xref: /openbmc/linux/arch/sparc/Kconfig (revision 96de0e252cedffad61b3cb5e05662c591898e69a) 
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
24config ARCH_NO_VIRT_TO_BUS
25	def_bool y
26
27config OF
28	def_bool y
29
30source "init/Kconfig"
31
32menu "General machine setup"
33
34config SMP
35	bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
36	---help---
37	  This enables support for systems with more than one CPU. If you have
38	  a system with only one CPU, say N. If you have a system with more
39	  than one CPU, say Y.
40
41	  If you say N here, the kernel will run on single and multiprocessor
42	  machines, but will use only one CPU of a multiprocessor machine. If
43	  you say Y here, the kernel will run on many, but not all,
44	  singleprocessor machines. On a singleprocessor machine, the kernel
45	  will run faster if you say N here.
46
47	  People using multiprocessor machines who say Y here should also say
48	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
49	  Management" code will be disabled if you say Y here.
50
51	  See also the <file:Documentation/smp.txt>,
52	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
53	  <http://www.tldp.org/docs.html#howto>.
54
55	  If you don't know what to do here, say N.
56
57config NR_CPUS
58	int "Maximum number of CPUs (2-32)"
59	range 2 32
60	depends on SMP
61	default "32"
62
63config SPARC
64	bool
65	default y
66
67# Identify this as a Sparc32 build
68config SPARC32
69	bool
70	default y
71	help
72	  SPARC is a family of RISC microprocessors designed and marketed by
73	  Sun Microsystems, incorporated.  They are very widely found in Sun
74	  workstations and clones. This port covers the original 32-bit SPARC;
75	  it is old and stable and usually considered one of the "big three"
76	  along with the Intel and Alpha ports.  The UltraLinux project
77	  maintains both the SPARC32 and SPARC64 ports; its web page is
78	  available at <http://www.ultralinux.org/>.
79
80# Global things across all Sun machines.
81config ISA
82	bool
83	help
84	  ISA is found on Espresso only and is not supported currently.
85	  Say N
86
87config EISA
88	bool
89	help
90	  EISA is not supported.
91	  Say N
92
93config MCA
94	bool
95	help
96	  MCA is not supported.
97	  Say N
98
99config PCMCIA
100	tristate
101	---help---
102	  Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
103	  computer.  These are credit-card size devices such as network cards,
104	  modems or hard drives often used with laptops computers.  There are
105	  actually two varieties of these cards: the older 16 bit PCMCIA cards
106	  and the newer 32 bit CardBus cards.  If you want to use CardBus
107	  cards, you need to say Y here and also to "CardBus support" below.
108
109	  To use your PC-cards, you will need supporting software from David
110	  Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
111	  for location).  Please also read the PCMCIA-HOWTO, available from
112	  <http://www.tldp.org/docs.html#howto>.
113
114	  To compile this driver as modules, choose M here: the
115	  modules will be called pcmcia_core and ds.
116
117config SBUS
118	bool
119	default y
120
121config SBUSCHAR
122	bool
123	default y
124
125config SERIAL_CONSOLE
126	bool
127	default y
128	---help---
129	  If you say Y here, it will be possible to use a serial port as the
130	  system console (the system console is the device which receives all
131	  kernel messages and warnings and which allows logins in single user
132	  mode). This could be useful if some terminal or printer is connected
133	  to that serial port.
134
135	  Even if you say Y here, the currently visible virtual console
136	  (/dev/tty0) will still be used as the system console by default, but
137	  you can alter that using a kernel command line option such as
138	  "console=ttyS1". (Try "man bootparam" or see the documentation of
139	  your boot loader (silo) about how to pass options to the kernel at
140	  boot time.)
141
142	  If you don't have a graphics card installed and you say Y here, the
143	  kernel will automatically use the first serial line, /dev/ttyS0, as
144	  system console.
145
146	  If unsure, say N.
147
148config SUN_AUXIO
149	bool
150	default y
151
152config SUN_IO
153	bool
154	default y
155
156config RWSEM_GENERIC_SPINLOCK
157	bool
158	default y
159
160config RWSEM_XCHGADD_ALGORITHM
161	bool
162
163config GENERIC_FIND_NEXT_BIT
164	bool
165	default y
166
167config GENERIC_HWEIGHT
168	bool
169	default y
170
171config GENERIC_CALIBRATE_DELAY
172	bool
173	default y
174
175config ARCH_MAY_HAVE_PC_FDC
176	bool
177	default y
178
179config ARCH_HAS_ILOG2_U32
180	bool
181	default n
182
183config ARCH_HAS_ILOG2_U64
184	bool
185	default n
186
187config EMULATED_CMPXCHG
188	bool
189	default y
190	help
191	  Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
192	  is emulated, and therefore it is not completely atomic.
193
194config SUN_PM
195	bool
196	default y
197	help
198	  Enable power management and CPU standby features on supported
199	  SPARC platforms.
200
201config SUN4
202	bool "Support for SUN4 machines (disables SUN4[CDM] support)"
203	depends on !SMP
204	default n
205	help
206	  Say Y here if, and only if, your machine is a sun4. Note that
207	  a kernel compiled with this option will run only on sun4.
208	  (And the current version will probably work only on sun4/330.)
209
210if !SUN4
211
212config PCI
213	bool "Support for PCI and PS/2 keyboard/mouse"
214	help
215	  CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
216	  CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
217	  All of these platforms are extremely obscure, so say N if unsure.
218
219config PCI_SYSCALL
220	def_bool PCI
221
222source "drivers/pci/Kconfig"
223
224endif
225
226config NO_DMA
227	def_bool !PCI
228
229config SUN_OPENPROMFS
230	tristate "Openprom tree appears in /proc/openprom"
231	help
232	  If you say Y, the OpenPROM device tree will be available as a
233	  virtual file system, which you can mount to /proc/openprom by "mount
234	  -t openpromfs none /proc/openprom".
235
236	  To compile the /proc/openprom support as a module, choose M here: the
237	  module will be called openpromfs.
238
239	  Only choose N if you know in advance that you will not need to modify
240	  OpenPROM settings on the running system.
241
242config SPARC_LED
243	tristate "Sun4m LED driver"
244	help
245	  This driver toggles the front-panel LED on sun4m systems
246	  in a user-specifiable manner.  Its state can be probed
247	  by reading /proc/led and its blinking mode can be changed
248	  via writes to /proc/led
249
250source "fs/Kconfig.binfmt"
251
252config SUNOS_EMUL
253	bool "SunOS binary emulation"
254	help
255	  This allows you to run most SunOS binaries.  If you want to do this,
256	  say Y here and place appropriate files in /usr/gnemul/sunos. See
257	  <http://www.ultralinux.org/faq.html> for more information.  If you
258	  want to run SunOS binaries on an Ultra you must also say Y to
259	  "Kernel support for 32-bit a.out binaries" above.
260
261source "mm/Kconfig"
262
263endmenu
264
265source "net/Kconfig"
266
267source "drivers/Kconfig"
268
269if !SUN4
270source "drivers/sbus/char/Kconfig"
271endif
272
273# This one must be before the filesystem configs. -DaveM
274
275menu "Unix98 PTY support"
276
277config UNIX98_PTYS
278	bool "Unix98 PTY support"
279	---help---
280	  A pseudo terminal (PTY) is a software device consisting of two
281	  halves: a master and a slave. The slave device behaves identical to
282	  a physical terminal; the master device is used by a process to
283	  read data from and write data to the slave, thereby emulating a
284	  terminal. Typical programs for the master side are telnet servers
285	  and xterms.
286
287	  Linux has traditionally used the BSD-like names /dev/ptyxx for
288	  masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
289	  has a number of problems. The GNU C library glibc 2.1 and later,
290	  however, supports the Unix98 naming standard: in order to acquire a
291	  pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
292	  terminal is then made available to the process and the pseudo
293	  terminal slave can be accessed as /dev/pts/<number>. What was
294	  traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
295
296	  The entries in /dev/pts/ are created on the fly by a virtual
297	  file system; therefore, if you say Y here you should say Y to
298	  "/dev/pts file system for Unix98 PTYs" as well.
299
300	  If you want to say Y here, you need to have the C library glibc 2.1
301	  or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
302	  Read the instructions in <file:Documentation/Changes> pertaining to
303	  pseudo terminals. It's safe to say N.
304
305config UNIX98_PTY_COUNT
306	int "Maximum number of Unix98 PTYs in use (0-2048)"
307	depends on UNIX98_PTYS
308	default "256"
309	help
310	  The maximum number of Unix98 PTYs that can be used at any one time.
311	  The default is 256, and should be enough for desktop systems. Server
312	  machines which support incoming telnet/rlogin/ssh connections and/or
313	  serve several X terminals may want to increase this: every incoming
314	  connection and every xterm uses up one PTY.
315
316	  When not in use, each additional set of 256 PTYs occupy
317	  approximately 8 KB of kernel memory on 32-bit architectures.
318
319endmenu
320
321source "fs/Kconfig"
322
323source "kernel/Kconfig.instrumentation"
324
325source "arch/sparc/Kconfig.debug"
326
327source "security/Kconfig"
328
329source "crypto/Kconfig"
330
331source "lib/Kconfig"
332