1# $Id: config.in,v 1.113 2002/01/24 22:14:44 davem Exp $ 2# For a description of the syntax of this configuration file, 3# see Documentation/kbuild/kconfig-language.txt. 4# 5 6mainmenu "Linux/SPARC Kernel Configuration" 7 8config MMU 9 bool 10 default y 11 12config HIGHMEM 13 bool 14 default y 15 16config ZONE_DMA 17 bool 18 default y 19 20config GENERIC_ISA_DMA 21 bool 22 default y 23 24source "init/Kconfig" 25 26menu "General machine setup" 27 28config SMP 29 bool "Symmetric multi-processing support (does not work on sun4/sun4c)" 30 ---help--- 31 This enables support for systems with more than one CPU. If you have 32 a system with only one CPU, say N. If you have a system with more 33 than one CPU, say Y. 34 35 If you say N here, the kernel will run on single and multiprocessor 36 machines, but will use only one CPU of a multiprocessor machine. If 37 you say Y here, the kernel will run on many, but not all, 38 singleprocessor machines. On a singleprocessor machine, the kernel 39 will run faster if you say N here. 40 41 People using multiprocessor machines who say Y here should also say 42 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 43 Management" code will be disabled if you say Y here. 44 45 See also the <file:Documentation/smp.txt>, 46 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 47 <http://www.tldp.org/docs.html#howto>. 48 49 If you don't know what to do here, say N. 50 51config NR_CPUS 52 int "Maximum number of CPUs (2-32)" 53 range 2 32 54 depends on SMP 55 default "32" 56 57config SPARC 58 bool 59 default y 60 61# Identify this as a Sparc32 build 62config SPARC32 63 bool 64 default y 65 help 66 SPARC is a family of RISC microprocessors designed and marketed by 67 Sun Microsystems, incorporated. They are very widely found in Sun 68 workstations and clones. This port covers the original 32-bit SPARC; 69 it is old and stable and usually considered one of the "big three" 70 along with the Intel and Alpha ports. The UltraLinux project 71 maintains both the SPARC32 and SPARC64 ports; its web page is 72 available at <http://www.ultralinux.org/>. 73 74# Global things across all Sun machines. 75config ISA 76 bool 77 help 78 ISA is found on Espresso only and is not supported currently. 79 Say N 80 81config EISA 82 bool 83 help 84 EISA is not supported. 85 Say N 86 87config MCA 88 bool 89 help 90 MCA is not supported. 91 Say N 92 93config PCMCIA 94 tristate 95 ---help--- 96 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux 97 computer. These are credit-card size devices such as network cards, 98 modems or hard drives often used with laptops computers. There are 99 actually two varieties of these cards: the older 16 bit PCMCIA cards 100 and the newer 32 bit CardBus cards. If you want to use CardBus 101 cards, you need to say Y here and also to "CardBus support" below. 102 103 To use your PC-cards, you will need supporting software from David 104 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes> 105 for location). Please also read the PCMCIA-HOWTO, available from 106 <http://www.tldp.org/docs.html#howto>. 107 108 To compile this driver as modules, choose M here: the 109 modules will be called pcmcia_core and ds. 110 111config SBUS 112 bool 113 default y 114 115config SBUSCHAR 116 bool 117 default y 118 119config SERIAL_CONSOLE 120 bool 121 default y 122 ---help--- 123 If you say Y here, it will be possible to use a serial port as the 124 system console (the system console is the device which receives all 125 kernel messages and warnings and which allows logins in single user 126 mode). This could be useful if some terminal or printer is connected 127 to that serial port. 128 129 Even if you say Y here, the currently visible virtual console 130 (/dev/tty0) will still be used as the system console by default, but 131 you can alter that using a kernel command line option such as 132 "console=ttyS1". (Try "man bootparam" or see the documentation of 133 your boot loader (silo) about how to pass options to the kernel at 134 boot time.) 135 136 If you don't have a graphics card installed and you say Y here, the 137 kernel will automatically use the first serial line, /dev/ttyS0, as 138 system console. 139 140 If unsure, say N. 141 142config SUN_AUXIO 143 bool 144 default y 145 146config SUN_IO 147 bool 148 default y 149 150config RWSEM_GENERIC_SPINLOCK 151 bool 152 default y 153 154config RWSEM_XCHGADD_ALGORITHM 155 bool 156 157config GENERIC_FIND_NEXT_BIT 158 bool 159 default y 160 161config GENERIC_HWEIGHT 162 bool 163 default y 164 165config GENERIC_CALIBRATE_DELAY 166 bool 167 default y 168 169config ARCH_MAY_HAVE_PC_FDC 170 bool 171 default y 172 173config ARCH_HAS_ILOG2_U32 174 bool 175 default n 176 177config ARCH_HAS_ILOG2_U64 178 bool 179 default n 180 181config SUN_PM 182 bool 183 default y 184 help 185 Enable power management and CPU standby features on supported 186 SPARC platforms. 187 188config SUN4 189 bool "Support for SUN4 machines (disables SUN4[CDM] support)" 190 depends on !SMP 191 default n 192 help 193 Say Y here if, and only if, your machine is a sun4. Note that 194 a kernel compiled with this option will run only on sun4. 195 (And the current version will probably work only on sun4/330.) 196 197if !SUN4 198 199config PCI 200 bool "Support for PCI and PS/2 keyboard/mouse" 201 help 202 CONFIG_PCI is needed for all JavaStation's (including MrCoffee), 203 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC. 204 All of these platforms are extremely obscure, so say N if unsure. 205 206source "drivers/pci/Kconfig" 207 208endif 209 210config SUN_OPENPROMFS 211 tristate "Openprom tree appears in /proc/openprom" 212 help 213 If you say Y, the OpenPROM device tree will be available as a 214 virtual file system, which you can mount to /proc/openprom by "mount 215 -t openpromfs none /proc/openprom". 216 217 To compile the /proc/openprom support as a module, choose M here: the 218 module will be called openpromfs. 219 220 Only choose N if you know in advance that you will not need to modify 221 OpenPROM settings on the running system. 222 223config SPARC_LED 224 tristate "Sun4m LED driver" 225 help 226 This driver toggles the front-panel LED on sun4m systems 227 in a user-specifiable manner. Its state can be probed 228 by reading /proc/led and its blinking mode can be changed 229 via writes to /proc/led 230 231source "fs/Kconfig.binfmt" 232 233config SUNOS_EMUL 234 bool "SunOS binary emulation" 235 help 236 This allows you to run most SunOS binaries. If you want to do this, 237 say Y here and place appropriate files in /usr/gnemul/sunos. See 238 <http://www.ultralinux.org/faq.html> for more information. If you 239 want to run SunOS binaries on an Ultra you must also say Y to 240 "Kernel support for 32-bit a.out binaries" above. 241 242source "mm/Kconfig" 243 244endmenu 245 246source "net/Kconfig" 247 248source "drivers/Kconfig" 249 250if !SUN4 251source "drivers/sbus/char/Kconfig" 252endif 253 254# This one must be before the filesystem configs. -DaveM 255 256menu "Unix98 PTY support" 257 258config UNIX98_PTYS 259 bool "Unix98 PTY support" 260 ---help--- 261 A pseudo terminal (PTY) is a software device consisting of two 262 halves: a master and a slave. The slave device behaves identical to 263 a physical terminal; the master device is used by a process to 264 read data from and write data to the slave, thereby emulating a 265 terminal. Typical programs for the master side are telnet servers 266 and xterms. 267 268 Linux has traditionally used the BSD-like names /dev/ptyxx for 269 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme 270 has a number of problems. The GNU C library glibc 2.1 and later, 271 however, supports the Unix98 naming standard: in order to acquire a 272 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo 273 terminal is then made available to the process and the pseudo 274 terminal slave can be accessed as /dev/pts/<number>. What was 275 traditionally /dev/ttyp2 will then be /dev/pts/2, for example. 276 277 The entries in /dev/pts/ are created on the fly by a virtual 278 file system; therefore, if you say Y here you should say Y to 279 "/dev/pts file system for Unix98 PTYs" as well. 280 281 If you want to say Y here, you need to have the C library glibc 2.1 282 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*"). 283 Read the instructions in <file:Documentation/Changes> pertaining to 284 pseudo terminals. It's safe to say N. 285 286config UNIX98_PTY_COUNT 287 int "Maximum number of Unix98 PTYs in use (0-2048)" 288 depends on UNIX98_PTYS 289 default "256" 290 help 291 The maximum number of Unix98 PTYs that can be used at any one time. 292 The default is 256, and should be enough for desktop systems. Server 293 machines which support incoming telnet/rlogin/ssh connections and/or 294 serve several X terminals may want to increase this: every incoming 295 connection and every xterm uses up one PTY. 296 297 When not in use, each additional set of 256 PTYs occupy 298 approximately 8 KB of kernel memory on 32-bit architectures. 299 300endmenu 301 302source "fs/Kconfig" 303 304menu "Instrumentation Support" 305 depends on EXPERIMENTAL 306 307source "arch/sparc/oprofile/Kconfig" 308 309endmenu 310 311source "arch/sparc/Kconfig.debug" 312 313source "security/Kconfig" 314 315source "crypto/Kconfig" 316 317source "lib/Kconfig" 318