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