xref: /openbmc/linux/arch/sparc/Kconfig (revision 4f3865fb) 
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.
4#
5
6mainmenu "Linux/SPARC Kernel Configuration"
7
8config MMU
9	bool
10	default y
11
12config HIGHMEM
13	bool
14	default y
15
16config GENERIC_ISA_DMA
17	bool
18	default y
19
20source "init/Kconfig"
21
22menu "General machine setup"
23
24config SMP
25	bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
26	---help---
27	  This enables support for systems with more than one CPU. If you have
28	  a system with only one CPU, say N. If you have a system with more
29	  than one CPU, say Y.
30
31	  If you say N here, the kernel will run on single and multiprocessor
32	  machines, but will use only one CPU of a multiprocessor machine. If
33	  you say Y here, the kernel will run on many, but not all,
34	  singleprocessor machines. On a singleprocessor machine, the kernel
35	  will run faster if you say N here.
36
37	  People using multiprocessor machines who say Y here should also say
38	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
39	  Management" code will be disabled if you say Y here.
40
41	  See also the <file:Documentation/smp.txt>,
42	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
43	  <http://www.tldp.org/docs.html#howto>.
44
45	  If you don't know what to do here, say N.
46
47config NR_CPUS
48	int "Maximum number of CPUs (2-32)"
49	range 2 32
50	depends on SMP
51	default "32"
52
53config SPARC
54	bool
55	default y
56
57# Identify this as a Sparc32 build
58config SPARC32
59	bool
60	default y
61	help
62	  SPARC is a family of RISC microprocessors designed and marketed by
63	  Sun Microsystems, incorporated.  They are very widely found in Sun
64	  workstations and clones. This port covers the original 32-bit SPARC;
65	  it is old and stable and usually considered one of the "big three"
66	  along with the Intel and Alpha ports.  The UltraLinux project
67	  maintains both the SPARC32 and SPARC64 ports; its web page is
68	  available at <http://www.ultralinux.org/>.
69
70# Global things across all Sun machines.
71config ISA
72	bool
73	help
74	  ISA is found on Espresso only and is not supported currently.
75	  Say N
76
77config EISA
78	bool
79	help
80	  EISA is not supported.
81	  Say N
82
83config MCA
84	bool
85	help
86	  MCA is not supported.
87	  Say N
88
89config PCMCIA
90	tristate
91	---help---
92	  Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
93	  computer.  These are credit-card size devices such as network cards,
94	  modems or hard drives often used with laptops computers.  There are
95	  actually two varieties of these cards: the older 16 bit PCMCIA cards
96	  and the newer 32 bit CardBus cards.  If you want to use CardBus
97	  cards, you need to say Y here and also to "CardBus support" below.
98
99	  To use your PC-cards, you will need supporting software from David
100	  Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
101	  for location).  Please also read the PCMCIA-HOWTO, available from
102	  <http://www.tldp.org/docs.html#howto>.
103
104	  To compile this driver as modules, choose M here: the
105	  modules will be called pcmcia_core and ds.
106
107config SBUS
108	bool
109	default y
110
111config SBUSCHAR
112	bool
113	default y
114
115config SERIAL_CONSOLE
116	bool
117	default y
118	---help---
119	  If you say Y here, it will be possible to use a serial port as the
120	  system console (the system console is the device which receives all
121	  kernel messages and warnings and which allows logins in single user
122	  mode). This could be useful if some terminal or printer is connected
123	  to that serial port.
124
125	  Even if you say Y here, the currently visible virtual console
126	  (/dev/tty0) will still be used as the system console by default, but
127	  you can alter that using a kernel command line option such as
128	  "console=ttyS1". (Try "man bootparam" or see the documentation of
129	  your boot loader (silo) about how to pass options to the kernel at
130	  boot time.)
131
132	  If you don't have a graphics card installed and you say Y here, the
133	  kernel will automatically use the first serial line, /dev/ttyS0, as
134	  system console.
135
136	  If unsure, say N.
137
138config SUN_AUXIO
139	bool
140	default y
141
142config SUN_IO
143	bool
144	default y
145
146config RWSEM_GENERIC_SPINLOCK
147	bool
148	default y
149
150config RWSEM_XCHGADD_ALGORITHM
151	bool
152
153config GENERIC_FIND_NEXT_BIT
154	bool
155	default y
156
157config GENERIC_HWEIGHT
158	bool
159	default y
160
161config GENERIC_CALIBRATE_DELAY
162	bool
163	default y
164
165config ARCH_MAY_HAVE_PC_FDC
166	bool
167	default y
168
169config SUN_PM
170	bool
171	default y
172	help
173	  Enable power management and CPU standby features on supported
174	  SPARC platforms.
175
176config SUN4
177	bool "Support for SUN4 machines (disables SUN4[CDM] support)"
178	depends on !SMP
179	default n
180	help
181	  Say Y here if, and only if, your machine is a sun4. Note that
182	  a kernel compiled with this option will run only on sun4.
183	  (And the current version will probably work only on sun4/330.)
184
185if !SUN4
186
187config PCI
188	bool "Support for PCI and PS/2 keyboard/mouse"
189	help
190	  CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
191	  CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
192	  All of these platforms are extremely obscure, so say N if unsure.
193
194source "drivers/pci/Kconfig"
195
196endif
197
198config SUN_OPENPROMFS
199	tristate "Openprom tree appears in /proc/openprom"
200	help
201	  If you say Y, the OpenPROM device tree will be available as a
202	  virtual file system, which you can mount to /proc/openprom by "mount
203	  -t openpromfs none /proc/openprom".
204
205	  To compile the /proc/openprom support as a module, choose M here: the
206	  module will be called openpromfs.
207
208	  Only choose N if you know in advance that you will not need to modify
209	  OpenPROM settings on the running system.
210
211config SPARC_LED
212	tristate "Sun4m LED driver"
213	help
214	  This driver toggles the front-panel LED on sun4m systems
215	  in a user-specifyable manner.  It's state can be probed
216	  by reading /proc/led and it's blinking mode can be changed
217	  via writes to /proc/led
218
219source "fs/Kconfig.binfmt"
220
221config SUNOS_EMUL
222	bool "SunOS binary emulation"
223	help
224	  This allows you to run most SunOS binaries.  If you want to do this,
225	  say Y here and place appropriate files in /usr/gnemul/sunos. See
226	  <http://www.ultralinux.org/faq.html> for more information.  If you
227	  want to run SunOS binaries on an Ultra you must also say Y to
228	  "Kernel support for 32-bit a.out binaries" above.
229
230source "mm/Kconfig"
231
232endmenu
233
234source "net/Kconfig"
235
236source "drivers/Kconfig"
237
238if !SUN4
239source "drivers/sbus/char/Kconfig"
240endif
241
242# This one must be before the filesystem configs. -DaveM
243
244menu "Unix98 PTY support"
245
246config UNIX98_PTYS
247	bool "Unix98 PTY support"
248	---help---
249	  A pseudo terminal (PTY) is a software device consisting of two
250	  halves: a master and a slave. The slave device behaves identical to
251	  a physical terminal; the master device is used by a process to
252	  read data from and write data to the slave, thereby emulating a
253	  terminal. Typical programs for the master side are telnet servers
254	  and xterms.
255
256	  Linux has traditionally used the BSD-like names /dev/ptyxx for
257	  masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
258	  has a number of problems. The GNU C library glibc 2.1 and later,
259	  however, supports the Unix98 naming standard: in order to acquire a
260	  pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
261	  terminal is then made available to the process and the pseudo
262	  terminal slave can be accessed as /dev/pts/<number>. What was
263	  traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
264
265	  The entries in /dev/pts/ are created on the fly by a virtual
266	  file system; therefore, if you say Y here you should say Y to
267	  "/dev/pts file system for Unix98 PTYs" as well.
268
269	  If you want to say Y here, you need to have the C library glibc 2.1
270	  or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
271	  Read the instructions in <file:Documentation/Changes> pertaining to
272	  pseudo terminals. It's safe to say N.
273
274config UNIX98_PTY_COUNT
275	int "Maximum number of Unix98 PTYs in use (0-2048)"
276	depends on UNIX98_PTYS
277	default "256"
278	help
279	  The maximum number of Unix98 PTYs that can be used at any one time.
280	  The default is 256, and should be enough for desktop systems. Server
281	  machines which support incoming telnet/rlogin/ssh connections and/or
282	  serve several X terminals may want to increase this: every incoming
283	  connection and every xterm uses up one PTY.
284
285	  When not in use, each additional set of 256 PTYs occupy
286	  approximately 8 KB of kernel memory on 32-bit architectures.
287
288endmenu
289
290source "fs/Kconfig"
291
292source "arch/sparc/Kconfig.debug"
293
294source "security/Kconfig"
295
296source "crypto/Kconfig"
297
298source "lib/Kconfig"
299