapter (MB86967) in the Dreamcast machine mode.
33 *
34 *
35 * Note: This is just a bogus module so far.
36 *
37 * (TODO: "Reverse engineer" more of NetBSD's mb86960.c to implement this.)
38 */
39
40 #include <stdio.h>
41 #include <stdlib.h>
42 #include <string.h>
43 #include <sys/time.h>
44
45 #include "cpu.h"
46 #include "device.h"
47 #include "machine.h"
48 #include "memory.h"
49 #include "misc.h"
50 #include "net.h"
51
52 #include "mb86960reg.h"
53
54
55 #ifdef UNSTABLE_DEVEL
56 #define MB8696X_DEBUG
57 #endif
58
59 #ifdef MB8696X_DEBUG
60 #define debug fatal
61 #endif
62
63 struct mb8696x_data {
64 int addr_mult;
65
66 /*
67 * Registers:
68 *
69 * reg contains 32 registers. However, registers 8..15 are bank-
70 * switched, based on a setting in FE_DLCR7. mar_8_15 are "multicast
71 * address registers", and bmpr_8_15 are "buffer memory port
72 * registers".
73 */
74 uint8_t reg[MB8696X_NREGS];
75 uint8_t mar_8_15[8];
76 uint8_t bmpr_8_15[8];
77
78 /* EEPROM contents and internal state during a read operation: */
79 uint8_t eeprom[FE_EEPROM_SIZE];
80 int eeprom_state;
81 uint8_t eeprom_bit_count;
82 uint8_t eeprom_command;
83 uint16_t eeprom_data;
84 };
85
86 #define EEPROM_STATE_NOTHING 0
87 #define EEPROM_STATE_READY 1 /* Waiting for start bit */
88 #define EEPROM_STATE_COMMAND 2 /* Waiting for 8 command bits */
89 #define EEPROM_STATE_READ 3
90
91
92 DEVICE_ACCESS(mb8696x)
93 {
94 struct mb8696x_data *d = extra;
95 uint64_t idata = 0, odata = 0;
96 uint8_t *reg_ptr;
97
98 if (writeflag == MEM_WRITE)
99 idata = memory_readmax64(cpu, data, len);
100
101 relative_addr /= d->addr_mult;
102
103 /*
104 * Default result on reads: (Note special treatment of banked regs.)
105 */
106 reg_ptr = &d->reg[relative_addr];
107 if (relative_addr >= 8 && relative_addr <= 15 &&
108 (d->reg[FE_DLCR7] & FE_D7_RBS) == FE_D7_RBS_MAR)
109 reg_ptr = &d->mar_8_15[relative_addr - 8];
110 if (relative_addr >= 8 && relative_addr <= 15 &&
111 (d->reg[FE_DLCR7] & FE_D7_RBS) == FE_D7_RBS_BMPR)
112 reg_ptr = &d->bmpr_8_15[relative_addr - 8];
113
114 odata = *reg_ptr;
115
116
117 switch (relative_addr) {
118
119 case FE_DLCR0: /* TX interrupt status */
120 case FE_DLCR1: /* RX interrupt status */
121 /* Write-1-to-clear: */
122 if (writeflag == MEM_WRITE)
123 (*reg_ptr) &= ~idata;
124
125 /* TODO: reassert interrupts */
126
127 break;
128
129 case FE_DLCR2: /* TX interrupt control */
130 case FE_DLCR3: /* RX interrupt control */
131 if (writeflag == MEM_WRITE)
132 (*reg_ptr) = idata;
133
134 /* TODO: reassert interrupts */
135
136 break;
137
138 case FE_DLCR6:
139 case FE_DLCR8: /* Ethernet addr byte 0 */
140 case FE_DLCR9: /* Ethernet addr byte 1 */
141 case FE_DLCR10: /* Ethernet addr byte 2 */
142 case FE_DLCR11: /* Ethernet addr byte 3 */
143 case FE_DLCR12: /* Ethernet addr byte 4 */
144 case FE_DLCR13: /* Ethernet addr byte 5 */
145 if (writeflag == MEM_WRITE)
146 (*reg_ptr) = idata;
147 break;
148
149 case FE_DLCR7:
150 if (writeflag == MEM_WRITE) {
151 /* Identification cannot be overwritten: */
152 (*reg_ptr) &= FE_D7_IDENT;
153 (*reg_ptr) |= (idata & ~FE_D7_IDENT);
154 }
155 break;
156
157 case FE_BMPR16:
158 /* EEPROM control */
159 if (writeflag == MEM_WRITE) {
160 if (idata & ~(FE_B16_DOUT | FE_B16_DIN |
161 FE_B16_SELECT | FE_B16_CLOCK)) {
162 fatal("mb8696x: UNIMPLEMENTED bits when "
163 "writing to FE_BMPR16: 0x%02x\n",
164 (int)idata);
165 exit(1);
166 }
167
168 /* Dropped out of select state? */
169 if (!(idata & FE_B16_SELECT))
170 d->eeprom_state = EEPROM_STATE_NOTHING;
171
172 /* Switching to select state? */
173 if (!((*reg_ptr) & FE_B16_SELECT) &&
174 idata & FE_B16_SELECT)
175 d->eeprom_state = EEPROM_STATE_READY;
176
177 /* Bit clock? */
178 if (!((*reg_ptr) & FE_B16_CLOCK) &&
179 idata & FE_B16_CLOCK) {
180 int bit = d->reg[FE_BMPR17] & FE_B17_DATA? 1:0;
181 switch (d->eeprom_state) {
182 case EEPROM_STATE_READY:
183 d->eeprom_state = EEPROM_STATE_COMMAND;
184 d->eeprom_bit_count = 0;
185 break;
186 case EEPROM_STATE_COMMAND:
187 d->eeprom_bit_count ++;
188 d->eeprom_command <<= 1;
189 d->eeprom_command |= bit;
190 if (d->eeprom_bit_count == 8) {
191 int addr = (d->eeprom_command
192 & 0x7f) << 1;
193 /* printf("COMMAND=%08x\n",
194 d->eeprom_command); */
195 if (!(d->eeprom_command&0x80)) {
196 fatal("WRITES to the "
197 "EEPROM are not yet"
198 " implemented.\n");
199 exit(1);
200 }
201 /* This is a read command. */
202 d->eeprom_bit_count = 0;
203 d->eeprom_state =
204 EEPROM_STATE_READ;
205 d->eeprom_data = d->eeprom[addr]
206 * 256 + d->eeprom[addr+1];
207 }
208 break;
209 case EEPROM_STATE_READ:
210 d->reg[FE_BMPR17] = 0;
211 if (d->eeprom_data & 0x8000)
212 d->reg[FE_BMPR17] = FE_B17_DATA;
213 d->eeprom_data <<= 1;
214 d->eeprom_bit_count ++;
215 if (d->eeprom_bit_count > 16)
216 fatal("[ WARNING: more than 16"
217 " bits of EEPROM data "
218 "read? ]\n");
219 break;
220 }
221 }
222
223 (*reg_ptr) = idata;
224 }
225 break;
226
227 case FE_BMPR17:
228 /* EEPROM data */
229 if (writeflag == MEM_WRITE) {
230 if (idata & ~FE_B17_DATA) {
231 fatal("mb8696x: UNIMPLEMENTED bits when "
232 "writing to FE_BMPR17: 0x%02x\n",
233 (int)idata);
234 exit(1);
235 }
236 (*reg_ptr) = idata;
237 }
238 break;
239
240 default:
241 {
242 char *bank = "";
243 if ((d->reg[FE_DLCR7] & FE_D7_RBS) == FE_D7_RBS_MAR)
244 bank = " (bank MAR)";
245 if ((d->reg[FE_DLCR7] & FE_D7_RBS) == FE_D7_RBS_BMPR)
246 bank = " (bank BMPR)";
247 if (writeflag == MEM_READ) {
248 fatal("[ mb8696x: read from UNIMPLEMENTED reg "
249 "%i%s ]\n", (int)relative_addr, bank);
250 } else {
251 fatal("[ mb8696x: write to UNIMPLEMENTED reg "
252 "%i%s: 0x%02x ]\n", (int)relative_addr,
253 bank, (int)idata);
254 }
255
256 #ifdef MB8696X_DEBUG
257 exit(1);
258 #endif
259 }
260 }
261
262 if (writeflag == MEM_READ)
263 memory_writemax64(cpu, data, len, odata);
264
265 return 1;
266 }
267
268
269 DEVINIT(mb8696x)
270 {
271 struct mb8696x_data *d;
272
273 CHECK_ALLOCATION(d = malloc(sizeof(struct mb8696x_data)));
274 memset(d, 0, sizeof(struct mb8696x_data));
275
276 d->addr_mult = devinit->addr_mult;
277
278 memory_device_register(devinit->machine->memory, devinit->name,
279 devinit->addr, MB8696X_NREGS * d->addr_mult, dev_mb8696x_access, d,
280 DM_DEFAULT, NULL);
281
282 /* NetBSD/dreamcast expects ident = 86967. */
283 d->reg[FE_DLCR7] = FE_D7_IDENT_86967;
284
285 /*
286 * Generate the MAC address, both in the first 6 bytes of the
287 * EEPROM, and in DLCR8..13:
288 */
289 net_generate_unique_mac(devinit->machine, &d->eeprom[0]);
290 memcpy(&d->reg[FE_DLCR8], &d->eeprom[0], 6);
291
292 return 1;
293 }
294
  ViewVC Help
Powered by ViewVC 1.1.26