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 USE_GENERIC_SMP_HELPERS if SMP
50 select RTC_DRV_STARFIRE
51 select HAVE_PERF_EVENTS
52 select PERF_USE_VMALLOC
56 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
57 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
59 # CONFIG_BITS can be used at source level to get 32/64 bits
69 config GENERIC_CMOS_UPDATE
73 config GENERIC_CLOCKEVENTS
85 config STACKTRACE_SUPPORT
89 config LOCKDEP_SUPPORT
93 config HAVE_LATENCYTOP_SUPPORT
101 config HAVE_SETUP_PER_CPU_AREA
102 def_bool y if SPARC64
104 config NEED_PER_CPU_EMBED_FIRST_CHUNK
105 def_bool y if SPARC64
107 config GENERIC_HARDIRQS_NO__DO_IRQ
109 def_bool y if SPARC64
123 config GENERIC_ISA_DMA
130 Generic GPIO API support
132 config ARCH_NO_VIRT_TO_BUS
138 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
139 def_bool y if SPARC64
141 source "init/Kconfig"
143 source "kernel/Kconfig.freezer"
145 menu "Processor type and features"
148 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
150 This enables support for systems with more than one CPU. If you have
151 a system with only one CPU, say N. If you have a system with more
154 If you say N here, the kernel will run on single and multiprocessor
155 machines, but will use only one CPU of a multiprocessor machine. If
156 you say Y here, the kernel will run on many, but not all,
157 singleprocessor machines. On a singleprocessor machine, the kernel
158 will run faster if you say N here.
160 People using multiprocessor machines who say Y here should also say
161 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
162 Management" code will be disabled if you say Y here.
164 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
165 available at <http://www.tldp.org/docs.html#howto>.
167 If you don't know what to do here, say N.
170 int "Maximum number of CPUs"
172 range 2 32 if SPARC32
173 range 2 1024 if SPARC64
174 default 32 if SPARC32
175 default 64 if SPARC64
177 source kernel/Kconfig.hz
179 config RWSEM_GENERIC_SPINLOCK
183 config RWSEM_XCHGADD_ALGORITHM
187 config GENERIC_FIND_NEXT_BIT
191 config GENERIC_HWEIGHT
193 default y if !ULTRA_HAS_POPULATION_COUNT
195 config GENERIC_CALIBRATE_DELAY
199 config ARCH_MAY_HAVE_PC_FDC
203 config EMULATED_CMPXCHG
207 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
208 is emulated, and therefore it is not completely atomic.
214 depends on SPARC32 && SMP
219 depends on SPARC64 && SMP
222 prompt "Kernel page size" if SPARC64
223 default SPARC64_PAGE_SIZE_8KB
225 config SPARC64_PAGE_SIZE_8KB
228 This lets you select the page size of the kernel.
230 8KB and 64KB work quite well, since SPARC ELF sections
231 provide for up to 64KB alignment.
233 If you don't know what to do, choose 8KB.
235 config SPARC64_PAGE_SIZE_64KB
241 bool "Enable seccomp to safely compute untrusted bytecode"
242 depends on SPARC64 && PROC_FS
245 This kernel feature is useful for number crunching applications
246 that may need to compute untrusted bytecode during their
247 execution. By using pipes or other transports made available to
248 the process as file descriptors supporting the read/write
249 syscalls, it's possible to isolate those applications in
250 their own address space using seccomp. Once seccomp is
251 enabled via /proc/<pid>/seccomp, it cannot be disabled
252 and the task is only allowed to execute a few safe syscalls
253 defined by each seccomp mode.
255 If unsure, say Y. Only embedded should say N here.
258 bool "Support for hot-pluggable CPUs"
259 depends on SPARC64 && SMP
262 Say Y here to experiment with turning CPUs off and on. CPUs
263 can be controlled through /sys/devices/system/cpu/cpu#.
264 Say N if you want to disable CPU hotplug.
266 config GENERIC_HARDIRQS
270 source "kernel/time/Kconfig"
273 source "drivers/cpufreq/Kconfig"
276 tristate "UltraSPARC-III CPU Frequency driver"
278 select CPU_FREQ_TABLE
280 This adds the CPUFreq driver for UltraSPARC-III processors.
282 For details, take a look at <file:Documentation/cpu-freq>.
287 tristate "UltraSPARC-IIe CPU Frequency driver"
289 select CPU_FREQ_TABLE
291 This adds the CPUFreq driver for UltraSPARC-IIe processors.
293 For details, take a look at <file:Documentation/cpu-freq>.
300 tristate "UltraSPARC-III Memory Controller driver"
304 This adds a driver for the UltraSPARC-III memory controller.
305 Loading this driver allows exact mnemonic strings to be
306 printed in the event of a memory error, so that the faulty DIMM
307 on the motherboard can be matched to the error.
309 If in doubt, say Y, as this information can be very useful.
311 # Global things across all Sun machines.
312 config GENERIC_LOCKBREAK
315 depends on SPARC64 && SMP && PREEMPT
318 prompt "SPARC64 Huge TLB Page Size"
319 depends on SPARC64 && HUGETLB_PAGE
320 default HUGETLB_PAGE_SIZE_4MB
322 config HUGETLB_PAGE_SIZE_4MB
325 config HUGETLB_PAGE_SIZE_512K
328 config HUGETLB_PAGE_SIZE_64K
329 depends on !SPARC64_PAGE_SIZE_64KB
336 depends on SPARC64 && SMP
341 depends on NEED_MULTIPLE_NODES
343 # Some NUMA nodes have memory ranges that span
344 # other nodes. Even though a pfn is valid and
345 # between a node's start and end pfns, it may not
346 # reside on that node. See memmap_init_zone()
348 config NODES_SPAN_OTHER_NODES
350 depends on NEED_MULTIPLE_NODES
352 config ARCH_POPULATES_NODE_MAP
353 def_bool y if SPARC64
355 config ARCH_SELECT_MEMORY_MODEL
356 def_bool y if SPARC64
358 config ARCH_SPARSEMEM_ENABLE
359 def_bool y if SPARC64
360 select SPARSEMEM_VMEMMAP_ENABLE
362 config ARCH_SPARSEMEM_DEFAULT
363 def_bool y if SPARC64
368 bool "SMT (Hyperthreading) scheduler support"
369 depends on SPARC64 && SMP
372 SMT scheduler support improves the CPU scheduler's decision making
373 when dealing with SPARC cpus at a cost of slightly increased overhead
374 in some places. If unsure say N here.
377 bool "Multi-core scheduler support"
378 depends on SPARC64 && SMP
381 Multi-core scheduler support improves the CPU scheduler's decision
382 making when dealing with multi-core CPU chips at a cost of slightly
383 increased overhead in some places. If unsure say N here.
386 source "kernel/Kconfig.preempt"
390 bool "Default bootloader kernel arguments"
394 string "Initial kernel command string"
395 depends on CMDLINE_BOOL
396 default "console=ttyS0,9600 root=/dev/sda1"
398 Say Y here if you want to be able to pass default arguments to
399 the kernel. This will be overridden by the bootloader, if you
400 use one (such as SILO). This is most useful if you want to boot
401 a kernel from TFTP, and want default options to be available
402 with having them passed on the command line.
404 NOTE: This option WILL override the PROM bootargs setting!
410 Enable power management and CPU standby features on supported
414 tristate "Sun4m LED driver"
417 This driver toggles the front-panel LED on sun4m systems
418 in a user-specifiable manner. Its state can be probed
419 by reading /proc/led and its blinking mode can be changed
420 via writes to /proc/led
422 config SERIAL_CONSOLE
427 If you say Y here, it will be possible to use a serial port as the
428 system console (the system console is the device which receives all
429 kernel messages and warnings and which allows logins in single user
430 mode). This could be useful if some terminal or printer is connected
433 Even if you say Y here, the currently visible virtual console
434 (/dev/tty0) will still be used as the system console by default, but
435 you can alter that using a kernel command line option such as
436 "console=ttyS1". (Try "man bootparam" or see the documentation of
437 your boot loader (silo) about how to pass options to the kernel at
440 If you don't have a graphics card installed and you say Y here, the
441 kernel will automatically use the first serial line, /dev/ttyS0, as
447 bool "Sparc Leon processor family"
450 If you say Y here if you are running on a SPARC-LEON processor.
451 The LEON processor is a synthesizable VHDL model of the
452 SPARC-v8 standard. LEON is part of the GRLIB collection of
453 IP cores that are distributed under GPL. GRLIB can be downloaded
454 from www.gaisler.com. You can download a sparc-linux cross-compilation
455 toolchain at www.gaisler.com.
459 menu "Bus options (PCI etc.)"
469 bool "Sun Logical Domains support"
472 Say Y here is you want to support virtual devices via
476 bool "Support for PCI and PS/2 keyboard/mouse"
478 Find out whether your system includes a PCI bus. PCI is the name of
479 a bus system, i.e. the way the CPU talks to the other stuff inside
480 your box. If you say Y here, the kernel will include drivers and
481 infrastructure code to support PCI bus devices.
483 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
484 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
485 All of these platforms are extremely obscure, so say N if unsure.
488 def_bool PCI if SPARC64
493 source "drivers/pci/Kconfig"
495 source "drivers/pcmcia/Kconfig"
497 config SUN_OPENPROMFS
498 tristate "Openprom tree appears in /proc/openprom"
500 If you say Y, the OpenPROM device tree will be available as a
501 virtual file system, which you can mount to /proc/openprom by "mount
502 -t openpromfs none /proc/openprom".
504 To compile the /proc/openprom support as a module, choose M here: the
505 module will be called openpromfs.
507 Only choose N if you know in advance that you will not need to modify
508 OpenPROM settings on the running system.
514 depends on SPARC32 && PCI
519 depends on SPARC64 && PCI
523 menu "Executable file formats"
525 source "fs/Kconfig.binfmt"
531 select COMPAT_BINFMT_ELF
533 config SYSVIPC_COMPAT
535 depends on COMPAT && SYSVIPC
542 source "drivers/Kconfig"
544 source "drivers/sbus/char/Kconfig"
548 source "arch/sparc/Kconfig.debug"
550 source "security/Kconfig"
552 source "crypto/Kconfig"