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/* |
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* Copyright (C) 2003-2006 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: machine.c,v 1.679 2006/07/16 13:32:25 debug Exp $ |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <time.h> |
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#include <unistd.h> |
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|
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#include "arcbios.h" |
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#include "bus_isa.h" |
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#include "bus_pci.h" |
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#include "cpu.h" |
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#include "debugger.h" |
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#include "device.h" |
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#include "devices.h" |
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#include "diskimage.h" |
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#include "emul.h" |
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#include "machine.h" |
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#include "machine_interrupts.h" |
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#include "memory.h" |
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#include "misc.h" |
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#include "net.h" |
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#include "symbol.h" |
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|
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|
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/* See main.c: */ |
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extern int quiet_mode; |
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extern int verbose; |
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|
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|
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/* This is initialized by machine_init(): */ |
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struct machine_entry *first_machine_entry = NULL; |
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|
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|
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/* |
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* machine_new(): |
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* |
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* Returns a reasonably initialized struct machine. |
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*/ |
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struct machine *machine_new(char *name, struct emul *emul) |
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{ |
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struct machine *m; |
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m = malloc(sizeof(struct machine)); |
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if (m == NULL) { |
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fprintf(stderr, "machine_new(): out of memory\n"); |
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exit(1); |
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} |
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|
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memset(m, 0, sizeof(struct machine)); |
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|
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/* Back pointer: */ |
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m->emul = emul; |
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|
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m->name = strdup(name); |
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|
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/* Sane default values: */ |
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m->serial_nr = 1; |
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m->machine_type = MACHINE_NONE; |
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m->machine_subtype = MACHINE_NONE; |
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m->arch_pagesize = 4096; /* Should be overriden in |
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emul.c for other pagesizes. */ |
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m->prom_emulation = 1; |
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m->allow_instruction_combinations = 1; |
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m->byte_order_override = NO_BYTE_ORDER_OVERRIDE; |
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m->boot_kernel_filename = ""; |
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m->boot_string_argument = NULL; |
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m->automatic_clock_adjustment = 1; |
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m->x11_scaledown = 1; |
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m->x11_scaleup = 1; |
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m->n_gfx_cards = 1; |
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m->dbe_on_nonexistant_memaccess = 1; |
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m->show_symbolic_register_names = 1; |
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symbol_init(&m->symbol_context); |
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|
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return m; |
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} |
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|
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|
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/* |
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* machine_name_to_type(): |
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* |
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* Take a type and a subtype as strings, and convert them into numeric |
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* values used internally throughout the code. |
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* |
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* Return value is 1 on success, 0 if there was no match. |
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* Also, any errors/warnings are printed using fatal()/debug(). |
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*/ |
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int machine_name_to_type(char *stype, char *ssubtype, |
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int *type, int *subtype, int *arch) |
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{ |
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struct machine_entry *me; |
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int i, j, k, nmatches = 0; |
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|
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*type = MACHINE_NONE; |
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*subtype = 0; |
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|
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/* Check stype, and optionally ssubtype: */ |
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me = first_machine_entry; |
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while (me != NULL) { |
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for (i=0; i<me->n_aliases; i++) |
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if (strcasecmp(me->aliases[i], stype) == 0) { |
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/* Found a type: */ |
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*type = me->machine_type; |
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*arch = me->arch; |
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|
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if (me->n_subtypes == 0) |
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return 1; |
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|
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/* Check for subtype: */ |
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for (j=0; j<me->n_subtypes; j++) |
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for (k=0; k<me->subtype[j]->n_aliases; |
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k++) |
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if (strcasecmp(ssubtype, |
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me->subtype[j]->aliases[k] |
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) == 0) { |
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*subtype = me->subtype[ |
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j]->machine_subtype; |
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return 1; |
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} |
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|
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fatal("Unknown subtype '%s' for emulation" |
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" '%s'\n", ssubtype, stype); |
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if (!ssubtype[0]) |
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fatal("(Maybe you forgot the -e" |
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" command line option?)\n"); |
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exit(1); |
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} |
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|
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me = me->next; |
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} |
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|
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/* Not found? Then just check ssubtype: */ |
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me = first_machine_entry; |
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while (me != NULL) { |
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if (me->n_subtypes == 0) { |
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me = me->next; |
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continue; |
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} |
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|
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/* Check for subtype: */ |
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for (j=0; j<me->n_subtypes; j++) |
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for (k=0; k<me->subtype[j]->n_aliases; k++) |
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if (strcasecmp(ssubtype, me->subtype[j]-> |
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aliases[k]) == 0) { |
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*type = me->machine_type; |
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*arch = me->arch; |
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*subtype = me->subtype[j]-> |
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machine_subtype; |
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nmatches ++; |
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} |
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|
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me = me->next; |
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} |
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|
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switch (nmatches) { |
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case 0: fatal("\nSorry, emulation \"%s\"", stype); |
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if (ssubtype != NULL && ssubtype[0] != '\0') |
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fatal(" (subtype \"%s\")", ssubtype); |
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fatal(" is unknown.\n"); |
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break; |
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case 1: return 1; |
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default:fatal("\nSorry, multiple matches for \"%s\"", stype); |
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if (ssubtype != NULL && ssubtype[0] != '\0') |
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fatal(" (subtype \"%s\")", ssubtype); |
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fatal(".\n"); |
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} |
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|
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*type = MACHINE_NONE; |
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*subtype = 0; |
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|
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fatal("Use the -H command line option to get a list of " |
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"available types and subtypes.\n\n"); |
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|
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return 0; |
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} |
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|
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|
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/* |
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* machine_add_tickfunction(): |
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* |
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* Adds a tick function (a function called every now and then, depending on |
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* clock cycle count) to a machine. |
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* |
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* If tickshift is non-zero, a tick will occur every (1 << tickshift) cycles. |
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* This is used for the normal (fast dyntrans) emulation modes. |
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* |
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* If tickshift is zero, then this is a cycle-accurate tick function. |
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* The hz value is used in this case. |
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*/ |
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void machine_add_tickfunction(struct machine *machine, void (*func) |
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(struct cpu *, void *), void *extra, int tickshift, double hz) |
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{ |
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int n = machine->n_tick_entries; |
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|
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if (n >= MAX_TICK_FUNCTIONS) { |
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fprintf(stderr, "machine_add_tickfunction(): too " |
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"many tick functions\n"); |
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exit(1); |
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} |
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|
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if (!machine->cycle_accurate) { |
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/* |
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* The dyntrans subsystem wants to run code in relatively |
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* large chunks without checking for external interrupts, |
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* so we cannot allow too low tickshifts: |
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*/ |
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if (tickshift < N_SAFE_DYNTRANS_LIMIT_SHIFT) { |
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fatal("ERROR! tickshift = %i, less than " |
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"N_SAFE_DYNTRANS_LIMIT_SHIFT (%i)\n", |
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tickshift, N_SAFE_DYNTRANS_LIMIT_SHIFT); |
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exit(1); |
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} |
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} |
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|
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machine->ticks_till_next[n] = 0; |
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machine->ticks_reset_value[n] = 1 << tickshift; |
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machine->tick_func[n] = func; |
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machine->tick_extra[n] = extra; |
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machine->tick_hz[n] = hz; |
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|
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machine->n_tick_entries ++; |
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} |
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|
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|
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/* |
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* machine_statistics_init(): |
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* |
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* Initialize the parts of a machine struct that deal with instruction |
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* statistics gathering. |
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* |
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* Note: The fname argument contains "flags:filename". |
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*/ |
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void machine_statistics_init(struct machine *machine, char *fname) |
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{ |
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int n_fields = 0; |
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char *pcolon = fname; |
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char *mode = "a"; /* Append by default */ |
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|
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machine->allow_instruction_combinations = 0; |
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|
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if (machine->statistics_fields != NULL) { |
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fprintf(stderr, "Only one -s option is allowed.\n"); |
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exit(1); |
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} |
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|
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machine->statistics_fields = malloc(MAX_STATISTICS_FIELDS + 1); |
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machine->statistics_enabled = 1; |
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|
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while (*pcolon && *pcolon != ':') |
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pcolon ++; |
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|
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if (*pcolon != ':') { |
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fprintf(stderr, "The syntax for the -s option is: " |
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"-s flags:filename\nYou omitted the flags. Run g" |
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"xemul -h for a list of available flags.\n"); |
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exit(1); |
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} |
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|
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while (*fname != ':') { |
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switch (*fname) { |
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|
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/* Type flags: */ |
292 |
case 'v': |
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case 'i': |
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case 'p': |
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machine->statistics_fields[n_fields ++] = *fname; |
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if (n_fields >= MAX_STATISTICS_FIELDS) { |
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fprintf(stderr, "Internal error: Too many " |
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"statistics fields used. Increase " |
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"MAX_STATISTICS_FIELDS.\n"); |
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exit(1); |
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} |
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machine->statistics_fields[n_fields] = '\0'; |
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break; |
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|
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/* Optional flags: */ |
306 |
case 'o': |
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mode = "w"; |
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break; |
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case 'd': |
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machine->statistics_enabled = 0; |
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break; |
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|
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default:fprintf(stderr, "Unknown flag '%c' used with the" |
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" -s option. Aborting.\n", *fname); |
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exit(1); |
316 |
} |
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fname ++; |
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} |
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|
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fname ++; /* point to the filename after the colon */ |
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|
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machine->statistics_filename = strdup(fname); |
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machine->statistics_file = fopen(machine->statistics_filename, mode); |
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} |
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|
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|
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/* |
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* machine_bus_register(): |
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* |
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* Registers a bus in a machine. |
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*/ |
332 |
void machine_bus_register(struct machine *machine, char *busname, |
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void (*debug_dump)(void *), void *extra) |
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{ |
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struct machine_bus *tmp, *last = NULL, *new; |
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|
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new = zeroed_alloc(sizeof(struct machine_bus)); |
338 |
new->name = strdup(busname); |
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new->debug_dump = debug_dump; |
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new->extra = extra; |
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|
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/* Register last in the bus list: */ |
343 |
tmp = machine->first_bus; |
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while (tmp != NULL) { |
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last = tmp; |
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tmp = tmp->next; |
347 |
} |
348 |
|
349 |
if (last == NULL) |
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machine->first_bus = new; |
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else |
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last->next = new; |
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|
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machine->n_busses ++; |
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} |
356 |
|
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|
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/* |
359 |
* machine_dump_bus_info(): |
360 |
* |
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* Dumps info about registered busses. |
362 |
*/ |
363 |
void machine_dump_bus_info(struct machine *m) |
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{ |
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struct machine_bus *bus = m->first_bus; |
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int iadd = DEBUG_INDENTATION; |
367 |
|
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if (m->n_busses > 0) |
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debug("busses:\n"); |
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debug_indentation(iadd); |
371 |
while (bus != NULL) { |
372 |
bus->debug_dump(bus->extra); |
373 |
bus = bus->next; |
374 |
} |
375 |
debug_indentation(-iadd); |
376 |
} |
377 |
|
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|
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/* |
380 |
* machine_dumpinfo(): |
381 |
* |
382 |
* Dumps info about a machine in some kind of readable format. (Used by |
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* the 'machine' debugger command.) |
384 |
*/ |
385 |
void machine_dumpinfo(struct machine *m) |
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{ |
387 |
int i; |
388 |
|
389 |
debug("serial nr: %i", m->serial_nr); |
390 |
if (m->nr_of_nics > 0) |
391 |
debug(" (nr of NICs: %i)", m->nr_of_nics); |
392 |
debug("\n"); |
393 |
|
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debug("memory: %i MB", m->physical_ram_in_mb); |
395 |
if (m->memory_offset_in_mb != 0) |
396 |
debug(" (offset by %i MB)", m->memory_offset_in_mb); |
397 |
if (m->random_mem_contents) |
398 |
debug(", randomized contents"); |
399 |
if (m->dbe_on_nonexistant_memaccess) |
400 |
debug(", dbe_on_nonexistant_memaccess"); |
401 |
debug("\n"); |
402 |
|
403 |
debug("clock: "); |
404 |
if (m->automatic_clock_adjustment) |
405 |
debug("adjusted automatically"); |
406 |
else |
407 |
debug("fixed at %i Hz", m->emulated_hz); |
408 |
debug("\n"); |
409 |
|
410 |
if (!m->prom_emulation) |
411 |
debug("PROM emulation disabled\n"); |
412 |
|
413 |
for (i=0; i<m->ncpus; i++) |
414 |
cpu_dumpinfo(m, m->cpus[i]); |
415 |
|
416 |
if (m->ncpus > 1) |
417 |
debug("Bootstrap cpu is nr %i\n", m->bootstrap_cpu); |
418 |
|
419 |
if (m->slow_serial_interrupts_hack_for_linux) |
420 |
debug("Using slow_serial_interrupts_hack_for_linux\n"); |
421 |
|
422 |
if (m->use_x11) { |
423 |
debug("Using X11"); |
424 |
if (m->x11_scaledown > 1) |
425 |
debug(", scaledown %i", m->x11_scaledown); |
426 |
if (m->x11_scaleup > 1) |
427 |
debug(", scaleup %i", m->x11_scaleup); |
428 |
if (m->x11_n_display_names > 0) { |
429 |
for (i=0; i<m->x11_n_display_names; i++) { |
430 |
debug(i? ", " : " ("); |
431 |
debug("\"%s\"", m->x11_display_names[i]); |
432 |
} |
433 |
debug(")"); |
434 |
} |
435 |
debug("\n"); |
436 |
} |
437 |
|
438 |
machine_dump_bus_info(m); |
439 |
|
440 |
diskimage_dump_info(m); |
441 |
|
442 |
if (m->force_netboot) |
443 |
debug("Forced netboot\n"); |
444 |
} |
445 |
|
446 |
|
447 |
/* |
448 |
* dump_mem_string(): |
449 |
* |
450 |
* Dump the contents of emulated RAM as readable text. Bytes that aren't |
451 |
* readable are dumped in [xx] notation, where xx is in hexadecimal. |
452 |
* Dumping ends after DUMP_MEM_STRING_MAX bytes, or when a terminating |
453 |
* zero byte is found. |
454 |
*/ |
455 |
#define DUMP_MEM_STRING_MAX 45 |
456 |
void dump_mem_string(struct cpu *cpu, uint64_t addr) |
457 |
{ |
458 |
int i; |
459 |
for (i=0; i<DUMP_MEM_STRING_MAX; i++) { |
460 |
unsigned char ch = '\0'; |
461 |
|
462 |
cpu->memory_rw(cpu, cpu->mem, addr + i, &ch, sizeof(ch), |
463 |
MEM_READ, CACHE_DATA | NO_EXCEPTIONS); |
464 |
if (ch == '\0') |
465 |
return; |
466 |
if (ch >= ' ' && ch < 126) |
467 |
debug("%c", ch); |
468 |
else |
469 |
debug("[%02x]", ch); |
470 |
} |
471 |
} |
472 |
|
473 |
|
474 |
/* |
475 |
* store_byte(): |
476 |
* |
477 |
* Stores a byte in emulated ram. (Helper function.) |
478 |
*/ |
479 |
void store_byte(struct cpu *cpu, uint64_t addr, uint8_t data) |
480 |
{ |
481 |
if ((addr >> 32) == 0) |
482 |
addr = (int64_t)(int32_t)addr; |
483 |
cpu->memory_rw(cpu, cpu->mem, |
484 |
addr, &data, sizeof(data), MEM_WRITE, CACHE_DATA); |
485 |
} |
486 |
|
487 |
|
488 |
/* |
489 |
* store_string(): |
490 |
* |
491 |
* Stores chars into emulated RAM until a zero byte (string terminating |
492 |
* character) is found. The zero byte is also copied. |
493 |
* (strcpy()-like helper function, host-RAM-to-emulated-RAM.) |
494 |
*/ |
495 |
void store_string(struct cpu *cpu, uint64_t addr, char *s) |
496 |
{ |
497 |
do { |
498 |
store_byte(cpu, addr++, *s); |
499 |
} while (*s++); |
500 |
} |
501 |
|
502 |
|
503 |
/* |
504 |
* add_environment_string(): |
505 |
* |
506 |
* Like store_string(), but advances the pointer afterwards. The most |
507 |
* obvious use is to place a number of strings (such as environment variable |
508 |
* strings) after one-another in emulated memory. |
509 |
*/ |
510 |
void add_environment_string(struct cpu *cpu, char *s, uint64_t *addr) |
511 |
{ |
512 |
store_string(cpu, *addr, s); |
513 |
(*addr) += strlen(s) + 1; |
514 |
} |
515 |
|
516 |
|
517 |
/* |
518 |
* add_environment_string_dual(): |
519 |
* |
520 |
* Add "dual" environment strings, one for the variable name and one for the |
521 |
* value, and update pointers afterwards. |
522 |
*/ |
523 |
void add_environment_string_dual(struct cpu *cpu, |
524 |
uint64_t *ptrp, uint64_t *addrp, char *s1, char *s2) |
525 |
{ |
526 |
uint64_t ptr = *ptrp, addr = *addrp; |
527 |
|
528 |
store_32bit_word(cpu, ptr, addr); |
529 |
ptr += sizeof(uint32_t); |
530 |
if (addr != 0) { |
531 |
store_string(cpu, addr, s1); |
532 |
addr += strlen(s1) + 1; |
533 |
} |
534 |
store_32bit_word(cpu, ptr, addr); |
535 |
ptr += sizeof(uint32_t); |
536 |
if (addr != 0) { |
537 |
store_string(cpu, addr, s2); |
538 |
addr += strlen(s2) + 1; |
539 |
} |
540 |
|
541 |
*ptrp = ptr; |
542 |
*addrp = addr; |
543 |
} |
544 |
|
545 |
|
546 |
/* |
547 |
* store_64bit_word(): |
548 |
* |
549 |
* Stores a 64-bit word in emulated RAM. Byte order is taken into account. |
550 |
* Helper function. |
551 |
*/ |
552 |
int store_64bit_word(struct cpu *cpu, uint64_t addr, uint64_t data64) |
553 |
{ |
554 |
unsigned char data[8]; |
555 |
if ((addr >> 32) == 0) |
556 |
addr = (int64_t)(int32_t)addr; |
557 |
data[0] = (data64 >> 56) & 255; |
558 |
data[1] = (data64 >> 48) & 255; |
559 |
data[2] = (data64 >> 40) & 255; |
560 |
data[3] = (data64 >> 32) & 255; |
561 |
data[4] = (data64 >> 24) & 255; |
562 |
data[5] = (data64 >> 16) & 255; |
563 |
data[6] = (data64 >> 8) & 255; |
564 |
data[7] = (data64) & 255; |
565 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
566 |
int tmp = data[0]; data[0] = data[7]; data[7] = tmp; |
567 |
tmp = data[1]; data[1] = data[6]; data[6] = tmp; |
568 |
tmp = data[2]; data[2] = data[5]; data[5] = tmp; |
569 |
tmp = data[3]; data[3] = data[4]; data[4] = tmp; |
570 |
} |
571 |
return cpu->memory_rw(cpu, cpu->mem, |
572 |
addr, data, sizeof(data), MEM_WRITE, CACHE_DATA); |
573 |
} |
574 |
|
575 |
|
576 |
/* |
577 |
* store_32bit_word(): |
578 |
* |
579 |
* Stores a 32-bit word in emulated RAM. Byte order is taken into account. |
580 |
* (This function takes a 64-bit word as argument, to suppress some |
581 |
* warnings, but only the lowest 32 bits are used.) |
582 |
*/ |
583 |
int store_32bit_word(struct cpu *cpu, uint64_t addr, uint64_t data32) |
584 |
{ |
585 |
unsigned char data[4]; |
586 |
if (cpu->machine->arch == ARCH_MIPS && (addr >> 32) == 0) |
587 |
addr = (int64_t)(int32_t)addr; |
588 |
data[0] = (data32 >> 24) & 255; |
589 |
data[1] = (data32 >> 16) & 255; |
590 |
data[2] = (data32 >> 8) & 255; |
591 |
data[3] = (data32) & 255; |
592 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
593 |
int tmp = data[0]; data[0] = data[3]; data[3] = tmp; |
594 |
tmp = data[1]; data[1] = data[2]; data[2] = tmp; |
595 |
} |
596 |
return cpu->memory_rw(cpu, cpu->mem, |
597 |
addr, data, sizeof(data), MEM_WRITE, CACHE_DATA); |
598 |
} |
599 |
|
600 |
|
601 |
/* |
602 |
* store_16bit_word(): |
603 |
* |
604 |
* Stores a 16-bit word in emulated RAM. Byte order is taken into account. |
605 |
* (This function takes a 64-bit word as argument, to suppress some |
606 |
* warnings, but only the lowest 16 bits are used.) |
607 |
*/ |
608 |
int store_16bit_word(struct cpu *cpu, uint64_t addr, uint64_t data16) |
609 |
{ |
610 |
unsigned char data[2]; |
611 |
if (cpu->machine->arch == ARCH_MIPS && (addr >> 32) == 0) |
612 |
addr = (int64_t)(int32_t)addr; |
613 |
data[0] = (data16 >> 8) & 255; |
614 |
data[1] = (data16) & 255; |
615 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
616 |
int tmp = data[0]; data[0] = data[1]; data[1] = tmp; |
617 |
} |
618 |
return cpu->memory_rw(cpu, cpu->mem, |
619 |
addr, data, sizeof(data), MEM_WRITE, CACHE_DATA); |
620 |
} |
621 |
|
622 |
|
623 |
/* |
624 |
* store_buf(): |
625 |
* |
626 |
* memcpy()-like helper function, from host RAM to emulated RAM. |
627 |
*/ |
628 |
void store_buf(struct cpu *cpu, uint64_t addr, char *s, size_t len) |
629 |
{ |
630 |
size_t psize = 1024; /* 1024 256 64 16 4 1 */ |
631 |
|
632 |
if (cpu->machine->arch == ARCH_MIPS && (addr >> 32) == 0) |
633 |
addr = (int64_t)(int32_t)addr; |
634 |
|
635 |
while (len != 0) { |
636 |
if ((addr & (psize-1)) == 0) { |
637 |
while (len >= psize) { |
638 |
cpu->memory_rw(cpu, cpu->mem, addr, |
639 |
(unsigned char *)s, psize, MEM_WRITE, |
640 |
CACHE_DATA); |
641 |
addr += psize; |
642 |
s += psize; |
643 |
len -= psize; |
644 |
} |
645 |
} |
646 |
psize >>= 2; |
647 |
} |
648 |
|
649 |
while (len-- != 0) |
650 |
store_byte(cpu, addr++, *s++); |
651 |
} |
652 |
|
653 |
|
654 |
/* |
655 |
* store_pointer_and_advance(): |
656 |
* |
657 |
* Stores a 32-bit or 64-bit pointer in emulated RAM, and advances the |
658 |
* target address. (Useful for e.g. ARCBIOS environment initialization.) |
659 |
*/ |
660 |
void store_pointer_and_advance(struct cpu *cpu, uint64_t *addrp, |
661 |
uint64_t data, int flag64) |
662 |
{ |
663 |
uint64_t addr = *addrp; |
664 |
if (flag64) { |
665 |
store_64bit_word(cpu, addr, data); |
666 |
addr += 8; |
667 |
} else { |
668 |
store_32bit_word(cpu, addr, data); |
669 |
addr += 4; |
670 |
} |
671 |
*addrp = addr; |
672 |
} |
673 |
|
674 |
|
675 |
/* |
676 |
* load_32bit_word(): |
677 |
* |
678 |
* Helper function. Prints a warning and returns 0, if the read failed. |
679 |
* Emulated byte order is taken into account. |
680 |
*/ |
681 |
uint32_t load_32bit_word(struct cpu *cpu, uint64_t addr) |
682 |
{ |
683 |
unsigned char data[4]; |
684 |
|
685 |
if (cpu->machine->arch == ARCH_MIPS && (addr >> 32) == 0) |
686 |
addr = (int64_t)(int32_t)addr; |
687 |
cpu->memory_rw(cpu, cpu->mem, |
688 |
addr, data, sizeof(data), MEM_READ, CACHE_DATA); |
689 |
|
690 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
691 |
int tmp = data[0]; data[0] = data[3]; data[3] = tmp; |
692 |
tmp = data[1]; data[1] = data[2]; data[2] = tmp; |
693 |
} |
694 |
|
695 |
return (data[0] << 24) + (data[1] << 16) + (data[2] << 8) + data[3]; |
696 |
} |
697 |
|
698 |
|
699 |
/* |
700 |
* load_16bit_word(): |
701 |
* |
702 |
* Helper function. Prints a warning and returns 0, if the read failed. |
703 |
* Emulated byte order is taken into account. |
704 |
*/ |
705 |
uint16_t load_16bit_word(struct cpu *cpu, uint64_t addr) |
706 |
{ |
707 |
unsigned char data[2]; |
708 |
|
709 |
if (cpu->machine->arch == ARCH_MIPS && (addr >> 32) == 0) |
710 |
addr = (int64_t)(int32_t)addr; |
711 |
cpu->memory_rw(cpu, cpu->mem, |
712 |
addr, data, sizeof(data), MEM_READ, CACHE_DATA); |
713 |
|
714 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
715 |
int tmp = data[0]; data[0] = data[1]; data[1] = tmp; |
716 |
} |
717 |
|
718 |
return (data[0] << 8) + data[1]; |
719 |
} |
720 |
|
721 |
|
722 |
/* |
723 |
* store_64bit_word_in_host(): |
724 |
* |
725 |
* Stores a 64-bit word in the _host's_ RAM. Emulated byte order is taken |
726 |
* into account. This is useful when building structs in the host's RAM |
727 |
* which will later be copied into emulated RAM. |
728 |
*/ |
729 |
void store_64bit_word_in_host(struct cpu *cpu, |
730 |
unsigned char *data, uint64_t data64) |
731 |
{ |
732 |
data[0] = (data64 >> 56) & 255; |
733 |
data[1] = (data64 >> 48) & 255; |
734 |
data[2] = (data64 >> 40) & 255; |
735 |
data[3] = (data64 >> 32) & 255; |
736 |
data[4] = (data64 >> 24) & 255; |
737 |
data[5] = (data64 >> 16) & 255; |
738 |
data[6] = (data64 >> 8) & 255; |
739 |
data[7] = (data64) & 255; |
740 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
741 |
int tmp = data[0]; data[0] = data[7]; data[7] = tmp; |
742 |
tmp = data[1]; data[1] = data[6]; data[6] = tmp; |
743 |
tmp = data[2]; data[2] = data[5]; data[5] = tmp; |
744 |
tmp = data[3]; data[3] = data[4]; data[4] = tmp; |
745 |
} |
746 |
} |
747 |
|
748 |
|
749 |
/* |
750 |
* store_32bit_word_in_host(): |
751 |
* |
752 |
* See comment for store_64bit_word_in_host(). |
753 |
* |
754 |
* (Note: The data32 parameter is a uint64_t. This is done to suppress |
755 |
* some warnings.) |
756 |
*/ |
757 |
void store_32bit_word_in_host(struct cpu *cpu, |
758 |
unsigned char *data, uint64_t data32) |
759 |
{ |
760 |
data[0] = (data32 >> 24) & 255; |
761 |
data[1] = (data32 >> 16) & 255; |
762 |
data[2] = (data32 >> 8) & 255; |
763 |
data[3] = (data32) & 255; |
764 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
765 |
int tmp = data[0]; data[0] = data[3]; data[3] = tmp; |
766 |
tmp = data[1]; data[1] = data[2]; data[2] = tmp; |
767 |
} |
768 |
} |
769 |
|
770 |
|
771 |
/* |
772 |
* store_16bit_word_in_host(): |
773 |
* |
774 |
* See comment for store_64bit_word_in_host(). |
775 |
*/ |
776 |
void store_16bit_word_in_host(struct cpu *cpu, |
777 |
unsigned char *data, uint16_t data16) |
778 |
{ |
779 |
data[0] = (data16 >> 8) & 255; |
780 |
data[1] = (data16) & 255; |
781 |
if (cpu->byte_order == EMUL_LITTLE_ENDIAN) { |
782 |
int tmp = data[0]; data[0] = data[1]; data[1] = tmp; |
783 |
} |
784 |
} |
785 |
|
786 |
|
787 |
/* |
788 |
* machine_setup(): |
789 |
* |
790 |
* This (rather large) function initializes memory, registers, and/or devices |
791 |
* required by specific machine emulations. |
792 |
*/ |
793 |
void machine_setup(struct machine *machine) |
794 |
{ |
795 |
struct memory *mem; |
796 |
struct machine_entry *me; |
797 |
|
798 |
/* Abreviation: :-) */ |
799 |
struct cpu *cpu = machine->cpus[machine->bootstrap_cpu]; |
800 |
|
801 |
machine->bootdev_id = diskimage_bootdev(machine, |
802 |
&machine->bootdev_type); |
803 |
|
804 |
mem = cpu->mem; |
805 |
machine->machine_name = NULL; |
806 |
|
807 |
/* TODO: Move this somewhere else? */ |
808 |
if (machine->boot_string_argument == NULL) { |
809 |
switch (machine->machine_type) { |
810 |
case MACHINE_ARC: |
811 |
machine->boot_string_argument = "-aN"; |
812 |
break; |
813 |
case MACHINE_CATS: |
814 |
machine->boot_string_argument = "-A"; |
815 |
break; |
816 |
case MACHINE_PMAX: |
817 |
machine->boot_string_argument = "-a"; |
818 |
break; |
819 |
default: |
820 |
/* Important, because boot_string_argument should |
821 |
not be set to NULL: */ |
822 |
machine->boot_string_argument = ""; |
823 |
} |
824 |
} |
825 |
|
826 |
|
827 |
/* |
828 |
* If the machine has a setup function in src/machines/machine_*.c |
829 |
* then use that one, otherwise use the old hardcoded stuff here: |
830 |
*/ |
831 |
|
832 |
me = first_machine_entry; |
833 |
while (me != NULL) { |
834 |
if (machine->machine_type == me->machine_type && |
835 |
me->setup != NULL) { |
836 |
me->setup(machine, cpu); |
837 |
break; |
838 |
} |
839 |
me = me->next; |
840 |
} |
841 |
|
842 |
if (me == NULL) { |
843 |
fatal("Unknown emulation type %i\n", machine->machine_type); |
844 |
exit(1); |
845 |
} |
846 |
|
847 |
if (machine->machine_name != NULL) |
848 |
debug("machine: %s", machine->machine_name); |
849 |
|
850 |
if (machine->emulated_hz > 0) |
851 |
debug(" (%.2f MHz)", (float)machine->emulated_hz / 1000000); |
852 |
debug("\n"); |
853 |
|
854 |
/* Default fake speed: 5 MHz */ |
855 |
if (machine->emulated_hz < 1) |
856 |
machine->emulated_hz = 5000000; |
857 |
|
858 |
if (machine->bootstr != NULL) { |
859 |
debug("bootstring%s: %s", (machine->bootarg!=NULL && |
860 |
strlen(machine->bootarg) >= 1)? "(+bootarg)" : "", |
861 |
machine->bootstr); |
862 |
if (machine->bootarg != NULL && strlen(machine->bootarg) >= 1) |
863 |
debug(" %s", machine->bootarg); |
864 |
debug("\n"); |
865 |
} |
866 |
|
867 |
if (verbose >= 2) |
868 |
machine_dump_bus_info(machine); |
869 |
|
870 |
if (!machine->stable) |
871 |
fatal("!\n! NOTE: This machine type is not implemented well" |
872 |
" enough yet to run\n! any real-world code!" |
873 |
" (At least, it hasn't been verified to do so.)\n!\n" |
874 |
"! Please read the GXemul documentation for information" |
875 |
" about which\n! machine types that actually work.\n!\n"); |
876 |
} |
877 |
|
878 |
|
879 |
/* |
880 |
* machine_memsize_fix(): |
881 |
* |
882 |
* Sets physical_ram_in_mb (if not already set), and memory_offset_in_mb, |
883 |
* depending on machine type. |
884 |
*/ |
885 |
void machine_memsize_fix(struct machine *m) |
886 |
{ |
887 |
if (m == NULL) { |
888 |
fatal("machine_defaultmemsize(): m == NULL?\n"); |
889 |
exit(1); |
890 |
} |
891 |
|
892 |
if (m->physical_ram_in_mb == 0) { |
893 |
struct machine_entry *me = first_machine_entry; |
894 |
while (me != NULL) { |
895 |
if (m->machine_type == me->machine_type && |
896 |
me->set_default_ram != NULL) { |
897 |
me->set_default_ram(m); |
898 |
break; |
899 |
} |
900 |
me = me->next; |
901 |
} |
902 |
} |
903 |
|
904 |
/* Special hack for hpcmips machines: */ |
905 |
if (m->machine_type == MACHINE_HPCMIPS) { |
906 |
m->dbe_on_nonexistant_memaccess = 0; |
907 |
} |
908 |
|
909 |
/* Special SGI memory offsets: (TODO: move this somewhere else) */ |
910 |
if (m->machine_type == MACHINE_SGI) { |
911 |
switch (m->machine_subtype) { |
912 |
case 20: |
913 |
case 22: |
914 |
case 24: |
915 |
case 26: |
916 |
m->memory_offset_in_mb = 128; |
917 |
break; |
918 |
case 28: |
919 |
case 30: |
920 |
m->memory_offset_in_mb = 512; |
921 |
break; |
922 |
} |
923 |
} |
924 |
|
925 |
if (m->physical_ram_in_mb == 0) |
926 |
m->physical_ram_in_mb = DEFAULT_RAM_IN_MB; |
927 |
} |
928 |
|
929 |
|
930 |
/* |
931 |
* machine_default_cputype(): |
932 |
* |
933 |
* Sets m->cpu_name, if it isn't already set, depending on the machine type. |
934 |
*/ |
935 |
void machine_default_cputype(struct machine *m) |
936 |
{ |
937 |
struct machine_entry *me; |
938 |
|
939 |
if (m == NULL) { |
940 |
fatal("machine_default_cputype(): m == NULL?\n"); |
941 |
exit(1); |
942 |
} |
943 |
|
944 |
/* Already set? Then return. */ |
945 |
if (m->cpu_name != NULL) |
946 |
return; |
947 |
|
948 |
me = first_machine_entry; |
949 |
while (me != NULL) { |
950 |
if (m->machine_type == me->machine_type && |
951 |
me->set_default_cpu != NULL) { |
952 |
me->set_default_cpu(m); |
953 |
break; |
954 |
} |
955 |
me = me->next; |
956 |
} |
957 |
|
958 |
if (m->cpu_name == NULL) { |
959 |
fprintf(stderr, "machine_default_cputype(): no default" |
960 |
" cpu for machine type %i subtype %i\n", |
961 |
m->machine_type, m->machine_subtype); |
962 |
exit(1); |
963 |
} |
964 |
} |
965 |
|
966 |
|
967 |
/*****************************************************************************/ |
968 |
|
969 |
|
970 |
/* |
971 |
* machine_run(): |
972 |
* |
973 |
* Run one or more instructions on all CPUs in this machine. (Usually, |
974 |
* around N_SAFE_DYNTRANS_LIMIT instructions will be run by the dyntrans |
975 |
* system.) |
976 |
* |
977 |
* Return value is 1 if any CPU in this machine is still running, |
978 |
* or 0 if all CPUs are stopped. |
979 |
*/ |
980 |
int machine_run(struct machine *machine) |
981 |
{ |
982 |
struct cpu **cpus = machine->cpus; |
983 |
int ncpus = machine->ncpus, cpu0instrs = 0, i, te; |
984 |
|
985 |
for (i=0; i<ncpus; i++) { |
986 |
if (cpus[i]->running) { |
987 |
int instrs_run = cpus[i]->run_instr(cpus[i]); |
988 |
if (i == 0) |
989 |
cpu0instrs += instrs_run; |
990 |
} |
991 |
} |
992 |
|
993 |
/* |
994 |
* Hardware 'ticks': (clocks, interrupt sources...) |
995 |
* |
996 |
* Here, cpu0instrs is the number of instructions executed on cpu0. |
997 |
* |
998 |
* TODO: This should be redesigned into some "mainbus" stuff instead! |
999 |
*/ |
1000 |
|
1001 |
machine->ninstrs += cpu0instrs; |
1002 |
|
1003 |
for (te=0; te<machine->n_tick_entries; te++) { |
1004 |
machine->ticks_till_next[te] -= cpu0instrs; |
1005 |
if (machine->ticks_till_next[te] <= 0) { |
1006 |
while (machine->ticks_till_next[te] <= 0) { |
1007 |
machine->ticks_till_next[te] += |
1008 |
machine->ticks_reset_value[te]; |
1009 |
} |
1010 |
|
1011 |
machine->tick_func[te](cpus[0], |
1012 |
machine->tick_extra[te]); |
1013 |
} |
1014 |
} |
1015 |
|
1016 |
/* Is any CPU still alive? */ |
1017 |
for (i=0; i<ncpus; i++) |
1018 |
if (cpus[i]->running) |
1019 |
return 1; |
1020 |
|
1021 |
return 0; |
1022 |
} |
1023 |
|
1024 |
|
1025 |
/*****************************************************************************/ |
1026 |
|
1027 |
|
1028 |
/* |
1029 |
* machine_entry_new(): |
1030 |
* |
1031 |
* This function creates a new machine_entry struct, and fills it with some |
1032 |
* valid data; it is up to the caller to add additional data that weren't |
1033 |
* passed as arguments to this function, such as alias names and machine |
1034 |
* subtypes. |
1035 |
*/ |
1036 |
struct machine_entry *machine_entry_new(const char *name, int arch, |
1037 |
int oldstyle_type) |
1038 |
{ |
1039 |
struct machine_entry *me; |
1040 |
|
1041 |
me = malloc(sizeof(struct machine_entry)); |
1042 |
if (me == NULL) { |
1043 |
fprintf(stderr, "machine_entry_new(): out of memory (1)\n"); |
1044 |
exit(1); |
1045 |
} |
1046 |
|
1047 |
memset(me, 0, sizeof(struct machine_entry)); |
1048 |
|
1049 |
me->name = name; |
1050 |
me->arch = arch; |
1051 |
me->machine_type = oldstyle_type; |
1052 |
me->n_aliases = 0; |
1053 |
me->aliases = NULL; |
1054 |
me->n_subtypes = 0; |
1055 |
me->setup = NULL; |
1056 |
|
1057 |
return me; |
1058 |
} |
1059 |
|
1060 |
|
1061 |
/* |
1062 |
* machine_entry_add_alias(): |
1063 |
* |
1064 |
* This function adds an "alias" to a machine entry. |
1065 |
*/ |
1066 |
void machine_entry_add_alias(struct machine_entry *me, const char *name) |
1067 |
{ |
1068 |
me->n_aliases ++; |
1069 |
me->aliases = realloc(me->aliases, sizeof(char *) * me->n_aliases); |
1070 |
if (me->aliases == NULL) { |
1071 |
fprintf(stderr, "out of memory\n"); |
1072 |
exit(1); |
1073 |
} |
1074 |
|
1075 |
me->aliases[me->n_aliases - 1] = (char *) name; |
1076 |
} |
1077 |
|
1078 |
|
1079 |
/* |
1080 |
* machine_entry_add_subtype(): |
1081 |
* |
1082 |
* This function adds a subtype to a machine entry. The argument list after |
1083 |
* oldstyle_subtype is a list of one or more char *, followed by NULL. E.g.: |
1084 |
* |
1085 |
* machine_entry_add_subtype(me, "Machine X", MACHINE_X, |
1086 |
* "machine-x", "x", NULL); |
1087 |
*/ |
1088 |
void machine_entry_add_subtype(struct machine_entry *me, const char *name, |
1089 |
int oldstyle_subtype, ...) |
1090 |
{ |
1091 |
va_list argp; |
1092 |
struct machine_entry_subtype *mes; |
1093 |
|
1094 |
/* Allocate a new subtype struct: */ |
1095 |
mes = malloc(sizeof(struct machine_entry_subtype)); |
1096 |
if (mes == NULL) { |
1097 |
fprintf(stderr, "machine_entry_subtype_new(): out " |
1098 |
"of memory (1)\n"); |
1099 |
exit(1); |
1100 |
} |
1101 |
|
1102 |
/* Add the subtype to the machine entry: */ |
1103 |
me->n_subtypes ++; |
1104 |
me->subtype = realloc(me->subtype, sizeof(struct |
1105 |
machine_entry_subtype *) * me->n_subtypes); |
1106 |
if (me->subtype == NULL) { |
1107 |
fprintf(stderr, "out of memory\n"); |
1108 |
exit(1); |
1109 |
} |
1110 |
me->subtype[me->n_subtypes - 1] = mes; |
1111 |
|
1112 |
/* Fill the struct with subtype data: */ |
1113 |
memset(mes, 0, sizeof(struct machine_entry_subtype)); |
1114 |
mes->name = name; |
1115 |
mes->machine_subtype = oldstyle_subtype; |
1116 |
|
1117 |
/* ... and all aliases: */ |
1118 |
mes->n_aliases = 0; |
1119 |
mes->aliases = NULL; |
1120 |
|
1121 |
va_start(argp, oldstyle_subtype); |
1122 |
|
1123 |
for (;;) { |
1124 |
char *s = va_arg(argp, char *); |
1125 |
if (s == NULL) |
1126 |
break; |
1127 |
|
1128 |
mes->n_aliases ++; |
1129 |
mes->aliases = realloc(mes->aliases, sizeof(char *) * |
1130 |
mes->n_aliases); |
1131 |
if (mes->aliases == NULL) { |
1132 |
fprintf(stderr, "out of memory\n"); |
1133 |
exit(1); |
1134 |
} |
1135 |
|
1136 |
mes->aliases[mes->n_aliases - 1] = s; |
1137 |
} |
1138 |
|
1139 |
va_end(argp); |
1140 |
} |
1141 |
|
1142 |
|
1143 |
/* |
1144 |
* machine_entry_register(): |
1145 |
* |
1146 |
* Inserts a new machine_entry into the machine entries list. |
1147 |
*/ |
1148 |
void machine_entry_register(struct machine_entry *me, int arch) |
1149 |
{ |
1150 |
struct machine_entry *prev, *next; |
1151 |
|
1152 |
/* Only insert it if the architecture is implemented in this |
1153 |
emulator configuration: */ |
1154 |
if (cpu_family_ptr_by_number(arch) == NULL) |
1155 |
return; |
1156 |
|
1157 |
prev = NULL; |
1158 |
next = first_machine_entry; |
1159 |
|
1160 |
for (;;) { |
1161 |
if (next == NULL) |
1162 |
break; |
1163 |
if (strcasecmp(me->name, next->name) < 0) |
1164 |
break; |
1165 |
|
1166 |
prev = next; |
1167 |
next = next->next; |
1168 |
} |
1169 |
|
1170 |
if (prev != NULL) |
1171 |
prev->next = me; |
1172 |
else |
1173 |
first_machine_entry = me; |
1174 |
me->next = next; |
1175 |
} |
1176 |
|
1177 |
|
1178 |
/* |
1179 |
* machine_list_available_types_and_cpus(): |
1180 |
* |
1181 |
* List all available machine types (for example when running the emulator |
1182 |
* with just -H as command line argument). |
1183 |
*/ |
1184 |
void machine_list_available_types_and_cpus(void) |
1185 |
{ |
1186 |
struct machine_entry *me; |
1187 |
int iadd = DEBUG_INDENTATION * 2; |
1188 |
|
1189 |
debug("Available CPU types:\n\n"); |
1190 |
|
1191 |
debug_indentation(iadd); |
1192 |
cpu_list_available_types(); |
1193 |
debug_indentation(-iadd); |
1194 |
|
1195 |
debug("\nMost of the CPU types are bogus, and not really implemented." |
1196 |
" The main effect of\nselecting a specific CPU type is to choose " |
1197 |
"what kind of 'id' it will have.\n\nAvailable machine types (with " |
1198 |
"aliases) and their subtypes:\n\n"); |
1199 |
|
1200 |
debug_indentation(iadd); |
1201 |
me = first_machine_entry; |
1202 |
|
1203 |
if (me == NULL) |
1204 |
fatal("No machines defined!\n"); |
1205 |
|
1206 |
while (me != NULL) { |
1207 |
int i, j, iadd = DEBUG_INDENTATION; |
1208 |
|
1209 |
debug("%s [%s] (", me->name, |
1210 |
cpu_family_ptr_by_number(me->arch)->name); |
1211 |
for (i=0; i<me->n_aliases; i++) |
1212 |
debug("%s\"%s\"", i? ", " : "", me->aliases[i]); |
1213 |
debug(")\n"); |
1214 |
|
1215 |
debug_indentation(iadd); |
1216 |
for (i=0; i<me->n_subtypes; i++) { |
1217 |
struct machine_entry_subtype *mes; |
1218 |
mes = me->subtype[i]; |
1219 |
debug("- %s", mes->name); |
1220 |
debug(" ("); |
1221 |
for (j=0; j<mes->n_aliases; j++) |
1222 |
debug("%s\"%s\"", j? ", " : "", |
1223 |
mes->aliases[j]); |
1224 |
debug(")\n"); |
1225 |
} |
1226 |
debug_indentation(-iadd); |
1227 |
|
1228 |
me = me->next; |
1229 |
} |
1230 |
debug_indentation(-iadd); |
1231 |
|
1232 |
debug("\nMost of the machine types are bogus too. Please read the " |
1233 |
"GXemul documentation\nfor information about which machine types " |
1234 |
"that actually work. Use the alias\nwhen selecting a machine type " |
1235 |
"or subtype, not the real name.\n"); |
1236 |
|
1237 |
#ifdef UNSTABLE_DEVEL |
1238 |
debug("\n"); |
1239 |
|
1240 |
useremul_list_emuls(); |
1241 |
debug("Userland emulation works for programs with the complexity" |
1242 |
" of Hello World,\nbut not much more.\n"); |
1243 |
#endif |
1244 |
} |
1245 |
|
1246 |
|
1247 |
/* |
1248 |
* machine_init(): |
1249 |
* |
1250 |
* This function should be called before any other machine_*() function |
1251 |
* is used. automachine_init() registers all machines in src/machines/. |
1252 |
*/ |
1253 |
void machine_init(void) |
1254 |
{ |
1255 |
if (first_machine_entry != NULL) { |
1256 |
fatal("machine_init(): already called?\n"); |
1257 |
exit(1); |
1258 |
} |
1259 |
|
1260 |
automachine_init(); |
1261 |
} |
1262 |
|