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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.
*/
#include <oskit/startup.h>
#include <oskit/dev/dev.h>
#include <oskit/io/blkio.h>
#include <oskit/io/absio.h>
#include <oskit/svm.h>
#ifdef PTHREADS
#include <oskit/com/wrapper.h>
#include <oskit/threads/pthread.h>
#define start_svm start_svm_pthreads
#define start_svm_on_blkio start_svm_on_blkio_pthreads
#else
#define osenv_process_lock()
#define osenv_process_unlock()
#endif
/*
* Start the SVM system on a specific oskit_blkio instance. In the pthreads
* case, the bio should NOT be wrapped; it will be taken care of here.
*/
oskit_error_t
start_svm_on_blkio(oskit_blkio_t *bio)
{
#ifdef PTHREADS
{
oskit_error_t err;
oskit_blkio_t *wrappedbio;
/*
* Wrap the partition blkio.
*/
err = oskit_wrap_blkio(bio,
(void (*)(void *))osenv_process_lock,
(void (*)(void *))osenv_process_unlock,
0, &wrappedbio);
if (err)
panic("oskit_wrap_blkio() failed: errno 0x%x\n", err);
/*
* Don't need the partition anymore, the wrapper has a ref.
*/
oskit_blkio_release(bio);
bio = wrappedbio;
}
#endif
/*
* Allow for the possibility that the SVM system was already
* initialized without a pager bio, and that this might be a
* subsequent call to add paging to the mix.
*/
svm_pager_init((oskit_absio_t *) bio);
/*
* Don't need the partition anymore, SVM has a ref.
*/
oskit_blkio_release(bio);
return 0;
}
/*
* Start the SVM system on a disk/partition specification.
*
* Device initialization should already have been done.
*/
oskit_error_t
start_svm(const char *disk, const char *partition)
{
oskit_error_t err;
oskit_blkio_t *bio;
/*
* If paging is not requested ...
*/
if (!disk) {
svm_init((oskit_absio_t *) 0);
return 0;
}
/* Otherwise open the disk partition. */
osenv_process_lock();
err = start_disk(disk, partition, 0, &bio);
osenv_process_unlock();
if (err)
return err;
return start_svm_on_blkio(bio);
}
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