1 # For a description of the syntax of this configuration file,
2 # see Documentation/kbuild/kconfig-language.txt.
5 mainmenu "Linux/SPARC Kernel Configuration"
8 bool "64-bit kernel" if ARCH = "sparc"
9 default ARCH = "sparc64"
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.
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
23 select HAVE_ARCH_KGDB if !SMP || SPARC64
24 select HAVE_ARCH_TRACEHOOK
25 select ARCH_WANT_OPTIONAL_GPIOLIB
28 select HAVE_PERF_EVENTS
29 select PERF_USE_VMALLOC
31 select HAVE_DMA_API_DEBUG
38 select ARCH_SUPPORTS_MSI
39 select HAVE_FUNCTION_TRACER
40 select HAVE_KRETPROBES
43 select HAVE_SYSCALL_WRAPPERS
44 select HAVE_DYNAMIC_FTRACE
45 select HAVE_FTRACE_MCOUNT_RECORD
46 select USE_GENERIC_SMP_HELPERS if SMP
50 select RTC_DRV_STARFIRE
51 select HAVE_PERF_EVENTS
52 select PERF_USE_VMALLOC
56 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
57 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
59 # CONFIG_BITS can be used at source level to get 32/64 bits
69 config GENERIC_CMOS_UPDATE
73 config GENERIC_CLOCKEVENTS
85 config STACKTRACE_SUPPORT
89 config LOCKDEP_SUPPORT
93 config HAVE_LATENCYTOP_SUPPORT
101 config HAVE_SETUP_PER_CPU_AREA
102 def_bool y if SPARC64
104 config NEED_PER_CPU_EMBED_FIRST_CHUNK
105 def_bool y if SPARC64
107 config NEED_PER_CPU_PAGE_FIRST_CHUNK
108 def_bool y if SPARC64
110 config GENERIC_HARDIRQS_NO__DO_IRQ
112 def_bool y if SPARC64
126 config GENERIC_ISA_DMA
133 Generic GPIO API support
135 config ARCH_NO_VIRT_TO_BUS
141 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
142 def_bool y if SPARC64
144 source "init/Kconfig"
146 source "kernel/Kconfig.freezer"
148 menu "Processor type and features"
151 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
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
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.
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.
167 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
168 available at <http://www.tldp.org/docs.html#howto>.
170 If you don't know what to do here, say N.
173 int "Maximum number of CPUs"
175 range 2 32 if SPARC32
176 range 2 1024 if SPARC64
177 default 32 if SPARC32
178 default 64 if SPARC64
180 source kernel/Kconfig.hz
182 config RWSEM_GENERIC_SPINLOCK
186 config RWSEM_XCHGADD_ALGORITHM
190 config GENERIC_FIND_NEXT_BIT
194 config GENERIC_HWEIGHT
196 default y if !ULTRA_HAS_POPULATION_COUNT
198 config GENERIC_CALIBRATE_DELAY
202 config ARCH_MAY_HAVE_PC_FDC
206 config EMULATED_CMPXCHG
210 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
211 is emulated, and therefore it is not completely atomic.
217 depends on SPARC32 && SMP
222 depends on SPARC64 && SMP
225 prompt "Kernel page size" if SPARC64
226 default SPARC64_PAGE_SIZE_8KB
228 config SPARC64_PAGE_SIZE_8KB
231 This lets you select the page size of the kernel.
233 8KB and 64KB work quite well, since SPARC ELF sections
234 provide for up to 64KB alignment.
236 If you don't know what to do, choose 8KB.
238 config SPARC64_PAGE_SIZE_64KB
244 bool "Enable seccomp to safely compute untrusted bytecode"
245 depends on SPARC64 && PROC_FS
248 This kernel feature is useful for number crunching applications
249 that may need to compute untrusted bytecode during their
250 execution. By using pipes or other transports made available to
251 the process as file descriptors supporting the read/write
252 syscalls, it's possible to isolate those applications in
253 their own address space using seccomp. Once seccomp is
254 enabled via /proc/<pid>/seccomp, it cannot be disabled
255 and the task is only allowed to execute a few safe syscalls
256 defined by each seccomp mode.
258 If unsure, say Y. Only embedded should say N here.
261 bool "Support for hot-pluggable CPUs"
262 depends on SPARC64 && SMP
265 Say Y here to experiment with turning CPUs off and on. CPUs
266 can be controlled through /sys/devices/system/cpu/cpu#.
267 Say N if you want to disable CPU hotplug.
269 config GENERIC_HARDIRQS
273 source "kernel/time/Kconfig"
276 source "drivers/cpufreq/Kconfig"
279 tristate "UltraSPARC-III CPU Frequency driver"
281 select CPU_FREQ_TABLE
283 This adds the CPUFreq driver for UltraSPARC-III processors.
285 For details, take a look at <file:Documentation/cpu-freq>.
290 tristate "UltraSPARC-IIe CPU Frequency driver"
292 select CPU_FREQ_TABLE
294 This adds the CPUFreq driver for UltraSPARC-IIe processors.
296 For details, take a look at <file:Documentation/cpu-freq>.
303 tristate "UltraSPARC-III Memory Controller driver"
307 This adds a driver for the UltraSPARC-III memory controller.
308 Loading this driver allows exact mnemonic strings to be
309 printed in the event of a memory error, so that the faulty DIMM
310 on the motherboard can be matched to the error.
312 If in doubt, say Y, as this information can be very useful.
314 # Global things across all Sun machines.
315 config GENERIC_LOCKBREAK
318 depends on SPARC64 && SMP && PREEMPT
321 prompt "SPARC64 Huge TLB Page Size"
322 depends on SPARC64 && HUGETLB_PAGE
323 default HUGETLB_PAGE_SIZE_4MB
325 config HUGETLB_PAGE_SIZE_4MB
328 config HUGETLB_PAGE_SIZE_512K
331 config HUGETLB_PAGE_SIZE_64K
332 depends on !SPARC64_PAGE_SIZE_64KB
339 depends on SPARC64 && SMP
344 depends on NEED_MULTIPLE_NODES
346 # Some NUMA nodes have memory ranges that span
347 # other nodes. Even though a pfn is valid and
348 # between a node's start and end pfns, it may not
349 # reside on that node. See memmap_init_zone()
351 config NODES_SPAN_OTHER_NODES
353 depends on NEED_MULTIPLE_NODES
355 config ARCH_POPULATES_NODE_MAP
356 def_bool y if SPARC64
358 config ARCH_SELECT_MEMORY_MODEL
359 def_bool y if SPARC64
361 config ARCH_SPARSEMEM_ENABLE
362 def_bool y if SPARC64
363 select SPARSEMEM_VMEMMAP_ENABLE
365 config ARCH_SPARSEMEM_DEFAULT
366 def_bool y if SPARC64
371 bool "SMT (Hyperthreading) scheduler support"
372 depends on SPARC64 && SMP
375 SMT scheduler support improves the CPU scheduler's decision making
376 when dealing with SPARC cpus at a cost of slightly increased overhead
377 in some places. If unsure say N here.
380 bool "Multi-core scheduler support"
381 depends on SPARC64 && SMP
384 Multi-core scheduler support improves the CPU scheduler's decision
385 making when dealing with multi-core CPU chips at a cost of slightly
386 increased overhead in some places. If unsure say N here.
389 source "kernel/Kconfig.preempt"
393 bool "Default bootloader kernel arguments"
397 string "Initial kernel command string"
398 depends on CMDLINE_BOOL
399 default "console=ttyS0,9600 root=/dev/sda1"
401 Say Y here if you want to be able to pass default arguments to
402 the kernel. This will be overridden by the bootloader, if you
403 use one (such as SILO). This is most useful if you want to boot
404 a kernel from TFTP, and want default options to be available
405 with having them passed on the command line.
407 NOTE: This option WILL override the PROM bootargs setting!
413 Enable power management and CPU standby features on supported
417 tristate "Sun4m LED driver"
420 This driver toggles the front-panel LED on sun4m systems
421 in a user-specifiable manner. Its state can be probed
422 by reading /proc/led and its blinking mode can be changed
423 via writes to /proc/led
425 config SERIAL_CONSOLE
430 If you say Y here, it will be possible to use a serial port as the
431 system console (the system console is the device which receives all
432 kernel messages and warnings and which allows logins in single user
433 mode). This could be useful if some terminal or printer is connected
436 Even if you say Y here, the currently visible virtual console
437 (/dev/tty0) will still be used as the system console by default, but
438 you can alter that using a kernel command line option such as
439 "console=ttyS1". (Try "man bootparam" or see the documentation of
440 your boot loader (silo) about how to pass options to the kernel at
443 If you don't have a graphics card installed and you say Y here, the
444 kernel will automatically use the first serial line, /dev/ttyS0, as
450 bool "Sparc Leon processor family"
453 If you say Y here if you are running on a SPARC-LEON processor.
454 The LEON processor is a synthesizable VHDL model of the
455 SPARC-v8 standard. LEON is part of the GRLIB collection of
456 IP cores that are distributed under GPL. GRLIB can be downloaded
457 from www.gaisler.com. You can download a sparc-linux cross-compilation
458 toolchain at www.gaisler.com.
462 menu "Bus options (PCI etc.)"
472 bool "Sun Logical Domains support"
475 Say Y here is you want to support virtual devices via
479 bool "Support for PCI and PS/2 keyboard/mouse"
481 Find out whether your system includes a PCI bus. PCI is the name of
482 a bus system, i.e. the way the CPU talks to the other stuff inside
483 your box. If you say Y here, the kernel will include drivers and
484 infrastructure code to support PCI bus devices.
486 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
487 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
488 All of these platforms are extremely obscure, so say N if unsure.
491 def_bool PCI if SPARC64
496 source "drivers/pci/Kconfig"
498 source "drivers/pcmcia/Kconfig"
500 config SUN_OPENPROMFS
501 tristate "Openprom tree appears in /proc/openprom"
503 If you say Y, the OpenPROM device tree will be available as a
504 virtual file system, which you can mount to /proc/openprom by "mount
505 -t openpromfs none /proc/openprom".
507 To compile the /proc/openprom support as a module, choose M here: the
508 module will be called openpromfs.
510 Only choose N if you know in advance that you will not need to modify
511 OpenPROM settings on the running system.
517 depends on SPARC32 && PCI
522 depends on SPARC64 && PCI
526 menu "Executable file formats"
528 source "fs/Kconfig.binfmt"
534 select COMPAT_BINFMT_ELF
536 config SYSVIPC_COMPAT
538 depends on COMPAT && SYSVIPC
545 source "drivers/Kconfig"
547 source "drivers/sbus/char/Kconfig"
551 source "arch/sparc/Kconfig.debug"
553 source "security/Kconfig"
555 source "crypto/Kconfig"