1 # $Id: config.in,v 1.158 2002/01/24 22:14:44 davem Exp $
2 # For a description of the syntax of this configuration file,
3 # see the Configure script.
6 mainmenu "Linux/UltraSPARC Kernel Configuration"
16 SPARC is a family of RISC microprocessors designed and marketed by
17 Sun Microsystems, incorporated. This port covers the newer 64-bit
18 UltraSPARC. The UltraLinux project maintains both the SPARC32 and
19 SPARC64 ports; its web page is available at
20 <http://www.ultralinux.org/>.
29 config TIME_INTERPOLATION
33 config ARCH_MAY_HAVE_PC_FDC
38 prompt "Kernel page size"
39 default SPARC64_PAGE_SIZE_8KB
41 config SPARC64_PAGE_SIZE_8KB
44 This lets you select the page size of the kernel.
46 8KB and 64KB work quite well, since Sparc ELF sections
47 provide for up to 64KB alignment.
49 Therefore, 512KB and 4MB are for expert hackers only.
51 If you don't know what to do, choose 8KB.
53 config SPARC64_PAGE_SIZE_64KB
56 config SPARC64_PAGE_SIZE_512KB
59 config SPARC64_PAGE_SIZE_4MB
65 bool "Enable seccomp to safely compute untrusted bytecode"
69 This kernel feature is useful for number crunching applications
70 that may need to compute untrusted bytecode during their
71 execution. By using pipes or other transports made available to
72 the process as file descriptors supporting the read/write
73 syscalls, it's possible to isolate those applications in
74 their own address space using seccomp. Once seccomp is
75 enabled via /proc/<pid>/seccomp, it cannot be disabled
76 and the task is only allowed to execute a few safe syscalls
77 defined by each seccomp mode.
79 If unsure, say Y. Only embedded should say N here.
81 source kernel/Kconfig.hz
87 depends on COMPAT && SYSVIPC
90 menu "General machine setup"
93 bool "Symmetric multi-processing support"
95 This enables support for systems with more than one CPU. If you have
96 a system with only one CPU, say N. If you have a system with more than
99 If you say N here, the kernel will run on single and multiprocessor
100 machines, but will use only one CPU of a multiprocessor machine. If
101 you say Y here, the kernel will run on many, but not all,
102 singleprocessor machines. On a singleprocessor machine, the kernel
103 will run faster if you say N here.
105 People using multiprocessor machines who say Y here should also say
106 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
107 Management" code will be disabled if you say Y here.
109 See also the <file:Documentation/smp.txt>,
110 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
111 <http://www.tldp.org/docs.html#howto>.
113 If you don't know what to do here, say N.
116 bool "Preemptible Kernel"
118 This option reduces the latency of the kernel when reacting to
119 real-time or interactive events by allowing a low priority process to
120 be preempted even if it is in kernel mode executing a system call.
121 This allows applications to run more reliably even when the system is
124 Say Y here if you are building a kernel for a desktop, embedded
125 or real-time system. Say N if you are unsure.
128 int "Maximum number of CPUs (2-64)"
133 source "drivers/cpufreq/Kconfig"
136 tristate "UltraSPARC-III CPU Frequency driver"
138 select CPU_FREQ_TABLE
140 This adds the CPUFreq driver for UltraSPARC-III processors.
142 For details, take a look at <file:Documentation/cpu-freq>.
147 tristate "UltraSPARC-IIe CPU Frequency driver"
149 select CPU_FREQ_TABLE
151 This adds the CPUFreq driver for UltraSPARC-IIe processors.
153 For details, take a look at <file:Documentation/cpu-freq>.
157 # Global things across all Sun machines.
158 config RWSEM_GENERIC_SPINLOCK
161 config RWSEM_XCHGADD_ALGORITHM
165 config GENERIC_CALIBRATE_DELAY
170 prompt "SPARC64 Huge TLB Page Size"
171 depends on HUGETLB_PAGE
172 default HUGETLB_PAGE_SIZE_4MB
174 config HUGETLB_PAGE_SIZE_4MB
177 config HUGETLB_PAGE_SIZE_512K
178 depends on !SPARC64_PAGE_SIZE_4MB
181 config HUGETLB_PAGE_SIZE_64K
182 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
189 config ARCH_SPARSEMEM_ENABLE
192 config ARCH_SPARSEMEM_DEFAULT
197 config GENERIC_ISA_DMA
204 Find out whether you have ISA slots on your motherboard. ISA is the
205 name of a bus system, i.e. the way the CPU talks to the other stuff
206 inside your box. Other bus systems are PCI, EISA, MicroChannel
207 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
208 newer boards don't support it. If you have ISA, say Y, otherwise N.
213 Say Y here if you would like support for ISA Plug and Play devices.
214 Some information is in <file:Documentation/isapnp.txt>.
216 To compile this driver as a module, choose M here: the
217 module will be called isapnp.
224 The Extended Industry Standard Architecture (EISA) bus was
225 developed as an open alternative to the IBM MicroChannel bus.
227 The EISA bus provided some of the features of the IBM MicroChannel
228 bus while maintaining backward compatibility with cards made for
229 the older ISA bus. The EISA bus saw limited use between 1988 and
230 1995 when it was made obsolete by the PCI bus.
232 Say Y here if you are building a kernel for an EISA-based machine.
239 MicroChannel Architecture is found in some IBM PS/2 machines and
240 laptops. It is a bus system similar to PCI or ISA. See
241 <file:Documentation/mca.txt> (and especially the web page given
242 there) before attempting to build an MCA bus kernel.
247 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
248 computer. These are credit-card size devices such as network cards,
249 modems or hard drives often used with laptops computers. There are
250 actually two varieties of these cards: the older 16 bit PCMCIA cards
251 and the newer 32 bit CardBus cards. If you want to use CardBus
252 cards, you need to say Y here and also to "CardBus support" below.
254 To use your PC-cards, you will need supporting software from David
255 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
256 for location). Please also read the PCMCIA-HOWTO, available from
257 <http://www.tldp.org/docs.html#howto>.
259 To compile this driver as modules, choose M here: the
260 modules will be called pcmcia_core and ds.
281 Find out whether you have a PCI motherboard. PCI is the name of a
282 bus system, i.e. the way the CPU talks to the other stuff inside
283 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
284 VESA. If you have PCI, say Y, otherwise N.
286 The PCI-HOWTO, available from
287 <http://www.tldp.org/docs.html#howto>, contains valuable
288 information about which PCI hardware does work under Linux and which
295 source "drivers/pci/Kconfig"
297 config SUN_OPENPROMFS
298 tristate "Openprom tree appears in /proc/openprom"
300 If you say Y, the OpenPROM device tree will be available as a
301 virtual file system, which you can mount to /proc/openprom by "mount
302 -t openpromfs none /proc/openprom".
304 To compile the /proc/openprom support as a module, choose M here: the
305 module will be called openpromfs. If unsure, choose M.
307 config SPARC32_COMPAT
308 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
310 This allows you to run 32-bit binaries on your Ultra.
311 Everybody wants this; say Y.
315 depends on SPARC32_COMPAT
319 tristate "Kernel support for 32-bit ELF binaries"
320 depends on SPARC32_COMPAT
322 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
323 Everybody wants this; say Y.
326 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
327 depends on SPARC32_COMPAT
329 This allows you to run 32-bit a.out format binaries on your Ultra.
330 If you want to run SunOS binaries (see SunOS binary emulation below)
331 or other a.out binaries, say Y. If unsure, say N.
333 menu "Executable file formats"
335 source "fs/Kconfig.binfmt"
338 bool "SunOS binary emulation"
339 depends on BINFMT_AOUT32
341 This allows you to run most SunOS binaries. If you want to do this,
342 say Y here and place appropriate files in /usr/gnemul/sunos. See
343 <http://www.ultralinux.org/faq.html> for more information. If you
344 want to run SunOS binaries on an Ultra you must also say Y to
345 "Kernel support for 32-bit a.out binaries" above.
348 tristate "Solaris binary emulation (EXPERIMENTAL)"
349 depends on SPARC32_COMPAT && EXPERIMENTAL
351 This is experimental code which will enable you to run (many)
352 Solaris binaries on your SPARC Linux machine.
354 To compile this code as a module, choose M here: the
355 module will be called solaris.
360 bool "Default bootloader kernel arguments"
363 string "Initial kernel command string"
364 depends on CMDLINE_BOOL
365 default "console=ttyS0,9600 root=/dev/sda1"
367 Say Y here if you want to be able to pass default arguments to
368 the kernel. This will be overridden by the bootloader, if you
369 use one (such as SILO). This is most useful if you want to boot
370 a kernel from TFTP, and want default options to be available
371 with having them passed on the command line.
373 NOTE: This option WILL override the PROM bootargs setting!
377 source "drivers/Kconfig"
379 source "drivers/sbus/char/Kconfig"
381 source "drivers/fc4/Kconfig"
385 menu "Instrumentation Support"
386 depends on EXPERIMENTAL
388 source "arch/sparc64/oprofile/Kconfig"
391 bool "Kprobes (EXPERIMENTAL)"
392 depends on EXPERIMENTAL && MODULES
394 Kprobes allows you to trap at almost any kernel address and
395 execute a callback function. register_kprobe() establishes
396 a probepoint and specifies the callback. Kprobes is useful
397 for kernel debugging, non-intrusive instrumentation and testing.
398 If in doubt, say "N".
401 source "arch/sparc64/Kconfig.debug"
403 source "security/Kconfig"
405 source "crypto/Kconfig"