Quick hack to get AoE back in to the tree, on a par with the current

iSCSI hack.

src/usr/aoeboot.c

@@ -0,0 +1,67 @@
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+#include <gpxe/aoe.h>
+#include <gpxe/ata.h>
+#include <gpxe/netdevice.h>
+#include <gpxe/dhcp.h>
+#include <int13.h>
+#include <usr/aoeboot.h>
+
+/**
+ * Guess boot network device
+ *
+ * @ret netdev		Boot network device
+ */
+static struct net_device * guess_boot_netdev ( void ) {
+	struct net_device *boot_netdev;
+
+	/* Just use the first network device */
+	for_each_netdev ( boot_netdev ) {
+		return boot_netdev;
+	}
+
+	return NULL;
+}
+
+int aoeboot ( const char *root_path ) {
+	struct ata_device ata;
+	struct int13_drive drive;
+	int rc;
+
+	memset ( &ata, 0, sizeof ( ata ) );
+	memset ( &drive, 0, sizeof ( drive ) );
+
+	printf ( "AoE booting from %s\n", root_path );
+
+	/* FIXME: ugly, ugly hack */
+	struct net_device *netdev = guess_boot_netdev();
+
+	if ( ( rc = aoe_attach ( &ata, netdev, root_path ) ) != 0 ) {
+		printf ( "Could not attach AoE device: %s\n",
+			 strerror ( rc ) );
+		goto error_attach;
+	}
+	if ( ( rc = init_atadev ( &ata ) ) != 0 ) {
+		printf ( "Could not initialise AoE device: %s\n",
+			 strerror ( rc ) );
+		goto error_init;
+	}
+
+	drive.drive = find_global_dhcp_num_option ( DHCP_EB_BIOS_DRIVE );
+	drive.blockdev = &ata.blockdev;
+
+	register_int13_drive ( &drive );
+	printf ( "Registered as BIOS drive %#02x\n", drive.drive );
+	printf ( "Booting from BIOS drive %#02x\n", drive.drive );
+	rc = int13_boot ( drive.drive );
+	printf ( "Boot failed\n" );
+
+	printf ( "Unregistering BIOS drive %#02x\n", drive.drive );
+	unregister_int13_drive ( &drive );
+
+ error_init:
+	aoe_detach ( &ata );
+ error_attach:
+	return rc;
+}