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 HAVE_FUNCTION_TRACER
35 select HAVE_KRETPROBES
38 select USE_GENERIC_SMP_HELPERS if SMP
42 select RTC_DRV_STARFIRE
46 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
47 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
49 # CONFIG_BITS can be used at source level to get 32/64 bits
62 config GENERIC_CMOS_UPDATE
66 config GENERIC_CLOCKEVENTS
78 config STACKTRACE_SUPPORT
82 config LOCKDEP_SUPPORT
86 config HAVE_LATENCYTOP_SUPPORT
94 config HAVE_SETUP_PER_CPU_AREA
97 config GENERIC_HARDIRQS_NO__DO_IRQ
113 config GENERIC_ISA_DMA
120 Generic GPIO API support
122 config ARCH_NO_VIRT_TO_BUS
128 source "init/Kconfig"
130 source "kernel/Kconfig.freezer"
132 menu "Processor type and features"
135 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
137 This enables support for systems with more than one CPU. If you have
138 a system with only one CPU, say N. If you have a system with more
141 If you say N here, the kernel will run on single and multiprocessor
142 machines, but will use only one CPU of a multiprocessor machine. If
143 you say Y here, the kernel will run on many, but not all,
144 singleprocessor machines. On a singleprocessor machine, the kernel
145 will run faster if you say N here.
147 People using multiprocessor machines who say Y here should also say
148 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
149 Management" code will be disabled if you say Y here.
151 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
152 available at <http://www.tldp.org/docs.html#howto>.
154 If you don't know what to do here, say N.
157 int "Maximum number of CPUs"
159 range 2 32 if SPARC32
160 range 2 1024 if SPARC64
161 default 32 if SPARC32
162 default 64 if SPARC64
164 source kernel/Kconfig.hz
166 config RWSEM_GENERIC_SPINLOCK
170 config RWSEM_XCHGADD_ALGORITHM
174 config GENERIC_FIND_NEXT_BIT
178 config GENERIC_HWEIGHT
180 default y if !ULTRA_HAS_POPULATION_COUNT
182 config GENERIC_CALIBRATE_DELAY
186 config ARCH_MAY_HAVE_PC_FDC
190 config ARCH_HAS_ILOG2_U32
194 config ARCH_HAS_ILOG2_U64
198 config EMULATED_CMPXCHG
202 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
203 is emulated, and therefore it is not completely atomic.
209 depends on SPARC32 && SMP
214 depends on SPARC64 && SMP
217 prompt "Kernel page size" if SPARC64
218 default SPARC64_PAGE_SIZE_8KB
220 config SPARC64_PAGE_SIZE_8KB
223 This lets you select the page size of the kernel.
225 8KB and 64KB work quite well, since SPARC ELF sections
226 provide for up to 64KB alignment.
228 If you don't know what to do, choose 8KB.
230 config SPARC64_PAGE_SIZE_64KB
236 bool "Enable seccomp to safely compute untrusted bytecode"
237 depends on SPARC64 && PROC_FS
240 This kernel feature is useful for number crunching applications
241 that may need to compute untrusted bytecode during their
242 execution. By using pipes or other transports made available to
243 the process as file descriptors supporting the read/write
244 syscalls, it's possible to isolate those applications in
245 their own address space using seccomp. Once seccomp is
246 enabled via /proc/<pid>/seccomp, it cannot be disabled
247 and the task is only allowed to execute a few safe syscalls
248 defined by each seccomp mode.
250 If unsure, say Y. Only embedded should say N here.
253 bool "Support for hot-pluggable CPUs"
254 depends on SPARC64 && SMP
257 Say Y here to experiment with turning CPUs off and on. CPUs
258 can be controlled through /sys/devices/system/cpu/cpu#.
259 Say N if you want to disable CPU hotplug.
261 config GENERIC_HARDIRQS
265 source "kernel/time/Kconfig"
268 source "drivers/cpufreq/Kconfig"
271 tristate "UltraSPARC-III CPU Frequency driver"
273 select CPU_FREQ_TABLE
275 This adds the CPUFreq driver for UltraSPARC-III processors.
277 For details, take a look at <file:Documentation/cpu-freq>.
282 tristate "UltraSPARC-IIe CPU Frequency driver"
284 select CPU_FREQ_TABLE
286 This adds the CPUFreq driver for UltraSPARC-IIe processors.
288 For details, take a look at <file:Documentation/cpu-freq>.
295 tristate "UltraSPARC-III Memory Controller driver"
299 This adds a driver for the UltraSPARC-III memory controller.
300 Loading this driver allows exact mnemonic strings to be
301 printed in the event of a memory error, so that the faulty DIMM
302 on the motherboard can be matched to the error.
304 If in doubt, say Y, as this information can be very useful.
306 # Global things across all Sun machines.
307 config GENERIC_LOCKBREAK
310 depends on SPARC64 && SMP && PREEMPT
313 prompt "SPARC64 Huge TLB Page Size"
314 depends on SPARC64 && HUGETLB_PAGE
315 default HUGETLB_PAGE_SIZE_4MB
317 config HUGETLB_PAGE_SIZE_4MB
320 config HUGETLB_PAGE_SIZE_512K
323 config HUGETLB_PAGE_SIZE_64K
324 depends on !SPARC64_PAGE_SIZE_64KB
331 depends on SPARC64 && SMP
336 depends on NEED_MULTIPLE_NODES
338 # Some NUMA nodes have memory ranges that span
339 # other nodes. Even though a pfn is valid and
340 # between a node's start and end pfns, it may not
341 # reside on that node. See memmap_init_zone()
343 config NODES_SPAN_OTHER_NODES
345 depends on NEED_MULTIPLE_NODES
347 config ARCH_POPULATES_NODE_MAP
348 def_bool y if SPARC64
350 config ARCH_SELECT_MEMORY_MODEL
351 def_bool y if SPARC64
353 config ARCH_SPARSEMEM_ENABLE
354 def_bool y if SPARC64
355 select SPARSEMEM_VMEMMAP_ENABLE
357 config ARCH_SPARSEMEM_DEFAULT
358 def_bool y if SPARC64
363 bool "SMT (Hyperthreading) scheduler support"
364 depends on SPARC64 && SMP
367 SMT scheduler support improves the CPU scheduler's decision making
368 when dealing with SPARC cpus at a cost of slightly increased overhead
369 in some places. If unsure say N here.
372 bool "Multi-core scheduler support"
373 depends on SPARC64 && SMP
376 Multi-core scheduler support improves the CPU scheduler's decision
377 making when dealing with multi-core CPU chips at a cost of slightly
378 increased overhead in some places. If unsure say N here.
381 source "kernel/Kconfig.preempt"
385 bool "Default bootloader kernel arguments"
389 string "Initial kernel command string"
390 depends on CMDLINE_BOOL
391 default "console=ttyS0,9600 root=/dev/sda1"
393 Say Y here if you want to be able to pass default arguments to
394 the kernel. This will be overridden by the bootloader, if you
395 use one (such as SILO). This is most useful if you want to boot
396 a kernel from TFTP, and want default options to be available
397 with having them passed on the command line.
399 NOTE: This option WILL override the PROM bootargs setting!
405 Enable power management and CPU standby features on supported
409 tristate "Sun4m LED driver"
412 This driver toggles the front-panel LED on sun4m systems
413 in a user-specifiable manner. Its state can be probed
414 by reading /proc/led and its blinking mode can be changed
415 via writes to /proc/led
417 config SERIAL_CONSOLE
422 If you say Y here, it will be possible to use a serial port as the
423 system console (the system console is the device which receives all
424 kernel messages and warnings and which allows logins in single user
425 mode). This could be useful if some terminal or printer is connected
428 Even if you say Y here, the currently visible virtual console
429 (/dev/tty0) will still be used as the system console by default, but
430 you can alter that using a kernel command line option such as
431 "console=ttyS1". (Try "man bootparam" or see the documentation of
432 your boot loader (silo) about how to pass options to the kernel at
435 If you don't have a graphics card installed and you say Y here, the
436 kernel will automatically use the first serial line, /dev/ttyS0, as
443 menu "Bus options (PCI etc.)"
447 ISA is found on Espresso only and is not supported currently.
452 ISAPNP is not supported
457 EISA is not supported.
462 MCA is not supported.
477 bool "Sun Logical Domains support"
480 Say Y here is you want to support virtual devices via
484 bool "Support for PCI and PS/2 keyboard/mouse"
485 select ARCH_SUPPORTS_MSI if SPARC64
487 Find out whether your system includes a PCI bus. PCI is the name of
488 a bus system, i.e. the way the CPU talks to the other stuff inside
489 your box. If you say Y here, the kernel will include drivers and
490 infrastructure code to support PCI bus devices.
492 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
493 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
494 All of these platforms are extremely obscure, so say N if unsure.
497 def_bool PCI if SPARC64
502 source "drivers/pci/Kconfig"
504 source "drivers/pcmcia/Kconfig"
506 config SUN_OPENPROMFS
507 tristate "Openprom tree appears in /proc/openprom"
509 If you say Y, the OpenPROM device tree will be available as a
510 virtual file system, which you can mount to /proc/openprom by "mount
511 -t openpromfs none /proc/openprom".
513 To compile the /proc/openprom support as a module, choose M here: the
514 module will be called openpromfs.
516 Only choose N if you know in advance that you will not need to modify
517 OpenPROM settings on the running system.
523 depends on SPARC32 && PCI
528 depends on SPARC64 && PCI
532 menu "Executable file formats"
534 source "fs/Kconfig.binfmt"
540 select COMPAT_BINFMT_ELF
542 config SYSVIPC_COMPAT
544 depends on COMPAT && SYSVIPC
551 source "drivers/Kconfig"
553 source "drivers/sbus/char/Kconfig"
557 source "arch/sparc/Kconfig.debug"
559 source "security/Kconfig"
561 source "crypto/Kconfig"