xref: /openbmc/linux/arch/sparc/Kconfig (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
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 UID16
13	bool
14	default y
15
16config HIGHMEM
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	depends on BROKEN
31	---help---
32	  This enables support for systems with more than one CPU. If you have
33	  a system with only one CPU, say N. If you have a system with more
34	  than one CPU, say Y.
35
36	  If you say N here, the kernel will run on single and multiprocessor
37	  machines, but will use only one CPU of a multiprocessor machine. If
38	  you say Y here, the kernel will run on many, but not all,
39	  singleprocessor machines. On a singleprocessor machine, the kernel
40	  will run faster if you say N here.
41
42	  People using multiprocessor machines who say Y here should also say
43	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
44	  Management" code will be disabled if you say Y here.
45
46	  See also the <file:Documentation/smp.txt>,
47	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
48	  <http://www.tldp.org/docs.html#howto>.
49
50	  If you don't know what to do here, say N.
51
52config NR_CPUS
53	int "Maximum number of CPUs (2-32)"
54	range 2 32
55	depends on SMP
56	default "32"
57
58# Identify this as a Sparc32 build
59config SPARC32
60	bool
61	default y
62	help
63	  SPARC is a family of RISC microprocessors designed and marketed by
64	  Sun Microsystems, incorporated.  They are very widely found in Sun
65	  workstations and clones. This port covers the original 32-bit SPARC;
66	  it is old and stable and usually considered one of the "big three"
67	  along with the Intel and Alpha ports.  The UltraLinux project
68	  maintains both the SPARC32 and SPARC64 ports; its web page is
69	  available at <http://www.ultralinux.org/>.
70
71# Global things across all Sun machines.
72config ISA
73	bool
74	help
75	  ISA is found on Espresso only and is not supported currently.
76	  Say N
77
78config EISA
79	bool
80	help
81	  EISA is not supported.
82	  Say N
83
84config MCA
85	bool
86	help
87	  MCA is not supported.
88	  Say N
89
90config PCMCIA
91	tristate
92	---help---
93	  Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
94	  computer.  These are credit-card size devices such as network cards,
95	  modems or hard drives often used with laptops computers.  There are
96	  actually two varieties of these cards: the older 16 bit PCMCIA cards
97	  and the newer 32 bit CardBus cards.  If you want to use CardBus
98	  cards, you need to say Y here and also to "CardBus support" below.
99
100	  To use your PC-cards, you will need supporting software from David
101	  Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
102	  for location).  Please also read the PCMCIA-HOWTO, available from
103	  <http://www.tldp.org/docs.html#howto>.
104
105	  To compile this driver as modules, choose M here: the
106	  modules will be called pcmcia_core and ds.
107
108config SBUS
109	bool
110	default y
111
112config SBUSCHAR
113	bool
114	default y
115
116config SERIAL_CONSOLE
117	bool
118	default y
119	---help---
120	  If you say Y here, it will be possible to use a serial port as the
121	  system console (the system console is the device which receives all
122	  kernel messages and warnings and which allows logins in single user
123	  mode). This could be useful if some terminal or printer is connected
124	  to that serial port.
125
126	  Even if you say Y here, the currently visible virtual console
127	  (/dev/tty0) will still be used as the system console by default, but
128	  you can alter that using a kernel command line option such as
129	  "console=ttyS1". (Try "man bootparam" or see the documentation of
130	  your boot loader (silo) about how to pass options to the kernel at
131	  boot time.)
132
133	  If you don't have a graphics card installed and you say Y here, the
134	  kernel will automatically use the first serial line, /dev/ttyS0, as
135	  system console.
136
137	  If unsure, say N.
138
139config SUN_AUXIO
140	bool
141	default y
142
143config SUN_IO
144	bool
145	default y
146
147config RWSEM_GENERIC_SPINLOCK
148	bool
149	default y
150
151config RWSEM_XCHGADD_ALGORITHM
152	bool
153
154config GENERIC_CALIBRATE_DELAY
155	bool
156	default y
157
158config ARCH_MAY_HAVE_PC_FDC
159	bool
160	default y
161
162config SUN_PM
163	bool
164	default y
165	help
166	  Enable power management and CPU standby features on supported
167	  SPARC platforms.
168
169config SUN4
170	bool "Support for SUN4 machines (disables SUN4[CDM] support)"
171	depends on !SMP
172	default n
173	help
174	  Say Y here if, and only if, your machine is a sun4. Note that
175	  a kernel compiled with this option will run only on sun4.
176	  (And the current version will probably work only on sun4/330.)
177
178if !SUN4
179
180config PCI
181	bool "Support for PCI and PS/2 keyboard/mouse"
182	help
183	  CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
184	  CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
185	  All of these platforms are extremely obscure, so say N if unsure.
186
187source "drivers/pci/Kconfig"
188
189endif
190
191config SUN_OPENPROMFS
192	tristate "Openprom tree appears in /proc/openprom"
193	help
194	  If you say Y, the OpenPROM device tree will be available as a
195	  virtual file system, which you can mount to /proc/openprom by "mount
196	  -t openpromfs none /proc/openprom".
197
198	  To compile the /proc/openprom support as a module, choose M here: the
199	  module will be called openpromfs.
200
201	  Only choose N if you know in advance that you will not need to modify
202	  OpenPROM settings on the running system.
203
204source "fs/Kconfig.binfmt"
205
206config SUNOS_EMUL
207	bool "SunOS binary emulation"
208	help
209	  This allows you to run most SunOS binaries.  If you want to do this,
210	  say Y here and place appropriate files in /usr/gnemul/sunos. See
211	  <http://www.ultralinux.org/faq.html> for more information.  If you
212	  want to run SunOS binaries on an Ultra you must also say Y to
213	  "Kernel support for 32-bit a.out binaries" above.
214
215source "mm/Kconfig"
216
217endmenu
218
219source "net/Kconfig"
220
221source "drivers/Kconfig"
222
223if !SUN4
224source "drivers/sbus/char/Kconfig"
225endif
226
227# This one must be before the filesystem configs. -DaveM
228
229menu "Unix98 PTY support"
230
231config UNIX98_PTYS
232	bool "Unix98 PTY support"
233	---help---
234	  A pseudo terminal (PTY) is a software device consisting of two
235	  halves: a master and a slave. The slave device behaves identical to
236	  a physical terminal; the master device is used by a process to
237	  read data from and write data to the slave, thereby emulating a
238	  terminal. Typical programs for the master side are telnet servers
239	  and xterms.
240
241	  Linux has traditionally used the BSD-like names /dev/ptyxx for
242	  masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
243	  has a number of problems. The GNU C library glibc 2.1 and later,
244	  however, supports the Unix98 naming standard: in order to acquire a
245	  pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
246	  terminal is then made available to the process and the pseudo
247	  terminal slave can be accessed as /dev/pts/<number>. What was
248	  traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
249
250	  The entries in /dev/pts/ are created on the fly by a virtual
251	  file system; therefore, if you say Y here you should say Y to
252	  "/dev/pts file system for Unix98 PTYs" as well.
253
254	  If you want to say Y here, you need to have the C library glibc 2.1
255	  or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
256	  Read the instructions in <file:Documentation/Changes> pertaining to
257	  pseudo terminals. It's safe to say N.
258
259config UNIX98_PTY_COUNT
260	int "Maximum number of Unix98 PTYs in use (0-2048)"
261	depends on UNIX98_PTYS
262	default "256"
263	help
264	  The maximum number of Unix98 PTYs that can be used at any one time.
265	  The default is 256, and should be enough for desktop systems. Server
266	  machines which support incoming telnet/rlogin/ssh connections and/or
267	  serve several X terminals may want to increase this: every incoming
268	  connection and every xterm uses up one PTY.
269
270	  When not in use, each additional set of 256 PTYs occupy
271	  approximately 8 KB of kernel memory on 32-bit architectures.
272
273endmenu
274
275source "fs/Kconfig"
276
277source "arch/sparc/Kconfig.debug"
278
279source "security/Kconfig"
280
281source "crypto/Kconfig"
282
283source "lib/Kconfig"
284