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)"
71 select HAVE_ARCH_KGDB if !SMP
73 # Identify this as a Sparc32 build
78 SPARC is a family of RISC microprocessors designed and marketed by
79 Sun Microsystems, incorporated. They are very widely found in Sun
80 workstations and clones. This port covers the original 32-bit SPARC;
81 it is old and stable and usually considered one of the "big three"
82 along with the Intel and Alpha ports. The UltraLinux project
83 maintains both the SPARC32 and SPARC64 ports; its web page is
84 available at <http://www.ultralinux.org/>.
86 # Global things across all Sun machines.
90 ISA is found on Espresso only and is not supported currently.
96 EISA is not supported.
102 MCA is not supported.
108 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
109 computer. These are credit-card size devices such as network cards,
110 modems or hard drives often used with laptops computers. There are
111 actually two varieties of these cards: the older 16 bit PCMCIA cards
112 and the newer 32 bit CardBus cards. If you want to use CardBus
113 cards, you need to say Y here and also to "CardBus support" below.
115 To use your PC-cards, you will need supporting software from David
116 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
117 for location). Please also read the PCMCIA-HOWTO, available from
118 <http://www.tldp.org/docs.html#howto>.
120 To compile this driver as modules, choose M here: the
121 modules will be called pcmcia_core and ds.
131 config SERIAL_CONSOLE
135 If you say Y here, it will be possible to use a serial port as the
136 system console (the system console is the device which receives all
137 kernel messages and warnings and which allows logins in single user
138 mode). This could be useful if some terminal or printer is connected
141 Even if you say Y here, the currently visible virtual console
142 (/dev/tty0) will still be used as the system console by default, but
143 you can alter that using a kernel command line option such as
144 "console=ttyS1". (Try "man bootparam" or see the documentation of
145 your boot loader (silo) about how to pass options to the kernel at
148 If you don't have a graphics card installed and you say Y here, the
149 kernel will automatically use the first serial line, /dev/ttyS0, as
162 config RWSEM_GENERIC_SPINLOCK
166 config RWSEM_XCHGADD_ALGORITHM
169 config GENERIC_FIND_NEXT_BIT
173 config GENERIC_HWEIGHT
177 config GENERIC_CALIBRATE_DELAY
181 config ARCH_MAY_HAVE_PC_FDC
185 config ARCH_HAS_ILOG2_U32
189 config ARCH_HAS_ILOG2_U64
193 config EMULATED_CMPXCHG
197 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
198 is emulated, and therefore it is not completely atomic.
204 Enable power management and CPU standby features on supported
208 bool "Support for SUN4 machines (disables SUN4[CDM] support)"
212 Say Y here if, and only if, your machine is a sun4. Note that
213 a kernel compiled with this option will run only on sun4.
214 (And the current version will probably work only on sun4/330.)
219 bool "Support for PCI and PS/2 keyboard/mouse"
221 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
222 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
223 All of these platforms are extremely obscure, so say N if unsure.
228 source "drivers/pci/Kconfig"
235 config SUN_OPENPROMFS
236 tristate "Openprom tree appears in /proc/openprom"
238 If you say Y, the OpenPROM device tree will be available as a
239 virtual file system, which you can mount to /proc/openprom by "mount
240 -t openpromfs none /proc/openprom".
242 To compile the /proc/openprom support as a module, choose M here: the
243 module will be called openpromfs.
245 Only choose N if you know in advance that you will not need to modify
246 OpenPROM settings on the running system.
249 tristate "Sun4m LED driver"
251 This driver toggles the front-panel LED on sun4m systems
252 in a user-specifiable manner. Its state can be probed
253 by reading /proc/led and its blinking mode can be changed
254 via writes to /proc/led
256 source "fs/Kconfig.binfmt"
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 source "arch/sparc/Kconfig.debug"
322 source "security/Kconfig"
324 source "crypto/Kconfig"