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[/] [openrisc/] [tags/] [gnu-src/] [gdb-6.8/] [pre-binutils-2.20.1-sync/] [sim/] [m32c/] [mem.c] - Rev 594
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/* mem.c --- memory for M32C simulator. Copyright (C) 2005, 2007, 2008 Free Software Foundation, Inc. Contributed by Red Hat, Inc. This file is part of the GNU simulators. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it 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 this program. If not, see <http://www.gnu.org/licenses/>. */ #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 · ", "\033[0m · ", "\033[0m · " }; 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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