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 UID16 13 bool 14 default y 15 16config HIGHMEM 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 VT 29 bool 30 select INPUT 31 default y 32 ---help--- 33 If you say Y here, you will get support for terminal devices with 34 display and keyboard devices. These are called "virtual" because you 35 can run several virtual terminals (also called virtual consoles) on 36 one physical terminal. This is rather useful, for example one 37 virtual terminal can collect system messages and warnings, another 38 one can be used for a text-mode user session, and a third could run 39 an X session, all in parallel. Switching between virtual terminals 40 is done with certain key combinations, usually Alt-<function key>. 41 42 The setterm command ("man setterm") can be used to change the 43 properties (such as colors or beeping) of a virtual terminal. The 44 man page console_codes(4) ("man console_codes") contains the special 45 character sequences that can be used to change those properties 46 directly. The fonts used on virtual terminals can be changed with 47 the setfont ("man setfont") command and the key bindings are defined 48 with the loadkeys ("man loadkeys") command. 49 50 You need at least one virtual terminal device in order to make use 51 of your keyboard and monitor. Therefore, only people configuring an 52 embedded system would want to say N here in order to save some 53 memory; the only way to log into such a system is then via a serial 54 or network connection. 55 56 If unsure, say Y, or else you won't be able to do much with your new 57 shiny Linux system :-) 58 59config VT_CONSOLE 60 bool 61 default y 62 ---help--- 63 The system console is the device which receives all kernel messages 64 and warnings and which allows logins in single user mode. If you 65 answer Y here, a virtual terminal (the device used to interact with 66 a physical terminal) can be used as system console. This is the most 67 common mode of operations, so you should say Y here unless you want 68 the kernel messages be output only to a serial port (in which case 69 you should say Y to "Console on serial port", below). 70 71 If you do say Y here, by default the currently visible virtual 72 terminal (/dev/tty0) will be used as system console. You can change 73 that with a kernel command line option such as "console=tty3" which 74 would use the third virtual terminal as system console. (Try "man 75 bootparam" or see the documentation of your boot loader (lilo or 76 loadlin) about how to pass options to the kernel at boot time.) 77 78 If unsure, say Y. 79 80config HW_CONSOLE 81 bool 82 default y 83 84config SMP 85 bool "Symmetric multi-processing support (does not work on sun4/sun4c)" 86 depends on BROKEN 87 ---help--- 88 This enables support for systems with more than one CPU. If you have 89 a system with only one CPU, say N. If you have a system with more 90 than one CPU, say Y. 91 92 If you say N here, the kernel will run on single and multiprocessor 93 machines, but will use only one CPU of a multiprocessor machine. If 94 you say Y here, the kernel will run on many, but not all, 95 singleprocessor machines. On a singleprocessor machine, the kernel 96 will run faster if you say N here. 97 98 People using multiprocessor machines who say Y here should also say 99 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power 100 Management" code will be disabled if you say Y here. 101 102 See also the <file:Documentation/smp.txt>, 103 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 104 <http://www.tldp.org/docs.html#howto>. 105 106 If you don't know what to do here, say N. 107 108config NR_CPUS 109 int "Maximum number of CPUs (2-32)" 110 range 2 32 111 depends on SMP 112 default "32" 113 114# Identify this as a Sparc32 build 115config SPARC32 116 bool 117 default y 118 help 119 SPARC is a family of RISC microprocessors designed and marketed by 120 Sun Microsystems, incorporated. They are very widely found in Sun 121 workstations and clones. This port covers the original 32-bit SPARC; 122 it is old and stable and usually considered one of the "big three" 123 along with the Intel and Alpha ports. The UltraLinux project 124 maintains both the SPARC32 and SPARC64 ports; its web page is 125 available at <http://www.ultralinux.org/>. 126 127# Global things across all Sun machines. 128config ISA 129 bool 130 help 131 ISA is found on Espresso only and is not supported currently. 132 Say N 133 134config EISA 135 bool 136 help 137 EISA is not supported. 138 Say N 139 140config MCA 141 bool 142 help 143 MCA is not supported. 144 Say N 145 146config PCMCIA 147 tristate 148 ---help--- 149 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux 150 computer. These are credit-card size devices such as network cards, 151 modems or hard drives often used with laptops computers. There are 152 actually two varieties of these cards: the older 16 bit PCMCIA cards 153 and the newer 32 bit CardBus cards. If you want to use CardBus 154 cards, you need to say Y here and also to "CardBus support" below. 155 156 To use your PC-cards, you will need supporting software from David 157 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes> 158 for location). Please also read the PCMCIA-HOWTO, available from 159 <http://www.tldp.org/docs.html#howto>. 160 161 To compile this driver as modules, choose M here: the 162 modules will be called pcmcia_core and ds. 163 164config SBUS 165 bool 166 default y 167 168config SBUSCHAR 169 bool 170 default y 171 172config SERIAL_CONSOLE 173 bool 174 default y 175 ---help--- 176 If you say Y here, it will be possible to use a serial port as the 177 system console (the system console is the device which receives all 178 kernel messages and warnings and which allows logins in single user 179 mode). This could be useful if some terminal or printer is connected 180 to that serial port. 181 182 Even if you say Y here, the currently visible virtual console 183 (/dev/tty0) will still be used as the system console by default, but 184 you can alter that using a kernel command line option such as 185 "console=ttyS1". (Try "man bootparam" or see the documentation of 186 your boot loader (silo) about how to pass options to the kernel at 187 boot time.) 188 189 If you don't have a graphics card installed and you say Y here, the 190 kernel will automatically use the first serial line, /dev/ttyS0, as 191 system console. 192 193 If unsure, say N. 194 195config SUN_AUXIO 196 bool 197 default y 198 199config SUN_IO 200 bool 201 default y 202 203config RWSEM_GENERIC_SPINLOCK 204 bool 205 default y 206 207config RWSEM_XCHGADD_ALGORITHM 208 bool 209 210config GENERIC_CALIBRATE_DELAY 211 bool 212 default y 213 214config ARCH_MAY_HAVE_PC_FDC 215 bool 216 default y 217 218config SUN_PM 219 bool 220 default y 221 help 222 Enable power management and CPU standby features on supported 223 SPARC platforms. 224 225config SUN4 226 bool "Support for SUN4 machines (disables SUN4[CDM] support)" 227 depends on !SMP 228 default n 229 help 230 Say Y here if, and only if, your machine is a sun4. Note that 231 a kernel compiled with this option will run only on sun4. 232 (And the current version will probably work only on sun4/330.) 233 234if !SUN4 235 236config PCI 237 bool "Support for PCI and PS/2 keyboard/mouse" 238 help 239 CONFIG_PCI is needed for all JavaStation's (including MrCoffee), 240 CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC. 241 All of these platforms are extremely obscure, so say N if unsure. 242 243source "drivers/pci/Kconfig" 244 245endif 246 247config SUN_OPENPROMFS 248 tristate "Openprom tree appears in /proc/openprom" 249 help 250 If you say Y, the OpenPROM device tree will be available as a 251 virtual file system, which you can mount to /proc/openprom by "mount 252 -t openpromfs none /proc/openprom". 253 254 To compile the /proc/openprom support as a module, choose M here: the 255 module will be called openpromfs. 256 257 Only choose N if you know in advance that you will not need to modify 258 OpenPROM settings on the running system. 259 260source "fs/Kconfig.binfmt" 261 262config SUNOS_EMUL 263 bool "SunOS binary emulation" 264 help 265 This allows you to run most SunOS binaries. If you want to do this, 266 say Y here and place appropriate files in /usr/gnemul/sunos. See 267 <http://www.ultralinux.org/faq.html> for more information. If you 268 want to run SunOS binaries on an Ultra you must also say Y to 269 "Kernel support for 32-bit a.out binaries" above. 270 271source "mm/Kconfig" 272 273endmenu 274 275source "net/Kconfig" 276 277source "drivers/Kconfig" 278 279if !SUN4 280source "drivers/sbus/char/Kconfig" 281endif 282 283# This one must be before the filesystem configs. -DaveM 284 285menu "Unix98 PTY support" 286 287config UNIX98_PTYS 288 bool "Unix98 PTY support" 289 ---help--- 290 A pseudo terminal (PTY) is a software device consisting of two 291 halves: a master and a slave. The slave device behaves identical to 292 a physical terminal; the master device is used by a process to 293 read data from and write data to the slave, thereby emulating a 294 terminal. Typical programs for the master side are telnet servers 295 and xterms. 296 297 Linux has traditionally used the BSD-like names /dev/ptyxx for 298 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme 299 has a number of problems. The GNU C library glibc 2.1 and later, 300 however, supports the Unix98 naming standard: in order to acquire a 301 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo 302 terminal is then made available to the process and the pseudo 303 terminal slave can be accessed as /dev/pts/<number>. What was 304 traditionally /dev/ttyp2 will then be /dev/pts/2, for example. 305 306 The entries in /dev/pts/ are created on the fly by a virtual 307 file system; therefore, if you say Y here you should say Y to 308 "/dev/pts file system for Unix98 PTYs" as well. 309 310 If you want to say Y here, you need to have the C library glibc 2.1 311 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*"). 312 Read the instructions in <file:Documentation/Changes> pertaining to 313 pseudo terminals. It's safe to say N. 314 315config UNIX98_PTY_COUNT 316 int "Maximum number of Unix98 PTYs in use (0-2048)" 317 depends on UNIX98_PTYS 318 default "256" 319 help 320 The maximum number of Unix98 PTYs that can be used at any one time. 321 The default is 256, and should be enough for desktop systems. Server 322 machines which support incoming telnet/rlogin/ssh connections and/or 323 serve several X terminals may want to increase this: every incoming 324 connection and every xterm uses up one PTY. 325 326 When not in use, each additional set of 256 PTYs occupy 327 approximately 8 KB of kernel memory on 32-bit architectures. 328 329endmenu 330 331source "fs/Kconfig" 332 333source "arch/sparc/Kconfig.debug" 334 335source "security/Kconfig" 336 337source "crypto/Kconfig" 338 339source "lib/Kconfig" 340