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dpavlin |
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/* |
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* Copyright (C) 2005 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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dpavlin |
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* $Id: cpu.c,v 1.298 2005/06/27 10:43:16 debug Exp $ |
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dpavlin |
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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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#include <stdio.h> |
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#include <stdlib.h> |
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#include <sys/types.h> |
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#include <string.h> |
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#include "cpu.h" |
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#include "machine.h" |
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#include "misc.h" |
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extern int quiet_mode; |
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extern int show_opcode_statistics; |
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static struct cpu_family *first_cpu_family = NULL; |
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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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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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dpavlin |
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struct cpu *cpu; |
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dpavlin |
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struct cpu_family *fp; |
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char *cpu_type_name; |
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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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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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dpavlin |
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cpu = malloc(sizeof(struct cpu)); |
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if (cpu == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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memset(cpu, 0, sizeof(struct cpu)); |
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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_LITTLE_ENDIAN; |
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cpu->bootstrap_cpu_flag = 0; |
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cpu->running = 0; |
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fp = first_cpu_family; |
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while (fp != NULL) { |
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if (fp->cpu_new != NULL) { |
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dpavlin |
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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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dpavlin |
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exit(1); |
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} |
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return cpu; |
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dpavlin |
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} |
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} |
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fp = fp->next; |
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} |
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fatal("\ncpu_new(): unknown cpu type '%s'\n", cpu_type_name); |
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exit(1); |
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} |
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/* |
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* cpu_show_full_statistics(): |
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* |
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* Show detailed statistics on opcode usage on each cpu. |
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*/ |
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void cpu_show_full_statistics(struct machine *m) |
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{ |
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if (m->cpu_family == NULL || |
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m->cpu_family->show_full_statistics == NULL) |
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fatal("cpu_show_full_statistics(): NULL\n"); |
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else |
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m->cpu_family->show_full_statistics(m); |
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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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* cpu_register_match(): |
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* |
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* Used by the debugger. |
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*/ |
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void cpu_register_match(struct machine *m, char *name, |
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int writeflag, uint64_t *valuep, int *match_register) |
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{ |
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if (m->cpu_family == NULL || m->cpu_family->register_match == NULL) |
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fatal("cpu_register_match(): NULL\n"); |
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else |
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m->cpu_family->register_match(m, name, writeflag, |
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valuep, match_register); |
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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, int bintrans) |
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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, bintrans); |
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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 dependant.) |
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* coprocs: set bit 0..x to dump registers in coproc 0..x. (CPU dependant.) |
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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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* cpu_interrupt(): |
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* |
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* Assert an interrupt. |
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* Return value is 1 if the interrupt was asserted, 0 otherwise. |
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*/ |
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int cpu_interrupt(struct cpu *cpu, uint64_t irq_nr) |
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{ |
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if (cpu->machine->cpu_family == NULL || |
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cpu->machine->cpu_family->interrupt == NULL) { |
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fatal("cpu_interrupt(): NULL\n"); |
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return 0; |
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} else |
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return cpu->machine->cpu_family->interrupt(cpu, irq_nr); |
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} |
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/* |
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* cpu_interrupt_ack(): |
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* |
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* Acknowledge an interrupt. |
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* Return value is 1 if the interrupt was deasserted, 0 otherwise. |
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*/ |
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int cpu_interrupt_ack(struct cpu *cpu, uint64_t irq_nr) |
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{ |
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if (cpu->machine->cpu_family == NULL || |
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cpu->machine->cpu_family->interrupt_ack == NULL) { |
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/* debug("cpu_interrupt_ack(): NULL\n"); */ |
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return 0; |
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} else |
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return cpu->machine->cpu_family->interrupt_ack(cpu, irq_nr); |
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} |
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/* |
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* cpu_run(): |
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* |
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* Run instructions on all CPUs in this machine, for a "medium duration" |
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* (or until all CPUs have halted). |
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* |
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* Return value is 1 if anything happened, 0 if all CPUs are stopped. |
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*/ |
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int cpu_run(struct emul *emul, struct machine *m) |
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{ |
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if (m->cpu_family == NULL || m->cpu_family->run == NULL) { |
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fatal("cpu_run(): NULL\n"); |
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return 0; |
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} else |
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return m->cpu_family->run(emul, m); |
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} |
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/* |
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* cpu_dumpinfo(): |
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* |
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* Dumps info about a CPU using debug(). "cpu0: CPUNAME, running" (or similar) |
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* is outputed, and it is up to CPU dependant code to complete the line. |
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*/ |
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void cpu_dumpinfo(struct machine *m, struct cpu *cpu) |
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{ |
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debug("cpu%i: %s, %s", cpu->cpu_id, cpu->name, |
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cpu->running? "running" : "stopped"); |
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if (m->cpu_family == NULL || m->cpu_family->dumpinfo == NULL) |
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fatal("cpu_dumpinfo(): NULL\n"); |
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else |
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m->cpu_family->dumpinfo(cpu); |
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} |
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/* |
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* cpu_list_available_types(): |
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* |
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* Print a list of available CPU types for each cpu family. |
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*/ |
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void cpu_list_available_types(void) |
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{ |
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struct cpu_family *fp; |
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int iadd = 4; |
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fp = first_cpu_family; |
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if (fp == NULL) { |
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debug("No CPUs defined!\n"); |
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return; |
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} |
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while (fp != NULL) { |
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debug("%s:\n", fp->name); |
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debug_indentation(iadd); |
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if (fp->list_available_types != NULL) |
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fp->list_available_types(); |
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else |
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debug("(internal error: list_available_types" |
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" = NULL)\n"); |
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debug_indentation(-iadd); |
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fp = fp->next; |
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} |
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} |
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/* |
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* cpu_run_deinit(): |
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* |
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* Shuts down all CPUs in a machine when ending a simulation. (This function |
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* should only need to be called once for each machine.) |
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*/ |
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void cpu_run_deinit(struct emul *emul, struct machine *machine) |
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{ |
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int te; |
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311 |
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/* |
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* Two last ticks of every hardware device. This will allow |
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* framebuffers to draw the last updates to the screen before |
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* halting. |
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*/ |
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for (te=0; te<machine->n_tick_entries; te++) { |
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machine->tick_func[te](machine->cpus[0], |
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machine->tick_extra[te]); |
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machine->tick_func[te](machine->cpus[0], |
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machine->tick_extra[te]); |
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} |
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debug("cpu_run_deinit(): All CPUs halted.\n"); |
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if (machine->show_nr_of_instructions || !quiet_mode) |
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dpavlin |
10 |
cpu_show_cycles(machine, 1); |
327 |
dpavlin |
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328 |
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if (show_opcode_statistics) |
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cpu_show_full_statistics(machine); |
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fflush(stdout); |
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} |
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/* |
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* cpu_show_cycles(): |
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* |
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* If automatic adjustment of clock interrupts is turned on, then recalculate |
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* emulated_hz. Also, if show_nr_of_instructions is on, then print a |
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* line to stdout about how many instructions/cycles have been executed so |
341 |
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* far. |
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*/ |
343 |
dpavlin |
10 |
void cpu_show_cycles(struct machine *machine, int forced) |
344 |
dpavlin |
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{ |
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uint64_t offset, pc; |
346 |
dpavlin |
10 |
int is_32bit = 0, instrs_per_cycle = 1; |
347 |
dpavlin |
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char *symbol; |
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int64_t mseconds, ninstrs; |
349 |
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struct timeval tv; |
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int h, m, s, ms, d; |
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352 |
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static int64_t mseconds_last = 0; |
353 |
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static int64_t ninstrs_last = -1; |
354 |
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dpavlin |
10 |
switch (machine->arch) { |
356 |
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case ARCH_MIPS: |
357 |
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if (machine->cpus[machine->bootstrap_cpu]->cd.mips. |
358 |
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cpu_type.isa_level < 3 || machine->cpus[machine-> |
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bootstrap_cpu]->cd.mips.cpu_type.isa_level == 32) |
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is_32bit = 1; |
361 |
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instrs_per_cycle = machine->cpus[machine->bootstrap_cpu]-> |
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cd.mips.cpu_type.instrs_per_cycle; |
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break; |
364 |
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case ARCH_ARM: |
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is_32bit = 1; |
366 |
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break; |
367 |
dpavlin |
2 |
} |
368 |
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369 |
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pc = machine->cpus[machine->bootstrap_cpu]->pc; |
370 |
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371 |
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gettimeofday(&tv, NULL); |
372 |
dpavlin |
10 |
mseconds = (tv.tv_sec - machine->starttime.tv_sec) * 1000 |
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+ (tv.tv_usec - machine->starttime.tv_usec) / 1000; |
374 |
dpavlin |
2 |
|
375 |
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if (mseconds == 0) |
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mseconds = 1; |
377 |
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378 |
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if (mseconds - mseconds_last == 0) |
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mseconds ++; |
380 |
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|
381 |
dpavlin |
10 |
ninstrs = machine->ncycles_since_gettimeofday * instrs_per_cycle; |
382 |
dpavlin |
2 |
|
383 |
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if (machine->automatic_clock_adjustment) { |
384 |
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static int first_adjustment = 1; |
385 |
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386 |
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/* Current nr of cycles per second: */ |
387 |
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int64_t cur_cycles_per_second = 1000 * |
388 |
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(ninstrs-ninstrs_last) / (mseconds-mseconds_last) |
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/ instrs_per_cycle; |
390 |
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391 |
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if (cur_cycles_per_second < 1000000) |
392 |
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cur_cycles_per_second = 1000000; |
393 |
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394 |
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if (first_adjustment) { |
395 |
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machine->emulated_hz = cur_cycles_per_second; |
396 |
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first_adjustment = 0; |
397 |
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} else { |
398 |
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machine->emulated_hz = (15 * machine->emulated_hz + |
399 |
|
|
cur_cycles_per_second) / 16; |
400 |
|
|
} |
401 |
|
|
|
402 |
|
|
debug("[ updating emulated_hz to %lli Hz ]\n", |
403 |
|
|
(long long)machine->emulated_hz); |
404 |
|
|
} |
405 |
|
|
|
406 |
|
|
|
407 |
|
|
/* RETURN here, unless show_nr_of_instructions (-N) is turned on: */ |
408 |
|
|
if (!machine->show_nr_of_instructions && !forced) |
409 |
|
|
goto do_return; |
410 |
|
|
|
411 |
dpavlin |
10 |
printf("[ %lli instrs", |
412 |
|
|
(long long)(machine->ncycles * instrs_per_cycle)); |
413 |
dpavlin |
2 |
|
414 |
|
|
if (!machine->automatic_clock_adjustment) { |
415 |
|
|
d = machine->emulated_hz / 1000; |
416 |
|
|
if (d < 1) |
417 |
|
|
d = 1; |
418 |
dpavlin |
10 |
ms = machine->ncycles / d; |
419 |
dpavlin |
2 |
h = ms / 3600000; |
420 |
|
|
ms -= 3600000 * h; |
421 |
|
|
m = ms / 60000; |
422 |
|
|
ms -= 60000 * m; |
423 |
|
|
s = ms / 1000; |
424 |
|
|
ms -= 1000 * s; |
425 |
|
|
|
426 |
|
|
printf("emulated time = %02i:%02i:%02i.%03i; ", h, m, s, ms); |
427 |
|
|
} |
428 |
|
|
|
429 |
|
|
/* Instructions per second, and average so far: */ |
430 |
dpavlin |
10 |
printf("; i/s=%lli avg=%lli; ", |
431 |
dpavlin |
2 |
(long long) ((long long)1000 * (ninstrs-ninstrs_last) |
432 |
|
|
/ (mseconds-mseconds_last)), |
433 |
|
|
(long long) ((long long)1000 * ninstrs / mseconds)); |
434 |
|
|
|
435 |
|
|
symbol = get_symbol_name(&machine->symbol_context, pc, &offset); |
436 |
|
|
|
437 |
|
|
if (is_32bit) |
438 |
dpavlin |
10 |
printf("pc=0x%08x", (int)pc); |
439 |
dpavlin |
2 |
else |
440 |
dpavlin |
10 |
printf("pc=0x%016llx", (long long)pc); |
441 |
dpavlin |
2 |
|
442 |
dpavlin |
10 |
if (symbol != NULL) |
443 |
|
|
printf(" <%s>", symbol); |
444 |
|
|
printf(" ]\n"); |
445 |
dpavlin |
2 |
|
446 |
|
|
do_return: |
447 |
|
|
ninstrs_last = ninstrs; |
448 |
|
|
mseconds_last = mseconds; |
449 |
|
|
} |
450 |
|
|
|
451 |
|
|
|
452 |
|
|
/* |
453 |
|
|
* cpu_run_init(): |
454 |
|
|
* |
455 |
|
|
* Prepare to run instructions on all CPUs in this machine. (This function |
456 |
|
|
* should only need to be called once for each machine.) |
457 |
|
|
*/ |
458 |
|
|
void cpu_run_init(struct emul *emul, struct machine *machine) |
459 |
|
|
{ |
460 |
|
|
int ncpus = machine->ncpus; |
461 |
|
|
int te; |
462 |
|
|
|
463 |
|
|
machine->a_few_cycles = 1048576; |
464 |
|
|
machine->ncycles_flush = 0; |
465 |
|
|
machine->ncycles = 0; |
466 |
|
|
machine->ncycles_show = 0; |
467 |
|
|
|
468 |
|
|
/* |
469 |
|
|
* Instead of doing { one cycle, check hardware ticks }, we |
470 |
|
|
* can do { n cycles, check hardware ticks }, as long as |
471 |
|
|
* n is at most as much as the lowest number of cycles/tick |
472 |
|
|
* for any hardware device. |
473 |
|
|
*/ |
474 |
|
|
for (te=0; te<machine->n_tick_entries; te++) { |
475 |
|
|
if (machine->ticks_reset_value[te] < machine->a_few_cycles) |
476 |
|
|
machine->a_few_cycles = machine->ticks_reset_value[te]; |
477 |
|
|
} |
478 |
|
|
|
479 |
|
|
machine->a_few_cycles >>= 1; |
480 |
|
|
if (machine->a_few_cycles < 1) |
481 |
|
|
machine->a_few_cycles = 1; |
482 |
|
|
|
483 |
|
|
if (ncpus > 1 && machine->max_random_cycles_per_chunk == 0) |
484 |
|
|
machine->a_few_cycles = 1; |
485 |
|
|
|
486 |
|
|
/* debug("cpu_run_init(): a_few_cycles = %i\n", |
487 |
|
|
machine->a_few_cycles); */ |
488 |
|
|
|
489 |
|
|
/* For performance measurement: */ |
490 |
|
|
gettimeofday(&machine->starttime, NULL); |
491 |
dpavlin |
10 |
machine->ncycles_since_gettimeofday = 0; |
492 |
dpavlin |
2 |
} |
493 |
|
|
|
494 |
|
|
|
495 |
|
|
/* |
496 |
|
|
* add_cpu_family(): |
497 |
|
|
* |
498 |
|
|
* Allocates a cpu_family struct and calls an init function for the |
499 |
|
|
* family to fill in reasonable data and pointers. |
500 |
|
|
*/ |
501 |
|
|
static void add_cpu_family(int (*family_init)(struct cpu_family *), int arch) |
502 |
|
|
{ |
503 |
|
|
struct cpu_family *fp, *tmp; |
504 |
|
|
int res; |
505 |
|
|
|
506 |
|
|
fp = malloc(sizeof(struct cpu_family)); |
507 |
|
|
if (fp == NULL) { |
508 |
|
|
fprintf(stderr, "add_cpu_family(): out of memory\n"); |
509 |
|
|
exit(1); |
510 |
|
|
} |
511 |
|
|
memset(fp, 0, sizeof(struct cpu_family)); |
512 |
|
|
|
513 |
|
|
/* |
514 |
|
|
* family_init() returns 1 if the struct has been filled with |
515 |
|
|
* valid data, 0 if suppor for the cpu family isn't compiled |
516 |
|
|
* into the emulator. |
517 |
|
|
*/ |
518 |
|
|
res = family_init(fp); |
519 |
|
|
if (!res) { |
520 |
|
|
free(fp); |
521 |
|
|
return; |
522 |
|
|
} |
523 |
|
|
fp->arch = arch; |
524 |
|
|
fp->next = NULL; |
525 |
|
|
|
526 |
|
|
/* Add last in family chain: */ |
527 |
|
|
tmp = first_cpu_family; |
528 |
|
|
if (tmp == NULL) { |
529 |
|
|
first_cpu_family = fp; |
530 |
|
|
} else { |
531 |
|
|
while (tmp->next != NULL) |
532 |
|
|
tmp = tmp->next; |
533 |
|
|
tmp->next = fp; |
534 |
|
|
} |
535 |
|
|
} |
536 |
|
|
|
537 |
|
|
|
538 |
|
|
/* |
539 |
|
|
* cpu_family_ptr_by_number(): |
540 |
|
|
* |
541 |
|
|
* Returns a pointer to a CPU family based on the ARCH_* integers. |
542 |
|
|
*/ |
543 |
|
|
struct cpu_family *cpu_family_ptr_by_number(int arch) |
544 |
|
|
{ |
545 |
|
|
struct cpu_family *fp; |
546 |
|
|
fp = first_cpu_family; |
547 |
|
|
|
548 |
|
|
/* YUCK! This is too hardcoded! TODO */ |
549 |
|
|
|
550 |
|
|
while (fp != NULL) { |
551 |
|
|
if (arch == fp->arch) |
552 |
|
|
return fp; |
553 |
|
|
fp = fp->next; |
554 |
|
|
} |
555 |
|
|
|
556 |
|
|
return NULL; |
557 |
|
|
} |
558 |
|
|
|
559 |
|
|
|
560 |
|
|
/* |
561 |
|
|
* cpu_init(): |
562 |
|
|
* |
563 |
|
|
* Should be called before any other cpu_*() function. |
564 |
|
|
*/ |
565 |
|
|
void cpu_init(void) |
566 |
|
|
{ |
567 |
|
|
/* Note: These are registered in alphabetic order. */ |
568 |
dpavlin |
6 |
add_cpu_family(arm_cpu_family_init, ARCH_ARM); |
569 |
dpavlin |
2 |
add_cpu_family(mips_cpu_family_init, ARCH_MIPS); |
570 |
|
|
add_cpu_family(ppc_cpu_family_init, ARCH_PPC); |
571 |
|
|
add_cpu_family(urisc_cpu_family_init, ARCH_URISC); |
572 |
dpavlin |
4 |
add_cpu_family(x86_cpu_family_init, ARCH_X86); |
573 |
dpavlin |
2 |
} |
574 |
|
|
|