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