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 HAVE_SYSCALL_TRACEPOINTS
47 select USE_GENERIC_SMP_HELPERS if SMP
51 select RTC_DRV_STARFIRE
52 select HAVE_PERF_EVENTS
53 select PERF_USE_VMALLOC
57 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
58 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
60 # CONFIG_BITS can be used at source level to get 32/64 bits
70 config GENERIC_CMOS_UPDATE
74 config GENERIC_CLOCKEVENTS
86 config STACKTRACE_SUPPORT
90 config LOCKDEP_SUPPORT
94 config HAVE_LATENCYTOP_SUPPORT
102 config HAVE_SETUP_PER_CPU_AREA
103 def_bool y if SPARC64
105 config NEED_PER_CPU_EMBED_FIRST_CHUNK
106 def_bool y if SPARC64
108 config NEED_PER_CPU_PAGE_FIRST_CHUNK
109 def_bool y if SPARC64
111 config GENERIC_HARDIRQS_NO__DO_IRQ
113 def_bool y if SPARC64
127 config GENERIC_ISA_DMA
134 Generic GPIO API support
136 config ARCH_NO_VIRT_TO_BUS
142 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
143 def_bool y if SPARC64
145 source "init/Kconfig"
147 source "kernel/Kconfig.freezer"
149 menu "Processor type and features"
152 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
154 This enables support for systems with more than one CPU. If you have
155 a system with only one CPU, say N. If you have a system with more
158 If you say N here, the kernel will run on single and multiprocessor
159 machines, but will use only one CPU of a multiprocessor machine. If
160 you say Y here, the kernel will run on many, but not all,
161 singleprocessor machines. On a singleprocessor machine, the kernel
162 will run faster if you say N here.
164 People using multiprocessor machines who say Y here should also say
165 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
166 Management" code will be disabled if you say Y here.
168 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
169 available at <http://www.tldp.org/docs.html#howto>.
171 If you don't know what to do here, say N.
174 int "Maximum number of CPUs"
176 range 2 32 if SPARC32
177 range 2 1024 if SPARC64
178 default 32 if SPARC32
179 default 64 if SPARC64
181 source kernel/Kconfig.hz
183 config RWSEM_GENERIC_SPINLOCK
187 config RWSEM_XCHGADD_ALGORITHM
191 config GENERIC_FIND_NEXT_BIT
195 config GENERIC_HWEIGHT
197 default y if !ULTRA_HAS_POPULATION_COUNT
199 config GENERIC_CALIBRATE_DELAY
203 config ARCH_MAY_HAVE_PC_FDC
207 config EMULATED_CMPXCHG
211 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
212 is emulated, and therefore it is not completely atomic.
218 depends on SPARC32 && SMP
223 depends on SPARC64 && SMP
226 bool "Support for early boot text console"
230 Say Y here to enable a faster early framebuffer boot console.
233 prompt "Kernel page size" if SPARC64
234 default SPARC64_PAGE_SIZE_8KB
236 config SPARC64_PAGE_SIZE_8KB
239 This lets you select the page size of the kernel.
241 8KB and 64KB work quite well, since SPARC ELF sections
242 provide for up to 64KB alignment.
244 If you don't know what to do, choose 8KB.
246 config SPARC64_PAGE_SIZE_64KB
252 bool "Enable seccomp to safely compute untrusted bytecode"
253 depends on SPARC64 && PROC_FS
256 This kernel feature is useful for number crunching applications
257 that may need to compute untrusted bytecode during their
258 execution. By using pipes or other transports made available to
259 the process as file descriptors supporting the read/write
260 syscalls, it's possible to isolate those applications in
261 their own address space using seccomp. Once seccomp is
262 enabled via /proc/<pid>/seccomp, it cannot be disabled
263 and the task is only allowed to execute a few safe syscalls
264 defined by each seccomp mode.
266 If unsure, say Y. Only embedded should say N here.
269 bool "Support for hot-pluggable CPUs"
270 depends on SPARC64 && SMP
273 Say Y here to experiment with turning CPUs off and on. CPUs
274 can be controlled through /sys/devices/system/cpu/cpu#.
275 Say N if you want to disable CPU hotplug.
277 config GENERIC_HARDIRQS
281 source "kernel/time/Kconfig"
284 source "drivers/cpufreq/Kconfig"
287 tristate "UltraSPARC-III CPU Frequency driver"
289 select CPU_FREQ_TABLE
291 This adds the CPUFreq driver for UltraSPARC-III processors.
293 For details, take a look at <file:Documentation/cpu-freq>.
298 tristate "UltraSPARC-IIe CPU Frequency driver"
300 select CPU_FREQ_TABLE
302 This adds the CPUFreq driver for UltraSPARC-IIe processors.
304 For details, take a look at <file:Documentation/cpu-freq>.
311 tristate "UltraSPARC-III Memory Controller driver"
315 This adds a driver for the UltraSPARC-III memory controller.
316 Loading this driver allows exact mnemonic strings to be
317 printed in the event of a memory error, so that the faulty DIMM
318 on the motherboard can be matched to the error.
320 If in doubt, say Y, as this information can be very useful.
322 # Global things across all Sun machines.
323 config GENERIC_LOCKBREAK
326 depends on SPARC64 && SMP && PREEMPT
329 prompt "SPARC64 Huge TLB Page Size"
330 depends on SPARC64 && HUGETLB_PAGE
331 default HUGETLB_PAGE_SIZE_4MB
333 config HUGETLB_PAGE_SIZE_4MB
336 config HUGETLB_PAGE_SIZE_512K
339 config HUGETLB_PAGE_SIZE_64K
340 depends on !SPARC64_PAGE_SIZE_64KB
347 depends on SPARC64 && SMP
352 depends on NEED_MULTIPLE_NODES
354 # Some NUMA nodes have memory ranges that span
355 # other nodes. Even though a pfn is valid and
356 # between a node's start and end pfns, it may not
357 # reside on that node. See memmap_init_zone()
359 config NODES_SPAN_OTHER_NODES
361 depends on NEED_MULTIPLE_NODES
363 config ARCH_POPULATES_NODE_MAP
364 def_bool y if SPARC64
366 config ARCH_SELECT_MEMORY_MODEL
367 def_bool y if SPARC64
369 config ARCH_SPARSEMEM_ENABLE
370 def_bool y if SPARC64
371 select SPARSEMEM_VMEMMAP_ENABLE
373 config ARCH_SPARSEMEM_DEFAULT
374 def_bool y if SPARC64
379 bool "SMT (Hyperthreading) scheduler support"
380 depends on SPARC64 && SMP
383 SMT scheduler support improves the CPU scheduler's decision making
384 when dealing with SPARC cpus at a cost of slightly increased overhead
385 in some places. If unsure say N here.
388 bool "Multi-core scheduler support"
389 depends on SPARC64 && SMP
392 Multi-core scheduler support improves the CPU scheduler's decision
393 making when dealing with multi-core CPU chips at a cost of slightly
394 increased overhead in some places. If unsure say N here.
397 source "kernel/Kconfig.preempt"
401 bool "Default bootloader kernel arguments"
405 string "Initial kernel command string"
406 depends on CMDLINE_BOOL
407 default "console=ttyS0,9600 root=/dev/sda1"
409 Say Y here if you want to be able to pass default arguments to
410 the kernel. This will be overridden by the bootloader, if you
411 use one (such as SILO). This is most useful if you want to boot
412 a kernel from TFTP, and want default options to be available
413 with having them passed on the command line.
415 NOTE: This option WILL override the PROM bootargs setting!
421 Enable power management and CPU standby features on supported
425 tristate "Sun4m LED driver"
428 This driver toggles the front-panel LED on sun4m systems
429 in a user-specifiable manner. Its state can be probed
430 by reading /proc/led and its blinking mode can be changed
431 via writes to /proc/led
433 config SERIAL_CONSOLE
438 If you say Y here, it will be possible to use a serial port as the
439 system console (the system console is the device which receives all
440 kernel messages and warnings and which allows logins in single user
441 mode). This could be useful if some terminal or printer is connected
444 Even if you say Y here, the currently visible virtual console
445 (/dev/tty0) will still be used as the system console by default, but
446 you can alter that using a kernel command line option such as
447 "console=ttyS1". (Try "man bootparam" or see the documentation of
448 your boot loader (silo) about how to pass options to the kernel at
451 If you don't have a graphics card installed and you say Y here, the
452 kernel will automatically use the first serial line, /dev/ttyS0, as
458 bool "Sparc Leon processor family"
461 If you say Y here if you are running on a SPARC-LEON processor.
462 The LEON processor is a synthesizable VHDL model of the
463 SPARC-v8 standard. LEON is part of the GRLIB collection of
464 IP cores that are distributed under GPL. GRLIB can be downloaded
465 from www.gaisler.com. You can download a sparc-linux cross-compilation
466 toolchain at www.gaisler.com.
470 menu "Bus options (PCI etc.)"
480 bool "Sun Logical Domains support"
483 Say Y here is you want to support virtual devices via
487 bool "Support for PCI and PS/2 keyboard/mouse"
489 Find out whether your system includes a PCI bus. PCI is the name of
490 a bus system, i.e. the way the CPU talks to the other stuff inside
491 your box. If you say Y here, the kernel will include drivers and
492 infrastructure code to support PCI bus devices.
494 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
495 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
496 All of these platforms are extremely obscure, so say N if unsure.
499 def_bool PCI if SPARC64
504 source "drivers/pci/Kconfig"
506 source "drivers/pcmcia/Kconfig"
508 config SUN_OPENPROMFS
509 tristate "Openprom tree appears in /proc/openprom"
511 If you say Y, the OpenPROM device tree will be available as a
512 virtual file system, which you can mount to /proc/openprom by "mount
513 -t openpromfs none /proc/openprom".
515 To compile the /proc/openprom support as a module, choose M here: the
516 module will be called openpromfs.
518 Only choose N if you know in advance that you will not need to modify
519 OpenPROM settings on the running system.
525 depends on SPARC32 && PCI
530 depends on SPARC64 && PCI
534 menu "Executable file formats"
536 source "fs/Kconfig.binfmt"
542 select COMPAT_BINFMT_ELF
544 config SYSVIPC_COMPAT
546 depends on COMPAT && SYSVIPC
553 source "drivers/Kconfig"
555 source "drivers/sbus/char/Kconfig"
559 source "arch/sparc/Kconfig.debug"
561 source "security/Kconfig"
563 source "crypto/Kconfig"