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 GENERIC_ISA_DMA
137 Generic GPIO API support
139 config ARCH_NO_VIRT_TO_BUS
145 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
146 def_bool y if SPARC64
148 source "init/Kconfig"
150 source "kernel/Kconfig.freezer"
152 menu "Processor type and features"
155 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
157 This enables support for systems with more than one CPU. If you have
158 a system with only one CPU, say N. If you have a system with more
161 If you say N here, the kernel will run on single and multiprocessor
162 machines, but will use only one CPU of a multiprocessor machine. If
163 you say Y here, the kernel will run on many, but not all,
164 singleprocessor machines. On a singleprocessor machine, the kernel
165 will run faster if you say N here.
167 People using multiprocessor machines who say Y here should also say
168 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
169 Management" code will be disabled if you say Y here.
171 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
172 available at <http://www.tldp.org/docs.html#howto>.
174 If you don't know what to do here, say N.
177 int "Maximum number of CPUs"
179 range 2 32 if SPARC32
180 range 2 1024 if SPARC64
181 default 32 if SPARC32
182 default 64 if SPARC64
184 source kernel/Kconfig.hz
186 config RWSEM_GENERIC_SPINLOCK
190 config RWSEM_XCHGADD_ALGORITHM
194 config GENERIC_FIND_NEXT_BIT
198 config GENERIC_HWEIGHT
200 default y if !ULTRA_HAS_POPULATION_COUNT
202 config GENERIC_CALIBRATE_DELAY
206 config ARCH_MAY_HAVE_PC_FDC
210 config EMULATED_CMPXCHG
214 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
215 is emulated, and therefore it is not completely atomic.
221 depends on SPARC32 && SMP
226 depends on SPARC64 && SMP
229 bool "Support for early boot text console"
233 Say Y here to enable a faster early framebuffer boot console.
236 prompt "Kernel page size" if SPARC64
237 default SPARC64_PAGE_SIZE_8KB
239 config SPARC64_PAGE_SIZE_8KB
242 This lets you select the page size of the kernel.
244 8KB and 64KB work quite well, since SPARC ELF sections
245 provide for up to 64KB alignment.
247 If you don't know what to do, choose 8KB.
249 config SPARC64_PAGE_SIZE_64KB
255 bool "Enable seccomp to safely compute untrusted bytecode"
256 depends on SPARC64 && PROC_FS
259 This kernel feature is useful for number crunching applications
260 that may need to compute untrusted bytecode during their
261 execution. By using pipes or other transports made available to
262 the process as file descriptors supporting the read/write
263 syscalls, it's possible to isolate those applications in
264 their own address space using seccomp. Once seccomp is
265 enabled via /proc/<pid>/seccomp, it cannot be disabled
266 and the task is only allowed to execute a few safe syscalls
267 defined by each seccomp mode.
269 If unsure, say Y. Only embedded should say N here.
272 bool "Support for hot-pluggable CPUs"
273 depends on SPARC64 && SMP
276 Say Y here to experiment with turning CPUs off and on. CPUs
277 can be controlled through /sys/devices/system/cpu/cpu#.
278 Say N if you want to disable CPU hotplug.
280 config GENERIC_HARDIRQS
284 source "kernel/time/Kconfig"
287 source "drivers/cpufreq/Kconfig"
290 tristate "UltraSPARC-III CPU Frequency driver"
292 select CPU_FREQ_TABLE
294 This adds the CPUFreq driver for UltraSPARC-III processors.
296 For details, take a look at <file:Documentation/cpu-freq>.
301 tristate "UltraSPARC-IIe CPU Frequency driver"
303 select CPU_FREQ_TABLE
305 This adds the CPUFreq driver for UltraSPARC-IIe processors.
307 For details, take a look at <file:Documentation/cpu-freq>.
314 tristate "UltraSPARC-III Memory Controller driver"
318 This adds a driver for the UltraSPARC-III memory controller.
319 Loading this driver allows exact mnemonic strings to be
320 printed in the event of a memory error, so that the faulty DIMM
321 on the motherboard can be matched to the error.
323 If in doubt, say Y, as this information can be very useful.
325 # Global things across all Sun machines.
326 config GENERIC_LOCKBREAK
329 depends on SPARC64 && SMP && PREEMPT
332 prompt "SPARC64 Huge TLB Page Size"
333 depends on SPARC64 && HUGETLB_PAGE
334 default HUGETLB_PAGE_SIZE_4MB
336 config HUGETLB_PAGE_SIZE_4MB
339 config HUGETLB_PAGE_SIZE_512K
342 config HUGETLB_PAGE_SIZE_64K
343 depends on !SPARC64_PAGE_SIZE_64KB
350 depends on SPARC64 && SMP
355 depends on NEED_MULTIPLE_NODES
357 # Some NUMA nodes have memory ranges that span
358 # other nodes. Even though a pfn is valid and
359 # between a node's start and end pfns, it may not
360 # reside on that node. See memmap_init_zone()
362 config NODES_SPAN_OTHER_NODES
364 depends on NEED_MULTIPLE_NODES
366 config ARCH_POPULATES_NODE_MAP
367 def_bool y if SPARC64
369 config ARCH_SELECT_MEMORY_MODEL
370 def_bool y if SPARC64
372 config ARCH_SPARSEMEM_ENABLE
373 def_bool y if SPARC64
374 select SPARSEMEM_VMEMMAP_ENABLE
376 config ARCH_SPARSEMEM_DEFAULT
377 def_bool y if SPARC64
382 bool "SMT (Hyperthreading) scheduler support"
383 depends on SPARC64 && SMP
386 SMT scheduler support improves the CPU scheduler's decision making
387 when dealing with SPARC cpus at a cost of slightly increased overhead
388 in some places. If unsure say N here.
391 bool "Multi-core scheduler support"
392 depends on SPARC64 && SMP
395 Multi-core scheduler support improves the CPU scheduler's decision
396 making when dealing with multi-core CPU chips at a cost of slightly
397 increased overhead in some places. If unsure say N here.
400 source "kernel/Kconfig.preempt"
404 bool "Default bootloader kernel arguments"
408 string "Initial kernel command string"
409 depends on CMDLINE_BOOL
410 default "console=ttyS0,9600 root=/dev/sda1"
412 Say Y here if you want to be able to pass default arguments to
413 the kernel. This will be overridden by the bootloader, if you
414 use one (such as SILO). This is most useful if you want to boot
415 a kernel from TFTP, and want default options to be available
416 with having them passed on the command line.
418 NOTE: This option WILL override the PROM bootargs setting!
424 Enable power management and CPU standby features on supported
428 tristate "Sun4m LED driver"
431 This driver toggles the front-panel LED on sun4m systems
432 in a user-specifiable manner. Its state can be probed
433 by reading /proc/led and its blinking mode can be changed
434 via writes to /proc/led
436 config SERIAL_CONSOLE
441 If you say Y here, it will be possible to use a serial port as the
442 system console (the system console is the device which receives all
443 kernel messages and warnings and which allows logins in single user
444 mode). This could be useful if some terminal or printer is connected
447 Even if you say Y here, the currently visible virtual console
448 (/dev/tty0) will still be used as the system console by default, but
449 you can alter that using a kernel command line option such as
450 "console=ttyS1". (Try "man bootparam" or see the documentation of
451 your boot loader (silo) about how to pass options to the kernel at
454 If you don't have a graphics card installed and you say Y here, the
455 kernel will automatically use the first serial line, /dev/ttyS0, as
461 bool "Sparc Leon processor family"
464 If you say Y here if you are running on a SPARC-LEON processor.
465 The LEON processor is a synthesizable VHDL model of the
466 SPARC-v8 standard. LEON is part of the GRLIB collection of
467 IP cores that are distributed under GPL. GRLIB can be downloaded
468 from www.gaisler.com. You can download a sparc-linux cross-compilation
469 toolchain at www.gaisler.com.
473 menu "Bus options (PCI etc.)"
483 bool "Sun Logical Domains support"
486 Say Y here is you want to support virtual devices via
490 bool "Support for PCI and PS/2 keyboard/mouse"
492 Find out whether your system includes a PCI bus. PCI is the name of
493 a bus system, i.e. the way the CPU talks to the other stuff inside
494 your box. If you say Y here, the kernel will include drivers and
495 infrastructure code to support PCI bus devices.
497 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
498 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
499 All of these platforms are extremely obscure, so say N if unsure.
502 def_bool PCI if SPARC64
507 source "drivers/pci/Kconfig"
509 source "drivers/pcmcia/Kconfig"
511 config SUN_OPENPROMFS
512 tristate "Openprom tree appears in /proc/openprom"
514 If you say Y, the OpenPROM device tree will be available as a
515 virtual file system, which you can mount to /proc/openprom by "mount
516 -t openpromfs none /proc/openprom".
518 To compile the /proc/openprom support as a module, choose M here: the
519 module will be called openpromfs.
521 Only choose N if you know in advance that you will not need to modify
522 OpenPROM settings on the running system.
528 depends on SPARC32 && PCI
533 depends on SPARC64 && PCI
537 menu "Executable file formats"
539 source "fs/Kconfig.binfmt"
545 select COMPAT_BINFMT_ELF
547 config SYSVIPC_COMPAT
549 depends on COMPAT && SYSVIPC
556 source "drivers/Kconfig"
558 source "drivers/sbus/char/Kconfig"
562 source "arch/sparc/Kconfig.debug"
564 source "security/Kconfig"
566 source "crypto/Kconfig"