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 the <file:Documentation/smp.txt>,
52 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
53 <http://www.tldp.org/docs.html#howto>.
55 If you don't know what to do here, say N.
58 int "Maximum number of CPUs (2-32)"
67 # Identify this as a Sparc32 build
72 SPARC is a family of RISC microprocessors designed and marketed by
73 Sun Microsystems, incorporated. They are very widely found in Sun
74 workstations and clones. This port covers the original 32-bit SPARC;
75 it is old and stable and usually considered one of the "big three"
76 along with the Intel and Alpha ports. The UltraLinux project
77 maintains both the SPARC32 and SPARC64 ports; its web page is
78 available at <http://www.ultralinux.org/>.
80 # Global things across all Sun machines.
84 ISA is found on Espresso only and is not supported currently.
90 EISA is not supported.
102 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
103 computer. These are credit-card size devices such as network cards,
104 modems or hard drives often used with laptops computers. There are
105 actually two varieties of these cards: the older 16 bit PCMCIA cards
106 and the newer 32 bit CardBus cards. If you want to use CardBus
107 cards, you need to say Y here and also to "CardBus support" below.
109 To use your PC-cards, you will need supporting software from David
110 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
111 for location). Please also read the PCMCIA-HOWTO, available from
112 <http://www.tldp.org/docs.html#howto>.
114 To compile this driver as modules, choose M here: the
115 modules will be called pcmcia_core and ds.
125 config SERIAL_CONSOLE
129 If you say Y here, it will be possible to use a serial port as the
130 system console (the system console is the device which receives all
131 kernel messages and warnings and which allows logins in single user
132 mode). This could be useful if some terminal or printer is connected
135 Even if you say Y here, the currently visible virtual console
136 (/dev/tty0) will still be used as the system console by default, but
137 you can alter that using a kernel command line option such as
138 "console=ttyS1". (Try "man bootparam" or see the documentation of
139 your boot loader (silo) about how to pass options to the kernel at
142 If you don't have a graphics card installed and you say Y here, the
143 kernel will automatically use the first serial line, /dev/ttyS0, as
156 config RWSEM_GENERIC_SPINLOCK
160 config RWSEM_XCHGADD_ALGORITHM
163 config GENERIC_FIND_NEXT_BIT
167 config GENERIC_HWEIGHT
171 config GENERIC_CALIBRATE_DELAY
175 config ARCH_MAY_HAVE_PC_FDC
179 config ARCH_HAS_ILOG2_U32
183 config ARCH_HAS_ILOG2_U64
187 config EMULATED_CMPXCHG
191 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
192 is emulated, and therefore it is not completely atomic.
198 Enable power management and CPU standby features on supported
202 bool "Support for SUN4 machines (disables SUN4[CDM] support)"
206 Say Y here if, and only if, your machine is a sun4. Note that
207 a kernel compiled with this option will run only on sun4.
208 (And the current version will probably work only on sun4/330.)
213 bool "Support for PCI and PS/2 keyboard/mouse"
215 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
216 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
217 All of these platforms are extremely obscure, so say N if unsure.
222 source "drivers/pci/Kconfig"
229 config SUN_OPENPROMFS
230 tristate "Openprom tree appears in /proc/openprom"
232 If you say Y, the OpenPROM device tree will be available as a
233 virtual file system, which you can mount to /proc/openprom by "mount
234 -t openpromfs none /proc/openprom".
236 To compile the /proc/openprom support as a module, choose M here: the
237 module will be called openpromfs.
239 Only choose N if you know in advance that you will not need to modify
240 OpenPROM settings on the running system.
243 tristate "Sun4m LED driver"
245 This driver toggles the front-panel LED on sun4m systems
246 in a user-specifiable manner. Its state can be probed
247 by reading /proc/led and its blinking mode can be changed
248 via writes to /proc/led
250 source "fs/Kconfig.binfmt"
253 bool "SunOS binary emulation"
255 This allows you to run most SunOS binaries. If you want to do this,
256 say Y here and place appropriate files in /usr/gnemul/sunos. See
257 <http://www.ultralinux.org/faq.html> for more information. If you
258 want to run SunOS binaries on an Ultra you must also say Y to
259 "Kernel support for 32-bit a.out binaries" above.
267 source "drivers/Kconfig"
270 source "drivers/sbus/char/Kconfig"
273 # This one must be before the filesystem configs. -DaveM
275 menu "Unix98 PTY support"
278 bool "Unix98 PTY support"
280 A pseudo terminal (PTY) is a software device consisting of two
281 halves: a master and a slave. The slave device behaves identical to
282 a physical terminal; the master device is used by a process to
283 read data from and write data to the slave, thereby emulating a
284 terminal. Typical programs for the master side are telnet servers
287 Linux has traditionally used the BSD-like names /dev/ptyxx for
288 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
289 has a number of problems. The GNU C library glibc 2.1 and later,
290 however, supports the Unix98 naming standard: in order to acquire a
291 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
292 terminal is then made available to the process and the pseudo
293 terminal slave can be accessed as /dev/pts/<number>. What was
294 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
296 The entries in /dev/pts/ are created on the fly by a virtual
297 file system; therefore, if you say Y here you should say Y to
298 "/dev/pts file system for Unix98 PTYs" as well.
300 If you want to say Y here, you need to have the C library glibc 2.1
301 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
302 Read the instructions in <file:Documentation/Changes> pertaining to
303 pseudo terminals. It's safe to say N.
305 config UNIX98_PTY_COUNT
306 int "Maximum number of Unix98 PTYs in use (0-2048)"
307 depends on UNIX98_PTYS
310 The maximum number of Unix98 PTYs that can be used at any one time.
311 The default is 256, and should be enough for desktop systems. Server
312 machines which support incoming telnet/rlogin/ssh connections and/or
313 serve several X terminals may want to increase this: every incoming
314 connection and every xterm uses up one PTY.
316 When not in use, each additional set of 256 PTYs occupy
317 approximately 8 KB of kernel memory on 32-bit architectures.
323 source "kernel/Kconfig.instrumentation"
325 source "arch/sparc/Kconfig.debug"
327 source "security/Kconfig"
329 source "crypto/Kconfig"