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# sram.c

    00001 /*
    00002  * $Id: sram.c,v 1.10 2004/01/30 07:09:56 troth Exp $
    00003  *
    00004  ****************************************************************************
    00005  *
    00006  * simulavr - A simulator for the Atmel AVR family of microcontrollers.
    00007  * Copyright (C) 2001, 2002, 2003, 2004  Theodore A. Roth
    00008  *
    00009  * This program is free software; you can redistribute it and/or modify
    00010  * it under the terms of the GNU General Public License as published by
    00011  * the Free Software Foundation; either version 2 of the License, or
    00012  * (at your option) any later version.
    00013  *
    00014  * This program is distributed in the hope that it will be useful,
    00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00017  * GNU General Public License for more details.
    00018  *
    00019  * You should have received a copy of the GNU General Public License
    00020  * along with this program; if not, write to the Free Software
    00021  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00022  *
    00023  ****************************************************************************
    00024  */
    00025
    00026 #include <config.h>
    00027
    00028 #include <stdio.h>
    00029 #include <stdlib.h>
    00030
    00031 #include "avrerror.h"
    00032 #include "avrmalloc.h"
    00033 #include "avrclass.h"
    00034 #include "utils.h"
    00035 #include "callback.h"
    00036 #include "op_names.h"
    00037
    00038 #include "storage.h"
    00039 #include "flash.h"
    00040
    00041 #include "vdevs.h"
    00042 #include "memory.h"
    00043 #include "stack.h"
    00044 #include "register.h"
    00045 #include "sram.h"
    00046 #include "eeprom.h"
    00047 #include "timers.h"
    00048 #include "ports.h"
    00049
    00050 #include "avrcore.h"
    00051
    00052 #include "display.h"
    00053
    00054 static uint8_t sram_read (VDevice *dev, int addr);
    00055 static void sram_write (VDevice *dev, int addr, uint8_t val);
    00056 static void sram_reset (VDevice *dev);
    00057
    00058 SRAM *
    00059 sram_new (int base, int size)
    00060 {
    00061     SRAM *sram;
    00062
    00063     sram = avr_new (SRAM, 1);
    00064     sram_construct (sram, base, size);
    00065     class_overload_destroy ((AvrClass *)sram, sram_destroy);
    00066
    00067     return sram;
    00068 }
    00069
    00070 void
    00071 sram_construct (SRAM *sram, int base, int size)
    00072 {
    00073     if (sram == NULL)
    00074         avr_error ("passed null ptr");
    00075
    00076     sram->stor = storage_new (base, size);
    00077     vdev_construct ((VDevice *)sram, sram_read, sram_write, sram_reset,
    00078                     vdev_def_AddAddr);
    00079 }
    00080
    00081 void
    00082 sram_destroy (void *sram)
    00083 {
    00084     SRAM *_sram = (SRAM *)sram;
    00085
    00086     if (sram == NULL)
    00087         return;
    00088
    00089     class_unref ((AvrClass *)_sram->stor);
    00090
    00091     vdev_destroy (sram);
    00092 }
    00093
    00094 int
    00095 sram_get_size (SRAM *sram)
    00096 {
    00097     return storage_get_size (sram->stor);
    00098 }
    00099
    00100 int
    00101 sram_get_base (SRAM *sram)
    00102 {
    00103     return storage_get_base (sram->stor);
    00104 }
    00105
    00106 static uint8_t
    00107 sram_read (VDevice *dev, int addr)
    00108 {
    00109     SRAM *sram = (SRAM *)dev;
    00110
    00111     return storage_readb (sram->stor, addr);
    00112 }
    00113
    00114 static void
    00115 sram_write (VDevice *dev, int addr, uint8_t val)
    00116 {
    00117     SRAM *sram = (SRAM *)dev;
    00118
    00119     display_sram (addr, 1, &val);
    00120
    00121     storage_writeb (sram->stor, addr, val);
    00122 }
    00123
    00124 static void
    00125 sram_reset (VDevice *dev)
    00126 {
    00127     return;                     /* FIXME: should the array be cleared? */
    00128 }

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