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/*
* Copyright (c) 1997-1999 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit 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 GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* create a /dev/mem
*/
#include <oskit/c/fcntl.h>
#include <oskit/c/unistd.h>
#include <oskit/c/stdio.h>
#include <oskit/c/errno.h>
#include <oskit/c/assert.h>
#include <oskit/c/fs.h>
#include <oskit/c/fd.h>
#include <oskit/fs/memfs.h>
#include <oskit/machine/base_multiboot.h>
/*
* create a /dev/mem device under dev_name, directory for dev_name must exist!
*/
oskit_error_t
make_dev_mem(char *dev_name)
{
int fd;
oskit_error_t rc;
oskit_file_t *mfile;
struct multiboot_info *m = &boot_info;
void *start = 0;
oskit_off_t len;
if (!(m->flags & MULTIBOOT_MEMORY))
return OSKIT_EINVAL;
if (m->mem_upper)
len = (0x100000 + (m->mem_upper << 10));
else
len = (m->mem_lower << 10); /* ??? */
fd = open(dev_name, O_RDWR | O_CREAT, 0x777);
if (fd == -1)
return errno;
assert(fd_array[fd].openfile);
rc = oskit_openfile_getfile(fd_array[fd].openfile, &mfile);
if (rc)
return rc;
printf(">>> %s %p-%p (%d MBytes)\n", dev_name,
start, start+len, (unsigned)(len >> 20));
rc = oskit_memfs_file_set_contents(mfile,
start /* data */,
len /* size */,
len /* allocsize, says writable length */,
0 /* can_sfree */,
1 /* inhibit_resize */);
oskit_file_release(mfile);
close(fd);
if (rc)
return rc;
return 0;
}
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