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_EVENTS
29 select PERF_USE_VMALLOC
31 select HAVE_DMA_API_DEBUG
38 select ARCH_SUPPORTS_MSI
39 select HAVE_FUNCTION_TRACER
40 select HAVE_KRETPROBES
43 select HAVE_SYSCALL_WRAPPERS
44 select HAVE_DYNAMIC_FTRACE
45 select HAVE_FTRACE_MCOUNT_RECORD
46 select HAVE_SYSCALL_TRACEPOINTS
47 select USE_GENERIC_SMP_HELPERS if SMP
51 select RTC_DRV_STARFIRE
52 select HAVE_PERF_EVENTS
53 select PERF_USE_VMALLOC
57 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
58 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
60 # CONFIG_BITS can be used at source level to get 32/64 bits
69 config ARCH_USES_GETTIMEOFFSET
73 config GENERIC_CMOS_UPDATE
77 config GENERIC_CLOCKEVENTS
89 config STACKTRACE_SUPPORT
93 config LOCKDEP_SUPPORT
97 config HAVE_LATENCYTOP_SUPPORT
105 config HAVE_SETUP_PER_CPU_AREA
106 def_bool y if SPARC64
108 config NEED_PER_CPU_EMBED_FIRST_CHUNK
109 def_bool y if SPARC64
111 config NEED_PER_CPU_PAGE_FIRST_CHUNK
112 def_bool y if SPARC64
114 config GENERIC_HARDIRQS_NO__DO_IRQ
116 def_bool y if SPARC64
130 config NEED_DMA_MAP_STATE
133 config GENERIC_ISA_DMA
140 Generic GPIO API support
142 config ARCH_NO_VIRT_TO_BUS
148 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
149 def_bool y if SPARC64
151 source "init/Kconfig"
153 source "kernel/Kconfig.freezer"
155 menu "Processor type and features"
158 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
160 This enables support for systems with more than one CPU. If you have
161 a system with only one CPU, say N. If you have a system with more
164 If you say N here, the kernel will run on single and multiprocessor
165 machines, but will use only one CPU of a multiprocessor machine. If
166 you say Y here, the kernel will run on many, but not all,
167 singleprocessor machines. On a singleprocessor machine, the kernel
168 will run faster if you say N here.
170 People using multiprocessor machines who say Y here should also say
171 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
172 Management" code will be disabled if you say Y here.
174 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
175 available at <http://www.tldp.org/docs.html#howto>.
177 If you don't know what to do here, say N.
180 int "Maximum number of CPUs"
182 range 2 32 if SPARC32
183 range 2 1024 if SPARC64
184 default 32 if SPARC32
185 default 64 if SPARC64
187 source kernel/Kconfig.hz
189 config RWSEM_GENERIC_SPINLOCK
193 config RWSEM_XCHGADD_ALGORITHM
197 config GENERIC_FIND_NEXT_BIT
201 config GENERIC_HWEIGHT
203 default y if !ULTRA_HAS_POPULATION_COUNT
205 config GENERIC_CALIBRATE_DELAY
209 config ARCH_MAY_HAVE_PC_FDC
213 config EMULATED_CMPXCHG
217 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
218 is emulated, and therefore it is not completely atomic.
224 depends on SPARC32 && SMP
229 depends on SPARC64 && SMP
232 bool "Support for early boot text console"
236 Say Y here to enable a faster early framebuffer boot console.
239 prompt "Kernel page size" if SPARC64
240 default SPARC64_PAGE_SIZE_8KB
242 config SPARC64_PAGE_SIZE_8KB
245 This lets you select the page size of the kernel.
247 8KB and 64KB work quite well, since SPARC ELF sections
248 provide for up to 64KB alignment.
250 If you don't know what to do, choose 8KB.
252 config SPARC64_PAGE_SIZE_64KB
258 bool "Enable seccomp to safely compute untrusted bytecode"
259 depends on SPARC64 && PROC_FS
262 This kernel feature is useful for number crunching applications
263 that may need to compute untrusted bytecode during their
264 execution. By using pipes or other transports made available to
265 the process as file descriptors supporting the read/write
266 syscalls, it's possible to isolate those applications in
267 their own address space using seccomp. Once seccomp is
268 enabled via /proc/<pid>/seccomp, it cannot be disabled
269 and the task is only allowed to execute a few safe syscalls
270 defined by each seccomp mode.
272 If unsure, say Y. Only embedded should say N here.
275 bool "Support for hot-pluggable CPUs"
276 depends on SPARC64 && SMP
279 Say Y here to experiment with turning CPUs off and on. CPUs
280 can be controlled through /sys/devices/system/cpu/cpu#.
281 Say N if you want to disable CPU hotplug.
283 config GENERIC_HARDIRQS
287 source "kernel/time/Kconfig"
290 source "drivers/cpufreq/Kconfig"
293 tristate "UltraSPARC-III CPU Frequency driver"
295 select CPU_FREQ_TABLE
297 This adds the CPUFreq driver for UltraSPARC-III processors.
299 For details, take a look at <file:Documentation/cpu-freq>.
304 tristate "UltraSPARC-IIe CPU Frequency driver"
306 select CPU_FREQ_TABLE
308 This adds the CPUFreq driver for UltraSPARC-IIe processors.
310 For details, take a look at <file:Documentation/cpu-freq>.
317 tristate "UltraSPARC-III Memory Controller driver"
321 This adds a driver for the UltraSPARC-III memory controller.
322 Loading this driver allows exact mnemonic strings to be
323 printed in the event of a memory error, so that the faulty DIMM
324 on the motherboard can be matched to the error.
326 If in doubt, say Y, as this information can be very useful.
328 # Global things across all Sun machines.
329 config GENERIC_LOCKBREAK
332 depends on SPARC64 && SMP && PREEMPT
335 prompt "SPARC64 Huge TLB Page Size"
336 depends on SPARC64 && HUGETLB_PAGE
337 default HUGETLB_PAGE_SIZE_4MB
339 config HUGETLB_PAGE_SIZE_4MB
342 config HUGETLB_PAGE_SIZE_512K
345 config HUGETLB_PAGE_SIZE_64K
346 depends on !SPARC64_PAGE_SIZE_64KB
353 depends on SPARC64 && SMP
358 depends on NEED_MULTIPLE_NODES
360 # Some NUMA nodes have memory ranges that span
361 # other nodes. Even though a pfn is valid and
362 # between a node's start and end pfns, it may not
363 # reside on that node. See memmap_init_zone()
365 config NODES_SPAN_OTHER_NODES
367 depends on NEED_MULTIPLE_NODES
369 config ARCH_POPULATES_NODE_MAP
370 def_bool y if SPARC64
372 config ARCH_SELECT_MEMORY_MODEL
373 def_bool y if SPARC64
375 config ARCH_SPARSEMEM_ENABLE
376 def_bool y if SPARC64
377 select SPARSEMEM_VMEMMAP_ENABLE
379 config ARCH_SPARSEMEM_DEFAULT
380 def_bool y if SPARC64
385 bool "SMT (Hyperthreading) scheduler support"
386 depends on SPARC64 && SMP
389 SMT scheduler support improves the CPU scheduler's decision making
390 when dealing with SPARC cpus at a cost of slightly increased overhead
391 in some places. If unsure say N here.
394 bool "Multi-core scheduler support"
395 depends on SPARC64 && SMP
398 Multi-core scheduler support improves the CPU scheduler's decision
399 making when dealing with multi-core CPU chips at a cost of slightly
400 increased overhead in some places. If unsure say N here.
403 source "kernel/Kconfig.preempt"
407 bool "Default bootloader kernel arguments"
411 string "Initial kernel command string"
412 depends on CMDLINE_BOOL
413 default "console=ttyS0,9600 root=/dev/sda1"
415 Say Y here if you want to be able to pass default arguments to
416 the kernel. This will be overridden by the bootloader, if you
417 use one (such as SILO). This is most useful if you want to boot
418 a kernel from TFTP, and want default options to be available
419 with having them passed on the command line.
421 NOTE: This option WILL override the PROM bootargs setting!
427 Enable power management and CPU standby features on supported
431 tristate "Sun4m LED driver"
434 This driver toggles the front-panel LED on sun4m systems
435 in a user-specifiable manner. Its state can be probed
436 by reading /proc/led and its blinking mode can be changed
437 via writes to /proc/led
439 config SERIAL_CONSOLE
444 If you say Y here, it will be possible to use a serial port as the
445 system console (the system console is the device which receives all
446 kernel messages and warnings and which allows logins in single user
447 mode). This could be useful if some terminal or printer is connected
450 Even if you say Y here, the currently visible virtual console
451 (/dev/tty0) will still be used as the system console by default, but
452 you can alter that using a kernel command line option such as
453 "console=ttyS1". (Try "man bootparam" or see the documentation of
454 your boot loader (silo) about how to pass options to the kernel at
457 If you don't have a graphics card installed and you say Y here, the
458 kernel will automatically use the first serial line, /dev/ttyS0, as
464 bool "Sparc Leon processor family"
467 If you say Y here if you are running on a SPARC-LEON processor.
468 The LEON processor is a synthesizable VHDL model of the
469 SPARC-v8 standard. LEON is part of the GRLIB collection of
470 IP cores that are distributed under GPL. GRLIB can be downloaded
471 from www.gaisler.com. You can download a sparc-linux cross-compilation
472 toolchain at www.gaisler.com.
476 menu "Bus options (PCI etc.)"
486 bool "Sun Logical Domains support"
489 Say Y here is you want to support virtual devices via
493 bool "Support for PCI and PS/2 keyboard/mouse"
495 Find out whether your system includes a PCI bus. PCI is the name of
496 a bus system, i.e. the way the CPU talks to the other stuff inside
497 your box. If you say Y here, the kernel will include drivers and
498 infrastructure code to support PCI bus devices.
500 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
501 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
502 All of these platforms are extremely obscure, so say N if unsure.
505 def_bool PCI if SPARC64
510 source "drivers/pci/Kconfig"
512 source "drivers/pcmcia/Kconfig"
514 config SUN_OPENPROMFS
515 tristate "Openprom tree appears in /proc/openprom"
517 If you say Y, the OpenPROM device tree will be available as a
518 virtual file system, which you can mount to /proc/openprom by "mount
519 -t openpromfs none /proc/openprom".
521 To compile the /proc/openprom support as a module, choose M here: the
522 module will be called openpromfs.
524 Only choose N if you know in advance that you will not need to modify
525 OpenPROM settings on the running system.
531 depends on SPARC32 && PCI
536 depends on SPARC64 && PCI
540 menu "Executable file formats"
542 source "fs/Kconfig.binfmt"
548 select COMPAT_BINFMT_ELF
550 config SYSVIPC_COMPAT
552 depends on COMPAT && SYSVIPC
559 source "drivers/Kconfig"
561 source "drivers/sbus/char/Kconfig"
565 source "arch/sparc/Kconfig.debug"
567 source "security/Kconfig"
569 source "crypto/Kconfig"