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