# $Id: config.in,v 1.113 2002/01/24 22:14:44 davem Exp $ # For a description of the syntax of this configuration file, # see Documentation/kbuild/kconfig-language.txt. # mainmenu "Linux/SPARC Kernel Configuration" config MMU bool default y config HIGHMEM bool default y config ZONE_DMA bool default y config GENERIC_ISA_DMA bool default y config ARCH_NO_VIRT_TO_BUS def_bool y config OF def_bool y source "init/Kconfig" menu "General machine setup" config SMP bool "Symmetric multi-processing support (does not work on sun4/sun4c)" ---help--- This enables support for systems with more than one CPU. If you have a system with only one CPU, say N. If you have a system with more than one CPU, say Y. If you say N here, the kernel will run on single and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on many, but not all, singleprocessor machines. On a singleprocessor machine, the kernel will run faster if you say N here. People using multiprocessor machines who say Y here should also say Y to "Enhanced Real Time Clock Support", below. The "Advanced Power Management" code will be disabled if you say Y here. See also the <file:Documentation/smp.txt>, <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>. If you don't know what to do here, say N. config NR_CPUS int "Maximum number of CPUs (2-32)" range 2 32 depends on SMP default "32" config SPARC bool default y # Identify this as a Sparc32 build config SPARC32 bool default y help SPARC is a family of RISC microprocessors designed and marketed by Sun Microsystems, incorporated. They are very widely found in Sun workstations and clones. This port covers the original 32-bit SPARC; it is old and stable and usually considered one of the "big three" along with the Intel and Alpha ports. The UltraLinux project maintains both the SPARC32 and SPARC64 ports; its web page is available at <http://www.ultralinux.org/>. # Global things across all Sun machines. config ISA bool help ISA is found on Espresso only and is not supported currently. Say N config EISA bool help EISA is not supported. Say N config MCA bool help MCA is not supported. Say N config PCMCIA tristate ---help--- Say Y here if you want to attach PCMCIA- or PC-cards to your Linux computer. These are credit-card size devices such as network cards, modems or hard drives often used with laptops computers. There are actually two varieties of these cards: the older 16 bit PCMCIA cards and the newer 32 bit CardBus cards. If you want to use CardBus cards, you need to say Y here and also to "CardBus support" below. To use your PC-cards, you will need supporting software from David Hinds' pcmcia-cs package (see the file <file:Documentation/Changes> for location). Please also read the PCMCIA-HOWTO, available from <http://www.tldp.org/docs.html#howto>. To compile this driver as modules, choose M here: the modules will be called pcmcia_core and ds. config SBUS bool default y config SBUSCHAR bool default y config SERIAL_CONSOLE bool default y ---help--- If you say Y here, it will be possible to use a serial port as the system console (the system console is the device which receives all kernel messages and warnings and which allows logins in single user mode). This could be useful if some terminal or printer is connected to that serial port. Even if you say Y here, the currently visible virtual console (/dev/tty0) will still be used as the system console by default, but you can alter that using a kernel command line option such as "console=ttyS1". (Try "man bootparam" or see the documentation of your boot loader (silo) about how to pass options to the kernel at boot time.) If you don't have a graphics card installed and you say Y here, the kernel will automatically use the first serial line, /dev/ttyS0, as system console. If unsure, say N. config SUN_AUXIO bool default y config SUN_IO bool default y config RWSEM_GENERIC_SPINLOCK bool default y config RWSEM_XCHGADD_ALGORITHM bool config GENERIC_FIND_NEXT_BIT bool default y config GENERIC_HWEIGHT bool default y config GENERIC_CALIBRATE_DELAY bool default y config ARCH_MAY_HAVE_PC_FDC bool default y config ARCH_HAS_ILOG2_U32 bool default n config ARCH_HAS_ILOG2_U64 bool default n config EMULATED_CMPXCHG bool default y help Sparc32 does not have a CAS instruction like sparc64. cmpxchg() is emulated, and therefore it is not completely atomic. config SUN_PM bool default y help Enable power management and CPU standby features on supported SPARC platforms. config SUN4 bool "Support for SUN4 machines (disables SUN4[CDM] support)" depends on !SMP default n help Say Y here if, and only if, your machine is a sun4. Note that a kernel compiled with this option will run only on sun4. (And the current version will probably work only on sun4/330.) if !SUN4 config PCI bool "Support for PCI and PS/2 keyboard/mouse" help CONFIG_PCI is needed for all JavaStation's (including MrCoffee), CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC. All of these platforms are extremely obscure, so say N if unsure. config PCI_SYSCALL def_bool PCI source "drivers/pci/Kconfig" endif config NO_DMA def_bool !PCI config SUN_OPENPROMFS tristate "Openprom tree appears in /proc/openprom" help If you say Y, the OpenPROM device tree will be available as a virtual file system, which you can mount to /proc/openprom by "mount -t openpromfs none /proc/openprom". To compile the /proc/openprom support as a module, choose M here: the module will be called openpromfs. Only choose N if you know in advance that you will not need to modify OpenPROM settings on the running system. config SPARC_LED tristate "Sun4m LED driver" help This driver toggles the front-panel LED on sun4m systems in a user-specifiable manner. Its state can be probed by reading /proc/led and its blinking mode can be changed via writes to /proc/led source "fs/Kconfig.binfmt" config SUNOS_EMUL bool "SunOS binary emulation" help This allows you to run most SunOS binaries. If you want to do this, say Y here and place appropriate files in /usr/gnemul/sunos. See <http://www.ultralinux.org/faq.html> for more information. If you want to run SunOS binaries on an Ultra you must also say Y to "Kernel support for 32-bit a.out binaries" above. source "mm/Kconfig" endmenu source "net/Kconfig" source "drivers/Kconfig" if !SUN4 source "drivers/sbus/char/Kconfig" endif # This one must be before the filesystem configs. -DaveM menu "Unix98 PTY support" config UNIX98_PTYS bool "Unix98 PTY support" ---help--- A pseudo terminal (PTY) is a software device consisting of two halves: a master and a slave. The slave device behaves identical to a physical terminal; the master device is used by a process to read data from and write data to the slave, thereby emulating a terminal. Typical programs for the master side are telnet servers and xterms. Linux has traditionally used the BSD-like names /dev/ptyxx for masters and /dev/ttyxx for slaves of pseudo terminals. This scheme has a number of problems. The GNU C library glibc 2.1 and later, however, supports the Unix98 naming standard: in order to acquire a pseudo terminal, a process opens /dev/ptmx; the number of the pseudo terminal is then made available to the process and the pseudo terminal slave can be accessed as /dev/pts/<number>. What was traditionally /dev/ttyp2 will then be /dev/pts/2, for example. The entries in /dev/pts/ are created on the fly by a virtual file system; therefore, if you say Y here you should say Y to "/dev/pts file system for Unix98 PTYs" as well. If you want to say Y here, you need to have the C library glibc 2.1 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*"). Read the instructions in <file:Documentation/Changes> pertaining to pseudo terminals. It's safe to say N. config UNIX98_PTY_COUNT int "Maximum number of Unix98 PTYs in use (0-2048)" depends on UNIX98_PTYS default "256" help The maximum number of Unix98 PTYs that can be used at any one time. The default is 256, and should be enough for desktop systems. Server machines which support incoming telnet/rlogin/ssh connections and/or serve several X terminals may want to increase this: every incoming connection and every xterm uses up one PTY. When not in use, each additional set of 256 PTYs occupy approximately 8 KB of kernel memory on 32-bit architectures. endmenu source "fs/Kconfig" source "kernel/Kconfig.instrumentation" source "arch/sparc/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig" source "lib/Kconfig"