arch/sparc/Kconfig

   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
   6 mainmenu "Linux/SPARC Kernel Configuration"
   7
   8 config MMU
   9         bool
  10         default y
  11
  12 config HIGHMEM
  13         bool
  14         default y
  15
  16 config ZONE_DMA
  17         bool
  18         default y
  19
  20 config GENERIC_ISA_DMA
  21         bool
  22         default y
  23
  24 config ARCH_NO_VIRT_TO_BUS
  25         def_bool y
  26
  27 config OF
  28         def_bool y
  29
  30 source "init/Kconfig"
  31
  32 menu "General machine setup"
  33
  34 config SMP
  35         bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
  36         ---help---
  37           This enables support for systems with more than one CPU. If you have
  38           a system with only one CPU, say N. If you have a system with more
  39           than one CPU, say Y.
  40
  41           If you say N here, the kernel will run on single and multiprocessor
  42           machines, but will use only one CPU of a multiprocessor machine. If
  43           you say Y here, the kernel will run on many, but not all,
  44           singleprocessor machines. On a singleprocessor machine, the kernel
  45           will run faster if you say N here.
  46
  47           People using multiprocessor machines who say Y here should also say
  48           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
  49           Management" code will be disabled if you say Y here.
  50
  51           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
  52           available at <http://www.tldp.org/docs.html#howto>.
  53
  54           If you don't know what to do here, say N.
  55
  56 config NR_CPUS
  57         int "Maximum number of CPUs (2-32)"
  58         range 2 32
  59         depends on SMP
  60         default "32"
  61
  62 config SPARC
  63         bool
  64         default y
  65
  66 # Identify this as a Sparc32 build
  67 config SPARC32
  68         bool
  69         default y
  70         help
  71           SPARC is a family of RISC microprocessors designed and marketed by
  72           Sun Microsystems, incorporated.  They are very widely found in Sun
  73           workstations and clones. This port covers the original 32-bit SPARC;
  74           it is old and stable and usually considered one of the "big three"
  75           along with the Intel and Alpha ports.  The UltraLinux project
  76           maintains both the SPARC32 and SPARC64 ports; its web page is
  77           available at <http://www.ultralinux.org/>.
  78
  79 # Global things across all Sun machines.
  80 config ISA
  81         bool
  82         help
  83           ISA is found on Espresso only and is not supported currently.
  84           Say N
  85
  86 config EISA
  87         bool
  88         help
  89           EISA is not supported.
  90           Say N
  91
  92 config MCA
  93         bool
  94         help
  95           MCA is not supported.
  96           Say N
  97
  98 config PCMCIA
  99         tristate
 100         ---help---
 101           Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
 102           computer.  These are credit-card size devices such as network cards,
 103           modems or hard drives often used with laptops computers.  There are
 104           actually two varieties of these cards: the older 16 bit PCMCIA cards
 105           and the newer 32 bit CardBus cards.  If you want to use CardBus
 106           cards, you need to say Y here and also to "CardBus support" below.
 107
 108           To use your PC-cards, you will need supporting software from David
 109           Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
 110           for location).  Please also read the PCMCIA-HOWTO, available from
 111           <http://www.tldp.org/docs.html#howto>.
 112
 113           To compile this driver as modules, choose M here: the
 114           modules will be called pcmcia_core and ds.
 115
 116 config SBUS
 117         bool
 118         default y
 119
 120 config SBUSCHAR
 121         bool
 122         default y
 123
 124 config SERIAL_CONSOLE
 125         bool
 126         default y
 127         ---help---
 128           If you say Y here, it will be possible to use a serial port as the
 129           system console (the system console is the device which receives all
 130           kernel messages and warnings and which allows logins in single user
 131           mode). This could be useful if some terminal or printer is connected
 132           to that serial port.
 133
 134           Even if you say Y here, the currently visible virtual console
 135           (/dev/tty0) will still be used as the system console by default, but
 136           you can alter that using a kernel command line option such as
 137           "console=ttyS1". (Try "man bootparam" or see the documentation of
 138           your boot loader (silo) about how to pass options to the kernel at
 139           boot time.)
 140
 141           If you don't have a graphics card installed and you say Y here, the
 142           kernel will automatically use the first serial line, /dev/ttyS0, as
 143           system console.
 144
 145           If unsure, say N.
 146
 147 config SUN_AUXIO
 148         bool
 149         default y
 150
 151 config SUN_IO
 152         bool
 153         default y
 154
 155 config RWSEM_GENERIC_SPINLOCK
 156         bool
 157         default y
 158
 159 config RWSEM_XCHGADD_ALGORITHM
 160         bool
 161
 162 config GENERIC_FIND_NEXT_BIT
 163         bool
 164         default y
 165
 166 config GENERIC_HWEIGHT
 167         bool
 168         default y
 169
 170 config GENERIC_CALIBRATE_DELAY
 171         bool
 172         default y
 173
 174 config ARCH_MAY_HAVE_PC_FDC
 175         bool
 176         default y
 177
 178 config ARCH_HAS_ILOG2_U32
 179         bool
 180         default n
 181
 182 config ARCH_HAS_ILOG2_U64
 183         bool
 184         default n
 185
 186 config EMULATED_CMPXCHG
 187         bool
 188         default y
 189         help
 190           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 191           is emulated, and therefore it is not completely atomic.
 192
 193 config SUN_PM
 194         bool
 195         default y
 196         help
 197           Enable power management and CPU standby features on supported
 198           SPARC platforms.
 199
 200 config SUN4
 201         bool "Support for SUN4 machines (disables SUN4[CDM] support)"
 202         depends on !SMP
 203         default n
 204         help
 205           Say Y here if, and only if, your machine is a sun4. Note that
 206           a kernel compiled with this option will run only on sun4.
 207           (And the current version will probably work only on sun4/330.)
 208
 209 if !SUN4
 210
 211 config PCI
 212         bool "Support for PCI and PS/2 keyboard/mouse"
 213         help
 214           CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
 215           CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
 216           All of these platforms are extremely obscure, so say N if unsure.
 217
 218 config PCI_SYSCALL
 219         def_bool PCI
 220
 221 source "drivers/pci/Kconfig"
 222
 223 endif
 224
 225 config NO_DMA
 226         def_bool !PCI
 227
 228 config SUN_OPENPROMFS
 229         tristate "Openprom tree appears in /proc/openprom"
 230         help
 231           If you say Y, the OpenPROM device tree will be available as a
 232           virtual file system, which you can mount to /proc/openprom by "mount
 233           -t openpromfs none /proc/openprom".
 234
 235           To compile the /proc/openprom support as a module, choose M here: the
 236           module will be called openpromfs.
 237
 238           Only choose N if you know in advance that you will not need to modify
 239           OpenPROM settings on the running system.
 240
 241 config SPARC_LED
 242         tristate "Sun4m LED driver"
 243         help
 244           This driver toggles the front-panel LED on sun4m systems
 245           in a user-specifiable manner.  Its state can be probed
 246           by reading /proc/led and its blinking mode can be changed
 247           via writes to /proc/led
 248
 249 source "fs/Kconfig.binfmt"
 250
 251 config SUNOS_EMUL
 252         bool "SunOS binary emulation"
 253         help
 254           This allows you to run most SunOS binaries.  If you want to do this,
 255           say Y here and place appropriate files in /usr/gnemul/sunos. See
 256           <http://www.ultralinux.org/faq.html> for more information.  If you
 257           want to run SunOS binaries on an Ultra you must also say Y to
 258           "Kernel support for 32-bit a.out binaries" above.
 259
 260 source "mm/Kconfig"
 261
 262 endmenu
 263
 264 source "net/Kconfig"
 265
 266 source "drivers/Kconfig"
 267
 268 if !SUN4
 269 source "drivers/sbus/char/Kconfig"
 270 endif
 271
 272 # This one must be before the filesystem configs. -DaveM
 273
 274 menu "Unix98 PTY support"
 275
 276 config UNIX98_PTYS
 277         bool "Unix98 PTY support"
 278         ---help---
 279           A pseudo terminal (PTY) is a software device consisting of two
 280           halves: a master and a slave. The slave device behaves identical to
 281           a physical terminal; the master device is used by a process to
 282           read data from and write data to the slave, thereby emulating a
 283           terminal. Typical programs for the master side are telnet servers
 284           and xterms.
 285
 286           Linux has traditionally used the BSD-like names /dev/ptyxx for
 287           masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
 288           has a number of problems. The GNU C library glibc 2.1 and later,
 289           however, supports the Unix98 naming standard: in order to acquire a
 290           pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
 291           terminal is then made available to the process and the pseudo
 292           terminal slave can be accessed as /dev/pts/<number>. What was
 293           traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
 294
 295           The entries in /dev/pts/ are created on the fly by a virtual
 296           file system; therefore, if you say Y here you should say Y to
 297           "/dev/pts file system for Unix98 PTYs" as well.
 298
 299           If you want to say Y here, you need to have the C library glibc 2.1
 300           or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
 301           Read the instructions in <file:Documentation/Changes> pertaining to
 302           pseudo terminals. It's safe to say N.
 303
 304 config UNIX98_PTY_COUNT
 305         int "Maximum number of Unix98 PTYs in use (0-2048)"
 306         depends on UNIX98_PTYS
 307         default "256"
 308         help
 309           The maximum number of Unix98 PTYs that can be used at any one time.
 310           The default is 256, and should be enough for desktop systems. Server
 311           machines which support incoming telnet/rlogin/ssh connections and/or
 312           serve several X terminals may want to increase this: every incoming
 313           connection and every xterm uses up one PTY.
 314
 315           When not in use, each additional set of 256 PTYs occupy
 316           approximately 8 KB of kernel memory on 32-bit architectures.
 317
 318 endmenu
 319
 320 source "fs/Kconfig"
 321
 322 source "kernel/Kconfig.instrumentation"
 323
 324 source "arch/sparc/Kconfig.debug"
 325
 326 source "security/Kconfig"
 327
 328 source "crypto/Kconfig"
 329
 330 source "lib/Kconfig"