Root/arch/sparc/Kconfig

1config 64BIT
2    bool "64-bit kernel" if ARCH = "sparc"
3    default ARCH = "sparc64"
4    help
5      SPARC is a family of RISC microprocessors designed and marketed by
6      Sun Microsystems, incorporated. They are very widely found in Sun
7      workstations and clones.
8
9      Say yes to build a 64-bit kernel - formerly known as sparc64
10      Say no to build a 32-bit kernel - formerly known as sparc
11
12config SPARC
13    bool
14    default y
15    select OF
16    select OF_PROMTREE
17    select HAVE_IDE
18    select HAVE_OPROFILE
19    select HAVE_ARCH_KGDB if !SMP || SPARC64
20    select HAVE_ARCH_TRACEHOOK
21    select ARCH_WANT_OPTIONAL_GPIOLIB
22    select RTC_CLASS
23    select RTC_DRV_M48T59
24    select HAVE_IRQ_WORK
25    select HAVE_DMA_ATTRS
26    select HAVE_DMA_API_DEBUG
27    select HAVE_ARCH_JUMP_LABEL
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_FUNCTION_GRAPH_TRACER
37    select HAVE_FUNCTION_GRAPH_FP_TEST
38    select HAVE_FUNCTION_TRACE_MCOUNT_TEST
39    select HAVE_KRETPROBES
40    select HAVE_KPROBES
41    select HAVE_MEMBLOCK
42    select HAVE_SYSCALL_WRAPPERS
43    select HAVE_DYNAMIC_FTRACE
44    select HAVE_FTRACE_MCOUNT_RECORD
45    select HAVE_SYSCALL_TRACEPOINTS
46    select USE_GENERIC_SMP_HELPERS if SMP
47    select RTC_DRV_CMOS
48    select RTC_DRV_BQ4802
49    select RTC_DRV_SUN4V
50    select RTC_DRV_STARFIRE
51    select HAVE_PERF_EVENTS
52    select PERF_USE_VMALLOC
53    select HAVE_GENERIC_HARDIRQS
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 ARCH_USES_GETTIMEOFFSET
67    bool
68    default y if SPARC32
69
70config GENERIC_CMOS_UPDATE
71    bool
72    default y
73
74config GENERIC_CLOCKEVENTS
75    bool
76    default y if SPARC64
77
78config IOMMU_HELPER
79    bool
80    default y if SPARC64
81
82config QUICKLIST
83    bool
84    default y if SPARC64
85
86config STACKTRACE_SUPPORT
87    bool
88    default y if SPARC64
89
90config LOCKDEP_SUPPORT
91    bool
92    default y if SPARC64
93
94config HAVE_LATENCYTOP_SUPPORT
95    bool
96    default y if SPARC64
97
98config AUDIT_ARCH
99    bool
100    default y
101
102config HAVE_SETUP_PER_CPU_AREA
103    def_bool y if SPARC64
104
105config NEED_PER_CPU_EMBED_FIRST_CHUNK
106    def_bool y if SPARC64
107
108config NEED_PER_CPU_PAGE_FIRST_CHUNK
109    def_bool y if SPARC64
110
111config MMU
112    bool
113    default y
114
115config HIGHMEM
116    bool
117    default y if SPARC32
118
119config ZONE_DMA
120    bool
121    default y if SPARC32
122
123config NEED_DMA_MAP_STATE
124    def_bool y
125
126config NEED_SG_DMA_LENGTH
127    def_bool y
128
129config GENERIC_ISA_DMA
130    bool
131    default y if SPARC32
132
133config GENERIC_GPIO
134    bool
135    help
136      Generic GPIO API support
137
138config ARCH_NO_VIRT_TO_BUS
139    def_bool y
140
141config ARCH_SUPPORTS_DEBUG_PAGEALLOC
142    def_bool y if SPARC64
143
144source "init/Kconfig"
145
146source "kernel/Kconfig.freezer"
147
148menu "Processor type and features"
149
150config SMP
151    bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
152    ---help---
153      This enables support for systems with more than one CPU. If you have
154      a system with only one CPU, say N. If you have a system with more
155      than one CPU, say Y.
156
157      If you say N here, the kernel will run on single and multiprocessor
158      machines, but will use only one CPU of a multiprocessor machine. If
159      you say Y here, the kernel will run on many, but not all,
160      singleprocessor machines. On a singleprocessor machine, the kernel
161      will run faster if you say N here.
162
163      People using multiprocessor machines who say Y here should also say
164      Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
165      Management" code will be disabled if you say Y here.
166
167      See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
168      available at <http://www.tldp.org/docs.html#howto>.
169
170      If you don't know what to do here, say N.
171
172config NR_CPUS
173    int "Maximum number of CPUs"
174    depends on SMP
175    range 2 32 if SPARC32
176    range 2 1024 if SPARC64
177    default 32 if SPARC32
178    default 64 if SPARC64
179
180source kernel/Kconfig.hz
181
182config RWSEM_GENERIC_SPINLOCK
183    bool
184    default y if SPARC32
185
186config RWSEM_XCHGADD_ALGORITHM
187    bool
188    default y if SPARC64
189
190config GENERIC_FIND_NEXT_BIT
191    bool
192    default y
193
194config GENERIC_HWEIGHT
195    bool
196    default y if !ULTRA_HAS_POPULATION_COUNT
197
198config GENERIC_CALIBRATE_DELAY
199    bool
200    default y
201
202config ARCH_MAY_HAVE_PC_FDC
203    bool
204    default y
205
206config EMULATED_CMPXCHG
207    bool
208    default y if SPARC32
209    help
210      Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
211      is emulated, and therefore it is not completely atomic.
212
213# Makefile helpers
214config SPARC32_SMP
215    bool
216    default y
217    depends on SPARC32 && SMP
218
219config SPARC64_SMP
220    bool
221    default y
222    depends on SPARC64 && SMP
223
224config EARLYFB
225    bool "Support for early boot text console"
226    default y
227    depends on SPARC64
228    help
229      Say Y here to enable a faster early framebuffer boot console.
230
231choice
232    prompt "Kernel page size" if SPARC64
233    default SPARC64_PAGE_SIZE_8KB
234
235config SPARC64_PAGE_SIZE_8KB
236    bool "8KB"
237    help
238      This lets you select the page size of the kernel.
239
240      8KB and 64KB work quite well, since SPARC ELF sections
241      provide for up to 64KB alignment.
242
243      If you don't know what to do, choose 8KB.
244
245config SPARC64_PAGE_SIZE_64KB
246    bool "64KB"
247
248endchoice
249
250config SECCOMP
251    bool "Enable seccomp to safely compute untrusted bytecode"
252    depends on SPARC64 && PROC_FS
253    default y
254    help
255      This kernel feature is useful for number crunching applications
256      that may need to compute untrusted bytecode during their
257      execution. By using pipes or other transports made available to
258      the process as file descriptors supporting the read/write
259      syscalls, it's possible to isolate those applications in
260      their own address space using seccomp. Once seccomp is
261      enabled via /proc/<pid>/seccomp, it cannot be disabled
262      and the task is only allowed to execute a few safe syscalls
263      defined by each seccomp mode.
264
265      If unsure, say Y. Only embedded should say N here.
266
267config HOTPLUG_CPU
268    bool "Support for hot-pluggable CPUs"
269    depends on SPARC64 && SMP
270    select HOTPLUG
271    help
272      Say Y here to experiment with turning CPUs off and on. CPUs
273      can be controlled through /sys/devices/system/cpu/cpu#.
274      Say N if you want to disable CPU hotplug.
275
276source "kernel/time/Kconfig"
277
278if SPARC64
279source "drivers/cpufreq/Kconfig"
280
281config US3_FREQ
282    tristate "UltraSPARC-III CPU Frequency driver"
283    depends on CPU_FREQ
284    select CPU_FREQ_TABLE
285    help
286      This adds the CPUFreq driver for UltraSPARC-III processors.
287
288      For details, take a look at <file:Documentation/cpu-freq>.
289
290      If in doubt, say N.
291
292config US2E_FREQ
293    tristate "UltraSPARC-IIe CPU Frequency driver"
294    depends on CPU_FREQ
295    select CPU_FREQ_TABLE
296    help
297      This adds the CPUFreq driver for UltraSPARC-IIe processors.
298
299      For details, take a look at <file:Documentation/cpu-freq>.
300
301      If in doubt, say N.
302
303endif
304
305config US3_MC
306    tristate "UltraSPARC-III Memory Controller driver"
307    depends on SPARC64
308    default y
309    help
310      This adds a driver for the UltraSPARC-III memory controller.
311      Loading this driver allows exact mnemonic strings to be
312      printed in the event of a memory error, so that the faulty DIMM
313      on the motherboard can be matched to the error.
314
315      If in doubt, say Y, as this information can be very useful.
316
317# Global things across all Sun machines.
318config GENERIC_LOCKBREAK
319    bool
320    default y
321    depends on SPARC64 && SMP && PREEMPT
322
323choice
324    prompt "SPARC64 Huge TLB Page Size"
325    depends on SPARC64 && HUGETLB_PAGE
326    default HUGETLB_PAGE_SIZE_4MB
327
328config HUGETLB_PAGE_SIZE_4MB
329    bool "4MB"
330
331config HUGETLB_PAGE_SIZE_512K
332    bool "512K"
333
334config HUGETLB_PAGE_SIZE_64K
335    depends on !SPARC64_PAGE_SIZE_64KB
336    bool "64K"
337
338endchoice
339
340config NUMA
341    bool "NUMA support"
342    depends on SPARC64 && SMP
343
344config NODES_SHIFT
345    int
346    default "4"
347    depends on NEED_MULTIPLE_NODES
348
349# Some NUMA nodes have memory ranges that span
350# other nodes. Even though a pfn is valid and
351# between a node's start and end pfns, it may not
352# reside on that node. See memmap_init_zone()
353# for details.
354config NODES_SPAN_OTHER_NODES
355    def_bool y
356    depends on NEED_MULTIPLE_NODES
357
358config ARCH_POPULATES_NODE_MAP
359    def_bool y if SPARC64
360
361config ARCH_SELECT_MEMORY_MODEL
362    def_bool y if SPARC64
363
364config ARCH_SPARSEMEM_ENABLE
365    def_bool y if SPARC64
366    select SPARSEMEM_VMEMMAP_ENABLE
367
368config ARCH_SPARSEMEM_DEFAULT
369    def_bool y if SPARC64
370
371source "mm/Kconfig"
372
373config SCHED_SMT
374    bool "SMT (Hyperthreading) scheduler support"
375    depends on SPARC64 && SMP
376    default y
377    help
378      SMT scheduler support improves the CPU scheduler's decision making
379      when dealing with SPARC cpus at a cost of slightly increased overhead
380      in some places. If unsure say N here.
381
382config SCHED_MC
383    bool "Multi-core scheduler support"
384    depends on SPARC64 && SMP
385    default y
386    help
387      Multi-core scheduler support improves the CPU scheduler's decision
388      making when dealing with multi-core CPU chips at a cost of slightly
389      increased overhead in some places. If unsure say N here.
390
391if SPARC64
392source "kernel/Kconfig.preempt"
393endif
394
395config CMDLINE_BOOL
396    bool "Default bootloader kernel arguments"
397    depends on SPARC64
398
399config CMDLINE
400    string "Initial kernel command string"
401    depends on CMDLINE_BOOL
402    default "console=ttyS0,9600 root=/dev/sda1"
403    help
404      Say Y here if you want to be able to pass default arguments to
405      the kernel. This will be overridden by the bootloader, if you
406      use one (such as SILO). This is most useful if you want to boot
407      a kernel from TFTP, and want default options to be available
408      with having them passed on the command line.
409
410      NOTE: This option WILL override the PROM bootargs setting!
411
412config SUN_PM
413    bool
414    default y if SPARC32
415    help
416      Enable power management and CPU standby features on supported
417      SPARC platforms.
418
419config SPARC_LED
420    tristate "Sun4m LED driver"
421    depends on SPARC32
422    help
423      This driver toggles the front-panel LED on sun4m systems
424      in a user-specifiable manner. Its state can be probed
425      by reading /proc/led and its blinking mode can be changed
426      via writes to /proc/led
427
428config SERIAL_CONSOLE
429    bool
430    depends on SPARC32
431    default y
432    ---help---
433      If you say Y here, it will be possible to use a serial port as the
434      system console (the system console is the device which receives all
435      kernel messages and warnings and which allows logins in single user
436      mode). This could be useful if some terminal or printer is connected
437      to that serial port.
438
439      Even if you say Y here, the currently visible virtual console
440      (/dev/tty0) will still be used as the system console by default, but
441      you can alter that using a kernel command line option such as
442      "console=ttyS1". (Try "man bootparam" or see the documentation of
443      your boot loader (silo) about how to pass options to the kernel at
444      boot time.)
445
446      If you don't have a graphics card installed and you say Y here, the
447      kernel will automatically use the first serial line, /dev/ttyS0, as
448      system console.
449
450      If unsure, say N.
451
452config SPARC_LEON
453    bool "Sparc Leon processor family"
454    depends on SPARC32
455    ---help---
456      If you say Y here if you are running on a SPARC-LEON processor.
457      The LEON processor is a synthesizable VHDL model of the
458      SPARC-v8 standard. LEON is part of the GRLIB collection of
459      IP cores that are distributed under GPL. GRLIB can be downloaded
460      from www.gaisler.com. You can download a sparc-linux cross-compilation
461      toolchain at www.gaisler.com.
462
463endmenu
464
465menu "Bus options (PCI etc.)"
466config SBUS
467    bool
468    default y
469
470config SBUSCHAR
471    bool
472    default y
473
474config SUN_LDOMS
475    bool "Sun Logical Domains support"
476    depends on SPARC64
477    help
478      Say Y here is you want to support virtual devices via
479      Logical Domains.
480
481config PCI
482    bool "Support for PCI and PS/2 keyboard/mouse"
483    help
484      Find out whether your system includes a PCI bus. PCI is the name of
485      a bus system, i.e. the way the CPU talks to the other stuff inside
486      your box. If you say Y here, the kernel will include drivers and
487      infrastructure code to support PCI bus devices.
488
489      CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
490      CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
491      All of these platforms are extremely obscure, so say N if unsure.
492
493config PCI_DOMAINS
494    def_bool PCI if SPARC64
495
496config PCI_SYSCALL
497    def_bool PCI
498
499source "drivers/pci/Kconfig"
500
501source "drivers/pcmcia/Kconfig"
502
503config SUN_OPENPROMFS
504    tristate "Openprom tree appears in /proc/openprom"
505    help
506      If you say Y, the OpenPROM device tree will be available as a
507      virtual file system, which you can mount to /proc/openprom by "mount
508      -t openpromfs none /proc/openprom".
509
510      To compile the /proc/openprom support as a module, choose M here: the
511      module will be called openpromfs.
512
513      Only choose N if you know in advance that you will not need to modify
514      OpenPROM settings on the running system.
515
516# Makefile helpers
517config SPARC32_PCI
518    bool
519    default y
520    depends on SPARC32 && PCI
521
522config SPARC64_PCI
523    bool
524    default y
525    depends on SPARC64 && PCI
526
527endmenu
528
529menu "Executable file formats"
530
531source "fs/Kconfig.binfmt"
532
533config COMPAT
534    bool
535    depends on SPARC64
536    default y
537    select COMPAT_BINFMT_ELF
538
539config SYSVIPC_COMPAT
540    bool
541    depends on COMPAT && SYSVIPC
542    default y
543
544endmenu
545
546source "net/Kconfig"
547
548source "drivers/Kconfig"
549
550source "drivers/sbus/char/Kconfig"
551
552source "fs/Kconfig"
553
554source "arch/sparc/Kconfig.debug"
555
556source "security/Kconfig"
557
558source "crypto/Kconfig"
559
560source "lib/Kconfig"
561

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