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
73 config ARCH_USES_GETTIMEOFFSET
77 config GENERIC_CMOS_UPDATE
81 config GENERIC_CLOCKEVENTS
93 config STACKTRACE_SUPPORT
97 config LOCKDEP_SUPPORT
101 config HAVE_LATENCYTOP_SUPPORT
109 config HAVE_SETUP_PER_CPU_AREA
110 def_bool y if SPARC64
112 config NEED_PER_CPU_EMBED_FIRST_CHUNK
113 def_bool y if SPARC64
115 config NEED_PER_CPU_PAGE_FIRST_CHUNK
116 def_bool y if SPARC64
118 config GENERIC_HARDIRQS_NO__DO_IRQ
120 def_bool y if SPARC64
134 config NEED_DMA_MAP_STATE
137 config NEED_SG_DMA_LENGTH
140 config GENERIC_ISA_DMA
147 Generic GPIO API support
149 config ARCH_NO_VIRT_TO_BUS
152 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
153 def_bool y if SPARC64
155 source "init/Kconfig"
157 source "kernel/Kconfig.freezer"
159 menu "Processor type and features"
162 bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
164 This enables support for systems with more than one CPU. If you have
165 a system with only one CPU, say N. If you have a system with more
168 If you say N here, the kernel will run on single and multiprocessor
169 machines, but will use only one CPU of a multiprocessor machine. If
170 you say Y here, the kernel will run on many, but not all,
171 singleprocessor machines. On a singleprocessor machine, the kernel
172 will run faster if you say N here.
174 People using multiprocessor machines who say Y here should also say
175 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
176 Management" code will be disabled if you say Y here.
178 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
179 available at <http://www.tldp.org/docs.html#howto>.
181 If you don't know what to do here, say N.
184 int "Maximum number of CPUs"
186 range 2 32 if SPARC32
187 range 2 1024 if SPARC64
188 default 32 if SPARC32
189 default 64 if SPARC64
191 source kernel/Kconfig.hz
193 config RWSEM_GENERIC_SPINLOCK
197 config RWSEM_XCHGADD_ALGORITHM
201 config GENERIC_FIND_NEXT_BIT
205 config GENERIC_HWEIGHT
207 default y if !ULTRA_HAS_POPULATION_COUNT
209 config GENERIC_CALIBRATE_DELAY
213 config ARCH_MAY_HAVE_PC_FDC
217 config EMULATED_CMPXCHG
221 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
222 is emulated, and therefore it is not completely atomic.
228 depends on SPARC32 && SMP
233 depends on SPARC64 && SMP
236 bool "Support for early boot text console"
240 Say Y here to enable a faster early framebuffer boot console.
243 prompt "Kernel page size" if SPARC64
244 default SPARC64_PAGE_SIZE_8KB
246 config SPARC64_PAGE_SIZE_8KB
249 This lets you select the page size of the kernel.
251 8KB and 64KB work quite well, since SPARC ELF sections
252 provide for up to 64KB alignment.
254 If you don't know what to do, choose 8KB.
256 config SPARC64_PAGE_SIZE_64KB
262 bool "Enable seccomp to safely compute untrusted bytecode"
263 depends on SPARC64 && PROC_FS
266 This kernel feature is useful for number crunching applications
267 that may need to compute untrusted bytecode during their
268 execution. By using pipes or other transports made available to
269 the process as file descriptors supporting the read/write
270 syscalls, it's possible to isolate those applications in
271 their own address space using seccomp. Once seccomp is
272 enabled via /proc/<pid>/seccomp, it cannot be disabled
273 and the task is only allowed to execute a few safe syscalls
274 defined by each seccomp mode.
276 If unsure, say Y. Only embedded should say N here.
279 bool "Support for hot-pluggable CPUs"
280 depends on SPARC64 && SMP
283 Say Y here to experiment with turning CPUs off and on. CPUs
284 can be controlled through /sys/devices/system/cpu/cpu#.
285 Say N if you want to disable CPU hotplug.
287 config GENERIC_HARDIRQS
291 source "kernel/time/Kconfig"
294 source "drivers/cpufreq/Kconfig"
297 tristate "UltraSPARC-III CPU Frequency driver"
299 select CPU_FREQ_TABLE
301 This adds the CPUFreq driver for UltraSPARC-III processors.
303 For details, take a look at <file:Documentation/cpu-freq>.
308 tristate "UltraSPARC-IIe CPU Frequency driver"
310 select CPU_FREQ_TABLE
312 This adds the CPUFreq driver for UltraSPARC-IIe processors.
314 For details, take a look at <file:Documentation/cpu-freq>.
321 tristate "UltraSPARC-III Memory Controller driver"
325 This adds a driver for the UltraSPARC-III memory controller.
326 Loading this driver allows exact mnemonic strings to be
327 printed in the event of a memory error, so that the faulty DIMM
328 on the motherboard can be matched to the error.
330 If in doubt, say Y, as this information can be very useful.
332 # Global things across all Sun machines.
333 config GENERIC_LOCKBREAK
336 depends on SPARC64 && SMP && PREEMPT
339 prompt "SPARC64 Huge TLB Page Size"
340 depends on SPARC64 && HUGETLB_PAGE
341 default HUGETLB_PAGE_SIZE_4MB
343 config HUGETLB_PAGE_SIZE_4MB
346 config HUGETLB_PAGE_SIZE_512K
349 config HUGETLB_PAGE_SIZE_64K
350 depends on !SPARC64_PAGE_SIZE_64KB
357 depends on SPARC64 && SMP
362 depends on NEED_MULTIPLE_NODES
364 # Some NUMA nodes have memory ranges that span
365 # other nodes. Even though a pfn is valid and
366 # between a node's start and end pfns, it may not
367 # reside on that node. See memmap_init_zone()
369 config NODES_SPAN_OTHER_NODES
371 depends on NEED_MULTIPLE_NODES
373 config ARCH_POPULATES_NODE_MAP
374 def_bool y if SPARC64
376 config ARCH_SELECT_MEMORY_MODEL
377 def_bool y if SPARC64
379 config ARCH_SPARSEMEM_ENABLE
380 def_bool y if SPARC64
381 select SPARSEMEM_VMEMMAP_ENABLE
383 config ARCH_SPARSEMEM_DEFAULT
384 def_bool y if SPARC64
389 bool "SMT (Hyperthreading) scheduler support"
390 depends on SPARC64 && SMP
393 SMT scheduler support improves the CPU scheduler's decision making
394 when dealing with SPARC cpus at a cost of slightly increased overhead
395 in some places. If unsure say N here.
398 bool "Multi-core scheduler support"
399 depends on SPARC64 && SMP
402 Multi-core scheduler support improves the CPU scheduler's decision
403 making when dealing with multi-core CPU chips at a cost of slightly
404 increased overhead in some places. If unsure say N here.
407 source "kernel/Kconfig.preempt"
411 bool "Default bootloader kernel arguments"
415 string "Initial kernel command string"
416 depends on CMDLINE_BOOL
417 default "console=ttyS0,9600 root=/dev/sda1"
419 Say Y here if you want to be able to pass default arguments to
420 the kernel. This will be overridden by the bootloader, if you
421 use one (such as SILO). This is most useful if you want to boot
422 a kernel from TFTP, and want default options to be available
423 with having them passed on the command line.
425 NOTE: This option WILL override the PROM bootargs setting!
431 Enable power management and CPU standby features on supported
435 tristate "Sun4m LED driver"
438 This driver toggles the front-panel LED on sun4m systems
439 in a user-specifiable manner. Its state can be probed
440 by reading /proc/led and its blinking mode can be changed
441 via writes to /proc/led
443 config SERIAL_CONSOLE
448 If you say Y here, it will be possible to use a serial port as the
449 system console (the system console is the device which receives all
450 kernel messages and warnings and which allows logins in single user
451 mode). This could be useful if some terminal or printer is connected
454 Even if you say Y here, the currently visible virtual console
455 (/dev/tty0) will still be used as the system console by default, but
456 you can alter that using a kernel command line option such as
457 "console=ttyS1". (Try "man bootparam" or see the documentation of
458 your boot loader (silo) about how to pass options to the kernel at
461 If you don't have a graphics card installed and you say Y here, the
462 kernel will automatically use the first serial line, /dev/ttyS0, as
468 bool "Sparc Leon processor family"
471 If you say Y here if you are running on a SPARC-LEON processor.
472 The LEON processor is a synthesizable VHDL model of the
473 SPARC-v8 standard. LEON is part of the GRLIB collection of
474 IP cores that are distributed under GPL. GRLIB can be downloaded
475 from www.gaisler.com. You can download a sparc-linux cross-compilation
476 toolchain at www.gaisler.com.
480 menu "Bus options (PCI etc.)"
490 bool "Sun Logical Domains support"
493 Say Y here is you want to support virtual devices via
497 bool "Support for PCI and PS/2 keyboard/mouse"
499 Find out whether your system includes a PCI bus. PCI is the name of
500 a bus system, i.e. the way the CPU talks to the other stuff inside
501 your box. If you say Y here, the kernel will include drivers and
502 infrastructure code to support PCI bus devices.
504 CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
505 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
506 All of these platforms are extremely obscure, so say N if unsure.
509 def_bool PCI if SPARC64
514 source "drivers/pci/Kconfig"
516 source "drivers/pcmcia/Kconfig"
518 config SUN_OPENPROMFS
519 tristate "Openprom tree appears in /proc/openprom"
521 If you say Y, the OpenPROM device tree will be available as a
522 virtual file system, which you can mount to /proc/openprom by "mount
523 -t openpromfs none /proc/openprom".
525 To compile the /proc/openprom support as a module, choose M here: the
526 module will be called openpromfs.
528 Only choose N if you know in advance that you will not need to modify
529 OpenPROM settings on the running system.
535 depends on SPARC32 && PCI
540 depends on SPARC64 && PCI
544 menu "Executable file formats"
546 source "fs/Kconfig.binfmt"
552 select COMPAT_BINFMT_ELF
554 config SYSVIPC_COMPAT
556 depends on COMPAT && SYSVIPC
563 source "drivers/Kconfig"
565 source "drivers/sbus/char/Kconfig"
569 source "arch/sparc/Kconfig.debug"
571 source "security/Kconfig"
573 source "crypto/Kconfig"