Documentation/m68k/kernel-options.txt

8 Author: Roman.Hodek@informatik.uni-erlangen.de (Roman Hodek)
9 Update: jds@kom.auc.dk (Jes Sorensen) and faq@linux-m68k.org (Chris Lawrence)
56 ----------
65   The first syntax gives the device by name. These names are converted
72 Valid names are:
74   /dev/ram: -> 0x0100 (initial ramdisk)
75   /dev/hda: -> 0x0300 (first IDE disk)
76   /dev/hdb: -> 0x0340 (second IDE disk)
77   /dev/sda: -> 0x0800 (first SCSI disk)
78   /dev/sdb: -> 0x0810 (second SCSI disk)
79   /dev/sdc: -> 0x0820 (third SCSI disk)
80   /dev/sdd: -> 0x0830 (forth SCSI disk)
81   /dev/sde: -> 0x0840 (fifth SCSI disk)
82   /dev/fd : -> 0x0200 (floppy disk)
83   /dev/xda: -> 0x0c00 (first XT disk, unused in Linux/m68k)
84   /dev/xdb: -> 0x0c40 (second XT disk, unused in Linux/m68k)
105   This unusual translation of device names has some strange
127 SCSI CD-ROM drive, you boot from it by "root=0b00". Here, hex "0b" =
128 decimal 11 is the major of SCSI CD-ROMs, and the minor 0 stands for
135 "root=PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF".  It is also
139 00112233-4455-6677-8899-AABBCCDDEEFF then partition 3 may be found as
141   PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=-2
144 "Documentation/kernel-parameters.txt".
148 -----------
154 filesystem read-only or read-write. The default is read-only, except
155 for ramdisks, which default to read-write.
159 ----------
169 -----------
186 2.3) and at run time with "dmesg -n 8".
190  - "ser": built-in serial port; parameters: 9600bps, 8N1
191  - "mem": Save the messages to a reserved area in chip mem. After
197  - "ser1": ST-MFP serial port ("Modem1"); parameters: 9600bps, 8N1
198  - "ser2": SCC channel B serial port ("Modem2"); parameters: 9600bps, 8N1
199  - "ser" : default serial port
201  - "midi": The MIDI port; parameters: 31250bps, 8N1
202  - "par" : parallel port
210 -------------
227 -----------
236 -----------
238 Syntax: ether=[<irq>[,<base_addr>[,<mem_start>[,<mem_end>]]]],<dev-name>
240   <dev-name> is the name of a net driver, as specified in
244   The non-ethernet drivers (sl, ppp, dummy, lo) obviously ignore the
247 are really Plug-'n-Play, so the "ether=" option is useless altogether
252 --------
265 -------------------
276 --------
281 the number of 512-byte buffers reserved for tape operations for each
289 --------------
291 Syntax: dmasound=[<buffers>,<buffer-size>[,<catch-radius>]]
295 to use (minimum 4, default 4), <buffer-size> is the size of each
296 buffer in kilobytes (minimum 4, default 32) and <catch-radius> says
299 AU-Files on the Falcon with its hardware frequency of 8195Hz and thus
308 -----------
310 Syntax: video=<fbname>:<sub-options...>
314 <sub-options> is a comma-separated list of the sub-options listed
319     might need to update your boot-scripts if upgrading to 2.x from
326 -----------------
328 This sub-option may be any of the predefined video modes, as listed
331 mode, if the hardware allows. Currently defined names are:
333  - stlow           : 320x200x4
334  - stmid, default5 : 640x200x2
335  - sthigh, default4: 640x400x1
336  - ttlow           : 320x480x8, TT only
337  - ttmid, default1 : 640x480x4, TT only
338  - tthigh, default2: 1280x960x1, TT only
339  - vga2            : 640x480x1, Falcon only
340  - vga4            : 640x480x2, Falcon only
341  - vga16, default3 : 640x480x4, Falcon only
342  - vga256          : 640x480x8, Falcon only
343  - falh2           : 896x608x1, Falcon only
344  - falh16          : 896x608x4, Falcon only
347 modes names "default<n>" in turn, until one is possible with the
351 activated by a "external:" sub-option.
354 --------------
361 -----------
371 ----------------
389 ----------------
407 ----------------
423   The first 3 parameters of this sub-option should be obvious: <xres>,
435 	  built-in Atari video modes, I think there is no card that
490 initialisation of the video-card.
492 therefore we don't support hardware-dependent functions like hardware-scroll,
496 --------------
498 The external pixel clock attached to the Falcon VIDEL shifter. This
502 -------------------
507 with a fixed-frequency monitor! For now, only the Falcon frame buffer
519 ------------
535 --------------
537 Syntax: atamouse=<x-threshold>,[<y-threshold>]
553 -------------
564    track buffering (1) or not (0). The default is machine-dependent:
572 -------------
574 Syntax: atascsi=<can_queue>[,<cmd_per_lun>[,<scat-gat>[,<host-id>[,<tagged>]]]]
579 defaults depend on whether TT-style or Falcon-style SCSI is used.
581 TT-SCSI and the latter to Falcon-SCSI. If an illegal value is given
605       no scatter-gather  : cmd_per_lun * 232 bytes
606       full scatter-gather: cmd_per_lun * approx. 17 Kbytes
608   <scat-gat>:
609     Size of the scatter-gather table, i.e. the number of requests
612     value is forced to 0 on a Falcon, since scatter-gather isn't
613     possible with the ST-DMA. Not using scatter-gather hurts
616   <host-id>:
619     be unique. Default: determined at run time: If the NV-RAM checksum
620     is valid, and bit 7 in byte 30 of the NV-RAM is set, the lower 3
634     tagged queuing (:-().
637 -------------
645   The <list of switches> is a comma-separated list of the following
662 switch-on is done after video initialization, and somehow synchronized
668 earlier initialization ("ov_"-less) takes precedence. But the
669 switching-off on reset still happens in this case.
675 -----------
677 Syntax: video=<fbname>:<sub-options...>
686 The <sub-options> is a comma-separated list of the sub-options listed
688 "video"-option (4.1), but knows fewer sub-options.
691 -----------------
700  - ntsc            : 640x200, 15 kHz, 60 Hz
701  - ntsc-lace       : 640x400, 15 kHz, 60 Hz interlaced
703  - pal             : 640x256, 15 kHz, 50 Hz
704  - pal-lace        : 640x512, 15 kHz, 50 Hz interlaced
706  - multiscan       : 640x480, 29 kHz, 57 Hz
707  - multiscan-lace  : 640x960, 29 kHz, 57 Hz interlaced
708  - euro36          : 640x200, 15 kHz, 72 Hz
709  - euro36-lace     : 640x400, 15 kHz, 72 Hz interlaced
710  - euro72          : 640x400, 29 kHz, 68 Hz
711  - euro72-lace     : 640x800, 29 kHz, 68 Hz interlaced
712  - super72         : 800x300, 23 kHz, 70 Hz
713  - super72-lace    : 800x600, 23 kHz, 70 Hz interlaced
714  - dblntsc-ff      : 640x400, 27 kHz, 57 Hz
715  - dblntsc-lace    : 640x800, 27 kHz, 57 Hz interlaced
716  - dblpal-ff       : 640x512, 27 kHz, 47 Hz
717  - dblpal-lace     : 640x1024, 27 kHz, 47 Hz interlaced
718  - dblntsc         : 640x200, 27 kHz, 57 Hz doublescan
719  - dblpal          : 640x256, 27 kHz, 47 Hz doublescan
721  - vga             : 640x480, 31 kHz, 60 Hz
722  - vga70           : 640x400, 31 kHz, 70 Hz
725 chipset, and that these modes are limited to 2-bit color for the ECS
726 chipset and 8-bit color for the AGA chipset.
729 ------------
731 Syntax: depth:<nr. of bit-planes>
733 Specify the number of bit-planes for the selected video-mode.
736 --------------
739 "inverse" sub-option for the Atari.
742 -----------
747 "font" sub-option for the Atari, except that `PEARL8x8' is used instead
752 -------------------
767 ----------------
776 -------------
778 Syntax: wd33c93=<sub-options...>
783 The <sub-options> is a comma-separated list of the sub-options listed
787 -------------
793 device. To maintain backwards compatibility, a command-line such as
799 -------------
804 period. Default is 500; acceptable values are 250 - 1000.
807 -----------------
816 ------------
821 types of debug output to printed - see the DB_xxx defines in
824 5.3.5) clock
825 ------------
827 Syntax: clock:x
829   x = clock input in MHz for WD33c93 chip. Normal values would be from
833 hostadapter and the SCSI-clock jumper present on some GVP
837 -----------
840 than one wd33c93-based host adapter in the system.
843 ------------
856 -----------
858 Syntax: gvp11=<addr-mask>
861 address-mask settings correctly which made it necessary for some