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
30 select HAVE_DMA_API_DEBUG
37 select ARCH_SUPPORTS_MSI
38 select HAVE_FUNCTION_TRACER
39 select HAVE_KRETPROBES
42 select HAVE_SYSCALL_WRAPPERS
43 select HAVE_DYNAMIC_FTRACE
44 select HAVE_FTRACE_MCOUNT_RECORD
45 select USE_GENERIC_SMP_HELPERS if SMP
49 select RTC_DRV_STARFIRE
50 select HAVE_PERF_EVENTS
54 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
55 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
57 # CONFIG_BITS can be used at source level to get 32/64 bits
67 config GENERIC_CMOS_UPDATE
71 config GENERIC_CLOCKEVENTS
83 config STACKTRACE_SUPPORT
87 config LOCKDEP_SUPPORT
91 config HAVE_LATENCYTOP_SUPPORT
99 config HAVE_SETUP_PER_CPU_AREA
100 def_bool y if SPARC64
102 config NEED_PER_CPU_EMBED_FIRST_CHUNK
103 def_bool y if SPARC64
105 config NEED_PER_CPU_PAGE_FIRST_CHUNK
106 def_bool y if SPARC64
108 config GENERIC_HARDIRQS_NO__DO_IRQ
110 def_bool y if SPARC64
124 config GENERIC_ISA_DMA
131 Generic GPIO API support
133 config ARCH_NO_VIRT_TO_BUS
139 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
140 def_bool y if SPARC64
142 source "init/Kconfig"
144 source "kernel/Kconfig.freezer"
146 menu "Processor type and features"
149 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
151 This enables support for systems with more than one CPU. If you have
152 a system with only one CPU, say N. If you have a system with more
155 If you say N here, the kernel will run on single and multiprocessor
156 machines, but will use only one CPU of a multiprocessor machine. If
157 you say Y here, the kernel will run on many, but not all,
158 singleprocessor machines. On a singleprocessor machine, the kernel
159 will run faster if you say N here.
161 People using multiprocessor machines who say Y here should also say
162 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
163 Management" code will be disabled if you say Y here.
165 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
166 available at <http://www.tldp.org/docs.html#howto>.
168 If you don't know what to do here, say N.
171 int "Maximum number of CPUs"
173 range 2 32 if SPARC32
174 range 2 1024 if SPARC64
175 default 32 if SPARC32
176 default 64 if SPARC64
178 source kernel/Kconfig.hz
180 config RWSEM_GENERIC_SPINLOCK
184 config RWSEM_XCHGADD_ALGORITHM
188 config GENERIC_FIND_NEXT_BIT
192 config GENERIC_HWEIGHT
194 default y if !ULTRA_HAS_POPULATION_COUNT
196 config GENERIC_CALIBRATE_DELAY
200 config ARCH_MAY_HAVE_PC_FDC
204 config EMULATED_CMPXCHG
208 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
209 is emulated, and therefore it is not completely atomic.
215 depends on SPARC32 && SMP
220 depends on SPARC64 && SMP
223 prompt "Kernel page size" if SPARC64
224 default SPARC64_PAGE_SIZE_8KB
226 config SPARC64_PAGE_SIZE_8KB
229 This lets you select the page size of the kernel.
231 8KB and 64KB work quite well, since SPARC ELF sections
232 provide for up to 64KB alignment.
234 If you don't know what to do, choose 8KB.
236 config SPARC64_PAGE_SIZE_64KB
242 bool "Enable seccomp to safely compute untrusted bytecode"
243 depends on SPARC64 && PROC_FS
246 This kernel feature is useful for number crunching applications
247 that may need to compute untrusted bytecode during their
248 execution. By using pipes or other transports made available to
249 the process as file descriptors supporting the read/write
250 syscalls, it's possible to isolate those applications in
251 their own address space using seccomp. Once seccomp is
252 enabled via /proc/<pid>/seccomp, it cannot be disabled
253 and the task is only allowed to execute a few safe syscalls
254 defined by each seccomp mode.
256 If unsure, say Y. Only embedded should say N here.
259 bool "Support for hot-pluggable CPUs"
260 depends on SPARC64 && SMP
263 Say Y here to experiment with turning CPUs off and on. CPUs
264 can be controlled through /sys/devices/system/cpu/cpu#.
265 Say N if you want to disable CPU hotplug.
267 config GENERIC_HARDIRQS
271 source "kernel/time/Kconfig"
274 source "drivers/cpufreq/Kconfig"
277 tristate "UltraSPARC-III CPU Frequency driver"
279 select CPU_FREQ_TABLE
281 This adds the CPUFreq driver for UltraSPARC-III processors.
283 For details, take a look at <file:Documentation/cpu-freq>.
288 tristate "UltraSPARC-IIe CPU Frequency driver"
290 select CPU_FREQ_TABLE
292 This adds the CPUFreq driver for UltraSPARC-IIe processors.
294 For details, take a look at <file:Documentation/cpu-freq>.
301 tristate "UltraSPARC-III Memory Controller driver"
305 This adds a driver for the UltraSPARC-III memory controller.
306 Loading this driver allows exact mnemonic strings to be
307 printed in the event of a memory error, so that the faulty DIMM
308 on the motherboard can be matched to the error.
310 If in doubt, say Y, as this information can be very useful.
312 # Global things across all Sun machines.
313 config GENERIC_LOCKBREAK
316 depends on SPARC64 && SMP && PREEMPT
319 prompt "SPARC64 Huge TLB Page Size"
320 depends on SPARC64 && HUGETLB_PAGE
321 default HUGETLB_PAGE_SIZE_4MB
323 config HUGETLB_PAGE_SIZE_4MB
326 config HUGETLB_PAGE_SIZE_512K
329 config HUGETLB_PAGE_SIZE_64K
330 depends on !SPARC64_PAGE_SIZE_64KB
337 depends on SPARC64 && SMP
342 depends on NEED_MULTIPLE_NODES
344 # Some NUMA nodes have memory ranges that span
345 # other nodes. Even though a pfn is valid and
346 # between a node's start and end pfns, it may not
347 # reside on that node. See memmap_init_zone()
349 config NODES_SPAN_OTHER_NODES
351 depends on NEED_MULTIPLE_NODES
353 config ARCH_POPULATES_NODE_MAP
354 def_bool y if SPARC64
356 config ARCH_SELECT_MEMORY_MODEL
357 def_bool y if SPARC64
359 config ARCH_SPARSEMEM_ENABLE
360 def_bool y if SPARC64
361 select SPARSEMEM_VMEMMAP_ENABLE
363 config ARCH_SPARSEMEM_DEFAULT
364 def_bool y if SPARC64
369 bool "SMT (Hyperthreading) scheduler support"
370 depends on SPARC64 && SMP
373 SMT scheduler support improves the CPU scheduler's decision making
374 when dealing with SPARC cpus at a cost of slightly increased overhead
375 in some places. If unsure say N here.
378 bool "Multi-core scheduler support"
379 depends on SPARC64 && SMP
382 Multi-core scheduler support improves the CPU scheduler's decision
383 making when dealing with multi-core CPU chips at a cost of slightly
384 increased overhead in some places. If unsure say N here.
387 source "kernel/Kconfig.preempt"
391 bool "Default bootloader kernel arguments"
395 string "Initial kernel command string"
396 depends on CMDLINE_BOOL
397 default "console=ttyS0,9600 root=/dev/sda1"
399 Say Y here if you want to be able to pass default arguments to
400 the kernel. This will be overridden by the bootloader, if you
401 use one (such as SILO). This is most useful if you want to boot
402 a kernel from TFTP, and want default options to be available
403 with having them passed on the command line.
405 NOTE: This option WILL override the PROM bootargs setting!
411 Enable power management and CPU standby features on supported
415 tristate "Sun4m LED driver"
418 This driver toggles the front-panel LED on sun4m systems
419 in a user-specifiable manner. Its state can be probed
420 by reading /proc/led and its blinking mode can be changed
421 via writes to /proc/led
423 config SERIAL_CONSOLE
428 If you say Y here, it will be possible to use a serial port as the
429 system console (the system console is the device which receives all
430 kernel messages and warnings and which allows logins in single user
431 mode). This could be useful if some terminal or printer is connected
434 Even if you say Y here, the currently visible virtual console
435 (/dev/tty0) will still be used as the system console by default, but
436 you can alter that using a kernel command line option such as
437 "console=ttyS1". (Try "man bootparam" or see the documentation of
438 your boot loader (silo) about how to pass options to the kernel at
441 If you don't have a graphics card installed and you say Y here, the
442 kernel will automatically use the first serial line, /dev/ttyS0, as
448 bool "Sparc Leon processor family"
451 If you say Y here if you are running on a SPARC-LEON processor.
452 The LEON processor is a synthesizable VHDL model of the
453 SPARC-v8 standard. LEON is part of the GRLIB collection of
454 IP cores that are distributed under GPL. GRLIB can be downloaded
455 from www.gaisler.com. You can download a sparc-linux cross-compilation
456 toolchain at www.gaisler.com.
460 menu "Bus options (PCI etc.)"
470 bool "Sun Logical Domains support"
473 Say Y here is you want to support virtual devices via
477 bool "Support for PCI and PS/2 keyboard/mouse"
479 Find out whether your system includes a PCI bus. PCI is the name of
480 a bus system, i.e. the way the CPU talks to the other stuff inside
481 your box. If you say Y here, the kernel will include drivers and
482 infrastructure code to support PCI bus devices.
484 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
485 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
486 All of these platforms are extremely obscure, so say N if unsure.
489 def_bool PCI if SPARC64
494 source "drivers/pci/Kconfig"
496 source "drivers/pcmcia/Kconfig"
498 config SUN_OPENPROMFS
499 tristate "Openprom tree appears in /proc/openprom"
501 If you say Y, the OpenPROM device tree will be available as a
502 virtual file system, which you can mount to /proc/openprom by "mount
503 -t openpromfs none /proc/openprom".
505 To compile the /proc/openprom support as a module, choose M here: the
506 module will be called openpromfs.
508 Only choose N if you know in advance that you will not need to modify
509 OpenPROM settings on the running system.
515 depends on SPARC32 && PCI
520 depends on SPARC64 && PCI
524 menu "Executable file formats"
526 source "fs/Kconfig.binfmt"
532 select COMPAT_BINFMT_ELF
534 config SYSVIPC_COMPAT
536 depends on COMPAT && SYSVIPC
543 source "drivers/Kconfig"
545 source "drivers/sbus/char/Kconfig"
549 source "arch/sparc/Kconfig.debug"
551 source "security/Kconfig"
553 source "crypto/Kconfig"