diff options
Diffstat (limited to 'Documentation/m68k')
-rw-r--r-- | Documentation/m68k/buddha-driver.rst (renamed from Documentation/m68k/README.buddha) | 95 | ||||
-rw-r--r-- | Documentation/m68k/index.rst | 18 | ||||
-rw-r--r-- | Documentation/m68k/kernel-options.rst (renamed from Documentation/m68k/kernel-options.txt) | 319 |
3 files changed, 238 insertions, 194 deletions
diff --git a/Documentation/m68k/README.buddha b/Documentation/m68k/buddha-driver.rst index 3ea9827ba3c7..20e401413991 100644 --- a/Documentation/m68k/README.buddha +++ b/Documentation/m68k/buddha-driver.rst @@ -1,3 +1,6 @@ +===================================== +Amiga Buddha and Catweasel IDE Driver +===================================== The Amiga Buddha and Catweasel IDE Driver (part of ide.c) was written by Geert Uytterhoeven based on the following specifications: @@ -12,12 +15,12 @@ described in their manuals, no tricks have been used (for example leaving some address lines out of the equations...). If you want to configure the board yourself (for example let a Linux kernel configure the card), look at the Commodore -Docs. Reading the nibbles should give this information: +Docs. Reading the nibbles should give this information:: -Vendor number: 4626 ($1212) -product number: 0 (42 for Catweasel Z-II) -Serial number: 0 -Rom-vector: $1000 + Vendor number: 4626 ($1212) + product number: 0 (42 for Catweasel Z-II) + Serial number: 0 + Rom-vector: $1000 The card should be a Z-II board, size 64K, not for freemem list, Rom-Vektor is valid, no second Autoconfig-board on the @@ -34,6 +37,7 @@ otherwise your chance is only 1:16 to find the board :-). The local memory-map is even active when mapped to $e8: +============== =========================================== $0-$7e Autokonfig-space, see Z-II docs. $80-$7fd reserved @@ -50,50 +54,51 @@ $a00-$aff IDE-Select 2 (Port 1, Register set 0) $b00-$bff IDE-Select 3 (Port 1, Register set 1) $c00-$cff IDE-Select 4 (Port 2, Register set 0, - Catweasel only!) + Catweasel only!) $d00-$dff IDE-Select 5 (Port 3, Register set 1, - Catweasel only!) + Catweasel only!) -$e00-$eff local expansion port, on Catweasel Z-II the +$e00-$eff local expansion port, on Catweasel Z-II the Catweasel registers are also mapped here. Never touch, use multidisk.device! - -$f00 read only, Byte-access: Bit 7 shows the - level of the IRQ-line of IDE port 0. + +$f00 read only, Byte-access: Bit 7 shows the + level of the IRQ-line of IDE port 0. $f01-$f3f mirror of $f00 -$f40 read only, Byte-access: Bit 7 shows the - level of the IRQ-line of IDE port 1. +$f40 read only, Byte-access: Bit 7 shows the + level of the IRQ-line of IDE port 1. $f41-$f7f mirror of $f40 -$f80 read only, Byte-access: Bit 7 shows the - level of the IRQ-line of IDE port 2. +$f80 read only, Byte-access: Bit 7 shows the + level of the IRQ-line of IDE port 2. (Catweasel only!) $f81-$fbf mirror of $f80 $fc0 write-only: Writing any value to this - register enables IRQs to be passed from the - IDE ports to the Zorro bus. This mechanism - has been implemented to be compatible with + register enables IRQs to be passed from the + IDE ports to the Zorro bus. This mechanism + has been implemented to be compatible with harddisks that are either defective or have - a buggy firmware and pull the IRQ line up - while starting up. If interrupts would - always be passed to the bus, the computer - might not start up. Once enabled, this flag - can not be disabled again. The level of the - flag can not be determined by software + a buggy firmware and pull the IRQ line up + while starting up. If interrupts would + always be passed to the bus, the computer + might not start up. Once enabled, this flag + can not be disabled again. The level of the + flag can not be determined by software (what for? Write to me if it's necessary!). $fc1-$fff mirror of $fc0 $1000-$ffff Buddha-Rom with offset $1000 in the rom - chip. The addresses $0 to $fff of the rom + chip. The addresses $0 to $fff of the rom chip cannot be read. Rom is Byte-wide and mapped to even addresses. +============== =========================================== The IDE ports issue an INT2. You can read the level of the IRQ-lines of the IDE-ports by reading from the three (two @@ -128,7 +133,8 @@ must always be set to 1 to be compatible with later Buddha versions (if I'll ever update this one). I presume that I'll never use the lower four bits, but they have to be set to 1 by definition. - The values in this table have to be shifted 5 bits to the + +The values in this table have to be shifted 5 bits to the left and or'd with $1f (this sets the lower 5 bits). All the timings have in common: Select and IOR/IOW rise at @@ -138,44 +144,36 @@ values are no multiple of 71. One clock-cycle is 71ns long (exactly 70,5 at 14,18 Mhz on PAL systems). value 0 (Default after reset) - -497ns Select (7 clock cycles) , IOR/IOW after 172ns (2 clock cycles) -(same timing as the Amiga 1200 does on it's IDE port without -accelerator card) + 497ns Select (7 clock cycles) , IOR/IOW after 172ns (2 clock cycles) + (same timing as the Amiga 1200 does on it's IDE port without + accelerator card) value 1 - -639ns Select (9 clock cycles), IOR/IOW after 243ns (3 clock cycles) + 639ns Select (9 clock cycles), IOR/IOW after 243ns (3 clock cycles) value 2 - -781ns Select (11 clock cycles), IOR/IOW after 314ns (4 clock cycles) + 781ns Select (11 clock cycles), IOR/IOW after 314ns (4 clock cycles) value 3 - -355ns Select (5 clock cycles), IOR/IOW after 101ns (1 clock cycle) + 355ns Select (5 clock cycles), IOR/IOW after 101ns (1 clock cycle) value 4 - -355ns Select (5 clock cycles), IOR/IOW after 172ns (2 clock cycles) + 355ns Select (5 clock cycles), IOR/IOW after 172ns (2 clock cycles) value 5 - -355ns Select (5 clock cycles), IOR/IOW after 243ns (3 clock cycles) + 355ns Select (5 clock cycles), IOR/IOW after 243ns (3 clock cycles) value 6 - -1065ns Select (15 clock cycles), IOR/IOW after 314ns (4 clock cycles) + 1065ns Select (15 clock cycles), IOR/IOW after 314ns (4 clock cycles) value 7 - -355ns Select, (5 clock cycles), IOR/IOW after 101ns (1 clock cycle) + 355ns Select, (5 clock cycles), IOR/IOW after 101ns (1 clock cycle) When accessing IDE registers with A6=1 (for example $84x), the timing will always be mode 0 8-bit compatible, no matter what you have selected in the speed register: -781ns select, IOR/IOW after 4 clock cycles (=314ns) aktive. +781ns select, IOR/IOW after 4 clock cycles (=314ns) aktive. All the timings with a very short select-signal (the 355ns fast accesses) depend on the accelerator card used in the @@ -204,7 +202,8 @@ always shows a "no IRQ here" on the Buddha, and accesses to the third IDE port are going into data's Nirwana on the Buddha. - Jens Schönfeld february 19th, 1997 - updated may 27th, 1997 - eMail: sysop@nostlgic.tng.oche.de +Jens Schönfeld february 19th, 1997 + +updated may 27th, 1997 +eMail: sysop@nostlgic.tng.oche.de diff --git a/Documentation/m68k/index.rst b/Documentation/m68k/index.rst new file mode 100644 index 000000000000..b89cb6a86d9b --- /dev/null +++ b/Documentation/m68k/index.rst @@ -0,0 +1,18 @@ +.. SPDX-License-Identifier: GPL-2.0 + +================= +m68k Architecture +================= + +.. toctree:: + :maxdepth: 2 + + kernel-options + buddha-driver + +.. only:: subproject and html + + Indices + ======= + + * :ref:`genindex` diff --git a/Documentation/m68k/kernel-options.txt b/Documentation/m68k/kernel-options.rst index 79d21246c75a..cabd9419740d 100644 --- a/Documentation/m68k/kernel-options.txt +++ b/Documentation/m68k/kernel-options.rst @@ -1,22 +1,24 @@ - - - Command Line Options for Linux/m68k - =================================== +=================================== +Command Line Options for Linux/m68k +=================================== Last Update: 2 May 1999 + Linux/m68k version: 2.2.6 + Author: Roman.Hodek@informatik.uni-erlangen.de (Roman Hodek) + Update: jds@kom.auc.dk (Jes Sorensen) and faq@linux-m68k.org (Chris Lawrence) 0) Introduction =============== - Often I've been asked which command line options the Linux/m68k +Often I've been asked which command line options the Linux/m68k kernel understands, or how the exact syntax for the ... option is, or ... about the option ... . I hope, this document supplies all the answers... - Note that some options might be outdated, their descriptions being +Note that some options might be outdated, their descriptions being incomplete or missing. Please update the information and send in the patches. @@ -38,11 +40,11 @@ argument contains an '=', it is of class 2, and the definition is put into init's environment. All other arguments are passed to init as command line options. - This document describes the valid kernel options for Linux/m68k in +This document describes the valid kernel options for Linux/m68k in the version mentioned at the start of this file. Later revisions may add new such options, and some may be missing in older versions. - In general, the value (the part after the '=') of an option is a +In general, the value (the part after the '=') of an option is a list of values separated by commas. The interpretation of these values is up to the driver that "owns" the option. This association of options with drivers is also the reason that some are further @@ -55,21 +57,21 @@ subdivided. 2.1) root= ---------- -Syntax: root=/dev/<device> - or: root=<hex_number> +:Syntax: root=/dev/<device> +:or: root=<hex_number> This tells the kernel which device it should mount as the root filesystem. The device must be a block device with a valid filesystem on it. - The first syntax gives the device by name. These names are converted +The first syntax gives the device by name. These names are converted into a major/minor number internally in the kernel in an unusual way. Normally, this "conversion" is done by the device files in /dev, but this isn't possible here, because the root filesystem (with /dev) isn't mounted yet... So the kernel parses the name itself, with some hardcoded name to number mappings. The name must always be a combination of two or three letters, followed by a decimal number. -Valid names are: +Valid names are:: /dev/ram: -> 0x0100 (initial ramdisk) /dev/hda: -> 0x0300 (first IDE disk) @@ -81,7 +83,7 @@ Valid names are: /dev/sde: -> 0x0840 (fifth SCSI disk) /dev/fd : -> 0x0200 (floppy disk) - The name must be followed by a decimal number, that stands for the +The name must be followed by a decimal number, that stands for the partition number. Internally, the value of the number is just added to the device number mentioned in the table above. The exceptions are /dev/ram and /dev/fd, where /dev/ram refers to an @@ -100,12 +102,12 @@ the kernel command line. [Strange and maybe uninteresting stuff ON] - This unusual translation of device names has some strange +This unusual translation of device names has some strange consequences: If, for example, you have a symbolic link from /dev/fd to /dev/fd0D720 as an abbreviation for floppy driver #0 in DD format, you cannot use this name for specifying the root device, because the kernel cannot see this symlink before mounting the root FS and it -isn't in the table above. If you use it, the root device will not be +isn't in the table above. If you use it, the root device will not be set at all, without an error message. Another example: You cannot use a partition on e.g. the sixth SCSI disk as the root filesystem, if you want to specify it by name. This is, because only the devices up to @@ -118,7 +120,7 @@ knowledge that each disk uses 16 minors, and write "root=/dev/sde17" [Strange and maybe uninteresting stuff OFF] - If the device containing your root partition isn't in the table +If the device containing your root partition isn't in the table above, you can also specify it by major and minor numbers. These are written in hex, with no prefix and no separator between. E.g., if you have a CD with contents appropriate as a root filesystem in the first @@ -136,6 +138,7 @@ known partition UUID as the starting point. For example, if partition 5 of the device has the UUID of 00112233-4455-6677-8899-AABBCCDDEEFF then partition 3 may be found as follows: + PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=-2 Authoritative information can be found in @@ -145,8 +148,8 @@ Authoritative information can be found in 2.2) ro, rw ----------- -Syntax: ro - or: rw +:Syntax: ro +:or: rw These two options tell the kernel whether it should mount the root filesystem read-only or read-write. The default is read-only, except @@ -156,7 +159,7 @@ for ramdisks, which default to read-write. 2.3) debug ---------- -Syntax: debug +:Syntax: debug This raises the kernel log level to 10 (the default is 7). This is the same level as set by the "dmesg" command, just that the maximum level @@ -166,7 +169,7 @@ selectable by dmesg is 8. 2.4) debug= ----------- -Syntax: debug=<device> +:Syntax: debug=<device> This option causes certain kernel messages be printed to the selected debugging device. This can aid debugging the kernel, since the @@ -175,7 +178,7 @@ devices are possible depends on the machine type. There are no checks for the validity of the device name. If the device isn't implemented, nothing happens. - Messages logged this way are in general stack dumps after kernel +Messages logged this way are in general stack dumps after kernel memory faults or bad kernel traps, and kernel panics. To be exact: all messages of level 0 (panic messages) and all messages printed while the log level is 8 or more (their level doesn't matter). Before stack @@ -185,19 +188,27 @@ at least 8 can also be set by the "debug" command line option (see Devices possible for Amiga: - - "ser": built-in serial port; parameters: 9600bps, 8N1 - - "mem": Save the messages to a reserved area in chip mem. After + - "ser": + built-in serial port; parameters: 9600bps, 8N1 + - "mem": + Save the messages to a reserved area in chip mem. After rebooting, they can be read under AmigaOS with the tool 'dmesg'. Devices possible for Atari: - - "ser1": ST-MFP serial port ("Modem1"); parameters: 9600bps, 8N1 - - "ser2": SCC channel B serial port ("Modem2"); parameters: 9600bps, 8N1 - - "ser" : default serial port + - "ser1": + ST-MFP serial port ("Modem1"); parameters: 9600bps, 8N1 + - "ser2": + SCC channel B serial port ("Modem2"); parameters: 9600bps, 8N1 + - "ser" : + default serial port This is "ser2" for a Falcon, and "ser1" for any other machine - - "midi": The MIDI port; parameters: 31250bps, 8N1 - - "par" : parallel port + - "midi": + The MIDI port; parameters: 31250bps, 8N1 + - "par" : + parallel port + The printing routine for this implements a timeout for the case there's no printer connected (else the kernel would lock up). The timeout is not exact, but usually a few @@ -205,26 +216,29 @@ Devices possible for Atari: 2.6) ramdisk_size= -------------- +------------------ -Syntax: ramdisk_size=<size> +:Syntax: ramdisk_size=<size> - This option instructs the kernel to set up a ramdisk of the given +This option instructs the kernel to set up a ramdisk of the given size in KBytes. Do not use this option if the ramdisk contents are passed by bootstrap! In this case, the size is selected automatically and should not be overwritten. - The only application is for root filesystems on floppy disks, that +The only application is for root filesystems on floppy disks, that should be loaded into memory. To do that, select the corresponding size of the disk as ramdisk size, and set the root device to the disk drive (with "root="). 2.7) swap= + + I can't find any sign of this option in 2.2.6. + 2.8) buff= ----------- - I can't find any sign of these options in 2.2.6. + I can't find any sign of this option in 2.2.6. 3) General Device Options (Amiga and Atari) @@ -233,13 +247,13 @@ drive (with "root="). 3.1) ether= ----------- -Syntax: ether=[<irq>[,<base_addr>[,<mem_start>[,<mem_end>]]]],<dev-name> +:Syntax: ether=[<irq>[,<base_addr>[,<mem_start>[,<mem_end>]]]],<dev-name> - <dev-name> is the name of a net driver, as specified in +<dev-name> is the name of a net driver, as specified in drivers/net/Space.c in the Linux source. Most prominent are eth0, ... eth3, sl0, ... sl3, ppp0, ..., ppp3, dummy, and lo. - The non-ethernet drivers (sl, ppp, dummy, lo) obviously ignore the +The non-ethernet drivers (sl, ppp, dummy, lo) obviously ignore the settings by this options. Also, the existing ethernet drivers for Linux/m68k (ariadne, a2065, hydra) don't use them because Zorro boards are really Plug-'n-Play, so the "ether=" option is useless altogether @@ -249,9 +263,9 @@ for Linux/m68k. 3.2) hd= -------- -Syntax: hd=<cylinders>,<heads>,<sectors> +:Syntax: hd=<cylinders>,<heads>,<sectors> - This option sets the disk geometry of an IDE disk. The first hd= +This option sets the disk geometry of an IDE disk. The first hd= option is for the first IDE disk, the second for the second one. (I.e., you can give this option twice.) In most cases, you won't have to use this option, since the kernel can obtain the geometry data @@ -262,9 +276,9 @@ disks. 3.3) max_scsi_luns= ------------------- -Syntax: max_scsi_luns=<n> +:Syntax: max_scsi_luns=<n> - Sets the maximum number of LUNs (logical units) of SCSI devices to +Sets the maximum number of LUNs (logical units) of SCSI devices to be scanned. Valid values for <n> are between 1 and 8. Default is 8 if "Probe all LUNs on each SCSI device" was selected during the kernel configuration, else 1. @@ -273,9 +287,9 @@ configuration, else 1. 3.4) st= -------- -Syntax: st=<buffer_size>,[<write_thres>,[<max_buffers>]] +:Syntax: st=<buffer_size>,[<write_thres>,[<max_buffers>]] - Sets several parameters of the SCSI tape driver. <buffer_size> is +Sets several parameters of the SCSI tape driver. <buffer_size> is the number of 512-byte buffers reserved for tape operations for each device. <write_thres> sets the number of blocks which must be filled to start an actual write operation to the tape. Maximum value is the @@ -286,9 +300,9 @@ buffers allocated for all tape devices. 3.5) dmasound= -------------- -Syntax: dmasound=[<buffers>,<buffer-size>[,<catch-radius>]] +:Syntax: dmasound=[<buffers>,<buffer-size>[,<catch-radius>]] - This option controls some configurations of the Linux/m68k DMA sound +This option controls some configurations of the Linux/m68k DMA sound driver (Amiga and Atari): <buffers> is the number of buffers you want to use (minimum 4, default 4), <buffer-size> is the size of each buffer in kilobytes (minimum 4, default 32) and <catch-radius> says @@ -305,20 +319,22 @@ don't need to expand the sound. 4.1) video= ----------- -Syntax: video=<fbname>:<sub-options...> +:Syntax: video=<fbname>:<sub-options...> The <fbname> parameter specifies the name of the frame buffer, -eg. most atari users will want to specify `atafb' here. The +eg. most atari users will want to specify `atafb` here. The <sub-options> is a comma-separated list of the sub-options listed below. -NB: Please notice that this option was renamed from `atavideo' to - `video' during the development of the 1.3.x kernels, thus you +NB: + Please notice that this option was renamed from `atavideo` to + `video` during the development of the 1.3.x kernels, thus you might need to update your boot-scripts if upgrading to 2.x from an 1.2.x kernel. -NBB: The behavior of video= was changed in 2.1.57 so the recommended -option is to specify the name of the frame buffer. +NBB: + The behavior of video= was changed in 2.1.57 so the recommended + option is to specify the name of the frame buffer. 4.1.1) Video Mode ----------------- @@ -341,11 +357,11 @@ mode, if the hardware allows. Currently defined names are: - falh2 : 896x608x1, Falcon only - falh16 : 896x608x4, Falcon only - If no video mode is given on the command line, the kernel tries the +If no video mode is given on the command line, the kernel tries the modes names "default<n>" in turn, until one is possible with the hardware in use. - A video mode setting doesn't make sense, if the external driver is +A video mode setting doesn't make sense, if the external driver is activated by a "external:" sub-option. 4.1.2) inverse @@ -358,17 +374,17 @@ option, you can make the background white. 4.1.3) font ----------- -Syntax: font:<fontname> +:Syntax: font:<fontname> Specify the font to use in text modes. Currently you can choose only -between `VGA8x8', `VGA8x16' and `PEARL8x8'. `VGA8x8' is default, if the +between `VGA8x8`, `VGA8x16` and `PEARL8x8`. `VGA8x8` is default, if the vertical size of the display is less than 400 pixel rows. Otherwise, the -`VGA8x16' font is the default. +`VGA8x16` font is the default. -4.1.4) hwscroll_ ----------------- +4.1.4) `hwscroll_` +------------------ -Syntax: hwscroll_<n> +:Syntax: `hwscroll_<n>` The number of additional lines of video memory to reserve for speeding up the scrolling ("hardware scrolling"). Hardware scrolling @@ -378,7 +394,7 @@ possible with plain STs and graphics cards (The former because the base address must be on a 256 byte boundary there, the latter because the kernel doesn't know how to set the base address at all.) - By default, <n> is set to the number of visible text lines on the +By default, <n> is set to the number of visible text lines on the display. Thus, the amount of video memory is doubled, compared to no hardware scrolling. You can turn off the hardware scrolling altogether by setting <n> to 0. @@ -386,31 +402,31 @@ by setting <n> to 0. 4.1.5) internal: ---------------- -Syntax: internal:<xres>;<yres>[;<xres_max>;<yres_max>;<offset>] +:Syntax: internal:<xres>;<yres>[;<xres_max>;<yres_max>;<offset>] This option specifies the capabilities of some extended internal video hardware, like e.g. OverScan. <xres> and <yres> give the (extended) dimensions of the screen. - If your OverScan needs a black border, you have to write the last +If your OverScan needs a black border, you have to write the last three arguments of the "internal:". <xres_max> is the maximum line length the hardware allows, <yres_max> the maximum number of lines. <offset> is the offset of the visible part of the screen memory to its physical start, in bytes. - Often, extended interval video hardware has to be activated somehow. +Often, extended interval video hardware has to be activated somehow. For this, see the "sw_*" options below. 4.1.6) external: ---------------- -Syntax: - external:<xres>;<yres>;<depth>;<org>;<scrmem>[;<scrlen>[;<vgabase>\ - [;<colw>[;<coltype>[;<xres_virtual>]]]]] +:Syntax: + external:<xres>;<yres>;<depth>;<org>;<scrmem>[;<scrlen>[;<vgabase> + [;<colw>[;<coltype>[;<xres_virtual>]]]]] -[I had to break this line...] +.. I had to break this line... - This is probably the most complicated parameter... It specifies that +This is probably the most complicated parameter... It specifies that you have some external video hardware (a graphics board), and how to use it under Linux/m68k. The kernel cannot know more about the hardware than you tell it here! The kernel also is unable to set or change any @@ -418,38 +434,44 @@ video modes, since it doesn't know about any board internal. So, you have to switch to that video mode before you start Linux, and cannot switch to another mode once Linux has started. - The first 3 parameters of this sub-option should be obvious: <xres>, +The first 3 parameters of this sub-option should be obvious: <xres>, <yres> and <depth> give the dimensions of the screen and the number of planes (depth). The depth is the logarithm to base 2 of the number of colors possible. (Or, the other way round: The number of colors is 2^depth). - You have to tell the kernel furthermore how the video memory is +You have to tell the kernel furthermore how the video memory is organized. This is done by a letter as <org> parameter: - 'n': "normal planes", i.e. one whole plane after another - 'i': "interleaved planes", i.e. 16 bit of the first plane, than 16 bit + 'n': + "normal planes", i.e. one whole plane after another + 'i': + "interleaved planes", i.e. 16 bit of the first plane, than 16 bit of the next, and so on... This mode is used only with the - built-in Atari video modes, I think there is no card that - supports this mode. - 'p': "packed pixels", i.e. <depth> consecutive bits stand for all - planes of one pixel; this is the most common mode for 8 planes - (256 colors) on graphic cards - 't': "true color" (more or less packed pixels, but without a color - lookup table); usually depth is 24 + built-in Atari video modes, I think there is no card that + supports this mode. + 'p': + "packed pixels", i.e. <depth> consecutive bits stand for all + planes of one pixel; this is the most common mode for 8 planes + (256 colors) on graphic cards + 't': + "true color" (more or less packed pixels, but without a color + lookup table); usually depth is 24 For monochrome modes (i.e., <depth> is 1), the <org> letter has a different meaning: - 'n': normal colors, i.e. 0=white, 1=black - 'i': inverted colors, i.e. 0=black, 1=white + 'n': + normal colors, i.e. 0=white, 1=black + 'i': + inverted colors, i.e. 0=black, 1=white - The next important information about the video hardware is the base +The next important information about the video hardware is the base address of the video memory. That is given in the <scrmem> parameter, as a hexadecimal number with a "0x" prefix. You have to find out this address in the documentation of your hardware. - The next parameter, <scrlen>, tells the kernel about the size of the +The next parameter, <scrlen>, tells the kernel about the size of the video memory. If it's missing, the size is calculated from <xres>, <yres>, and <depth>. For now, it is not useful to write a value here. It would be used only for hardware scrolling (which isn't possible @@ -460,7 +482,7 @@ empty, either by ending the "external:" after the video address or by writing two consecutive semicolons, if you want to give a <vgabase> (it is allowed to leave this parameter empty). - The <vgabase> parameter is optional. If it is not given, the kernel +The <vgabase> parameter is optional. If it is not given, the kernel cannot read or write any color registers of the video hardware, and thus you have to set appropriate colors before you start Linux. But if your card is somehow VGA compatible, you can tell the kernel the base @@ -472,18 +494,18 @@ uses the addresses vgabase+0x3c7...vgabase+0x3c9. The <vgabase> parameter is written in hexadecimal with a "0x" prefix, just as <scrmem>. - <colw> is meaningful only if <vgabase> is specified. It tells the +<colw> is meaningful only if <vgabase> is specified. It tells the kernel how wide each of the color register is, i.e. the number of bits per single color (red/green/blue). Default is 6, another quite usual value is 8. - Also <coltype> is used together with <vgabase>. It tells the kernel +Also <coltype> is used together with <vgabase>. It tells the kernel about the color register model of your gfx board. Currently, the types "vga" (which is also the default) and "mv300" (SANG MV300) are implemented. - Parameter <xres_virtual> is required for ProMST or ET4000 cards where -the physical linelength differs from the visible length. With ProMST, +Parameter <xres_virtual> is required for ProMST or ET4000 cards where +the physical linelength differs from the visible length. With ProMST, xres_virtual must be set to 2048. For ET4000, xres_virtual depends on the initialisation of the video-card. If you're missing a corresponding yres_virtual: the external part is legacy, @@ -499,13 +521,13 @@ currently works only with the ScreenWonder! 4.1.8) monitorcap: ------------------- -Syntax: monitorcap:<vmin>;<vmax>;<hmin>;<hmax> +:Syntax: monitorcap:<vmin>;<vmax>;<hmin>;<hmax> This describes the capabilities of a multisync monitor. Don't use it with a fixed-frequency monitor! For now, only the Falcon frame buffer uses the settings of "monitorcap:". - <vmin> and <vmax> are the minimum and maximum, resp., vertical frequencies +<vmin> and <vmax> are the minimum and maximum, resp., vertical frequencies your monitor can work with, in Hz. <hmin> and <hmax> are the same for the horizontal frequency, in kHz. @@ -520,28 +542,28 @@ If this option is given, the framebuffer device doesn't do any video mode calculations and settings on its own. The only Atari fb device that does this currently is the Falcon. - What you reach with this: Settings for unknown video extensions +What you reach with this: Settings for unknown video extensions aren't overridden by the driver, so you can still use the mode found when booting, when the driver doesn't know to set this mode itself. But this also means, that you can't switch video modes anymore... - An example where you may want to use "keep" is the ScreenBlaster for +An example where you may want to use "keep" is the ScreenBlaster for the Falcon. 4.2) atamouse= -------------- -Syntax: atamouse=<x-threshold>,[<y-threshold>] +:Syntax: atamouse=<x-threshold>,[<y-threshold>] - With this option, you can set the mouse movement reporting threshold. +With this option, you can set the mouse movement reporting threshold. This is the number of pixels of mouse movement that have to accumulate before the IKBD sends a new mouse packet to the kernel. Higher values reduce the mouse interrupt load and thus reduce the chance of keyboard overruns. Lower values give a slightly faster mouse responses and slightly better mouse tracking. - You can set the threshold in x and y separately, but usually this is +You can set the threshold in x and y separately, but usually this is of little practical use. If there's just one number in the option, it is used for both dimensions. The default value is 2 for both thresholds. @@ -550,7 +572,7 @@ thresholds. 4.3) ataflop= ------------- -Syntax: ataflop=<drive type>[,<trackbuffering>[,<steprateA>[,<steprateB>]]] +:Syntax: ataflop=<drive type>[,<trackbuffering>[,<steprateA>[,<steprateB>]]] The drive type may be 0, 1, or 2, for DD, HD, and ED, resp. This setting affects how many buffers are reserved and which formats are @@ -563,15 +585,15 @@ Syntax: ataflop=<drive type>[,<trackbuffering>[,<steprateA>[,<steprateB>]]] no for the Medusa and yes for all others. With the two following parameters, you can change the default - steprate used for drive A and B, resp. + steprate used for drive A and B, resp. 4.4) atascsi= ------------- -Syntax: atascsi=<can_queue>[,<cmd_per_lun>[,<scat-gat>[,<host-id>[,<tagged>]]]] +:Syntax: atascsi=<can_queue>[,<cmd_per_lun>[,<scat-gat>[,<host-id>[,<tagged>]]]] - This option sets some parameters for the Atari native SCSI driver. +This option sets some parameters for the Atari native SCSI driver. Generally, any number of arguments can be omitted from the end. And for each of the numbers, a negative value means "use default". The defaults depend on whether TT-style or Falcon-style SCSI is used. @@ -597,11 +619,14 @@ ignored (others aren't affected). 32). Default: 8/1. (Note: Values > 1 seem to cause problems on a Falcon, cause not yet known.) - The <cmd_per_lun> value at a great part determines the amount of + The <cmd_per_lun> value at a great part determines the amount of memory SCSI reserves for itself. The formula is rather complicated, but I can give you some hints: - no scatter-gather : cmd_per_lun * 232 bytes - full scatter-gather: cmd_per_lun * approx. 17 Kbytes + + no scatter-gather: + cmd_per_lun * 232 bytes + full scatter-gather: + cmd_per_lun * approx. 17 Kbytes <scat-gat>: Size of the scatter-gather table, i.e. the number of requests @@ -634,19 +659,23 @@ ignored (others aren't affected). 4.5 switches= ------------- -Syntax: switches=<list of switches> +:Syntax: switches=<list of switches> - With this option you can switch some hardware lines that are often +With this option you can switch some hardware lines that are often used to enable/disable certain hardware extensions. Examples are OverScan, overclocking, ... - The <list of switches> is a comma-separated list of the following +The <list of switches> is a comma-separated list of the following items: - ikbd: set RTS of the keyboard ACIA high - midi: set RTS of the MIDI ACIA high - snd6: set bit 6 of the PSG port A - snd7: set bit 6 of the PSG port A + ikbd: + set RTS of the keyboard ACIA high + midi: + set RTS of the MIDI ACIA high + snd6: + set bit 6 of the PSG port A + snd7: + set bit 6 of the PSG port A It doesn't make sense to mention a switch more than once (no difference to only once), but you can give as many switches as you @@ -654,16 +683,16 @@ want to enable different features. The switch lines are set as early as possible during kernel initialization (even before determining the present hardware.) - All of the items can also be prefixed with "ov_", i.e. "ov_ikbd", -"ov_midi", ... These options are meant for switching on an OverScan +All of the items can also be prefixed with `ov_`, i.e. `ov_ikbd`, +`ov_midi`, ... These options are meant for switching on an OverScan video extension. The difference to the bare option is that the switch-on is done after video initialization, and somehow synchronized to the HBLANK. A speciality is that ov_ikbd and ov_midi are switched off before rebooting, so that OverScan is disabled and TOS boots correctly. - If you give an option both, with and without the "ov_" prefix, the -earlier initialization ("ov_"-less) takes precedence. But the +If you give an option both, with and without the `ov_` prefix, the +earlier initialization (`ov_`-less) takes precedence. But the switching-off on reset still happens in this case. 5) Options for Amiga Only: @@ -672,10 +701,10 @@ switching-off on reset still happens in this case. 5.1) video= ----------- -Syntax: video=<fbname>:<sub-options...> +:Syntax: video=<fbname>:<sub-options...> The <fbname> parameter specifies the name of the frame buffer, valid -options are `amifb', `cyber', 'virge', `retz3' and `clgen', provided +options are `amifb`, `cyber`, 'virge', `retz3` and `clgen`, provided that the respective frame buffer devices have been compiled into the kernel (or compiled as loadable modules). The behavior of the <fbname> option was changed in 2.1.57 so it is now recommended to specify this @@ -697,9 +726,11 @@ predefined video modes are available: NTSC modes: - ntsc : 640x200, 15 kHz, 60 Hz - ntsc-lace : 640x400, 15 kHz, 60 Hz interlaced + PAL modes: - pal : 640x256, 15 kHz, 50 Hz - pal-lace : 640x512, 15 kHz, 50 Hz interlaced + ECS modes: - multiscan : 640x480, 29 kHz, 57 Hz - multiscan-lace : 640x960, 29 kHz, 57 Hz interlaced @@ -715,6 +746,7 @@ ECS modes: - dblpal-lace : 640x1024, 27 kHz, 47 Hz interlaced - dblntsc : 640x200, 27 kHz, 57 Hz doublescan - dblpal : 640x256, 27 kHz, 47 Hz doublescan + VGA modes: - vga : 640x480, 31 kHz, 60 Hz - vga70 : 640x400, 31 kHz, 70 Hz @@ -726,7 +758,7 @@ chipset and 8-bit color for the AGA chipset. 5.1.2) depth ------------ -Syntax: depth:<nr. of bit-planes> +:Syntax: depth:<nr. of bit-planes> Specify the number of bit-planes for the selected video-mode. @@ -739,32 +771,32 @@ Use inverted display (black on white). Functionally the same as the 5.1.4) font ----------- -Syntax: font:<fontname> +:Syntax: font:<fontname> Specify the font to use in text modes. Functionally the same as the -"font" sub-option for the Atari, except that `PEARL8x8' is used instead -of `VGA8x8' if the vertical size of the display is less than 400 pixel +"font" sub-option for the Atari, except that `PEARL8x8` is used instead +of `VGA8x8` if the vertical size of the display is less than 400 pixel rows. 5.1.5) monitorcap: ------------------- -Syntax: monitorcap:<vmin>;<vmax>;<hmin>;<hmax> +:Syntax: monitorcap:<vmin>;<vmax>;<hmin>;<hmax> This describes the capabilities of a multisync monitor. For now, only the color frame buffer uses the settings of "monitorcap:". - <vmin> and <vmax> are the minimum and maximum, resp., vertical frequencies +<vmin> and <vmax> are the minimum and maximum, resp., vertical frequencies your monitor can work with, in Hz. <hmin> and <hmax> are the same for the horizontal frequency, in kHz. - The defaults are 50;90;15;38 (Generic Amiga multisync monitor). +The defaults are 50;90;15;38 (Generic Amiga multisync monitor). 5.2) fd_def_df0= ---------------- -Syntax: fd_def_df0=<value> +:Syntax: fd_def_df0=<value> Sets the df0 value for "silent" floppy drives. The value should be in hexadecimal with "0x" prefix. @@ -773,7 +805,7 @@ hexadecimal with "0x" prefix. 5.3) wd33c93= ------------- -Syntax: wd33c93=<sub-options...> +:Syntax: wd33c93=<sub-options...> These options affect the A590/A2091, A3000 and GVP Series II SCSI controllers. @@ -784,9 +816,9 @@ below. 5.3.1) nosync ------------- -Syntax: nosync:bitmask +:Syntax: nosync:bitmask - bitmask is a byte where the 1st 7 bits correspond with the 7 +bitmask is a byte where the 1st 7 bits correspond with the 7 possible SCSI devices. Set a bit to prevent sync negotiation on that device. To maintain backwards compatibility, a command-line such as "wd33c93=255" will be automatically translated to @@ -796,35 +828,35 @@ all devices, eg. nosync:0xff. 5.3.2) period ------------- -Syntax: period:ns +:Syntax: period:ns - `ns' is the minimum # of nanoseconds in a SCSI data transfer +`ns` is the minimum # of nanoseconds in a SCSI data transfer period. Default is 500; acceptable values are 250 - 1000. 5.3.3) disconnect ----------------- -Syntax: disconnect:x +:Syntax: disconnect:x - Specify x = 0 to never allow disconnects, 2 to always allow them. +Specify x = 0 to never allow disconnects, 2 to always allow them. x = 1 does 'adaptive' disconnects, which is the default and generally the best choice. 5.3.4) debug ------------ -Syntax: debug:x +:Syntax: debug:x - If `DEBUGGING_ON' is defined, x is a bit mask that causes various +If `DEBUGGING_ON` is defined, x is a bit mask that causes various types of debug output to printed - see the DB_xxx defines in wd33c93.h. 5.3.5) clock ------------ -Syntax: clock:x +:Syntax: clock:x - x = clock input in MHz for WD33c93 chip. Normal values would be from +x = clock input in MHz for WD33c93 chip. Normal values would be from 8 through 20. The default value depends on your hostadapter(s), default for the A3000 internal controller is 14, for the A2091 it's 8 and for the GVP hostadapters it's either 8 or 14, depending on the @@ -834,15 +866,15 @@ hostadapters. 5.3.6) next ----------- - No argument. Used to separate blocks of keywords when there's more +No argument. Used to separate blocks of keywords when there's more than one wd33c93-based host adapter in the system. 5.3.7) nodma ------------ -Syntax: nodma:x +:Syntax: nodma:x - If x is 1 (or if the option is just written as "nodma"), the WD33c93 +If x is 1 (or if the option is just written as "nodma"), the WD33c93 controller will not use DMA (= direct memory access) to access the Amiga's memory. This is useful for some systems (like A3000's and A4000's with the A3640 accelerator, revision 3.0) that have problems @@ -853,32 +885,27 @@ possible. 5.4) gvp11= ----------- -Syntax: gvp11=<addr-mask> +:Syntax: gvp11=<addr-mask> - The earlier versions of the GVP driver did not handle DMA +The earlier versions of the GVP driver did not handle DMA address-mask settings correctly which made it necessary for some people to use this option, in order to get their GVP controller running under Linux. These problems have hopefully been solved and the use of this option is now highly unrecommended! - Incorrect use can lead to unpredictable behavior, so please only use +Incorrect use can lead to unpredictable behavior, so please only use this option if you *know* what you are doing and have a reason to do so. In any case if you experience problems and need to use this option, please inform us about it by mailing to the Linux/68k kernel mailing list. - The address mask set by this option specifies which addresses are +The address mask set by this option specifies which addresses are valid for DMA with the GVP Series II SCSI controller. An address is valid, if no bits are set except the bits that are set in the mask, too. - Some versions of the GVP can only DMA into a 24 bit address range, +Some versions of the GVP can only DMA into a 24 bit address range, some can address a 25 bit address range while others can use the whole 32 bit address range for DMA. The correct setting depends on your controller and should be autodetected by the driver. An example is the 24 bit region which is specified by a mask of 0x00fffffe. - - -/* Local Variables: */ -/* mode: text */ -/* End: */ |