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_FUNCTION_GRAPH_TRACER
41 select HAVE_FUNCTION_GRAPH_FP_TEST
42 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
43 select HAVE_KRETPROBES
46 select HAVE_SYSCALL_WRAPPERS
47 select HAVE_DYNAMIC_FTRACE
48 select HAVE_FTRACE_MCOUNT_RECORD
49 select HAVE_SYSCALL_TRACEPOINTS
50 select USE_GENERIC_SMP_HELPERS if SMP
54 select RTC_DRV_STARFIRE
55 select HAVE_PERF_EVENTS
56 select PERF_USE_VMALLOC
60 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
61 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
63 # CONFIG_BITS can be used at source level to get 32/64 bits
72 config ARCH_USES_GETTIMEOFFSET
76 config GENERIC_CMOS_UPDATE
80 config GENERIC_CLOCKEVENTS
92 config STACKTRACE_SUPPORT
96 config LOCKDEP_SUPPORT
100 config HAVE_LATENCYTOP_SUPPORT
108 config HAVE_SETUP_PER_CPU_AREA
109 def_bool y if SPARC64
111 config NEED_PER_CPU_EMBED_FIRST_CHUNK
112 def_bool y if SPARC64
114 config NEED_PER_CPU_PAGE_FIRST_CHUNK
115 def_bool y if SPARC64
117 config GENERIC_HARDIRQS_NO__DO_IRQ
119 def_bool y if SPARC64
133 config NEED_DMA_MAP_STATE
136 config NEED_SG_DMA_LENGTH
139 config GENERIC_ISA_DMA
146 Generic GPIO API support
148 config ARCH_NO_VIRT_TO_BUS
154 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
155 def_bool y if SPARC64
157 source "init/Kconfig"
159 source "kernel/Kconfig.freezer"
161 menu "Processor type and features"
164 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
166 This enables support for systems with more than one CPU. If you have
167 a system with only one CPU, say N. If you have a system with more
170 If you say N here, the kernel will run on single and multiprocessor
171 machines, but will use only one CPU of a multiprocessor machine. If
172 you say Y here, the kernel will run on many, but not all,
173 singleprocessor machines. On a singleprocessor machine, the kernel
174 will run faster if you say N here.
176 People using multiprocessor machines who say Y here should also say
177 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
178 Management" code will be disabled if you say Y here.
180 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
181 available at <http://www.tldp.org/docs.html#howto>.
183 If you don't know what to do here, say N.
186 int "Maximum number of CPUs"
188 range 2 32 if SPARC32
189 range 2 1024 if SPARC64
190 default 32 if SPARC32
191 default 64 if SPARC64
193 source kernel/Kconfig.hz
195 config RWSEM_GENERIC_SPINLOCK
199 config RWSEM_XCHGADD_ALGORITHM
203 config GENERIC_FIND_NEXT_BIT
207 config GENERIC_HWEIGHT
209 default y if !ULTRA_HAS_POPULATION_COUNT
211 config GENERIC_CALIBRATE_DELAY
215 config ARCH_MAY_HAVE_PC_FDC
219 config EMULATED_CMPXCHG
223 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
224 is emulated, and therefore it is not completely atomic.
230 depends on SPARC32 && SMP
235 depends on SPARC64 && SMP
238 bool "Support for early boot text console"
242 Say Y here to enable a faster early framebuffer boot console.
245 prompt "Kernel page size" if SPARC64
246 default SPARC64_PAGE_SIZE_8KB
248 config SPARC64_PAGE_SIZE_8KB
251 This lets you select the page size of the kernel.
253 8KB and 64KB work quite well, since SPARC ELF sections
254 provide for up to 64KB alignment.
256 If you don't know what to do, choose 8KB.
258 config SPARC64_PAGE_SIZE_64KB
264 bool "Enable seccomp to safely compute untrusted bytecode"
265 depends on SPARC64 && PROC_FS
268 This kernel feature is useful for number crunching applications
269 that may need to compute untrusted bytecode during their
270 execution. By using pipes or other transports made available to
271 the process as file descriptors supporting the read/write
272 syscalls, it's possible to isolate those applications in
273 their own address space using seccomp. Once seccomp is
274 enabled via /proc/<pid>/seccomp, it cannot be disabled
275 and the task is only allowed to execute a few safe syscalls
276 defined by each seccomp mode.
278 If unsure, say Y. Only embedded should say N here.
281 bool "Support for hot-pluggable CPUs"
282 depends on SPARC64 && SMP
285 Say Y here to experiment with turning CPUs off and on. CPUs
286 can be controlled through /sys/devices/system/cpu/cpu#.
287 Say N if you want to disable CPU hotplug.
289 config GENERIC_HARDIRQS
293 source "kernel/time/Kconfig"
296 source "drivers/cpufreq/Kconfig"
299 tristate "UltraSPARC-III CPU Frequency driver"
301 select CPU_FREQ_TABLE
303 This adds the CPUFreq driver for UltraSPARC-III processors.
305 For details, take a look at <file:Documentation/cpu-freq>.
310 tristate "UltraSPARC-IIe CPU Frequency driver"
312 select CPU_FREQ_TABLE
314 This adds the CPUFreq driver for UltraSPARC-IIe processors.
316 For details, take a look at <file:Documentation/cpu-freq>.
323 tristate "UltraSPARC-III Memory Controller driver"
327 This adds a driver for the UltraSPARC-III memory controller.
328 Loading this driver allows exact mnemonic strings to be
329 printed in the event of a memory error, so that the faulty DIMM
330 on the motherboard can be matched to the error.
332 If in doubt, say Y, as this information can be very useful.
334 # Global things across all Sun machines.
335 config GENERIC_LOCKBREAK
338 depends on SPARC64 && SMP && PREEMPT
341 prompt "SPARC64 Huge TLB Page Size"
342 depends on SPARC64 && HUGETLB_PAGE
343 default HUGETLB_PAGE_SIZE_4MB
345 config HUGETLB_PAGE_SIZE_4MB
348 config HUGETLB_PAGE_SIZE_512K
351 config HUGETLB_PAGE_SIZE_64K
352 depends on !SPARC64_PAGE_SIZE_64KB
359 depends on SPARC64 && SMP
364 depends on NEED_MULTIPLE_NODES
366 # Some NUMA nodes have memory ranges that span
367 # other nodes. Even though a pfn is valid and
368 # between a node's start and end pfns, it may not
369 # reside on that node. See memmap_init_zone()
371 config NODES_SPAN_OTHER_NODES
373 depends on NEED_MULTIPLE_NODES
375 config ARCH_POPULATES_NODE_MAP
376 def_bool y if SPARC64
378 config ARCH_SELECT_MEMORY_MODEL
379 def_bool y if SPARC64
381 config ARCH_SPARSEMEM_ENABLE
382 def_bool y if SPARC64
383 select SPARSEMEM_VMEMMAP_ENABLE
385 config ARCH_SPARSEMEM_DEFAULT
386 def_bool y if SPARC64
391 bool "SMT (Hyperthreading) scheduler support"
392 depends on SPARC64 && SMP
395 SMT scheduler support improves the CPU scheduler's decision making
396 when dealing with SPARC cpus at a cost of slightly increased overhead
397 in some places. If unsure say N here.
400 bool "Multi-core scheduler support"
401 depends on SPARC64 && SMP
404 Multi-core scheduler support improves the CPU scheduler's decision
405 making when dealing with multi-core CPU chips at a cost of slightly
406 increased overhead in some places. If unsure say N here.
409 source "kernel/Kconfig.preempt"
413 bool "Default bootloader kernel arguments"
417 string "Initial kernel command string"
418 depends on CMDLINE_BOOL
419 default "console=ttyS0,9600 root=/dev/sda1"
421 Say Y here if you want to be able to pass default arguments to
422 the kernel. This will be overridden by the bootloader, if you
423 use one (such as SILO). This is most useful if you want to boot
424 a kernel from TFTP, and want default options to be available
425 with having them passed on the command line.
427 NOTE: This option WILL override the PROM bootargs setting!
433 Enable power management and CPU standby features on supported
437 tristate "Sun4m LED driver"
440 This driver toggles the front-panel LED on sun4m systems
441 in a user-specifiable manner. Its state can be probed
442 by reading /proc/led and its blinking mode can be changed
443 via writes to /proc/led
445 config SERIAL_CONSOLE
450 If you say Y here, it will be possible to use a serial port as the
451 system console (the system console is the device which receives all
452 kernel messages and warnings and which allows logins in single user
453 mode). This could be useful if some terminal or printer is connected
456 Even if you say Y here, the currently visible virtual console
457 (/dev/tty0) will still be used as the system console by default, but
458 you can alter that using a kernel command line option such as
459 "console=ttyS1". (Try "man bootparam" or see the documentation of
460 your boot loader (silo) about how to pass options to the kernel at
463 If you don't have a graphics card installed and you say Y here, the
464 kernel will automatically use the first serial line, /dev/ttyS0, as
470 bool "Sparc Leon processor family"
473 If you say Y here if you are running on a SPARC-LEON processor.
474 The LEON processor is a synthesizable VHDL model of the
475 SPARC-v8 standard. LEON is part of the GRLIB collection of
476 IP cores that are distributed under GPL. GRLIB can be downloaded
477 from www.gaisler.com. You can download a sparc-linux cross-compilation
478 toolchain at www.gaisler.com.
482 menu "Bus options (PCI etc.)"
492 bool "Sun Logical Domains support"
495 Say Y here is you want to support virtual devices via
499 bool "Support for PCI and PS/2 keyboard/mouse"
501 Find out whether your system includes a PCI bus. PCI is the name of
502 a bus system, i.e. the way the CPU talks to the other stuff inside
503 your box. If you say Y here, the kernel will include drivers and
504 infrastructure code to support PCI bus devices.
506 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
507 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
508 All of these platforms are extremely obscure, so say N if unsure.
511 def_bool PCI if SPARC64
516 source "drivers/pci/Kconfig"
518 source "drivers/pcmcia/Kconfig"
520 config SUN_OPENPROMFS
521 tristate "Openprom tree appears in /proc/openprom"
523 If you say Y, the OpenPROM device tree will be available as a
524 virtual file system, which you can mount to /proc/openprom by "mount
525 -t openpromfs none /proc/openprom".
527 To compile the /proc/openprom support as a module, choose M here: the
528 module will be called openpromfs.
530 Only choose N if you know in advance that you will not need to modify
531 OpenPROM settings on the running system.
537 depends on SPARC32 && PCI
542 depends on SPARC64 && PCI
546 menu "Executable file formats"
548 source "fs/Kconfig.binfmt"
554 select COMPAT_BINFMT_ELF
556 config SYSVIPC_COMPAT
558 depends on COMPAT && SYSVIPC
565 source "drivers/Kconfig"
567 source "drivers/sbus/char/Kconfig"
571 source "arch/sparc/Kconfig.debug"
573 source "security/Kconfig"
575 source "crypto/Kconfig"