xref: /openbmc/linux/arch/sparc/Kconfig (revision 643d1f7f) 
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 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
52	  available at <http://www.tldp.org/docs.html#howto>.
53
54	  If you don't know what to do here, say N.
55
56config NR_CPUS
57	int "Maximum number of CPUs (2-32)"
58	range 2 32
59	depends on SMP
60	default "32"
61
62config SPARC
63	bool
64	default y
65
66# Identify this as a Sparc32 build
67config SPARC32
68	bool
69	default y
70	help
71	  SPARC is a family of RISC microprocessors designed and marketed by
72	  Sun Microsystems, incorporated.  They are very widely found in Sun
73	  workstations and clones. This port covers the original 32-bit SPARC;
74	  it is old and stable and usually considered one of the "big three"
75	  along with the Intel and Alpha ports.  The UltraLinux project
76	  maintains both the SPARC32 and SPARC64 ports; its web page is
77	  available at <http://www.ultralinux.org/>.
78
79# Global things across all Sun machines.
80config ISA
81	bool
82	help
83	  ISA is found on Espresso only and is not supported currently.
84	  Say N
85
86config EISA
87	bool
88	help
89	  EISA is not supported.
90	  Say N
91
92config MCA
93	bool
94	help
95	  MCA is not supported.
96	  Say N
97
98config PCMCIA
99	tristate
100	---help---
101	  Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
102	  computer.  These are credit-card size devices such as network cards,
103	  modems or hard drives often used with laptops computers.  There are
104	  actually two varieties of these cards: the older 16 bit PCMCIA cards
105	  and the newer 32 bit CardBus cards.  If you want to use CardBus
106	  cards, you need to say Y here and also to "CardBus support" below.
107
108	  To use your PC-cards, you will need supporting software from David
109	  Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
110	  for location).  Please also read the PCMCIA-HOWTO, available from
111	  <http://www.tldp.org/docs.html#howto>.
112
113	  To compile this driver as modules, choose M here: the
114	  modules will be called pcmcia_core and ds.
115
116config SBUS
117	bool
118	default y
119
120config SBUSCHAR
121	bool
122	default y
123
124config SERIAL_CONSOLE
125	bool
126	default y
127	---help---
128	  If you say Y here, it will be possible to use a serial port as the
129	  system console (the system console is the device which receives all
130	  kernel messages and warnings and which allows logins in single user
131	  mode). This could be useful if some terminal or printer is connected
132	  to that serial port.
133
134	  Even if you say Y here, the currently visible virtual console
135	  (/dev/tty0) will still be used as the system console by default, but
136	  you can alter that using a kernel command line option such as
137	  "console=ttyS1". (Try "man bootparam" or see the documentation of
138	  your boot loader (silo) about how to pass options to the kernel at
139	  boot time.)
140
141	  If you don't have a graphics card installed and you say Y here, the
142	  kernel will automatically use the first serial line, /dev/ttyS0, as
143	  system console.
144
145	  If unsure, say N.
146
147config SUN_AUXIO
148	bool
149	default y
150
151config SUN_IO
152	bool
153	default y
154
155config RWSEM_GENERIC_SPINLOCK
156	bool
157	default y
158
159config RWSEM_XCHGADD_ALGORITHM
160	bool
161
162config GENERIC_FIND_NEXT_BIT
163	bool
164	default y
165
166config GENERIC_HWEIGHT
167	bool
168	default y
169
170config GENERIC_CALIBRATE_DELAY
171	bool
172	default y
173
174config ARCH_MAY_HAVE_PC_FDC
175	bool
176	default y
177
178config ARCH_HAS_ILOG2_U32
179	bool
180	default n
181
182config ARCH_HAS_ILOG2_U64
183	bool
184	default n
185
186config EMULATED_CMPXCHG
187	bool
188	default y
189	help
190	  Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
191	  is emulated, and therefore it is not completely atomic.
192
193config SUN_PM
194	bool
195	default y
196	help
197	  Enable power management and CPU standby features on supported
198	  SPARC platforms.
199
200config SUN4
201	bool "Support for SUN4 machines (disables SUN4[CDM] support)"
202	depends on !SMP
203	default n
204	help
205	  Say Y here if, and only if, your machine is a sun4. Note that
206	  a kernel compiled with this option will run only on sun4.
207	  (And the current version will probably work only on sun4/330.)
208
209if !SUN4
210
211config PCI
212	bool "Support for PCI and PS/2 keyboard/mouse"
213	help
214	  CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
215	  CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
216	  All of these platforms are extremely obscure, so say N if unsure.
217
218config PCI_SYSCALL
219	def_bool PCI
220
221source "drivers/pci/Kconfig"
222
223endif
224
225config NO_DMA
226	def_bool !PCI
227
228config SUN_OPENPROMFS
229	tristate "Openprom tree appears in /proc/openprom"
230	help
231	  If you say Y, the OpenPROM device tree will be available as a
232	  virtual file system, which you can mount to /proc/openprom by "mount
233	  -t openpromfs none /proc/openprom".
234
235	  To compile the /proc/openprom support as a module, choose M here: the
236	  module will be called openpromfs.
237
238	  Only choose N if you know in advance that you will not need to modify
239	  OpenPROM settings on the running system.
240
241config SPARC_LED
242	tristate "Sun4m LED driver"
243	help
244	  This driver toggles the front-panel LED on sun4m systems
245	  in a user-specifiable manner.  Its state can be probed
246	  by reading /proc/led and its blinking mode can be changed
247	  via writes to /proc/led
248
249source "fs/Kconfig.binfmt"
250
251config SUNOS_EMUL
252	bool "SunOS binary emulation"
253	help
254	  This allows you to run most SunOS binaries.  If you want to do this,
255	  say Y here and place appropriate files in /usr/gnemul/sunos. See
256	  <http://www.ultralinux.org/faq.html> for more information.  If you
257	  want to run SunOS binaries on an Ultra you must also say Y to
258	  "Kernel support for 32-bit a.out binaries" above.
259
260source "mm/Kconfig"
261
262endmenu
263
264source "net/Kconfig"
265
266source "drivers/Kconfig"
267
268if !SUN4
269source "drivers/sbus/char/Kconfig"
270endif
271
272# This one must be before the filesystem configs. -DaveM
273
274menu "Unix98 PTY support"
275
276config UNIX98_PTYS
277	bool "Unix98 PTY support"
278	---help---
279	  A pseudo terminal (PTY) is a software device consisting of two
280	  halves: a master and a slave. The slave device behaves identical to
281	  a physical terminal; the master device is used by a process to
282	  read data from and write data to the slave, thereby emulating a
283	  terminal. Typical programs for the master side are telnet servers
284	  and xterms.
285
286	  Linux has traditionally used the BSD-like names /dev/ptyxx for
287	  masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
288	  has a number of problems. The GNU C library glibc 2.1 and later,
289	  however, supports the Unix98 naming standard: in order to acquire a
290	  pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
291	  terminal is then made available to the process and the pseudo
292	  terminal slave can be accessed as /dev/pts/<number>. What was
293	  traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
294
295	  The entries in /dev/pts/ are created on the fly by a virtual
296	  file system; therefore, if you say Y here you should say Y to
297	  "/dev/pts file system for Unix98 PTYs" as well.
298
299	  If you want to say Y here, you need to have the C library glibc 2.1
300	  or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
301	  Read the instructions in <file:Documentation/Changes> pertaining to
302	  pseudo terminals. It's safe to say N.
303
304config UNIX98_PTY_COUNT
305	int "Maximum number of Unix98 PTYs in use (0-2048)"
306	depends on UNIX98_PTYS
307	default "256"
308	help
309	  The maximum number of Unix98 PTYs that can be used at any one time.
310	  The default is 256, and should be enough for desktop systems. Server
311	  machines which support incoming telnet/rlogin/ssh connections and/or
312	  serve several X terminals may want to increase this: every incoming
313	  connection and every xterm uses up one PTY.
314
315	  When not in use, each additional set of 256 PTYs occupy
316	  approximately 8 KB of kernel memory on 32-bit architectures.
317
318endmenu
319
320source "fs/Kconfig"
321
322source "kernel/Kconfig.instrumentation"
323
324source "arch/sparc/Kconfig.debug"
325
326source "security/Kconfig"
327
328source "crypto/Kconfig"
329
330source "lib/Kconfig"
331