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
34 select ARCH_SUPPORTS_MSI
35 select HAVE_FUNCTION_TRACER
36 select HAVE_KRETPROBES
39 select HAVE_SYSCALL_WRAPPERS
40 select HAVE_DYNAMIC_FTRACE
41 select HAVE_FTRACE_MCOUNT_RECORD
42 select USE_GENERIC_SMP_HELPERS if SMP
46 select RTC_DRV_STARFIRE
50 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
51 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
53 # CONFIG_BITS can be used at source level to get 32/64 bits
63 config GENERIC_CMOS_UPDATE
67 config GENERIC_CLOCKEVENTS
79 config STACKTRACE_SUPPORT
83 config LOCKDEP_SUPPORT
87 config HAVE_LATENCYTOP_SUPPORT
95 config HAVE_SETUP_PER_CPU_AREA
98 config HAVE_DYNAMIC_PER_CPU_AREA
101 config GENERIC_HARDIRQS_NO__DO_IRQ
103 def_bool y if SPARC64
117 config GENERIC_ISA_DMA
124 Generic GPIO API support
126 config ARCH_NO_VIRT_TO_BUS
132 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
133 def_bool y if SPARC64
135 source "init/Kconfig"
137 source "kernel/Kconfig.freezer"
139 menu "Processor type and features"
142 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
144 This enables support for systems with more than one CPU. If you have
145 a system with only one CPU, say N. If you have a system with more
148 If you say N here, the kernel will run on single and multiprocessor
149 machines, but will use only one CPU of a multiprocessor machine. If
150 you say Y here, the kernel will run on many, but not all,
151 singleprocessor machines. On a singleprocessor machine, the kernel
152 will run faster if you say N here.
154 People using multiprocessor machines who say Y here should also say
155 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
156 Management" code will be disabled if you say Y here.
158 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
159 available at <http://www.tldp.org/docs.html#howto>.
161 If you don't know what to do here, say N.
164 int "Maximum number of CPUs"
166 range 2 32 if SPARC32
167 range 2 1024 if SPARC64
168 default 32 if SPARC32
169 default 64 if SPARC64
171 source kernel/Kconfig.hz
173 config RWSEM_GENERIC_SPINLOCK
177 config RWSEM_XCHGADD_ALGORITHM
181 config GENERIC_FIND_NEXT_BIT
185 config GENERIC_HWEIGHT
187 default y if !ULTRA_HAS_POPULATION_COUNT
189 config GENERIC_CALIBRATE_DELAY
193 config ARCH_MAY_HAVE_PC_FDC
197 config EMULATED_CMPXCHG
201 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
202 is emulated, and therefore it is not completely atomic.
208 depends on SPARC32 && SMP
213 depends on SPARC64 && SMP
216 prompt "Kernel page size" if SPARC64
217 default SPARC64_PAGE_SIZE_8KB
219 config SPARC64_PAGE_SIZE_8KB
222 This lets you select the page size of the kernel.
224 8KB and 64KB work quite well, since SPARC ELF sections
225 provide for up to 64KB alignment.
227 If you don't know what to do, choose 8KB.
229 config SPARC64_PAGE_SIZE_64KB
235 bool "Enable seccomp to safely compute untrusted bytecode"
236 depends on SPARC64 && PROC_FS
239 This kernel feature is useful for number crunching applications
240 that may need to compute untrusted bytecode during their
241 execution. By using pipes or other transports made available to
242 the process as file descriptors supporting the read/write
243 syscalls, it's possible to isolate those applications in
244 their own address space using seccomp. Once seccomp is
245 enabled via /proc/<pid>/seccomp, it cannot be disabled
246 and the task is only allowed to execute a few safe syscalls
247 defined by each seccomp mode.
249 If unsure, say Y. Only embedded should say N here.
252 bool "Support for hot-pluggable CPUs"
253 depends on SPARC64 && SMP
256 Say Y here to experiment with turning CPUs off and on. CPUs
257 can be controlled through /sys/devices/system/cpu/cpu#.
258 Say N if you want to disable CPU hotplug.
260 config GENERIC_HARDIRQS
264 source "kernel/time/Kconfig"
267 source "drivers/cpufreq/Kconfig"
270 tristate "UltraSPARC-III CPU Frequency driver"
272 select CPU_FREQ_TABLE
274 This adds the CPUFreq driver for UltraSPARC-III processors.
276 For details, take a look at <file:Documentation/cpu-freq>.
281 tristate "UltraSPARC-IIe CPU Frequency driver"
283 select CPU_FREQ_TABLE
285 This adds the CPUFreq driver for UltraSPARC-IIe processors.
287 For details, take a look at <file:Documentation/cpu-freq>.
294 tristate "UltraSPARC-III Memory Controller driver"
298 This adds a driver for the UltraSPARC-III memory controller.
299 Loading this driver allows exact mnemonic strings to be
300 printed in the event of a memory error, so that the faulty DIMM
301 on the motherboard can be matched to the error.
303 If in doubt, say Y, as this information can be very useful.
305 # Global things across all Sun machines.
306 config GENERIC_LOCKBREAK
309 depends on SPARC64 && SMP && PREEMPT
312 prompt "SPARC64 Huge TLB Page Size"
313 depends on SPARC64 && HUGETLB_PAGE
314 default HUGETLB_PAGE_SIZE_4MB
316 config HUGETLB_PAGE_SIZE_4MB
319 config HUGETLB_PAGE_SIZE_512K
322 config HUGETLB_PAGE_SIZE_64K
323 depends on !SPARC64_PAGE_SIZE_64KB
330 depends on SPARC64 && SMP
335 depends on NEED_MULTIPLE_NODES
337 # Some NUMA nodes have memory ranges that span
338 # other nodes. Even though a pfn is valid and
339 # between a node's start and end pfns, it may not
340 # reside on that node. See memmap_init_zone()
342 config NODES_SPAN_OTHER_NODES
344 depends on NEED_MULTIPLE_NODES
346 config ARCH_POPULATES_NODE_MAP
347 def_bool y if SPARC64
349 config ARCH_SELECT_MEMORY_MODEL
350 def_bool y if SPARC64
352 config ARCH_SPARSEMEM_ENABLE
353 def_bool y if SPARC64
354 select SPARSEMEM_VMEMMAP_ENABLE
356 config ARCH_SPARSEMEM_DEFAULT
357 def_bool y if SPARC64
362 bool "SMT (Hyperthreading) scheduler support"
363 depends on SPARC64 && SMP
366 SMT scheduler support improves the CPU scheduler's decision making
367 when dealing with SPARC cpus at a cost of slightly increased overhead
368 in some places. If unsure say N here.
371 bool "Multi-core scheduler support"
372 depends on SPARC64 && SMP
375 Multi-core scheduler support improves the CPU scheduler's decision
376 making when dealing with multi-core CPU chips at a cost of slightly
377 increased overhead in some places. If unsure say N here.
380 source "kernel/Kconfig.preempt"
384 bool "Default bootloader kernel arguments"
388 string "Initial kernel command string"
389 depends on CMDLINE_BOOL
390 default "console=ttyS0,9600 root=/dev/sda1"
392 Say Y here if you want to be able to pass default arguments to
393 the kernel. This will be overridden by the bootloader, if you
394 use one (such as SILO). This is most useful if you want to boot
395 a kernel from TFTP, and want default options to be available
396 with having them passed on the command line.
398 NOTE: This option WILL override the PROM bootargs setting!
404 Enable power management and CPU standby features on supported
408 tristate "Sun4m LED driver"
411 This driver toggles the front-panel LED on sun4m systems
412 in a user-specifiable manner. Its state can be probed
413 by reading /proc/led and its blinking mode can be changed
414 via writes to /proc/led
416 config SERIAL_CONSOLE
421 If you say Y here, it will be possible to use a serial port as the
422 system console (the system console is the device which receives all
423 kernel messages and warnings and which allows logins in single user
424 mode). This could be useful if some terminal or printer is connected
427 Even if you say Y here, the currently visible virtual console
428 (/dev/tty0) will still be used as the system console by default, but
429 you can alter that using a kernel command line option such as
430 "console=ttyS1". (Try "man bootparam" or see the documentation of
431 your boot loader (silo) about how to pass options to the kernel at
434 If you don't have a graphics card installed and you say Y here, the
435 kernel will automatically use the first serial line, /dev/ttyS0, as
442 menu "Bus options (PCI etc.)"
452 bool "Sun Logical Domains support"
455 Say Y here is you want to support virtual devices via
459 bool "Support for PCI and PS/2 keyboard/mouse"
461 Find out whether your system includes a PCI bus. PCI is the name of
462 a bus system, i.e. the way the CPU talks to the other stuff inside
463 your box. If you say Y here, the kernel will include drivers and
464 infrastructure code to support PCI bus devices.
466 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
467 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
468 All of these platforms are extremely obscure, so say N if unsure.
471 def_bool PCI if SPARC64
476 source "drivers/pci/Kconfig"
478 source "drivers/pcmcia/Kconfig"
480 config SUN_OPENPROMFS
481 tristate "Openprom tree appears in /proc/openprom"
483 If you say Y, the OpenPROM device tree will be available as a
484 virtual file system, which you can mount to /proc/openprom by "mount
485 -t openpromfs none /proc/openprom".
487 To compile the /proc/openprom support as a module, choose M here: the
488 module will be called openpromfs.
490 Only choose N if you know in advance that you will not need to modify
491 OpenPROM settings on the running system.
497 depends on SPARC32 && PCI
502 depends on SPARC64 && PCI
506 menu "Executable file formats"
508 source "fs/Kconfig.binfmt"
514 select COMPAT_BINFMT_ELF
516 config SYSVIPC_COMPAT
518 depends on COMPAT && SYSVIPC
525 source "drivers/Kconfig"
527 source "drivers/sbus/char/Kconfig"
531 source "arch/sparc/Kconfig.debug"
533 source "security/Kconfig"
535 source "crypto/Kconfig"