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/* |
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* Copyright (C) 2005-2007 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: cpu.c,v 1.370 2007/02/10 14:29:54 debug Exp $ |
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* |
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* Common routines for CPU emulation. (Not specific to any CPU type.) |
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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 <sys/types.h> |
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#include <sys/mman.h> |
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#include <string.h> |
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|
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#include "cpu.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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#include "settings.h" |
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|
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|
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extern size_t dyntrans_cache_size; |
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extern int native_code_translation_enabled; |
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|
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static struct cpu_family *first_cpu_family = NULL; |
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|
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|
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/* |
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* cpu_new(): |
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* |
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* Create a new cpu object. Each family is tried in sequence until a |
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* CPU family recognizes the cpu_type_name. |
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* |
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* If there was no match, NULL is returned. Otherwise, a pointer to an |
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* initialized cpu struct is returned. |
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*/ |
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struct cpu *cpu_new(struct memory *mem, struct machine *machine, |
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int cpu_id, char *name) |
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{ |
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struct cpu *cpu; |
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struct cpu_family *fp; |
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char *cpu_type_name; |
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char tmpstr[30]; |
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|
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if (name == NULL) { |
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fprintf(stderr, "cpu_new(): cpu name = NULL?\n"); |
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exit(1); |
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} |
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|
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cpu_type_name = strdup(name); |
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if (cpu_type_name == NULL) { |
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fprintf(stderr, "cpu_new(): out of memory\n"); |
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exit(1); |
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} |
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|
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cpu = zeroed_alloc(sizeof(struct cpu)); |
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|
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cpu->path = malloc(strlen(machine->path) + 15); |
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if (cpu->path == NULL) { |
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fprintf(stderr, "cpu_new(): out of memory\n"); |
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exit(1); |
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} |
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snprintf(cpu->path, strlen(machine->path) + 15, |
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"%s.cpu[%i]", machine->path, cpu_id); |
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|
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cpu->memory_rw = NULL; |
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cpu->name = cpu_type_name; |
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cpu->mem = mem; |
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cpu->machine = machine; |
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cpu->cpu_id = cpu_id; |
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cpu->byte_order = EMUL_UNDEFINED_ENDIAN; |
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cpu->running = 0; |
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|
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/* Create settings, and attach to the machine: */ |
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cpu->settings = settings_new(); |
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snprintf(tmpstr, sizeof(tmpstr), "cpu[%i]", cpu_id); |
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settings_add(machine->settings, tmpstr, 1, |
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SETTINGS_TYPE_SUBSETTINGS, 0, cpu->settings); |
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|
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settings_add(cpu->settings, "name", 0, SETTINGS_TYPE_STRING, |
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SETTINGS_FORMAT_STRING, (void *) &cpu->name); |
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settings_add(cpu->settings, "running", 0, SETTINGS_TYPE_INT, |
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SETTINGS_FORMAT_YESNO, (void *) &cpu->running); |
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|
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cpu_create_or_reset_tc(cpu); |
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|
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fp = first_cpu_family; |
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|
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while (fp != NULL) { |
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if (fp->cpu_new != NULL) { |
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if (fp->cpu_new(cpu, mem, machine, cpu_id, |
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cpu_type_name)) { |
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/* Sanity check: */ |
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if (cpu->memory_rw == NULL) { |
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fatal("\ncpu_new(): memory_rw == " |
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"NULL\n"); |
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exit(1); |
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} |
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break; |
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} |
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} |
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|
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fp = fp->next; |
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} |
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|
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if (fp == NULL) { |
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fatal("\ncpu_new(): unknown cpu type '%s'\n", cpu_type_name); |
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return NULL; |
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} |
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|
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fp->init_tables(cpu); |
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|
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if (cpu->byte_order == EMUL_UNDEFINED_ENDIAN) { |
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fatal("\ncpu_new(): Internal bug: Endianness not set.\n"); |
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exit(1); |
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} |
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|
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return cpu; |
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} |
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|
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|
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/* |
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* cpu_destroy(): |
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* |
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* Destroy a cpu object. |
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*/ |
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void cpu_destroy(struct cpu *cpu) |
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{ |
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settings_remove(cpu->settings, "name"); |
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settings_remove(cpu->settings, "running"); |
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|
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/* Remove any remaining level-1 settings: */ |
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settings_remove_all(cpu->settings); |
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|
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settings_destroy(cpu->settings); |
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|
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if (cpu->path != NULL) |
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free(cpu->path); |
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|
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/* TODO: This assumes that zeroed_alloc() actually succeeded |
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with using mmap(), and not malloc()! */ |
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munmap((void *)cpu, sizeof(struct cpu)); |
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} |
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|
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|
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/* |
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* cpu_tlbdump(): |
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* |
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* Called from the debugger to dump the TLB in a readable format. |
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* x is the cpu number to dump, or -1 to dump all CPUs. |
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* |
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* If rawflag is nonzero, then the TLB contents isn't formated nicely, |
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* just dumped. |
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*/ |
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void cpu_tlbdump(struct machine *m, int x, int rawflag) |
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{ |
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if (m->cpu_family == NULL || m->cpu_family->tlbdump == NULL) |
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fatal("cpu_tlbdump(): NULL\n"); |
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else |
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m->cpu_family->tlbdump(m, x, rawflag); |
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} |
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|
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|
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/* |
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* cpu_disassemble_instr(): |
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* |
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* Convert an instruction word into human readable format, for instruction |
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* tracing. |
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*/ |
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int cpu_disassemble_instr(struct machine *m, struct cpu *cpu, |
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unsigned char *instr, int running, uint64_t addr) |
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{ |
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if (m->cpu_family == NULL || m->cpu_family->disassemble_instr == NULL) { |
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fatal("cpu_disassemble_instr(): NULL\n"); |
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return 0; |
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} else |
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return m->cpu_family->disassemble_instr(cpu, instr, |
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running, addr); |
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} |
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|
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|
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/* |
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* cpu_register_dump(): |
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* |
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* Dump cpu registers in a relatively readable format. |
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* |
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* gprs: set to non-zero to dump GPRs. (CPU dependent.) |
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* coprocs: set bit 0..x to dump registers in coproc 0..x. (CPU dependent.) |
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*/ |
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void cpu_register_dump(struct machine *m, struct cpu *cpu, |
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int gprs, int coprocs) |
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{ |
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if (m->cpu_family == NULL || m->cpu_family->register_dump == NULL) |
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fatal("cpu_register_dump(): NULL\n"); |
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else |
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m->cpu_family->register_dump(cpu, gprs, coprocs); |
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} |
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|
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|
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/* |
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* cpu_gdb_stub(): |
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* |
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* Execute a "remote GDB" command. Return value is a pointer to a newly |
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* allocated response string, if the command was successfully executed. If |
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* there was an error, NULL is returned. |
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*/ |
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char *cpu_gdb_stub(struct cpu *cpu, char *cmd) |
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{ |
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if (cpu->machine->cpu_family == NULL || |
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cpu->machine->cpu_family->gdb_stub == NULL) { |
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fatal("cpu_gdb_stub(): NULL\n"); |
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return NULL; |
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} else |
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return cpu->machine->cpu_family->gdb_stub(cpu, cmd); |
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} |
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|
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|
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/* |
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* cpu_functioncall_trace(): |
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* |
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* This function should be called if machine->show_trace_tree is enabled, and |
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* a function call is being made. f contains the address of the function. |
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*/ |
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void cpu_functioncall_trace(struct cpu *cpu, uint64_t f) |
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{ |
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int i, n_args = -1; |
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char *symbol; |
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uint64_t offset; |
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|
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if (cpu->machine->ncpus > 1) |
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fatal("cpu%i:\t", cpu->cpu_id); |
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|
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cpu->trace_tree_depth ++; |
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if (cpu->trace_tree_depth > 100) |
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cpu->trace_tree_depth = 100; |
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for (i=0; i<cpu->trace_tree_depth; i++) |
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fatal(" "); |
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|
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fatal("<"); |
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symbol = get_symbol_name_and_n_args(&cpu->machine->symbol_context, |
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f, &offset, &n_args); |
266 |
if (symbol != NULL) |
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fatal("%s", symbol); |
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else { |
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if (cpu->is_32bit) |
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fatal("0x%"PRIx32, (uint32_t) f); |
271 |
else |
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fatal("0x%"PRIx64, (uint64_t) f); |
273 |
} |
274 |
fatal("("); |
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|
276 |
if (cpu->machine->cpu_family->functioncall_trace != NULL) |
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cpu->machine->cpu_family->functioncall_trace(cpu, f, n_args); |
278 |
|
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fatal(")>\n"); |
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|
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#ifdef PRINT_MEMORY_CHECKSUM |
282 |
/* Temporary hack for finding bugs: */ |
283 |
fatal("call chksum=%016"PRIx64"\n", memory_checksum(cpu->mem)); |
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#endif |
285 |
} |
286 |
|
287 |
|
288 |
/* |
289 |
* cpu_functioncall_trace_return(): |
290 |
* |
291 |
* This function should be called if machine->show_trace_tree is enabled, and |
292 |
* a function is being returned from. |
293 |
* |
294 |
* TODO: Print return value? This could be implemented similar to the |
295 |
* cpu->functioncall_trace function call above. |
296 |
*/ |
297 |
void cpu_functioncall_trace_return(struct cpu *cpu) |
298 |
{ |
299 |
cpu->trace_tree_depth --; |
300 |
if (cpu->trace_tree_depth < 0) |
301 |
cpu->trace_tree_depth = 0; |
302 |
} |
303 |
|
304 |
|
305 |
/* |
306 |
* cpu_create_or_reset_tc(): |
307 |
* |
308 |
* Create the translation cache in memory (ie allocate memory for it), if |
309 |
* necessary, and then reset it to an initial state. |
310 |
*/ |
311 |
void cpu_create_or_reset_tc(struct cpu *cpu) |
312 |
{ |
313 |
size_t s = dyntrans_cache_size + DYNTRANS_CACHE_MARGIN; |
314 |
|
315 |
if (cpu->translation_cache == NULL) { |
316 |
cpu->translation_cache = zeroed_alloc(s); |
317 |
|
318 |
#ifdef NATIVE_CODE_GENERATION |
319 |
if (native_code_translation_enabled) { |
320 |
mprotect(cpu->translation_cache, s, |
321 |
PROT_READ | PROT_WRITE | PROT_EXEC); |
322 |
} |
323 |
#endif |
324 |
} |
325 |
|
326 |
cpu->currently_translating_to_native = 0; |
327 |
|
328 |
/* Create an empty table at the beginning of the translation cache: */ |
329 |
memset(cpu->translation_cache, 0, sizeof(uint32_t) |
330 |
* N_BASE_TABLE_ENTRIES); |
331 |
|
332 |
cpu->translation_cache_cur_ofs = |
333 |
N_BASE_TABLE_ENTRIES * sizeof(uint32_t); |
334 |
|
335 |
/* |
336 |
* There might be other translation pointers that still point to |
337 |
* within the translation_cache region. Let's invalidate those too: |
338 |
*/ |
339 |
if (cpu->invalidate_code_translation != NULL) |
340 |
cpu->invalidate_code_translation(cpu, 0, INVALIDATE_ALL); |
341 |
} |
342 |
|
343 |
|
344 |
/* |
345 |
* cpu_dumpinfo(): |
346 |
* |
347 |
* Dumps info about a CPU using debug(). "cpu0: CPUNAME, running" (or similar) |
348 |
* is outputed, and it is up to CPU dependent code to complete the line. |
349 |
*/ |
350 |
void cpu_dumpinfo(struct machine *m, struct cpu *cpu) |
351 |
{ |
352 |
debug("cpu%i: %s, %s", cpu->cpu_id, cpu->name, |
353 |
cpu->running? "running" : "stopped"); |
354 |
|
355 |
if (m->cpu_family == NULL || m->cpu_family->dumpinfo == NULL) |
356 |
fatal("cpu_dumpinfo(): NULL\n"); |
357 |
else |
358 |
m->cpu_family->dumpinfo(cpu); |
359 |
} |
360 |
|
361 |
|
362 |
/* |
363 |
* cpu_list_available_types(): |
364 |
* |
365 |
* Print a list of available CPU types for each cpu family. |
366 |
*/ |
367 |
void cpu_list_available_types(void) |
368 |
{ |
369 |
struct cpu_family *fp; |
370 |
int iadd = DEBUG_INDENTATION; |
371 |
|
372 |
fp = first_cpu_family; |
373 |
|
374 |
if (fp == NULL) { |
375 |
debug("No CPUs defined!\n"); |
376 |
return; |
377 |
} |
378 |
|
379 |
while (fp != NULL) { |
380 |
debug("%s:\n", fp->name); |
381 |
debug_indentation(iadd); |
382 |
if (fp->list_available_types != NULL) |
383 |
fp->list_available_types(); |
384 |
else |
385 |
debug("(internal error: list_available_types" |
386 |
" = NULL)\n"); |
387 |
debug_indentation(-iadd); |
388 |
|
389 |
fp = fp->next; |
390 |
} |
391 |
} |
392 |
|
393 |
|
394 |
/* |
395 |
* cpu_run_deinit(): |
396 |
* |
397 |
* Shuts down all CPUs in a machine when ending a simulation. (This function |
398 |
* should only need to be called once for each machine.) |
399 |
*/ |
400 |
void cpu_run_deinit(struct machine *machine) |
401 |
{ |
402 |
int te; |
403 |
|
404 |
/* |
405 |
* Two last ticks of every hardware device. This will allow e.g. |
406 |
* framebuffers to draw the last updates to the screen before halting. |
407 |
* |
408 |
* TODO: This should be refactored when redesigning the mainbus |
409 |
* concepts! |
410 |
*/ |
411 |
for (te=0; te<machine->n_tick_entries; te++) { |
412 |
machine->tick_func[te](machine->cpus[0], |
413 |
machine->tick_extra[te]); |
414 |
machine->tick_func[te](machine->cpus[0], |
415 |
machine->tick_extra[te]); |
416 |
} |
417 |
|
418 |
if (machine->show_nr_of_instructions) |
419 |
cpu_show_cycles(machine, 1); |
420 |
|
421 |
fflush(stdout); |
422 |
} |
423 |
|
424 |
|
425 |
/* |
426 |
* cpu_show_cycles(): |
427 |
* |
428 |
* If show_nr_of_instructions is on, then print a line to stdout about how |
429 |
* many instructions/cycles have been executed so far. |
430 |
*/ |
431 |
void cpu_show_cycles(struct machine *machine, int forced) |
432 |
{ |
433 |
uint64_t offset, pc; |
434 |
char *symbol; |
435 |
int64_t mseconds, ninstrs, is, avg; |
436 |
struct timeval tv; |
437 |
struct cpu *cpu = machine->cpus[machine->bootstrap_cpu]; |
438 |
|
439 |
static int64_t mseconds_last = 0; |
440 |
static int64_t ninstrs_last = -1; |
441 |
|
442 |
pc = cpu->pc; |
443 |
|
444 |
gettimeofday(&tv, NULL); |
445 |
mseconds = (tv.tv_sec - machine->starttime.tv_sec) * 1000 |
446 |
+ (tv.tv_usec - machine->starttime.tv_usec) / 1000; |
447 |
|
448 |
if (mseconds == 0) |
449 |
mseconds = 1; |
450 |
|
451 |
if (mseconds - mseconds_last == 0) |
452 |
mseconds ++; |
453 |
|
454 |
ninstrs = machine->ninstrs_since_gettimeofday; |
455 |
|
456 |
/* RETURN here, unless show_nr_of_instructions (-N) is turned on: */ |
457 |
if (!machine->show_nr_of_instructions && !forced) |
458 |
goto do_return; |
459 |
|
460 |
printf("[ %"PRIi64" instrs", (int64_t)machine->ninstrs); |
461 |
|
462 |
/* Instructions per second, and average so far: */ |
463 |
is = 1000 * (ninstrs-ninstrs_last) / (mseconds-mseconds_last); |
464 |
avg = (long long)1000 * ninstrs / mseconds; |
465 |
if (is < 0) |
466 |
is = 0; |
467 |
if (avg < 0) |
468 |
avg = 0; |
469 |
|
470 |
if (cpu->has_been_idling) { |
471 |
printf("; idling"); |
472 |
cpu->has_been_idling = 0; |
473 |
} else |
474 |
printf("; i/s=%"PRIi64" avg=%"PRIi64, is, avg); |
475 |
|
476 |
symbol = get_symbol_name(&machine->symbol_context, pc, &offset); |
477 |
|
478 |
if (machine->ncpus == 1) { |
479 |
if (cpu->is_32bit) |
480 |
printf("; pc=0x%08"PRIx32, (uint32_t) pc); |
481 |
else |
482 |
printf("; pc=0x%016"PRIx64, (uint64_t) pc); |
483 |
} |
484 |
|
485 |
if (symbol != NULL) |
486 |
printf(" <%s>", symbol); |
487 |
printf(" ]\n"); |
488 |
|
489 |
do_return: |
490 |
ninstrs_last = ninstrs; |
491 |
mseconds_last = mseconds; |
492 |
} |
493 |
|
494 |
|
495 |
/* |
496 |
* cpu_run_init(): |
497 |
* |
498 |
* Prepare to run instructions on all CPUs in this machine. (This function |
499 |
* should only need to be called once for each machine.) |
500 |
*/ |
501 |
void cpu_run_init(struct machine *machine) |
502 |
{ |
503 |
machine->ninstrs_flush = 0; |
504 |
machine->ninstrs = 0; |
505 |
machine->ninstrs_show = 0; |
506 |
|
507 |
/* For performance measurement: */ |
508 |
gettimeofday(&machine->starttime, NULL); |
509 |
machine->ninstrs_since_gettimeofday = 0; |
510 |
} |
511 |
|
512 |
|
513 |
/* |
514 |
* add_cpu_family(): |
515 |
* |
516 |
* Allocates a cpu_family struct and calls an init function for the |
517 |
* family to fill in reasonable data and pointers. |
518 |
*/ |
519 |
static void add_cpu_family(int (*family_init)(struct cpu_family *), int arch) |
520 |
{ |
521 |
struct cpu_family *fp, *tmp; |
522 |
int res; |
523 |
|
524 |
fp = malloc(sizeof(struct cpu_family)); |
525 |
if (fp == NULL) { |
526 |
fprintf(stderr, "add_cpu_family(): out of memory\n"); |
527 |
exit(1); |
528 |
} |
529 |
memset(fp, 0, sizeof(struct cpu_family)); |
530 |
|
531 |
/* |
532 |
* family_init() returns 1 if the struct has been filled with |
533 |
* valid data, 0 if suppor for the cpu family isn't compiled |
534 |
* into the emulator. |
535 |
*/ |
536 |
res = family_init(fp); |
537 |
if (!res) { |
538 |
free(fp); |
539 |
return; |
540 |
} |
541 |
fp->arch = arch; |
542 |
fp->next = NULL; |
543 |
|
544 |
/* Add last in family chain: */ |
545 |
tmp = first_cpu_family; |
546 |
if (tmp == NULL) { |
547 |
first_cpu_family = fp; |
548 |
} else { |
549 |
while (tmp->next != NULL) |
550 |
tmp = tmp->next; |
551 |
tmp->next = fp; |
552 |
} |
553 |
} |
554 |
|
555 |
|
556 |
/* |
557 |
* cpu_family_ptr_by_number(): |
558 |
* |
559 |
* Returns a pointer to a CPU family based on the ARCH_* integers. |
560 |
*/ |
561 |
struct cpu_family *cpu_family_ptr_by_number(int arch) |
562 |
{ |
563 |
struct cpu_family *fp; |
564 |
fp = first_cpu_family; |
565 |
|
566 |
/* YUCK! This is too hardcoded! TODO */ |
567 |
|
568 |
while (fp != NULL) { |
569 |
if (arch == fp->arch) |
570 |
return fp; |
571 |
fp = fp->next; |
572 |
} |
573 |
|
574 |
return NULL; |
575 |
} |
576 |
|
577 |
|
578 |
/* |
579 |
* cpu_init(): |
580 |
* |
581 |
* Should be called before any other cpu_*() function. |
582 |
* |
583 |
* TODO: Make this nicer by moving out the conditional stuff to |
584 |
* an automagically generated file? Or a define in config.h? |
585 |
*/ |
586 |
void cpu_init(void) |
587 |
{ |
588 |
/* Note: These are registered in alphabetic order. */ |
589 |
|
590 |
#ifdef ENABLE_ALPHA |
591 |
add_cpu_family(alpha_cpu_family_init, ARCH_ALPHA); |
592 |
#endif |
593 |
|
594 |
#ifdef ENABLE_ARM |
595 |
add_cpu_family(arm_cpu_family_init, ARCH_ARM); |
596 |
#endif |
597 |
|
598 |
#ifdef ENABLE_AVR |
599 |
add_cpu_family(avr_cpu_family_init, ARCH_AVR); |
600 |
#endif |
601 |
|
602 |
#ifdef ENABLE_RCA180X |
603 |
add_cpu_family(rca180x_cpu_family_init, ARCH_RCA180X); |
604 |
#endif |
605 |
|
606 |
#ifdef ENABLE_M68K |
607 |
add_cpu_family(m68k_cpu_family_init, ARCH_M68K); |
608 |
#endif |
609 |
|
610 |
#ifdef ENABLE_MIPS |
611 |
add_cpu_family(mips_cpu_family_init, ARCH_MIPS); |
612 |
#endif |
613 |
|
614 |
#ifdef ENABLE_PPC |
615 |
add_cpu_family(ppc_cpu_family_init, ARCH_PPC); |
616 |
#endif |
617 |
|
618 |
#ifdef ENABLE_SH |
619 |
add_cpu_family(sh_cpu_family_init, ARCH_SH); |
620 |
#endif |
621 |
|
622 |
#ifdef ENABLE_SPARC |
623 |
add_cpu_family(sparc_cpu_family_init, ARCH_SPARC); |
624 |
#endif |
625 |
|
626 |
#ifdef ENABLE_TRANSPUTER |
627 |
add_cpu_family(transputer_cpu_family_init, ARCH_TRANSPUTER); |
628 |
#endif |
629 |
} |
630 |
|