1 # For a description of the syntax of this configuration file,
2 # see Documentation/kbuild/kconfig-language.txt.
5 mainmenu "Linux/SPARC Kernel Configuration"
12 select HAVE_ARCH_KGDB if !SMP || SPARC64
13 select HAVE_ARCH_TRACEHOOK
14 select ARCH_WANT_OPTIONAL_GPIOLIB
18 # Identify this as a Sparc32 build
21 default y if ARCH = "sparc"
23 SPARC is a family of RISC microprocessors designed and marketed by
24 Sun Microsystems, incorporated. They are very widely found in Sun
25 workstations and clones. This port covers the original 32-bit SPARC;
26 it is old and stable and usually considered one of the "big three"
27 along with the Intel and Alpha ports. The UltraLinux project
28 maintains both the SPARC32 and SPARC64 ports; its web page is
29 available at <http://www.ultralinux.org/>.
33 default y if ARCH = "sparc64"
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
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 GENERIC_HARDIRQS_NO__DO_IRQ
100 def_bool y if SPARC64
114 config GENERIC_ISA_DMA
121 Generic GPIO API support
123 config ARCH_NO_VIRT_TO_BUS
129 source "init/Kconfig"
131 source "kernel/Kconfig.freezer"
133 menu "Processor type and features"
136 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
138 This enables support for systems with more than one CPU. If you have
139 a system with only one CPU, say N. If you have a system with more
142 If you say N here, the kernel will run on single and multiprocessor
143 machines, but will use only one CPU of a multiprocessor machine. If
144 you say Y here, the kernel will run on many, but not all,
145 singleprocessor machines. On a singleprocessor machine, the kernel
146 will run faster if you say N here.
148 People using multiprocessor machines who say Y here should also say
149 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
150 Management" code will be disabled if you say Y here.
152 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
153 available at <http://www.tldp.org/docs.html#howto>.
155 If you don't know what to do here, say N.
158 int "Maximum number of CPUs"
160 range 2 32 if SPARC32
161 range 2 1024 if SPARC64
162 default 32 if SPARC32
163 default 64 if SPARC64
165 source kernel/Kconfig.hz
167 config RWSEM_GENERIC_SPINLOCK
171 config RWSEM_XCHGADD_ALGORITHM
175 config GENERIC_FIND_NEXT_BIT
179 config GENERIC_HWEIGHT
181 default y if !ULTRA_HAS_POPULATION_COUNT
183 config GENERIC_CALIBRATE_DELAY
187 config ARCH_MAY_HAVE_PC_FDC
191 config EMULATED_CMPXCHG
195 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
196 is emulated, and therefore it is not completely atomic.
202 depends on SPARC32 && SMP
207 depends on SPARC64 && SMP
210 prompt "Kernel page size" if SPARC64
211 default SPARC64_PAGE_SIZE_8KB
213 config SPARC64_PAGE_SIZE_8KB
216 This lets you select the page size of the kernel.
218 8KB and 64KB work quite well, since SPARC ELF sections
219 provide for up to 64KB alignment.
221 If you don't know what to do, choose 8KB.
223 config SPARC64_PAGE_SIZE_64KB
229 bool "Enable seccomp to safely compute untrusted bytecode"
230 depends on SPARC64 && PROC_FS
233 This kernel feature is useful for number crunching applications
234 that may need to compute untrusted bytecode during their
235 execution. By using pipes or other transports made available to
236 the process as file descriptors supporting the read/write
237 syscalls, it's possible to isolate those applications in
238 their own address space using seccomp. Once seccomp is
239 enabled via /proc/<pid>/seccomp, it cannot be disabled
240 and the task is only allowed to execute a few safe syscalls
241 defined by each seccomp mode.
243 If unsure, say Y. Only embedded should say N here.
246 bool "Support for hot-pluggable CPUs"
247 depends on SPARC64 && SMP
250 Say Y here to experiment with turning CPUs off and on. CPUs
251 can be controlled through /sys/devices/system/cpu/cpu#.
252 Say N if you want to disable CPU hotplug.
254 config GENERIC_HARDIRQS
258 source "kernel/time/Kconfig"
261 source "drivers/cpufreq/Kconfig"
264 tristate "UltraSPARC-III CPU Frequency driver"
266 select CPU_FREQ_TABLE
268 This adds the CPUFreq driver for UltraSPARC-III processors.
270 For details, take a look at <file:Documentation/cpu-freq>.
275 tristate "UltraSPARC-IIe CPU Frequency driver"
277 select CPU_FREQ_TABLE
279 This adds the CPUFreq driver for UltraSPARC-IIe processors.
281 For details, take a look at <file:Documentation/cpu-freq>.
288 tristate "UltraSPARC-III Memory Controller driver"
292 This adds a driver for the UltraSPARC-III memory controller.
293 Loading this driver allows exact mnemonic strings to be
294 printed in the event of a memory error, so that the faulty DIMM
295 on the motherboard can be matched to the error.
297 If in doubt, say Y, as this information can be very useful.
299 # Global things across all Sun machines.
300 config GENERIC_LOCKBREAK
303 depends on SPARC64 && SMP && PREEMPT
306 prompt "SPARC64 Huge TLB Page Size"
307 depends on SPARC64 && HUGETLB_PAGE
308 default HUGETLB_PAGE_SIZE_4MB
310 config HUGETLB_PAGE_SIZE_4MB
313 config HUGETLB_PAGE_SIZE_512K
316 config HUGETLB_PAGE_SIZE_64K
317 depends on !SPARC64_PAGE_SIZE_64KB
324 depends on SPARC64 && SMP
329 depends on NEED_MULTIPLE_NODES
331 # Some NUMA nodes have memory ranges that span
332 # other nodes. Even though a pfn is valid and
333 # between a node's start and end pfns, it may not
334 # reside on that node. See memmap_init_zone()
336 config NODES_SPAN_OTHER_NODES
338 depends on NEED_MULTIPLE_NODES
340 config ARCH_POPULATES_NODE_MAP
341 def_bool y if SPARC64
343 config ARCH_SELECT_MEMORY_MODEL
344 def_bool y if SPARC64
346 config ARCH_SPARSEMEM_ENABLE
347 def_bool y if SPARC64
348 select SPARSEMEM_VMEMMAP_ENABLE
350 config ARCH_SPARSEMEM_DEFAULT
351 def_bool y if SPARC64
356 bool "SMT (Hyperthreading) scheduler support"
357 depends on SPARC64 && SMP
360 SMT scheduler support improves the CPU scheduler's decision making
361 when dealing with SPARC cpus at a cost of slightly increased overhead
362 in some places. If unsure say N here.
365 bool "Multi-core scheduler support"
366 depends on SPARC64 && SMP
369 Multi-core scheduler support improves the CPU scheduler's decision
370 making when dealing with multi-core CPU chips at a cost of slightly
371 increased overhead in some places. If unsure say N here.
374 source "kernel/Kconfig.preempt"
378 bool "Default bootloader kernel arguments"
382 string "Initial kernel command string"
383 depends on CMDLINE_BOOL
384 default "console=ttyS0,9600 root=/dev/sda1"
386 Say Y here if you want to be able to pass default arguments to
387 the kernel. This will be overridden by the bootloader, if you
388 use one (such as SILO). This is most useful if you want to boot
389 a kernel from TFTP, and want default options to be available
390 with having them passed on the command line.
392 NOTE: This option WILL override the PROM bootargs setting!
398 Enable power management and CPU standby features on supported
402 tristate "Sun4m LED driver"
405 This driver toggles the front-panel LED on sun4m systems
406 in a user-specifiable manner. Its state can be probed
407 by reading /proc/led and its blinking mode can be changed
408 via writes to /proc/led
410 config SERIAL_CONSOLE
415 If you say Y here, it will be possible to use a serial port as the
416 system console (the system console is the device which receives all
417 kernel messages and warnings and which allows logins in single user
418 mode). This could be useful if some terminal or printer is connected
421 Even if you say Y here, the currently visible virtual console
422 (/dev/tty0) will still be used as the system console by default, but
423 you can alter that using a kernel command line option such as
424 "console=ttyS1". (Try "man bootparam" or see the documentation of
425 your boot loader (silo) about how to pass options to the kernel at
428 If you don't have a graphics card installed and you say Y here, the
429 kernel will automatically use the first serial line, /dev/ttyS0, as
436 menu "Bus options (PCI etc.)"
446 bool "Sun Logical Domains support"
449 Say Y here is you want to support virtual devices via
453 bool "Support for PCI and PS/2 keyboard/mouse"
455 Find out whether your system includes a PCI bus. PCI is the name of
456 a bus system, i.e. the way the CPU talks to the other stuff inside
457 your box. If you say Y here, the kernel will include drivers and
458 infrastructure code to support PCI bus devices.
460 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
461 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
462 All of these platforms are extremely obscure, so say N if unsure.
465 def_bool PCI if SPARC64
470 source "drivers/pci/Kconfig"
472 source "drivers/pcmcia/Kconfig"
474 config SUN_OPENPROMFS
475 tristate "Openprom tree appears in /proc/openprom"
477 If you say Y, the OpenPROM device tree will be available as a
478 virtual file system, which you can mount to /proc/openprom by "mount
479 -t openpromfs none /proc/openprom".
481 To compile the /proc/openprom support as a module, choose M here: the
482 module will be called openpromfs.
484 Only choose N if you know in advance that you will not need to modify
485 OpenPROM settings on the running system.
491 depends on SPARC32 && PCI
496 depends on SPARC64 && PCI
500 menu "Executable file formats"
502 source "fs/Kconfig.binfmt"
508 select COMPAT_BINFMT_ELF
510 config SYSVIPC_COMPAT
512 depends on COMPAT && SYSVIPC
519 source "drivers/Kconfig"
521 source "drivers/sbus/char/Kconfig"
525 source "arch/sparc/Kconfig.debug"
527 source "security/Kconfig"
529 source "crypto/Kconfig"