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
24 select HAVE_ARCH_KGDB if !SMP || SPARC64
25 select HAVE_ARCH_TRACEHOOK
26 select ARCH_WANT_OPTIONAL_GPIOLIB
29 select HAVE_PERF_EVENTS
30 select PERF_USE_VMALLOC
32 select HAVE_DMA_API_DEBUG
39 select ARCH_SUPPORTS_MSI
40 select HAVE_FUNCTION_TRACER
41 select HAVE_FUNCTION_GRAPH_TRACER
42 select HAVE_FUNCTION_GRAPH_FP_TEST
43 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
44 select HAVE_KRETPROBES
47 select HAVE_SYSCALL_WRAPPERS
48 select HAVE_DYNAMIC_FTRACE
49 select HAVE_FTRACE_MCOUNT_RECORD
50 select HAVE_SYSCALL_TRACEPOINTS
51 select USE_GENERIC_SMP_HELPERS if SMP
55 select RTC_DRV_STARFIRE
56 select HAVE_PERF_EVENTS
57 select PERF_USE_VMALLOC
61 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
62 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
64 # CONFIG_BITS can be used at source level to get 32/64 bits
70 config ARCH_USES_GETTIMEOFFSET
74 config GENERIC_CMOS_UPDATE
78 config GENERIC_CLOCKEVENTS
90 config STACKTRACE_SUPPORT
94 config LOCKDEP_SUPPORT
98 config HAVE_LATENCYTOP_SUPPORT
106 config HAVE_SETUP_PER_CPU_AREA
107 def_bool y if SPARC64
109 config NEED_PER_CPU_EMBED_FIRST_CHUNK
110 def_bool y if SPARC64
112 config NEED_PER_CPU_PAGE_FIRST_CHUNK
113 def_bool y if SPARC64
115 config GENERIC_HARDIRQS_NO__DO_IRQ
117 def_bool y if SPARC64
131 config NEED_DMA_MAP_STATE
134 config NEED_SG_DMA_LENGTH
137 config GENERIC_ISA_DMA
144 Generic GPIO API support
146 config ARCH_NO_VIRT_TO_BUS
149 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
150 def_bool y if SPARC64
152 source "init/Kconfig"
154 source "kernel/Kconfig.freezer"
156 menu "Processor type and features"
159 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
161 This enables support for systems with more than one CPU. If you have
162 a system with only one CPU, say N. If you have a system with more
165 If you say N here, the kernel will run on single and multiprocessor
166 machines, but will use only one CPU of a multiprocessor machine. If
167 you say Y here, the kernel will run on many, but not all,
168 singleprocessor machines. On a singleprocessor machine, the kernel
169 will run faster if you say N here.
171 People using multiprocessor machines who say Y here should also say
172 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
173 Management" code will be disabled if you say Y here.
175 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
176 available at <http://www.tldp.org/docs.html#howto>.
178 If you don't know what to do here, say N.
181 int "Maximum number of CPUs"
183 range 2 32 if SPARC32
184 range 2 1024 if SPARC64
185 default 32 if SPARC32
186 default 64 if SPARC64
188 source kernel/Kconfig.hz
190 config RWSEM_GENERIC_SPINLOCK
194 config RWSEM_XCHGADD_ALGORITHM
198 config GENERIC_FIND_NEXT_BIT
202 config GENERIC_HWEIGHT
204 default y if !ULTRA_HAS_POPULATION_COUNT
206 config GENERIC_CALIBRATE_DELAY
210 config ARCH_MAY_HAVE_PC_FDC
214 config EMULATED_CMPXCHG
218 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
219 is emulated, and therefore it is not completely atomic.
225 depends on SPARC32 && SMP
230 depends on SPARC64 && SMP
233 bool "Support for early boot text console"
237 Say Y here to enable a faster early framebuffer boot console.
240 prompt "Kernel page size" if SPARC64
241 default SPARC64_PAGE_SIZE_8KB
243 config SPARC64_PAGE_SIZE_8KB
246 This lets you select the page size of the kernel.
248 8KB and 64KB work quite well, since SPARC ELF sections
249 provide for up to 64KB alignment.
251 If you don't know what to do, choose 8KB.
253 config SPARC64_PAGE_SIZE_64KB
259 bool "Enable seccomp to safely compute untrusted bytecode"
260 depends on SPARC64 && PROC_FS
263 This kernel feature is useful for number crunching applications
264 that may need to compute untrusted bytecode during their
265 execution. By using pipes or other transports made available to
266 the process as file descriptors supporting the read/write
267 syscalls, it's possible to isolate those applications in
268 their own address space using seccomp. Once seccomp is
269 enabled via /proc/<pid>/seccomp, it cannot be disabled
270 and the task is only allowed to execute a few safe syscalls
271 defined by each seccomp mode.
273 If unsure, say Y. Only embedded should say N here.
276 bool "Support for hot-pluggable CPUs"
277 depends on SPARC64 && SMP
280 Say Y here to experiment with turning CPUs off and on. CPUs
281 can be controlled through /sys/devices/system/cpu/cpu#.
282 Say N if you want to disable CPU hotplug.
284 config GENERIC_HARDIRQS
288 source "kernel/time/Kconfig"
291 source "drivers/cpufreq/Kconfig"
294 tristate "UltraSPARC-III CPU Frequency driver"
296 select CPU_FREQ_TABLE
298 This adds the CPUFreq driver for UltraSPARC-III processors.
300 For details, take a look at <file:Documentation/cpu-freq>.
305 tristate "UltraSPARC-IIe CPU Frequency driver"
307 select CPU_FREQ_TABLE
309 This adds the CPUFreq driver for UltraSPARC-IIe processors.
311 For details, take a look at <file:Documentation/cpu-freq>.
318 tristate "UltraSPARC-III Memory Controller driver"
322 This adds a driver for the UltraSPARC-III memory controller.
323 Loading this driver allows exact mnemonic strings to be
324 printed in the event of a memory error, so that the faulty DIMM
325 on the motherboard can be matched to the error.
327 If in doubt, say Y, as this information can be very useful.
329 # Global things across all Sun machines.
330 config GENERIC_LOCKBREAK
333 depends on SPARC64 && SMP && PREEMPT
336 prompt "SPARC64 Huge TLB Page Size"
337 depends on SPARC64 && HUGETLB_PAGE
338 default HUGETLB_PAGE_SIZE_4MB
340 config HUGETLB_PAGE_SIZE_4MB
343 config HUGETLB_PAGE_SIZE_512K
346 config HUGETLB_PAGE_SIZE_64K
347 depends on !SPARC64_PAGE_SIZE_64KB
354 depends on SPARC64 && SMP
359 depends on NEED_MULTIPLE_NODES
361 # Some NUMA nodes have memory ranges that span
362 # other nodes. Even though a pfn is valid and
363 # between a node's start and end pfns, it may not
364 # reside on that node. See memmap_init_zone()
366 config NODES_SPAN_OTHER_NODES
368 depends on NEED_MULTIPLE_NODES
370 config ARCH_POPULATES_NODE_MAP
371 def_bool y if SPARC64
373 config ARCH_SELECT_MEMORY_MODEL
374 def_bool y if SPARC64
376 config ARCH_SPARSEMEM_ENABLE
377 def_bool y if SPARC64
378 select SPARSEMEM_VMEMMAP_ENABLE
380 config ARCH_SPARSEMEM_DEFAULT
381 def_bool y if SPARC64
386 bool "SMT (Hyperthreading) scheduler support"
387 depends on SPARC64 && SMP
390 SMT scheduler support improves the CPU scheduler's decision making
391 when dealing with SPARC cpus at a cost of slightly increased overhead
392 in some places. If unsure say N here.
395 bool "Multi-core scheduler support"
396 depends on SPARC64 && SMP
399 Multi-core scheduler support improves the CPU scheduler's decision
400 making when dealing with multi-core CPU chips at a cost of slightly
401 increased overhead in some places. If unsure say N here.
404 source "kernel/Kconfig.preempt"
408 bool "Default bootloader kernel arguments"
412 string "Initial kernel command string"
413 depends on CMDLINE_BOOL
414 default "console=ttyS0,9600 root=/dev/sda1"
416 Say Y here if you want to be able to pass default arguments to
417 the kernel. This will be overridden by the bootloader, if you
418 use one (such as SILO). This is most useful if you want to boot
419 a kernel from TFTP, and want default options to be available
420 with having them passed on the command line.
422 NOTE: This option WILL override the PROM bootargs setting!
428 Enable power management and CPU standby features on supported
432 tristate "Sun4m LED driver"
435 This driver toggles the front-panel LED on sun4m systems
436 in a user-specifiable manner. Its state can be probed
437 by reading /proc/led and its blinking mode can be changed
438 via writes to /proc/led
440 config SERIAL_CONSOLE
445 If you say Y here, it will be possible to use a serial port as the
446 system console (the system console is the device which receives all
447 kernel messages and warnings and which allows logins in single user
448 mode). This could be useful if some terminal or printer is connected
451 Even if you say Y here, the currently visible virtual console
452 (/dev/tty0) will still be used as the system console by default, but
453 you can alter that using a kernel command line option such as
454 "console=ttyS1". (Try "man bootparam" or see the documentation of
455 your boot loader (silo) about how to pass options to the kernel at
458 If you don't have a graphics card installed and you say Y here, the
459 kernel will automatically use the first serial line, /dev/ttyS0, as
465 bool "Sparc Leon processor family"
468 If you say Y here if you are running on a SPARC-LEON processor.
469 The LEON processor is a synthesizable VHDL model of the
470 SPARC-v8 standard. LEON is part of the GRLIB collection of
471 IP cores that are distributed under GPL. GRLIB can be downloaded
472 from www.gaisler.com. You can download a sparc-linux cross-compilation
473 toolchain at www.gaisler.com.
477 menu "Bus options (PCI etc.)"
487 bool "Sun Logical Domains support"
490 Say Y here is you want to support virtual devices via
494 bool "Support for PCI and PS/2 keyboard/mouse"
496 Find out whether your system includes a PCI bus. PCI is the name of
497 a bus system, i.e. the way the CPU talks to the other stuff inside
498 your box. If you say Y here, the kernel will include drivers and
499 infrastructure code to support PCI bus devices.
501 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
502 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
503 All of these platforms are extremely obscure, so say N if unsure.
506 def_bool PCI if SPARC64
511 source "drivers/pci/Kconfig"
513 source "drivers/pcmcia/Kconfig"
515 config SUN_OPENPROMFS
516 tristate "Openprom tree appears in /proc/openprom"
518 If you say Y, the OpenPROM device tree will be available as a
519 virtual file system, which you can mount to /proc/openprom by "mount
520 -t openpromfs none /proc/openprom".
522 To compile the /proc/openprom support as a module, choose M here: the
523 module will be called openpromfs.
525 Only choose N if you know in advance that you will not need to modify
526 OpenPROM settings on the running system.
532 depends on SPARC32 && PCI
537 depends on SPARC64 && PCI
541 menu "Executable file formats"
543 source "fs/Kconfig.binfmt"
549 select COMPAT_BINFMT_ELF
551 config SYSVIPC_COMPAT
553 depends on COMPAT && SYSVIPC
560 source "drivers/Kconfig"
562 source "drivers/sbus/char/Kconfig"
566 source "arch/sparc/Kconfig.debug"
568 source "security/Kconfig"
570 source "crypto/Kconfig"