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
36 menu "General machine setup"
39 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
41 This enables support for systems with more than one CPU. If you have
42 a system with only one CPU, say N. If you have a system with more
45 If you say N here, the kernel will run on single and multiprocessor
46 machines, but will use only one CPU of a multiprocessor machine. If
47 you say Y here, the kernel will run on many, but not all,
48 singleprocessor machines. On a singleprocessor machine, the kernel
49 will run faster if you say N here.
51 People using multiprocessor machines who say Y here should also say
52 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
53 Management" code will be disabled if you say Y here.
55 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
56 available at <http://www.tldp.org/docs.html#howto>.
58 If you don't know what to do here, say N.
61 int "Maximum number of CPUs (2-32)"
72 # Identify this as a Sparc32 build
77 SPARC is a family of RISC microprocessors designed and marketed by
78 Sun Microsystems, incorporated. They are very widely found in Sun
79 workstations and clones. This port covers the original 32-bit SPARC;
80 it is old and stable and usually considered one of the "big three"
81 along with the Intel and Alpha ports. The UltraLinux project
82 maintains both the SPARC32 and SPARC64 ports; its web page is
83 available at <http://www.ultralinux.org/>.
85 # Global things across all Sun machines.
89 ISA is found on Espresso only and is not supported currently.
95 EISA is not supported.
101 MCA is not supported.
107 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
108 computer. These are credit-card size devices such as network cards,
109 modems or hard drives often used with laptops computers. There are
110 actually two varieties of these cards: the older 16 bit PCMCIA cards
111 and the newer 32 bit CardBus cards. If you want to use CardBus
112 cards, you need to say Y here and also to "CardBus support" below.
114 To use your PC-cards, you will need supporting software from David
115 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
116 for location). Please also read the PCMCIA-HOWTO, available from
117 <http://www.tldp.org/docs.html#howto>.
119 To compile this driver as modules, choose M here: the
120 modules will be called pcmcia_core and ds.
130 config SERIAL_CONSOLE
134 If you say Y here, it will be possible to use a serial port as the
135 system console (the system console is the device which receives all
136 kernel messages and warnings and which allows logins in single user
137 mode). This could be useful if some terminal or printer is connected
140 Even if you say Y here, the currently visible virtual console
141 (/dev/tty0) will still be used as the system console by default, but
142 you can alter that using a kernel command line option such as
143 "console=ttyS1". (Try "man bootparam" or see the documentation of
144 your boot loader (silo) about how to pass options to the kernel at
147 If you don't have a graphics card installed and you say Y here, the
148 kernel will automatically use the first serial line, /dev/ttyS0, as
161 config RWSEM_GENERIC_SPINLOCK
165 config RWSEM_XCHGADD_ALGORITHM
168 config GENERIC_FIND_NEXT_BIT
172 config GENERIC_HWEIGHT
176 config GENERIC_CALIBRATE_DELAY
180 config ARCH_MAY_HAVE_PC_FDC
184 config ARCH_HAS_ILOG2_U32
188 config ARCH_HAS_ILOG2_U64
192 config EMULATED_CMPXCHG
196 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
197 is emulated, and therefore it is not completely atomic.
203 Enable power management and CPU standby features on supported
207 bool "Support for SUN4 machines (disables SUN4[CDM] support)"
211 Say Y here if, and only if, your machine is a sun4. Note that
212 a kernel compiled with this option will run only on sun4.
213 (And the current version will probably work only on sun4/330.)
218 bool "Support for PCI and PS/2 keyboard/mouse"
220 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
221 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
222 All of these platforms are extremely obscure, so say N if unsure.
227 source "drivers/pci/Kconfig"
234 config SUN_OPENPROMFS
235 tristate "Openprom tree appears in /proc/openprom"
237 If you say Y, the OpenPROM device tree will be available as a
238 virtual file system, which you can mount to /proc/openprom by "mount
239 -t openpromfs none /proc/openprom".
241 To compile the /proc/openprom support as a module, choose M here: the
242 module will be called openpromfs.
244 Only choose N if you know in advance that you will not need to modify
245 OpenPROM settings on the running system.
248 tristate "Sun4m LED driver"
250 This driver toggles the front-panel LED on sun4m systems
251 in a user-specifiable manner. Its state can be probed
252 by reading /proc/led and its blinking mode can be changed
253 via writes to /proc/led
255 source "fs/Kconfig.binfmt"
263 source "drivers/Kconfig"
266 source "drivers/sbus/char/Kconfig"
269 # This one must be before the filesystem configs. -DaveM
271 menu "Unix98 PTY support"
274 bool "Unix98 PTY support"
276 A pseudo terminal (PTY) is a software device consisting of two
277 halves: a master and a slave. The slave device behaves identical to
278 a physical terminal; the master device is used by a process to
279 read data from and write data to the slave, thereby emulating a
280 terminal. Typical programs for the master side are telnet servers
283 Linux has traditionally used the BSD-like names /dev/ptyxx for
284 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
285 has a number of problems. The GNU C library glibc 2.1 and later,
286 however, supports the Unix98 naming standard: in order to acquire a
287 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
288 terminal is then made available to the process and the pseudo
289 terminal slave can be accessed as /dev/pts/<number>. What was
290 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
292 The entries in /dev/pts/ are created on the fly by a virtual
293 file system; therefore, if you say Y here you should say Y to
294 "/dev/pts file system for Unix98 PTYs" as well.
296 If you want to say Y here, you need to have the C library glibc 2.1
297 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
298 Read the instructions in <file:Documentation/Changes> pertaining to
299 pseudo terminals. It's safe to say N.
301 config UNIX98_PTY_COUNT
302 int "Maximum number of Unix98 PTYs in use (0-2048)"
303 depends on UNIX98_PTYS
306 The maximum number of Unix98 PTYs that can be used at any one time.
307 The default is 256, and should be enough for desktop systems. Server
308 machines which support incoming telnet/rlogin/ssh connections and/or
309 serve several X terminals may want to increase this: every incoming
310 connection and every xterm uses up one PTY.
312 When not in use, each additional set of 256 PTYs occupy
313 approximately 8 KB of kernel memory on 32-bit architectures.
319 source "arch/sparc/Kconfig.debug"
321 source "security/Kconfig"
323 source "crypto/Kconfig"