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 USE_GENERIC_SMP_HELPERS if SMP
44 select RTC_DRV_STARFIRE
48 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
49 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
51 # CONFIG_BITS can be used at source level to get 32/64 bits
61 config GENERIC_CMOS_UPDATE
65 config GENERIC_CLOCKEVENTS
77 config STACKTRACE_SUPPORT
81 config LOCKDEP_SUPPORT
85 config HAVE_LATENCYTOP_SUPPORT
93 config HAVE_SETUP_PER_CPU_AREA
96 config HAVE_DYNAMIC_PER_CPU_AREA
99 config GENERIC_HARDIRQS_NO__DO_IRQ
101 def_bool y if SPARC64
115 config GENERIC_ISA_DMA
122 Generic GPIO API support
124 config ARCH_NO_VIRT_TO_BUS
130 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
131 def_bool y if SPARC64
133 source "init/Kconfig"
135 source "kernel/Kconfig.freezer"
137 menu "Processor type and features"
140 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
142 This enables support for systems with more than one CPU. If you have
143 a system with only one CPU, say N. If you have a system with more
146 If you say N here, the kernel will run on single and multiprocessor
147 machines, but will use only one CPU of a multiprocessor machine. If
148 you say Y here, the kernel will run on many, but not all,
149 singleprocessor machines. On a singleprocessor machine, the kernel
150 will run faster if you say N here.
152 People using multiprocessor machines who say Y here should also say
153 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
154 Management" code will be disabled if you say Y here.
156 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
157 available at <http://www.tldp.org/docs.html#howto>.
159 If you don't know what to do here, say N.
162 int "Maximum number of CPUs"
164 range 2 32 if SPARC32
165 range 2 1024 if SPARC64
166 default 32 if SPARC32
167 default 64 if SPARC64
169 source kernel/Kconfig.hz
171 config RWSEM_GENERIC_SPINLOCK
175 config RWSEM_XCHGADD_ALGORITHM
179 config GENERIC_FIND_NEXT_BIT
183 config GENERIC_HWEIGHT
185 default y if !ULTRA_HAS_POPULATION_COUNT
187 config GENERIC_CALIBRATE_DELAY
191 config ARCH_MAY_HAVE_PC_FDC
195 config EMULATED_CMPXCHG
199 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
200 is emulated, and therefore it is not completely atomic.
206 depends on SPARC32 && SMP
211 depends on SPARC64 && SMP
214 prompt "Kernel page size" if SPARC64
215 default SPARC64_PAGE_SIZE_8KB
217 config SPARC64_PAGE_SIZE_8KB
220 This lets you select the page size of the kernel.
222 8KB and 64KB work quite well, since SPARC ELF sections
223 provide for up to 64KB alignment.
225 If you don't know what to do, choose 8KB.
227 config SPARC64_PAGE_SIZE_64KB
233 bool "Enable seccomp to safely compute untrusted bytecode"
234 depends on SPARC64 && PROC_FS
237 This kernel feature is useful for number crunching applications
238 that may need to compute untrusted bytecode during their
239 execution. By using pipes or other transports made available to
240 the process as file descriptors supporting the read/write
241 syscalls, it's possible to isolate those applications in
242 their own address space using seccomp. Once seccomp is
243 enabled via /proc/<pid>/seccomp, it cannot be disabled
244 and the task is only allowed to execute a few safe syscalls
245 defined by each seccomp mode.
247 If unsure, say Y. Only embedded should say N here.
250 bool "Support for hot-pluggable CPUs"
251 depends on SPARC64 && SMP
254 Say Y here to experiment with turning CPUs off and on. CPUs
255 can be controlled through /sys/devices/system/cpu/cpu#.
256 Say N if you want to disable CPU hotplug.
258 config GENERIC_HARDIRQS
262 source "kernel/time/Kconfig"
265 source "drivers/cpufreq/Kconfig"
268 tristate "UltraSPARC-III CPU Frequency driver"
270 select CPU_FREQ_TABLE
272 This adds the CPUFreq driver for UltraSPARC-III processors.
274 For details, take a look at <file:Documentation/cpu-freq>.
279 tristate "UltraSPARC-IIe CPU Frequency driver"
281 select CPU_FREQ_TABLE
283 This adds the CPUFreq driver for UltraSPARC-IIe processors.
285 For details, take a look at <file:Documentation/cpu-freq>.
292 tristate "UltraSPARC-III Memory Controller driver"
296 This adds a driver for the UltraSPARC-III memory controller.
297 Loading this driver allows exact mnemonic strings to be
298 printed in the event of a memory error, so that the faulty DIMM
299 on the motherboard can be matched to the error.
301 If in doubt, say Y, as this information can be very useful.
303 # Global things across all Sun machines.
304 config GENERIC_LOCKBREAK
307 depends on SPARC64 && SMP && PREEMPT
310 prompt "SPARC64 Huge TLB Page Size"
311 depends on SPARC64 && HUGETLB_PAGE
312 default HUGETLB_PAGE_SIZE_4MB
314 config HUGETLB_PAGE_SIZE_4MB
317 config HUGETLB_PAGE_SIZE_512K
320 config HUGETLB_PAGE_SIZE_64K
321 depends on !SPARC64_PAGE_SIZE_64KB
328 depends on SPARC64 && SMP
333 depends on NEED_MULTIPLE_NODES
335 # Some NUMA nodes have memory ranges that span
336 # other nodes. Even though a pfn is valid and
337 # between a node's start and end pfns, it may not
338 # reside on that node. See memmap_init_zone()
340 config NODES_SPAN_OTHER_NODES
342 depends on NEED_MULTIPLE_NODES
344 config ARCH_POPULATES_NODE_MAP
345 def_bool y if SPARC64
347 config ARCH_SELECT_MEMORY_MODEL
348 def_bool y if SPARC64
350 config ARCH_SPARSEMEM_ENABLE
351 def_bool y if SPARC64
352 select SPARSEMEM_VMEMMAP_ENABLE
354 config ARCH_SPARSEMEM_DEFAULT
355 def_bool y if SPARC64
360 bool "SMT (Hyperthreading) scheduler support"
361 depends on SPARC64 && SMP
364 SMT scheduler support improves the CPU scheduler's decision making
365 when dealing with SPARC cpus at a cost of slightly increased overhead
366 in some places. If unsure say N here.
369 bool "Multi-core scheduler support"
370 depends on SPARC64 && SMP
373 Multi-core scheduler support improves the CPU scheduler's decision
374 making when dealing with multi-core CPU chips at a cost of slightly
375 increased overhead in some places. If unsure say N here.
378 source "kernel/Kconfig.preempt"
382 bool "Default bootloader kernel arguments"
386 string "Initial kernel command string"
387 depends on CMDLINE_BOOL
388 default "console=ttyS0,9600 root=/dev/sda1"
390 Say Y here if you want to be able to pass default arguments to
391 the kernel. This will be overridden by the bootloader, if you
392 use one (such as SILO). This is most useful if you want to boot
393 a kernel from TFTP, and want default options to be available
394 with having them passed on the command line.
396 NOTE: This option WILL override the PROM bootargs setting!
402 Enable power management and CPU standby features on supported
406 tristate "Sun4m LED driver"
409 This driver toggles the front-panel LED on sun4m systems
410 in a user-specifiable manner. Its state can be probed
411 by reading /proc/led and its blinking mode can be changed
412 via writes to /proc/led
414 config SERIAL_CONSOLE
419 If you say Y here, it will be possible to use a serial port as the
420 system console (the system console is the device which receives all
421 kernel messages and warnings and which allows logins in single user
422 mode). This could be useful if some terminal or printer is connected
425 Even if you say Y here, the currently visible virtual console
426 (/dev/tty0) will still be used as the system console by default, but
427 you can alter that using a kernel command line option such as
428 "console=ttyS1". (Try "man bootparam" or see the documentation of
429 your boot loader (silo) about how to pass options to the kernel at
432 If you don't have a graphics card installed and you say Y here, the
433 kernel will automatically use the first serial line, /dev/ttyS0, as
440 menu "Bus options (PCI etc.)"
450 bool "Sun Logical Domains support"
453 Say Y here is you want to support virtual devices via
457 bool "Support for PCI and PS/2 keyboard/mouse"
459 Find out whether your system includes a PCI bus. PCI is the name of
460 a bus system, i.e. the way the CPU talks to the other stuff inside
461 your box. If you say Y here, the kernel will include drivers and
462 infrastructure code to support PCI bus devices.
464 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
465 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
466 All of these platforms are extremely obscure, so say N if unsure.
469 def_bool PCI if SPARC64
474 source "drivers/pci/Kconfig"
476 source "drivers/pcmcia/Kconfig"
478 config SUN_OPENPROMFS
479 tristate "Openprom tree appears in /proc/openprom"
481 If you say Y, the OpenPROM device tree will be available as a
482 virtual file system, which you can mount to /proc/openprom by "mount
483 -t openpromfs none /proc/openprom".
485 To compile the /proc/openprom support as a module, choose M here: the
486 module will be called openpromfs.
488 Only choose N if you know in advance that you will not need to modify
489 OpenPROM settings on the running system.
495 depends on SPARC32 && PCI
500 depends on SPARC64 && PCI
504 menu "Executable file formats"
506 source "fs/Kconfig.binfmt"
512 select COMPAT_BINFMT_ELF
514 config SYSVIPC_COMPAT
516 depends on COMPAT && SYSVIPC
523 source "drivers/Kconfig"
525 source "drivers/sbus/char/Kconfig"
529 source "arch/sparc/Kconfig.debug"
531 source "security/Kconfig"
533 source "crypto/Kconfig"