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"
33 /* TODO: create sim/common/device.h */
34 void device_error (device *me, char* message, ...);
35 int device_io_read_buffer(device *me, void *dest, int space, address_word addr, unsigned nr_bytes, sim_cpu *processor, sim_cia cia);
36 int device_io_write_buffer(device *me, const void *source, int space, address_word addr, unsigned nr_bytes, sim_cpu *processor, sim_cia cia);
39 /* "core" module install handler.
41 This is called via sim_module_install to install the "core"
42 subsystem into the simulator. */
45 static MODULE_INIT_FN sim_core_init;
46 static MODULE_UNINSTALL_FN sim_core_uninstall;
51 sim_core_install (SIM_DESC sd)
53 SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
55 /* establish the other handlers */
56 sim_module_add_uninstall_fn (sd, sim_core_uninstall);
57 sim_module_add_init_fn (sd, sim_core_init);
59 /* establish any initial data structures - none */
65 /* Uninstall the "core" subsystem from the simulator. */
69 sim_core_uninstall (SIM_DESC sd)
71 sim_core *core = STATE_CORE(sd);
73 /* blow away any mappings */
74 for (map = 0; map < nr_maps; map++) {
75 sim_core_mapping *curr = core->common.map[map].first;
76 while (curr != NULL) {
77 sim_core_mapping *tbd = curr;
79 if (tbd->free_buffer != NULL) {
80 SIM_ASSERT(tbd->buffer != NULL);
81 zfree(tbd->free_buffer);
85 core->common.map[map].first = NULL;
93 sim_core_init (SIM_DESC sd)
102 #ifndef SIM_CORE_SIGNAL
103 #define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
104 sim_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), (TRANSFER), (ERROR))
107 #if EXTERN_SIM_CORE_P
109 sim_core_signal (SIM_DESC sd,
115 transfer_type transfer,
116 sim_core_signals sig)
118 const char *copy = (transfer == read_transfer ? "read" : "write");
119 address_word ip = CIA_ADDR (cia);
122 case sim_core_unmapped_signal:
123 sim_io_eprintf (sd, "core: %d byte %s to unmapped address 0x%lx at 0x%lx\n",
124 nr_bytes, copy, (unsigned long) addr, (unsigned long) ip);
125 sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGSEGV);
127 case sim_core_unaligned_signal:
128 sim_io_eprintf (sd, "core: %d byte misaligned %s to address 0x%lx at 0x%lx\n",
129 nr_bytes, copy, (unsigned long) addr, (unsigned long) ip);
130 sim_engine_halt (sd, cpu, NULL, cia, sim_stopped, SIM_SIGBUS);
133 sim_engine_abort (sd, cpu, cia,
134 "sim_core_signal - internal error - bad switch");
140 #if EXTERN_SIM_CORE_P
141 static sim_core_mapping *
142 new_sim_core_mapping (SIM_DESC sd,
146 address_word nr_bytes,
156 sim_core_mapping *new_mapping = ZALLOC(sim_core_mapping);
158 new_mapping->level = level;
159 new_mapping->space = space;
160 new_mapping->base = addr;
161 new_mapping->nr_bytes = nr_bytes;
162 new_mapping->bound = addr + (nr_bytes - 1);
164 new_mapping->mask = (unsigned) 0 - 1;
166 new_mapping->mask = modulo - 1;
167 new_mapping->buffer = buffer;
168 new_mapping->free_buffer = free_buffer;
169 new_mapping->device = device;
175 #if EXTERN_SIM_CORE_P
177 sim_core_map_attach (SIM_DESC sd,
178 sim_core_map *access_map,
182 address_word nr_bytes,
185 struct hw *client, /*callback/default*/
187 device *client, /*callback/default*/
189 void *buffer, /*raw_memory*/
190 void *free_buffer) /*raw_memory*/
192 /* find the insertion point for this additional mapping and then
194 sim_core_mapping *next_mapping;
195 sim_core_mapping **last_mapping;
197 SIM_ASSERT ((client == NULL) != (buffer == NULL));
198 SIM_ASSERT ((client == NULL) >= (free_buffer != NULL));
200 /* actually do occasionally get a zero size map */
204 device_error(client, "called on sim_core_map_attach with size zero");
207 sim_hw_abort (sd, client, "called on sim_core_map_attach with size zero");
209 sim_io_error (sd, "called on sim_core_map_attach with size zero");
212 /* find the insertion point (between last/next) */
213 next_mapping = access_map->first;
214 last_mapping = &access_map->first;
215 while(next_mapping != NULL
216 && (next_mapping->level < level
217 || (next_mapping->level == level
218 && next_mapping->bound < addr)))
220 /* provided levels are the same */
221 /* assert: next_mapping->base > all bases before next_mapping */
222 /* assert: next_mapping->bound >= all bounds before next_mapping */
223 last_mapping = &next_mapping->next;
224 next_mapping = next_mapping->next;
227 /* check insertion point correct */
228 SIM_ASSERT (next_mapping == NULL || next_mapping->level >= level);
229 if (next_mapping != NULL && next_mapping->level == level
230 && next_mapping->base < (addr + (nr_bytes - 1)))
233 device_error (client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
237 (long) (addr + (nr_bytes - 1)),
239 (long) next_mapping->base,
240 (long) next_mapping->bound,
241 (long) next_mapping->nr_bytes);
244 sim_hw_abort (sd, client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
248 (long) (addr + (nr_bytes - 1)),
250 (long) next_mapping->base,
251 (long) next_mapping->bound,
252 (long) next_mapping->nr_bytes);
254 sim_io_error (sd, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
258 (long) (addr + (nr_bytes - 1)),
260 (long) next_mapping->base,
261 (long) next_mapping->bound,
262 (long) next_mapping->nr_bytes);
265 /* create/insert the new mapping */
266 *last_mapping = new_sim_core_mapping(sd,
268 space, addr, nr_bytes, modulo,
269 client, buffer, free_buffer);
270 (*last_mapping)->next = next_mapping;
275 /* Attach memory or a memory mapped device to the simulator.
276 See sim-core.h for a full description. */
278 #if EXTERN_SIM_CORE_P
280 sim_core_attach (SIM_DESC sd,
286 address_word nr_bytes,
293 void *optional_buffer)
295 sim_core *memory = STATE_CORE(sd);
300 /* check for for attempt to use unimplemented per-processor core map */
302 sim_io_error (sd, "sim_core_map_attach - processor specific memory map not yet supported");
304 /* verify modulo memory */
305 if (!WITH_MODULO_MEMORY && modulo != 0)
308 device_error (client, "sim_core_attach - internal error - modulo memory disabled");
311 sim_hw_abort (sd, client, "sim_core_attach - internal error - modulo memory disabled");
313 sim_io_error (sd, "sim_core_attach - internal error - modulo memory disabled");
315 if (client != NULL && modulo != 0)
318 device_error (client, "sim_core_attach - internal error - modulo and callback memory conflict");
321 sim_hw_abort (sd, client, "sim_core_attach - internal error - modulo and callback memory conflict");
323 sim_io_error (sd, "sim_core_attach - internal error - modulo and callback memory conflict");
327 unsigned mask = modulo - 1;
329 while (mask >= sizeof (unsigned64)) /* minimum modulo */
336 if (mask != sizeof (unsigned64) - 1)
339 device_error (client, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
342 sim_hw_abort (sd, client, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
344 sim_io_error (sd, "sim_core_attach - internal error - modulo %lx not power of two", (long) modulo);
348 /* verify consistency between device and buffer */
349 if (client != NULL && optional_buffer != NULL)
352 device_error (client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
355 sim_hw_abort (sd, client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
357 sim_io_error (sd, "sim_core_attach - internal error - conflicting buffer and attach arguments");
361 if (optional_buffer == NULL)
363 int padding = (addr % sizeof (unsigned64));
364 unsigned long bytes = (modulo == 0 ? nr_bytes : modulo) + padding;
365 free_buffer = zalloc (bytes);
366 buffer = (char*) free_buffer + padding;
370 buffer = optional_buffer;
381 /* attach the region to all applicable access maps */
386 if (mapmask & (1 << map))
388 sim_core_map_attach (sd, &memory->common.map[map],
389 level, space, addr, nr_bytes, modulo,
390 client, buffer, free_buffer);
395 /* Just copy this map to each of the processor specific data structures.
396 FIXME - later this will be replaced by true processor specific
400 for (i = 0; i < MAX_NR_PROCESSORS; i++)
402 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
409 /* Remove any memory reference related to this address */
410 #if EXTERN_SIM_CORE_P
412 sim_core_map_detach (SIM_DESC sd,
413 sim_core_map *access_map,
418 sim_core_mapping **entry;
419 for (entry = &access_map->first;
421 entry = &(*entry)->next)
423 if ((*entry)->base == addr
424 && (*entry)->level == level
425 && (*entry)->space == space)
427 sim_core_mapping *dead = (*entry);
428 (*entry) = dead->next;
429 if (dead->free_buffer != NULL)
430 zfree (dead->free_buffer);
438 #if EXTERN_SIM_CORE_P
440 sim_core_detach (SIM_DESC sd,
446 sim_core *memory = STATE_CORE (sd);
448 for (map = 0; map < nr_maps; map++)
450 sim_core_map_detach (sd, &memory->common.map[map],
451 level, address_space, addr);
453 /* Just copy this update to each of the processor specific data
454 structures. FIXME - later this will be replaced by true
455 processor specific maps. */
458 for (i = 0; i < MAX_NR_PROCESSORS; i++)
460 CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
467 STATIC_INLINE_SIM_CORE\
469 sim_core_find_mapping(sim_core_common *core,
473 transfer_type transfer,
474 int abort, /*either 0 or 1 - hint to inline/-O */
475 sim_cpu *cpu, /* abort => cpu != NULL */
478 sim_core_mapping *mapping = core->map[map].first;
479 ASSERT ((addr & (nr_bytes - 1)) == 0); /* must be aligned */
480 ASSERT ((addr + (nr_bytes - 1)) >= addr); /* must not wrap */
481 ASSERT (!abort || cpu != NULL); /* abort needs a non null CPU */
482 while (mapping != NULL)
484 if (addr >= mapping->base
485 && (addr + (nr_bytes - 1)) <= mapping->bound)
487 mapping = mapping->next;
491 SIM_CORE_SIGNAL (CPU_STATE (cpu), cpu, cia, map, nr_bytes, addr, transfer,
492 sim_core_unmapped_signal);
498 STATIC_INLINE_SIM_CORE\
500 sim_core_translate (sim_core_mapping *mapping,
503 if (WITH_MODULO_MEMORY)
504 return (void *)((unsigned8 *) mapping->buffer
505 + ((addr - mapping->base) & mapping->mask));
507 return (void *)((unsigned8 *) mapping->buffer
508 + addr - mapping->base);
512 #if EXTERN_SIM_CORE_P
514 sim_core_read_buffer (SIM_DESC sd,
521 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
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)
536 int nr_bytes = len - count;
537 if (raddr + nr_bytes - 1> mapping->bound)
538 nr_bytes = mapping->bound - raddr + 1;
539 if (device_io_read_buffer (mapping->device,
540 (unsigned_1*)buffer + count,
545 CIA_GET (cpu)) != nr_bytes)
552 if (mapping->device != NULL)
554 int nr_bytes = len - count;
555 if (raddr + nr_bytes - 1> mapping->bound)
556 nr_bytes = mapping->bound - raddr + 1;
557 if (sim_hw_io_read_buffer (sd, mapping->device,
558 (unsigned_1*)buffer + count,
561 nr_bytes) != nr_bytes)
567 ((unsigned_1*)buffer)[count] =
568 *(unsigned_1*)sim_core_translate(mapping, raddr);
576 #if EXTERN_SIM_CORE_P
578 sim_core_write_buffer (SIM_DESC sd,
585 sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
589 unsigned_word raddr = addr + count;
590 sim_core_mapping *mapping =
591 sim_core_find_mapping (core, map,
592 raddr, /*nr-bytes*/1,
594 0 /*dont-abort*/, NULL, NULL_CIA);
598 if (WITH_CALLBACK_MEMORY
599 && mapping->device != NULL)
601 int nr_bytes = len - count;
602 if (raddr + nr_bytes - 1 > mapping->bound)
603 nr_bytes = mapping->bound - raddr + 1;
604 if (device_io_write_buffer (mapping->device,
605 (unsigned_1*)buffer + count,
610 CIA_GET(cpu)) != nr_bytes)
617 if (WITH_CALLBACK_MEMORY
618 && mapping->device != NULL)
620 int nr_bytes = len - count;
621 if (raddr + nr_bytes - 1 > mapping->bound)
622 nr_bytes = mapping->bound - raddr + 1;
623 if (sim_hw_io_write_buffer (sd, mapping->device,
624 (unsigned_1*)buffer + count,
627 nr_bytes) != nr_bytes)
633 *(unsigned_1*)sim_core_translate(mapping, raddr) =
634 ((unsigned_1*)buffer)[count];
642 #if EXTERN_SIM_CORE_P
644 sim_core_set_xor (SIM_DESC sd,
648 /* set up the XOR map if required. */
649 if (WITH_XOR_ENDIAN) {
651 sim_core *core = STATE_CORE (sd);
652 sim_cpu_core *cpu_core = (cpu != NULL ? CPU_CORE (cpu) : NULL);
653 if (cpu_core != NULL)
658 mask = WITH_XOR_ENDIAN - 1;
661 while (i - 1 < WITH_XOR_ENDIAN)
663 cpu_core->xor[i-1] = mask;
664 mask = (mask << 1) & (WITH_XOR_ENDIAN - 1);
671 core->byte_xor = WITH_XOR_ENDIAN - 1;
679 sim_engine_abort (sd, NULL, NULL_CIA,
680 "Attempted to enable xor-endian mode when permenantly disabled.");
686 #if EXTERN_SIM_CORE_P
688 reverse_n (unsigned_1 *dest,
689 const unsigned_1 *src,
693 for (i = 0; i < nr_bytes; i++)
695 dest [nr_bytes - i - 1] = src [i];
701 #if EXTERN_SIM_CORE_P
703 sim_core_xor_read_buffer (SIM_DESC sd,
710 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
711 if (!WITH_XOR_ENDIAN || !byte_xor)
712 return sim_core_read_buffer (sd, cpu, map, buffer, addr, nr_bytes);
714 /* only break up transfers when xor-endian is both selected and enabled */
716 unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero-sized array */
717 unsigned nr_transfered = 0;
718 address_word start = addr;
719 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
721 /* initial and intermediate transfers are broken when they cross
722 an XOR endian boundary */
723 while (nr_transfered + nr_this_transfer < nr_bytes)
724 /* initial/intermediate transfers */
726 /* since xor-endian is enabled stop^xor defines the start
727 address of the transfer */
728 stop = start + nr_this_transfer - 1;
729 SIM_ASSERT (start <= stop);
730 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
731 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
733 return nr_transfered;
734 reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
735 nr_transfered += nr_this_transfer;
736 nr_this_transfer = WITH_XOR_ENDIAN;
740 nr_this_transfer = nr_bytes - nr_transfered;
741 stop = start + nr_this_transfer - 1;
742 SIM_ASSERT (stop == (addr + nr_bytes - 1));
743 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
745 return nr_transfered;
746 reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
753 #if EXTERN_SIM_CORE_P
755 sim_core_xor_write_buffer (SIM_DESC sd,
762 address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
763 if (!WITH_XOR_ENDIAN || !byte_xor)
764 return sim_core_write_buffer (sd, cpu, map, buffer, addr, nr_bytes);
766 /* only break up transfers when xor-endian is both selected and enabled */
768 unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero sized array */
769 unsigned nr_transfered = 0;
770 address_word start = addr;
771 unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
773 /* initial and intermediate transfers are broken when they cross
774 an XOR endian boundary */
775 while (nr_transfered + nr_this_transfer < nr_bytes)
776 /* initial/intermediate transfers */
778 /* since xor-endian is enabled stop^xor defines the start
779 address of the transfer */
780 stop = start + nr_this_transfer - 1;
781 SIM_ASSERT (start <= stop);
782 SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
783 reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
784 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
786 return nr_transfered;
787 nr_transfered += nr_this_transfer;
788 nr_this_transfer = WITH_XOR_ENDIAN;
792 nr_this_transfer = nr_bytes - nr_transfered;
793 stop = start + nr_this_transfer - 1;
794 SIM_ASSERT (stop == (addr + nr_bytes - 1));
795 reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
796 if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
798 return nr_transfered;
806 /* define the read/write 1/2/4/8/16/word functions */
809 #include "sim-n-core.h"
812 #include "sim-n-core.h"
816 #include "sim-n-core.h"
820 #include "sim-n-core.h"
824 #include "sim-n-core.h"
827 #include "sim-n-core.h"
831 #include "sim-n-core.h"
834 #include "sim-n-core.h"
837 #include "sim-n-core.h"