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 USE_GENERIC_SMP_HELPERS if SMP
43 select RTC_DRV_STARFIRE
47 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
48 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
50 # CONFIG_BITS can be used at source level to get 32/64 bits
60 config GENERIC_CMOS_UPDATE
64 config GENERIC_CLOCKEVENTS
76 config STACKTRACE_SUPPORT
80 config LOCKDEP_SUPPORT
84 config HAVE_LATENCYTOP_SUPPORT
92 config HAVE_SETUP_PER_CPU_AREA
95 config GENERIC_HARDIRQS_NO__DO_IRQ
111 config GENERIC_ISA_DMA
118 Generic GPIO API support
120 config ARCH_NO_VIRT_TO_BUS
126 source "init/Kconfig"
128 source "kernel/Kconfig.freezer"
130 menu "Processor type and features"
133 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
135 This enables support for systems with more than one CPU. If you have
136 a system with only one CPU, say N. If you have a system with more
139 If you say N here, the kernel will run on single and multiprocessor
140 machines, but will use only one CPU of a multiprocessor machine. If
141 you say Y here, the kernel will run on many, but not all,
142 singleprocessor machines. On a singleprocessor machine, the kernel
143 will run faster if you say N here.
145 People using multiprocessor machines who say Y here should also say
146 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
147 Management" code will be disabled if you say Y here.
149 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
150 available at <http://www.tldp.org/docs.html#howto>.
152 If you don't know what to do here, say N.
155 int "Maximum number of CPUs"
157 range 2 32 if SPARC32
158 range 2 1024 if SPARC64
159 default 32 if SPARC32
160 default 64 if SPARC64
162 source kernel/Kconfig.hz
164 config RWSEM_GENERIC_SPINLOCK
168 config RWSEM_XCHGADD_ALGORITHM
172 config GENERIC_FIND_NEXT_BIT
176 config GENERIC_HWEIGHT
178 default y if !ULTRA_HAS_POPULATION_COUNT
180 config GENERIC_CALIBRATE_DELAY
184 config ARCH_MAY_HAVE_PC_FDC
188 config EMULATED_CMPXCHG
192 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
193 is emulated, and therefore it is not completely atomic.
199 depends on SPARC32 && SMP
204 depends on SPARC64 && SMP
207 prompt "Kernel page size" if SPARC64
208 default SPARC64_PAGE_SIZE_8KB
210 config SPARC64_PAGE_SIZE_8KB
213 This lets you select the page size of the kernel.
215 8KB and 64KB work quite well, since SPARC ELF sections
216 provide for up to 64KB alignment.
218 If you don't know what to do, choose 8KB.
220 config SPARC64_PAGE_SIZE_64KB
226 bool "Enable seccomp to safely compute untrusted bytecode"
227 depends on SPARC64 && PROC_FS
230 This kernel feature is useful for number crunching applications
231 that may need to compute untrusted bytecode during their
232 execution. By using pipes or other transports made available to
233 the process as file descriptors supporting the read/write
234 syscalls, it's possible to isolate those applications in
235 their own address space using seccomp. Once seccomp is
236 enabled via /proc/<pid>/seccomp, it cannot be disabled
237 and the task is only allowed to execute a few safe syscalls
238 defined by each seccomp mode.
240 If unsure, say Y. Only embedded should say N here.
243 bool "Support for hot-pluggable CPUs"
244 depends on SPARC64 && SMP
247 Say Y here to experiment with turning CPUs off and on. CPUs
248 can be controlled through /sys/devices/system/cpu/cpu#.
249 Say N if you want to disable CPU hotplug.
251 config GENERIC_HARDIRQS
255 source "kernel/time/Kconfig"
258 source "drivers/cpufreq/Kconfig"
261 tristate "UltraSPARC-III CPU Frequency driver"
263 select CPU_FREQ_TABLE
265 This adds the CPUFreq driver for UltraSPARC-III processors.
267 For details, take a look at <file:Documentation/cpu-freq>.
272 tristate "UltraSPARC-IIe CPU Frequency driver"
274 select CPU_FREQ_TABLE
276 This adds the CPUFreq driver for UltraSPARC-IIe processors.
278 For details, take a look at <file:Documentation/cpu-freq>.
285 tristate "UltraSPARC-III Memory Controller driver"
289 This adds a driver for the UltraSPARC-III memory controller.
290 Loading this driver allows exact mnemonic strings to be
291 printed in the event of a memory error, so that the faulty DIMM
292 on the motherboard can be matched to the error.
294 If in doubt, say Y, as this information can be very useful.
296 # Global things across all Sun machines.
297 config GENERIC_LOCKBREAK
300 depends on SPARC64 && SMP && PREEMPT
303 prompt "SPARC64 Huge TLB Page Size"
304 depends on SPARC64 && HUGETLB_PAGE
305 default HUGETLB_PAGE_SIZE_4MB
307 config HUGETLB_PAGE_SIZE_4MB
310 config HUGETLB_PAGE_SIZE_512K
313 config HUGETLB_PAGE_SIZE_64K
314 depends on !SPARC64_PAGE_SIZE_64KB
321 depends on SPARC64 && SMP
326 depends on NEED_MULTIPLE_NODES
328 # Some NUMA nodes have memory ranges that span
329 # other nodes. Even though a pfn is valid and
330 # between a node's start and end pfns, it may not
331 # reside on that node. See memmap_init_zone()
333 config NODES_SPAN_OTHER_NODES
335 depends on NEED_MULTIPLE_NODES
337 config ARCH_POPULATES_NODE_MAP
338 def_bool y if SPARC64
340 config ARCH_SELECT_MEMORY_MODEL
341 def_bool y if SPARC64
343 config ARCH_SPARSEMEM_ENABLE
344 def_bool y if SPARC64
345 select SPARSEMEM_VMEMMAP_ENABLE
347 config ARCH_SPARSEMEM_DEFAULT
348 def_bool y if SPARC64
353 bool "SMT (Hyperthreading) scheduler support"
354 depends on SPARC64 && SMP
357 SMT scheduler support improves the CPU scheduler's decision making
358 when dealing with SPARC cpus at a cost of slightly increased overhead
359 in some places. If unsure say N here.
362 bool "Multi-core scheduler support"
363 depends on SPARC64 && SMP
366 Multi-core scheduler support improves the CPU scheduler's decision
367 making when dealing with multi-core CPU chips at a cost of slightly
368 increased overhead in some places. If unsure say N here.
371 source "kernel/Kconfig.preempt"
375 bool "Default bootloader kernel arguments"
379 string "Initial kernel command string"
380 depends on CMDLINE_BOOL
381 default "console=ttyS0,9600 root=/dev/sda1"
383 Say Y here if you want to be able to pass default arguments to
384 the kernel. This will be overridden by the bootloader, if you
385 use one (such as SILO). This is most useful if you want to boot
386 a kernel from TFTP, and want default options to be available
387 with having them passed on the command line.
389 NOTE: This option WILL override the PROM bootargs setting!
395 Enable power management and CPU standby features on supported
399 tristate "Sun4m LED driver"
402 This driver toggles the front-panel LED on sun4m systems
403 in a user-specifiable manner. Its state can be probed
404 by reading /proc/led and its blinking mode can be changed
405 via writes to /proc/led
407 config SERIAL_CONSOLE
412 If you say Y here, it will be possible to use a serial port as the
413 system console (the system console is the device which receives all
414 kernel messages and warnings and which allows logins in single user
415 mode). This could be useful if some terminal or printer is connected
418 Even if you say Y here, the currently visible virtual console
419 (/dev/tty0) will still be used as the system console by default, but
420 you can alter that using a kernel command line option such as
421 "console=ttyS1". (Try "man bootparam" or see the documentation of
422 your boot loader (silo) about how to pass options to the kernel at
425 If you don't have a graphics card installed and you say Y here, the
426 kernel will automatically use the first serial line, /dev/ttyS0, as
433 menu "Bus options (PCI etc.)"
443 bool "Sun Logical Domains support"
446 Say Y here is you want to support virtual devices via
450 bool "Support for PCI and PS/2 keyboard/mouse"
452 Find out whether your system includes a PCI bus. PCI is the name of
453 a bus system, i.e. the way the CPU talks to the other stuff inside
454 your box. If you say Y here, the kernel will include drivers and
455 infrastructure code to support PCI bus devices.
457 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
458 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
459 All of these platforms are extremely obscure, so say N if unsure.
462 def_bool PCI if SPARC64
467 source "drivers/pci/Kconfig"
469 source "drivers/pcmcia/Kconfig"
471 config SUN_OPENPROMFS
472 tristate "Openprom tree appears in /proc/openprom"
474 If you say Y, the OpenPROM device tree will be available as a
475 virtual file system, which you can mount to /proc/openprom by "mount
476 -t openpromfs none /proc/openprom".
478 To compile the /proc/openprom support as a module, choose M here: the
479 module will be called openpromfs.
481 Only choose N if you know in advance that you will not need to modify
482 OpenPROM settings on the running system.
488 depends on SPARC32 && PCI
493 depends on SPARC64 && PCI
497 menu "Executable file formats"
499 source "fs/Kconfig.binfmt"
505 select COMPAT_BINFMT_ELF
507 config SYSVIPC_COMPAT
509 depends on COMPAT && SYSVIPC
516 source "drivers/Kconfig"
518 source "drivers/sbus/char/Kconfig"
522 source "arch/sparc/Kconfig.debug"
524 source "security/Kconfig"
526 source "crypto/Kconfig"