Update devo version of m32r sim to build with recent sim/common changes.
[external/binutils.git] / sim / common / sim-core.c
1 /*  This file is part of the program psim.
2
3     Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
4
5     This program is free software; you can redistribute it and/or modify
6     it under the terms of the GNU General Public License as published by
7     the Free Software Foundation; either version 2 of the License, or
8     (at your option) any later version.
9
10     This program is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13     GNU General Public License for more details.
14  
15     You should have received a copy of the GNU General Public License
16     along with this program; if not, write to the Free Software
17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18  
19     */
20
21
22 #ifndef _SIM_CORE_C_
23 #define _SIM_CORE_C_
24
25 #include "sim-main.h"
26 #include "sim-assert.h"
27
28
29 /* "core" module install handler.
30    This is called via sim_module_install to install the "core" subsystem
31    into the simulator.  */
32
33 EXTERN_SIM_CORE\
34 (SIM_RC)
35 sim_core_install (SIM_DESC sd)
36 {
37   sim_module_add_uninstall_fn (sd, sim_core_uninstall);
38   sim_module_add_init_fn (sd, sim_core_init);
39   return SIM_RC_OK;
40 }
41
42
43 /* Uninstall the "core" subsystem from the simulator.  */
44
45 EXTERN_SIM_CORE\
46 (void)
47 sim_core_uninstall (SIM_DESC sd)
48 {
49   /* FIXME: free buffers, etc. */
50 }
51
52
53 EXTERN_SIM_CORE\
54 (SIM_RC)
55 sim_core_init (SIM_DESC sd)
56 {
57   sim_core *memory = STATE_CORE(sd);
58   sim_core_maps map;
59   for (map = 0;
60        map < nr_sim_core_maps;
61        map++) {
62     /* blow away old mappings */
63     sim_core_mapping *curr = memory->map[map].first;
64     while (curr != NULL) {
65       sim_core_mapping *tbd = curr;
66       curr = curr->next;
67       if (tbd->free_buffer) {
68         SIM_ASSERT(tbd->buffer != NULL);
69         zfree(tbd->buffer);
70       }
71       zfree(tbd);
72     }
73     memory->map[map].first = NULL;
74   }
75   return SIM_RC_OK;
76 }
77
78
79
80 STATIC_INLINE_SIM_CORE\
81 (const char *)
82 sim_core_map_to_str (sim_core_maps map)
83 {
84   switch (map)
85     {
86     case sim_core_read_map: return "read";
87     case sim_core_write_map: return "write";
88     case sim_core_execute_map: return "exec";
89     default: return "(invalid-map)";
90     }
91 }
92
93
94 STATIC_INLINE_SIM_CORE\
95 (sim_core_mapping *)
96 new_sim_core_mapping(SIM_DESC sd,
97                  attach_type attach,
98                  int space,
99                  unsigned_word addr,
100                  unsigned nr_bytes,
101                  device *device,
102                  void *buffer,
103                  int free_buffer)
104 {
105   sim_core_mapping *new_mapping = ZALLOC(sim_core_mapping);
106   /* common */
107   new_mapping->level = attach;
108   new_mapping->space = space;
109   new_mapping->base = addr;
110   new_mapping->nr_bytes = nr_bytes;
111   new_mapping->bound = addr + (nr_bytes - 1);
112   if (attach == attach_raw_memory) {
113     new_mapping->buffer = buffer;
114     new_mapping->free_buffer = free_buffer;
115   }
116   else if (attach >= attach_callback) {
117     new_mapping->device = device;
118   }
119   else {
120     sim_io_error (sd, "new_sim_core_mapping - internal error - unknown attach type %d\n",
121                  attach);
122   }
123   return new_mapping;
124 }
125
126
127 STATIC_INLINE_SIM_CORE\
128 (void)
129 sim_core_map_attach(SIM_DESC sd,
130                 sim_core_map *access_map,
131                 attach_type attach,
132                 int space,
133                 unsigned_word addr,
134                 unsigned nr_bytes, /* host limited */
135                 device *client, /*callback/default*/
136                 void *buffer, /*raw_memory*/
137                 int free_buffer) /*raw_memory*/
138 {
139   /* find the insertion point for this additional mapping and then
140      insert */
141   sim_core_mapping *next_mapping;
142   sim_core_mapping **last_mapping;
143
144   SIM_ASSERT((attach >= attach_callback && client != NULL && buffer == NULL && !free_buffer)
145          || (attach == attach_raw_memory && client == NULL && buffer != NULL));
146
147   /* actually do occasionally get a zero size map */
148   if (nr_bytes == 0) {
149 #if (WITH_DEVICES)
150     device_error(client, "called on sim_core_map_attach with size zero");
151 #else
152     sim_io_error (sd, "called on sim_core_map_attach with size zero");
153 #endif
154   }
155
156   /* find the insertion point (between last/next) */
157   next_mapping = access_map->first;
158   last_mapping = &access_map->first;
159   while(next_mapping != NULL
160         && (next_mapping->level < attach
161             || (next_mapping->level == attach
162                 && next_mapping->bound < addr))) {
163     /* provided levels are the same */
164     /* assert: next_mapping->base > all bases before next_mapping */
165     /* assert: next_mapping->bound >= all bounds before next_mapping */
166     last_mapping = &next_mapping->next;
167     next_mapping = next_mapping->next;
168   }
169
170   /* check insertion point correct */
171   SIM_ASSERT(next_mapping == NULL || next_mapping->level >= attach);
172   if (next_mapping != NULL && next_mapping->level == attach
173       && next_mapping->base < (addr + (nr_bytes - 1))) {
174 #if (WITH_DEVICES)
175     device_error(client, "map overlap when attaching %d:0x%lx (%ld)",
176                  space, (long)addr, (long)nr_bytes);
177 #else
178     sim_io_error (sd, "map overlap when attaching %d:0x%lx (%ld)",
179                  space, (long)addr, (long)nr_bytes);
180 #endif
181   }
182
183   /* create/insert the new mapping */
184   *last_mapping = new_sim_core_mapping(sd,
185                                    attach,
186                                    space, addr, nr_bytes,
187                                    client, buffer, free_buffer);
188   (*last_mapping)->next = next_mapping;
189 }
190
191
192 INLINE_SIM_CORE\
193 (void)
194 sim_core_attach(SIM_DESC sd,
195             attach_type attach,
196             access_type access,
197             int space,
198             unsigned_word addr,
199             unsigned nr_bytes, /* host limited */
200             device *client,
201             void *optional_buffer)
202 {
203   sim_core *memory = STATE_CORE(sd);
204   sim_core_maps map;
205   void *buffer;
206   int buffer_freed;
207   if ((access & access_read_write_exec) == 0
208       || (access & ~access_read_write_exec) != 0) {
209 #if (WITH_DEVICES)
210     device_error(client, "invalid access for core attach");
211 #else
212     sim_io_error (sd, "invalid access for core attach");
213 #endif
214   }
215   /* verify the attach type */
216   if (attach == attach_raw_memory) {
217     if (optional_buffer == NULL) {
218       buffer = zalloc(nr_bytes);
219       buffer_freed = 0;
220     }
221     else {
222       buffer = optional_buffer;
223       buffer_freed = 1;
224     }
225   }
226   else if (attach >= attach_callback) {
227     buffer = NULL;
228     buffer_freed = 1;
229   }
230   else {
231 #if (WITH_DEVICES)
232     device_error(client, "sim_core_attach - conflicting buffer and attach arguments");
233 #else
234     sim_io_error (sd, "sim_core_attach - conflicting buffer and attach arguments");
235 #endif
236     buffer = NULL;
237     buffer_freed = 1;
238   }
239   /* attach the region to all applicable access maps */
240   for (map = 0; 
241        map < nr_sim_core_maps;
242        map++) {
243     switch (map) {
244     case sim_core_read_map:
245       if (access & access_read)
246         sim_core_map_attach(sd, &memory->map[map],
247                         attach,
248                         space, addr, nr_bytes,
249                         client, buffer, !buffer_freed);
250       buffer_freed ++;
251       break;
252     case sim_core_write_map:
253       if (access & access_write)
254         sim_core_map_attach(sd, &memory->map[map],
255                         attach,
256                         space, addr, nr_bytes,
257                         client, buffer, !buffer_freed);
258       buffer_freed ++;
259       break;
260     case sim_core_execute_map:
261       if (access & access_exec)
262         sim_core_map_attach(sd, &memory->map[map],
263                         attach,
264                         space, addr, nr_bytes,
265                         client, buffer, !buffer_freed);
266       buffer_freed ++;
267       break;
268     case nr_sim_core_maps:
269       sim_io_error (sd, "sim_core_attach - internal error - bad switch");
270       break;
271     }
272   }
273 }
274
275
276 STATIC_INLINE_SIM_CORE\
277 (sim_core_mapping *)
278 sim_core_find_mapping(SIM_DESC sd,
279                       sim_core_maps map,
280                       unsigned_word addr,
281                       unsigned nr_bytes,
282                       int abort, /*either 0 or 1 - helps inline */
283                       sim_cpu *cpu,
284                       sim_cia cia)
285 {
286   sim_core_mapping *mapping = STATE_CORE (sd)->map[map].first;
287   SIM_ASSERT((addr & (nr_bytes - 1)) == 0); /* must be aligned */
288   SIM_ASSERT((addr + (nr_bytes - 1)) >= addr); /* must not wrap */
289   while (mapping != NULL) {
290     if (addr >= mapping->base
291         && (addr + (nr_bytes - 1)) <= mapping->bound)
292       return mapping;
293     mapping = mapping->next;
294   }
295   if (abort)
296     sim_io_error (sd, "access to unmaped address 0x%lx (%d bytes)\n",
297                   (unsigned long) addr, nr_bytes);
298   return NULL;
299 }
300
301
302 STATIC_INLINE_SIM_CORE\
303 (void *)
304 sim_core_translate(sim_core_mapping *mapping,
305                unsigned_word addr)
306 {
307   return (void *)(((char *)mapping->buffer) + addr - mapping->base);
308 }
309
310
311 INLINE_SIM_CORE\
312 (unsigned)
313 sim_core_read_buffer(SIM_DESC sd,
314                      sim_core_maps map,
315                      void *buffer,
316                      unsigned_word addr,
317                      unsigned len)
318 {
319   unsigned count = 0;
320   while (count < len) {
321     unsigned_word raddr = addr + count;
322     sim_core_mapping *mapping =
323       sim_core_find_mapping(sd, map,
324                             raddr, 1,
325                             0, NULL, NULL_CIA); /*dont-abort*/
326     if (mapping == NULL)
327       break;
328 #if (WITH_DEVICES)
329     if (mapping->device != NULL) {
330       int nr_bytes = len - count;
331       if (raddr + nr_bytes - 1> mapping->bound)
332         nr_bytes = mapping->bound - raddr + 1;
333       if (device_io_read_buffer(mapping->device,
334                                 (unsigned_1*)buffer + count,
335                                 mapping->space,
336                                 raddr,
337                                 nr_bytes) != nr_bytes)
338         break;
339       count += nr_bytes;
340     }
341     else
342 #endif
343       {
344         ((unsigned_1*)buffer)[count] =
345           *(unsigned_1*)sim_core_translate(mapping, raddr);
346         count += 1;
347       }
348   }
349   return count;
350 }
351
352
353 INLINE_SIM_CORE\
354 (unsigned)
355 sim_core_write_buffer(SIM_DESC sd,
356                       sim_core_maps map,
357                       const void *buffer,
358                       unsigned_word addr,
359                       unsigned len)
360 {
361   unsigned count = 0;
362   while (count < len) {
363     unsigned_word raddr = addr + count;
364     sim_core_mapping *mapping = sim_core_find_mapping(sd, map,
365                                                       raddr, 1,
366                                                       0, NULL, NULL_CIA); /*dont-abort*/
367     if (mapping == NULL)
368       break;
369 #if (WITH_DEVICES)
370     if (WITH_CALLBACK_MEMORY
371         && mapping->device != NULL) {
372       int nr_bytes = len - count;
373       if (raddr + nr_bytes - 1 > mapping->bound)
374         nr_bytes = mapping->bound - raddr + 1;
375       if (device_io_write_buffer(mapping->device,
376                                  (unsigned_1*)buffer + count,
377                                  mapping->space,
378                                  raddr,
379                                  nr_bytes) != nr_bytes)
380         break;
381       count += nr_bytes;
382     }
383     else
384 #endif
385       {
386         *(unsigned_1*)sim_core_translate(mapping, raddr) =
387           ((unsigned_1*)buffer)[count];
388         count += 1;
389       }
390   }
391   return count;
392 }
393
394
395 /* define the read/write 1/2/4/8/word functions */
396
397 #define N 1
398 #include "sim-n-core.h"
399 #undef N
400
401 #define N 2
402 #include "sim-n-core.h"
403 #undef N
404
405 #define N 4
406 #include "sim-n-core.h"
407 #undef N
408
409 #define N 8
410 #include "sim-n-core.h"
411 #undef N
412
413 #define N word
414 #include "sim-n-core.h"
415 #undef N
416
417 #endif