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"
32 /* "core" module install handler.
34 This is called via sim_module_install to install the "core"
35 subsystem into the simulator. */
38 static MODULE_INIT_FN sim_core_init;
39 static MODULE_UNINSTALL_FN sim_core_uninstall;
44 sim_core_install (SIM_DESC sd)
46 SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
48 /* establish the other handlers */
49 sim_module_add_uninstall_fn (sd, sim_core_uninstall);
50 sim_module_add_init_fn (sd, sim_core_init);
52 /* establish any initial data structures - none */
58 /* Uninstall the "core" subsystem from the simulator. */
62 sim_core_uninstall (SIM_DESC sd)
64 sim_core *core = STATE_CORE(sd);
66 /* blow away any mappings */
67 for (map = 0; map < nr_maps; map++) {
68 sim_core_mapping *curr = core->common.map[map].first;
69 while (curr != NULL) {
70 sim_core_mapping *tbd = curr;
72 if (tbd->free_buffer != NULL) {
73 SIM_ASSERT(tbd->buffer != NULL);
74 zfree(tbd->free_buffer);
78 core->common.map[map].first = NULL;
86 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))
100 #if EXTERN_SIM_CORE_P
102 sim_core_signal (SIM_DESC sd,
108 transfer_type transfer,
109 sim_core_signals sig)
111 const char *copy = (transfer == read_transfer ? "read" : "write");
112 address_word ip = CIA_ADDR (cia);
115 case sim_core_unmapped_signal:
116 sim_io_eprintf (sd, "core: %d byte %s to unmapped address 0x%lx at 0x%lx\n",
117 nr_bytes, copy, (unsigned long) addr, (unsigned long) ip);
118 sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGSEGV);
120 case sim_core_unaligned_signal:
121 sim_io_eprintf (sd, "core: %d byte misaligned %s to address 0x%lx at 0x%lx\n",
122 nr_bytes, copy, (unsigned long) addr, (unsigned long) ip);
123 sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGBUS);
126 sim_engine_abort (sd, cpu, cia,
127 "sim_core_signal - internal error - bad switch");
133 #if EXTERN_SIM_CORE_P
134 static sim_core_mapping *
135 new_sim_core_mapping (SIM_DESC sd,
139 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;
168 #if EXTERN_SIM_CORE_P
170 sim_core_map_attach (SIM_DESC sd,
171 sim_core_map *access_map,
175 address_word nr_bytes,
178 struct hw *client, /*callback/default*/
180 device *client, /*callback/default*/
182 void *buffer, /*raw_memory*/
183 void *free_buffer) /*raw_memory*/
185 /* find the insertion point for this additional mapping and then
187 sim_core_mapping *next_mapping;
188 sim_core_mapping **last_mapping;
190 SIM_ASSERT ((client == NULL) != (buffer == NULL));
191 SIM_ASSERT ((client == NULL) >= (free_buffer != NULL));
193 /* actually do occasionally get a zero size map */
197 device_error(client, "called on sim_core_map_attach with size zero");
200 sim_hw_abort (sd, client, "called on sim_core_map_attach with size zero");
202 sim_io_error (sd, "called on sim_core_map_attach with size zero");
205 /* find the insertion point (between last/next) */
206 next_mapping = access_map->first;
207 last_mapping = &access_map->first;
208 while(next_mapping != NULL
209 && (next_mapping->level < level
210 || (next_mapping->level == level
211 && next_mapping->bound < addr)))
213 /* provided levels are the same */
214 /* assert: next_mapping->base > all bases before next_mapping */
215 /* assert: next_mapping->bound >= all bounds before next_mapping */
216 last_mapping = &next_mapping->next;
217 next_mapping = next_mapping->next;
220 /* check insertion point correct */
221 SIM_ASSERT (next_mapping == NULL || next_mapping->level >= level);
222 if (next_mapping != NULL && next_mapping->level == level
223 && next_mapping->base < (addr + (nr_bytes - 1)))
226 device_error (client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
230 (long) (addr + (nr_bytes - 1)),
232 (long) next_mapping->base,
233 (long) next_mapping->bound,
234 (long) next_mapping->nr_bytes);
237 sim_hw_abort (sd, client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
241 (long) (addr + (nr_bytes - 1)),
243 (long) next_mapping->base,
244 (long) next_mapping->bound,
245 (long) next_mapping->nr_bytes);
247 sim_io_error (sd, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
251 (long) (addr + (nr_bytes - 1)),
253 (long) next_mapping->base,
254 (long) next_mapping->bound,
255 (long) next_mapping->nr_bytes);
258 /* create/insert the new mapping */
259 *last_mapping = new_sim_core_mapping(sd,
261 space, addr, nr_bytes, modulo,
262 client, buffer, free_buffer);
263 (*last_mapping)->next = next_mapping;
268 /* Attach memory or a memory mapped device to the simulator.
269 See sim-core.h for a full description. */
271 #if EXTERN_SIM_CORE_P
273 sim_core_attach (SIM_DESC sd,
279 address_word nr_bytes,
286 void *optional_buffer)
288 sim_core *memory = STATE_CORE(sd);
293 /* check for for attempt to use unimplemented per-processor core map */
295 sim_io_error (sd, "sim_core_map_attach - processor specific memory map not yet supported");
297 /* verify modulo memory */
298 if (!WITH_MODULO_MEMORY && modulo != 0)
301 device_error (client, "sim_core_attach - internal error - modulo memory disabled");
304 sim_hw_abort (sd, client, "sim_core_attach - internal error - modulo memory disabled");
306 sim_io_error (sd, "sim_core_attach - internal error - modulo memory disabled");
308 if (client != NULL && modulo != 0)
311 device_error (client, "sim_core_attach - internal error - modulo and callback memory conflict");
314 sim_hw_abort (sd, client, "sim_core_attach - internal error - modulo and callback memory conflict");
316 sim_io_error (sd, "sim_core_attach - internal error - modulo and callback memory conflict");
320 unsigned mask = modulo - 1;
322 while (mask >= sizeof (unsigned64)) /* minimum modulo */
329 if (mask != sizeof (unsigned64) - 1)
332 device_error (client, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
335 sim_hw_abort (sd, client, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
337 sim_io_error (sd, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
341 /* verify consistency between device and buffer */
342 if (client != NULL && optional_buffer != NULL)
345 device_error (client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
348 sim_hw_abort (sd, client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
350 sim_io_error (sd, "sim_core_attach - internal error - conflicting buffer and attach arguments");
354 if (optional_buffer == NULL)
356 int padding = (addr % sizeof (unsigned64));
357 unsigned long bytes = (modulo == 0 ? nr_bytes : modulo) + padding;
358 free_buffer = zalloc (bytes);
359 buffer = (char*) free_buffer + padding;
363 buffer = optional_buffer;
374 /* attach the region to all applicable access maps */
379 if (mapmask & (1 << map))
381 sim_core_map_attach (sd, &memory->common.map[map],
382 level, space, addr, nr_bytes, modulo,
383 client, buffer, free_buffer);
388 /* Just copy this map to each of the processor specific data structures.
389 FIXME - later this will be replaced by true processor specific
393 for (i = 0; i < MAX_NR_PROCESSORS; i++)
395 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
402 /* Remove any memory reference related to this address */
403 #if EXTERN_SIM_CORE_P
405 sim_core_map_detach (SIM_DESC sd,
406 sim_core_map *access_map,
411 sim_core_mapping **entry;
412 for (entry = &access_map->first;
414 entry = &(*entry)->next)
416 if ((*entry)->base == addr
417 && (*entry)->level == level
418 && (*entry)->space == space)
420 sim_core_mapping *dead = (*entry);
421 (*entry) = dead->next;
422 if (dead->free_buffer != NULL)
423 zfree (dead->free_buffer);
431 #if EXTERN_SIM_CORE_P
433 sim_core_detach (SIM_DESC sd,
439 sim_core *memory = STATE_CORE (sd);
441 for (map = 0; map < nr_maps; map++)
443 sim_core_map_detach (sd, &memory->common.map[map],
444 level, address_space, addr);
446 /* Just copy this update to each of the processor specific data
447 structures. FIXME - later this will be replaced by true
448 processor specific maps. */
451 for (i = 0; i < MAX_NR_PROCESSORS; i++)
453 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
460 STATIC_INLINE_SIM_CORE\
462 sim_core_find_mapping(sim_core_common *core,
466 transfer_type transfer,
467 int abort, /*either 0 or 1 - hint to inline/-O */
468 sim_cpu *cpu, /* abort => cpu != NULL */
471 sim_core_mapping *mapping = core->map[map].first;
472 ASSERT ((addr & (nr_bytes - 1)) == 0); /* must be aligned */
473 ASSERT ((addr + (nr_bytes - 1)) >= addr); /* must not wrap */
474 ASSERT (!abort || cpu != NULL); /* abort needs a non null CPU */
475 while (mapping != NULL)
477 if (addr >= mapping->base
478 && (addr + (nr_bytes - 1)) <= mapping->bound)
480 mapping = mapping->next;
484 SIM_CORE_SIGNAL (CPU_STATE (cpu), cpu, cia, map, nr_bytes, addr, transfer,
485 sim_core_unmapped_signal);
491 STATIC_INLINE_SIM_CORE\
493 sim_core_translate (sim_core_mapping *mapping,
496 if (WITH_MODULO_MEMORY)
497 return (void *)((unsigned8 *) mapping->buffer
498 + ((addr - mapping->base) & mapping->mask));
500 return (void *)((unsigned8 *) mapping->buffer
501 + addr - mapping->base);
505 #if EXTERN_SIM_CORE_P
507 sim_core_read_buffer (SIM_DESC sd,
514 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
518 unsigned_word raddr = addr + count;
519 sim_core_mapping *mapping =
520 sim_core_find_mapping (core, map,
521 raddr, /*nr-bytes*/1,
523 0 /*dont-abort*/, NULL, NULL_CIA);
527 if (mapping->device != NULL)
529 int nr_bytes = len - count;
530 sim_cia cia = cpu ? CIA_GET (cpu) : NULL_CIA;
531 if (raddr + nr_bytes - 1> mapping->bound)
532 nr_bytes = mapping->bound - raddr + 1;
533 if (device_io_read_buffer (mapping->device,
534 (unsigned_1*)buffer + count,
547 if (mapping->device != NULL)
549 int nr_bytes = len - count;
550 if (raddr + nr_bytes - 1> mapping->bound)
551 nr_bytes = mapping->bound - raddr + 1;
552 if (sim_hw_io_read_buffer (sd, mapping->device,
553 (unsigned_1*)buffer + count,
556 nr_bytes) != nr_bytes)
562 ((unsigned_1*)buffer)[count] =
563 *(unsigned_1*)sim_core_translate(mapping, raddr);
571 #if EXTERN_SIM_CORE_P
573 sim_core_write_buffer (SIM_DESC sd,
580 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
584 unsigned_word raddr = addr + count;
585 sim_core_mapping *mapping =
586 sim_core_find_mapping (core, map,
587 raddr, /*nr-bytes*/1,
589 0 /*dont-abort*/, NULL, NULL_CIA);
593 if (WITH_CALLBACK_MEMORY
594 && mapping->device != NULL)
596 int nr_bytes = len - count;
597 sim_cia cia = cpu ? CIA_GET (cpu) : NULL_CIA;
598 if (raddr + nr_bytes - 1 > mapping->bound)
599 nr_bytes = mapping->bound - raddr + 1;
600 if (device_io_write_buffer (mapping->device,
601 (unsigned_1*)buffer + count,
614 if (WITH_CALLBACK_MEMORY
615 && mapping->device != NULL)
617 int nr_bytes = len - count;
618 if (raddr + nr_bytes - 1 > mapping->bound)
619 nr_bytes = mapping->bound - raddr + 1;
620 if (sim_hw_io_write_buffer (sd, mapping->device,
621 (unsigned_1*)buffer + count,
624 nr_bytes) != nr_bytes)
630 *(unsigned_1*)sim_core_translate(mapping, raddr) =
631 ((unsigned_1*)buffer)[count];
639 #if EXTERN_SIM_CORE_P
641 sim_core_set_xor (SIM_DESC sd,
645 /* set up the XOR map if required. */
646 if (WITH_XOR_ENDIAN) {
648 sim_core *core = STATE_CORE (sd);
649 sim_cpu_core *cpu_core = (cpu != NULL ? CPU_CORE (cpu) : NULL);
650 if (cpu_core != NULL)
655 mask = WITH_XOR_ENDIAN - 1;
658 while (i - 1 < WITH_XOR_ENDIAN)
660 cpu_core->xor[i-1] = mask;
661 mask = (mask << 1) & (WITH_XOR_ENDIAN - 1);
668 core->byte_xor = WITH_XOR_ENDIAN - 1;
676 sim_engine_abort (sd, NULL, NULL_CIA,
677 "Attempted to enable xor-endian mode when permenantly disabled.");
683 #if EXTERN_SIM_CORE_P
685 reverse_n (unsigned_1 *dest,
686 const unsigned_1 *src,
690 for (i = 0; i < nr_bytes; i++)
692 dest [nr_bytes - i - 1] = src [i];
698 #if EXTERN_SIM_CORE_P
700 sim_core_xor_read_buffer (SIM_DESC sd,
707 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
708 if (!WITH_XOR_ENDIAN || !byte_xor)
709 return sim_core_read_buffer (sd, cpu, map, buffer, addr, nr_bytes);
711 /* only break up transfers when xor-endian is both selected and enabled */
713 unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero-sized array */
714 unsigned nr_transfered = 0;
715 address_word start = addr;
716 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
718 /* initial and intermediate transfers are broken when they cross
719 an XOR endian boundary */
720 while (nr_transfered + nr_this_transfer < nr_bytes)
721 /* initial/intermediate transfers */
723 /* since xor-endian is enabled stop^xor defines the start
724 address of the transfer */
725 stop = start + nr_this_transfer - 1;
726 SIM_ASSERT (start <= stop);
727 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
728 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
730 return nr_transfered;
731 reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
732 nr_transfered += nr_this_transfer;
733 nr_this_transfer = WITH_XOR_ENDIAN;
737 nr_this_transfer = nr_bytes - nr_transfered;
738 stop = start + nr_this_transfer - 1;
739 SIM_ASSERT (stop == (addr + nr_bytes - 1));
740 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
742 return nr_transfered;
743 reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
750 #if EXTERN_SIM_CORE_P
752 sim_core_xor_write_buffer (SIM_DESC sd,
759 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
760 if (!WITH_XOR_ENDIAN || !byte_xor)
761 return sim_core_write_buffer (sd, cpu, map, buffer, addr, nr_bytes);
763 /* only break up transfers when xor-endian is both selected and enabled */
765 unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero sized array */
766 unsigned nr_transfered = 0;
767 address_word start = addr;
768 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
770 /* initial and intermediate transfers are broken when they cross
771 an XOR endian boundary */
772 while (nr_transfered + nr_this_transfer < nr_bytes)
773 /* initial/intermediate transfers */
775 /* since xor-endian is enabled stop^xor defines the start
776 address of the transfer */
777 stop = start + nr_this_transfer - 1;
778 SIM_ASSERT (start <= stop);
779 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
780 reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
781 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
783 return nr_transfered;
784 nr_transfered += nr_this_transfer;
785 nr_this_transfer = WITH_XOR_ENDIAN;
789 nr_this_transfer = nr_bytes - nr_transfered;
790 stop = start + nr_this_transfer - 1;
791 SIM_ASSERT (stop == (addr + nr_bytes - 1));
792 reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
793 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
795 return nr_transfered;
803 /* define the read/write 1/2/4/8/16/word functions */
806 #include "sim-n-core.h"
809 #include "sim-n-core.h"
813 #include "sim-n-core.h"
817 #include "sim-n-core.h"
821 #include "sim-n-core.h"
824 #include "sim-n-core.h"
828 #include "sim-n-core.h"
831 #include "sim-n-core.h"
834 #include "sim-n-core.h"