1 /* This file is part of the program psim.
3 Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
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.
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.
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.
26 #include "sim-assert.h"
30 /* for Windows builds. signal numbers used by MSVC are mostly
31 the same as non-linux unixen. */
37 /* "core" module install handler.
39 This is called via sim_module_install to install the "core" subsystem
40 into the simulator. */
42 static MODULE_INIT_FN sim_core_init;
43 static MODULE_UNINSTALL_FN sim_core_uninstall;
47 sim_core_install (SIM_DESC sd)
49 SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
51 /* establish the other handlers */
52 sim_module_add_uninstall_fn (sd, sim_core_uninstall);
53 sim_module_add_init_fn (sd, sim_core_init);
55 /* establish any initial data structures - none */
60 /* Uninstall the "core" subsystem from the simulator. */
64 sim_core_uninstall (SIM_DESC sd)
66 sim_core *core = STATE_CORE(sd);
68 /* blow away any mappings */
69 for (map = 0; map < nr_sim_core_maps; map++) {
70 sim_core_mapping *curr = core->common.map[map].first;
71 while (curr != NULL) {
72 sim_core_mapping *tbd = curr;
74 if (tbd->free_buffer != NULL) {
75 SIM_ASSERT(tbd->buffer != NULL);
76 zfree(tbd->free_buffer);
80 core->common.map[map].first = NULL;
87 sim_core_init (SIM_DESC sd)
95 #ifndef SIM_CORE_SIGNAL
96 #define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
97 sim_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), (TRANSFER), (ERROR))
101 sim_core_signal (SIM_DESC sd,
107 transfer_type transfer,
108 sim_core_signals sig)
110 const char *copy = (transfer == read_transfer ? "read" : "write");
113 case sim_core_unmapped_signal:
114 sim_io_eprintf (sd, "core: %d byte %s to unmaped address 0x%lx\n",
115 nr_bytes, copy, (unsigned long) addr);
116 sim_engine_halt (sd, cpu, NULL, cia, sim_signalled, SIGSEGV);
118 case sim_core_unaligned_signal:
119 sim_io_eprintf (sd, "core: %d byte misaligned %s to address 0x%lx",
120 nr_bytes, copy, (unsigned long) addr);
121 sim_engine_halt (sd, cpu, NULL, cia, sim_signalled, SIGBUS);
124 sim_engine_abort (sd, cpu, cia,
125 "sim_core_signal - internal error - bad switch");
131 STATIC_INLINE_SIM_CORE\
133 sim_core_map_to_str (sim_core_maps map)
137 case sim_core_read_map: return "read";
138 case sim_core_write_map: return "write";
139 case sim_core_execute_map: return "exec";
140 default: return "(invalid-map)";
147 new_sim_core_mapping (SIM_DESC sd,
151 address_word nr_bytes,
157 sim_core_mapping *new_mapping = ZALLOC(sim_core_mapping);
159 new_mapping->level = attach;
160 new_mapping->space = space;
161 new_mapping->base = addr;
162 new_mapping->nr_bytes = nr_bytes;
163 new_mapping->bound = addr + (nr_bytes - 1);
165 new_mapping->mask = (unsigned) 0 - 1;
167 new_mapping->mask = modulo - 1;
168 if (attach == attach_raw_memory)
170 new_mapping->buffer = buffer;
171 new_mapping->free_buffer = free_buffer;
173 else if (attach >= attach_callback)
175 new_mapping->device = device;
178 sim_io_error (sd, "new_sim_core_mapping - internal error - unknown attach type %d\n",
187 sim_core_map_attach (SIM_DESC sd,
188 sim_core_map *access_map,
192 address_word nr_bytes,
194 device *client, /*callback/default*/
195 void *buffer, /*raw_memory*/
196 void *free_buffer) /*raw_memory*/
198 /* find the insertion point for this additional mapping and then
200 sim_core_mapping *next_mapping;
201 sim_core_mapping **last_mapping;
203 SIM_ASSERT ((attach >= attach_callback)
204 <= (client != NULL && buffer == NULL && free_buffer == NULL));
205 SIM_ASSERT ((attach == attach_raw_memory)
206 <= (client == NULL && buffer != NULL));
208 /* actually do occasionally get a zero size map */
212 device_error(client, "called on sim_core_map_attach with size zero");
214 sim_io_error (sd, "called on sim_core_map_attach with size zero");
218 /* find the insertion point (between last/next) */
219 next_mapping = access_map->first;
220 last_mapping = &access_map->first;
221 while(next_mapping != NULL
222 && (next_mapping->level < (int) attach
223 || (next_mapping->level == (int) attach
224 && next_mapping->bound < addr)))
226 /* provided levels are the same */
227 /* assert: next_mapping->base > all bases before next_mapping */
228 /* assert: next_mapping->bound >= all bounds before next_mapping */
229 last_mapping = &next_mapping->next;
230 next_mapping = next_mapping->next;
233 /* check insertion point correct */
234 SIM_ASSERT (next_mapping == NULL || next_mapping->level >= (int) attach);
235 if (next_mapping != NULL && next_mapping->level == (int) attach
236 && next_mapping->base < (addr + (nr_bytes - 1)))
239 device_error (client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
243 (long) (addr + (nr_bytes - 1)),
245 (long) next_mapping->base,
246 (long) next_mapping->bound,
247 (long) next_mapping->nr_bytes);
249 sim_io_error (sd, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
253 (long) (addr + (nr_bytes - 1)),
255 (long) next_mapping->base,
256 (long) next_mapping->bound,
257 (long) next_mapping->nr_bytes);
261 /* create/insert the new mapping */
262 *last_mapping = new_sim_core_mapping(sd,
264 space, addr, nr_bytes, modulo,
265 client, buffer, free_buffer);
266 (*last_mapping)->next = next_mapping;
272 sim_core_attach (SIM_DESC sd,
278 address_word nr_bytes,
281 void *optional_buffer)
283 sim_core *memory = STATE_CORE(sd);
288 /* check for for attempt to use unimplemented per-processor core map */
290 sim_io_error (sd, "sim_core_map_attach - processor specific memory map not yet supported");
292 if ((access & access_read_write_exec) == 0
293 || (access & ~access_read_write_exec) != 0)
296 device_error(client, "invalid access for core attach");
298 sim_io_error (sd, "invalid access for core attach");
302 /* verify the attach type */
303 if (attach == attach_raw_memory)
305 if (WITH_MODULO_MEMORY && modulo != 0)
307 unsigned mask = modulo - 1;
308 if (mask < 7) /* 8 is minimum modulo */
310 while (mask > 1) /* no zero bits */
320 device_error (client, "sim_core_attach - internal error - modulo not power of two");
322 sim_io_error (sd, "sim_core_attach - internal error - modulo not power of two");
326 else if (!WITH_MODULO_MEMORY && modulo != 0)
329 device_error (client, "sim_core_attach - internal error - modulo memory disabled");
331 sim_io_error (sd, "sim_core_attach - internal error - modulo memory disabled");
334 if (optional_buffer == NULL)
336 int padding = (addr % sizeof (unsigned64));
337 free_buffer = zalloc ((modulo == 0 ? nr_bytes : modulo) + padding);
338 buffer = (char*) free_buffer + padding;
342 buffer = optional_buffer;
346 else if (attach >= attach_callback)
354 device_error (client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
356 sim_io_error (sd, "sim_core_attach - internal error - conflicting buffer and attach arguments");
362 /* attach the region to all applicable access maps */
364 map < nr_sim_core_maps;
369 case sim_core_read_map:
370 if (access & access_read)
371 sim_core_map_attach (sd, &memory->common.map[map],
373 space, addr, nr_bytes, modulo,
374 client, buffer, free_buffer);
377 case sim_core_write_map:
378 if (access & access_write)
379 sim_core_map_attach (sd, &memory->common.map[map],
381 space, addr, nr_bytes, modulo,
382 client, buffer, free_buffer);
385 case sim_core_execute_map:
386 if (access & access_exec)
387 sim_core_map_attach (sd, &memory->common.map[map],
389 space, addr, nr_bytes, modulo,
390 client, buffer, free_buffer);
393 case nr_sim_core_maps:
394 sim_io_error (sd, "sim_core_attach - internal error - bad switch");
399 /* Just copy this map to each of the processor specific data structures.
400 FIXME - later this will be replaced by true processor specific
404 for (i = 0; i < MAX_NR_PROCESSORS; i++)
406 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
412 /* Remove any memory reference related to this address */
413 STATIC_INLINE_SIM_CORE\
415 sim_core_map_detach (SIM_DESC sd,
416 sim_core_map *access_map,
421 sim_core_mapping **entry;
422 for (entry = &access_map->first;
424 entry = &(*entry)->next)
426 if ((*entry)->base == addr
427 && (*entry)->level == (int) attach
428 && (*entry)->space == space)
430 sim_core_mapping *dead = (*entry);
431 (*entry) = dead->next;
432 if (dead->free_buffer != NULL)
433 zfree (dead->free_buffer);
442 sim_core_detach (SIM_DESC sd,
448 sim_core *memory = STATE_CORE (sd);
450 for (map = 0; map < nr_sim_core_maps; map++)
452 sim_core_map_detach (sd, &memory->common.map[map],
453 attach, address_space, addr);
455 /* Just copy this update to each of the processor specific data
456 structures. FIXME - later this will be replaced by true
457 processor specific maps. */
460 for (i = 0; i < MAX_NR_PROCESSORS; i++)
462 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
468 STATIC_INLINE_SIM_CORE\
470 sim_core_find_mapping(sim_core_common *core,
474 transfer_type transfer,
475 int abort, /*either 0 or 1 - hint to inline/-O */
476 sim_cpu *cpu, /* abort => cpu != NULL */
479 sim_core_mapping *mapping = core->map[map].first;
480 ASSERT ((addr & (nr_bytes - 1)) == 0); /* must be aligned */
481 ASSERT ((addr + (nr_bytes - 1)) >= addr); /* must not wrap */
482 ASSERT (!abort || cpu != NULL); /* abort needs a non null CPU */
483 while (mapping != NULL)
485 if (addr >= mapping->base
486 && (addr + (nr_bytes - 1)) <= mapping->bound)
488 mapping = mapping->next;
492 SIM_CORE_SIGNAL (CPU_STATE (cpu), cpu, cia, map, nr_bytes, addr, transfer,
493 sim_core_unmapped_signal);
499 STATIC_INLINE_SIM_CORE\
501 sim_core_translate (sim_core_mapping *mapping,
504 if (WITH_MODULO_MEMORY)
505 return (void *)((unsigned8 *) mapping->buffer
506 + ((addr - mapping->base) & mapping->mask));
508 return (void *)((unsigned8 *) mapping->buffer
509 + addr - mapping->base);
515 sim_core_read_buffer (SIM_DESC sd,
522 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
524 while (count < len) {
525 unsigned_word raddr = addr + count;
526 sim_core_mapping *mapping =
527 sim_core_find_mapping(core, map,
528 raddr, /*nr-bytes*/1,
530 0 /*dont-abort*/, NULL, NULL_CIA);
534 if (mapping->device != NULL) {
535 int nr_bytes = len - count;
536 if (raddr + nr_bytes - 1> mapping->bound)
537 nr_bytes = mapping->bound - raddr + 1;
538 if (device_io_read_buffer(mapping->device,
539 (unsigned_1*)buffer + count,
542 nr_bytes) != nr_bytes)
549 ((unsigned_1*)buffer)[count] =
550 *(unsigned_1*)sim_core_translate(mapping, raddr);
560 sim_core_write_buffer (SIM_DESC sd,
567 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
569 while (count < len) {
570 unsigned_word raddr = addr + count;
571 sim_core_mapping *mapping =
572 sim_core_find_mapping(core, map,
573 raddr, /*nr-bytes*/1,
575 0 /*dont-abort*/, NULL, NULL_CIA);
579 if (WITH_CALLBACK_MEMORY
580 && mapping->device != NULL) {
581 int nr_bytes = len - count;
582 if (raddr + nr_bytes - 1 > mapping->bound)
583 nr_bytes = mapping->bound - raddr + 1;
584 if (device_io_write_buffer(mapping->device,
585 (unsigned_1*)buffer + count,
588 nr_bytes) != nr_bytes)
595 *(unsigned_1*)sim_core_translate(mapping, raddr) =
596 ((unsigned_1*)buffer)[count];
606 sim_core_set_xor (SIM_DESC sd,
610 /* set up the XOR map if required. */
611 if (WITH_XOR_ENDIAN) {
613 sim_core *core = STATE_CORE (sd);
614 sim_cpu_core *cpu_core = (cpu != NULL ? CPU_CORE (cpu) : NULL);
615 if (cpu_core != NULL)
620 mask = WITH_XOR_ENDIAN - 1;
623 while (i - 1 < WITH_XOR_ENDIAN)
625 cpu_core->xor[i-1] = mask;
626 mask = (mask << 1) & (WITH_XOR_ENDIAN - 1);
633 core->byte_xor = WITH_XOR_ENDIAN - 1;
641 sim_engine_abort (sd, cpu, NULL_CIA,
642 "Attempted to enable xor-endian mode when permenantly disabled.");
646 STATIC_INLINE_SIM_CORE\
648 reverse_n (unsigned_1 *dest,
649 const unsigned_1 *src,
653 for (i = 0; i < nr_bytes; i++)
655 dest [nr_bytes - i - 1] = src [i];
662 sim_core_xor_read_buffer (SIM_DESC sd,
669 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
670 if (!WITH_XOR_ENDIAN || !byte_xor)
671 return sim_core_read_buffer (sd, cpu, map, buffer, addr, nr_bytes);
673 /* only break up transfers when xor-endian is both selected and enabled */
675 unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero-sized array */
676 unsigned nr_transfered = 0;
677 address_word start = addr;
678 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
680 /* initial and intermediate transfers are broken when they cross
681 an XOR endian boundary */
682 while (nr_transfered + nr_this_transfer < nr_bytes)
683 /* initial/intermediate transfers */
685 /* since xor-endian is enabled stop^xor defines the start
686 address of the transfer */
687 stop = start + nr_this_transfer - 1;
688 SIM_ASSERT (start <= stop);
689 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
690 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
692 return nr_transfered;
693 reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
694 nr_transfered += nr_this_transfer;
695 nr_this_transfer = WITH_XOR_ENDIAN;
699 nr_this_transfer = nr_bytes - nr_transfered;
700 stop = start + nr_this_transfer - 1;
701 SIM_ASSERT (stop == (addr + nr_bytes - 1));
702 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
704 return nr_transfered;
705 reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
713 sim_core_xor_write_buffer (SIM_DESC sd,
720 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
721 if (!WITH_XOR_ENDIAN || !byte_xor)
722 return sim_core_write_buffer (sd, cpu, map, buffer, addr, nr_bytes);
724 /* only break up transfers when xor-endian is both selected and enabled */
726 unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero sized array */
727 unsigned nr_transfered = 0;
728 address_word start = addr;
729 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
731 /* initial and intermediate transfers are broken when they cross
732 an XOR endian boundary */
733 while (nr_transfered + nr_this_transfer < nr_bytes)
734 /* initial/intermediate transfers */
736 /* since xor-endian is enabled stop^xor defines the start
737 address of the transfer */
738 stop = start + nr_this_transfer - 1;
739 SIM_ASSERT (start <= stop);
740 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
741 reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
742 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
744 return nr_transfered;
745 nr_transfered += nr_this_transfer;
746 nr_this_transfer = WITH_XOR_ENDIAN;
750 nr_this_transfer = nr_bytes - nr_transfered;
751 stop = start + nr_this_transfer - 1;
752 SIM_ASSERT (stop == (addr + nr_bytes - 1));
753 reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
754 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
756 return nr_transfered;
763 /* define the read/write 1/2/4/8/word functions */
766 #include "sim-n-core.h"
770 #include "sim-n-core.h"
774 #include "sim-n-core.h"
778 #include "sim-n-core.h"
782 #include "sim-n-core.h"