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
29 select HAVE_DMA_API_DEBUG
36 select ARCH_SUPPORTS_MSI
37 select HAVE_FUNCTION_TRACER
38 select HAVE_KRETPROBES
41 select HAVE_SYSCALL_WRAPPERS
42 select HAVE_DYNAMIC_FTRACE
43 select HAVE_FTRACE_MCOUNT_RECORD
44 select USE_GENERIC_SMP_HELPERS if SMP
48 select RTC_DRV_STARFIRE
52 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
53 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
55 # CONFIG_BITS can be used at source level to get 32/64 bits
65 config GENERIC_CMOS_UPDATE
69 config GENERIC_CLOCKEVENTS
81 config STACKTRACE_SUPPORT
85 config LOCKDEP_SUPPORT
89 config HAVE_LATENCYTOP_SUPPORT
97 config HAVE_SETUP_PER_CPU_AREA
100 config HAVE_DYNAMIC_PER_CPU_AREA
101 def_bool y if SPARC64
103 config GENERIC_HARDIRQS_NO__DO_IRQ
105 def_bool y if SPARC64
119 config GENERIC_ISA_DMA
126 Generic GPIO API support
128 config ARCH_NO_VIRT_TO_BUS
134 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
135 def_bool y if SPARC64
137 source "init/Kconfig"
139 source "kernel/Kconfig.freezer"
141 menu "Processor type and features"
144 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
146 This enables support for systems with more than one CPU. If you have
147 a system with only one CPU, say N. If you have a system with more
150 If you say N here, the kernel will run on single and multiprocessor
151 machines, but will use only one CPU of a multiprocessor machine. If
152 you say Y here, the kernel will run on many, but not all,
153 singleprocessor machines. On a singleprocessor machine, the kernel
154 will run faster if you say N here.
156 People using multiprocessor machines who say Y here should also say
157 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
158 Management" code will be disabled if you say Y here.
160 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
161 available at <http://www.tldp.org/docs.html#howto>.
163 If you don't know what to do here, say N.
166 int "Maximum number of CPUs"
168 range 2 32 if SPARC32
169 range 2 1024 if SPARC64
170 default 32 if SPARC32
171 default 64 if SPARC64
173 source kernel/Kconfig.hz
175 config RWSEM_GENERIC_SPINLOCK
179 config RWSEM_XCHGADD_ALGORITHM
183 config GENERIC_FIND_NEXT_BIT
187 config GENERIC_HWEIGHT
189 default y if !ULTRA_HAS_POPULATION_COUNT
191 config GENERIC_CALIBRATE_DELAY
195 config ARCH_MAY_HAVE_PC_FDC
199 config EMULATED_CMPXCHG
203 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
204 is emulated, and therefore it is not completely atomic.
210 depends on SPARC32 && SMP
215 depends on SPARC64 && SMP
218 prompt "Kernel page size" if SPARC64
219 default SPARC64_PAGE_SIZE_8KB
221 config SPARC64_PAGE_SIZE_8KB
224 This lets you select the page size of the kernel.
226 8KB and 64KB work quite well, since SPARC ELF sections
227 provide for up to 64KB alignment.
229 If you don't know what to do, choose 8KB.
231 config SPARC64_PAGE_SIZE_64KB
237 bool "Enable seccomp to safely compute untrusted bytecode"
238 depends on SPARC64 && PROC_FS
241 This kernel feature is useful for number crunching applications
242 that may need to compute untrusted bytecode during their
243 execution. By using pipes or other transports made available to
244 the process as file descriptors supporting the read/write
245 syscalls, it's possible to isolate those applications in
246 their own address space using seccomp. Once seccomp is
247 enabled via /proc/<pid>/seccomp, it cannot be disabled
248 and the task is only allowed to execute a few safe syscalls
249 defined by each seccomp mode.
251 If unsure, say Y. Only embedded should say N here.
254 bool "Support for hot-pluggable CPUs"
255 depends on SPARC64 && SMP
258 Say Y here to experiment with turning CPUs off and on. CPUs
259 can be controlled through /sys/devices/system/cpu/cpu#.
260 Say N if you want to disable CPU hotplug.
262 config GENERIC_HARDIRQS
266 source "kernel/time/Kconfig"
269 source "drivers/cpufreq/Kconfig"
272 tristate "UltraSPARC-III CPU Frequency driver"
274 select CPU_FREQ_TABLE
276 This adds the CPUFreq driver for UltraSPARC-III processors.
278 For details, take a look at <file:Documentation/cpu-freq>.
283 tristate "UltraSPARC-IIe CPU Frequency driver"
285 select CPU_FREQ_TABLE
287 This adds the CPUFreq driver for UltraSPARC-IIe processors.
289 For details, take a look at <file:Documentation/cpu-freq>.
296 tristate "UltraSPARC-III Memory Controller driver"
300 This adds a driver for the UltraSPARC-III memory controller.
301 Loading this driver allows exact mnemonic strings to be
302 printed in the event of a memory error, so that the faulty DIMM
303 on the motherboard can be matched to the error.
305 If in doubt, say Y, as this information can be very useful.
307 # Global things across all Sun machines.
308 config GENERIC_LOCKBREAK
311 depends on SPARC64 && SMP && PREEMPT
314 prompt "SPARC64 Huge TLB Page Size"
315 depends on SPARC64 && HUGETLB_PAGE
316 default HUGETLB_PAGE_SIZE_4MB
318 config HUGETLB_PAGE_SIZE_4MB
321 config HUGETLB_PAGE_SIZE_512K
324 config HUGETLB_PAGE_SIZE_64K
325 depends on !SPARC64_PAGE_SIZE_64KB
332 depends on SPARC64 && SMP
337 depends on NEED_MULTIPLE_NODES
339 # Some NUMA nodes have memory ranges that span
340 # other nodes. Even though a pfn is valid and
341 # between a node's start and end pfns, it may not
342 # reside on that node. See memmap_init_zone()
344 config NODES_SPAN_OTHER_NODES
346 depends on NEED_MULTIPLE_NODES
348 config ARCH_POPULATES_NODE_MAP
349 def_bool y if SPARC64
351 config ARCH_SELECT_MEMORY_MODEL
352 def_bool y if SPARC64
354 config ARCH_SPARSEMEM_ENABLE
355 def_bool y if SPARC64
356 select SPARSEMEM_VMEMMAP_ENABLE
358 config ARCH_SPARSEMEM_DEFAULT
359 def_bool y if SPARC64
364 bool "SMT (Hyperthreading) scheduler support"
365 depends on SPARC64 && SMP
368 SMT scheduler support improves the CPU scheduler's decision making
369 when dealing with SPARC cpus at a cost of slightly increased overhead
370 in some places. If unsure say N here.
373 bool "Multi-core scheduler support"
374 depends on SPARC64 && SMP
377 Multi-core scheduler support improves the CPU scheduler's decision
378 making when dealing with multi-core CPU chips at a cost of slightly
379 increased overhead in some places. If unsure say N here.
382 source "kernel/Kconfig.preempt"
386 bool "Default bootloader kernel arguments"
390 string "Initial kernel command string"
391 depends on CMDLINE_BOOL
392 default "console=ttyS0,9600 root=/dev/sda1"
394 Say Y here if you want to be able to pass default arguments to
395 the kernel. This will be overridden by the bootloader, if you
396 use one (such as SILO). This is most useful if you want to boot
397 a kernel from TFTP, and want default options to be available
398 with having them passed on the command line.
400 NOTE: This option WILL override the PROM bootargs setting!
406 Enable power management and CPU standby features on supported
410 tristate "Sun4m LED driver"
413 This driver toggles the front-panel LED on sun4m systems
414 in a user-specifiable manner. Its state can be probed
415 by reading /proc/led and its blinking mode can be changed
416 via writes to /proc/led
418 config SERIAL_CONSOLE
423 If you say Y here, it will be possible to use a serial port as the
424 system console (the system console is the device which receives all
425 kernel messages and warnings and which allows logins in single user
426 mode). This could be useful if some terminal or printer is connected
429 Even if you say Y here, the currently visible virtual console
430 (/dev/tty0) will still be used as the system console by default, but
431 you can alter that using a kernel command line option such as
432 "console=ttyS1". (Try "man bootparam" or see the documentation of
433 your boot loader (silo) about how to pass options to the kernel at
436 If you don't have a graphics card installed and you say Y here, the
437 kernel will automatically use the first serial line, /dev/ttyS0, as
444 menu "Bus options (PCI etc.)"
454 bool "Sun Logical Domains support"
457 Say Y here is you want to support virtual devices via
461 bool "Support for PCI and PS/2 keyboard/mouse"
463 Find out whether your system includes a PCI bus. PCI is the name of
464 a bus system, i.e. the way the CPU talks to the other stuff inside
465 your box. If you say Y here, the kernel will include drivers and
466 infrastructure code to support PCI bus devices.
468 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
469 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
470 All of these platforms are extremely obscure, so say N if unsure.
473 def_bool PCI if SPARC64
478 source "drivers/pci/Kconfig"
480 source "drivers/pcmcia/Kconfig"
482 config SUN_OPENPROMFS
483 tristate "Openprom tree appears in /proc/openprom"
485 If you say Y, the OpenPROM device tree will be available as a
486 virtual file system, which you can mount to /proc/openprom by "mount
487 -t openpromfs none /proc/openprom".
489 To compile the /proc/openprom support as a module, choose M here: the
490 module will be called openpromfs.
492 Only choose N if you know in advance that you will not need to modify
493 OpenPROM settings on the running system.
499 depends on SPARC32 && PCI
504 depends on SPARC64 && PCI
508 menu "Executable file formats"
510 source "fs/Kconfig.binfmt"
516 select COMPAT_BINFMT_ELF
518 config SYSVIPC_COMPAT
520 depends on COMPAT && SYSVIPC
527 source "drivers/Kconfig"
529 source "drivers/sbus/char/Kconfig"
533 source "arch/sparc/Kconfig.debug"
535 source "security/Kconfig"
537 source "crypto/Kconfig"