librump/rumpkern/emul.c

/*	$NetBSD: emul.c,v 1.2 2007/08/08 07:50:33 pooka Exp $	*/

/*
 * Copyright (c) 2007 Antti Kantee.  All Rights Reserved.
 *
 * Development of this software was supported by Google Summer of Code.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/null.h>
#include <sys/vnode.h>
#include <sys/stat.h>
#include <sys/syslog.h>
#include <sys/namei.h>
#include <sys/kauth.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/filedesc.h>

#include <machine/cpu.h>
#include <machine/stdarg.h>

#include "rump.h"
#include "rumpuser.h"

#define MAXUSERS 32
int desiredvnodes = NVNODE;
time_t time_second = 1;

kmutex_t proclist_mutex;
struct lwp lwp0;
struct vnode *rootvp;
struct device *root_device;

MALLOC_DEFINE(M_MOUNT, "mount", "vfs mount struct");
MALLOC_DEFINE(M_UFSMNT, "UFS mount", "UFS mount structure");
MALLOC_DEFINE(M_TEMP, "temp", "misc. temporary data buffers");
MALLOC_DEFINE(M_DEVBUF, "devbuf", "device driver memory");
MALLOC_DEFINE(M_VNODE, "vnodes", "Dynamically allocated vnodes");

struct lwp *curlwp;

char hostname[MAXHOSTNAMELEN];
size_t hostnamelen;

void
panic(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	vprintf(fmt, ap);
	va_end(ap);
	printf("\n");
	abort();
}

void
log(int level, const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	vprintf(fmt, ap);
	va_end(ap);
}

void
uprintf(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	vprintf(fmt, ap);
	va_end(ap);
}

int
copyin(const void *uaddr, void *kaddr, size_t len)
{

	memcpy(kaddr, uaddr, len);
	return 0;
}

int
copyout(const void *kaddr, void *uaddr, size_t len)
{

	memcpy(uaddr, kaddr, len);
	return 0;
}

int
copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done)
{

	return copyinstr(kfaddr, kdaddr, len, done);
}

int
copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done)
{

	strlcpy(kaddr, uaddr, len);
	*done = strlen(kaddr);
	return 0;
}

int
uiomove(void *buf, size_t n, struct uio *uio)
{
	struct iovec *iov;
	uint8_t *b = buf;
	size_t cnt;

	if (uio->uio_vmspace != UIO_VMSPACE_SYS)
		panic("%s: vmspace != UIO_VMSPACE_SYS", __func__);

	if (buf == RUMP_UBC_MAGIC_WINDOW)
		return rump_ubc_magic_uiomove(n, uio);

	while (n && uio->uio_resid) {
		iov = uio->uio_iov;
		cnt = iov->iov_len;
		if (cnt == 0) {
			uio->uio_iov++;
			uio->uio_iovcnt--;
			continue;
		}
		if (cnt > n)
			cnt = n;

		if (uio->uio_rw == UIO_READ)
			memcpy(iov->iov_base, b, cnt);
		else
			memcpy(b, iov->iov_base, cnt);

		iov->iov_base = (uint8_t *)iov->iov_base + cnt;
		iov->iov_len -= cnt;
		b += cnt;
		uio->uio_resid -= cnt;
		uio->uio_offset += cnt;
		n -= cnt;
	}

	return 0;
}

void
uio_setup_sysspace(struct uio *uio)
{

	uio->uio_vmspace = UIO_VMSPACE_SYS;
}

const struct bdevsw *
bdevsw_lookup(dev_t dev)
{

	return (const struct bdevsw *)1;
}

devclass_t
device_class(device_t dev)
{

	if (dev != root_device)
		panic("%s: dev != root_device not supported", __func__);

	return DV_DISK;
}

void
getmicrouptime(struct timeval *tvp)
{

	rumpuser_gettimeofday(tvp);
}

int
ltsleep(wchan_t ident, pri_t prio, const char *wmesg, int timo,
	volatile struct simplelock *slock)
{

	panic("%s: not implemented", __func__);
}

/*
 * XXX: ok, this is stupid
 */
#undef bswap16
uint16_t
bswap16(uint16_t val)
{

	return rumpuser_bswap16(val);
}

#undef bswap32
uint32_t
bswap32(uint32_t value)
{

	return rumpuser_bswap32(value);
}

#undef bswap64
uint64_t
bswap64(uint64_t value)
{

	return rumpuser_bswap64(value);
}

void
malloc_type_attach(struct malloc_type *type)
{

	return;
}

void
malloc_type_detach(struct malloc_type *type)
{

	return;
}

void
nanotime(struct timespec *ts)
{
	struct timeval tv;

	rumpuser_gettimeofday(&tv);
	TIMEVAL_TO_TIMESPEC(&tv, ts);
}

/* hooray for mick, so what if I do */
void
getnanotime(struct timespec *ts)
{

	nanotime(ts);
}

void
microtime(struct timeval *tv)
{

	rumpuser_gettimeofday(tv);
}

void
bdev_strategy(struct buf *bp)
{

	panic("%s: not supported", __func__);
}