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6df01ab8ab
The defs.h header will take care of including the various config.h headers. For now, it's just config.h, but we'll add more when we integrate gnulib in. This header should be used instead of config.h, and should be the first include in every .c file. We won't rely on the old behavior where we expected files to include the port's sim-main.h which then includes the common sim-basics.h which then includes config.h. We have a ton of code that includes things before sim-main.h, and it sometimes needs to be that way. Creating a dedicated header avoids the ordering mess and implicit inclusion that shows up otherwise.
623 lines
12 KiB
C
623 lines
12 KiB
C
/* mem.c --- memory for M32C simulator.
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Copyright (C) 2005-2021 Free Software Foundation, Inc.
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Contributed by Red Hat, Inc.
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This file is part of the GNU simulators.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This must come before any other includes. */
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#include "defs.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#ifdef HAVE_TERMIOS_H
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#include <termios.h>
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#endif
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#include "mem.h"
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#include "cpu.h"
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#include "syscalls.h"
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#include "misc.h"
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#ifdef TIMER_A
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#include "int.h"
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#include "timer_a.h"
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#endif
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#define L1_BITS (10)
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#define L2_BITS (10)
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#define OFF_BITS (12)
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#define L1_LEN (1 << L1_BITS)
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#define L2_LEN (1 << L2_BITS)
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#define OFF_LEN (1 << OFF_BITS)
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static unsigned char **pt[L1_LEN];
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#ifdef HAVE_TERMIOS_H
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int m32c_console_ifd = 0;
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#endif
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int m32c_console_ofd = 1;
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#ifdef HAVE_TERMIOS_H
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int m32c_use_raw_console = 0;
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#endif
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#ifdef TIMER_A
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Timer_A timer_a;
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#endif
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/* [ get=0/put=1 ][ byte size ] */
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static unsigned int mem_counters[2][5];
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#define COUNT(isput,bytes) \
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if (verbose && enable_counting) mem_counters[isput][bytes]++
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void
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init_mem (void)
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{
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int i, j;
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for (i = 0; i < L1_LEN; i++)
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if (pt[i])
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{
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for (j = 0; j < L2_LEN; j++)
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if (pt[i][j])
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free (pt[i][j]);
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free (pt[i]);
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}
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memset (pt, 0, sizeof (pt));
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memset (mem_counters, 0, sizeof (mem_counters));
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}
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static unsigned char *
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mem_ptr (int address)
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{
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static int recursing = 0;
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int pt1 = (address >> (L2_BITS + OFF_BITS)) & ((1 << L1_BITS) - 1);
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int pt2 = (address >> OFF_BITS) & ((1 << L2_BITS) - 1);
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int pto = address & ((1 << OFF_BITS) - 1);
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if (address == 0 && !recursing)
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{
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recursing = 1;
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put_reg (pc, m32c_opcode_pc);
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printf ("NULL pointer dereference at pc=0x%x\n", get_reg (pc));
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step_result = M32C_MAKE_HIT_BREAK ();
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#if 0
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/* This code can be re-enabled to help diagnose NULL pointer
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bugs that aren't debuggable in GDB. */
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m32c_dump_all_registers ();
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exit (1);
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#endif
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}
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if (pt[pt1] == 0)
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pt[pt1] = (unsigned char **) calloc (L2_LEN, sizeof (char **));
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if (pt[pt1][pt2] == 0)
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{
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pt[pt1][pt2] = (unsigned char *) malloc (OFF_LEN);
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memset (pt[pt1][pt2], 0, OFF_LEN);
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}
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return pt[pt1][pt2] + pto;
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}
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static void
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used (int rstart, int i, int j)
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{
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int rend = i << (L2_BITS + OFF_BITS);
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rend += j << OFF_BITS;
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if (rstart == 0xe0000 && rend == 0xe1000)
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return;
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printf ("mem: %08x - %08x (%dk bytes)\n", rstart, rend - 1,
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(rend - rstart) / 1024);
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}
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static char *
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mcs (int isput, int bytes)
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{
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return comma (mem_counters[isput][bytes]);
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}
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void
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mem_usage_stats (void)
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{
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int i, j;
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int rstart = 0;
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int pending = 0;
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for (i = 0; i < L1_LEN; i++)
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if (pt[i])
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{
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for (j = 0; j < L2_LEN; j++)
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if (pt[i][j])
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{
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if (!pending)
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{
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pending = 1;
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rstart = (i << (L2_BITS + OFF_BITS)) + (j << OFF_BITS);
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}
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}
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else if (pending)
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{
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pending = 0;
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used (rstart, i, j);
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}
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}
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else
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{
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if (pending)
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{
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pending = 0;
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used (rstart, i, 0);
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}
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}
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/* mem foo: 123456789012 123456789012 123456789012 123456789012
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123456789012 */
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printf (" byte short pointer long"
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" fetch\n");
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printf ("mem get: %12s %12s %12s %12s %12s\n", mcs (0, 1), mcs (0, 2),
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mcs (0, 3), mcs (0, 4), mcs (0, 0));
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printf ("mem put: %12s %12s %12s %12s\n", mcs (1, 1), mcs (1, 2),
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mcs (1, 3), mcs (1, 4));
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}
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static int tpr = 0;
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static void
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s (int address, char *dir)
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{
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if (tpr == 0)
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printf ("MEM[%0*x] %s", membus_mask == 0xfffff ? 5 : 6, address, dir);
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tpr++;
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}
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#define S(d) if (trace) s(address, d)
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static void
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e (void)
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{
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if (!trace)
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return;
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tpr--;
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if (tpr == 0)
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printf ("\n");
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}
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#define E() if (trace) e()
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extern int m32c_disassemble;
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static void
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mem_put_byte (int address, unsigned char value)
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{
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unsigned char *m;
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address &= membus_mask;
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m = mem_ptr (address);
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if (trace)
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printf (" %02x", value);
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*m = value;
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switch (address)
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{
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case 0x00e1:
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{
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static int old_led = -1;
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static char *led_on[] =
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{ "\033[31m O ", "\033[32m O ", "\033[34m O " };
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static char *led_off[] = { "\033[0m <20> ", "\033[0m <20> ", "\033[0m <20> " };
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int i;
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if (old_led != value)
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{
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fputs (" ", stdout);
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for (i = 0; i < 3; i++)
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if (value & (1 << i))
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fputs (led_off[i], stdout);
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else
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fputs (led_on[i], stdout);
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fputs ("\033[0m\r", stdout);
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fflush (stdout);
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old_led = value;
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}
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}
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break;
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#ifdef TIMER_A
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/* M32C Timer A */
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case 0x346: /* TA0low */
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timer_a.count = (timer_a.count & 0xff00) | value;
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timer_a.reload = timer_a.count;
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break;
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case 0x347: /* TA0high */
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timer_a.count = (timer_a.count & 0x00ff) | (value << 8);
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timer_a.reload = timer_a.count;
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break;
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case 0x340: /* TABSR */
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timer_a.bsr = value;
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break;
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case 0x356: /* TA0MR */
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timer_a.mode = value;
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break;
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case 0x35f: /* TCSPR */
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timer_a.tcspr = value;
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break;
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case 0x006c: /* TA0IC */
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timer_a.ic = value;
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break;
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/* R8C Timer RA */
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case 0x100: /* TRACR */
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timer_a.bsr = value;
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break;
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case 0x102: /* TRAMR */
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timer_a.mode = value;
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break;
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case 0x104: /* TRA */
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timer_a.count = value;
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timer_a.reload = value;
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break;
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case 0x103: /* TRAPRE */
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timer_a.tcspr = value;
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break;
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case 0x0056: /* TA0IC */
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timer_a.ic = value;
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break;
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#endif
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case 0x2ea: /* m32c uart1tx */
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case 0x3aa: /* m16c uart1tx */
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{
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static int pending_exit = 0;
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if (value == 0)
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{
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if (pending_exit)
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{
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step_result = M32C_MAKE_EXITED (value);
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return;
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}
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pending_exit = 1;
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}
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else
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{
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if (write (m32c_console_ofd, &value, 1) != 1)
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printf ("write console failed: %s\n", strerror (errno));
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}
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}
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break;
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case 0x400:
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m32c_syscall (value);
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break;
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case 0x401:
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putchar (value);
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break;
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case 0x402:
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printf ("SimTrace: %06lx %02x\n", regs.r_pc, value);
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break;
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case 0x403:
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printf ("SimTrap: %06lx %02x\n", regs.r_pc, value);
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abort ();
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}
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}
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void
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mem_put_qi (int address, unsigned char value)
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{
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S ("<=");
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mem_put_byte (address, value & 0xff);
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E ();
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COUNT (1, 1);
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}
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void
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mem_put_hi (int address, unsigned short value)
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{
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if (address == 0x402)
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{
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printf ("SimTrace: %06lx %04x\n", regs.r_pc, value);
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return;
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}
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S ("<=");
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mem_put_byte (address, value & 0xff);
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mem_put_byte (address + 1, value >> 8);
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E ();
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COUNT (1, 2);
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}
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void
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mem_put_psi (int address, unsigned long value)
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{
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S ("<=");
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mem_put_byte (address, value & 0xff);
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mem_put_byte (address + 1, (value >> 8) & 0xff);
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mem_put_byte (address + 2, value >> 16);
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E ();
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COUNT (1, 3);
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}
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void
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mem_put_si (int address, unsigned long value)
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{
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S ("<=");
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mem_put_byte (address, value & 0xff);
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mem_put_byte (address + 1, (value >> 8) & 0xff);
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mem_put_byte (address + 2, (value >> 16) & 0xff);
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mem_put_byte (address + 3, (value >> 24) & 0xff);
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E ();
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COUNT (1, 4);
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}
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void
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mem_put_blk (int address, const void *bufptr, int nbytes)
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{
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const unsigned char *buf = bufptr;
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S ("<=");
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if (enable_counting)
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mem_counters[1][1] += nbytes;
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while (nbytes--)
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mem_put_byte (address++, *buf++);
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E ();
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}
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unsigned char
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mem_get_pc (void)
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{
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unsigned char *m = mem_ptr (regs.r_pc & membus_mask);
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COUNT (0, 0);
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return *m;
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}
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#ifdef HAVE_TERMIOS_H
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static int console_raw = 0;
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static struct termios oattr;
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static int
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stdin_ready (void)
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{
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fd_set ifd;
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int n;
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struct timeval t;
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t.tv_sec = 0;
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t.tv_usec = 0;
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FD_ZERO (&ifd);
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FD_SET (m32c_console_ifd, &ifd);
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n = select (1, &ifd, 0, 0, &t);
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return n > 0;
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}
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void
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m32c_sim_restore_console (void)
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{
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if (console_raw)
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tcsetattr (m32c_console_ifd, TCSANOW, &oattr);
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console_raw = 0;
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}
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#endif
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static unsigned char
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mem_get_byte (int address)
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{
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unsigned char *m;
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address &= membus_mask;
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m = mem_ptr (address);
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switch (address)
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{
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#ifdef HAVE_TERMIOS_H
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case 0x2ed: /* m32c uart1c1 */
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case 0x3ad: /* m16c uart1c1 */
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if (!console_raw && m32c_use_raw_console)
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{
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struct termios attr;
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tcgetattr (m32c_console_ifd, &attr);
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tcgetattr (m32c_console_ifd, &oattr);
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/* We want each key to be sent as the user presses them. */
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attr.c_lflag &= ~(ICANON | ECHO | ECHOE);
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tcsetattr (m32c_console_ifd, TCSANOW, &attr);
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console_raw = 1;
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atexit (m32c_sim_restore_console);
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}
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if (stdin_ready ())
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return 0x02; /* tx empty and rx full */
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else
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return 0x0a; /* transmitter empty */
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case 0x2ee: /* m32c uart1 rx */
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{
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char c;
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if (read (m32c_console_ifd, &c, 1) != 1)
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return 0;
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if (m32c_console_ifd == 0 && c == 3) /* Ctrl-C */
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{
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printf ("Ctrl-C!\n");
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exit (0);
|
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}
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|
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if (m32c_console_ifd != 1)
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{
|
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if (isgraph (c))
|
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printf ("\033[31m%c\033[0m", c);
|
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else
|
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printf ("\033[31m%02x\033[0m", c);
|
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}
|
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return c;
|
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}
|
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#endif
|
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|
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#ifdef TIMER_A
|
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case 0x346: /* TA0low */
|
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return timer_a.count & 0xff;
|
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case 0x347: /* TA0high */
|
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return (timer_a.count >> 8) & 0xff;
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case 0x104: /* TRA */
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return timer_a.count;
|
||
#endif
|
||
|
||
default:
|
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/* In case both cases above are not included. */
|
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;
|
||
}
|
||
|
||
S ("=>");
|
||
if (trace)
|
||
printf (" %02x", *m);
|
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E ();
|
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return *m;
|
||
}
|
||
|
||
unsigned char
|
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mem_get_qi (int address)
|
||
{
|
||
unsigned char rv;
|
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S ("=>");
|
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rv = mem_get_byte (address);
|
||
COUNT (0, 1);
|
||
E ();
|
||
return rv;
|
||
}
|
||
|
||
unsigned short
|
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mem_get_hi (int address)
|
||
{
|
||
unsigned short rv;
|
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S ("=>");
|
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rv = mem_get_byte (address);
|
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rv |= mem_get_byte (address + 1) * 256;
|
||
COUNT (0, 2);
|
||
E ();
|
||
return rv;
|
||
}
|
||
|
||
unsigned long
|
||
mem_get_psi (int address)
|
||
{
|
||
unsigned long rv;
|
||
S ("=>");
|
||
rv = mem_get_byte (address);
|
||
rv |= mem_get_byte (address + 1) * 256;
|
||
rv |= mem_get_byte (address + 2) * 65536;
|
||
COUNT (0, 3);
|
||
E ();
|
||
return rv;
|
||
}
|
||
|
||
unsigned long
|
||
mem_get_si (int address)
|
||
{
|
||
unsigned long rv;
|
||
S ("=>");
|
||
rv = mem_get_byte (address);
|
||
rv |= mem_get_byte (address + 1) << 8;
|
||
rv |= mem_get_byte (address + 2) << 16;
|
||
rv |= mem_get_byte (address + 3) << 24;
|
||
COUNT (0, 4);
|
||
E ();
|
||
return rv;
|
||
}
|
||
|
||
void
|
||
mem_get_blk (int address, void *bufptr, int nbytes)
|
||
{
|
||
char *buf = bufptr;
|
||
|
||
S ("=>");
|
||
if (enable_counting)
|
||
mem_counters[0][1] += nbytes;
|
||
while (nbytes--)
|
||
*buf++ = mem_get_byte (address++);
|
||
E ();
|
||
}
|
||
|
||
int
|
||
sign_ext (int v, int bits)
|
||
{
|
||
if (bits < 32)
|
||
{
|
||
v &= (1 << bits) - 1;
|
||
if (v & (1 << (bits - 1)))
|
||
v -= (1 << bits);
|
||
}
|
||
return v;
|
||
}
|
||
|
||
#if TIMER_A
|
||
void
|
||
update_timer_a (void)
|
||
{
|
||
if (timer_a.bsr & 1)
|
||
{
|
||
timer_a.prescale--;
|
||
if (timer_a.prescale < 0)
|
||
{
|
||
if (A24)
|
||
{
|
||
switch (timer_a.mode & 0xc0)
|
||
{
|
||
case 0x00:
|
||
timer_a.prescale = 0;
|
||
break;
|
||
case 0x40:
|
||
timer_a.prescale = 8;
|
||
break;
|
||
case 0x80:
|
||
timer_a.prescale = timer_a.tcspr & 0x0f;
|
||
break;
|
||
case 0xc0:
|
||
timer_a.prescale = 32;
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
timer_a.prescale = timer_a.tcspr;
|
||
}
|
||
timer_a.count--;
|
||
if (timer_a.count < 0)
|
||
{
|
||
timer_a.count = timer_a.reload;
|
||
if (timer_a.ic & 7)
|
||
{
|
||
if (A24)
|
||
mem_put_qi (0x6c, timer_a.ic | 0x08);
|
||
else
|
||
mem_put_qi (0x56, timer_a.ic | 0x08);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (regs.r_flags & FLAGBIT_I /* interrupts enabled */
|
||
&& timer_a.ic & 0x08 /* timer A interrupt triggered */
|
||
&& (timer_a.ic & 0x07) > ((regs.r_flags >> 12) & 0x07))
|
||
{
|
||
if (A24)
|
||
trigger_peripheral_interrupt (12, 0x06c);
|
||
else
|
||
trigger_peripheral_interrupt (22, 0x056);
|
||
}
|
||
}
|
||
#endif
|