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# storage.c

    00001 /*
    00002  * $Id: storage.c,v 1.8 2003/12/02 08:25:00 troth Exp $
    00003  *
    00004  ****************************************************************************
    00005  *
    00006  * simulavr - A simulator for the Atmel AVR family of microcontrollers.
    00007  * Copyright (C) 2001, 2002, 2003  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 "storage.h"
    00035
    00036 /***************************************************************************\
    00037  *
    00038  * Storage(AvrClass) Methods
    00039  *
    00040 \***************************************************************************/
    00041
    00042 Storage *
    00043 storage_new (int base, int size)
    00044 {
    00045     Storage *stor;
    00046
    00047     stor = avr_new (Storage, 1);
    00048     storage_construct (stor, base, size);
    00049     class_overload_destroy ((AvrClass *)stor, storage_destroy);
    00050
    00051     return stor;
    00052 }
    00053
    00054 void
    00055 storage_construct (Storage *stor, int base, int size)
    00056 {
    00057     if (stor == NULL)
    00058         avr_error ("passed null ptr");
    00059
    00060     class_construct ((AvrClass *)stor);
    00061
    00062     stor->base = base;          /* address */
    00063     stor->size = size;          /* bytes   */
    00064
    00065     stor->data = avr_new0 (uint8_t, size);
    00066 }
    00067
    00068 /*
    00069  * Not to be called directly, except by a derived class.
    00070  * Called via class_unref.
    00071  */
    00072 void
    00073 storage_destroy (void *stor)
    00074 {
    00075     if (stor == NULL)
    00076         return;
    00077
    00078     avr_free (((Storage *)stor)->data);
    00079     class_destroy (stor);
    00080 }
    00081
    00082 extern inline uint8_t
    00083 storage_readb (Storage *stor, int addr);
    00084
    00085 extern inline uint16_t
    00086 storage_readw (Storage *stor, int addr);
    00087
    00088 void
    00089 storage_writeb (Storage *stor, int addr, uint8_t val)
    00090 {
    00091     int _addr = addr - stor->base;
    00092
    00093     if (stor == NULL)
    00094         avr_error ("passed null ptr");
    00095
    00096     if ((_addr < 0) || (_addr >= stor->size))
    00097         avr_error ("address out of bounds: 0x%x", addr);
    00098
    00099     stor->data[_addr] = val;
    00100 }
    00101
    00102 void
    00103 storage_writew (Storage *stor, int addr, uint16_t val)
    00104 {
    00105     int _addr = addr - stor->base;
    00106
    00107     if (stor == NULL)
    00108         avr_error ("passed null ptr");
    00109
    00110     if ((_addr < 0) || (_addr >= stor->size))
    00111         avr_error ("address out of bounds: 0x%x", addr);
    00112
    00113     stor->data[_addr] = (uint8_t) (val >> 8 & 0xff);
    00114     stor->data[_addr + 1] = (uint8_t) (val & 0xff);
    00115 }
    00116
    00117 int
    00118 storage_get_size (Storage *stor)
    00119 {
    00120     return stor->size;
    00121 }
    00122
    00123 int
    00124 storage_get_base (Storage *stor)
    00125 {
    00126     return stor->base;
    00127 }

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