/[gxemul]/trunk/src/device.c
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Revision 10 - (hide annotations)
Mon Oct 8 16:18:27 2007 UTC (12 years, 7 months ago) by dpavlin
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File size: 9097 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.815 2005/06/27 23:04:35 debug Exp $
20050617	Experimenting some more with netbooting OpenBSD/sgi. Adding
		a hack which allows emulated ethernet networks to be
		distributed across multiple emulator processes.
20050618	Minor updates (documentation, dummy YAMON emulation, etc).
20050620	strcpy/strcat -> strlcpy/strlcat updates.
		Some more progress on evbmips (Malta).
20050621	Adding a section to doc/configfiles.html about ethernet
		emulation across multiple hosts.
		Beginning the work on the ARM translation engine (using the
		dynamic-but-not-binary translation method).
		Fixing a bintrans bug: 0x9fc00000 should always be treated as
		PROM area, just as 0xbfc00000 is.
		Minor progress on Malta emulation (the PCI-ISA bus).
20050622	NetBSD/evbmips can now be installed (using another emulated
		machine) and run (including userland and so on). :-)
		Spliting up the bintrans haddr_entry field into two (one for
		read, one for write). Probably not much of a speed increase,
		though.
		Updating some NetBSD 2.0 -> 2.0.2 in the documentation.
20050623	Minor updates (documentation, the TODO file, etc).
		gzipped kernels are now always automagically gunzipped when
		loaded.
20050624	Adding a dummy Playstation Portable (PSP) mode, just barely
		enough to run Hello World (in weird colors :-).
		Removing the -b command line option; old bintrans is enabled
		by default instead. It makes more sense.
		Trying to finally fix the non-working performance measurement
		thing (instr/second etc).
20050625	Continuing on the essential basics for ARM emulation. Two
		instructions seem to work, a branch and a simple "mov". (The
		mov arguments are not correct yet.) Performance is definitely
		reasonable.
		Various other minor updates.
		Adding the ARM "bl" instruction.
		Adding support for combining multiple ARM instructions into one
		function call. ("mov" + "mov" is the only one implemented so
		far, but it seems to work.)
		Cleaning up some IP32 interrupt things (crime/mace); disabling
		the PS/2 keyboard controller on IP32, so that NetBSD/sgimips
		boots into userland again.
20050626	Finally! NetBSD/sgimips netboots. Adding instructions to
		doc/guestoses.html on how to set up an nfs server etc.
		Various other minor fixes.
		Playstation Portable ".pbp" files can now be used directly.
		(The ELF part of the .pbp is extracted transparently.)
		Converting some sprintf -> snprintf.
		Adding some more instructions to the ARM disassembler.
20050627	More ARM updates. Adding some simple ldr(b), str(b),
		cmps, and conditional branch instructions, enough to run
		a simple Hello World program.
		All ARM instructions are now inlined/generated for all possible
		condition codes.
		Adding add and sub, and more load/store instructions.
		Removing dummy files: cpu_alpha.c, cpu_hppa.c, and cpu_sparc.c.
		Some minor documentation updates; preparing for a 0.3.4
		release. Updating some URLs.

==============  RELEASE 0.3.4  ==============


1 dpavlin 2 /*
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 dpavlin 10 * $Id: device.c,v 1.14 2005/06/22 08:13:38 debug Exp $
29 dpavlin 2 *
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 "misc.h"
39    
40    
41     static struct device_entry *device_entries = NULL;
42     static int device_entries_sorted = 0;
43     static int n_device_entries = 0;
44     static int device_exit_on_error = 1;
45    
46    
47     /*
48     * device_entry_compar():
49     *
50     * Internal function, used by sort_entries().
51     */
52     static int device_entry_compar(const void *a, const void *b)
53     {
54     struct device_entry *pa = (struct device_entry *) a;
55     struct device_entry *pb = (struct device_entry *) b;
56    
57     return strcmp(pa->name, pb->name);
58     }
59    
60    
61     /*
62     * sort_entries():
63     *
64     * Internal function. Sorts the device_entries array in alphabetic order.
65     */
66     static void sort_entries(void)
67     {
68     qsort(device_entries, n_device_entries, sizeof(struct device_entry),
69     device_entry_compar);
70    
71     device_entries_sorted = 1;
72     }
73    
74    
75     /*
76     * device_register():
77     *
78     * Registers a device. The device is added to the end of the device_entries
79     * array, and the sorted flag is set to zero.
80     *
81     * NOTE: It would be a bad thing if two devices had the same name. However,
82     * that isn't checked here, it is up to the caller!
83     *
84     * Return value is 1 if the device was registered, 0 otherwise.
85     */
86     int device_register(char *name, int (*initf)(struct devinit *))
87     {
88     device_entries = realloc(device_entries, sizeof(struct device_entry)
89     * (n_device_entries + 1));
90     if (device_entries == NULL) {
91     fprintf(stderr, "device_register(): out of memory\n");
92     exit(1);
93     }
94    
95     memset(&device_entries[n_device_entries], 0,
96     sizeof(struct device_entry));
97    
98     device_entries[n_device_entries].name = strdup(name);
99     device_entries[n_device_entries].initf = initf;
100    
101     device_entries_sorted = 0;
102     n_device_entries ++;
103     return 1;
104     }
105    
106    
107     /*
108     * device_lookup():
109     *
110     * Lookup a device name by scanning the device_entries array (as a binary
111     * search tree).
112     *
113     * Return value is a pointer to the device_entry on success, or a NULL pointer
114     * if there was no such device.
115     */
116     struct device_entry *device_lookup(char *name)
117     {
118     int i, step, r, do_return = 0;
119    
120     if (name == NULL) {
121     fprintf(stderr, "device_lookup(): NULL ptr\n");
122     exit(1);
123     }
124    
125     if (!device_entries_sorted)
126     sort_entries();
127    
128     if (n_device_entries == 0)
129     return NULL;
130    
131     i = n_device_entries / 2;
132     step = i/2 + 1;
133    
134     for (;;) {
135     if (i < 0)
136     i = 0;
137     if (i >= n_device_entries)
138     i = n_device_entries - 1;
139    
140     /* printf("device_lookup(): i=%i step=%i\n", i, step);
141     printf(" name='%s', '%s'\n", name,
142     device_entries[i].name); */
143    
144     r = strcmp(name, device_entries[i].name);
145    
146     if (r < 0) {
147     /* Go left: */
148     i -= step;
149     if (step == 0)
150     i --;
151     } else if (r > 0) {
152     /* Go right: */
153     i += step;
154     if (step == 0)
155     i ++;
156     } else {
157     /* Found it! */
158     return &device_entries[i];
159     }
160    
161     if (do_return)
162     return NULL;
163    
164     if (step == 0)
165     do_return = 1;
166    
167 dpavlin 10 if (step & 1)
168     step = (step/2) + 1;
169     else
170     step /= 2;
171 dpavlin 2 }
172     }
173    
174    
175     /*
176     * device_unregister():
177     *
178     * Unregisters a device.
179     *
180     * Return value is 1 if a device was unregistered, 0 otherwise.
181     */
182     int device_unregister(char *name)
183     {
184     size_t i;
185     struct device_entry *p = device_lookup(name);
186    
187     if (p == NULL) {
188     fatal("device_unregister(): no such device (\"%s\")\n", name);
189     return 0;
190     }
191    
192     i = (size_t)p - (size_t)device_entries;
193     i /= sizeof(struct device_entry);
194    
195     free(device_entries[i].name);
196     device_entries[i].name = NULL;
197    
198     if (i == n_device_entries-1) {
199     /* Do nothing if we're removing the last array element. */
200     } else {
201     /* Remove array element i by copying the last element
202     to i's position: */
203     device_entries[i] = device_entries[n_device_entries-1];
204    
205     /* The array is not sorted anymore: */
206     device_entries_sorted = 0;
207     }
208    
209     n_device_entries --;
210    
211     /* TODO: realloc? */
212     return 1;
213     }
214    
215    
216     /*
217     * device_add():
218     *
219 dpavlin 10 * Add a device to a machine. For example: "kn210 addr=0x12340000" adds a
220     * device called "kn210" at a specific address.
221 dpavlin 2 *
222 dpavlin 10 * TODO: This function is quite ugly, and should be cleaned up.
223 dpavlin 2 */
224     void *device_add(struct machine *machine, char *name_and_params)
225     {
226     struct device_entry *p;
227     struct devinit devinit;
228     char *s2, *s3;
229     size_t len;
230    
231     memset(&devinit, 0, sizeof(struct devinit));
232     devinit.machine = machine;
233    
234     /* Default values: */
235     devinit.addr_mult = 1;
236    
237     /* Get the device name first: */
238     s2 = name_and_params;
239     while (s2[0] != ',' && s2[0] != ' ' && s2[0] != '\0')
240     s2 ++;
241    
242     len = (size_t)s2 - (size_t)name_and_params;
243     devinit.name = malloc(len + 1);
244     if (devinit.name == NULL) {
245     fprintf(stderr, "device_add(): out of memory\n");
246     exit(1);
247     }
248     memcpy(devinit.name, name_and_params, len);
249     devinit.name[len] = '\0';
250    
251     p = device_lookup(devinit.name);
252     if (p == NULL) {
253     fatal("no such device (\"%s\")\n", devinit.name);
254     if (device_exit_on_error)
255     exit(1);
256     else
257     goto return_fail;
258     }
259    
260     /* Get params from name_and_params: */
261     while (*s2 != '\0') {
262     /* Skip spaces, commas, and semicolons: */
263     while (*s2 == ' ' || *s2 == ',' || *s2 == ';')
264     s2 ++;
265    
266     if (*s2 == '\0')
267     break;
268    
269     /* s2 now points to the next param. eg "addr=1234" */
270    
271     /* Get a word (until there is a '=' sign): */
272     s3 = s2;
273     while (*s3 != '=' && *s3 != '\0')
274     s3 ++;
275     if (s3 == s2) {
276     fatal("weird param: %s\n", s2);
277     if (device_exit_on_error)
278     exit(1);
279     else
280     goto return_fail;
281     }
282     s3 ++;
283     /* s3 now points to the parameter value ("1234") */
284    
285     if (strncmp(s2, "addr=", 5) == 0) {
286     devinit.addr = mystrtoull(s3, NULL, 0);
287     } else if (strncmp(s2, "len=", 4) == 0) {
288     devinit.len = mystrtoull(s3, NULL, 0);
289     } else if (strncmp(s2, "addr_mult=", 10) == 0) {
290     devinit.addr_mult = mystrtoull(s3, NULL, 0);
291     } else if (strncmp(s2, "irq=", 4) == 0) {
292     devinit.irq_nr = mystrtoull(s3, NULL, 0);
293     } else {
294     fatal("unknown param: %s\n", s2);
295     if (device_exit_on_error)
296     exit(1);
297     else
298     goto return_fail;
299     }
300    
301     /* skip to the next param: */
302     s2 = s3;
303     while (*s2 != '\0' && *s2 != ' ' && *s2 != ',' && *s2 != ';')
304     s2 ++;
305     }
306    
307    
308     /*
309     * Call the init function for this device:
310     */
311    
312     devinit.return_ptr = NULL;
313    
314     if (!p->initf(&devinit)) {
315     fatal("error adding device (\"%s\")\n", name_and_params);
316     if (device_exit_on_error)
317     exit(1);
318     else
319     goto return_fail;
320     }
321    
322     free(devinit.name);
323     return devinit.return_ptr;
324    
325     return_fail:
326     free(devinit.name);
327     return NULL;
328     }
329    
330    
331     /*
332     * device_dumplist():
333     *
334     * Dump a list of all registered devices. (If the list is not sorted when
335     * this function is called, it is implicitly sorted.)
336     */
337     void device_dumplist(void)
338     {
339     int i;
340    
341     if (!device_entries_sorted)
342     sort_entries();
343    
344     for (i=0; i<n_device_entries; i++) {
345     debug(" %s", device_entries[i].name);
346    
347     /* TODO: flags? */
348    
349     debug("\n");
350     }
351     }
352    
353    
354     /*
355     * device_set_exit_on_error():
356 dpavlin 10 *
357     * This function selects the behaviour of the emulator when a device is not
358     * found. During startup, it is nicest to abort the whole emulator session,
359     * but if a device addition is attempted from within the debugger, then it is
360     * nicer to just print a warning and continue.
361 dpavlin 2 */
362     void device_set_exit_on_error(int exit_on_error)
363     {
364     device_exit_on_error = exit_on_error;
365     }
366    
367    
368     /*
369     * device_init():
370     *
371     * Initialize the device registry, and call autodev_init() to automatically
372 dpavlin 10 * add all normal devices (from the src/devices/ directory).
373 dpavlin 2 *
374     * This function should be called before any other device_*() function is used.
375     */
376     void device_init(void)
377     {
378     device_entries = NULL;
379     device_entries_sorted = 0;
380     n_device_entries = 0;
381    
382     autodev_init();
383     }
384    

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