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
24 config ARCH_NO_VIRT_TO_BUS
32 menu "General machine setup"
35 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
37 This enables support for systems with more than one CPU. If you have
38 a system with only one CPU, say N. If you have a system with more
41 If you say N here, the kernel will run on single and multiprocessor
42 machines, but will use only one CPU of a multiprocessor machine. If
43 you say Y here, the kernel will run on many, but not all,
44 singleprocessor machines. On a singleprocessor machine, the kernel
45 will run faster if you say N here.
47 People using multiprocessor machines who say Y here should also say
48 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
49 Management" code will be disabled if you say Y here.
51 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
52 available at <http://www.tldp.org/docs.html#howto>.
54 If you don't know what to do here, say N.
57 int "Maximum number of CPUs (2-32)"
66 # Identify this as a Sparc32 build
71 SPARC is a family of RISC microprocessors designed and marketed by
72 Sun Microsystems, incorporated. They are very widely found in Sun
73 workstations and clones. This port covers the original 32-bit SPARC;
74 it is old and stable and usually considered one of the "big three"
75 along with the Intel and Alpha ports. The UltraLinux project
76 maintains both the SPARC32 and SPARC64 ports; its web page is
77 available at <http://www.ultralinux.org/>.
79 # Global things across all Sun machines.
83 ISA is found on Espresso only and is not supported currently.
89 EISA is not supported.
101 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
102 computer. These are credit-card size devices such as network cards,
103 modems or hard drives often used with laptops computers. There are
104 actually two varieties of these cards: the older 16 bit PCMCIA cards
105 and the newer 32 bit CardBus cards. If you want to use CardBus
106 cards, you need to say Y here and also to "CardBus support" below.
108 To use your PC-cards, you will need supporting software from David
109 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
110 for location). Please also read the PCMCIA-HOWTO, available from
111 <http://www.tldp.org/docs.html#howto>.
113 To compile this driver as modules, choose M here: the
114 modules will be called pcmcia_core and ds.
124 config SERIAL_CONSOLE
128 If you say Y here, it will be possible to use a serial port as the
129 system console (the system console is the device which receives all
130 kernel messages and warnings and which allows logins in single user
131 mode). This could be useful if some terminal or printer is connected
134 Even if you say Y here, the currently visible virtual console
135 (/dev/tty0) will still be used as the system console by default, but
136 you can alter that using a kernel command line option such as
137 "console=ttyS1". (Try "man bootparam" or see the documentation of
138 your boot loader (silo) about how to pass options to the kernel at
141 If you don't have a graphics card installed and you say Y here, the
142 kernel will automatically use the first serial line, /dev/ttyS0, as
155 config RWSEM_GENERIC_SPINLOCK
159 config RWSEM_XCHGADD_ALGORITHM
162 config GENERIC_FIND_NEXT_BIT
166 config GENERIC_HWEIGHT
170 config GENERIC_CALIBRATE_DELAY
174 config ARCH_MAY_HAVE_PC_FDC
178 config ARCH_HAS_ILOG2_U32
182 config ARCH_HAS_ILOG2_U64
186 config EMULATED_CMPXCHG
190 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
191 is emulated, and therefore it is not completely atomic.
197 Enable power management and CPU standby features on supported
201 bool "Support for SUN4 machines (disables SUN4[CDM] support)"
205 Say Y here if, and only if, your machine is a sun4. Note that
206 a kernel compiled with this option will run only on sun4.
207 (And the current version will probably work only on sun4/330.)
212 bool "Support for PCI and PS/2 keyboard/mouse"
214 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
215 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
216 All of these platforms are extremely obscure, so say N if unsure.
221 source "drivers/pci/Kconfig"
228 config SUN_OPENPROMFS
229 tristate "Openprom tree appears in /proc/openprom"
231 If you say Y, the OpenPROM device tree will be available as a
232 virtual file system, which you can mount to /proc/openprom by "mount
233 -t openpromfs none /proc/openprom".
235 To compile the /proc/openprom support as a module, choose M here: the
236 module will be called openpromfs.
238 Only choose N if you know in advance that you will not need to modify
239 OpenPROM settings on the running system.
242 tristate "Sun4m LED driver"
244 This driver toggles the front-panel LED on sun4m systems
245 in a user-specifiable manner. Its state can be probed
246 by reading /proc/led and its blinking mode can be changed
247 via writes to /proc/led
249 source "fs/Kconfig.binfmt"
252 bool "SunOS binary emulation"
254 This allows you to run most SunOS binaries. If you want to do this,
255 say Y here and place appropriate files in /usr/gnemul/sunos. See
256 <http://www.ultralinux.org/faq.html> for more information. If you
257 want to run SunOS binaries on an Ultra you must also say Y to
258 "Kernel support for 32-bit a.out binaries" above.
266 source "drivers/Kconfig"
269 source "drivers/sbus/char/Kconfig"
272 # This one must be before the filesystem configs. -DaveM
274 menu "Unix98 PTY support"
277 bool "Unix98 PTY support"
279 A pseudo terminal (PTY) is a software device consisting of two
280 halves: a master and a slave. The slave device behaves identical to
281 a physical terminal; the master device is used by a process to
282 read data from and write data to the slave, thereby emulating a
283 terminal. Typical programs for the master side are telnet servers
286 Linux has traditionally used the BSD-like names /dev/ptyxx for
287 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
288 has a number of problems. The GNU C library glibc 2.1 and later,
289 however, supports the Unix98 naming standard: in order to acquire a
290 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
291 terminal is then made available to the process and the pseudo
292 terminal slave can be accessed as /dev/pts/<number>. What was
293 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
295 The entries in /dev/pts/ are created on the fly by a virtual
296 file system; therefore, if you say Y here you should say Y to
297 "/dev/pts file system for Unix98 PTYs" as well.
299 If you want to say Y here, you need to have the C library glibc 2.1
300 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
301 Read the instructions in <file:Documentation/Changes> pertaining to
302 pseudo terminals. It's safe to say N.
304 config UNIX98_PTY_COUNT
305 int "Maximum number of Unix98 PTYs in use (0-2048)"
306 depends on UNIX98_PTYS
309 The maximum number of Unix98 PTYs that can be used at any one time.
310 The default is 256, and should be enough for desktop systems. Server
311 machines which support incoming telnet/rlogin/ssh connections and/or
312 serve several X terminals may want to increase this: every incoming
313 connection and every xterm uses up one PTY.
315 When not in use, each additional set of 256 PTYs occupy
316 approximately 8 KB of kernel memory on 32-bit architectures.
322 source "kernel/Kconfig.instrumentation"
324 source "arch/sparc/Kconfig.debug"
326 source "security/Kconfig"
328 source "crypto/Kconfig"