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