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
28 select HAVE_PERF_COUNTERS
30 select HAVE_DMA_API_DEBUG
37 select ARCH_SUPPORTS_MSI
38 select HAVE_FUNCTION_TRACER
39 select HAVE_KRETPROBES
42 select HAVE_SYSCALL_WRAPPERS
43 select HAVE_DYNAMIC_FTRACE
44 select HAVE_FTRACE_MCOUNT_RECORD
45 select USE_GENERIC_SMP_HELPERS if SMP
49 select RTC_DRV_STARFIRE
50 select HAVE_PERF_COUNTERS
54 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
55 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
57 # CONFIG_BITS can be used at source level to get 32/64 bits
67 config GENERIC_CMOS_UPDATE
71 config GENERIC_CLOCKEVENTS
83 config STACKTRACE_SUPPORT
87 config LOCKDEP_SUPPORT
91 config HAVE_LATENCYTOP_SUPPORT
99 config HAVE_SETUP_PER_CPU_AREA
100 def_bool y if SPARC64
102 config NEED_PER_CPU_EMBED_FIRST_CHUNK
103 def_bool y if SPARC64
105 config GENERIC_HARDIRQS_NO__DO_IRQ
107 def_bool y if SPARC64
121 config GENERIC_ISA_DMA
128 Generic GPIO API support
130 config ARCH_NO_VIRT_TO_BUS
136 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
137 def_bool y if SPARC64
139 source "init/Kconfig"
141 source "kernel/Kconfig.freezer"
143 menu "Processor type and features"
146 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
148 This enables support for systems with more than one CPU. If you have
149 a system with only one CPU, say N. If you have a system with more
152 If you say N here, the kernel will run on single and multiprocessor
153 machines, but will use only one CPU of a multiprocessor machine. If
154 you say Y here, the kernel will run on many, but not all,
155 singleprocessor machines. On a singleprocessor machine, the kernel
156 will run faster if you say N here.
158 People using multiprocessor machines who say Y here should also say
159 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
160 Management" code will be disabled if you say Y here.
162 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
163 available at <http://www.tldp.org/docs.html#howto>.
165 If you don't know what to do here, say N.
168 int "Maximum number of CPUs"
170 range 2 32 if SPARC32
171 range 2 1024 if SPARC64
172 default 32 if SPARC32
173 default 64 if SPARC64
175 source kernel/Kconfig.hz
177 config RWSEM_GENERIC_SPINLOCK
181 config RWSEM_XCHGADD_ALGORITHM
185 config GENERIC_FIND_NEXT_BIT
189 config GENERIC_HWEIGHT
191 default y if !ULTRA_HAS_POPULATION_COUNT
193 config GENERIC_CALIBRATE_DELAY
197 config ARCH_MAY_HAVE_PC_FDC
201 config EMULATED_CMPXCHG
205 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
206 is emulated, and therefore it is not completely atomic.
212 depends on SPARC32 && SMP
217 depends on SPARC64 && SMP
220 prompt "Kernel page size" if SPARC64
221 default SPARC64_PAGE_SIZE_8KB
223 config SPARC64_PAGE_SIZE_8KB
226 This lets you select the page size of the kernel.
228 8KB and 64KB work quite well, since SPARC ELF sections
229 provide for up to 64KB alignment.
231 If you don't know what to do, choose 8KB.
233 config SPARC64_PAGE_SIZE_64KB
239 bool "Enable seccomp to safely compute untrusted bytecode"
240 depends on SPARC64 && PROC_FS
243 This kernel feature is useful for number crunching applications
244 that may need to compute untrusted bytecode during their
245 execution. By using pipes or other transports made available to
246 the process as file descriptors supporting the read/write
247 syscalls, it's possible to isolate those applications in
248 their own address space using seccomp. Once seccomp is
249 enabled via /proc/<pid>/seccomp, it cannot be disabled
250 and the task is only allowed to execute a few safe syscalls
251 defined by each seccomp mode.
253 If unsure, say Y. Only embedded should say N here.
256 bool "Support for hot-pluggable CPUs"
257 depends on SPARC64 && SMP
260 Say Y here to experiment with turning CPUs off and on. CPUs
261 can be controlled through /sys/devices/system/cpu/cpu#.
262 Say N if you want to disable CPU hotplug.
264 config GENERIC_HARDIRQS
268 source "kernel/time/Kconfig"
271 source "drivers/cpufreq/Kconfig"
274 tristate "UltraSPARC-III CPU Frequency driver"
276 select CPU_FREQ_TABLE
278 This adds the CPUFreq driver for UltraSPARC-III processors.
280 For details, take a look at <file:Documentation/cpu-freq>.
285 tristate "UltraSPARC-IIe CPU Frequency driver"
287 select CPU_FREQ_TABLE
289 This adds the CPUFreq driver for UltraSPARC-IIe processors.
291 For details, take a look at <file:Documentation/cpu-freq>.
298 tristate "UltraSPARC-III Memory Controller driver"
302 This adds a driver for the UltraSPARC-III memory controller.
303 Loading this driver allows exact mnemonic strings to be
304 printed in the event of a memory error, so that the faulty DIMM
305 on the motherboard can be matched to the error.
307 If in doubt, say Y, as this information can be very useful.
309 # Global things across all Sun machines.
310 config GENERIC_LOCKBREAK
313 depends on SPARC64 && SMP && PREEMPT
316 prompt "SPARC64 Huge TLB Page Size"
317 depends on SPARC64 && HUGETLB_PAGE
318 default HUGETLB_PAGE_SIZE_4MB
320 config HUGETLB_PAGE_SIZE_4MB
323 config HUGETLB_PAGE_SIZE_512K
326 config HUGETLB_PAGE_SIZE_64K
327 depends on !SPARC64_PAGE_SIZE_64KB
334 depends on SPARC64 && SMP
339 depends on NEED_MULTIPLE_NODES
341 # Some NUMA nodes have memory ranges that span
342 # other nodes. Even though a pfn is valid and
343 # between a node's start and end pfns, it may not
344 # reside on that node. See memmap_init_zone()
346 config NODES_SPAN_OTHER_NODES
348 depends on NEED_MULTIPLE_NODES
350 config ARCH_POPULATES_NODE_MAP
351 def_bool y if SPARC64
353 config ARCH_SELECT_MEMORY_MODEL
354 def_bool y if SPARC64
356 config ARCH_SPARSEMEM_ENABLE
357 def_bool y if SPARC64
358 select SPARSEMEM_VMEMMAP_ENABLE
360 config ARCH_SPARSEMEM_DEFAULT
361 def_bool y if SPARC64
366 bool "SMT (Hyperthreading) scheduler support"
367 depends on SPARC64 && SMP
370 SMT scheduler support improves the CPU scheduler's decision making
371 when dealing with SPARC cpus at a cost of slightly increased overhead
372 in some places. If unsure say N here.
375 bool "Multi-core scheduler support"
376 depends on SPARC64 && SMP
379 Multi-core scheduler support improves the CPU scheduler's decision
380 making when dealing with multi-core CPU chips at a cost of slightly
381 increased overhead in some places. If unsure say N here.
384 source "kernel/Kconfig.preempt"
388 bool "Default bootloader kernel arguments"
392 string "Initial kernel command string"
393 depends on CMDLINE_BOOL
394 default "console=ttyS0,9600 root=/dev/sda1"
396 Say Y here if you want to be able to pass default arguments to
397 the kernel. This will be overridden by the bootloader, if you
398 use one (such as SILO). This is most useful if you want to boot
399 a kernel from TFTP, and want default options to be available
400 with having them passed on the command line.
402 NOTE: This option WILL override the PROM bootargs setting!
408 Enable power management and CPU standby features on supported
412 tristate "Sun4m LED driver"
415 This driver toggles the front-panel LED on sun4m systems
416 in a user-specifiable manner. Its state can be probed
417 by reading /proc/led and its blinking mode can be changed
418 via writes to /proc/led
420 config SERIAL_CONSOLE
425 If you say Y here, it will be possible to use a serial port as the
426 system console (the system console is the device which receives all
427 kernel messages and warnings and which allows logins in single user
428 mode). This could be useful if some terminal or printer is connected
431 Even if you say Y here, the currently visible virtual console
432 (/dev/tty0) will still be used as the system console by default, but
433 you can alter that using a kernel command line option such as
434 "console=ttyS1". (Try "man bootparam" or see the documentation of
435 your boot loader (silo) about how to pass options to the kernel at
438 If you don't have a graphics card installed and you say Y here, the
439 kernel will automatically use the first serial line, /dev/ttyS0, as
445 bool "Sparc Leon processor family"
448 If you say Y here if you are running on a SPARC-LEON processor.
449 The LEON processor is a synthesizable VHDL model of the
450 SPARC-v8 standard. LEON is part of the GRLIB collection of
451 IP cores that are distributed under GPL. GRLIB can be downloaded
452 from www.gaisler.com. You can download a sparc-linux cross-compilation
453 toolchain at www.gaisler.com.
457 menu "Bus options (PCI etc.)"
467 bool "Sun Logical Domains support"
470 Say Y here is you want to support virtual devices via
474 bool "Support for PCI and PS/2 keyboard/mouse"
476 Find out whether your system includes a PCI bus. PCI is the name of
477 a bus system, i.e. the way the CPU talks to the other stuff inside
478 your box. If you say Y here, the kernel will include drivers and
479 infrastructure code to support PCI bus devices.
481 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
482 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
483 All of these platforms are extremely obscure, so say N if unsure.
486 def_bool PCI if SPARC64
491 source "drivers/pci/Kconfig"
493 source "drivers/pcmcia/Kconfig"
495 config SUN_OPENPROMFS
496 tristate "Openprom tree appears in /proc/openprom"
498 If you say Y, the OpenPROM device tree will be available as a
499 virtual file system, which you can mount to /proc/openprom by "mount
500 -t openpromfs none /proc/openprom".
502 To compile the /proc/openprom support as a module, choose M here: the
503 module will be called openpromfs.
505 Only choose N if you know in advance that you will not need to modify
506 OpenPROM settings on the running system.
512 depends on SPARC32 && PCI
517 depends on SPARC64 && PCI
521 menu "Executable file formats"
523 source "fs/Kconfig.binfmt"
529 select COMPAT_BINFMT_ELF
531 config SYSVIPC_COMPAT
533 depends on COMPAT && SYSVIPC
540 source "drivers/Kconfig"
542 source "drivers/sbus/char/Kconfig"
546 source "arch/sparc/Kconfig.debug"
548 source "security/Kconfig"
550 source "crypto/Kconfig"