1 # $Id: config.in,v 1.113 2002/01/24 22:14:44 davem Exp $
2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "Linux/SPARC Kernel Configuration"
20 config GENERIC_ISA_DMA
26 menu "General machine setup"
33 If you say Y here, you will get support for terminal devices with
34 display and keyboard devices. These are called "virtual" because you
35 can run several virtual terminals (also called virtual consoles) on
36 one physical terminal. This is rather useful, for example one
37 virtual terminal can collect system messages and warnings, another
38 one can be used for a text-mode user session, and a third could run
39 an X session, all in parallel. Switching between virtual terminals
40 is done with certain key combinations, usually Alt-<function key>.
42 The setterm command ("man setterm") can be used to change the
43 properties (such as colors or beeping) of a virtual terminal. The
44 man page console_codes(4) ("man console_codes") contains the special
45 character sequences that can be used to change those properties
46 directly. The fonts used on virtual terminals can be changed with
47 the setfont ("man setfont") command and the key bindings are defined
48 with the loadkeys ("man loadkeys") command.
50 You need at least one virtual terminal device in order to make use
51 of your keyboard and monitor. Therefore, only people configuring an
52 embedded system would want to say N here in order to save some
53 memory; the only way to log into such a system is then via a serial
54 or network connection.
56 If unsure, say Y, or else you won't be able to do much with your new
57 shiny Linux system :-)
63 The system console is the device which receives all kernel messages
64 and warnings and which allows logins in single user mode. If you
65 answer Y here, a virtual terminal (the device used to interact with
66 a physical terminal) can be used as system console. This is the most
67 common mode of operations, so you should say Y here unless you want
68 the kernel messages be output only to a serial port (in which case
69 you should say Y to "Console on serial port", below).
71 If you do say Y here, by default the currently visible virtual
72 terminal (/dev/tty0) will be used as system console. You can change
73 that with a kernel command line option such as "console=tty3" which
74 would use the third virtual terminal as system console. (Try "man
75 bootparam" or see the documentation of your boot loader (lilo or
76 loadlin) about how to pass options to the kernel at boot time.)
85 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
88 This enables support for systems with more than one CPU. If you have
89 a system with only one CPU, say N. If you have a system with more
92 If you say N here, the kernel will run on single and multiprocessor
93 machines, but will use only one CPU of a multiprocessor machine. If
94 you say Y here, the kernel will run on many, but not all,
95 singleprocessor machines. On a singleprocessor machine, the kernel
96 will run faster if you say N here.
98 People using multiprocessor machines who say Y here should also say
99 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
100 Management" code will be disabled if you say Y here.
102 See also the <file:Documentation/smp.txt>,
103 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
104 <http://www.tldp.org/docs.html#howto>.
106 If you don't know what to do here, say N.
109 int "Maximum number of CPUs (2-32)"
114 # Identify this as a Sparc32 build
119 SPARC is a family of RISC microprocessors designed and marketed by
120 Sun Microsystems, incorporated. They are very widely found in Sun
121 workstations and clones. This port covers the original 32-bit SPARC;
122 it is old and stable and usually considered one of the "big three"
123 along with the Intel and Alpha ports. The UltraLinux project
124 maintains both the SPARC32 and SPARC64 ports; its web page is
125 available at <http://www.ultralinux.org/>.
127 # Global things across all Sun machines.
131 ISA is found on Espresso only and is not supported currently.
137 EISA is not supported.
143 MCA is not supported.
149 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
150 computer. These are credit-card size devices such as network cards,
151 modems or hard drives often used with laptops computers. There are
152 actually two varieties of these cards: the older 16 bit PCMCIA cards
153 and the newer 32 bit CardBus cards. If you want to use CardBus
154 cards, you need to say Y here and also to "CardBus support" below.
156 To use your PC-cards, you will need supporting software from David
157 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
158 for location). Please also read the PCMCIA-HOWTO, available from
159 <http://www.tldp.org/docs.html#howto>.
161 To compile this driver as modules, choose M here: the
162 modules will be called pcmcia_core and ds.
172 config SERIAL_CONSOLE
176 If you say Y here, it will be possible to use a serial port as the
177 system console (the system console is the device which receives all
178 kernel messages and warnings and which allows logins in single user
179 mode). This could be useful if some terminal or printer is connected
182 Even if you say Y here, the currently visible virtual console
183 (/dev/tty0) will still be used as the system console by default, but
184 you can alter that using a kernel command line option such as
185 "console=ttyS1". (Try "man bootparam" or see the documentation of
186 your boot loader (silo) about how to pass options to the kernel at
189 If you don't have a graphics card installed and you say Y here, the
190 kernel will automatically use the first serial line, /dev/ttyS0, as
203 config RWSEM_GENERIC_SPINLOCK
207 config RWSEM_XCHGADD_ALGORITHM
210 config GENERIC_CALIBRATE_DELAY
214 config ARCH_MAY_HAVE_PC_FDC
222 Enable power management and CPU standby features on supported
226 bool "Support for SUN4 machines (disables SUN4[CDM] support)"
230 Say Y here if, and only if, your machine is a sun4. Note that
231 a kernel compiled with this option will run only on sun4.
232 (And the current version will probably work only on sun4/330.)
237 bool "Support for PCI and PS/2 keyboard/mouse"
239 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
240 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
241 All of these platforms are extremely obscure, so say N if unsure.
243 source "drivers/pci/Kconfig"
247 config SUN_OPENPROMFS
248 tristate "Openprom tree appears in /proc/openprom"
250 If you say Y, the OpenPROM device tree will be available as a
251 virtual file system, which you can mount to /proc/openprom by "mount
252 -t openpromfs none /proc/openprom".
254 To compile the /proc/openprom support as a module, choose M here: the
255 module will be called openpromfs.
257 Only choose N if you know in advance that you will not need to modify
258 OpenPROM settings on the running system.
260 source "fs/Kconfig.binfmt"
263 bool "SunOS binary emulation"
265 This allows you to run most SunOS binaries. If you want to do this,
266 say Y here and place appropriate files in /usr/gnemul/sunos. See
267 <http://www.ultralinux.org/faq.html> for more information. If you
268 want to run SunOS binaries on an Ultra you must also say Y to
269 "Kernel support for 32-bit a.out binaries" above.
277 source "drivers/Kconfig"
280 source "drivers/sbus/char/Kconfig"
283 # This one must be before the filesystem configs. -DaveM
285 menu "Unix98 PTY support"
288 bool "Unix98 PTY support"
290 A pseudo terminal (PTY) is a software device consisting of two
291 halves: a master and a slave. The slave device behaves identical to
292 a physical terminal; the master device is used by a process to
293 read data from and write data to the slave, thereby emulating a
294 terminal. Typical programs for the master side are telnet servers
297 Linux has traditionally used the BSD-like names /dev/ptyxx for
298 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
299 has a number of problems. The GNU C library glibc 2.1 and later,
300 however, supports the Unix98 naming standard: in order to acquire a
301 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
302 terminal is then made available to the process and the pseudo
303 terminal slave can be accessed as /dev/pts/<number>. What was
304 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
306 The entries in /dev/pts/ are created on the fly by a virtual
307 file system; therefore, if you say Y here you should say Y to
308 "/dev/pts file system for Unix98 PTYs" as well.
310 If you want to say Y here, you need to have the C library glibc 2.1
311 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
312 Read the instructions in <file:Documentation/Changes> pertaining to
313 pseudo terminals. It's safe to say N.
315 config UNIX98_PTY_COUNT
316 int "Maximum number of Unix98 PTYs in use (0-2048)"
317 depends on UNIX98_PTYS
320 The maximum number of Unix98 PTYs that can be used at any one time.
321 The default is 256, and should be enough for desktop systems. Server
322 machines which support incoming telnet/rlogin/ssh connections and/or
323 serve several X terminals may want to increase this: every incoming
324 connection and every xterm uses up one PTY.
326 When not in use, each additional set of 256 PTYs occupy
327 approximately 8 KB of kernel memory on 32-bit architectures.
333 source "arch/sparc/Kconfig.debug"
335 source "security/Kconfig"
337 source "crypto/Kconfig"