Home | History | Annotate | Line # | Download | only in conf
GENERIC revision 1.67
      1   1.1  takemura #
      2  1.46       uch # Distribution kernel (NEC VR based model) kernel config file
      3   1.1  takemura 
      4   1.1  takemura #
      5  1.67      sato # 	$NetBSD: GENERIC,v 1.67 2000/09/27 09:32:23 sato Exp $
      6   1.1  takemura #
      7   1.1  takemura include		"arch/hpcmips/conf/std.hpcmips"
      8  1.24   hubertf 
      9  1.67      sato #ident 		"GENERIC-$Revision: 1.67 $"
     10   1.1  takemura 
     11   1.1  takemura maxusers	8
     12   1.1  takemura 
     13   1.1  takemura options 	MIPS3			# R4000/R4400/R4600 CPUs
     14   1.1  takemura 
     15   1.1  takemura # Support for specific models of H/PC MIPS
     16   1.1  takemura options 	VR41X1			# NEC VR41x1 series
     17   1.9     enami options 	MIPS3_4100		# VR4100 core
     18  1.22      shin options 	NOFPU			# No FPU
     19  1.22      shin options 	SOFTFLOAT		# emulate FPU insn
     20   1.9     enami options 	MIPS3_L2CACHE_ABSENT
     21   1.1  takemura 
     22   1.1  takemura # Standard system options
     23   1.1  takemura options 	DDB			# in-kernel debugger
     24   1.1  takemura #options 	DDB_ONPANIC=0		# don't enter debugger on panic
     25  1.58     jeffs #options	KGDB			# remote debugger
     26   1.1  takemura #options 	DIAGNOSTIC		# extra kernel debugging checks
     27   1.1  takemura #options 	DEBUG			# extra kernel debugging support
     28   1.1  takemura options 	KTRACE			# system call tracing support
     29   1.1  takemura 
     30  1.54      shin #options 	SCSIVERBOSE		# human readable SCSI error messages
     31  1.27      sato #options 	PCMCIAVERBOSE		# verbose PCMCIA configuration messages
     32   1.1  takemura 
     33  1.11      sato #options 	RTC_OFFSET=0	# hardware clock is this many mins. west of GMT
     34   1.9     enami #options 	RTC_OFFSET=-540		# JST-9
     35   1.9     enami #options 	RTC_OFFSET=480		# PST8
     36  1.25      sato 					# In NO RTC_OFFSET , inherit RTC_OFFSET
     37  1.25      sato 					# from Windows CE.
     38   1.1  takemura options 	NTP			# network time protocol
     39   1.1  takemura #options 	UCONSOLE		# users can redirect console (unsafe)
     40   1.1  takemura 
     41   1.9     enami #options 	WINCE_DEFAULT_SETTING	# Debugging use
     42   1.9     enami #options 	DUMP_GIU_LEVEL2_INTR	# Debugging use
     43   1.9     enami #options 	DEBUG_FIND_PCIC		# Debugging use XXX harmful don't define until read source.
     44   1.9     enami 
     45   1.9     enami #options 	SYSCALL_DEBUG		# for debug
     46   1.9     enami #options 	HPCMIPS_L1CACHE_DISABLE	# disable L1 cache for debug
     47   1.9     enami #options 	HPCMIPS_FLUSHCACHE_XXX	# for debug
     48   1.1  takemura 
     49   1.1  takemura # Filesystem options
     50   1.1  takemura file-system 	FFS             # fast filesystem with user and group quotas
     51   1.1  takemura file-system 	MFS		# memory-based filesystem
     52   1.1  takemura file-system 	NFS		# Sun NFS-compatible filesystem (client)
     53   1.1  takemura #file-system	LFS		# Log-based filesystem (still experimental)
     54  1.54      shin file-system 	CD9660		# ISO 9660 + Rock Ridge file system
     55  1.20      shin file-system 	MSDOSFS		# MS-DOS file system
     56   1.1  takemura #file-system 	FDESC		# /dev/fd
     57   1.1  takemura file-system 	KERNFS		# /kern (kernel informational filesystem)
     58   1.1  takemura #file-system 	NULLFS		# loopback file system
     59  1.23  wrstuden #file-system 	OVERLAY		# overlay file system
     60   1.1  takemura #file-system 	PORTAL		# portal filesystem (still experimental)
     61   1.1  takemura file-system 	PROCFS		# /proc
     62   1.1  takemura #file-system 	UMAPFS		# NULLFS + uid and gid remapping
     63   1.1  takemura file-system 	UNION
     64   1.1  takemura 
     65   1.1  takemura #options 	NFSSERVER	# Sun NFS-compatible filesystem (server)
     66  1.55      fvdl options 	SOFTDEP         # FFS soft updates support.
     67  1.54      shin #options 	QUOTA		# UFS quotas
     68  1.13       jun 
     69   1.1  takemura # Networking options
     70  1.13       jun #options 	GATEWAY		# IP packet forwarding
     71  1.13       jun options 	INET		# IP + ICMP + TCP + UDP
     72  1.13       jun options 	INET6		# IPV6
     73  1.13       jun #options 	IPSEC		# IP security
     74  1.13       jun #options 	IPSEC_ESP	# IP security (encryption part; define w/ IPSEC)
     75  1.13       jun #options 	IPSEC_DEBUG	# debug for IP security
     76   1.1  takemura #options 	MROUTING	# Multicast routing support
     77   1.1  takemura #options 	ISO		# OSI networking
     78   1.1  takemura #options 	TPIP		# TPIP
     79   1.1  takemura #options 	EON		# OSI tunneling over IP
     80   1.1  takemura #options 	CCITT,LLC,HDLC	# X.25
     81   1.1  takemura 
     82   1.1  takemura # NetBSD backwards compatibility
     83  1.45       uch options 	COMPAT_43
     84   1.1  takemura 
     85   1.9     enami options 	NFS_BOOT_DHCP
     86   1.1  takemura 
     87   1.1  takemura config		netbsd		root on ? type ?
     88   1.1  takemura 
     89   1.1  takemura # WS console uses SUN or VT100 terminal emulation
     90   1.1  takemura options 	WSEMUL_VT100
     91   1.9     enami options 	WSDISPLAY_DEFAULTSCREENS=4
     92   1.9     enami #options 	FONT_VT220L8x8
     93   1.9     enami options 	FONT_VT220L8x10
     94  1.48  takemura # compatibility to other console drivers
     95  1.48  takemura options 	WSDISPLAY_COMPAT_PCVT		# emulate some ioctls
     96  1.48  takemura options 	WSDISPLAY_COMPAT_SYSCONS	# emulate some ioctls
     97  1.48  takemura options 	WSDISPLAY_COMPAT_USL		# VT handling
     98  1.48  takemura options 	WSDISPLAY_COMPAT_RAWKBD		# can get raw scancodes
     99  1.57  takemura 
    100  1.57  takemura # temporally power management
    101  1.61  takemura hpcapm0	at mainbus0			# power management
    102  1.61  takemura apmdev0	at hpcapm0			# APM
    103   1.1  takemura 
    104   1.1  takemura vrip*	at mainbus0
    105   1.1  takemura vrcmu*	at vrip? addr 0x0b000060 size 0x20
    106   1.1  takemura vrbcu*	at vrip? addr 0x0b000000 size 0x20
    107   1.1  takemura vrrtc*	at vrip? addr 0x0b0000c0 size 0x20 intr 2
    108   1.1  takemura 
    109   1.1  takemura vrkiu*  at vrip? addr 0x0b000180 size 0x20 intr 7
    110  1.65  takemura hpckbd*	at vrkiu?
    111   1.9     enami options 	__NO_SOFT_SERIAL_INTERRUPT
    112  1.28  takemura com*	at vrip? addr 0x0c000000 size 0x20 intr 9 pwctl PWCTL_COM0
    113   1.1  takemura vrgiu*	at vrip? addr 0x0b000100 size 0x20 intr 8
    114   1.1  takemura vrpmu*	at vrip? addr 0x0b0000a0 size 0x20 intr 1 # power switch
    115  1.16  takemura vrdsu*	at vrip? addr 0x0b0000e0 size 0x08
    116  1.19  takemura vrpiu*	at vrip? addr 0x0b000120 size 0x1a0 intr 5
    117  1.59  takemura 
    118  1.61  takemura mqvideo0 at vrip? addr 0x0a000000 size 0x800000	# MQ200 video controller
    119  1.61  takemura hpcfb*		at	mqvideo?
    120  1.19  takemura 
    121  1.19  takemura # Workstation Console attachments
    122  1.35  takemura bivideo0	at	mainbus0
    123  1.35  takemura hpcfb*		at	bivideo0
    124  1.35  takemura wsdisplay*	at	hpcfb?
    125  1.65  takemura wskbd*		at	hpckbd? mux 1
    126  1.19  takemura wsmouse*	at	vrpiu? mux 0
    127  1.36  takemura btnmgr0		at	mainbus0
    128  1.36  takemura wskbd*		at	btnmgr0 mux 1
    129   1.1  takemura 
    130   1.1  takemura #
    131  1.33  takemura # hpcmips isa? bus irq locator means:
    132  1.33  takemura #
    133  1.33  takemura # 0x0000000f ISA IRQ#
    134  1.33  takemura # 0x00ff0000 GPIO port#
    135  1.33  takemura # 0x01000000 interrupt signal hold/through	(1:hold/0:though)
    136  1.33  takemura # 0x02000000 interrupt detection level		(1:low /0:high	)
    137  1.33  takemura # 0x04000000 interrupt detection trigger	(1:edge/0:level	)
    138  1.33  takemura 
    139  1.33  takemura #
    140  1.27      sato # MC-R300, MC-R500
    141   1.1  takemura # Button to GPIO port # mapping
    142   1.1  takemura #  + REC button       : 4
    143   1.1  takemura #  + Open/Close button: 6
    144   1.1  takemura # (PCIC-ISA : 9)
    145   1.1  takemura # (COM power:14)
    146  1.27      sato #
    147  1.27      sato # MC-R510
    148  1.27      sato # Button to GPIO port # mapping
    149  1.27      sato #  + Open/Close button: 3
    150  1.27      sato # (PCIC-ISA : 9)
    151  1.27      sato # (COM power:14)
    152  1.27      sato #
    153  1.27      sato # MC-R530
    154  1.27      sato # Button to GPIO port # mapping
    155  1.27      sato #  + Open/Close button: 3
    156  1.27      sato #  + Application button: 2
    157  1.27      sato # (PCIC-ISA : 9)
    158  1.27      sato # (COM power:14)
    159  1.27      sato #
    160  1.27      sato # MC-R700
    161  1.27      sato # Button to GPIO port # mapping
    162  1.27      sato #  + Open/Close button: 3
    163  1.27      sato # (PCIC-ISA : 9)
    164  1.27      sato # (COM power:46)
    165  1.27      sato #
    166  1.27      sato # MC-CS
    167  1.27      sato # Button to GPIO port # mapping
    168  1.27      sato # (PCIC-ISA : 9)
    169  1.27      sato # (COM power:14)
    170  1.27      sato #
    171  1.27      sato # IBM WorkPad z50
    172  1.27      sato # Button to GPIO port # mapping
    173  1.27      sato #  + REC button       : 1
    174  1.27      sato #  + Application button?      : 2
    175  1.27      sato # (PCIC-ISA : 9)
    176  1.27      sato #
    177  1.18  takemura button0 at vrgiu? platform NEC_MCR_3XX id BTN_REC port 4
    178  1.64      sato button0 at vrgiu? platform NEC_MCR_500 id BTN_REC port 4
    179  1.64      sato button0 at vrgiu? platform IBM_WORKPAD id BTN_REC port 1 active 0 
    180  1.64      sato button1 at vrgiu? platform NEC_MCR_510 id BTN_COVER port 3
    181  1.64      sato button1 at vrgiu? platform NEC_MCR_520 id BTN_COVER port 3
    182  1.64      sato button1 at vrgiu? platform NEC_MCR_530 id BTN_COVER port 3
    183  1.67      sato button1 at vrgiu? platform NEC_MCR_SIGMARION id BTN_COVER port 3
    184  1.64      sato button1 at vrgiu? platform NEC_MCR_7XX id BTN_COVER port 3
    185  1.18  takemura button1 at vrgiu? platform NEC_MCR_3XX id BTN_COVER port 6
    186  1.18  takemura button1 at vrgiu? platform NEC_MCR_500 id BTN_COVER port 6
    187  1.64      sato button2 at vrgiu? platform NEC_MCR_530 id BTN_APP0  port 2
    188  1.64      sato button2 at vrgiu? platform IBM_WORKPAD id BTN_APP0  port 2 active 0
    189  1.64      sato button3 at vrgiu? platform NEC_MCCS id BTN_LIGHT port 8
    190  1.18  takemura pwctl0 at vrgiu? platform NEC_MCR_3XX id PWCTL_COM0 port 14
    191  1.64      sato pwctl0 at vrgiu? platform NEC_MCR_5XX id PWCTL_COM0 port 14
    192  1.64      sato pwctl0 at vrgiu? platform NEC_MCR_7XX id PWCTL_COM0 port 46
    193  1.64      sato pwctl0 at vrgiu? platform NEC_MCCS id PWCTL_COM0 port 14
    194  1.38      sato pwctl1 at vrgiu? platform NEC_MCR_300 id PWCTL_LCDLIGHT port 45
    195  1.64      sato pwctl1 at vrgiu? platform NEC_MCR_FORDOCOMO id PWCTL_LCDLIGHT port 45
    196  1.64      sato pwctl1 at vrgiu? platform NEC_MCR_500 id PWCTL_LCDLIGHT port 45
    197  1.64      sato pwctl1 at vrgiu? platform NEC_MCCS id PWCTL_LCDLIGHT port 45
    198  1.42      sato pwctl2 at vrgiu? platform NEC_MCR_300 id PWCTL_LCD port 10
    199  1.63      sato pwctl2 at vrgiu? platform NEC_MCR_FORDOCOMO id PWCTL_LCD port 10
    200  1.63      sato pwctl2 at vrgiu? platform NEC_MCR_500 id PWCTL_LCD port 10
    201  1.42      sato pwctl2 at vrgiu? platform NEC_MCCS id PWCTL_LCD port 10
    202  1.64      sato pwctl3 at vrgiu? platform NEC_MCR_3XX id PWCTL_SPEAKER port 12
    203  1.64      sato pwctl3 at vrgiu? platform NEC_MCR_500 id PWCTL_SPEAKER port 12
    204  1.64      sato pwctl3 at vrgiu? platform NEC_MCR_510 id PWCTL_SPEAKER port 44
    205  1.64      sato pwctl3 at vrgiu? platform NEC_MCR_520 id PWCTL_SPEAKER port 44
    206  1.64      sato pwctl3 at vrgiu? platform NEC_MCR_530 id PWCTL_SPEAKER port 44
    207  1.64      sato pwctl3 at vrgiu? platform IBM_WORKPAD id PWCTL_SPEAKER port 49
    208   1.1  takemura vrisab0 at vrgiu? platform NEC_MCR
    209   1.1  takemura vrisab0 at vrgiu? platform NEC_MCCS
    210  1.14      shin vrisab0 at vrgiu? platform IBM_WORKPAD isaportoffset 0x1000000
    211   1.1  takemura isa0	at vrisab0
    212   1.1  takemura pcic0	at isa0 port 0x3e0 iomem 0x70000 iosiz 0x4000 irq 0x00090003
    213   1.1  takemura #
    214   1.1  takemura # Freestyle
    215   1.1  takemura # Button to GPIO port # mapping
    216   1.1  takemura #    +---------+
    217   1.1  takemura # 1 +|         |
    218   1.1  takemura #    |         |+ 7
    219   1.1  takemura #    |         |
    220   1.1  takemura #20 +|   LCD   |+ 4
    221   1.1  takemura #    |         | + 6
    222   1.5     enami # 8 +|         |+ 5
    223   1.1  takemura #    |         |
    224   1.7       uch #    |         |+----Power On/Off (connected to PMU)
    225   1.1  takemura #    +---------+
    226   1.1  takemura #          +9
    227   1.1  takemura #        +12 +10
    228   1.1  takemura #          +11
    229   1.1  takemura # (PCIC-ISA : 23)
    230  1.18  takemura button0 at vrgiu? platform EVEREX_FREESTYLE id BTN_APP0 port 9
    231  1.18  takemura button1 at vrgiu? platform EVEREX_FREESTYLE id BTN_APP1 port 10
    232  1.18  takemura button2 at vrgiu? platform EVEREX_FREESTYLE id BTN_APP2 port 11
    233  1.18  takemura button3 at vrgiu? platform EVEREX_FREESTYLE id BTN_APP3 port 12
    234  1.18  takemura button4 at vrgiu? platform EVEREX_FREESTYLE id BTN_CANCEL port 7
    235  1.18  takemura button5 at vrgiu? platform EVEREX_FREESTYLE id BTN_UP port 4
    236  1.18  takemura button6 at vrgiu? platform EVEREX_FREESTYLE id BTN_OK port 6
    237  1.18  takemura button7 at vrgiu? platform EVEREX_FREESTYLE id BTN_DOWN port 5
    238  1.18  takemura button8 at vrgiu? platform EVEREX_FREESTYLE id BTN_REC port 1
    239  1.18  takemura button9 at vrgiu? platform EVEREX_FREESTYLE id BTN_LIGHT port 20
    240  1.18  takemura button10 at vrgiu? platform EVEREX_FREESTYLE id BTN_CONTRAST port 8
    241   1.1  takemura vrisab1 at vrgiu? platform EVEREX_FREESTYLE isaportoffset 0x1000000
    242   1.1  takemura isa1	at vrisab1
    243   1.1  takemura pcic0	at isa1 port 0x3e0 iomem 0x70000 iosiz 0x4000 irq 0x00170003
    244   1.1  takemura 
    245   1.9     enami options 	PCIC_ISA_INTR_ALLOC_MASK=0x0008 # IRQ 3 only (MCR/Freestyle)
    246  1.31       jun 
    247   1.1  takemura #
    248  1.17      shin # Fujitsu INTERTOP CX300
    249  1.17      shin #
    250  1.18  takemura pwctl0 at vrgiu? platform FUJITSU_INTERTOP id PWCTL_COM0 port 15
    251  1.17      shin vrisab2 at vrgiu? platform FUJITSU_INTERTOP isaportoffset 0x1000000
    252  1.17      shin isa2    at vrisab2
    253  1.17      shin pcic0   at isa2 port 0x3e0 iomem 0x70000 iosiz 0x4000 irq 0x00060003
    254  1.33  takemura 
    255  1.17      shin #
    256  1.21      shin # Vadem Clio and Sharp Tripad
    257  1.21      shin #
    258  1.21      shin vrisab3 at vrgiu? platform SHARP_TRIPAD isaportoffset 0x1000000
    259  1.52  takemura vrisab3 at vrgiu? platform VADEM_CLIO_C isaportoffset 0x1000000
    260  1.21      shin isa3    at vrisab3
    261  1.21      shin pcic0   at isa3 port 0x3e0 iomem 0x70000 iosiz 0x4000 irq 0x000d0003
    262  1.33  takemura 
    263  1.33  takemura #
    264  1.33  takemura # CASIO CASSIOPEIA E55 and for DoCoMo
    265  1.33  takemura #
    266  1.33  takemura button0 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id BTN_OK active 0 port 6
    267  1.33  takemura button1 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id BTN_CANCEL active 0 port 7
    268  1.33  takemura button2 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id BTN_APP0 active 0 port 8
    269  1.33  takemura button3 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id BTN_APP1 active 0 port 9
    270  1.33  takemura button4 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id BTN_APP2 active 0 port 10
    271  1.33  takemura button5 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id BTN_APP3 active 0 port 11
    272  1.33  takemura button6 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id BTN_DOWN active 0 port 12
    273  1.33  takemura button7 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id BTN_UP active 0 port 13
    274  1.50      sato pwctl0 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id PWCTL_COM0 port 38
    275  1.50      sato pwctl1 at vrgiu? platform CASIO_CASSIOPEIAE_E55 id PWCTL_LCDLIGHT port 26
    276  1.33  takemura vrisab4 at vrgiu? platform CASIO_CASSIOPEIAE_E55 isaportoffset 0xc000
    277  1.33  takemura isa4    at vrisab4
    278  1.33  takemura wdc0    at isa4 port 0x170 irq 0x02000003 flags 0x0010  # AT_POLL
    279  1.33  takemura 
    280  1.21      shin #
    281   1.1  takemura # Unknown machines
    282   1.1  takemura #
    283  1.21      shin vrisab4 at vrgiu?
    284  1.30   mycroft isa4	at vrisab4
    285   1.1  takemura 
    286   1.1  takemura # PCMCIA bus support
    287  1.34      shin pcmcia*	at pcic? controller 0 socket ?
    288   1.1  takemura 
    289   1.1  takemura # PCMCIA IDE disk
    290   1.1  takemura wdc*	at pcmcia? function ?
    291   1.1  takemura wd*	at wdc? channel ? drive ? flags 0x0000
    292   1.1  takemura 
    293   1.1  takemura # PCMCIA network interfaces
    294   1.1  takemura ep*	at pcmcia? function ?		# 3Com 3c589 and 3c562 Ethernet
    295   1.1  takemura mbe*	at pcmcia? function ?		# MB8696x based Ethernet
    296   1.1  takemura ne*	at pcmcia? function ?		# NE2000-compatible Ethernet
    297   1.1  takemura sm*	at pcmcia? function ?		# Megahertz Ethernet
    298  1.32  takemura wi*	at pcmcia? function ?		# Lucent WaveLan IEEE (802.11)
    299  1.32  takemura awi*	at pcmcia? function ?		# WLI-PCM
    300   1.1  takemura 
    301  1.49  takemura # PCMCIA Serial interfaces
    302   1.1  takemura com*	at pcmcia? function ?		# Modems and serial cards
    303   1.1  takemura 
    304  1.49  takemura # PCMCIA SCSI interfaces
    305   1.1  takemura aic*	at pcmcia? function ?
    306  1.49  takemura esp*	at pcmcia? function ?		# NCR53c406 SCSI
    307  1.49  takemura 
    308  1.49  takemura # ATAPI bus support
    309  1.49  takemura atapibus* at wdc? channel ?
    310  1.49  takemura cd*	at atapibus? drive ? flags 0x0000 # ATAPI CD-ROM drives
    311  1.49  takemura sd*	at atapibus? drive ? flags 0x0000 # ATAPI disk drives
    312  1.49  takemura 
    313  1.49  takemura # SCSI bus support
    314   1.1  takemura scsibus* at aic?
    315  1.49  takemura scsibus* at esp?
    316   1.1  takemura sd*	at scsibus? target ? lun ?	# SCSI disk drives
    317  1.49  takemura cd*	at scsibus? target ? lun ?	# SCSI CD-ROM drives
    318   1.1  takemura 
    319   1.1  takemura pseudo-device	loop		1	# network loopback
    320  1.10     enami pseudo-device	ppp		2	# serial-line IP ports
    321  1.66  jdolecek pseudo-device	pty			# pseudo-terminals
    322   1.1  takemura pseudo-device	bpfilter	16	# packet filter ports
    323   1.1  takemura pseudo-device	ipfilter		# IP filter, NAT
    324   1.1  takemura 
    325   1.1  takemura pseudo-device	vnd		4	# virtual disk ick
    326  1.54      shin #pseudo-device	ccd		4	# concatenated disks
    327  1.43  takemura pseudo-device   rnd                     # /dev/random and in-kernel generator
    328   1.1  takemura 
    329   1.1  takemura pseudo-device	biconsdev	1	# build-in console device
    330  1.37  takemura pseudo-device	wsmux		2	# mouse & keyboard multiplexor
    331  1.49  takemura #pseudo-device	md		1	# memory disk device (ramdisk)
    332  1.49  takemura 
    333  1.49  takemura #pseudo-device	raid		4	# RAIDframe disk driver
    334  1.49  takemura #options	RAID_AUTOCONFIG		# auto-configuration of RAID components
    335  1.13       jun 
    336  1.13       jun # for IPv6
    337  1.13       jun pseudo-device	gif		4	# IPv[46] over IPv[46] tunnel (RFC1933)
    338  1.15    itojun #pseudo-device	faith		1	# IPv[46] tcp relay translation i/f
    339  1.44    itojun #pseudo-device	stf		1	# 6to4 IPv6 over IPv4 encapsulation
    340