This is the new unified bootstrap, sometimes known previously as the

'three-stage' bootstrap.
There are a number of caveats with the code in its current state:
 - The i386 bootstrap only supports booting from a floppy.
 - The kernel and kld do not yet know how to deal with the extended
   information and module summary passed in.
 - PnP-based autodetection and demand loading of modules is not implemented.
 - i386 ELF kernel loading is not ready yet.
 - The i386 bootstrap is loaded via an ugly blockmap.

On the alpha, both net- and disk-booting (SRM console machines only) is
supported.  No blockmaps are used by this code.

Obtained from:	Parts from the NetBSD/i386 standalone bootstrap.

1 files changed, 275 insertions, 0 deletions

diff --git a/sys/boot/common/dev_net.c b/sys/boot/common/dev_net.c
new file mode 100644
index 0000000..81f77c8
--- /dev/null
+++ b/sys/boot/common/dev_net.c
@@ -0,0 +1,275 @@
+/*	
+ * $Id$
+ * From: $NetBSD: dev_net.c,v 1.12 1997/12/10 20:38:37 gwr Exp $
+ */
+
+/*-
+ * Copyright (c) 1997 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Gordon W. Ross.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION 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.
+ */
+
+/*
+ * This module implements a "raw device" interface suitable for
+ * use by the stand-alone I/O library NFS code.  This interface
+ * does not support any "block" access, and exists only for the
+ * purpose of initializing the network interface, getting boot
+ * parameters, and performing the NFS mount.
+ *
+ * At open time, this does:
+ *
+ * find interface      - netif_open()
+ * RARP for IP address - rarp_getipaddress()
+ * RPC/bootparams      - callrpc(d, RPC_BOOTPARAMS, ...)
+ * RPC/mountd          - nfs_mount(sock, ip, path)
+ *
+ * the root file handle from mountd is saved in a global
+ * for use by the NFS open code (NFS/lookup).
+ */
+
+#include <machine/stdarg.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+
+#include <stand.h>
+#include <net.h>
+#include <netif.h>
+#include <nfs.h>
+#include <bootparam.h>
+
+#include "dev_net.h"
+#include "bootstrap.h"
+
+int debug = 0;
+
+static int netdev_sock = -1;
+static int netdev_opens;
+
+static int	net_init(void);
+static int	net_open(struct open_file *, void *vdev);
+static int	net_close(struct open_file *);
+static int	net_ioctl();
+static int	net_strategy();
+
+static int net_getparams(int sock);
+
+struct devsw netdev = {
+    "net", 
+    DEVT_NET, 
+    net_init,
+    net_strategy, 
+    net_open, 
+    net_close, 
+    noioctl
+};
+
+int
+net_init(void)
+{
+    return 0;
+}
+
+/*
+ * Called by devopen after it sets f->f_dev to our devsw entry.
+ * This opens the low-level device and sets f->f_devdata.
+ * This is declared with variable arguments...
+ */
+int
+net_open(struct open_file *f, void *vdev)
+{
+    char *devname;		/* Device part of file name (or NULL). */
+    int error = 0;
+
+    devname = vdev;
+
+    /* On first open, do netif open, mount, etc. */
+    if (netdev_opens == 0) {
+	/* Find network interface. */
+	if (netdev_sock < 0) {
+	    netdev_sock = netif_open(devname);
+	    if (netdev_sock < 0) {
+		printf("net_open: netif_open() failed\n");
+		return (ENXIO);
+	    }
+	    if (debug)
+		printf("net_open: netif_open() succeeded\n");
+	}
+	if (rootip.s_addr == 0) {
+	    /* Get root IP address, and path, etc. */
+	    error = net_getparams(netdev_sock);
+	    if (error) {
+				/* getparams makes its own noise */
+		netif_close(netdev_sock);
+		netdev_sock = -1;
+		return (error);
+	    }
+	}
+    }
+    netdev_opens++;
+    f->f_devdata = &netdev_sock;
+    return (error);
+}
+
+int
+net_close(f)
+    struct open_file *f;
+{
+
+#ifdef	NETIF_DEBUG
+    if (debug)
+	printf("net_close: opens=%d\n", netdev_opens);
+#endif
+
+    /* On last close, do netif close, etc. */
+    f->f_devdata = NULL;
+    /* Extra close call? */
+    if (netdev_opens <= 0)
+	return (0);
+    /*
+     * On SRM boots opening the device the first time takes ages
+     * I don't see the point of doing this every time you load a file
+     */
+    /* netdev_opens--; */
+    /* Not last close? */
+    if (netdev_opens > 0)
+	return(0);
+    rootip.s_addr = 0;
+    if (netdev_sock >= 0) {
+	if (debug)
+	    printf("net_close: calling netif_close()\n");
+	netif_close(netdev_sock);
+	netdev_sock = -1;
+    }
+    return (0);
+}
+
+int
+net_ioctl()
+{
+    return EIO;
+}
+
+int
+net_strategy()
+{
+    return EIO;
+}
+
+#define SUPPORT_BOOTP
+
+/*
+ * Get info for NFS boot: our IP address, our hostname,
+ * server IP address, and our root path on the server.
+ * There are two ways to do this:  The old, Sun way,
+ * and the more modern, BOOTP way. (RFC951, RFC1048)
+ *
+ * The default is to use the Sun bootparams RPC
+ * (because that is what the kernel will do).
+ * MD code can make try_bootp initialied data,
+ * which will override this common definition.
+ */
+#ifdef	SUPPORT_BOOTP
+int try_bootp = 1;
+int bootp(int sock);
+#endif
+
+static int
+net_getparams(sock)
+    int sock;
+{
+    char buf[MAXHOSTNAMELEN];
+    n_long smask;
+
+#ifdef	SUPPORT_BOOTP
+    /*
+     * Try to get boot info using BOOTP.  If we succeed, then
+     * the server IP address, gateway, and root path will all
+     * be initialized.  If any remain uninitialized, we will
+     * use RARP and RPC/bootparam (the Sun way) to get them.
+     */
+    if (try_bootp)
+	bootp(sock);
+    if (myip.s_addr != 0)
+	return (0);
+    if (debug)
+	printf("net_open: BOOTP failed, trying RARP/RPC...\n");
+#endif
+
+    /*
+     * Use RARP to get our IP address.  This also sets our
+     * netmask to the "natural" default for our address.
+     */
+    if (rarp_getipaddress(sock)) {
+	printf("net_open: RARP failed\n");
+	return (EIO);
+    }
+    printf("net_open: client addr: %s\n", inet_ntoa(myip));
+
+    /* Get our hostname, server IP address, gateway. */
+    if (bp_whoami(sock)) {
+	printf("net_open: bootparam/whoami RPC failed\n");
+	return (EIO);
+    }
+    printf("net_open: client name: %s\n", hostname);
+
+    /*
+     * Ignore the gateway from whoami (unreliable).
+     * Use the "gateway" parameter instead.
+     */
+    smask = 0;
+    gateip.s_addr = 0;
+    if (bp_getfile(sock, "gateway", &gateip, buf) == 0) {
+	/* Got it!  Parse the netmask. */
+	smask = ip_convertaddr(buf);
+    }
+    if (smask) {
+	netmask = smask;
+	printf("net_open: subnet mask: %s\n", intoa(netmask));
+    }
+    if (gateip.s_addr)
+	printf("net_open: net gateway: %s\n", inet_ntoa(gateip));
+
+    /* Get the root server and pathname. */
+    if (bp_getfile(sock, "root", &rootip, rootpath)) {
+	printf("net_open: bootparam/getfile RPC failed\n");
+	return (EIO);
+    }
+
+    printf("net_open: server addr: %s\n", inet_ntoa(rootip));
+    printf("net_open: server path: %s\n", rootpath);
+
+    return (0);
+}