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