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
181 config EMULATED_CMPXCHG
185 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
186 is emulated, and therefore it is not completely atomic.
192 Enable power management and CPU standby features on supported
196 bool "Support for SUN4 machines (disables SUN4[CDM] support)"
200 Say Y here if, and only if, your machine is a sun4. Note that
201 a kernel compiled with this option will run only on sun4.
202 (And the current version will probably work only on sun4/330.)
207 bool "Support for PCI and PS/2 keyboard/mouse"
209 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
210 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
211 All of these platforms are extremely obscure, so say N if unsure.
213 source "drivers/pci/Kconfig"
217 config SUN_OPENPROMFS
218 tristate "Openprom tree appears in /proc/openprom"
220 If you say Y, the OpenPROM device tree will be available as a
221 virtual file system, which you can mount to /proc/openprom by "mount
222 -t openpromfs none /proc/openprom".
224 To compile the /proc/openprom support as a module, choose M here: the
225 module will be called openpromfs.
227 Only choose N if you know in advance that you will not need to modify
228 OpenPROM settings on the running system.
231 tristate "Sun4m LED driver"
233 This driver toggles the front-panel LED on sun4m systems
234 in a user-specifiable manner. Its state can be probed
235 by reading /proc/led and its blinking mode can be changed
236 via writes to /proc/led
238 source "fs/Kconfig.binfmt"
241 bool "SunOS binary emulation"
243 This allows you to run most SunOS binaries. If you want to do this,
244 say Y here and place appropriate files in /usr/gnemul/sunos. See
245 <http://www.ultralinux.org/faq.html> for more information. If you
246 want to run SunOS binaries on an Ultra you must also say Y to
247 "Kernel support for 32-bit a.out binaries" above.
255 source "drivers/Kconfig"
258 source "drivers/sbus/char/Kconfig"
261 # This one must be before the filesystem configs. -DaveM
263 menu "Unix98 PTY support"
266 bool "Unix98 PTY support"
268 A pseudo terminal (PTY) is a software device consisting of two
269 halves: a master and a slave. The slave device behaves identical to
270 a physical terminal; the master device is used by a process to
271 read data from and write data to the slave, thereby emulating a
272 terminal. Typical programs for the master side are telnet servers
275 Linux has traditionally used the BSD-like names /dev/ptyxx for
276 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
277 has a number of problems. The GNU C library glibc 2.1 and later,
278 however, supports the Unix98 naming standard: in order to acquire a
279 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
280 terminal is then made available to the process and the pseudo
281 terminal slave can be accessed as /dev/pts/<number>. What was
282 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
284 The entries in /dev/pts/ are created on the fly by a virtual
285 file system; therefore, if you say Y here you should say Y to
286 "/dev/pts file system for Unix98 PTYs" as well.
288 If you want to say Y here, you need to have the C library glibc 2.1
289 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
290 Read the instructions in <file:Documentation/Changes> pertaining to
291 pseudo terminals. It's safe to say N.
293 config UNIX98_PTY_COUNT
294 int "Maximum number of Unix98 PTYs in use (0-2048)"
295 depends on UNIX98_PTYS
298 The maximum number of Unix98 PTYs that can be used at any one time.
299 The default is 256, and should be enough for desktop systems. Server
300 machines which support incoming telnet/rlogin/ssh connections and/or
301 serve several X terminals may want to increase this: every incoming
302 connection and every xterm uses up one PTY.
304 When not in use, each additional set of 256 PTYs occupy
305 approximately 8 KB of kernel memory on 32-bit architectures.
311 menu "Instrumentation Support"
312 depends on EXPERIMENTAL
314 source "arch/sparc/oprofile/Kconfig"
318 source "arch/sparc/Kconfig.debug"
320 source "security/Kconfig"
322 source "crypto/Kconfig"