/[gxemul]/trunk/src/devices/dev_dec5800.c
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Contents of /trunk/src/devices/dev_dec5800.c

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Revision 34 - (show annotations)
Mon Oct 8 16:21:17 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 13051 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1480 2007/02/19 01:34:42 debug Exp $
20061029	Changing usleep(1) calls in the debugger to usleep(10000)
20061107	Adding a new disk image option (-d o...) which sets the ISO9660
		filesystem base offset; also making some other hacks to allow
		NetBSD/dreamcast and homebrew demos/games to boot directly
		from a filesystem image.
		Moving Dreamcast-specific stuff in the documentation to its
		own page (dreamcast.html).
		Adding a border to the Dreamcast PVR framebuffer.
20061108	Adding a -T command line option (again?), for halting the
		emulator on unimplemented memory accesses.
20061109	Continuing on various SH4 and Dreamcast related things.
		The emulator should now halt on more unimplemented device
		accesses, instead of just printing a warning, forcing me to
		actually implement missing stuff :)
20061111	Continuing on SH4 and Dreamcast stuff.
		Adding a bogus Landisk (SH4) machine mode.
20061112	Implementing some parts of the Dreamcast GDROM device. With
		some ugly hacks, NetBSD can (barely) mount an ISO image.
20061113	NetBSD/dreamcast now starts booting from the Live CD image,
		but crashes randomly quite early on in the boot process.
20061122	Beginning on a skeleton interrupt.h and interrupt.c for the
		new interrupt subsystem.
20061124	Continuing on the new interrupt system; taking the first steps
		to attempt to connect CPUs (SuperH and MIPS) and devices
		(dev_cons and SH4 timer interrupts) to it. Many things will
		probably break from now on.
20061125	Converting dev_ns16550, dev_8253 to the new interrupt system.
		Attempting to begin to convert the ISA bus.
20061130	Incorporating a patch from Brian Foley for the configure
		script, which checks for X11 libs in /usr/X11R6/lib64 (which
		is used on some Linux systems).
20061227	Adding a note in the man page about booting from Dreamcast
		CDROM images (i.e. that no external kernel is needed).
20061229	Continuing on the interrupt system rewrite: beginning to
		convert more devices, adding abort() calls for legacy interrupt
		system calls so that everything now _has_ to be rewritten!
		Almost all machine modes are now completely broken.
20061230	More progress on removing old interrupt code, mostly related
		to the ISA bus + devices, the LCA bus (on AlphaBook1), and
		the Footbridge bus (for CATS). And some minor PCI stuff.
		Connecting the ARM cpu to the new interrupt system.
		The CATS, NetWinder, and QEMU_MIPS machine modes now work with
		the new interrupt system :)
20061231	Connecting PowerPC CPUs to the new interrupt system.
		Making PReP machines (IBM 6050) work again.
		Beginning to convert the GT PCI controller (for e.g. Malta
		and Cobalt emulation). Some things work, but not everything.
		Updating Copyright notices for 2007.
20070101	Converting dev_kn02 from legacy style to devinit; the 3max
		machine mode now works with the new interrupt system :-]
20070105	Beginning to convert the SGI O2 machine to the new interrupt
		system; finally converting O2 (IP32) devices to devinit, etc.
20070106	Continuing on the interrupt system redesign/rewrite; KN01
		(PMAX), KN230, and Dreamcast ASIC interrupts should work again,
		moving out stuff from machine.h and devices.h into the
		corresponding devices, beginning the rewrite of i80321
		interrupts, etc.
20070107	Beginning on the rewrite of Eagle interrupt stuff (PReP, etc).
20070117	Beginning the rewrite of Algor (V3) interrupts (finally
		changing dev_v3 into devinit style).
20070118	Removing the "bus" registry concept from machine.h, because
		it was practically meaningless.
		Continuing on the rewrite of Algor V3 ISA interrupts.
20070121	More work on Algor interrupts; they are now working again,
		well enough to run NetBSD/algor. :-)
20070122	Converting VR41xx (HPCmips) interrupts. NetBSD/hpcmips
		can be installed using the new interrupt system :-)
20070123	Making the testmips mode work with the new interrupt system.
20070127	Beginning to convert DEC5800 devices to devinit, and to the
		new interrupt system.
		Converting Playstation 2 devices to devinit, and converting
		the interrupt system. Also fixing a severe bug: the interrupt
		mask register on Playstation 2 is bitwise _toggled_ on writes.
20070128	Removing the dummy NetGear machine mode and the 8250 device
		(which was only used by the NetGear machine).
		Beginning to convert the MacPPC GC (Grand Central) interrupt
		controller to the new interrupt system.
		Converting Jazz interrupts (PICA61 etc.) to the new interrupt
		system. NetBSD/arc can be installed again :-)
		Fixing the JAZZ timer (hardcoding it at 100 Hz, works with
		NetBSD and it is better than a completely dummy timer as it
		was before).
		Converting dev_mp to the new interrupt system, although I
		haven't had time to actually test it yet.
		Completely removing src/machines/interrupts.c, cpu_interrupt
		and cpu_interrupt_ack in src/cpu.c, and
		src/include/machine_interrupts.h! Adding fatal error messages
		+ abort() in the few places that are left to fix.
		Converting dev_z8530 to the new interrupt system.
		FINALLY removing the md_int struct completely from the
		machine struct.
		SH4 fixes (adding a PADDR invalidation in the ITLB replacement
		code in memory_sh.c); the NetBSD/dreamcast LiveCD now runs
		all the way to the login prompt, and can be interacted with :-)
		Converting the CPC700 controller (PCI and interrupt controller
		for PM/PPC) to the new interrupt system.
20070129	Fixing MACE ISA interrupts (SGI IP32 emulation). Both NetBSD/
		sgimips' and OpenBSD/sgi's ramdisk kernels can now be
		interacted with again.
20070130	Moving out the MIPS multi_lw and _sw instruction combinations
		so that they are auto-generated at compile time instead.
20070131	Adding detection of amd64/x86_64 hosts in the configure script,
		for doing initial experiments (again :-) with native code
		generation.
		Adding a -k command line option to set the size of the dyntrans
		cache, and a -B command line option to disable native code
		generation, even if GXemul was compiled with support for
		native code generation for the specific host CPU architecture.
20070201	Experimenting with a skeleton for native code generation.
		Changing the default behaviour, so that native code generation
		is now disabled by default, and has to be enabled by using
		-b on the command line.
20070202	Continuing the native code generation experiments.
		Making PCI interrupts work for Footbridge again.
20070203	More native code generation experiments.
		Removing most of the native code generation experimental code,
		it does not make sense to include any quick hacks like this.
		Minor cleanup/removal of some more legacy MIPS interrupt code.
20070204	Making i80321 interrupts work again (for NetBSD/evbarm etc.),
		and fixing the timer at 100 Hz.
20070206	Experimenting with removing the wdc interrupt slowness hack.
20070207	Lowering the number of dyntrans TLB entries for MIPS from
		192 to 128, resulting in a minor speed improvement.
		Minor optimization to the code invalidation routine in
		cpu_dyntrans.c.
20070208	Increasing (experimentally) the nr of dyntrans instructions per
		loop from 60 to 120.
20070210	Commenting out (experimentally) the dyntrans_device_danger
		detection in memory_rw.c.
		Changing the testmips and baremips machines to use a revision 2
		MIPS64 CPU by default, instead of revision 1.
		Removing the dummy i960, IA64, x86, AVR32, and HP PA-RISC
		files, the PC bios emulation, and the Olivetti M700 (ARC) and
		db64360 emulation modes.
20070211	Adding an "mp" demo to the demos directory, which tests the
		SMP functionality of the testmips machine.
		Fixing PReP interrupts some more. NetBSD/prep now boots again.
20070216	Adding a "nop workaround" for booting Mach/PMAX to the
		documentation; thanks to Artur Bujdoso for the values.
		Converting more of the MacPPC interrupt stuff to the new
		system.
		Beginning to convert BeBox interrupts to the new system.
		PPC603e should NOT have the PPC_NO_DEC flag! Removing it.
		Correcting BeBox clock speed (it was set to 100 in the NetBSD
		bootinfo block, but should be 33000000/4), allowing NetBSD
		to start without using the (incorrect) PPC_NO_DEC hack.
20070217	Implementing (slow) AltiVec vector loads and stores, allowing
		NetBSD/macppc to finally boot using the GENERIC kernel :-)
		Updating the documentation with install instructions for
		NetBSD/macppc.
20070218-19	Regression testing for the release.

==============  RELEASE 0.4.4  ==============


1 /*
2 * Copyright (C) 2003-2007 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_dec5800.c,v 1.21 2007/01/28 00:41:16 debug Exp $
29 *
30 * Emulation of devices found in a DECsystem 58x0, where x is the number
31 * of CPUs in the system. (The CPU board is called KN5800 by Ultrix.)
32 *
33 * o) timers and misc stuff
34 * o) BI (Backplane Interconnect)
35 * o) CCA (Console Communication Area)
36 * o) XMI (Extended Memory Interconnect)
37 *
38 * TODO: This hardware is not very easy to find docs about.
39 * Perhaps VAX 6000/300 docs?
40 */
41
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45
46 #include "console.h"
47 #include "cpu.h"
48 #include "device.h"
49 #include "devices.h"
50 #include "interrupt.h"
51 #include "machine.h"
52 #include "memory.h"
53 #include "misc.h"
54
55
56 #define DEV_DEC5800_LENGTH 0x1000 /* TODO */
57
58 struct dec5800_data {
59 uint32_t csr;
60 struct interrupt cpu_irq;
61
62 uint32_t vector_0x50;
63
64 struct interrupt timer_irq;
65 };
66
67
68 void dec5800_interrupt_assert(struct interrupt *interrupt)
69 {
70 struct dec5800_data *d = interrupt->extra;
71 d->csr |= (1 << interrupt->line);
72 if (d->csr & 0x10000000)
73 INTERRUPT_ASSERT(d->cpu_irq);
74 }
75 void dec5800_interrupt_deassert(struct interrupt *interrupt)
76 {
77 struct dec5800_data *d = interrupt->extra;
78 d->csr &= ~(1 << interrupt->line);
79 if (!(d->csr & 0x10000000))
80 INTERRUPT_DEASSERT(d->cpu_irq);
81 }
82
83
84 DEVICE_TICK(dec5800)
85 {
86 struct dec5800_data *d = extra;
87
88 /* Timer interrupts? */
89 if (d->csr & 0x8000) {
90 debug("[ dec5800: timer interrupt! ]\n");
91
92 /* Set timer interrupt pending bit: */
93 d->csr |= 0x20000000;
94
95 INTERRUPT_ASSERT(d->timer_irq);
96 }
97 }
98
99
100 DEVICE_ACCESS(dec5800_vectors)
101 {
102 uint64_t idata = 0, odata = 0;
103 struct dec5800_data *d = extra;
104
105 if (writeflag == MEM_WRITE)
106 idata = memory_readmax64(cpu, data, len);
107
108 if (writeflag == MEM_READ) {
109 /* TODO */
110 /* 0xfc = transmit interrupt, 0xf8 = receive interrupt,
111 0x80 = IPI */
112 odata = d->vector_0x50;
113 /* odata = 0xfc; */
114 debug("[ dec5800_vectors: read from 0x%02x: 0x%02x ]\n",
115 (int)relative_addr, (int)odata);
116 } else {
117 d->vector_0x50 = idata;
118 debug("[ dec5800_vectors: write to 0x%02x: 0x%02x ]\n",
119 (int)relative_addr, (int)idata);
120 }
121
122 if (writeflag == MEM_READ)
123 memory_writemax64(cpu, data, len, odata);
124
125 return 1;
126 }
127
128
129 DEVICE_ACCESS(dec5800)
130 {
131 uint64_t idata = 0, odata = 0;
132 struct dec5800_data *d = extra;
133
134 if (writeflag == MEM_WRITE)
135 idata = memory_readmax64(cpu, data, len);
136
137 /* Lowest 4 bits of csr contain cpu id: */
138 d->csr = (d->csr & ~0xf) | (cpu->cpu_id & 0xf);
139
140 switch (relative_addr) {
141 case 0x0000: /* csr */
142 if (writeflag == MEM_READ) {
143 odata = d->csr;
144 odata ^= random() & 0x10000;
145 debug("[ dec5800: read from csr: 0x%08x ]\n",
146 (int)odata);
147 } else {
148 d->csr = idata;
149
150 /* Ack. timer interrupts: */
151 d->csr &= ~0x20000000;
152 INTERRUPT_DEASSERT(d->timer_irq);
153
154 debug("[ dec5800: write to csr: 0x%08x ]\n",
155 (int)idata);
156 }
157 break;
158 default:
159 if (writeflag==MEM_READ) {
160 debug("[ dec5800: read from 0x%08lx ]\n",
161 (long)relative_addr);
162 } else {
163 debug("[ dec5800: write to 0x%08lx: 0x%08x ]\n",
164 (long)relative_addr, (int)idata);
165 }
166 }
167
168 if (writeflag == MEM_READ)
169 memory_writemax64(cpu, data, len, odata);
170
171 return 1;
172 }
173
174
175 DEVINIT(dec5800)
176 {
177 struct dec5800_data *d;
178 char tmpstr[200];
179 int i;
180
181 d = malloc(sizeof(struct dec5800_data));
182 if (d == NULL) {
183 fprintf(stderr, "out of memory\n");
184 exit(1);
185 }
186 memset(d, 0, sizeof(struct dec5800_data));
187
188 snprintf(tmpstr, sizeof(tmpstr), "%s.2", devinit->interrupt_path);
189 INTERRUPT_CONNECT(tmpstr, d->cpu_irq);
190
191 snprintf(tmpstr, sizeof(tmpstr), "%s.3", devinit->interrupt_path);
192 INTERRUPT_CONNECT(tmpstr, d->timer_irq);
193
194 /* Register 32 CSR interrupts, corresponding to bits in the CSR: */
195 for (i=0; i<32; i++) {
196 char n[200];
197 struct interrupt template;
198 snprintf(n, sizeof(n), "%s.dec5800.%i",
199 devinit->interrupt_path, i);
200 memset(&template, 0, sizeof(template));
201 template.line = i;
202 template.name = n;
203 template.extra = d;
204 template.interrupt_assert = dec5800_interrupt_assert;
205 template.interrupt_deassert = dec5800_interrupt_deassert;
206 interrupt_handler_register(&template);
207 }
208
209 memory_device_register(devinit->machine->memory, "dec5800",
210 devinit->addr, DEV_DEC5800_LENGTH, dev_dec5800_access,
211 d, DM_DEFAULT, NULL);
212 memory_device_register(devinit->machine->memory, "dec5800_vectors",
213 devinit->addr + 0x30000000, 0x100, dev_dec5800_vectors_access,
214 d, DM_DEFAULT, NULL);
215 machine_add_tickfunction(devinit->machine, dev_dec5800_tick,
216 d, 14, 0.0);
217
218 return 1;
219 }
220
221
222 /*****************************************************************************/
223
224
225 #include "bireg.h"
226
227 /* 16 slots, 0x2000 bytes each */
228 #define DEV_DECBI_LENGTH 0x20000
229
230 struct decbi_data {
231 int csr[NNODEBI];
232 };
233
234
235 DEVICE_ACCESS(decbi)
236 {
237 uint64_t idata = 0, odata = 0;
238 int node_nr;
239 struct decbi_data *d = extra;
240
241 if (writeflag == MEM_WRITE)
242 idata = memory_readmax64(cpu, data, len);
243
244 relative_addr += BI_NODESIZE; /* HACK */
245
246 node_nr = relative_addr / BI_NODESIZE;
247 relative_addr &= (BI_NODESIZE - 1);
248
249 /* TODO: This "1" here is the max node number in actual use. */
250 if (node_nr > 1 || node_nr >= NNODEBI)
251 return 0;
252
253 switch (relative_addr) {
254 case BIREG_DTYPE:
255 if (writeflag==MEM_READ) {
256 /*
257 * This is a list of the devices in our BI slots:
258 */
259 switch (node_nr) {
260 case 1: odata = BIDT_KDB50; break; /* Disk */
261 /* case 2: odata = BIDT_DEBNA; break; */
262 /* BIDT_DEBNA = Ethernet */
263 /* case 3: odata = BIDT_MS820; break; */
264 /* BIDT_MS820 = Memory */
265 default:
266 /* No device. */
267 odata = 0;
268 }
269
270 debug("[ decbi: (node %i) read from BIREG_DTYPE:"
271 " 0x%x ]\n", node_nr, (int)odata);
272 } else {
273 debug("[ decbi: (node %i) attempt to write to "
274 "BIREG_DTYPE: 0x%08x ]\n", node_nr, (int)idata);
275 }
276 break;
277 case BIREG_VAXBICSR:
278 if (writeflag==MEM_READ) {
279 odata = (d->csr[node_nr] & ~BICSR_NODEMASK) | node_nr;
280 debug("[ decbi: (node %i) read from BIREG_"
281 "VAXBICSR: 0x%x ]\n", node_nr, (int)odata);
282 } else {
283 d->csr[node_nr] = idata;
284 debug("[ decbi: (node %i) attempt to write to "
285 "BIREG_VAXBICSR: 0x%08x ]\n", node_nr, (int)idata);
286 }
287 break;
288 case 0xf4:
289 if (writeflag==MEM_READ) {
290 odata = 0xffff; /* ? */
291 debug("[ decbi: (node %i) read from 0xf4: "
292 "0x%x ]\n", node_nr, (int)odata);
293 } else {
294 debug("[ decbi: (node %i) attempt to write "
295 "to 0xf4: 0x%08x ]\n", node_nr, (int)idata);
296 }
297 break;
298 default:
299 if (writeflag==MEM_READ) {
300 debug("[ decbi: (node %i) read from unimplemented "
301 "0x%08lx ]\n", node_nr, (long)relative_addr,
302 (int)odata);
303 } else {
304 debug("[ decbi: (node %i) write to unimplemented "
305 "0x%08lx: 0x%08x ]\n", node_nr,
306 (long)relative_addr, (int)idata);
307 }
308 }
309
310 if (writeflag == MEM_READ)
311 memory_writemax64(cpu, data, len, odata);
312
313 return 1;
314 }
315
316
317 DEVINIT(decbi)
318 {
319 struct decbi_data *d;
320
321 d = malloc(sizeof(struct decbi_data));
322 if (d == NULL) {
323 fprintf(stderr, "out of memory\n");
324 exit(1);
325 }
326 memset(d, 0, sizeof(struct decbi_data));
327
328 memory_device_register(devinit->machine->memory, "decbi",
329 devinit->addr + 0x2000, DEV_DECBI_LENGTH - 0x2000,
330 dev_decbi_access, d, DM_DEFAULT, NULL);
331
332 return 1;
333 }
334
335
336 /*****************************************************************************/
337
338
339 /*
340 * CCA, "Console Communication Area" for a DEC 5800 SMP system.
341 */
342
343 struct deccca_data {
344 int dummy;
345 };
346
347
348 DEVICE_ACCESS(deccca)
349 {
350 uint64_t idata = 0, odata = 0;
351 /* struct deccca_data *d = extra; */
352
353 if (writeflag == MEM_WRITE)
354 idata = memory_readmax64(cpu, data, len);
355
356 switch (relative_addr) {
357 case 6:
358 case 7:
359 /* CCA "ID" bytes? These must be here, or Ultrix complains. */
360 if (writeflag == MEM_READ)
361 odata = 67;
362 break;
363 case 8:
364 if (writeflag == MEM_READ)
365 odata = cpu->machine->ncpus;
366 break;
367 case 20:
368 if (writeflag == MEM_READ)
369 odata = (1 << cpu->machine->ncpus) - 1;
370 /* one bit for each cpu */
371 break;
372 case 28:
373 if (writeflag == MEM_READ)
374 odata = (1 << cpu->machine->ncpus) - 1;
375 /* one bit for each enabled(?) cpu */
376 break;
377 default:
378 if (writeflag==MEM_READ) {
379 debug("[ deccca: read from 0x%08lx ]\n",
380 (long)relative_addr);
381 } else {
382 debug("[ deccca: write to 0x%08lx: 0x%08x ]\n",
383 (long)relative_addr, (int)idata);
384 }
385 }
386
387 if (writeflag == MEM_READ)
388 memory_writemax64(cpu, data, len, odata);
389
390 return 1;
391 }
392
393
394 /*
395 * dev_deccca_init():
396 */
397 void dev_deccca_init(struct memory *mem, uint64_t baseaddr)
398 {
399 struct deccca_data *d;
400
401 d = malloc(sizeof(struct deccca_data));
402 if (d == NULL) {
403 fprintf(stderr, "out of memory\n");
404 exit(1);
405 }
406 memset(d, 0, sizeof(struct deccca_data));
407
408 memory_device_register(mem, "deccca", baseaddr, DEV_DECCCA_LENGTH,
409 dev_deccca_access, d, DM_DEFAULT, NULL);
410 }
411
412
413 /*****************************************************************************/
414
415
416 /*
417 * DEC 5800 XMI (this has to do with SMP...)
418 */
419
420 #include "xmireg.h"
421
422 struct decxmi_data {
423 uint32_t reg_0xc[NNODEXMI];
424 };
425
426
427 /*
428 * dev_decxmi_access():
429 */
430 DEVICE_ACCESS(decxmi)
431 {
432 uint64_t idata = 0, odata = 0;
433 int node_nr;
434 struct decxmi_data *d = extra;
435
436 if (writeflag == MEM_WRITE)
437 idata = memory_readmax64(cpu, data, len);
438
439 node_nr = relative_addr / XMI_NODESIZE;
440 relative_addr &= (XMI_NODESIZE - 1);
441
442 if (node_nr >= cpu->machine->ncpus + 1 || node_nr >= NNODEXMI)
443 return 0;
444
445 switch (relative_addr) {
446 case XMI_TYPE:
447 if (writeflag == MEM_READ) {
448 /*
449 * The first node is an XMI->BI adapter node, and then
450 * there are n CPU nodes.
451 */
452 odata = XMIDT_ISIS;
453 if (node_nr == 0)
454 odata = XMIDT_DWMBA;
455
456 debug("[ decxmi: (node %i) read from XMI_TYPE: "
457 "0x%08x ]\n", node_nr, (int)odata);
458 } else
459 debug("[ decxmi: (node %i) write to XMI_TYPE: "
460 "0x%08x ]\n", node_nr, (int)idata);
461 break;
462 case XMI_BUSERR:
463 if (writeflag == MEM_READ) {
464 odata = 0;
465 debug("[ decxmi: (node %i) read from XMI_BUSERR: "
466 "0x%08x ]\n", node_nr, (int)odata);
467 } else
468 debug("[ decxmi: (node %i) write to XMI_BUSERR: "
469 "0x%08x ]\n", node_nr, (int)idata);
470 break;
471 case XMI_FAIL:
472 if (writeflag == MEM_READ) {
473 odata = 0;
474 debug("[ decxmi: (node %i) read from XMI_FAIL: "
475 "0x%08x ]\n", node_nr, (int)odata);
476 } else
477 debug("[ decxmi: (node %i) write to XMI_FAIL: "
478 "0x%08x ]\n", node_nr, (int)idata);
479 break;
480 case 0xc:
481 if (writeflag == MEM_READ) {
482 odata = d->reg_0xc[node_nr];
483 debug("[ decxmi: (node %i) read from REG 0xC: "
484 "0x%08x ]\n", node_nr, (int)odata);
485 } else {
486 d->reg_0xc[node_nr] = idata;
487 debug("[ decxmi: (node %i) write to REG 0xC: "
488 "0x%08x ]\n", node_nr, (int)idata);
489 }
490 break;
491 default:
492 if (writeflag==MEM_READ) {
493 debug("[ decxmi: (node %i) read from unimplemented "
494 "0x%08lx ]\n", node_nr, (long)relative_addr,
495 (int)odata);
496 } else {
497 debug("[ decxmi: (node %i) write to unimplemented "
498 "0x%08lx: 0x%08x ]\n", node_nr,
499 (long)relative_addr, (int)idata);
500 }
501 }
502
503 if (writeflag == MEM_READ)
504 memory_writemax64(cpu, data, len, odata);
505
506 return 1;
507 }
508
509
510 /*
511 * dev_decxmi_init():
512 */
513 void dev_decxmi_init(struct memory *mem, uint64_t baseaddr)
514 {
515 struct decxmi_data *d;
516
517 d = malloc(sizeof(struct decxmi_data));
518 if (d == NULL) {
519 fprintf(stderr, "out of memory\n");
520 exit(1);
521 }
522 memset(d, 0, sizeof(struct decxmi_data));
523
524 memory_device_register(mem, "decxmi", baseaddr, DEV_DECXMI_LENGTH,
525 dev_decxmi_access, d, DM_DEFAULT, NULL);
526 }
527

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