Commit 53396d9d authored by aTc's avatar aTc

Imported Upstream version 0.0

parents
devmem2 (0.0-0ubuntu1) maverick; urgency=low
* Initial release (LP: #607752)
-- Ricardo Salveti de Araujo <ricardo.salveti@canonical.com> Mon, 13 Sep 2010 02:18:47 -0300
Source: devmem2
Section: misc
Priority: optional
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Build-Depends: debhelper (>= 7)
Standards-Version: 3.9.1
Homepage: http://www.lartmaker.nl/lartware/port/
Vcs-Bzr: lp:~rsalveti/+junk/devmem2
Vcs-Browser: http://bazaar.launchpad.net/~rsalveti/+junk/devmem2/files
Package: devmem2
Architecture: any
Depends: ${shlibs:Depends}, ${misc:Depends}
Description: simple program to read/write from/to any location in memory
Simple program to read/write from/to any location in memory. Useful when
debugging embedded boards, like beagleboard.
Format-Specification: http://svn.debian.org/wsvn/dep/web/deps/dep5.mdwn?op=file&rev=135
Name: devmem2
Maintainer: Jan-Derk Bakker <jdb@lartmaker.nl>
Source: http://www.lartmaker.nl/lartware/port/devmem2.c
Files: debian/*
Copyright: 2010, Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
License: GPL-2+
Files: devmem2.c
Copyright: 2000, Jan-Derk Bakker <jdb@lartmaker.nl>
License: GPL-2+
License: GPL-2+
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 package; if not, write to the Free
Software Foundation, Inc., 51 Franklin St, Fifth Floor,
Boston, MA 02110-1301 USA
.
On Debian systems, the full text of the GNU General Public
License version 2 can be found in the file
`/usr/share/common-licenses/GPL-2'.
.\" Hey, EMACS: -*- nroff -*-
.\" First parameter, NAME, should be all caps
.\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
.\" other parameters are allowed: see man(7), man(1)
.TH DEVMEM2 1 "September 28, 2010"
.\" Please adjust this date whenever revising the manpage.
.\"
.\" Some roff macros, for reference:
.\" .nh disable hyphenation
.\" .hy enable hyphenation
.\" .ad l left justify
.\" .ad b justify to both left and right margins
.\" .nf disable filling
.\" .fi enable filling
.\" .br insert line break
.\" .sp <n> insert n+1 empty lines
.\" for manpage-specific macros, see man(7)
.SH NAME
devmem2 \- simple program to read/write from/to any location in memory
.SH SYNOPSIS
.B devmem2
.RI "address [type [data]]"
.SH DESCRIPTION
.PP
.\" TeX users may be more comfortable with the \fB<whatever>\fP and
.\" \fI<whatever>\fP escape sequences to invode bold face and italics,
.\" respectively.
\fBdevmem2\fP is a simple program to read/write from/to any location
in memory. Useful when debugging embedded boards, e.g. beagleboard.
.SH OPTIONS
.TP
.B address
Memory address to act upon.
.TP
.B type
Access operation type: [b]yte, [h]alfword, [w]ord.
.TP
.B data
Data to be written.
.SH AUTHOR
devmem2 was written by Jan-Derk Bakker <jdb@lartmaker.nl>.
.PP
This manual page was written by Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>,
for the Debian project (and may be used by others).
devmem2 usr/bin
#! /usr/bin/make -f
%:
dh $@
override_dh_auto_clean:
rm -f devmem2
override_dh_auto_build:
$(CC) $(CFLAGS) devmem2.c -o devmem2
# Upstream does not release versioned tarballs. The latest version can
# always be found here:
# http://www.lartmaker.nl/lartware/port/devmem2.c
/*
* devmem2.c: Simple program to read/write from/to any location in memory.
*
* Copyright (C) 2000, Jan-Derk Bakker (jdb@lartmaker.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.
*
*
* 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>
#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;
void *map_base, *virt_addr;
unsigned long read_result, writeval;
off_t target;
int access_type = 'w';
if(argc < 2) {
fprintf(stderr, "\nUsage:\t%s { address } [ type [ data ] ]\n"
"\taddress : memory address to act upon\n"
"\ttype : access operation type : [b]yte, [h]alfword, [w]ord\n"
"\tdata : data to be written\n\n",
argv[0]);
exit(1);
}
target = strtoul(argv[1], 0, 0);
if(argc > 2)
access_type = tolower(argv[2][0]);
if((fd = open("/dev/mem", O_RDWR | O_SYNC)) == -1) 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);
switch(access_type) {
case 'b':
read_result = *((unsigned char *) virt_addr);
break;
case 'h':
read_result = *((unsigned short *) virt_addr);
break;
case 'w':
read_result = *((unsigned long *) virt_addr);
break;
default:
fprintf(stderr, "Illegal data type '%c'.\n", access_type);
exit(2);
}
printf("Value at address 0x%X (%p): 0x%X\n", target, virt_addr, read_result);
fflush(stdout);
if(argc > 3) {
writeval = strtoul(argv[3], 0, 0);
switch(access_type) {
case 'b':
*((unsigned char *) virt_addr) = writeval;
read_result = *((unsigned char *) virt_addr);
break;
case 'h':
*((unsigned short *) virt_addr) = writeval;
read_result = *((unsigned short *) virt_addr);
break;
case 'w':
*((unsigned long *) virt_addr) = writeval;
read_result = *((unsigned long *) virt_addr);
break;
}
printf("Written 0x%X; readback 0x%X\n", writeval, read_result);
fflush(stdout);
}
if(munmap(map_base, MAP_SIZE) == -1) FATAL;
close(fd);
return 0;
}
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