xref: /openbmc/linux/arch/sparc/Kconfig (revision b04b4f78)
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 64BIT
8	bool "64-bit kernel" if ARCH = "sparc"
9	default ARCH = "sparc64"
10	help
11	  SPARC is a family of RISC microprocessors designed and marketed by
12	  Sun Microsystems, incorporated.  They are very widely found in Sun
13	  workstations and clones.
14
15	  Say yes to build a 64-bit kernel - formerly known as sparc64
16	  Say no to build a 32-bit kernel - formerly known as sparc
17
18config SPARC
19	bool
20	default y
21	select HAVE_IDE
22	select HAVE_OPROFILE
23	select HAVE_ARCH_KGDB if !SMP || SPARC64
24	select HAVE_ARCH_TRACEHOOK
25	select ARCH_WANT_OPTIONAL_GPIOLIB
26	select RTC_CLASS
27	select RTC_DRV_M48T59
28
29config SPARC32
30	def_bool !64BIT
31
32config SPARC64
33	def_bool 64BIT
34	select ARCH_SUPPORTS_MSI
35	select HAVE_FUNCTION_TRACER
36	select HAVE_KRETPROBES
37	select HAVE_KPROBES
38	select HAVE_LMB
39	select HAVE_SYSCALL_WRAPPERS
40	select USE_GENERIC_SMP_HELPERS if SMP
41	select RTC_DRV_CMOS
42	select RTC_DRV_BQ4802
43	select RTC_DRV_SUN4V
44	select RTC_DRV_STARFIRE
45
46config ARCH_DEFCONFIG
47	string
48	default "arch/sparc/configs/sparc32_defconfig" if SPARC32
49	default "arch/sparc/configs/sparc64_defconfig" if SPARC64
50
51# CONFIG_BITS can be used at source level to get 32/64 bits
52config BITS
53	int
54	default 32 if SPARC32
55	default 64 if SPARC64
56
57config GENERIC_TIME
58	bool
59	default y if SPARC64
60
61config GENERIC_CMOS_UPDATE
62	bool
63	default y if SPARC64
64
65config GENERIC_CLOCKEVENTS
66	bool
67	default y if SPARC64
68
69config IOMMU_HELPER
70	bool
71	default y if SPARC64
72
73config QUICKLIST
74	bool
75	default y if SPARC64
76
77config STACKTRACE_SUPPORT
78	bool
79	default y if SPARC64
80
81config LOCKDEP_SUPPORT
82	bool
83	default y if SPARC64
84
85config HAVE_LATENCYTOP_SUPPORT
86	bool
87	default y if SPARC64
88
89config AUDIT_ARCH
90	bool
91	default y
92
93config HAVE_SETUP_PER_CPU_AREA
94	def_bool y if SPARC64
95
96config GENERIC_HARDIRQS_NO__DO_IRQ
97	bool
98	def_bool y if SPARC64
99
100config MMU
101	bool
102	default y
103
104config HIGHMEM
105	bool
106	default y if SPARC32
107
108config ZONE_DMA
109	bool
110	default y if SPARC32
111
112config GENERIC_ISA_DMA
113	bool
114	default y if SPARC32
115
116config GENERIC_GPIO
117	bool
118	help
119	  Generic GPIO API support
120
121config ARCH_NO_VIRT_TO_BUS
122	def_bool y
123
124config OF
125	def_bool y
126
127config ARCH_SUPPORTS_DEBUG_PAGEALLOC
128	def_bool y if SPARC64
129
130source "init/Kconfig"
131
132source "kernel/Kconfig.freezer"
133
134menu "Processor type and features"
135
136config SMP
137	bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
138	---help---
139	  This enables support for systems with more than one CPU. If you have
140	  a system with only one CPU, say N. If you have a system with more
141	  than one CPU, say Y.
142
143	  If you say N here, the kernel will run on single and multiprocessor
144	  machines, but will use only one CPU of a multiprocessor machine. If
145	  you say Y here, the kernel will run on many, but not all,
146	  singleprocessor machines. On a singleprocessor machine, the kernel
147	  will run faster if you say N here.
148
149	  People using multiprocessor machines who say Y here should also say
150	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
151	  Management" code will be disabled if you say Y here.
152
153	  See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
154	  available at <http://www.tldp.org/docs.html#howto>.
155
156	  If you don't know what to do here, say N.
157
158config NR_CPUS
159	int "Maximum number of CPUs"
160	depends on SMP
161	range 2 32 if SPARC32
162	range 2 1024 if SPARC64
163	default 32 if SPARC32
164	default 64 if SPARC64
165
166source kernel/Kconfig.hz
167
168config RWSEM_GENERIC_SPINLOCK
169	bool
170	default y if SPARC32
171
172config RWSEM_XCHGADD_ALGORITHM
173	bool
174	default y if SPARC64
175
176config GENERIC_FIND_NEXT_BIT
177	bool
178	default y
179
180config GENERIC_HWEIGHT
181	bool
182	default y if !ULTRA_HAS_POPULATION_COUNT
183
184config GENERIC_CALIBRATE_DELAY
185	bool
186	default y
187
188config ARCH_MAY_HAVE_PC_FDC
189	bool
190	default y
191
192config EMULATED_CMPXCHG
193	bool
194	default y if SPARC32
195	help
196	  Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
197	  is emulated, and therefore it is not completely atomic.
198
199# Makefile helpers
200config SPARC32_SMP
201	bool
202	default y
203	depends on SPARC32 && SMP
204
205config SPARC64_SMP
206	bool
207	default y
208	depends on SPARC64 && SMP
209
210choice
211	prompt "Kernel page size" if SPARC64
212	default SPARC64_PAGE_SIZE_8KB
213
214config SPARC64_PAGE_SIZE_8KB
215	bool "8KB"
216	help
217	  This lets you select the page size of the kernel.
218
219	  8KB and 64KB work quite well, since SPARC ELF sections
220	  provide for up to 64KB alignment.
221
222	  If you don't know what to do, choose 8KB.
223
224config SPARC64_PAGE_SIZE_64KB
225	bool "64KB"
226
227endchoice
228
229config SECCOMP
230	bool "Enable seccomp to safely compute untrusted bytecode"
231	depends on SPARC64 && PROC_FS
232	default y
233	help
234	  This kernel feature is useful for number crunching applications
235	  that may need to compute untrusted bytecode during their
236	  execution. By using pipes or other transports made available to
237	  the process as file descriptors supporting the read/write
238	  syscalls, it's possible to isolate those applications in
239	  their own address space using seccomp. Once seccomp is
240	  enabled via /proc/<pid>/seccomp, it cannot be disabled
241	  and the task is only allowed to execute a few safe syscalls
242	  defined by each seccomp mode.
243
244	  If unsure, say Y. Only embedded should say N here.
245
246config HOTPLUG_CPU
247	bool "Support for hot-pluggable CPUs"
248	depends on SPARC64 && SMP
249	select HOTPLUG
250	help
251	  Say Y here to experiment with turning CPUs off and on.  CPUs
252	  can be controlled through /sys/devices/system/cpu/cpu#.
253	  Say N if you want to disable CPU hotplug.
254
255config GENERIC_HARDIRQS
256	bool
257	default y if SPARC64
258
259source "kernel/time/Kconfig"
260
261if SPARC64
262source "drivers/cpufreq/Kconfig"
263
264config US3_FREQ
265	tristate "UltraSPARC-III CPU Frequency driver"
266	depends on CPU_FREQ
267	select CPU_FREQ_TABLE
268	help
269	  This adds the CPUFreq driver for UltraSPARC-III processors.
270
271	  For details, take a look at <file:Documentation/cpu-freq>.
272
273	  If in doubt, say N.
274
275config US2E_FREQ
276	tristate "UltraSPARC-IIe CPU Frequency driver"
277	depends on CPU_FREQ
278	select CPU_FREQ_TABLE
279	help
280	  This adds the CPUFreq driver for UltraSPARC-IIe processors.
281
282	  For details, take a look at <file:Documentation/cpu-freq>.
283
284	  If in doubt, say N.
285
286endif
287
288config US3_MC
289	tristate "UltraSPARC-III Memory Controller driver"
290	depends on SPARC64
291	default y
292	help
293	  This adds a driver for the UltraSPARC-III memory controller.
294	  Loading this driver allows exact mnemonic strings to be
295	  printed in the event of a memory error, so that the faulty DIMM
296	  on the motherboard can be matched to the error.
297
298	  If in doubt, say Y, as this information can be very useful.
299
300# Global things across all Sun machines.
301config GENERIC_LOCKBREAK
302	bool
303	default y
304	depends on SPARC64 && SMP && PREEMPT
305
306choice
307	prompt "SPARC64 Huge TLB Page Size"
308	depends on SPARC64 && HUGETLB_PAGE
309	default HUGETLB_PAGE_SIZE_4MB
310
311config HUGETLB_PAGE_SIZE_4MB
312	bool "4MB"
313
314config HUGETLB_PAGE_SIZE_512K
315	bool "512K"
316
317config HUGETLB_PAGE_SIZE_64K
318	depends on !SPARC64_PAGE_SIZE_64KB
319	bool "64K"
320
321endchoice
322
323config NUMA
324	bool "NUMA support"
325	depends on SPARC64 && SMP
326
327config NODES_SHIFT
328	int
329	default "4"
330	depends on NEED_MULTIPLE_NODES
331
332# Some NUMA nodes have memory ranges that span
333# other nodes.  Even though a pfn is valid and
334# between a node's start and end pfns, it may not
335# reside on that node.  See memmap_init_zone()
336# for details.
337config NODES_SPAN_OTHER_NODES
338	def_bool y
339	depends on NEED_MULTIPLE_NODES
340
341config ARCH_POPULATES_NODE_MAP
342	def_bool y if SPARC64
343
344config ARCH_SELECT_MEMORY_MODEL
345	def_bool y if SPARC64
346
347config ARCH_SPARSEMEM_ENABLE
348	def_bool y if SPARC64
349	select SPARSEMEM_VMEMMAP_ENABLE
350
351config ARCH_SPARSEMEM_DEFAULT
352	def_bool y if SPARC64
353
354source "mm/Kconfig"
355
356config SCHED_SMT
357	bool "SMT (Hyperthreading) scheduler support"
358	depends on SPARC64 && SMP
359	default y
360	help
361	  SMT scheduler support improves the CPU scheduler's decision making
362	  when dealing with SPARC cpus at a cost of slightly increased overhead
363	  in some places. If unsure say N here.
364
365config SCHED_MC
366	bool "Multi-core scheduler support"
367	depends on SPARC64 && SMP
368	default y
369	help
370	  Multi-core scheduler support improves the CPU scheduler's decision
371	  making when dealing with multi-core CPU chips at a cost of slightly
372	  increased overhead in some places. If unsure say N here.
373
374if SPARC64
375source "kernel/Kconfig.preempt"
376endif
377
378config CMDLINE_BOOL
379	bool "Default bootloader kernel arguments"
380	depends on SPARC64
381
382config CMDLINE
383	string "Initial kernel command string"
384	depends on CMDLINE_BOOL
385	default "console=ttyS0,9600 root=/dev/sda1"
386	help
387	  Say Y here if you want to be able to pass default arguments to
388	  the kernel. This will be overridden by the bootloader, if you
389	  use one (such as SILO). This is most useful if you want to boot
390	  a kernel from TFTP, and want default options to be available
391	  with having them passed on the command line.
392
393	  NOTE: This option WILL override the PROM bootargs setting!
394
395config SUN_PM
396	bool
397	default y if SPARC32
398	help
399	  Enable power management and CPU standby features on supported
400	  SPARC platforms.
401
402config SPARC_LED
403	tristate "Sun4m LED driver"
404	depends on SPARC32
405	help
406	  This driver toggles the front-panel LED on sun4m systems
407	  in a user-specifiable manner.  Its state can be probed
408	  by reading /proc/led and its blinking mode can be changed
409	  via writes to /proc/led
410
411config SERIAL_CONSOLE
412	bool
413	depends on SPARC32
414	default y
415	---help---
416	  If you say Y here, it will be possible to use a serial port as the
417	  system console (the system console is the device which receives all
418	  kernel messages and warnings and which allows logins in single user
419	  mode). This could be useful if some terminal or printer is connected
420	  to that serial port.
421
422	  Even if you say Y here, the currently visible virtual console
423	  (/dev/tty0) will still be used as the system console by default, but
424	  you can alter that using a kernel command line option such as
425	  "console=ttyS1". (Try "man bootparam" or see the documentation of
426	  your boot loader (silo) about how to pass options to the kernel at
427	  boot time.)
428
429	  If you don't have a graphics card installed and you say Y here, the
430	  kernel will automatically use the first serial line, /dev/ttyS0, as
431	  system console.
432
433	  If unsure, say N.
434
435endmenu
436
437menu "Bus options (PCI etc.)"
438config SBUS
439	bool
440	default y
441
442config SBUSCHAR
443	bool
444	default y
445
446config SUN_LDOMS
447	bool "Sun Logical Domains support"
448	depends on SPARC64
449	help
450	  Say Y here is you want to support virtual devices via
451	  Logical Domains.
452
453config PCI
454	bool "Support for PCI and PS/2 keyboard/mouse"
455	help
456	  Find out whether your system includes a PCI bus. PCI is the name of
457	  a bus system, i.e. the way the CPU talks to the other stuff inside
458	  your box.  If you say Y here, the kernel will include drivers and
459	  infrastructure code to support PCI bus devices.
460
461	  CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
462	  CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
463	  All of these platforms are extremely obscure, so say N if unsure.
464
465config PCI_DOMAINS
466	def_bool PCI if SPARC64
467
468config PCI_SYSCALL
469	def_bool PCI
470
471source "drivers/pci/Kconfig"
472
473source "drivers/pcmcia/Kconfig"
474
475config SUN_OPENPROMFS
476	tristate "Openprom tree appears in /proc/openprom"
477	help
478	  If you say Y, the OpenPROM device tree will be available as a
479	  virtual file system, which you can mount to /proc/openprom by "mount
480	  -t openpromfs none /proc/openprom".
481
482	  To compile the /proc/openprom support as a module, choose M here: the
483	  module will be called openpromfs.
484
485	  Only choose N if you know in advance that you will not need to modify
486	  OpenPROM settings on the running system.
487
488# Makefile helpers
489config SPARC32_PCI
490	bool
491	default y
492	depends on SPARC32 && PCI
493
494config SPARC64_PCI
495	bool
496	default y
497	depends on SPARC64 && PCI
498
499endmenu
500
501menu "Executable file formats"
502
503source "fs/Kconfig.binfmt"
504
505config COMPAT
506	bool
507	depends on SPARC64
508	default y
509	select COMPAT_BINFMT_ELF
510
511config SYSVIPC_COMPAT
512	bool
513	depends on COMPAT && SYSVIPC
514	default y
515
516endmenu
517
518source "net/Kconfig"
519
520source "drivers/Kconfig"
521
522source "drivers/sbus/char/Kconfig"
523
524source "fs/Kconfig"
525
526source "arch/sparc/Kconfig.debug"
527
528source "security/Kconfig"
529
530source "crypto/Kconfig"
531
532source "lib/Kconfig"
533