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"
28 /* "core" module install handler.
30 This is called via sim_module_install to install the "core" subsystem
31 into the simulator. */
33 static MODULE_INIT_FN sim_core_init;
34 static MODULE_UNINSTALL_FN sim_core_uninstall;
38 sim_core_install (SIM_DESC sd)
40 SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
42 /* establish the other handlers */
43 sim_module_add_uninstall_fn (sd, sim_core_uninstall);
44 sim_module_add_init_fn (sd, sim_core_init);
46 /* establish any initial data structures - none */
51 /* Uninstall the "core" subsystem from the simulator. */
55 sim_core_uninstall (SIM_DESC sd)
57 sim_core *core = STATE_CORE(sd);
59 /* blow away any mappings */
60 for (map = 0; map < nr_sim_core_maps; map++) {
61 sim_core_mapping *curr = core->common.map[map].first;
62 while (curr != NULL) {
63 sim_core_mapping *tbd = curr;
65 if (tbd->free_buffer != NULL) {
66 SIM_ASSERT(tbd->buffer != NULL);
67 zfree(tbd->free_buffer);
71 core->common.map[map].first = NULL;
78 sim_core_init (SIM_DESC sd)
86 #ifndef SIM_CORE_SIGNAL
87 #define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
88 sim_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), (TRANSFER), (ERROR))
92 sim_core_signal (SIM_DESC sd,
98 transfer_type transfer,
101 const char *copy = (transfer == read_transfer ? "read" : "write");
102 address_word ip = CIA_ADDR (cia);
105 case sim_core_unmapped_signal:
106 sim_io_eprintf (sd, "core: %d byte %s to unmaped address 0x%lx at 0x%lx\n",
107 nr_bytes, copy, (unsigned long) addr, (unsigned long) ip);
108 sim_engine_halt (sd, cpu, NULL, cia, sim_signalled, SIM_SIGSEGV);
110 case sim_core_unaligned_signal:
111 sim_io_eprintf (sd, "core: %d byte misaligned %s to address 0x%lx at 0x%lx\n",
112 nr_bytes, copy, (unsigned long) addr, (unsigned long) ip);
113 sim_engine_halt (sd, cpu, NULL, cia, sim_signalled, SIM_SIGBUS);
116 sim_engine_abort (sd, cpu, cia,
117 "sim_core_signal - internal error - bad switch");
123 STATIC_INLINE_SIM_CORE\
125 sim_core_map_to_str (sim_core_maps map)
129 case sim_core_read_map: return "read";
130 case sim_core_write_map: return "write";
131 case sim_core_execute_map: return "exec";
132 default: return "(invalid-map)";
139 new_sim_core_mapping (SIM_DESC sd,
143 address_word nr_bytes,
149 sim_core_mapping *new_mapping = ZALLOC(sim_core_mapping);
151 new_mapping->level = level;
152 new_mapping->space = space;
153 new_mapping->base = addr;
154 new_mapping->nr_bytes = nr_bytes;
155 new_mapping->bound = addr + (nr_bytes - 1);
157 new_mapping->mask = (unsigned) 0 - 1;
159 new_mapping->mask = modulo - 1;
160 new_mapping->buffer = buffer;
161 new_mapping->free_buffer = free_buffer;
162 new_mapping->device = device;
169 sim_core_map_attach (SIM_DESC sd,
170 sim_core_map *access_map,
174 address_word nr_bytes,
176 device *client, /*callback/default*/
177 void *buffer, /*raw_memory*/
178 void *free_buffer) /*raw_memory*/
180 /* find the insertion point for this additional mapping and then
182 sim_core_mapping *next_mapping;
183 sim_core_mapping **last_mapping;
185 SIM_ASSERT ((client == NULL) != (buffer == NULL));
186 SIM_ASSERT ((client == NULL) >= (free_buffer != NULL));
188 /* actually do occasionally get a zero size map */
192 device_error(client, "called on sim_core_map_attach with size zero");
194 sim_io_error (sd, "called on sim_core_map_attach with size zero");
198 /* find the insertion point (between last/next) */
199 next_mapping = access_map->first;
200 last_mapping = &access_map->first;
201 while(next_mapping != NULL
202 && (next_mapping->level < level
203 || (next_mapping->level == level
204 && next_mapping->bound < addr)))
206 /* provided levels are the same */
207 /* assert: next_mapping->base > all bases before next_mapping */
208 /* assert: next_mapping->bound >= all bounds before next_mapping */
209 last_mapping = &next_mapping->next;
210 next_mapping = next_mapping->next;
213 /* check insertion point correct */
214 SIM_ASSERT (next_mapping == NULL || next_mapping->level >= level);
215 if (next_mapping != NULL && next_mapping->level == level
216 && next_mapping->base < (addr + (nr_bytes - 1)))
219 device_error (client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
223 (long) (addr + (nr_bytes - 1)),
225 (long) next_mapping->base,
226 (long) next_mapping->bound,
227 (long) next_mapping->nr_bytes);
229 sim_io_error (sd, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
233 (long) (addr + (nr_bytes - 1)),
235 (long) next_mapping->base,
236 (long) next_mapping->bound,
237 (long) next_mapping->nr_bytes);
241 /* create/insert the new mapping */
242 *last_mapping = new_sim_core_mapping(sd,
244 space, addr, nr_bytes, modulo,
245 client, buffer, free_buffer);
246 (*last_mapping)->next = next_mapping;
252 sim_core_attach (SIM_DESC sd,
258 address_word nr_bytes,
261 void *optional_buffer)
263 sim_core *memory = STATE_CORE(sd);
268 /* check for for attempt to use unimplemented per-processor core map */
270 sim_io_error (sd, "sim_core_map_attach - processor specific memory map not yet supported");
272 if ((access & access_read_write_exec) == 0
273 || (access & ~access_read_write_exec) != 0)
276 device_error(client, "invalid access for core attach");
278 sim_io_error (sd, "invalid access for core attach");
282 /* verify modulo memory */
283 if (!WITH_MODULO_MEMORY && modulo != 0)
286 device_error (client, "sim_core_attach - internal error - modulo memory disabled");
288 sim_io_error (sd, "sim_core_attach - internal error - modulo memory disabled");
291 if (client != NULL && modulo != 0)
294 device_error (client, "sim_core_attach - internal error - modulo and callback memory conflict");
296 sim_io_error (sd, "sim_core_attach - internal error - modulo and callback memory conflict");
301 unsigned mask = modulo - 1;
303 while (mask >= sizeof (unsigned64)) /* minimum modulo */
310 if (mask != sizeof (unsigned64) - 1)
313 device_error (client, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
315 sim_io_error (sd, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
320 /* verify consistency between device and buffer */
321 if (client != NULL && optional_buffer != NULL)
324 device_error (client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
326 sim_io_error (sd, "sim_core_attach - internal error - conflicting buffer and attach arguments");
331 if (optional_buffer == NULL)
333 int padding = (addr % sizeof (unsigned64));
334 free_buffer = zalloc ((modulo == 0 ? nr_bytes : modulo) + padding);
335 buffer = (char*) free_buffer + padding;
339 buffer = optional_buffer;
350 /* attach the region to all applicable access maps */
352 map < nr_sim_core_maps;
357 case sim_core_read_map:
358 if (access & access_read)
359 sim_core_map_attach (sd, &memory->common.map[map],
360 level, space, addr, nr_bytes, modulo,
361 client, buffer, free_buffer);
364 case sim_core_write_map:
365 if (access & access_write)
366 sim_core_map_attach (sd, &memory->common.map[map],
367 level, space, addr, nr_bytes, modulo,
368 client, buffer, free_buffer);
371 case sim_core_execute_map:
372 if (access & access_exec)
373 sim_core_map_attach (sd, &memory->common.map[map],
374 level, space, addr, nr_bytes, modulo,
375 client, buffer, free_buffer);
378 case nr_sim_core_maps:
379 sim_io_error (sd, "sim_core_attach - internal error - bad switch");
384 /* Just copy this map to each of the processor specific data structures.
385 FIXME - later this will be replaced by true processor specific
389 for (i = 0; i < MAX_NR_PROCESSORS; i++)
391 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
397 /* Remove any memory reference related to this address */
398 STATIC_INLINE_SIM_CORE\
400 sim_core_map_detach (SIM_DESC sd,
401 sim_core_map *access_map,
406 sim_core_mapping **entry;
407 for (entry = &access_map->first;
409 entry = &(*entry)->next)
411 if ((*entry)->base == addr
412 && (*entry)->level == level
413 && (*entry)->space == space)
415 sim_core_mapping *dead = (*entry);
416 (*entry) = dead->next;
417 if (dead->free_buffer != NULL)
418 zfree (dead->free_buffer);
427 sim_core_detach (SIM_DESC sd,
433 sim_core *memory = STATE_CORE (sd);
435 for (map = 0; map < nr_sim_core_maps; map++)
437 sim_core_map_detach (sd, &memory->common.map[map],
438 level, address_space, addr);
440 /* Just copy this update to each of the processor specific data
441 structures. FIXME - later this will be replaced by true
442 processor specific maps. */
445 for (i = 0; i < MAX_NR_PROCESSORS; i++)
447 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
453 STATIC_INLINE_SIM_CORE\
455 sim_core_find_mapping(sim_core_common *core,
459 transfer_type transfer,
460 int abort, /*either 0 or 1 - hint to inline/-O */
461 sim_cpu *cpu, /* abort => cpu != NULL */
464 sim_core_mapping *mapping = core->map[map].first;
465 ASSERT ((addr & (nr_bytes - 1)) == 0); /* must be aligned */
466 ASSERT ((addr + (nr_bytes - 1)) >= addr); /* must not wrap */
467 ASSERT (!abort || cpu != NULL); /* abort needs a non null CPU */
468 while (mapping != NULL)
470 if (addr >= mapping->base
471 && (addr + (nr_bytes - 1)) <= mapping->bound)
473 mapping = mapping->next;
477 SIM_CORE_SIGNAL (CPU_STATE (cpu), cpu, cia, map, nr_bytes, addr, transfer,
478 sim_core_unmapped_signal);
484 STATIC_INLINE_SIM_CORE\
486 sim_core_translate (sim_core_mapping *mapping,
489 if (WITH_MODULO_MEMORY)
490 return (void *)((unsigned8 *) mapping->buffer
491 + ((addr - mapping->base) & mapping->mask));
493 return (void *)((unsigned8 *) mapping->buffer
494 + addr - mapping->base);
500 sim_core_read_buffer (SIM_DESC sd,
507 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
509 while (count < len) {
510 unsigned_word raddr = addr + count;
511 sim_core_mapping *mapping =
512 sim_core_find_mapping(core, map,
513 raddr, /*nr-bytes*/1,
515 0 /*dont-abort*/, NULL, NULL_CIA);
519 if (mapping->device != NULL) {
520 int nr_bytes = len - count;
521 if (raddr + nr_bytes - 1> mapping->bound)
522 nr_bytes = mapping->bound - raddr + 1;
523 if (device_io_read_buffer(mapping->device,
524 (unsigned_1*)buffer + count,
527 nr_bytes) != nr_bytes)
534 ((unsigned_1*)buffer)[count] =
535 *(unsigned_1*)sim_core_translate(mapping, raddr);
545 sim_core_write_buffer (SIM_DESC sd,
552 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
554 while (count < len) {
555 unsigned_word raddr = addr + count;
556 sim_core_mapping *mapping =
557 sim_core_find_mapping(core, map,
558 raddr, /*nr-bytes*/1,
560 0 /*dont-abort*/, NULL, NULL_CIA);
564 if (WITH_CALLBACK_MEMORY
565 && mapping->device != NULL) {
566 int nr_bytes = len - count;
567 if (raddr + nr_bytes - 1 > mapping->bound)
568 nr_bytes = mapping->bound - raddr + 1;
569 if (device_io_write_buffer(mapping->device,
570 (unsigned_1*)buffer + count,
573 nr_bytes) != nr_bytes)
580 *(unsigned_1*)sim_core_translate(mapping, raddr) =
581 ((unsigned_1*)buffer)[count];
591 sim_core_set_xor (SIM_DESC sd,
595 /* set up the XOR map if required. */
596 if (WITH_XOR_ENDIAN) {
598 sim_core *core = STATE_CORE (sd);
599 sim_cpu_core *cpu_core = (cpu != NULL ? CPU_CORE (cpu) : NULL);
600 if (cpu_core != NULL)
605 mask = WITH_XOR_ENDIAN - 1;
608 while (i - 1 < WITH_XOR_ENDIAN)
610 cpu_core->xor[i-1] = mask;
611 mask = (mask << 1) & (WITH_XOR_ENDIAN - 1);
618 core->byte_xor = WITH_XOR_ENDIAN - 1;
626 sim_engine_abort (sd, cpu, NULL_CIA,
627 "Attempted to enable xor-endian mode when permenantly disabled.");
631 STATIC_INLINE_SIM_CORE\
633 reverse_n (unsigned_1 *dest,
634 const unsigned_1 *src,
638 for (i = 0; i < nr_bytes; i++)
640 dest [nr_bytes - i - 1] = src [i];
647 sim_core_xor_read_buffer (SIM_DESC sd,
654 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
655 if (!WITH_XOR_ENDIAN || !byte_xor)
656 return sim_core_read_buffer (sd, cpu, map, buffer, addr, nr_bytes);
658 /* only break up transfers when xor-endian is both selected and enabled */
660 unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero-sized array */
661 unsigned nr_transfered = 0;
662 address_word start = addr;
663 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
665 /* initial and intermediate transfers are broken when they cross
666 an XOR endian boundary */
667 while (nr_transfered + nr_this_transfer < nr_bytes)
668 /* initial/intermediate transfers */
670 /* since xor-endian is enabled stop^xor defines the start
671 address of the transfer */
672 stop = start + nr_this_transfer - 1;
673 SIM_ASSERT (start <= stop);
674 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
675 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
677 return nr_transfered;
678 reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
679 nr_transfered += nr_this_transfer;
680 nr_this_transfer = WITH_XOR_ENDIAN;
684 nr_this_transfer = nr_bytes - nr_transfered;
685 stop = start + nr_this_transfer - 1;
686 SIM_ASSERT (stop == (addr + nr_bytes - 1));
687 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
689 return nr_transfered;
690 reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
698 sim_core_xor_write_buffer (SIM_DESC sd,
705 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
706 if (!WITH_XOR_ENDIAN || !byte_xor)
707 return sim_core_write_buffer (sd, cpu, map, buffer, addr, nr_bytes);
709 /* only break up transfers when xor-endian is both selected and enabled */
711 unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero sized array */
712 unsigned nr_transfered = 0;
713 address_word start = addr;
714 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
716 /* initial and intermediate transfers are broken when they cross
717 an XOR endian boundary */
718 while (nr_transfered + nr_this_transfer < nr_bytes)
719 /* initial/intermediate transfers */
721 /* since xor-endian is enabled stop^xor defines the start
722 address of the transfer */
723 stop = start + nr_this_transfer - 1;
724 SIM_ASSERT (start <= stop);
725 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
726 reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
727 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
729 return nr_transfered;
730 nr_transfered += nr_this_transfer;
731 nr_this_transfer = WITH_XOR_ENDIAN;
735 nr_this_transfer = nr_bytes - nr_transfered;
736 stop = start + nr_this_transfer - 1;
737 SIM_ASSERT (stop == (addr + nr_bytes - 1));
738 reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
739 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
741 return nr_transfered;
748 /* define the read/write 1/2/4/8/16/word functions */
751 #include "sim-n-core.h"
754 #include "sim-n-core.h"
758 #include "sim-n-core.h"
762 #include "sim-n-core.h"
766 #include "sim-n-core.h"
769 #include "sim-n-core.h"
773 #include "sim-n-core.h"
776 #include "sim-n-core.h"
779 #include "sim-n-core.h"