774 lines
20 KiB
C
774 lines
20 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef _SIM_CORE_C_
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#define _SIM_CORE_C_
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#include "sim-main.h"
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#include "sim-assert.h"
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/* "core" module install handler.
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This is called via sim_module_install to install the "core" subsystem
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into the simulator. */
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static MODULE_INIT_FN sim_core_init;
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static MODULE_UNINSTALL_FN sim_core_uninstall;
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EXTERN_SIM_CORE\
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(SIM_RC)
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sim_core_install (SIM_DESC sd)
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{
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SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
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/* establish the other handlers */
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sim_module_add_uninstall_fn (sd, sim_core_uninstall);
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sim_module_add_init_fn (sd, sim_core_init);
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/* establish any initial data structures - none */
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return SIM_RC_OK;
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}
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/* Uninstall the "core" subsystem from the simulator. */
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STATIC_SIM_CORE\
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(void)
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sim_core_uninstall (SIM_DESC sd)
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{
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sim_core *core = STATE_CORE(sd);
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sim_core_maps map;
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/* blow away any mappings */
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for (map = 0; map < nr_sim_core_maps; map++) {
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sim_core_mapping *curr = core->common.map[map].first;
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while (curr != NULL) {
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sim_core_mapping *tbd = curr;
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curr = curr->next;
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if (tbd->free_buffer) {
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SIM_ASSERT(tbd->buffer != NULL);
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zfree(tbd->buffer);
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}
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zfree(tbd);
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}
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core->common.map[map].first = NULL;
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}
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}
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STATIC_SIM_CORE\
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(SIM_RC)
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sim_core_init (SIM_DESC sd)
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{
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/* Nothing to do */
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return SIM_RC_OK;
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}
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#ifndef SIM_CORE_SIGNAL
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#define SIM_CORE_SIGNAL(SD,CPU,CIA,MAP,NR_BYTES,ADDR,TRANSFER,ERROR) \
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sim_core_signal ((SD), (CPU), (CIA), (MAP), (NR_BYTES), (ADDR), (TRANSFER), (ERROR))
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STATIC_SIM_CORE\
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(void)
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sim_core_signal (SIM_DESC sd,
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sim_cpu *cpu,
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sim_cia cia,
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sim_core_maps map,
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int nr_bytes,
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address_word addr,
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transfer_type transfer,
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sim_core_signals sig)
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{
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const char *copy = (transfer == read_transfer ? "read" : "write");
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switch (sig)
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{
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case sim_core_unmapped_signal:
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sim_engine_abort (sd, cpu, cia, "sim-core: %d byte %s to unmaped address 0x%lx",
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nr_bytes, copy, (unsigned long) addr);
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break;
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case sim_core_unaligned_signal:
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sim_engine_abort (sd, cpu, cia, "sim-core: %d byte misaligned %s to address 0x%lx",
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nr_bytes, copy, (unsigned long) addr);
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break;
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default:
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sim_engine_abort (sd, cpu, cia, "sim_core_signal - internal error - bad switch");
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}
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}
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#endif
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STATIC_INLINE_SIM_CORE\
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(const char *)
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sim_core_map_to_str (sim_core_maps map)
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{
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switch (map)
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{
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case sim_core_read_map: return "read";
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case sim_core_write_map: return "write";
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case sim_core_execute_map: return "exec";
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default: return "(invalid-map)";
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}
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}
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STATIC_SIM_CORE\
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(sim_core_mapping *)
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new_sim_core_mapping (SIM_DESC sd,
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attach_type attach,
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int space,
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address_word addr,
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address_word nr_bytes,
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unsigned modulo,
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device *device,
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void *buffer,
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int free_buffer)
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{
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sim_core_mapping *new_mapping = ZALLOC(sim_core_mapping);
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/* common */
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new_mapping->level = attach;
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new_mapping->space = space;
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new_mapping->base = addr;
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new_mapping->nr_bytes = nr_bytes;
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new_mapping->bound = addr + (nr_bytes - 1);
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if (modulo == 0)
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new_mapping->mask = (unsigned) 0 - 1;
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else
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new_mapping->mask = modulo - 1;
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if (attach == attach_raw_memory)
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{
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new_mapping->buffer = buffer;
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new_mapping->free_buffer = free_buffer;
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}
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else if (attach >= attach_callback)
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{
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new_mapping->device = device;
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}
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else {
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sim_io_error (sd, "new_sim_core_mapping - internal error - unknown attach type %d\n",
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attach);
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}
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return new_mapping;
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}
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STATIC_SIM_CORE\
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(void)
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sim_core_map_attach (SIM_DESC sd,
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sim_core_map *access_map,
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attach_type attach,
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int space,
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address_word addr,
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address_word nr_bytes,
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unsigned modulo,
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device *client, /*callback/default*/
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void *buffer, /*raw_memory*/
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int free_buffer) /*raw_memory*/
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{
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/* find the insertion point for this additional mapping and then
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insert */
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sim_core_mapping *next_mapping;
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sim_core_mapping **last_mapping;
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SIM_ASSERT ((attach >= attach_callback)
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<= (client != NULL && buffer == NULL && !free_buffer));
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SIM_ASSERT ((attach == attach_raw_memory)
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<= (client == NULL && buffer != NULL));
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/* actually do occasionally get a zero size map */
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if (nr_bytes == 0)
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{
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#if (WITH_DEVICES)
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device_error(client, "called on sim_core_map_attach with size zero");
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#else
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sim_io_error (sd, "called on sim_core_map_attach with size zero");
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#endif
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}
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/* find the insertion point (between last/next) */
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next_mapping = access_map->first;
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last_mapping = &access_map->first;
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while(next_mapping != NULL
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&& (next_mapping->level < (int) attach
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|| (next_mapping->level == (int) attach
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&& next_mapping->bound < addr)))
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{
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/* provided levels are the same */
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/* assert: next_mapping->base > all bases before next_mapping */
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/* assert: next_mapping->bound >= all bounds before next_mapping */
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last_mapping = &next_mapping->next;
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next_mapping = next_mapping->next;
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}
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/* check insertion point correct */
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SIM_ASSERT (next_mapping == NULL || next_mapping->level >= (int) attach);
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if (next_mapping != NULL && next_mapping->level == (int) attach
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&& next_mapping->base < (addr + (nr_bytes - 1)))
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{
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#if (WITH_DEVICES)
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device_error (client, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
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space,
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(long) addr,
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(long) nr_bytes,
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(long) (addr + (nr_bytes - 1)),
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next_mapping->space,
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(long) next_mapping->base,
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(long) next_mapping->bound,
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(long) next_mapping->nr_bytes);
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#else
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sim_io_error (sd, "memory map %d:0x%lx..0x%lx (%ld bytes) overlaps %d:0x%lx..0x%lx (%ld bytes)",
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space,
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(long) addr,
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(long) nr_bytes,
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(long) (addr + (nr_bytes - 1)),
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next_mapping->space,
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(long) next_mapping->base,
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(long) next_mapping->bound,
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(long) next_mapping->nr_bytes);
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#endif
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}
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/* create/insert the new mapping */
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*last_mapping = new_sim_core_mapping(sd,
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attach,
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space, addr, nr_bytes, modulo,
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client, buffer, free_buffer);
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(*last_mapping)->next = next_mapping;
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}
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EXTERN_SIM_CORE\
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(void)
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sim_core_attach (SIM_DESC sd,
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sim_cpu *cpu,
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attach_type attach,
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access_type access,
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int space,
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address_word addr,
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address_word nr_bytes,
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unsigned modulo,
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device *client,
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void *optional_buffer)
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{
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sim_core *memory = STATE_CORE(sd);
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sim_core_maps map;
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void *buffer;
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int buffer_freed;
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/* check for for attempt to use unimplemented per-processor core map */
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if (cpu != NULL)
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sim_io_error (sd, "sim_core_map_attach - processor specific memory map not yet supported");
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if ((access & access_read_write_exec) == 0
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|| (access & ~access_read_write_exec) != 0)
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{
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#if (WITH_DEVICES)
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device_error(client, "invalid access for core attach");
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#else
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sim_io_error (sd, "invalid access for core attach");
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#endif
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}
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/* verify the attach type */
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if (attach == attach_raw_memory)
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{
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if (WITH_MODULO_MEMORY && modulo != 0)
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{
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unsigned mask = modulo - 1;
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if (mask < 7) /* 8 is minimum modulo */
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mask = 0;
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while (mask > 1) /* no zero bits */
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{
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if ((mask & 1) == 0)
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mask = 0;
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else
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mask >>= 1;
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}
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if (mask == 0)
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{
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#if (WITH_DEVICES)
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device_error (client, "sim_core_attach - internal error - modulo not power of two");
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#else
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sim_io_error (sd, "sim_core_attach - internal error - modulo not power of two");
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#endif
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}
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}
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else if (!WITH_MODULO_MEMORY && modulo != 0)
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{
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#if (WITH_DEVICES)
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device_error (client, "sim_core_attach - internal error - modulo memory disabled");
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#else
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sim_io_error (sd, "sim_core_attach - internal error - modulo memory disabled");
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#endif
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}
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if (optional_buffer == NULL)
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{
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buffer = zalloc (modulo == 0 ? nr_bytes : modulo);
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buffer_freed = 0;
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}
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else
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{
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buffer = optional_buffer;
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buffer_freed = 1;
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}
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}
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else if (attach >= attach_callback)
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{
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buffer = NULL;
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buffer_freed = 1;
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}
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else
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{
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#if (WITH_DEVICES)
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device_error (client, "sim_core_attach - internal error - conflicting buffer and attach arguments");
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#else
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sim_io_error (sd, "sim_core_attach - internal error - conflicting buffer and attach arguments");
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#endif
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buffer = NULL;
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buffer_freed = 1;
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}
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/* attach the region to all applicable access maps */
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for (map = 0;
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map < nr_sim_core_maps;
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map++)
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{
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switch (map)
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{
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case sim_core_read_map:
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if (access & access_read)
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sim_core_map_attach (sd, &memory->common.map[map],
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attach,
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space, addr, nr_bytes, modulo,
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client, buffer, !buffer_freed);
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buffer_freed ++;
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break;
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case sim_core_write_map:
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if (access & access_write)
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sim_core_map_attach (sd, &memory->common.map[map],
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attach,
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space, addr, nr_bytes, modulo,
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client, buffer, !buffer_freed);
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buffer_freed ++;
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break;
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case sim_core_execute_map:
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if (access & access_exec)
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sim_core_map_attach (sd, &memory->common.map[map],
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attach,
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space, addr, nr_bytes, modulo,
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client, buffer, !buffer_freed);
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buffer_freed ++;
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break;
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case nr_sim_core_maps:
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sim_io_error (sd, "sim_core_attach - internal error - bad switch");
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break;
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}
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}
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/* Just copy this map to each of the processor specific data structures.
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FIXME - later this will be replaced by true processor specific
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maps. */
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{
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int i;
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for (i = 0; i < MAX_NR_PROCESSORS; i++)
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{
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CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
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}
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}
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}
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/* Remove any memory reference related to this address */
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STATIC_INLINE_SIM_CORE\
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(void)
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sim_core_map_detach (SIM_DESC sd,
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sim_core_map *access_map,
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attach_type attach,
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int space,
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address_word addr)
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{
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sim_core_mapping **entry;
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for (entry = &access_map->first;
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(*entry) != NULL;
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entry = &(*entry)->next)
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{
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if ((*entry)->base == addr
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&& (*entry)->level == (int) attach
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&& (*entry)->space == space)
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{
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sim_core_mapping *dead = (*entry);
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(*entry) = dead->next;
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if (dead->free_buffer)
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zfree (dead->buffer);
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zfree (dead);
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return;
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}
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}
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}
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EXTERN_SIM_CORE\
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(void)
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sim_core_detach (SIM_DESC sd,
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sim_cpu *cpu,
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attach_type attach,
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int address_space,
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address_word addr)
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{
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sim_core *memory = STATE_CORE (sd);
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sim_core_maps map;
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for (map = 0; map < nr_sim_core_maps; map++)
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{
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sim_core_map_detach (sd, &memory->common.map[map],
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attach, address_space, addr);
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}
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/* Just copy this update to each of the processor specific data
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structures. FIXME - later this will be replaced by true
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processor specific maps. */
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{
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int i;
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for (i = 0; i < MAX_NR_PROCESSORS; i++)
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{
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CPU_CORE (STATE_CPU (sd, i))->common = STATE_CORE (sd)->common;
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}
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}
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}
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STATIC_INLINE_SIM_CORE\
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(sim_core_mapping *)
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sim_core_find_mapping(sim_core_common *core,
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sim_core_maps map,
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address_word addr,
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unsigned nr_bytes,
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transfer_type transfer,
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int abort, /*either 0 or 1 - hint to inline/-O */
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sim_cpu *cpu, /* abort => cpu != NULL */
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sim_cia cia)
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{
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sim_core_mapping *mapping = core->map[map].first;
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ASSERT ((addr & (nr_bytes - 1)) == 0); /* must be aligned */
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ASSERT ((addr + (nr_bytes - 1)) >= addr); /* must not wrap */
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ASSERT (!abort || cpu != NULL); /* abort needs a non null CPU */
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while (mapping != NULL)
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{
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if (addr >= mapping->base
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&& (addr + (nr_bytes - 1)) <= mapping->bound)
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return mapping;
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mapping = mapping->next;
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}
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if (abort)
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{
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SIM_CORE_SIGNAL (CPU_STATE (cpu), cpu, cia, map, nr_bytes, addr, transfer,
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sim_core_unmapped_signal);
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}
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return NULL;
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}
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STATIC_INLINE_SIM_CORE\
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(void *)
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sim_core_translate (sim_core_mapping *mapping,
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address_word addr)
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{
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if (WITH_MODULO_MEMORY)
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return (void *)((unsigned8 *) mapping->buffer
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+ ((addr - mapping->base) & mapping->mask));
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else
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return (void *)((unsigned8 *) mapping->buffer
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+ addr - mapping->base);
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}
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EXTERN_SIM_CORE\
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(unsigned)
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sim_core_read_buffer (SIM_DESC sd,
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sim_cpu *cpu,
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sim_core_maps map,
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void *buffer,
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address_word addr,
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unsigned len)
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{
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sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
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unsigned count = 0;
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while (count < len) {
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unsigned_word raddr = addr + count;
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sim_core_mapping *mapping =
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sim_core_find_mapping(core, map,
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raddr, /*nr-bytes*/1,
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read_transfer,
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0 /*dont-abort*/, NULL, NULL_CIA);
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if (mapping == NULL)
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break;
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#if (WITH_DEVICES)
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if (mapping->device != NULL) {
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int nr_bytes = len - count;
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if (raddr + nr_bytes - 1> mapping->bound)
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nr_bytes = mapping->bound - raddr + 1;
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if (device_io_read_buffer(mapping->device,
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(unsigned_1*)buffer + count,
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mapping->space,
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raddr,
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nr_bytes) != nr_bytes)
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break;
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count += nr_bytes;
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}
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else
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#endif
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{
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((unsigned_1*)buffer)[count] =
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*(unsigned_1*)sim_core_translate(mapping, raddr);
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count += 1;
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}
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}
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return count;
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}
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EXTERN_SIM_CORE\
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(unsigned)
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sim_core_write_buffer (SIM_DESC sd,
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|
sim_cpu *cpu,
|
|
sim_core_maps map,
|
|
const void *buffer,
|
|
address_word addr,
|
|
unsigned len)
|
|
{
|
|
sim_core_common *core = (cpu == NULL ? &STATE_CORE (sd)->common : &CPU_CORE (cpu)->common);
|
|
unsigned count = 0;
|
|
while (count < len) {
|
|
unsigned_word raddr = addr + count;
|
|
sim_core_mapping *mapping =
|
|
sim_core_find_mapping(core, map,
|
|
raddr, /*nr-bytes*/1,
|
|
write_transfer,
|
|
0 /*dont-abort*/, NULL, NULL_CIA);
|
|
if (mapping == NULL)
|
|
break;
|
|
#if (WITH_DEVICES)
|
|
if (WITH_CALLBACK_MEMORY
|
|
&& mapping->device != NULL) {
|
|
int nr_bytes = len - count;
|
|
if (raddr + nr_bytes - 1 > mapping->bound)
|
|
nr_bytes = mapping->bound - raddr + 1;
|
|
if (device_io_write_buffer(mapping->device,
|
|
(unsigned_1*)buffer + count,
|
|
mapping->space,
|
|
raddr,
|
|
nr_bytes) != nr_bytes)
|
|
break;
|
|
count += nr_bytes;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
*(unsigned_1*)sim_core_translate(mapping, raddr) =
|
|
((unsigned_1*)buffer)[count];
|
|
count += 1;
|
|
}
|
|
}
|
|
return count;
|
|
}
|
|
|
|
|
|
EXTERN_SIM_CORE\
|
|
(void)
|
|
sim_core_set_xor (SIM_DESC sd,
|
|
sim_cpu *cpu,
|
|
int is_xor)
|
|
{
|
|
/* set up the XOR map if required. */
|
|
if (WITH_XOR_ENDIAN) {
|
|
{
|
|
sim_core *core = STATE_CORE (sd);
|
|
sim_cpu_core *cpu_core = (cpu != NULL ? CPU_CORE (cpu) : NULL);
|
|
if (cpu_core != NULL)
|
|
{
|
|
int i = 1;
|
|
unsigned mask;
|
|
if (is_xor)
|
|
mask = WITH_XOR_ENDIAN - 1;
|
|
else
|
|
mask = 0;
|
|
while (i - 1 < WITH_XOR_ENDIAN)
|
|
{
|
|
cpu_core->xor[i-1] = mask;
|
|
mask = (mask << 1) & (WITH_XOR_ENDIAN - 1);
|
|
i = (i << 1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (is_xor)
|
|
core->byte_xor = WITH_XOR_ENDIAN - 1;
|
|
else
|
|
core->byte_xor = 0;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if (is_xor)
|
|
sim_engine_abort (sd, cpu, NULL_CIA,
|
|
"Attempted to enable xor-endian mode when permenantly disabled.");
|
|
}
|
|
}
|
|
|
|
STATIC_INLINE_SIM_CORE\
|
|
(void)
|
|
reverse_n (unsigned_1 *dest,
|
|
const unsigned_1 *src,
|
|
int nr_bytes)
|
|
{
|
|
int i;
|
|
for (i = 0; i < nr_bytes; i++)
|
|
{
|
|
dest [nr_bytes - i - 1] = src [i];
|
|
}
|
|
}
|
|
|
|
|
|
EXTERN_SIM_CORE\
|
|
(unsigned)
|
|
sim_core_xor_read_buffer (SIM_DESC sd,
|
|
sim_cpu *cpu,
|
|
sim_core_maps map,
|
|
void *buffer,
|
|
address_word addr,
|
|
unsigned nr_bytes)
|
|
{
|
|
address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
|
|
if (!WITH_XOR_ENDIAN || !byte_xor)
|
|
return sim_core_read_buffer (sd, cpu, map, buffer, addr, nr_bytes);
|
|
else
|
|
/* only break up transfers when xor-endian is both selected and enabled */
|
|
{
|
|
unsigned_1 x[WITH_XOR_ENDIAN + 1]; /* +1 to avoid zero-sized array */
|
|
unsigned nr_transfered = 0;
|
|
address_word start = addr;
|
|
unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
|
|
address_word stop;
|
|
/* initial and intermediate transfers are broken when they cross
|
|
an XOR endian boundary */
|
|
while (nr_transfered + nr_this_transfer < nr_bytes)
|
|
/* initial/intermediate transfers */
|
|
{
|
|
/* since xor-endian is enabled stop^xor defines the start
|
|
address of the transfer */
|
|
stop = start + nr_this_transfer - 1;
|
|
SIM_ASSERT (start <= stop);
|
|
SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
|
|
if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
|
|
!= nr_this_transfer)
|
|
return nr_transfered;
|
|
reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
|
|
nr_transfered += nr_this_transfer;
|
|
nr_this_transfer = WITH_XOR_ENDIAN;
|
|
start = stop + 1;
|
|
}
|
|
/* final transfer */
|
|
nr_this_transfer = nr_bytes - nr_transfered;
|
|
stop = start + nr_this_transfer - 1;
|
|
SIM_ASSERT (stop == (addr + nr_bytes - 1));
|
|
if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
|
|
!= nr_this_transfer)
|
|
return nr_transfered;
|
|
reverse_n (&((unsigned_1*)buffer)[nr_transfered], x, nr_this_transfer);
|
|
return nr_bytes;
|
|
}
|
|
}
|
|
|
|
|
|
EXTERN_SIM_CORE\
|
|
(unsigned)
|
|
sim_core_xor_write_buffer (SIM_DESC sd,
|
|
sim_cpu *cpu,
|
|
sim_core_maps map,
|
|
const void *buffer,
|
|
address_word addr,
|
|
unsigned nr_bytes)
|
|
{
|
|
address_word byte_xor = (cpu == NULL ? STATE_CORE (sd)->byte_xor : CPU_CORE (cpu)->xor[0]);
|
|
if (!WITH_XOR_ENDIAN || !byte_xor)
|
|
return sim_core_write_buffer (sd, cpu, map, buffer, addr, nr_bytes);
|
|
else
|
|
/* only break up transfers when xor-endian is both selected and enabled */
|
|
{
|
|
unsigned_1 x[WITH_XOR_ENDIAN];
|
|
unsigned nr_transfered = 0;
|
|
address_word start = addr;
|
|
unsigned nr_this_transfer = (WITH_XOR_ENDIAN - (addr & ~(WITH_XOR_ENDIAN - 1)));
|
|
address_word stop;
|
|
/* initial and intermediate transfers are broken when they cross
|
|
an XOR endian boundary */
|
|
while (nr_transfered + nr_this_transfer < nr_bytes)
|
|
/* initial/intermediate transfers */
|
|
{
|
|
/* since xor-endian is enabled stop^xor defines the start
|
|
address of the transfer */
|
|
stop = start + nr_this_transfer - 1;
|
|
SIM_ASSERT (start <= stop);
|
|
SIM_ASSERT ((stop ^ byte_xor) <= (start ^ byte_xor));
|
|
reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
|
|
if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
|
|
!= nr_this_transfer)
|
|
return nr_transfered;
|
|
nr_transfered += nr_this_transfer;
|
|
nr_this_transfer = WITH_XOR_ENDIAN;
|
|
start = stop + 1;
|
|
}
|
|
/* final transfer */
|
|
nr_this_transfer = nr_bytes - nr_transfered;
|
|
stop = start + nr_this_transfer - 1;
|
|
SIM_ASSERT (stop == (addr + nr_bytes - 1));
|
|
reverse_n (x, &((unsigned_1*)buffer)[nr_transfered], nr_this_transfer);
|
|
if (sim_core_read_buffer (sd, cpu, map, x, stop ^ byte_xor, nr_this_transfer)
|
|
!= nr_this_transfer)
|
|
return nr_transfered;
|
|
return nr_bytes;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/* define the read/write 1/2/4/8/word functions */
|
|
|
|
#define N 1
|
|
#include "sim-n-core.h"
|
|
#undef N
|
|
|
|
#define N 2
|
|
#include "sim-n-core.h"
|
|
#undef N
|
|
|
|
#define N 4
|
|
#include "sim-n-core.h"
|
|
#undef N
|
|
|
|
#define N 8
|
|
#include "sim-n-core.h"
|
|
#undef N
|
|
|
|
#define N word
|
|
#include "sim-n-core.h"
|
|
#undef N
|
|
|
|
#endif
|