xref: /openbmc/linux/arch/sparc/Kconfig (revision e868d61272caa648214046a096e5a6bfc068dc8c)
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 ZONE_DMA
17	bool
18	default y
19
20config GENERIC_ISA_DMA
21	bool
22	default y
23
24source "init/Kconfig"
25
26menu "General machine setup"
27
28config SMP
29	bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
30	---help---
31	  This enables support for systems with more than one CPU. If you have
32	  a system with only one CPU, say N. If you have a system with more
33	  than one CPU, say Y.
34
35	  If you say N here, the kernel will run on single and multiprocessor
36	  machines, but will use only one CPU of a multiprocessor machine. If
37	  you say Y here, the kernel will run on many, but not all,
38	  singleprocessor machines. On a singleprocessor machine, the kernel
39	  will run faster if you say N here.
40
41	  People using multiprocessor machines who say Y here should also say
42	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
43	  Management" code will be disabled if you say Y here.
44
45	  See also the <file:Documentation/smp.txt>,
46	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
47	  <http://www.tldp.org/docs.html#howto>.
48
49	  If you don't know what to do here, say N.
50
51config NR_CPUS
52	int "Maximum number of CPUs (2-32)"
53	range 2 32
54	depends on SMP
55	default "32"
56
57config SPARC
58	bool
59	default y
60
61# Identify this as a Sparc32 build
62config SPARC32
63	bool
64	default y
65	help
66	  SPARC is a family of RISC microprocessors designed and marketed by
67	  Sun Microsystems, incorporated.  They are very widely found in Sun
68	  workstations and clones. This port covers the original 32-bit SPARC;
69	  it is old and stable and usually considered one of the "big three"
70	  along with the Intel and Alpha ports.  The UltraLinux project
71	  maintains both the SPARC32 and SPARC64 ports; its web page is
72	  available at <http://www.ultralinux.org/>.
73
74# Global things across all Sun machines.
75config ISA
76	bool
77	help
78	  ISA is found on Espresso only and is not supported currently.
79	  Say N
80
81config EISA
82	bool
83	help
84	  EISA is not supported.
85	  Say N
86
87config MCA
88	bool
89	help
90	  MCA is not supported.
91	  Say N
92
93config PCMCIA
94	tristate
95	---help---
96	  Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
97	  computer.  These are credit-card size devices such as network cards,
98	  modems or hard drives often used with laptops computers.  There are
99	  actually two varieties of these cards: the older 16 bit PCMCIA cards
100	  and the newer 32 bit CardBus cards.  If you want to use CardBus
101	  cards, you need to say Y here and also to "CardBus support" below.
102
103	  To use your PC-cards, you will need supporting software from David
104	  Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
105	  for location).  Please also read the PCMCIA-HOWTO, available from
106	  <http://www.tldp.org/docs.html#howto>.
107
108	  To compile this driver as modules, choose M here: the
109	  modules will be called pcmcia_core and ds.
110
111config SBUS
112	bool
113	default y
114
115config SBUSCHAR
116	bool
117	default y
118
119config SERIAL_CONSOLE
120	bool
121	default y
122	---help---
123	  If you say Y here, it will be possible to use a serial port as the
124	  system console (the system console is the device which receives all
125	  kernel messages and warnings and which allows logins in single user
126	  mode). This could be useful if some terminal or printer is connected
127	  to that serial port.
128
129	  Even if you say Y here, the currently visible virtual console
130	  (/dev/tty0) will still be used as the system console by default, but
131	  you can alter that using a kernel command line option such as
132	  "console=ttyS1". (Try "man bootparam" or see the documentation of
133	  your boot loader (silo) about how to pass options to the kernel at
134	  boot time.)
135
136	  If you don't have a graphics card installed and you say Y here, the
137	  kernel will automatically use the first serial line, /dev/ttyS0, as
138	  system console.
139
140	  If unsure, say N.
141
142config SUN_AUXIO
143	bool
144	default y
145
146config SUN_IO
147	bool
148	default y
149
150config RWSEM_GENERIC_SPINLOCK
151	bool
152	default y
153
154config RWSEM_XCHGADD_ALGORITHM
155	bool
156
157config GENERIC_FIND_NEXT_BIT
158	bool
159	default y
160
161config GENERIC_HWEIGHT
162	bool
163	default y
164
165config GENERIC_CALIBRATE_DELAY
166	bool
167	default y
168
169config ARCH_MAY_HAVE_PC_FDC
170	bool
171	default y
172
173config ARCH_HAS_ILOG2_U32
174	bool
175	default n
176
177config ARCH_HAS_ILOG2_U64
178	bool
179	default n
180
181config SUN_PM
182	bool
183	default y
184	help
185	  Enable power management and CPU standby features on supported
186	  SPARC platforms.
187
188config SUN4
189	bool "Support for SUN4 machines (disables SUN4[CDM] support)"
190	depends on !SMP
191	default n
192	help
193	  Say Y here if, and only if, your machine is a sun4. Note that
194	  a kernel compiled with this option will run only on sun4.
195	  (And the current version will probably work only on sun4/330.)
196
197if !SUN4
198
199config PCI
200	bool "Support for PCI and PS/2 keyboard/mouse"
201	help
202	  CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
203	  CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
204	  All of these platforms are extremely obscure, so say N if unsure.
205
206source "drivers/pci/Kconfig"
207
208endif
209
210config SUN_OPENPROMFS
211	tristate "Openprom tree appears in /proc/openprom"
212	help
213	  If you say Y, the OpenPROM device tree will be available as a
214	  virtual file system, which you can mount to /proc/openprom by "mount
215	  -t openpromfs none /proc/openprom".
216
217	  To compile the /proc/openprom support as a module, choose M here: the
218	  module will be called openpromfs.
219
220	  Only choose N if you know in advance that you will not need to modify
221	  OpenPROM settings on the running system.
222
223config SPARC_LED
224	tristate "Sun4m LED driver"
225	help
226	  This driver toggles the front-panel LED on sun4m systems
227	  in a user-specifiable manner.  Its state can be probed
228	  by reading /proc/led and its blinking mode can be changed
229	  via writes to /proc/led
230
231source "fs/Kconfig.binfmt"
232
233config SUNOS_EMUL
234	bool "SunOS binary emulation"
235	help
236	  This allows you to run most SunOS binaries.  If you want to do this,
237	  say Y here and place appropriate files in /usr/gnemul/sunos. See
238	  <http://www.ultralinux.org/faq.html> for more information.  If you
239	  want to run SunOS binaries on an Ultra you must also say Y to
240	  "Kernel support for 32-bit a.out binaries" above.
241
242source "mm/Kconfig"
243
244endmenu
245
246source "net/Kconfig"
247
248source "drivers/Kconfig"
249
250if !SUN4
251source "drivers/sbus/char/Kconfig"
252endif
253
254# This one must be before the filesystem configs. -DaveM
255
256menu "Unix98 PTY support"
257
258config UNIX98_PTYS
259	bool "Unix98 PTY support"
260	---help---
261	  A pseudo terminal (PTY) is a software device consisting of two
262	  halves: a master and a slave. The slave device behaves identical to
263	  a physical terminal; the master device is used by a process to
264	  read data from and write data to the slave, thereby emulating a
265	  terminal. Typical programs for the master side are telnet servers
266	  and xterms.
267
268	  Linux has traditionally used the BSD-like names /dev/ptyxx for
269	  masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
270	  has a number of problems. The GNU C library glibc 2.1 and later,
271	  however, supports the Unix98 naming standard: in order to acquire a
272	  pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
273	  terminal is then made available to the process and the pseudo
274	  terminal slave can be accessed as /dev/pts/<number>. What was
275	  traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
276
277	  The entries in /dev/pts/ are created on the fly by a virtual
278	  file system; therefore, if you say Y here you should say Y to
279	  "/dev/pts file system for Unix98 PTYs" as well.
280
281	  If you want to say Y here, you need to have the C library glibc 2.1
282	  or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
283	  Read the instructions in <file:Documentation/Changes> pertaining to
284	  pseudo terminals. It's safe to say N.
285
286config UNIX98_PTY_COUNT
287	int "Maximum number of Unix98 PTYs in use (0-2048)"
288	depends on UNIX98_PTYS
289	default "256"
290	help
291	  The maximum number of Unix98 PTYs that can be used at any one time.
292	  The default is 256, and should be enough for desktop systems. Server
293	  machines which support incoming telnet/rlogin/ssh connections and/or
294	  serve several X terminals may want to increase this: every incoming
295	  connection and every xterm uses up one PTY.
296
297	  When not in use, each additional set of 256 PTYs occupy
298	  approximately 8 KB of kernel memory on 32-bit architectures.
299
300endmenu
301
302source "fs/Kconfig"
303
304menu "Instrumentation Support"
305	depends on EXPERIMENTAL
306
307source "arch/sparc/oprofile/Kconfig"
308
309endmenu
310
311source "arch/sparc/Kconfig.debug"
312
313source "security/Kconfig"
314
315source "crypto/Kconfig"
316
317source "lib/Kconfig"
318