add aseg and loader

[netwatch.git] / aseg / load-aseg.c

diff --git a/aseg/load-aseg.c b/aseg/load-aseg.c
new file mode 100644 (file)
index 0000000..6faa1ac
--- /dev/null
+++ b/aseg/load-aseg.c
@@ -0,0 +1,109 @@
+/*
+ * devmem2.c: Simple program to read/write from/to any location in memory.
+ *
+ *  Copyright (C) 2000, Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl)
+ *
+ *
+ * This software has been developed for the LART computing board
+ * (http://www.lart.tudelft.nl/). The development has been sponsored by
+ * the Mobile MultiMedia Communications (http://www.mmc.tudelft.nl/)
+ * and Ubiquitous Communications (http://www.ubicom.tudelft.nl/)
+ * projects.
+ *
+ * The author can be reached at:
+ *
+ *  Jan-Derk Bakker
+ *  Information and Communication Theory Group
+ *  Faculty of Information Technology and Systems
+ *  Delft University of Technology
+ *  P.O. Box 5031
+ *  2600 GA Delft
+ *  The Netherlands
+ *
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <termios.h>
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+
+#define FATAL do { fprintf(stderr, "Error at line %d, file %s (%d) [%s]\n", \
+  __LINE__, __FILE__, errno, strerror(errno)); exit(1); } while(0)
+ 
+#define MAP_SIZE 4096UL
+#define MAP_MASK (MAP_SIZE - 1)
+
+int main(int argc, char **argv) {
+
+       int fd, input_fd;
+
+       void *map_base, *virt_addr; 
+       unsigned long read_result, writeval;
+       off_t target;
+       int access_type = 'w';
+
+       if(argc < 3) {
+               fprintf(stderr, "\nUsage:\t%s { address } { file }\n"
+                       "\taddress : memory address to act upon\n"
+                       "\tfile    : file to load\n\n", argv[0]);
+               exit(1);
+       }
+
+       input_fd = open(argv[2], O_RDONLY);
+       if (input_fd < 0) FATAL;
+
+       struct stat st;
+       if (fstat(input_fd, &st) < 0) FATAL;
+
+       char * buf = malloc(st.st_size);
+       if (!buf) FATAL;
+       if (read(input_fd, buf, st.st_size) != st.st_size) FATAL;
+
+       target = strtoul(argv[1], 0, 0);
+
+       fd = open("/dev/mem", O_RDWR | O_SYNC);
+       if (fd < 0) FATAL;
+
+       printf("/dev/mem opened.\n"); 
+       fflush(stdout);
+    
+       /* Map one page */
+       map_base = mmap(0, MAP_SIZE, PROT_READ | PROT_WRITE,
+                       MAP_SHARED, fd, target & ~MAP_MASK);
+
+       if (map_base == (void *) -1) FATAL;
+
+       printf("Memory mapped at address %p.\n", map_base); 
+       fflush(stdout);
+    
+       virt_addr = map_base + (target & MAP_MASK);
+       memcpy(virt_addr, buf, st.st_size);
+
+       printf("Copied %d bytes.\n", st.st_size);
+       
+       return 0;
+}