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"
29 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
31 This enables support for systems with more than one CPU. If you have
32 a system with only one CPU, say N. If you have a system with more
35 If you say N here, the kernel will run on single and multiprocessor
36 machines, but will use only one CPU of a multiprocessor machine. If
37 you say Y here, the kernel will run on many, but not all,
38 singleprocessor machines. On a singleprocessor machine, the kernel
39 will run faster if you say N here.
41 People using multiprocessor machines who say Y here should also say
42 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
43 Management" code will be disabled if you say Y here.
45 See also the <file:Documentation/smp.txt>,
46 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
47 <http://www.tldp.org/docs.html#howto>.
49 If you don't know what to do here, say N.
52 int "Maximum number of CPUs (2-32)"
61 # Identify this as a Sparc32 build
66 SPARC is a family of RISC microprocessors designed and marketed by
67 Sun Microsystems, incorporated. They are very widely found in Sun
68 workstations and clones. This port covers the original 32-bit SPARC;
69 it is old and stable and usually considered one of the "big three"
70 along with the Intel and Alpha ports. The UltraLinux project
71 maintains both the SPARC32 and SPARC64 ports; its web page is
72 available at <http://www.ultralinux.org/>.
74 # Global things across all Sun machines.
78 ISA is found on Espresso only and is not supported currently.
84 EISA is not supported.
96 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
97 computer. These are credit-card size devices such as network cards,
98 modems or hard drives often used with laptops computers. There are
99 actually two varieties of these cards: the older 16 bit PCMCIA cards
100 and the newer 32 bit CardBus cards. If you want to use CardBus
101 cards, you need to say Y here and also to "CardBus support" below.
103 To use your PC-cards, you will need supporting software from David
104 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
105 for location). Please also read the PCMCIA-HOWTO, available from
106 <http://www.tldp.org/docs.html#howto>.
108 To compile this driver as modules, choose M here: the
109 modules will be called pcmcia_core and ds.
119 config SERIAL_CONSOLE
123 If you say Y here, it will be possible to use a serial port as the
124 system console (the system console is the device which receives all
125 kernel messages and warnings and which allows logins in single user
126 mode). This could be useful if some terminal or printer is connected
129 Even if you say Y here, the currently visible virtual console
130 (/dev/tty0) will still be used as the system console by default, but
131 you can alter that using a kernel command line option such as
132 "console=ttyS1". (Try "man bootparam" or see the documentation of
133 your boot loader (silo) about how to pass options to the kernel at
136 If you don't have a graphics card installed and you say Y here, the
137 kernel will automatically use the first serial line, /dev/ttyS0, as
150 config RWSEM_GENERIC_SPINLOCK
154 config RWSEM_XCHGADD_ALGORITHM
157 config GENERIC_FIND_NEXT_BIT
161 config GENERIC_HWEIGHT
165 config GENERIC_CALIBRATE_DELAY
169 config ARCH_MAY_HAVE_PC_FDC
173 config ARCH_HAS_ILOG2_U32
177 config ARCH_HAS_ILOG2_U64
185 Enable power management and CPU standby features on supported
189 bool "Support for SUN4 machines (disables SUN4[CDM] support)"
193 Say Y here if, and only if, your machine is a sun4. Note that
194 a kernel compiled with this option will run only on sun4.
195 (And the current version will probably work only on sun4/330.)
200 bool "Support for PCI and PS/2 keyboard/mouse"
202 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
203 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
204 All of these platforms are extremely obscure, so say N if unsure.
206 source "drivers/pci/Kconfig"
210 config SUN_OPENPROMFS
211 tristate "Openprom tree appears in /proc/openprom"
213 If you say Y, the OpenPROM device tree will be available as a
214 virtual file system, which you can mount to /proc/openprom by "mount
215 -t openpromfs none /proc/openprom".
217 To compile the /proc/openprom support as a module, choose M here: the
218 module will be called openpromfs.
220 Only choose N if you know in advance that you will not need to modify
221 OpenPROM settings on the running system.
224 tristate "Sun4m LED driver"
226 This driver toggles the front-panel LED on sun4m systems
227 in a user-specifiable manner. Its state can be probed
228 by reading /proc/led and its blinking mode can be changed
229 via writes to /proc/led
231 source "fs/Kconfig.binfmt"
234 bool "SunOS binary emulation"
236 This allows you to run most SunOS binaries. If you want to do this,
237 say Y here and place appropriate files in /usr/gnemul/sunos. See
238 <http://www.ultralinux.org/faq.html> for more information. If you
239 want to run SunOS binaries on an Ultra you must also say Y to
240 "Kernel support for 32-bit a.out binaries" above.
248 source "drivers/Kconfig"
251 source "drivers/sbus/char/Kconfig"
254 # This one must be before the filesystem configs. -DaveM
256 menu "Unix98 PTY support"
259 bool "Unix98 PTY support"
261 A pseudo terminal (PTY) is a software device consisting of two
262 halves: a master and a slave. The slave device behaves identical to
263 a physical terminal; the master device is used by a process to
264 read data from and write data to the slave, thereby emulating a
265 terminal. Typical programs for the master side are telnet servers
268 Linux has traditionally used the BSD-like names /dev/ptyxx for
269 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
270 has a number of problems. The GNU C library glibc 2.1 and later,
271 however, supports the Unix98 naming standard: in order to acquire a
272 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
273 terminal is then made available to the process and the pseudo
274 terminal slave can be accessed as /dev/pts/<number>. What was
275 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
277 The entries in /dev/pts/ are created on the fly by a virtual
278 file system; therefore, if you say Y here you should say Y to
279 "/dev/pts file system for Unix98 PTYs" as well.
281 If you want to say Y here, you need to have the C library glibc 2.1
282 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
283 Read the instructions in <file:Documentation/Changes> pertaining to
284 pseudo terminals. It's safe to say N.
286 config UNIX98_PTY_COUNT
287 int "Maximum number of Unix98 PTYs in use (0-2048)"
288 depends on UNIX98_PTYS
291 The maximum number of Unix98 PTYs that can be used at any one time.
292 The default is 256, and should be enough for desktop systems. Server
293 machines which support incoming telnet/rlogin/ssh connections and/or
294 serve several X terminals may want to increase this: every incoming
295 connection and every xterm uses up one PTY.
297 When not in use, each additional set of 256 PTYs occupy
298 approximately 8 KB of kernel memory on 32-bit architectures.
304 menu "Instrumentation Support"
305 depends on EXPERIMENTAL
307 source "arch/sparc/oprofile/Kconfig"
311 source "arch/sparc/Kconfig.debug"
313 source "security/Kconfig"
315 source "crypto/Kconfig"