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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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