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old-cross-binutils/sim/m32c/mem.c
DJ Delorie 727b6b4b41 * mem.c (mem_put_byte): Hook simulated UART to stdout. 
(mem_put_hi): Hook in simulated trace port.
(mem_get_byte): Hook in simulated uart control port.
* opc2c: Be more picky about matching special comments.
* r8c.opc (shift_op): Limit shift counts to -16..16.
(BMcnd): Map conditional codes.
* reg.c (condition_true): Mask condition code to 4 bits.
* syscalls.c: Include local syscall.h.
* syscall.h: New, copied from libgloss.
2006-03-14 03:34:28 +00:00

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/* mem.c --- memory for M32C simulator.
Copyright (C) 2005 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.
This file is part of the GNU simulators.
The GNU simulators are free software; you can redistribute them and/or
modify them under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU simulators are distributed in the hope that they will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU simulators; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mem.h"
#include "cpu.h"
#include "syscalls.h"
#include "misc.h"
#define L1_BITS (10)
#define L2_BITS (10)
#define OFF_BITS (12)
#define L1_LEN (1 << L1_BITS)
#define L2_LEN (1 << L2_BITS)
#define OFF_LEN (1 << OFF_BITS)
static unsigned char **pt[L1_LEN];
/* [ get=0/put=1 ][ byte size ] */
static unsigned int mem_counters[2][4];
#define COUNT(isput,bytes) \
if (verbose && enable_counting) mem_counters[isput][bytes]++
void
init_mem (void)
{
int i, j;
for (i = 0; i < L1_LEN; i++)
if (pt[i])
{
for (j = 0; j < L2_LEN; j++)
if (pt[i][j])
free (pt[i][j]);
free (pt[i]);
}
memset (pt, 0, sizeof (pt));
memset (mem_counters, 0, sizeof (mem_counters));
}
static unsigned char *
mem_ptr (address)
{
int pt1 = (address >> (L2_BITS + OFF_BITS)) & ((1 << L1_BITS) - 1);
int pt2 = (address >> OFF_BITS) & ((1 << L2_BITS) - 1);
int pto = address & ((1 << OFF_BITS) - 1);
if (address == 0)
{
printf ("NULL pointer dereference\n");
exit (1);
}
if (pt[pt1] == 0)
pt[pt1] = (unsigned char **) calloc (L2_LEN, sizeof (char **));
if (pt[pt1][pt2] == 0)
{
pt[pt1][pt2] = (unsigned char *) malloc (OFF_LEN);
memset (pt[pt1][pt2], 0, OFF_LEN);
}
return pt[pt1][pt2] + pto;
}
static void
used (int rstart, int i, int j)
{
int rend = i << (L2_BITS + OFF_BITS);
rend += j << OFF_BITS;
if (rstart == 0xe0000 && rend == 0xe1000)
return;
printf ("mem: %08x - %08x (%dk bytes)\n", rstart, rend - 1,
(rend - rstart) / 1024);
}
static char *
mcs (int isput, int bytes)
{
return comma (mem_counters[isput][bytes]);
}
void
mem_usage_stats ()
{
int i, j;
int rstart = 0;
int pending = 0;
for (i = 0; i < L1_LEN; i++)
if (pt[i])
{
for (j = 0; j < L2_LEN; j++)
if (pt[i][j])
{
if (!pending)
{
pending = 1;
rstart = (i << (L2_BITS + OFF_BITS)) + (j << OFF_BITS);
}
}
else if (pending)
{
pending = 0;
used (rstart, i, j);
}
}
else
{
if (pending)
{
pending = 0;
used (rstart, i, 0);
}
}
/* mem foo: 123456789012 123456789012 123456789012 123456789012
123456789012 */
printf (" byte short pointer long"
" fetch\n");
printf ("mem get: %12s %12s %12s %12s %12s\n", mcs (0, 1), mcs (0, 2),
mcs (0, 3), mcs (0, 4), mcs (0, 0));
printf ("mem put: %12s %12s %12s %12s\n", mcs (1, 1), mcs (1, 2),
mcs (1, 3), mcs (1, 4));
}
static int tpr = 0;
static void
s (int address, char *dir)
{
if (tpr == 0)
printf ("MEM[%0*x] %s", membus_mask == 0xfffff ? 5 : 6, address, dir);
tpr++;
}
#define S(d) if (trace) s(address, d)
static void
e ()
{
if (!trace)
return;
tpr--;
if (tpr == 0)
printf ("\n");
}
#define E() if (trace) e()
void
mem_put_byte (int address, unsigned char value)
{
unsigned char *m;
address &= membus_mask;
m = mem_ptr (address);
if (trace)
printf (" %02x", value);
*m = value;
switch (address)
{
case 0x00e1:
{
static int old_led = -1;
static char *led_on[] =
{ "\033[31m O ", "\033[32m O ", "\033[34m O " };
static char *led_off[] = { "\033[0m <20> ", "\033[0m <20> ", "\033[0m <20> " };
int i;
if (old_led != value)
{
fputs (" ", stdout);
for (i = 0; i < 3; i++)
if (value & (1 << i))
fputs (led_off[i], stdout);
else
fputs (led_on[i], stdout);
fputs ("\033[0m\r", stdout);
fflush (stdout);
old_led = value;
}
}
break;
case 0x3aa: /* uart1tx */
{
static int pending_exit = 0;
if (value == 0)
{
if (pending_exit)
{
step_result = M32C_MAKE_EXITED(value);
return;
}
pending_exit = 1;
}
else
putchar(value);
}
break;
case 0x400:
m32c_syscall (value);
break;
case 0x401:
putchar (value);
break;
case 0x402:
printf ("SimTrace: %06lx %02x\n", regs.r_pc, value);
break;
case 0x403:
printf ("SimTrap: %06lx %02x\n", regs.r_pc, value);
abort ();
}
}
void
mem_put_qi (int address, unsigned char value)
{
S ("<=");
mem_put_byte (address, value & 0xff);
E ();
COUNT (1, 1);
}
void
mem_put_hi (int address, unsigned short value)
{
if (address == 0x402)
{
printf ("SimTrace: %06lx %04x\n", regs.r_pc, value);
return;
}
S ("<=");
mem_put_byte (address, value & 0xff);
mem_put_byte (address + 1, value >> 8);
E ();
COUNT (1, 2);
}
void
mem_put_psi (int address, unsigned long value)
{
S ("<=");
mem_put_byte (address, value & 0xff);
mem_put_byte (address + 1, (value >> 8) & 0xff);
mem_put_byte (address + 2, value >> 16);
E ();
COUNT (1, 3);
}
void
mem_put_si (int address, unsigned long value)
{
S ("<=");
mem_put_byte (address, value & 0xff);
mem_put_byte (address + 1, (value >> 8) & 0xff);
mem_put_byte (address + 2, (value >> 16) & 0xff);
mem_put_byte (address + 3, (value >> 24) & 0xff);
E ();
COUNT (1, 4);
}
void
mem_put_blk (int address, void *bufptr, int nbytes)
{
S ("<=");
if (enable_counting)
mem_counters[1][1] += nbytes;
while (nbytes--)
mem_put_byte (address++, *(unsigned char *) bufptr++);
E ();
}
unsigned char
mem_get_pc ()
{
unsigned char *m = mem_ptr (regs.r_pc & membus_mask);
COUNT (0, 0);
return *m;
}
static unsigned char
mem_get_byte (int address)
{
unsigned char *m;
address &= membus_mask;
S ("=>");
m = mem_ptr (address);
switch (address)
{
case 0x3ad: /* uart1c1 */
E();
return 2; /* transmitter empty */
break;
default:
if (trace)
printf (" %02x", *m);
break;
}
E ();
return *m;
}
unsigned char
mem_get_qi (int address)
{
unsigned char rv;
S ("=>");
rv = mem_get_byte (address);
COUNT (0, 1);
E ();
return rv;
}
unsigned short
mem_get_hi (int address)
{
unsigned short rv;
S ("=>");
rv = mem_get_byte (address);
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)
{
S ("=>");
if (enable_counting)
mem_counters[0][1] += nbytes;
while (nbytes--)
*(char *) bufptr++ = 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;
}
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