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 NEED_PER_CPU_PAGE_FIRST_CHUNK
108 def_bool y if SPARC64
110 config GENERIC_HARDIRQS_NO__DO_IRQ
112 def_bool y if SPARC64
126 config GENERIC_ISA_DMA
133 Generic GPIO API support
135 config ARCH_NO_VIRT_TO_BUS
141 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
142 def_bool y if SPARC64
144 source "init/Kconfig"
146 source "kernel/Kconfig.freezer"
148 menu "Processor type and features"
151 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
153 This enables support for systems with more than one CPU. If you have
154 a system with only one CPU, say N. If you have a system with more
157 If you say N here, the kernel will run on single and multiprocessor
158 machines, but will use only one CPU of a multiprocessor machine. If
159 you say Y here, the kernel will run on many, but not all,
160 singleprocessor machines. On a singleprocessor machine, the kernel
161 will run faster if you say N here.
163 People using multiprocessor machines who say Y here should also say
164 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
165 Management" code will be disabled if you say Y here.
167 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
168 available at <http://www.tldp.org/docs.html#howto>.
170 If you don't know what to do here, say N.
173 int "Maximum number of CPUs"
175 range 2 32 if SPARC32
176 range 2 1024 if SPARC64
177 default 32 if SPARC32
178 default 64 if SPARC64
180 source kernel/Kconfig.hz
182 config RWSEM_GENERIC_SPINLOCK
186 config RWSEM_XCHGADD_ALGORITHM
190 config GENERIC_FIND_NEXT_BIT
194 config GENERIC_HWEIGHT
196 default y if !ULTRA_HAS_POPULATION_COUNT
198 config GENERIC_CALIBRATE_DELAY
202 config ARCH_MAY_HAVE_PC_FDC
206 config EMULATED_CMPXCHG
210 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
211 is emulated, and therefore it is not completely atomic.
217 depends on SPARC32 && SMP
222 depends on SPARC64 && SMP
225 bool "Support for early boot text console"
229 Say Y here to enable a faster early framebuffer boot console.
232 prompt "Kernel page size" if SPARC64
233 default SPARC64_PAGE_SIZE_8KB
235 config SPARC64_PAGE_SIZE_8KB
238 This lets you select the page size of the kernel.
240 8KB and 64KB work quite well, since SPARC ELF sections
241 provide for up to 64KB alignment.
243 If you don't know what to do, choose 8KB.
245 config SPARC64_PAGE_SIZE_64KB
251 bool "Enable seccomp to safely compute untrusted bytecode"
252 depends on SPARC64 && PROC_FS
255 This kernel feature is useful for number crunching applications
256 that may need to compute untrusted bytecode during their
257 execution. By using pipes or other transports made available to
258 the process as file descriptors supporting the read/write
259 syscalls, it's possible to isolate those applications in
260 their own address space using seccomp. Once seccomp is
261 enabled via /proc/<pid>/seccomp, it cannot be disabled
262 and the task is only allowed to execute a few safe syscalls
263 defined by each seccomp mode.
265 If unsure, say Y. Only embedded should say N here.
268 bool "Support for hot-pluggable CPUs"
269 depends on SPARC64 && SMP
272 Say Y here to experiment with turning CPUs off and on. CPUs
273 can be controlled through /sys/devices/system/cpu/cpu#.
274 Say N if you want to disable CPU hotplug.
276 config GENERIC_HARDIRQS
280 source "kernel/time/Kconfig"
283 source "drivers/cpufreq/Kconfig"
286 tristate "UltraSPARC-III CPU Frequency driver"
288 select CPU_FREQ_TABLE
290 This adds the CPUFreq driver for UltraSPARC-III processors.
292 For details, take a look at <file:Documentation/cpu-freq>.
297 tristate "UltraSPARC-IIe CPU Frequency driver"
299 select CPU_FREQ_TABLE
301 This adds the CPUFreq driver for UltraSPARC-IIe processors.
303 For details, take a look at <file:Documentation/cpu-freq>.
310 tristate "UltraSPARC-III Memory Controller driver"
314 This adds a driver for the UltraSPARC-III memory controller.
315 Loading this driver allows exact mnemonic strings to be
316 printed in the event of a memory error, so that the faulty DIMM
317 on the motherboard can be matched to the error.
319 If in doubt, say Y, as this information can be very useful.
321 # Global things across all Sun machines.
322 config GENERIC_LOCKBREAK
325 depends on SPARC64 && SMP && PREEMPT
328 prompt "SPARC64 Huge TLB Page Size"
329 depends on SPARC64 && HUGETLB_PAGE
330 default HUGETLB_PAGE_SIZE_4MB
332 config HUGETLB_PAGE_SIZE_4MB
335 config HUGETLB_PAGE_SIZE_512K
338 config HUGETLB_PAGE_SIZE_64K
339 depends on !SPARC64_PAGE_SIZE_64KB
346 depends on SPARC64 && SMP
351 depends on NEED_MULTIPLE_NODES
353 # Some NUMA nodes have memory ranges that span
354 # other nodes. Even though a pfn is valid and
355 # between a node's start and end pfns, it may not
356 # reside on that node. See memmap_init_zone()
358 config NODES_SPAN_OTHER_NODES
360 depends on NEED_MULTIPLE_NODES
362 config ARCH_POPULATES_NODE_MAP
363 def_bool y if SPARC64
365 config ARCH_SELECT_MEMORY_MODEL
366 def_bool y if SPARC64
368 config ARCH_SPARSEMEM_ENABLE
369 def_bool y if SPARC64
370 select SPARSEMEM_VMEMMAP_ENABLE
372 config ARCH_SPARSEMEM_DEFAULT
373 def_bool y if SPARC64
378 bool "SMT (Hyperthreading) scheduler support"
379 depends on SPARC64 && SMP
382 SMT scheduler support improves the CPU scheduler's decision making
383 when dealing with SPARC cpus at a cost of slightly increased overhead
384 in some places. If unsure say N here.
387 bool "Multi-core scheduler support"
388 depends on SPARC64 && SMP
391 Multi-core scheduler support improves the CPU scheduler's decision
392 making when dealing with multi-core CPU chips at a cost of slightly
393 increased overhead in some places. If unsure say N here.
396 source "kernel/Kconfig.preempt"
400 bool "Default bootloader kernel arguments"
404 string "Initial kernel command string"
405 depends on CMDLINE_BOOL
406 default "console=ttyS0,9600 root=/dev/sda1"
408 Say Y here if you want to be able to pass default arguments to
409 the kernel. This will be overridden by the bootloader, if you
410 use one (such as SILO). This is most useful if you want to boot
411 a kernel from TFTP, and want default options to be available
412 with having them passed on the command line.
414 NOTE: This option WILL override the PROM bootargs setting!
420 Enable power management and CPU standby features on supported
424 tristate "Sun4m LED driver"
427 This driver toggles the front-panel LED on sun4m systems
428 in a user-specifiable manner. Its state can be probed
429 by reading /proc/led and its blinking mode can be changed
430 via writes to /proc/led
432 config SERIAL_CONSOLE
437 If you say Y here, it will be possible to use a serial port as the
438 system console (the system console is the device which receives all
439 kernel messages and warnings and which allows logins in single user
440 mode). This could be useful if some terminal or printer is connected
443 Even if you say Y here, the currently visible virtual console
444 (/dev/tty0) will still be used as the system console by default, but
445 you can alter that using a kernel command line option such as
446 "console=ttyS1". (Try "man bootparam" or see the documentation of
447 your boot loader (silo) about how to pass options to the kernel at
450 If you don't have a graphics card installed and you say Y here, the
451 kernel will automatically use the first serial line, /dev/ttyS0, as
457 bool "Sparc Leon processor family"
460 If you say Y here if you are running on a SPARC-LEON processor.
461 The LEON processor is a synthesizable VHDL model of the
462 SPARC-v8 standard. LEON is part of the GRLIB collection of
463 IP cores that are distributed under GPL. GRLIB can be downloaded
464 from www.gaisler.com. You can download a sparc-linux cross-compilation
465 toolchain at www.gaisler.com.
469 menu "Bus options (PCI etc.)"
479 bool "Sun Logical Domains support"
482 Say Y here is you want to support virtual devices via
486 bool "Support for PCI and PS/2 keyboard/mouse"
488 Find out whether your system includes a PCI bus. PCI is the name of
489 a bus system, i.e. the way the CPU talks to the other stuff inside
490 your box. If you say Y here, the kernel will include drivers and
491 infrastructure code to support PCI bus devices.
493 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
494 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
495 All of these platforms are extremely obscure, so say N if unsure.
498 def_bool PCI if SPARC64
503 source "drivers/pci/Kconfig"
505 source "drivers/pcmcia/Kconfig"
507 config SUN_OPENPROMFS
508 tristate "Openprom tree appears in /proc/openprom"
510 If you say Y, the OpenPROM device tree will be available as a
511 virtual file system, which you can mount to /proc/openprom by "mount
512 -t openpromfs none /proc/openprom".
514 To compile the /proc/openprom support as a module, choose M here: the
515 module will be called openpromfs.
517 Only choose N if you know in advance that you will not need to modify
518 OpenPROM settings on the running system.
524 depends on SPARC32 && PCI
529 depends on SPARC64 && PCI
533 menu "Executable file formats"
535 source "fs/Kconfig.binfmt"
541 select COMPAT_BINFMT_ELF
543 config SYSVIPC_COMPAT
545 depends on COMPAT && SYSVIPC
552 source "drivers/Kconfig"
554 source "drivers/sbus/char/Kconfig"
558 source "arch/sparc/Kconfig.debug"
560 source "security/Kconfig"
562 source "crypto/Kconfig"