/[gxemul]/trunk/src/device.c
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Contents of /trunk/src/device.c

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Revision 22 - (show annotations)
Mon Oct 8 16:19:37 2007 UTC (13 years, 1 month ago) by dpavlin
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File size: 11370 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1121 2006/02/18 21:03:08 debug Exp $
20051126	Cobalt and PReP now work with the 21143 NIC.
		Continuing on Alpha dyntrans things.
		Fixing some more left-shift-by-24 to unsigned.
20051127	Working on OpenFirmware emulation; major cleanup/redesign.
		Progress on MacPPC emulation: NetBSD detects two CPUs (when
		running with -n 2), framebuffer output (for text) works.
		Adding quick-hack Bandit PCI controller and "gc" interrupt
		controller for MacPPC.
20051128	Changing from a Bandit to a Uni-North controller for macppc.
		Continuing on OpenFirmware and MacPPC emulation in general
		(obio controller, and wdc attached to the obio seems to work).
20051129	More work on MacPPC emulation (adding a dummy ADB controller).
		Continuing the PCI bus cleanup (endianness and tag composition)
		and rewriting all PCI controllers' access functions.
20051130	Various minor PPC dyntrans optimizations.
		Manually inlining some parts of the framebuffer redraw routine.
		Slowly beginning the conversion of the old MIPS emulation into
		dyntrans (but this will take quite some time to get right).
		Generalizing quick_pc_to_pointers.
20051201	Documentation update (David Muse has made available a kernel
		which simplifies Debian/DECstation installation).
		Continuing on the ADB bus controller.
20051202	Beginning a rewrite of the Zilog serial controller (dev_zs).
20051203	Continuing on the zs rewrite (now called dev_z8530); conversion
		to devinit style.
		Reworking some of the input-only vs output-only vs input-output
		details of src/console.c, better warning messages, and adding
		a debug dump.
		Removing the concept of "device state"; it wasn't really used.
		Changing some debug output (-vv should now be used to show all
		details about devices and busses; not shown during normal
		startup anymore).
		Beginning on some SPARC instruction disassembly support.
20051204	Minor PPC updates (WALNUT skeleton stuff).
		Continuing on the MIPS dyntrans rewrite.
		More progress on the ADB controller (a keyboard is "detected"
		by NetBSD and OpenBSD).
		Downgrading OpenBSD/arc as a guest OS from "working" to
		"almost working" in the documentation.
		Progress on Algor emulation ("v3" PCI controller).
20051205	Minor updates.
20051207	Sorting devices according to address; this reduces complexity
		of device lookups from O(n) to O(log n) in memory_rw (but no
		real performance increase (yet) in experiments).
20051210	Beginning the work on native dyntrans backends (by making a
		simple skeleton; so far only for Alpha hosts).
20051211	Some very minor SPARC updates.
20051215	Fixing a bug in the MIPS mul (note: not mult) instruction,
		so it also works with non-64-bit emulation. (Thanks to Alec
		Voropay for noticing the problem.)
20051216	More work on the fake/empty/simple/skeleton/whatever backend;
		performance doesn't increase, so this isn't really worth it,
		but it was probably worth it to prepare for a real backend
		later.
20051219	More instr call statistics gathering and analysis stuff.
20051220	Another fix for MIPS 'mul'. Also converting mul and {d,}cl{o,z}
		to dyntrans.
		memory_ppc.c syntax error fix (noticed by Peter Valchev).
		Beginning to move out machines from src/machine.c into
		individual files in src/machines (in a way similar to the
		autodev system for devices).
20051222	Updating the documentation regarding NetBSD/pmax 3.0.
20051223	- " - NetBSD/cats 3.0.
20051225	- " - NetBSD/hpcmips 3.0.
20051226	Continuing on the machine registry redesign.
		Adding support for ARM rrx (33-bit rotate).
		Fixing some signed/unsigned issues (exposed by gcc -W).
20051227	Fixing the bug which prevented a NetBSD/prep 3.0 install kernel
		from starting (triggered when an mtmsr was the last instruction
		on a page). Unfortunately not enough to get the kernel to run
		as well as the 2.1 kernels did.
20051230	Some dyntrans refactoring.
20051231	Continuing on the machine registry redesign.
20060101-10	Continuing... moving more machines. Moving MD interrupt stuff
		from machine.c into a new src/machines/interrupts.c.
20060114	Adding various mvmeppc machine skeletons.
20060115	Continuing on mvme* stuff. NetBSD/mvmeppc prints boot messages
		(for MVME1600) and reaches the root device prompt, but no
		specific hardware devices are emulated yet.
20060116	Minor updates to the mvme1600 emulation mode; the Eagle PCI bus
		seems to work without much modification, and a 21143 can be
		detected, interrupts might work (but untested so far).
		Adding a fake MK48Txx (mkclock) device, for NetBSD/mvmeppc.
20060121	Adding an aux control register for ARM. (A BIG thank you to
		Olivier Houchard for tracking down this bug.)
20060122	Adding more ARM instructions (smulXY), and dev_iq80321_7seg.
20060124	Adding disassembly of more ARM instructions (mia*, mra/mar),
		and some semi-bogus XScale and i80321 registers.
20060201-02	Various minor updates. Moving the last machines out of
		machine.c.
20060204	Adding a -c command line option, for running debugger commands
		before the simulation starts, but after all files have been
		loaded.
		Minor iq80321-related updates.
20060209	Minor hacks (DEVINIT macro, etc).
		Preparing for the generalization of the 64-bit dyntrans address
		translation subsystem.
20060216	Adding ARM ldrd (double-register load).
20060217	Continuing on various ARM-related stuff.
20060218	More progress on the ATA/wdc emulation for NetBSD/iq80321.
		NetBSD/evbarm can now be installed :-)  Updating the docs, etc.
		Continuing on Algor emulation.

==============  RELEASE 0.3.8  ==============


1 /*
2 * Copyright (C) 2005-2006 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: device.c,v 1.25 2006/02/18 21:03:11 debug Exp $
29 *
30 * Device registry framework.
31 */
32
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36
37 #include "device.h"
38 #include "memory.h"
39 #include "misc.h"
40
41
42 static struct device_entry *device_entries = NULL;
43 static int device_entries_sorted = 0;
44 static int n_device_entries = 0;
45 static int device_exit_on_error = 1;
46
47 static struct pci_entry *pci_entries = NULL;
48 static int n_pci_entries = 0;
49
50
51 /*
52 * device_entry_compar():
53 *
54 * Internal function, used by sort_entries().
55 */
56 static int device_entry_compar(const void *a, const void *b)
57 {
58 struct device_entry *pa = (struct device_entry *) a;
59 struct device_entry *pb = (struct device_entry *) b;
60
61 return strcmp(pa->name, pb->name);
62 }
63
64
65 /*
66 * sort_entries():
67 *
68 * Internal function. Sorts the device_entries array in alphabetic order.
69 */
70 static void sort_entries(void)
71 {
72 qsort(device_entries, n_device_entries, sizeof(struct device_entry),
73 device_entry_compar);
74
75 device_entries_sorted = 1;
76 }
77
78
79 /*
80 * device_register():
81 *
82 * Registers a device. The device is added to the end of the device_entries
83 * array, and the sorted flag is set to zero.
84 *
85 * NOTE: It would be a bad thing if two devices had the same name. However,
86 * that isn't checked here, it is up to the caller!
87 *
88 * Return value is 1 if the device was registered, 0 otherwise.
89 */
90 int device_register(char *name, int (*initf)(struct devinit *))
91 {
92 device_entries = realloc(device_entries, sizeof(struct device_entry)
93 * (n_device_entries + 1));
94 if (device_entries == NULL) {
95 fprintf(stderr, "device_register(): out of memory\n");
96 exit(1);
97 }
98
99 memset(&device_entries[n_device_entries], 0,
100 sizeof(struct device_entry));
101
102 device_entries[n_device_entries].name = strdup(name);
103 device_entries[n_device_entries].initf = initf;
104
105 device_entries_sorted = 0;
106 n_device_entries ++;
107 return 1;
108 }
109
110
111 /*
112 * pci_register():
113 *
114 * Registers a pci device. The pci device is added to the pci_entries array.
115 *
116 * Return value is 1 if the pci device was registered. If it was not
117 * added, this function does not return.
118 */
119 int pci_register(char *name, void (*initf)(struct machine *, struct memory *,
120 struct pci_device *))
121 {
122 pci_entries = realloc(pci_entries, sizeof(struct pci_entry)
123 * (n_pci_entries + 1));
124 if (pci_entries == NULL) {
125 fprintf(stderr, "pci_register(): out of memory\n");
126 exit(1);
127 }
128
129 memset(&pci_entries[n_pci_entries], 0, sizeof(struct pci_entry));
130
131 pci_entries[n_pci_entries].name = strdup(name);
132 pci_entries[n_pci_entries].initf = initf;
133 n_pci_entries ++;
134 return 1;
135 }
136
137
138 /*
139 * pci_lookup_initf():
140 *
141 * Find a pci device init function by scanning the pci_entries array.
142 *
143 * Return value is a function pointer, or NULL if the name was not found.
144 */
145 void (*pci_lookup_initf(const char *name))(struct machine *machine,
146 struct memory *mem, struct pci_device *pd)
147 {
148 int i;
149
150 if (name == NULL) {
151 fprintf(stderr, "pci_lookup_initf(): name = NULL\n");
152 exit(1);
153 }
154
155 for (i=0; i<n_pci_entries; i++)
156 if (strcmp(name, pci_entries[i].name) == 0)
157 return pci_entries[i].initf;
158 return NULL;
159 }
160
161
162 /*
163 * device_lookup():
164 *
165 * Lookup a device name by scanning the device_entries array (as a binary
166 * search tree).
167 *
168 * Return value is a pointer to the device_entry on success, or a NULL pointer
169 * if there was no such device.
170 */
171 struct device_entry *device_lookup(char *name)
172 {
173 int hi, lo;
174
175 if (name == NULL) {
176 fprintf(stderr, "device_lookup(): NULL ptr\n");
177 exit(1);
178 }
179
180 if (!device_entries_sorted)
181 sort_entries();
182
183 if (n_device_entries == 0)
184 return NULL;
185
186 lo = 0; hi = n_device_entries - 1;
187
188 while (lo <= hi) {
189 int r, i = (lo + hi) / 2;
190
191 /* printf("device_lookup(): i=%i (lo=%i hi=%i)\n", i, lo, hi);
192 printf(" name='%s', '%s'\n", name,
193 device_entries[i].name); */
194
195 r = strcmp(name, device_entries[i].name);
196 if (r == 0) {
197 /* Found it! */
198 return &device_entries[i];
199 }
200
201 /* Try left or right half: */
202 if (r < 0)
203 hi = i - 1;
204 if (r > 0)
205 lo = i + 1;
206 }
207
208 return NULL;
209 }
210
211
212 /*
213 * device_unregister():
214 *
215 * Unregisters a device.
216 *
217 * Return value is 1 if a device was unregistered, 0 otherwise.
218 */
219 int device_unregister(char *name)
220 {
221 ssize_t i;
222 struct device_entry *p = device_lookup(name);
223
224 if (p == NULL) {
225 fatal("device_unregister(): no such device (\"%s\")\n", name);
226 return 0;
227 }
228
229 i = (size_t)p - (size_t)device_entries;
230 i /= sizeof(struct device_entry);
231
232 free(device_entries[i].name);
233 device_entries[i].name = NULL;
234
235 if (i == n_device_entries-1) {
236 /* Do nothing if we're removing the last array element. */
237 } else {
238 /* Remove array element i by copying the last element
239 to i's position: */
240 device_entries[i] = device_entries[n_device_entries-1];
241
242 /* The array is not sorted anymore: */
243 device_entries_sorted = 0;
244 }
245
246 n_device_entries --;
247
248 /* TODO: realloc? */
249 return 1;
250 }
251
252
253 /*
254 * device_add():
255 *
256 * Add a device to a machine. For example: "kn210 addr=0x12340000" adds a
257 * device called "kn210" at a specific address.
258 *
259 * TODO: This function is quite ugly, and should be cleaned up.
260 */
261 void *device_add(struct machine *machine, char *name_and_params)
262 {
263 struct device_entry *p;
264 struct devinit devinit;
265 char *s2, *s3;
266 size_t len;
267 int quoted;
268
269 memset(&devinit, 0, sizeof(struct devinit));
270 devinit.machine = machine;
271
272 /* Default values: */
273 devinit.addr_mult = 1;
274 devinit.in_use = 1;
275
276 /* Get the device name first: */
277 s2 = name_and_params;
278 while (s2[0] != ',' && s2[0] != ' ' && s2[0] != '\0')
279 s2 ++;
280
281 len = (size_t)s2 - (size_t)name_and_params;
282 devinit.name = malloc(len + 1);
283 if (devinit.name == NULL) {
284 fprintf(stderr, "device_add(): out of memory\n");
285 exit(1);
286 }
287 memcpy(devinit.name, name_and_params, len);
288 devinit.name[len] = '\0';
289 devinit.dma_irq_nr = -1;
290
291 p = device_lookup(devinit.name);
292 if (p == NULL) {
293 fatal("no such device (\"%s\")\n", devinit.name);
294 if (device_exit_on_error)
295 exit(1);
296 else
297 goto return_fail;
298 }
299
300 /* Get params from name_and_params: */
301 while (*s2 != '\0') {
302 /* Skip spaces, commas, and semicolons: */
303 while (*s2 == ' ' || *s2 == ',' || *s2 == ';')
304 s2 ++;
305
306 if (*s2 == '\0')
307 break;
308
309 /* s2 now points to the next param. eg "addr=1234" */
310
311 /* Get a word (until there is a '=' sign): */
312 s3 = s2;
313 while (*s3 != '=' && *s3 != '\0')
314 s3 ++;
315 if (s3 == s2) {
316 fatal("weird param: %s\n", s2);
317 if (device_exit_on_error)
318 exit(1);
319 else
320 goto return_fail;
321 }
322 s3 ++;
323 /* s3 now points to the parameter value ("1234") */
324
325 if (strncmp(s2, "addr=", 5) == 0) {
326 devinit.addr = mystrtoull(s3, NULL, 0);
327 } else if (strncmp(s2, "addr2=", 6) == 0) {
328 devinit.addr2 = mystrtoull(s3, NULL, 0);
329 } else if (strncmp(s2, "len=", 4) == 0) {
330 devinit.len = mystrtoull(s3, NULL, 0);
331 } else if (strncmp(s2, "addr_mult=", 10) == 0) {
332 devinit.addr_mult = mystrtoull(s3, NULL, 0);
333 } else if (strncmp(s2, "pci_little_endian=", 18) == 0) {
334 devinit.pci_little_endian = mystrtoull(s3, NULL, 0);
335 switch (devinit.pci_little_endian) {
336 case 0: break;
337 case 1: devinit.pci_little_endian =
338 MEM_PCI_LITTLE_ENDIAN;
339 break;
340 default:fatal("Bad pci_little_endian value.\n");
341 exit(1);
342 }
343 } else if (strncmp(s2, "irq=", 4) == 0) {
344 devinit.irq_nr = mystrtoull(s3, NULL, 0);
345 } else if (strncmp(s2, "dma_irq=", 8) == 0) {
346 devinit.dma_irq_nr = mystrtoull(s3, NULL, 0);
347 } else if (strncmp(s2, "in_use=", 7) == 0) {
348 devinit.in_use = mystrtoull(s3, NULL, 0);
349 } else if (strncmp(s2, "name2=", 6) == 0) {
350 char *h = s2 + 6;
351 size_t len = 0;
352 quoted = 0;
353 while (*h) {
354 if (*h == '\'')
355 quoted = !quoted;
356 h++, len++;
357 if (!quoted && *h == ' ')
358 break;
359 }
360 devinit.name2 = malloc(len + 1);
361 if (devinit.name2 == NULL) {
362 fprintf(stderr, "out of memory\n");
363 exit(1);
364 }
365 h = s2 + 6;
366 if (*h == '\'')
367 len -= 2, h++;
368 snprintf(devinit.name2, len + 1, h);
369 } else {
370 fatal("unknown param: %s\n", s2);
371 if (device_exit_on_error)
372 exit(1);
373 else
374 goto return_fail;
375 }
376
377 /* skip to the next param: */
378 s2 = s3;
379 quoted = 0;
380 while (*s2 != '\0' && (*s2 != ' ' || quoted) &&
381 *s2 != ',' && *s2 != ';') {
382 if (*s2 == '\'')
383 quoted = !quoted;
384 s2 ++;
385 }
386 }
387
388
389 /*
390 * Call the init function for this device:
391 */
392
393 devinit.return_ptr = NULL;
394
395 if (!p->initf(&devinit)) {
396 fatal("error adding device (\"%s\")\n", name_and_params);
397 if (device_exit_on_error)
398 exit(1);
399 else
400 goto return_fail;
401 }
402
403 free(devinit.name);
404 return devinit.return_ptr;
405
406 return_fail:
407 free(devinit.name);
408 return NULL;
409 }
410
411
412 /*
413 * device_dumplist():
414 *
415 * Dump a list of all registered devices. (If the list is not sorted when
416 * this function is called, it is implicitly sorted.)
417 */
418 void device_dumplist(void)
419 {
420 int i;
421
422 if (!device_entries_sorted)
423 sort_entries();
424
425 for (i=0; i<n_device_entries; i++) {
426 debug(" %s", device_entries[i].name);
427
428 /* TODO: flags? */
429
430 debug("\n");
431 }
432 }
433
434
435 /*
436 * device_set_exit_on_error():
437 *
438 * This function selects the behaviour of the emulator when a device is not
439 * found. During startup, it is nicest to abort the whole emulator session,
440 * but if a device addition is attempted from within the debugger, then it is
441 * nicer to just print a warning and continue.
442 */
443 void device_set_exit_on_error(int exit_on_error)
444 {
445 device_exit_on_error = exit_on_error;
446 }
447
448
449 /*
450 * device_init():
451 *
452 * Initialize the device registry, and call autodev_init() to automatically
453 * add all normal devices (from the src/devices/ directory).
454 *
455 * This function should be called before any other device_*() function is used.
456 */
457 void device_init(void)
458 {
459 device_entries = NULL;
460 device_entries_sorted = 0;
461 n_device_entries = 0;
462
463 autodev_init();
464 }
465

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