xref: /openbmc/linux/arch/sparc/Kconfig (revision f15cbe6f) 
1# For a description of the syntax of this configuration file,
2# see Documentation/kbuild/kconfig-language.txt.
3#
4
5mainmenu "Linux/SPARC Kernel Configuration"
6
7config MMU
8	bool
9	default y
10
11config HIGHMEM
12	bool
13	default y
14
15config ZONE_DMA
16	bool
17	default y
18
19config GENERIC_ISA_DMA
20	bool
21	default y
22
23config ARCH_NO_VIRT_TO_BUS
24	def_bool y
25
26config OF
27	def_bool y
28
29config HZ
30	int
31	default 100
32
33source "init/Kconfig"
34
35menu "General machine setup"
36
37config SMP
38	bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
39	---help---
40	  This enables support for systems with more than one CPU. If you have
41	  a system with only one CPU, say N. If you have a system with more
42	  than one CPU, say Y.
43
44	  If you say N here, the kernel will run on single and multiprocessor
45	  machines, but will use only one CPU of a multiprocessor machine. If
46	  you say Y here, the kernel will run on many, but not all,
47	  singleprocessor machines. On a singleprocessor machine, the kernel
48	  will run faster if you say N here.
49
50	  People using multiprocessor machines who say Y here should also say
51	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
52	  Management" code will be disabled if you say Y here.
53
54	  See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
55	  available at <http://www.tldp.org/docs.html#howto>.
56
57	  If you don't know what to do here, say N.
58
59config NR_CPUS
60	int "Maximum number of CPUs (2-32)"
61	range 2 32
62	depends on SMP
63	default "32"
64
65config SPARC
66	bool
67	default y
68	select HAVE_IDE
69	select HAVE_OPROFILE
70	select HAVE_ARCH_KGDB if !SMP
71	select HAVE_ARCH_TRACEHOOK
72
73# Identify this as a Sparc32 build
74config SPARC32
75	bool
76	default y
77	help
78	  SPARC is a family of RISC microprocessors designed and marketed by
79	  Sun Microsystems, incorporated.  They are very widely found in Sun
80	  workstations and clones. This port covers the original 32-bit SPARC;
81	  it is old and stable and usually considered one of the "big three"
82	  along with the Intel and Alpha ports.  The UltraLinux project
83	  maintains both the SPARC32 and SPARC64 ports; its web page is
84	  available at <http://www.ultralinux.org/>.
85
86# Global things across all Sun machines.
87config ISA
88	bool
89	help
90	  ISA is found on Espresso only and is not supported currently.
91	  Say N
92
93config EISA
94	bool
95	help
96	  EISA is not supported.
97	  Say N
98
99config MCA
100	bool
101	help
102	  MCA is not supported.
103	  Say N
104
105config PCMCIA
106	tristate
107	---help---
108	  Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
109	  computer.  These are credit-card size devices such as network cards,
110	  modems or hard drives often used with laptops computers.  There are
111	  actually two varieties of these cards: the older 16 bit PCMCIA cards
112	  and the newer 32 bit CardBus cards.  If you want to use CardBus
113	  cards, you need to say Y here and also to "CardBus support" below.
114
115	  To use your PC-cards, you will need supporting software from David
116	  Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
117	  for location).  Please also read the PCMCIA-HOWTO, available from
118	  <http://www.tldp.org/docs.html#howto>.
119
120	  To compile this driver as modules, choose M here: the
121	  modules will be called pcmcia_core and ds.
122
123config SBUS
124	bool
125	default y
126
127config SBUSCHAR
128	bool
129	default y
130
131config SERIAL_CONSOLE
132	bool
133	default y
134	---help---
135	  If you say Y here, it will be possible to use a serial port as the
136	  system console (the system console is the device which receives all
137	  kernel messages and warnings and which allows logins in single user
138	  mode). This could be useful if some terminal or printer is connected
139	  to that serial port.
140
141	  Even if you say Y here, the currently visible virtual console
142	  (/dev/tty0) will still be used as the system console by default, but
143	  you can alter that using a kernel command line option such as
144	  "console=ttyS1". (Try "man bootparam" or see the documentation of
145	  your boot loader (silo) about how to pass options to the kernel at
146	  boot time.)
147
148	  If you don't have a graphics card installed and you say Y here, the
149	  kernel will automatically use the first serial line, /dev/ttyS0, as
150	  system console.
151
152	  If unsure, say N.
153
154config SUN_AUXIO
155	bool
156	default y
157
158config SUN_IO
159	bool
160	default y
161
162config RWSEM_GENERIC_SPINLOCK
163	bool
164	default y
165
166config RWSEM_XCHGADD_ALGORITHM
167	bool
168
169config GENERIC_FIND_NEXT_BIT
170	bool
171	default y
172
173config GENERIC_HWEIGHT
174	bool
175	default y
176
177config GENERIC_CALIBRATE_DELAY
178	bool
179	default y
180
181config ARCH_MAY_HAVE_PC_FDC
182	bool
183	default y
184
185config ARCH_HAS_ILOG2_U32
186	bool
187	default n
188
189config ARCH_HAS_ILOG2_U64
190	bool
191	default n
192
193config EMULATED_CMPXCHG
194	bool
195	default y
196	help
197	  Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
198	  is emulated, and therefore it is not completely atomic.
199
200config SUN_PM
201	bool
202	default y
203	help
204	  Enable power management and CPU standby features on supported
205	  SPARC platforms.
206
207config SUN4
208	bool "Support for SUN4 machines (disables SUN4[CDM] support)"
209	depends on !SMP
210	default n
211	help
212	  Say Y here if, and only if, your machine is a sun4. Note that
213	  a kernel compiled with this option will run only on sun4.
214	  (And the current version will probably work only on sun4/330.)
215
216if !SUN4
217
218config PCI
219	bool "Support for PCI and PS/2 keyboard/mouse"
220	help
221	  CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
222	  CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
223	  All of these platforms are extremely obscure, so say N if unsure.
224
225config PCI_SYSCALL
226	def_bool PCI
227
228source "drivers/pci/Kconfig"
229
230endif
231
232config NO_DMA
233	def_bool !PCI
234
235config SUN_OPENPROMFS
236	tristate "Openprom tree appears in /proc/openprom"
237	help
238	  If you say Y, the OpenPROM device tree will be available as a
239	  virtual file system, which you can mount to /proc/openprom by "mount
240	  -t openpromfs none /proc/openprom".
241
242	  To compile the /proc/openprom support as a module, choose M here: the
243	  module will be called openpromfs.
244
245	  Only choose N if you know in advance that you will not need to modify
246	  OpenPROM settings on the running system.
247
248config SPARC_LED
249	tristate "Sun4m LED driver"
250	help
251	  This driver toggles the front-panel LED on sun4m systems
252	  in a user-specifiable manner.  Its state can be probed
253	  by reading /proc/led and its blinking mode can be changed
254	  via writes to /proc/led
255
256source "fs/Kconfig.binfmt"
257
258source "mm/Kconfig"
259
260endmenu
261
262source "net/Kconfig"
263
264source "drivers/Kconfig"
265
266if !SUN4
267source "drivers/sbus/char/Kconfig"
268endif
269
270# This one must be before the filesystem configs. -DaveM
271
272menu "Unix98 PTY support"
273
274config UNIX98_PTYS
275	bool "Unix98 PTY support"
276	---help---
277	  A pseudo terminal (PTY) is a software device consisting of two
278	  halves: a master and a slave. The slave device behaves identical to
279	  a physical terminal; the master device is used by a process to
280	  read data from and write data to the slave, thereby emulating a
281	  terminal. Typical programs for the master side are telnet servers
282	  and xterms.
283
284	  Linux has traditionally used the BSD-like names /dev/ptyxx for
285	  masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
286	  has a number of problems. The GNU C library glibc 2.1 and later,
287	  however, supports the Unix98 naming standard: in order to acquire a
288	  pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
289	  terminal is then made available to the process and the pseudo
290	  terminal slave can be accessed as /dev/pts/<number>. What was
291	  traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
292
293	  The entries in /dev/pts/ are created on the fly by a virtual
294	  file system; therefore, if you say Y here you should say Y to
295	  "/dev/pts file system for Unix98 PTYs" as well.
296
297	  If you want to say Y here, you need to have the C library glibc 2.1
298	  or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
299	  Read the instructions in <file:Documentation/Changes> pertaining to
300	  pseudo terminals. It's safe to say N.
301
302endmenu
303
304source "fs/Kconfig"
305
306source "arch/sparc/Kconfig.debug"
307
308source "security/Kconfig"
309
310source "crypto/Kconfig"
311
312source "lib/Kconfig"
313