| 1 |
/* |
| 2 |
* 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 |
| 5 |
* 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 |
| 10 |
* 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 |
| 17 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 |
* 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 1.298 2005/06/27 10:43:16 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> |
| 34 |
#include <stdlib.h> |
| 35 |
#include <sys/types.h> |
| 36 |
#include <string.h> |
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|
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#include "cpu.h" |
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#include "machine.h" |
| 40 |
#include "misc.h" |
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|
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|
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extern int quiet_mode; |
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extern int show_opcode_statistics; |
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|
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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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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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|
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if (name == NULL) { |
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fprintf(stderr, "cpu_new(): cpu name = NULL?\n"); |
| 65 |
exit(1); |
| 66 |
} |
| 67 |
|
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cpu_type_name = strdup(name); |
| 69 |
if (cpu_type_name == NULL) { |
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fprintf(stderr, "cpu_new(): out of memory\n"); |
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exit(1); |
| 72 |
} |
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|
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cpu = malloc(sizeof(struct cpu)); |
| 75 |
if (cpu == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
| 78 |
} |
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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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|
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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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return cpu; |
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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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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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|
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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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|
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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_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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|
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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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|
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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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|
| 198 |
|
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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); |
| 213 |
} |
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|
| 215 |
|
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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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|
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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) |
| 242 |
{ |
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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); |
| 248 |
} |
| 249 |
|
| 250 |
|
| 251 |
/* |
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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) |
| 258 |
{ |
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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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|
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if (m->cpu_family == NULL || m->cpu_family->dumpinfo == NULL) |
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fatal("cpu_dumpinfo(): NULL\n"); |
| 264 |
else |
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m->cpu_family->dumpinfo(cpu); |
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} |
| 267 |
|
| 268 |
|
| 269 |
/* |
| 270 |
* cpu_list_available_types(): |
| 271 |
* |
| 272 |
* Print a list of available CPU types for each cpu family. |
| 273 |
*/ |
| 274 |
void cpu_list_available_types(void) |
| 275 |
{ |
| 276 |
struct cpu_family *fp; |
| 277 |
int iadd = 4; |
| 278 |
|
| 279 |
fp = first_cpu_family; |
| 280 |
|
| 281 |
if (fp == NULL) { |
| 282 |
debug("No CPUs defined!\n"); |
| 283 |
return; |
| 284 |
} |
| 285 |
|
| 286 |
while (fp != NULL) { |
| 287 |
debug("%s:\n", fp->name); |
| 288 |
debug_indentation(iadd); |
| 289 |
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" |
| 293 |
" = NULL)\n"); |
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debug_indentation(-iadd); |
| 295 |
|
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fp = fp->next; |
| 297 |
} |
| 298 |
} |
| 299 |
|
| 300 |
|
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/* |
| 302 |
* cpu_run_deinit(): |
| 303 |
* |
| 304 |
* Shuts down all CPUs in a machine when ending a simulation. (This function |
| 305 |
* should only need to be called once for each machine.) |
| 306 |
*/ |
| 307 |
void cpu_run_deinit(struct emul *emul, struct machine *machine) |
| 308 |
{ |
| 309 |
int te; |
| 310 |
|
| 311 |
/* |
| 312 |
* Two last ticks of every hardware device. This will allow |
| 313 |
* framebuffers to draw the last updates to the screen before |
| 314 |
* halting. |
| 315 |
*/ |
| 316 |
for (te=0; te<machine->n_tick_entries; te++) { |
| 317 |
machine->tick_func[te](machine->cpus[0], |
| 318 |
machine->tick_extra[te]); |
| 319 |
machine->tick_func[te](machine->cpus[0], |
| 320 |
machine->tick_extra[te]); |
| 321 |
} |
| 322 |
|
| 323 |
debug("cpu_run_deinit(): All CPUs halted.\n"); |
| 324 |
|
| 325 |
if (machine->show_nr_of_instructions || !quiet_mode) |
| 326 |
cpu_show_cycles(machine, 1); |
| 327 |
|
| 328 |
if (show_opcode_statistics) |
| 329 |
cpu_show_full_statistics(machine); |
| 330 |
|
| 331 |
fflush(stdout); |
| 332 |
} |
| 333 |
|
| 334 |
|
| 335 |
/* |
| 336 |
* cpu_show_cycles(): |
| 337 |
* |
| 338 |
* If automatic adjustment of clock interrupts is turned on, then recalculate |
| 339 |
* emulated_hz. Also, if show_nr_of_instructions is on, then print a |
| 340 |
* line to stdout about how many instructions/cycles have been executed so |
| 341 |
* far. |
| 342 |
*/ |
| 343 |
void cpu_show_cycles(struct machine *machine, int forced) |
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{ |
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uint64_t offset, pc; |
| 346 |
int is_32bit = 0, instrs_per_cycle = 1; |
| 347 |
char *symbol; |
| 348 |
int64_t mseconds, ninstrs; |
| 349 |
struct timeval tv; |
| 350 |
int h, m, s, ms, d; |
| 351 |
|
| 352 |
static int64_t mseconds_last = 0; |
| 353 |
static int64_t ninstrs_last = -1; |
| 354 |
|
| 355 |
switch (machine->arch) { |
| 356 |
case ARCH_MIPS: |
| 357 |
if (machine->cpus[machine->bootstrap_cpu]->cd.mips. |
| 358 |
cpu_type.isa_level < 3 || machine->cpus[machine-> |
| 359 |
bootstrap_cpu]->cd.mips.cpu_type.isa_level == 32) |
| 360 |
is_32bit = 1; |
| 361 |
instrs_per_cycle = machine->cpus[machine->bootstrap_cpu]-> |
| 362 |
cd.mips.cpu_type.instrs_per_cycle; |
| 363 |
break; |
| 364 |
case ARCH_ARM: |
| 365 |
is_32bit = 1; |
| 366 |
break; |
| 367 |
} |
| 368 |
|
| 369 |
pc = machine->cpus[machine->bootstrap_cpu]->pc; |
| 370 |
|
| 371 |
gettimeofday(&tv, NULL); |
| 372 |
mseconds = (tv.tv_sec - machine->starttime.tv_sec) * 1000 |
| 373 |
+ (tv.tv_usec - machine->starttime.tv_usec) / 1000; |
| 374 |
|
| 375 |
if (mseconds == 0) |
| 376 |
mseconds = 1; |
| 377 |
|
| 378 |
if (mseconds - mseconds_last == 0) |
| 379 |
mseconds ++; |
| 380 |
|
| 381 |
ninstrs = machine->ncycles_since_gettimeofday * instrs_per_cycle; |
| 382 |
|
| 383 |
if (machine->automatic_clock_adjustment) { |
| 384 |
static int first_adjustment = 1; |
| 385 |
|
| 386 |
/* Current nr of cycles per second: */ |
| 387 |
int64_t cur_cycles_per_second = 1000 * |
| 388 |
(ninstrs-ninstrs_last) / (mseconds-mseconds_last) |
| 389 |
/ instrs_per_cycle; |
| 390 |
|
| 391 |
if (cur_cycles_per_second < 1000000) |
| 392 |
cur_cycles_per_second = 1000000; |
| 393 |
|
| 394 |
if (first_adjustment) { |
| 395 |
machine->emulated_hz = cur_cycles_per_second; |
| 396 |
first_adjustment = 0; |
| 397 |
} else { |
| 398 |
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 |
printf("[ %lli instrs", |
| 412 |
(long long)(machine->ncycles * instrs_per_cycle)); |
| 413 |
|
| 414 |
if (!machine->automatic_clock_adjustment) { |
| 415 |
d = machine->emulated_hz / 1000; |
| 416 |
if (d < 1) |
| 417 |
d = 1; |
| 418 |
ms = machine->ncycles / d; |
| 419 |
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 |
printf("; i/s=%lli avg=%lli; ", |
| 431 |
(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 |
printf("pc=0x%08x", (int)pc); |
| 439 |
else |
| 440 |
printf("pc=0x%016llx", (long long)pc); |
| 441 |
|
| 442 |
if (symbol != NULL) |
| 443 |
printf(" <%s>", symbol); |
| 444 |
printf(" ]\n"); |
| 445 |
|
| 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 |
machine->ncycles_since_gettimeofday = 0; |
| 492 |
} |
| 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 |
add_cpu_family(arm_cpu_family_init, ARCH_ARM); |
| 569 |
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 |
add_cpu_family(x86_cpu_family_init, ARCH_X86); |
| 573 |
} |
| 574 |
|
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