xref: /openbmc/linux/arch/sparc/Kconfig (revision b6dcefde)
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	select HAVE_PERF_EVENTS
29	select PERF_USE_VMALLOC
30	select HAVE_DMA_ATTRS
31	select HAVE_DMA_API_DEBUG
32
33config SPARC32
34	def_bool !64BIT
35
36config SPARC64
37	def_bool 64BIT
38	select ARCH_SUPPORTS_MSI
39	select HAVE_FUNCTION_TRACER
40	select HAVE_KRETPROBES
41	select HAVE_KPROBES
42	select HAVE_LMB
43	select HAVE_SYSCALL_WRAPPERS
44	select HAVE_DYNAMIC_FTRACE
45	select HAVE_FTRACE_MCOUNT_RECORD
46	select HAVE_SYSCALL_TRACEPOINTS
47	select USE_GENERIC_SMP_HELPERS if SMP
48	select RTC_DRV_CMOS
49	select RTC_DRV_BQ4802
50	select RTC_DRV_SUN4V
51	select RTC_DRV_STARFIRE
52	select HAVE_PERF_EVENTS
53	select PERF_USE_VMALLOC
54
55config ARCH_DEFCONFIG
56	string
57	default "arch/sparc/configs/sparc32_defconfig" if SPARC32
58	default "arch/sparc/configs/sparc64_defconfig" if SPARC64
59
60# CONFIG_BITS can be used at source level to get 32/64 bits
61config BITS
62	int
63	default 32 if SPARC32
64	default 64 if SPARC64
65
66config GENERIC_TIME
67	def_bool y
68
69config ARCH_USES_GETTIMEOFFSET
70	bool
71	default y if SPARC32
72
73config GENERIC_CMOS_UPDATE
74	bool
75	default y if SPARC64
76
77config GENERIC_CLOCKEVENTS
78	bool
79	default y if SPARC64
80
81config IOMMU_HELPER
82	bool
83	default y if SPARC64
84
85config QUICKLIST
86	bool
87	default y if SPARC64
88
89config STACKTRACE_SUPPORT
90	bool
91	default y if SPARC64
92
93config LOCKDEP_SUPPORT
94	bool
95	default y if SPARC64
96
97config HAVE_LATENCYTOP_SUPPORT
98	bool
99	default y if SPARC64
100
101config AUDIT_ARCH
102	bool
103	default y
104
105config HAVE_SETUP_PER_CPU_AREA
106	def_bool y if SPARC64
107
108config NEED_PER_CPU_EMBED_FIRST_CHUNK
109	def_bool y if SPARC64
110
111config NEED_PER_CPU_PAGE_FIRST_CHUNK
112	def_bool y if SPARC64
113
114config GENERIC_HARDIRQS_NO__DO_IRQ
115	bool
116	def_bool y if SPARC64
117
118config MMU
119	bool
120	default y
121
122config HIGHMEM
123	bool
124	default y if SPARC32
125
126config ZONE_DMA
127	bool
128	default y if SPARC32
129
130config GENERIC_ISA_DMA
131	bool
132	default y if SPARC32
133
134config GENERIC_GPIO
135	bool
136	help
137	  Generic GPIO API support
138
139config ARCH_NO_VIRT_TO_BUS
140	def_bool y
141
142config OF
143	def_bool y
144
145config ARCH_SUPPORTS_DEBUG_PAGEALLOC
146	def_bool y if SPARC64
147
148source "init/Kconfig"
149
150source "kernel/Kconfig.freezer"
151
152menu "Processor type and features"
153
154config SMP
155	bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
156	---help---
157	  This enables support for systems with more than one CPU. If you have
158	  a system with only one CPU, say N. If you have a system with more
159	  than one CPU, say Y.
160
161	  If you say N here, the kernel will run on single and multiprocessor
162	  machines, but will use only one CPU of a multiprocessor machine. If
163	  you say Y here, the kernel will run on many, but not all,
164	  singleprocessor machines. On a singleprocessor machine, the kernel
165	  will run faster if you say N here.
166
167	  People using multiprocessor machines who say Y here should also say
168	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
169	  Management" code will be disabled if you say Y here.
170
171	  See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
172	  available at <http://www.tldp.org/docs.html#howto>.
173
174	  If you don't know what to do here, say N.
175
176config NR_CPUS
177	int "Maximum number of CPUs"
178	depends on SMP
179	range 2 32 if SPARC32
180	range 2 1024 if SPARC64
181	default 32 if SPARC32
182	default 64 if SPARC64
183
184source kernel/Kconfig.hz
185
186config RWSEM_GENERIC_SPINLOCK
187	bool
188	default y if SPARC32
189
190config RWSEM_XCHGADD_ALGORITHM
191	bool
192	default y if SPARC64
193
194config GENERIC_FIND_NEXT_BIT
195	bool
196	default y
197
198config GENERIC_HWEIGHT
199	bool
200	default y if !ULTRA_HAS_POPULATION_COUNT
201
202config GENERIC_CALIBRATE_DELAY
203	bool
204	default y
205
206config ARCH_MAY_HAVE_PC_FDC
207	bool
208	default y
209
210config EMULATED_CMPXCHG
211	bool
212	default y if SPARC32
213	help
214	  Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
215	  is emulated, and therefore it is not completely atomic.
216
217# Makefile helpers
218config SPARC32_SMP
219	bool
220	default y
221	depends on SPARC32 && SMP
222
223config SPARC64_SMP
224	bool
225	default y
226	depends on SPARC64 && SMP
227
228config EARLYFB
229	bool "Support for early boot text console"
230	default y
231	depends on SPARC64
232	help
233	  Say Y here to enable a faster early framebuffer boot console.
234
235choice
236	prompt "Kernel page size" if SPARC64
237	default SPARC64_PAGE_SIZE_8KB
238
239config SPARC64_PAGE_SIZE_8KB
240	bool "8KB"
241	help
242	  This lets you select the page size of the kernel.
243
244	  8KB and 64KB work quite well, since SPARC ELF sections
245	  provide for up to 64KB alignment.
246
247	  If you don't know what to do, choose 8KB.
248
249config SPARC64_PAGE_SIZE_64KB
250	bool "64KB"
251
252endchoice
253
254config SECCOMP
255	bool "Enable seccomp to safely compute untrusted bytecode"
256	depends on SPARC64 && PROC_FS
257	default y
258	help
259	  This kernel feature is useful for number crunching applications
260	  that may need to compute untrusted bytecode during their
261	  execution. By using pipes or other transports made available to
262	  the process as file descriptors supporting the read/write
263	  syscalls, it's possible to isolate those applications in
264	  their own address space using seccomp. Once seccomp is
265	  enabled via /proc/<pid>/seccomp, it cannot be disabled
266	  and the task is only allowed to execute a few safe syscalls
267	  defined by each seccomp mode.
268
269	  If unsure, say Y. Only embedded should say N here.
270
271config HOTPLUG_CPU
272	bool "Support for hot-pluggable CPUs"
273	depends on SPARC64 && SMP
274	select HOTPLUG
275	help
276	  Say Y here to experiment with turning CPUs off and on.  CPUs
277	  can be controlled through /sys/devices/system/cpu/cpu#.
278	  Say N if you want to disable CPU hotplug.
279
280config GENERIC_HARDIRQS
281	bool
282	default y if SPARC64
283
284source "kernel/time/Kconfig"
285
286if SPARC64
287source "drivers/cpufreq/Kconfig"
288
289config US3_FREQ
290	tristate "UltraSPARC-III CPU Frequency driver"
291	depends on CPU_FREQ
292	select CPU_FREQ_TABLE
293	help
294	  This adds the CPUFreq driver for UltraSPARC-III processors.
295
296	  For details, take a look at <file:Documentation/cpu-freq>.
297
298	  If in doubt, say N.
299
300config US2E_FREQ
301	tristate "UltraSPARC-IIe CPU Frequency driver"
302	depends on CPU_FREQ
303	select CPU_FREQ_TABLE
304	help
305	  This adds the CPUFreq driver for UltraSPARC-IIe processors.
306
307	  For details, take a look at <file:Documentation/cpu-freq>.
308
309	  If in doubt, say N.
310
311endif
312
313config US3_MC
314	tristate "UltraSPARC-III Memory Controller driver"
315	depends on SPARC64
316	default y
317	help
318	  This adds a driver for the UltraSPARC-III memory controller.
319	  Loading this driver allows exact mnemonic strings to be
320	  printed in the event of a memory error, so that the faulty DIMM
321	  on the motherboard can be matched to the error.
322
323	  If in doubt, say Y, as this information can be very useful.
324
325# Global things across all Sun machines.
326config GENERIC_LOCKBREAK
327	bool
328	default y
329	depends on SPARC64 && SMP && PREEMPT
330
331choice
332	prompt "SPARC64 Huge TLB Page Size"
333	depends on SPARC64 && HUGETLB_PAGE
334	default HUGETLB_PAGE_SIZE_4MB
335
336config HUGETLB_PAGE_SIZE_4MB
337	bool "4MB"
338
339config HUGETLB_PAGE_SIZE_512K
340	bool "512K"
341
342config HUGETLB_PAGE_SIZE_64K
343	depends on !SPARC64_PAGE_SIZE_64KB
344	bool "64K"
345
346endchoice
347
348config NUMA
349	bool "NUMA support"
350	depends on SPARC64 && SMP
351
352config NODES_SHIFT
353	int
354	default "4"
355	depends on NEED_MULTIPLE_NODES
356
357# Some NUMA nodes have memory ranges that span
358# other nodes.  Even though a pfn is valid and
359# between a node's start and end pfns, it may not
360# reside on that node.  See memmap_init_zone()
361# for details.
362config NODES_SPAN_OTHER_NODES
363	def_bool y
364	depends on NEED_MULTIPLE_NODES
365
366config ARCH_POPULATES_NODE_MAP
367	def_bool y if SPARC64
368
369config ARCH_SELECT_MEMORY_MODEL
370	def_bool y if SPARC64
371
372config ARCH_SPARSEMEM_ENABLE
373	def_bool y if SPARC64
374	select SPARSEMEM_VMEMMAP_ENABLE
375
376config ARCH_SPARSEMEM_DEFAULT
377	def_bool y if SPARC64
378
379source "mm/Kconfig"
380
381config SCHED_SMT
382	bool "SMT (Hyperthreading) scheduler support"
383	depends on SPARC64 && SMP
384	default y
385	help
386	  SMT scheduler support improves the CPU scheduler's decision making
387	  when dealing with SPARC cpus at a cost of slightly increased overhead
388	  in some places. If unsure say N here.
389
390config SCHED_MC
391	bool "Multi-core scheduler support"
392	depends on SPARC64 && SMP
393	default y
394	help
395	  Multi-core scheduler support improves the CPU scheduler's decision
396	  making when dealing with multi-core CPU chips at a cost of slightly
397	  increased overhead in some places. If unsure say N here.
398
399if SPARC64
400source "kernel/Kconfig.preempt"
401endif
402
403config CMDLINE_BOOL
404	bool "Default bootloader kernel arguments"
405	depends on SPARC64
406
407config CMDLINE
408	string "Initial kernel command string"
409	depends on CMDLINE_BOOL
410	default "console=ttyS0,9600 root=/dev/sda1"
411	help
412	  Say Y here if you want to be able to pass default arguments to
413	  the kernel. This will be overridden by the bootloader, if you
414	  use one (such as SILO). This is most useful if you want to boot
415	  a kernel from TFTP, and want default options to be available
416	  with having them passed on the command line.
417
418	  NOTE: This option WILL override the PROM bootargs setting!
419
420config SUN_PM
421	bool
422	default y if SPARC32
423	help
424	  Enable power management and CPU standby features on supported
425	  SPARC platforms.
426
427config SPARC_LED
428	tristate "Sun4m LED driver"
429	depends on SPARC32
430	help
431	  This driver toggles the front-panel LED on sun4m systems
432	  in a user-specifiable manner.  Its state can be probed
433	  by reading /proc/led and its blinking mode can be changed
434	  via writes to /proc/led
435
436config SERIAL_CONSOLE
437	bool
438	depends on SPARC32
439	default y
440	---help---
441	  If you say Y here, it will be possible to use a serial port as the
442	  system console (the system console is the device which receives all
443	  kernel messages and warnings and which allows logins in single user
444	  mode). This could be useful if some terminal or printer is connected
445	  to that serial port.
446
447	  Even if you say Y here, the currently visible virtual console
448	  (/dev/tty0) will still be used as the system console by default, but
449	  you can alter that using a kernel command line option such as
450	  "console=ttyS1". (Try "man bootparam" or see the documentation of
451	  your boot loader (silo) about how to pass options to the kernel at
452	  boot time.)
453
454	  If you don't have a graphics card installed and you say Y here, the
455	  kernel will automatically use the first serial line, /dev/ttyS0, as
456	  system console.
457
458	  If unsure, say N.
459
460config SPARC_LEON
461	bool "Sparc Leon processor family"
462	depends on SPARC32
463	---help---
464	  If you say Y here if you are running on a SPARC-LEON processor.
465	  The LEON processor is a synthesizable VHDL model of the
466	  SPARC-v8 standard. LEON is  part of the GRLIB collection of
467	  IP cores that are distributed under GPL. GRLIB can be downloaded
468	  from www.gaisler.com. You can download a sparc-linux cross-compilation
469	  toolchain at www.gaisler.com.
470
471endmenu
472
473menu "Bus options (PCI etc.)"
474config SBUS
475	bool
476	default y
477
478config SBUSCHAR
479	bool
480	default y
481
482config SUN_LDOMS
483	bool "Sun Logical Domains support"
484	depends on SPARC64
485	help
486	  Say Y here is you want to support virtual devices via
487	  Logical Domains.
488
489config PCI
490	bool "Support for PCI and PS/2 keyboard/mouse"
491	help
492	  Find out whether your system includes a PCI bus. PCI is the name of
493	  a bus system, i.e. the way the CPU talks to the other stuff inside
494	  your box.  If you say Y here, the kernel will include drivers and
495	  infrastructure code to support PCI bus devices.
496
497	  CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
498	  CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
499	  All of these platforms are extremely obscure, so say N if unsure.
500
501config PCI_DOMAINS
502	def_bool PCI if SPARC64
503
504config PCI_SYSCALL
505	def_bool PCI
506
507source "drivers/pci/Kconfig"
508
509source "drivers/pcmcia/Kconfig"
510
511config SUN_OPENPROMFS
512	tristate "Openprom tree appears in /proc/openprom"
513	help
514	  If you say Y, the OpenPROM device tree will be available as a
515	  virtual file system, which you can mount to /proc/openprom by "mount
516	  -t openpromfs none /proc/openprom".
517
518	  To compile the /proc/openprom support as a module, choose M here: the
519	  module will be called openpromfs.
520
521	  Only choose N if you know in advance that you will not need to modify
522	  OpenPROM settings on the running system.
523
524# Makefile helpers
525config SPARC32_PCI
526	bool
527	default y
528	depends on SPARC32 && PCI
529
530config SPARC64_PCI
531	bool
532	default y
533	depends on SPARC64 && PCI
534
535endmenu
536
537menu "Executable file formats"
538
539source "fs/Kconfig.binfmt"
540
541config COMPAT
542	bool
543	depends on SPARC64
544	default y
545	select COMPAT_BINFMT_ELF
546
547config SYSVIPC_COMPAT
548	bool
549	depends on COMPAT && SYSVIPC
550	default y
551
552endmenu
553
554source "net/Kconfig"
555
556source "drivers/Kconfig"
557
558source "drivers/sbus/char/Kconfig"
559
560source "fs/Kconfig"
561
562source "arch/sparc/Kconfig.debug"
563
564source "security/Kconfig"
565
566source "crypto/Kconfig"
567
568source "lib/Kconfig"
569