Contiki-NG
xmem.c
1 /*
2  * Copyright (c) 2004, Swedish Institute of Computer Science.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the Institute nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * This file is part of the Contiki operating system.
30  *
31  * Author: Adam Dunkels <adam@sics.se>
32  *
33  */
34 
35 #include "contiki.h"
36 #include "dev/xmem.h"
37 
38 #include <stdio.h>
39 #include <fcntl.h>
40 #include <unistd.h>
41 #include <stdio.h>
42 #include <string.h>
43 
44 #define XMEM_SIZE 1024 * 1024
45 
46 static unsigned char xmem[XMEM_SIZE];
47 /*---------------------------------------------------------------------------*/
48 int
49 xmem_pwrite(const void *buf, int size, unsigned long offset)
50 {
51  /* int f;
52  char name[400];
53 
54  snprintf(name, sizeof(name), "xmem.%d.%d", node_x(), node_y());
55  f = open(name, O_WRONLY | O_APPEND | O_CREAT, 0644);
56  lseek(f, addr, SEEK_SET);
57  write(f, buf, size);
58  close(f);*/
59 
60  /* printf("xmem_write(offset 0x%02x, buf %p, size %l);\n", offset, buf, size);*/
61 
62  memcpy(&xmem[offset], buf, size);
63  return size;
64 }
65 /*---------------------------------------------------------------------------*/
66 int
67 xmem_pread(void *buf, int size, unsigned long offset)
68 {
69  /* printf("xmem_read(addr 0x%02x, buf %p, size %d);\n", addr, buf, size);*/
70  memcpy(buf, &xmem[offset], size);
71  return size;
72 }
73 /*---------------------------------------------------------------------------*/
74 int
75 xmem_erase(long nbytes, unsigned long offset)
76 {
77  /* printf("xmem_read(addr 0x%02x, buf %p, size %d);\n", addr, buf, size);*/
78  memset(&xmem[offset], 0, nbytes);
79  return nbytes;
80 }
81 /*---------------------------------------------------------------------------*/
82 void
83 xmem_init(void)
84 {
85 
86 }
87 /*---------------------------------------------------------------------------*/