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