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"
29 /* "core" module install handler.
31 This is called via sim_module_install to install the "core" subsystem
32 into the simulator. */
34 static MODULE_INIT_FN sim_core_init;
35 static MODULE_UNINSTALL_FN sim_core_uninstall;
39 sim_core_install (SIM_DESC sd)
41 SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
43 /* establish the other handlers */
44 sim_module_add_uninstall_fn (sd, sim_core_uninstall);
45 sim_module_add_init_fn (sd, sim_core_init);
47 /* establish any initial data structures - none */
52 /* Uninstall the "core" subsystem from the simulator. */
56 sim_core_uninstall (SIM_DESC sd)
58 sim_core *core = STATE_CORE(sd);
60 /* blow away any mappings */
61 for (map = 0; map < nr_sim_core_maps; map++) {
62 sim_core_mapping *curr = core->common.map[map].first;
63 while (curr != NULL) {
64 sim_core_mapping *tbd = curr;
66 if (tbd->free_buffer) {
67 SIM_ASSERT(tbd->buffer != NULL);
72 core->common.map[map].first = NULL;
79 sim_core_init (SIM_DESC sd)
87 #ifndef SIM_CORE_SIGNAL
88 #define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
89 sim_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), (TRANSFER), (ERROR))
93 sim_core_signal (SIM_DESC sd,
99 transfer_type transfer,
100 sim_core_signals sig)
102 const char *copy = (transfer == read_transfer ? "read" : "write");
105 case sim_core_unmapped_signal:
106 sim_engine_abort (sd, cpu, cia, "sim-core: %d byte %s to unmaped address 0x%lx",
107 nr_bytes, copy, (unsigned long) addr);
109 case sim_core_unaligned_signal:
110 sim_engine_abort (sd, cpu, cia, "sim-core: %d byte misaligned %s to address 0x%lx",
111 nr_bytes, copy, (unsigned long) addr);
114 sim_engine_abort (sd, cpu, cia, "sim_core_signal - internal error - bad switch");
120 STATIC_INLINE_SIM_CORE\
122 sim_core_map_to_str (sim_core_maps map)
126 case sim_core_read_map: return "read";
127 case sim_core_write_map: return "write";
128 case sim_core_execute_map: return "exec";
129 default: return "(invalid-map)";
136 new_sim_core_mapping (SIM_DESC sd,
140 address_word nr_bytes,
146 sim_core_mapping *new_mapping = ZALLOC(sim_core_mapping);
148 new_mapping->level = attach;
149 new_mapping->space = space;
150 new_mapping->base = addr;
151 new_mapping->nr_bytes = nr_bytes;
152 new_mapping->bound = addr + (nr_bytes - 1);
154 new_mapping->mask = (unsigned) 0 - 1;
156 new_mapping->mask = modulo - 1;
157 if (attach == attach_raw_memory)
159 new_mapping->buffer = buffer;
160 new_mapping->free_buffer = free_buffer;
162 else if (attach >= attach_callback)
164 new_mapping->device = device;
167 sim_io_error (sd, "new_sim_core_mapping - internal error - unknown attach type %d\n",
176 sim_core_map_attach (SIM_DESC sd,
177 sim_core_map *access_map,
181 address_word nr_bytes,
183 device *client, /*callback/default*/
184 void *buffer, /*raw_memory*/
185 int free_buffer) /*raw_memory*/
187 /* find the insertion point for this additional mapping and then
189 sim_core_mapping *next_mapping;
190 sim_core_mapping **last_mapping;
192 SIM_ASSERT ((attach >= attach_callback)
193 <= (client != NULL && buffer == NULL && !free_buffer));
194 SIM_ASSERT ((attach == attach_raw_memory)
195 <= (client == NULL && buffer != NULL));
197 /* actually do occasionally get a zero size map */
201 device_error(client, "called on sim_core_map_attach with size zero");
203 sim_io_error (sd, "called on sim_core_map_attach with size zero");
207 /* find the insertion point (between last/next) */
208 next_mapping = access_map->first;
209 last_mapping = &access_map->first;
210 while(next_mapping != NULL
211 && (next_mapping->level < (int) attach
212 || (next_mapping->level == (int) attach
213 && next_mapping->bound < addr)))
215 /* provided levels are the same */
216 /* assert: next_mapping->base > all bases before next_mapping */
217 /* assert: next_mapping->bound >= all bounds before next_mapping */
218 last_mapping = &next_mapping->next;
219 next_mapping = next_mapping->next;
222 /* check insertion point correct */
223 SIM_ASSERT (next_mapping == NULL || next_mapping->level >= (int) attach);
224 if (next_mapping != NULL && next_mapping->level == (int) attach
225 && next_mapping->base < (addr + (nr_bytes - 1)))
228 device_error (client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
232 (long) (addr + (nr_bytes - 1)),
234 (long) next_mapping->base,
235 (long) next_mapping->bound,
236 (long) next_mapping->nr_bytes);
238 sim_io_error (sd, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
242 (long) (addr + (nr_bytes - 1)),
244 (long) next_mapping->base,
245 (long) next_mapping->bound,
246 (long) next_mapping->nr_bytes);
250 /* create/insert the new mapping */
251 *last_mapping = new_sim_core_mapping(sd,
253 space, addr, nr_bytes, modulo,
254 client, buffer, free_buffer);
255 (*last_mapping)->next = next_mapping;
261 sim_core_attach (SIM_DESC sd,
267 address_word nr_bytes,
270 void *optional_buffer)
272 sim_core *memory = STATE_CORE(sd);
277 /* check for for attempt to use unimplemented per-processor core map */
279 sim_io_error (sd, "sim_core_map_attach - processor specific memory map not yet supported");
281 if ((access & access_read_write_exec) == 0
282 || (access & ~access_read_write_exec) != 0)
285 device_error(client, "invalid access for core attach");
287 sim_io_error (sd, "invalid access for core attach");
291 /* verify the attach type */
292 if (attach == attach_raw_memory)
294 if (WITH_MODULO_MEMORY && modulo != 0)
296 unsigned mask = modulo - 1;
297 if (mask < 7) /* 8 is minimum modulo */
299 while (mask > 1) /* no zero bits */
309 device_error (client, "sim_core_attach - internal error - modulo not power of two");
311 sim_io_error (sd, "sim_core_attach - internal error - modulo not power of two");
315 else if (!WITH_MODULO_MEMORY && modulo != 0)
318 device_error (client, "sim_core_attach - internal error - modulo memory disabled");
320 sim_io_error (sd, "sim_core_attach - internal error - modulo memory disabled");
323 if (optional_buffer == NULL)
325 buffer = zalloc (modulo == 0 ? nr_bytes : modulo);
330 buffer = optional_buffer;
334 else if (attach >= attach_callback)
342 device_error (client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
344 sim_io_error (sd, "sim_core_attach - internal error - conflicting buffer and attach arguments");
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],
361 space, addr, nr_bytes, modulo,
362 client, buffer, !buffer_freed);
365 case sim_core_write_map:
366 if (access & access_write)
367 sim_core_map_attach (sd, &memory->common.map[map],
369 space, addr, nr_bytes, modulo,
370 client, buffer, !buffer_freed);
373 case sim_core_execute_map:
374 if (access & access_exec)
375 sim_core_map_attach (sd, &memory->common.map[map],
377 space, addr, nr_bytes, modulo,
378 client, buffer, !buffer_freed);
381 case nr_sim_core_maps:
382 sim_io_error (sd, "sim_core_attach - internal error - bad switch");
387 /* Just copy this map to each of the processor specific data structures.
388 FIXME - later this will be replaced by true processor specific
392 for (i = 0; i < MAX_NR_PROCESSORS; i++)
394 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
400 /* Remove any memory reference related to this address */
401 STATIC_INLINE_SIM_CORE\
403 sim_core_map_detach (SIM_DESC sd,
404 sim_core_map *access_map,
409 sim_core_mapping **entry;
410 for (entry = &access_map->first;
412 entry = &(*entry)->next)
414 if ((*entry)->base == addr
415 && (*entry)->level == (int) attach
416 && (*entry)->space == space)
418 sim_core_mapping *dead = (*entry);
419 (*entry) = dead->next;
420 if (dead->free_buffer)
421 zfree (dead->buffer);
430 sim_core_detach (SIM_DESC sd,
436 sim_core *memory = STATE_CORE (sd);
438 for (map = 0; map < nr_sim_core_maps; map++)
440 sim_core_map_detach (sd, &memory->common.map[map],
441 attach, address_space, addr);
443 /* Just copy this update to each of the processor specific data
444 structures. FIXME - later this will be replaced by true
445 processor specific maps. */
448 for (i = 0; i < MAX_NR_PROCESSORS; i++)
450 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
456 STATIC_INLINE_SIM_CORE\
458 sim_core_find_mapping(sim_core_common *core,
462 transfer_type transfer,
463 int abort, /*either 0 or 1 - hint to inline/-O */
464 sim_cpu *cpu, /* abort => cpu != NULL */
467 sim_core_mapping *mapping = core->map[map].first;
468 ASSERT ((addr & (nr_bytes - 1)) == 0); /* must be aligned */
469 ASSERT ((addr + (nr_bytes - 1)) >= addr); /* must not wrap */
470 ASSERT (!abort || cpu != NULL); /* abort needs a non null CPU */
471 while (mapping != NULL)
473 if (addr >= mapping->base
474 && (addr + (nr_bytes - 1)) <= mapping->bound)
476 mapping = mapping->next;
480 SIM_CORE_SIGNAL (CPU_STATE (cpu), cpu, cia, map, nr_bytes, addr, transfer,
481 sim_core_unmapped_signal);
487 STATIC_INLINE_SIM_CORE\
489 sim_core_translate (sim_core_mapping *mapping,
492 if (WITH_MODULO_MEMORY)
493 return (void *)((unsigned8 *) mapping->buffer
494 + ((addr - mapping->base) & mapping->mask));
496 return (void *)((unsigned8 *) mapping->buffer
497 + addr - mapping->base);
503 sim_core_read_buffer (SIM_DESC sd,
510 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
512 while (count < len) {
513 unsigned_word raddr = addr + count;
514 sim_core_mapping *mapping =
515 sim_core_find_mapping(core, map,
516 raddr, /*nr-bytes*/1,
518 0 /*dont-abort*/, NULL, NULL_CIA);
522 if (mapping->device != NULL) {
523 int nr_bytes = len - count;
524 if (raddr + nr_bytes - 1> mapping->bound)
525 nr_bytes = mapping->bound - raddr + 1;
526 if (device_io_read_buffer(mapping->device,
527 (unsigned_1*)buffer + count,
530 nr_bytes) != nr_bytes)
537 ((unsigned_1*)buffer)[count] =
538 *(unsigned_1*)sim_core_translate(mapping, raddr);
548 sim_core_write_buffer (SIM_DESC sd,
555 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
557 while (count < len) {
558 unsigned_word raddr = addr + count;
559 sim_core_mapping *mapping =
560 sim_core_find_mapping(core, map,
561 raddr, /*nr-bytes*/1,
563 0 /*dont-abort*/, NULL, NULL_CIA);
567 if (WITH_CALLBACK_MEMORY
568 && mapping->device != NULL) {
569 int nr_bytes = len - count;
570 if (raddr + nr_bytes - 1 > mapping->bound)
571 nr_bytes = mapping->bound - raddr + 1;
572 if (device_io_write_buffer(mapping->device,
573 (unsigned_1*)buffer + count,
576 nr_bytes) != nr_bytes)
583 *(unsigned_1*)sim_core_translate(mapping, raddr) =
584 ((unsigned_1*)buffer)[count];
594 sim_core_set_xor (SIM_DESC sd,
598 /* set up the XOR map if required. */
599 if (WITH_XOR_ENDIAN) {
601 sim_core *core = STATE_CORE (sd);
602 sim_cpu_core *cpu_core = (cpu != NULL ? CPU_CORE (cpu) : NULL);
603 if (cpu_core != NULL)
608 mask = WITH_XOR_ENDIAN - 1;
611 while (i - 1 < WITH_XOR_ENDIAN)
613 cpu_core->xor[i-1] = mask;
614 mask = (mask << 1) & (WITH_XOR_ENDIAN - 1);
621 core->byte_xor = WITH_XOR_ENDIAN - 1;
629 sim_engine_abort (sd, cpu, NULL_CIA,
630 "Attempted to enable xor-endian mode when permenantly disabled.");
634 STATIC_INLINE_SIM_CORE\
636 reverse_n (unsigned_1 *dest,
637 const unsigned_1 *src,
641 for (i = 0; i < nr_bytes; i++)
643 dest [nr_bytes - i - 1] = src [i];
650 sim_core_xor_read_buffer (SIM_DESC sd,
657 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
658 if (!WITH_XOR_ENDIAN || !byte_xor)
659 return sim_core_read_buffer (sd, cpu, map, buffer, addr, nr_bytes);
661 /* only break up transfers when xor-endian is both selected and enabled */
663 unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero-sized array */
664 unsigned nr_transfered = 0;
665 address_word start = addr;
666 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
668 /* initial and intermediate transfers are broken when they cross
669 an XOR endian boundary */
670 while (nr_transfered + nr_this_transfer < nr_bytes)
671 /* initial/intermediate transfers */
673 /* since xor-endian is enabled stop^xor defines the start
674 address of the transfer */
675 stop = start + nr_this_transfer - 1;
676 SIM_ASSERT (start <= stop);
677 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
678 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
680 return nr_transfered;
681 reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
682 nr_transfered += nr_this_transfer;
683 nr_this_transfer = WITH_XOR_ENDIAN;
687 nr_this_transfer = nr_bytes - nr_transfered;
688 stop = start + nr_this_transfer - 1;
689 SIM_ASSERT (stop == (addr + nr_bytes - 1));
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);
701 sim_core_xor_write_buffer (SIM_DESC sd,
708 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
709 if (!WITH_XOR_ENDIAN || !byte_xor)
710 return sim_core_write_buffer (sd, cpu, map, buffer, addr, nr_bytes);
712 /* only break up transfers when xor-endian is both selected and enabled */
714 unsigned_1 x[WITH_XOR_ENDIAN];
715 unsigned nr_transfered = 0;
716 address_word start = addr;
717 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
719 /* initial and intermediate transfers are broken when they cross
720 an XOR endian boundary */
721 while (nr_transfered + nr_this_transfer < nr_bytes)
722 /* initial/intermediate transfers */
724 /* since xor-endian is enabled stop^xor defines the start
725 address of the transfer */
726 stop = start + nr_this_transfer - 1;
727 SIM_ASSERT (start <= stop);
728 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
729 reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
730 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
732 return nr_transfered;
733 nr_transfered += nr_this_transfer;
734 nr_this_transfer = WITH_XOR_ENDIAN;
738 nr_this_transfer = nr_bytes - nr_transfered;
739 stop = start + nr_this_transfer - 1;
740 SIM_ASSERT (stop == (addr + nr_bytes - 1));
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;
751 /* define the read/write 1/2/4/8/word functions */
754 #include "sim-n-core.h"
758 #include "sim-n-core.h"
762 #include "sim-n-core.h"
766 #include "sim-n-core.h"
770 #include "sim-n-core.h"