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
25 select HAVE_ARCH_KGDB if !SMP || SPARC64
26 select HAVE_ARCH_TRACEHOOK
27 select ARCH_WANT_OPTIONAL_GPIOLIB
30 select HAVE_PERF_EVENTS
31 select PERF_USE_VMALLOC
33 select HAVE_DMA_API_DEBUG
40 select ARCH_SUPPORTS_MSI
41 select HAVE_FUNCTION_TRACER
42 select HAVE_FUNCTION_GRAPH_TRACER
43 select HAVE_FUNCTION_GRAPH_FP_TEST
44 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
45 select HAVE_KRETPROBES
48 select HAVE_SYSCALL_WRAPPERS
49 select HAVE_DYNAMIC_FTRACE
50 select HAVE_FTRACE_MCOUNT_RECORD
51 select HAVE_SYSCALL_TRACEPOINTS
52 select USE_GENERIC_SMP_HELPERS if SMP
56 select RTC_DRV_STARFIRE
57 select HAVE_PERF_EVENTS
58 select PERF_USE_VMALLOC
62 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
63 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
65 # CONFIG_BITS can be used at source level to get 32/64 bits
71 config ARCH_USES_GETTIMEOFFSET
75 config GENERIC_CMOS_UPDATE
79 config GENERIC_CLOCKEVENTS
91 config STACKTRACE_SUPPORT
95 config LOCKDEP_SUPPORT
99 config HAVE_LATENCYTOP_SUPPORT
107 config HAVE_SETUP_PER_CPU_AREA
108 def_bool y if SPARC64
110 config NEED_PER_CPU_EMBED_FIRST_CHUNK
111 def_bool y if SPARC64
113 config NEED_PER_CPU_PAGE_FIRST_CHUNK
114 def_bool y if SPARC64
116 config GENERIC_HARDIRQS_NO__DO_IRQ
118 def_bool y if SPARC64
132 config NEED_DMA_MAP_STATE
135 config NEED_SG_DMA_LENGTH
138 config GENERIC_ISA_DMA
145 Generic GPIO API support
147 config ARCH_NO_VIRT_TO_BUS
150 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
151 def_bool y if SPARC64
153 source "init/Kconfig"
155 source "kernel/Kconfig.freezer"
157 menu "Processor type and features"
160 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
162 This enables support for systems with more than one CPU. If you have
163 a system with only one CPU, say N. If you have a system with more
166 If you say N here, the kernel will run on single and multiprocessor
167 machines, but will use only one CPU of a multiprocessor machine. If
168 you say Y here, the kernel will run on many, but not all,
169 singleprocessor machines. On a singleprocessor machine, the kernel
170 will run faster if you say N here.
172 People using multiprocessor machines who say Y here should also say
173 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
174 Management" code will be disabled if you say Y here.
176 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
177 available at <http://www.tldp.org/docs.html#howto>.
179 If you don't know what to do here, say N.
182 int "Maximum number of CPUs"
184 range 2 32 if SPARC32
185 range 2 1024 if SPARC64
186 default 32 if SPARC32
187 default 64 if SPARC64
189 source kernel/Kconfig.hz
191 config RWSEM_GENERIC_SPINLOCK
195 config RWSEM_XCHGADD_ALGORITHM
199 config GENERIC_FIND_NEXT_BIT
203 config GENERIC_HWEIGHT
205 default y if !ULTRA_HAS_POPULATION_COUNT
207 config GENERIC_CALIBRATE_DELAY
211 config ARCH_MAY_HAVE_PC_FDC
215 config EMULATED_CMPXCHG
219 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
220 is emulated, and therefore it is not completely atomic.
226 depends on SPARC32 && SMP
231 depends on SPARC64 && SMP
234 bool "Support for early boot text console"
238 Say Y here to enable a faster early framebuffer boot console.
241 prompt "Kernel page size" if SPARC64
242 default SPARC64_PAGE_SIZE_8KB
244 config SPARC64_PAGE_SIZE_8KB
247 This lets you select the page size of the kernel.
249 8KB and 64KB work quite well, since SPARC ELF sections
250 provide for up to 64KB alignment.
252 If you don't know what to do, choose 8KB.
254 config SPARC64_PAGE_SIZE_64KB
260 bool "Enable seccomp to safely compute untrusted bytecode"
261 depends on SPARC64 && PROC_FS
264 This kernel feature is useful for number crunching applications
265 that may need to compute untrusted bytecode during their
266 execution. By using pipes or other transports made available to
267 the process as file descriptors supporting the read/write
268 syscalls, it's possible to isolate those applications in
269 their own address space using seccomp. Once seccomp is
270 enabled via /proc/<pid>/seccomp, it cannot be disabled
271 and the task is only allowed to execute a few safe syscalls
272 defined by each seccomp mode.
274 If unsure, say Y. Only embedded should say N here.
277 bool "Support for hot-pluggable CPUs"
278 depends on SPARC64 && SMP
281 Say Y here to experiment with turning CPUs off and on. CPUs
282 can be controlled through /sys/devices/system/cpu/cpu#.
283 Say N if you want to disable CPU hotplug.
285 config GENERIC_HARDIRQS
289 source "kernel/time/Kconfig"
292 source "drivers/cpufreq/Kconfig"
295 tristate "UltraSPARC-III CPU Frequency driver"
297 select CPU_FREQ_TABLE
299 This adds the CPUFreq driver for UltraSPARC-III processors.
301 For details, take a look at <file:Documentation/cpu-freq>.
306 tristate "UltraSPARC-IIe CPU Frequency driver"
308 select CPU_FREQ_TABLE
310 This adds the CPUFreq driver for UltraSPARC-IIe processors.
312 For details, take a look at <file:Documentation/cpu-freq>.
319 tristate "UltraSPARC-III Memory Controller driver"
323 This adds a driver for the UltraSPARC-III memory controller.
324 Loading this driver allows exact mnemonic strings to be
325 printed in the event of a memory error, so that the faulty DIMM
326 on the motherboard can be matched to the error.
328 If in doubt, say Y, as this information can be very useful.
330 # Global things across all Sun machines.
331 config GENERIC_LOCKBREAK
334 depends on SPARC64 && SMP && PREEMPT
337 prompt "SPARC64 Huge TLB Page Size"
338 depends on SPARC64 && HUGETLB_PAGE
339 default HUGETLB_PAGE_SIZE_4MB
341 config HUGETLB_PAGE_SIZE_4MB
344 config HUGETLB_PAGE_SIZE_512K
347 config HUGETLB_PAGE_SIZE_64K
348 depends on !SPARC64_PAGE_SIZE_64KB
355 depends on SPARC64 && SMP
360 depends on NEED_MULTIPLE_NODES
362 # Some NUMA nodes have memory ranges that span
363 # other nodes. Even though a pfn is valid and
364 # between a node's start and end pfns, it may not
365 # reside on that node. See memmap_init_zone()
367 config NODES_SPAN_OTHER_NODES
369 depends on NEED_MULTIPLE_NODES
371 config ARCH_POPULATES_NODE_MAP
372 def_bool y if SPARC64
374 config ARCH_SELECT_MEMORY_MODEL
375 def_bool y if SPARC64
377 config ARCH_SPARSEMEM_ENABLE
378 def_bool y if SPARC64
379 select SPARSEMEM_VMEMMAP_ENABLE
381 config ARCH_SPARSEMEM_DEFAULT
382 def_bool y if SPARC64
387 bool "SMT (Hyperthreading) scheduler support"
388 depends on SPARC64 && SMP
391 SMT scheduler support improves the CPU scheduler's decision making
392 when dealing with SPARC cpus at a cost of slightly increased overhead
393 in some places. If unsure say N here.
396 bool "Multi-core scheduler support"
397 depends on SPARC64 && SMP
400 Multi-core scheduler support improves the CPU scheduler's decision
401 making when dealing with multi-core CPU chips at a cost of slightly
402 increased overhead in some places. If unsure say N here.
405 source "kernel/Kconfig.preempt"
409 bool "Default bootloader kernel arguments"
413 string "Initial kernel command string"
414 depends on CMDLINE_BOOL
415 default "console=ttyS0,9600 root=/dev/sda1"
417 Say Y here if you want to be able to pass default arguments to
418 the kernel. This will be overridden by the bootloader, if you
419 use one (such as SILO). This is most useful if you want to boot
420 a kernel from TFTP, and want default options to be available
421 with having them passed on the command line.
423 NOTE: This option WILL override the PROM bootargs setting!
429 Enable power management and CPU standby features on supported
433 tristate "Sun4m LED driver"
436 This driver toggles the front-panel LED on sun4m systems
437 in a user-specifiable manner. Its state can be probed
438 by reading /proc/led and its blinking mode can be changed
439 via writes to /proc/led
441 config SERIAL_CONSOLE
446 If you say Y here, it will be possible to use a serial port as the
447 system console (the system console is the device which receives all
448 kernel messages and warnings and which allows logins in single user
449 mode). This could be useful if some terminal or printer is connected
452 Even if you say Y here, the currently visible virtual console
453 (/dev/tty0) will still be used as the system console by default, but
454 you can alter that using a kernel command line option such as
455 "console=ttyS1". (Try "man bootparam" or see the documentation of
456 your boot loader (silo) about how to pass options to the kernel at
459 If you don't have a graphics card installed and you say Y here, the
460 kernel will automatically use the first serial line, /dev/ttyS0, as
466 bool "Sparc Leon processor family"
469 If you say Y here if you are running on a SPARC-LEON processor.
470 The LEON processor is a synthesizable VHDL model of the
471 SPARC-v8 standard. LEON is part of the GRLIB collection of
472 IP cores that are distributed under GPL. GRLIB can be downloaded
473 from www.gaisler.com. You can download a sparc-linux cross-compilation
474 toolchain at www.gaisler.com.
478 menu "Bus options (PCI etc.)"
488 bool "Sun Logical Domains support"
491 Say Y here is you want to support virtual devices via
495 bool "Support for PCI and PS/2 keyboard/mouse"
497 Find out whether your system includes a PCI bus. PCI is the name of
498 a bus system, i.e. the way the CPU talks to the other stuff inside
499 your box. If you say Y here, the kernel will include drivers and
500 infrastructure code to support PCI bus devices.
502 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
503 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
504 All of these platforms are extremely obscure, so say N if unsure.
507 def_bool PCI if SPARC64
512 source "drivers/pci/Kconfig"
514 source "drivers/pcmcia/Kconfig"
516 config SUN_OPENPROMFS
517 tristate "Openprom tree appears in /proc/openprom"
519 If you say Y, the OpenPROM device tree will be available as a
520 virtual file system, which you can mount to /proc/openprom by "mount
521 -t openpromfs none /proc/openprom".
523 To compile the /proc/openprom support as a module, choose M here: the
524 module will be called openpromfs.
526 Only choose N if you know in advance that you will not need to modify
527 OpenPROM settings on the running system.
533 depends on SPARC32 && PCI
538 depends on SPARC64 && PCI
542 menu "Executable file formats"
544 source "fs/Kconfig.binfmt"
550 select COMPAT_BINFMT_ELF
552 config SYSVIPC_COMPAT
554 depends on COMPAT && SYSVIPC
561 source "drivers/Kconfig"
563 source "drivers/sbus/char/Kconfig"
567 source "arch/sparc/Kconfig.debug"
569 source "security/Kconfig"
571 source "crypto/Kconfig"