arch/sparc/Kconfig

   1 # For a description of the syntax of this configuration file,
   2 # see Documentation/kbuild/kconfig-language.txt.
   3 #
   4
   5 mainmenu "Linux/SPARC Kernel Configuration"
   6
   7 config MMU
   8         bool
   9         default y
  10
  11 config HIGHMEM
  12         bool
  13         default y
  14
  15 config ZONE_DMA
  16         bool
  17         default y
  18
  19 config GENERIC_ISA_DMA
  20         bool
  21         default y
  22
  23 config ARCH_NO_VIRT_TO_BUS
  24         def_bool y
  25
  26 config OF
  27         def_bool y
  28
  29 config HZ
  30         int
  31         default 100
  32
  33 source "init/Kconfig"
  34
  35 menu "General machine setup"
  36
  37 config SMP
  38         bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
  39         ---help---
  40           This enables support for systems with more than one CPU. If you have
  41           a system with only one CPU, say N. If you have a system with more
  42           than one CPU, say Y.
  43
  44           If you say N here, the kernel will run on single and multiprocessor
  45           machines, but will use only one CPU of a multiprocessor machine. If
  46           you say Y here, the kernel will run on many, but not all,
  47           singleprocessor machines. On a singleprocessor machine, the kernel
  48           will run faster if you say N here.
  49
  50           People using multiprocessor machines who say Y here should also say
  51           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
  52           Management" code will be disabled if you say Y here.
  53
  54           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
  55           available at <http://www.tldp.org/docs.html#howto>.
  56
  57           If you don't know what to do here, say N.
  58
  59 config NR_CPUS
  60         int "Maximum number of CPUs (2-32)"
  61         range 2 32
  62         depends on SMP
  63         default "32"
  64
  65 config SPARC
  66         bool
  67         default y
  68         select HAVE_IDE
  69         select HAVE_OPROFILE
  70         select HAVE_ARCH_KGDB if !SMP
  71
  72 # Identify this as a Sparc32 build
  73 config SPARC32
  74         bool
  75         default y
  76         help
  77           SPARC is a family of RISC microprocessors designed and marketed by
  78           Sun Microsystems, incorporated.  They are very widely found in Sun
  79           workstations and clones. This port covers the original 32-bit SPARC;
  80           it is old and stable and usually considered one of the "big three"
  81           along with the Intel and Alpha ports.  The UltraLinux project
  82           maintains both the SPARC32 and SPARC64 ports; its web page is
  83           available at <http://www.ultralinux.org/>.
  84
  85 # Global things across all Sun machines.
  86 config ISA
  87         bool
  88         help
  89           ISA is found on Espresso only and is not supported currently.
  90           Say N
  91
  92 config EISA
  93         bool
  94         help
  95           EISA is not supported.
  96           Say N
  97
  98 config MCA
  99         bool
 100         help
 101           MCA is not supported.
 102           Say N
 103
 104 config PCMCIA
 105         tristate
 106         ---help---
 107           Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
 108           computer.  These are credit-card size devices such as network cards,
 109           modems or hard drives often used with laptops computers.  There are
 110           actually two varieties of these cards: the older 16 bit PCMCIA cards
 111           and the newer 32 bit CardBus cards.  If you want to use CardBus
 112           cards, you need to say Y here and also to "CardBus support" below.
 113
 114           To use your PC-cards, you will need supporting software from David
 115           Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
 116           for location).  Please also read the PCMCIA-HOWTO, available from
 117           <http://www.tldp.org/docs.html#howto>.
 118
 119           To compile this driver as modules, choose M here: the
 120           modules will be called pcmcia_core and ds.
 121
 122 config SBUS
 123         bool
 124         default y
 125
 126 config SBUSCHAR
 127         bool
 128         default y
 129
 130 config SERIAL_CONSOLE
 131         bool
 132         default y
 133         ---help---
 134           If you say Y here, it will be possible to use a serial port as the
 135           system console (the system console is the device which receives all
 136           kernel messages and warnings and which allows logins in single user
 137           mode). This could be useful if some terminal or printer is connected
 138           to that serial port.
 139
 140           Even if you say Y here, the currently visible virtual console
 141           (/dev/tty0) will still be used as the system console by default, but
 142           you can alter that using a kernel command line option such as
 143           "console=ttyS1". (Try "man bootparam" or see the documentation of
 144           your boot loader (silo) about how to pass options to the kernel at
 145           boot time.)
 146
 147           If you don't have a graphics card installed and you say Y here, the
 148           kernel will automatically use the first serial line, /dev/ttyS0, as
 149           system console.
 150
 151           If unsure, say N.
 152
 153 config SUN_AUXIO
 154         bool
 155         default y
 156
 157 config SUN_IO
 158         bool
 159         default y
 160
 161 config RWSEM_GENERIC_SPINLOCK
 162         bool
 163         default y
 164
 165 config RWSEM_XCHGADD_ALGORITHM
 166         bool
 167
 168 config GENERIC_FIND_NEXT_BIT
 169         bool
 170         default y
 171
 172 config GENERIC_HWEIGHT
 173         bool
 174         default y
 175
 176 config GENERIC_CALIBRATE_DELAY
 177         bool
 178         default y
 179
 180 config ARCH_MAY_HAVE_PC_FDC
 181         bool
 182         default y
 183
 184 config ARCH_HAS_ILOG2_U32
 185         bool
 186         default n
 187
 188 config ARCH_HAS_ILOG2_U64
 189         bool
 190         default n
 191
 192 config EMULATED_CMPXCHG
 193         bool
 194         default y
 195         help
 196           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 197           is emulated, and therefore it is not completely atomic.
 198
 199 config SUN_PM
 200         bool
 201         default y
 202         help
 203           Enable power management and CPU standby features on supported
 204           SPARC platforms.
 205
 206 config SUN4
 207         bool "Support for SUN4 machines (disables SUN4[CDM] support)"
 208         depends on !SMP
 209         default n
 210         help
 211           Say Y here if, and only if, your machine is a sun4. Note that
 212           a kernel compiled with this option will run only on sun4.
 213           (And the current version will probably work only on sun4/330.)
 214
 215 if !SUN4
 216
 217 config PCI
 218         bool "Support for PCI and PS/2 keyboard/mouse"
 219         help
 220           CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
 221           CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
 222           All of these platforms are extremely obscure, so say N if unsure.
 223
 224 config PCI_SYSCALL
 225         def_bool PCI
 226
 227 source "drivers/pci/Kconfig"
 228
 229 endif
 230
 231 config NO_DMA
 232         def_bool !PCI
 233
 234 config SUN_OPENPROMFS
 235         tristate "Openprom tree appears in /proc/openprom"
 236         help
 237           If you say Y, the OpenPROM device tree will be available as a
 238           virtual file system, which you can mount to /proc/openprom by "mount
 239           -t openpromfs none /proc/openprom".
 240
 241           To compile the /proc/openprom support as a module, choose M here: the
 242           module will be called openpromfs.
 243
 244           Only choose N if you know in advance that you will not need to modify
 245           OpenPROM settings on the running system.
 246
 247 config SPARC_LED
 248         tristate "Sun4m LED driver"
 249         help
 250           This driver toggles the front-panel LED on sun4m systems
 251           in a user-specifiable manner.  Its state can be probed
 252           by reading /proc/led and its blinking mode can be changed
 253           via writes to /proc/led
 254
 255 source "fs/Kconfig.binfmt"
 256
 257 source "mm/Kconfig"
 258
 259 endmenu
 260
 261 source "net/Kconfig"
 262
 263 source "drivers/Kconfig"
 264
 265 if !SUN4
 266 source "drivers/sbus/char/Kconfig"
 267 endif
 268
 269 # This one must be before the filesystem configs. -DaveM
 270
 271 menu "Unix98 PTY support"
 272
 273 config UNIX98_PTYS
 274         bool "Unix98 PTY support"
 275         ---help---
 276           A pseudo terminal (PTY) is a software device consisting of two
 277           halves: a master and a slave. The slave device behaves identical to
 278           a physical terminal; the master device is used by a process to
 279           read data from and write data to the slave, thereby emulating a
 280           terminal. Typical programs for the master side are telnet servers
 281           and xterms.
 282
 283           Linux has traditionally used the BSD-like names /dev/ptyxx for
 284           masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
 285           has a number of problems. The GNU C library glibc 2.1 and later,
 286           however, supports the Unix98 naming standard: in order to acquire a
 287           pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
 288           terminal is then made available to the process and the pseudo
 289           terminal slave can be accessed as /dev/pts/<number>. What was
 290           traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
 291
 292           The entries in /dev/pts/ are created on the fly by a virtual
 293           file system; therefore, if you say Y here you should say Y to
 294           "/dev/pts file system for Unix98 PTYs" as well.
 295
 296           If you want to say Y here, you need to have the C library glibc 2.1
 297           or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
 298           Read the instructions in <file:Documentation/Changes> pertaining to
 299           pseudo terminals. It's safe to say N.
 300
 301 config UNIX98_PTY_COUNT
 302         int "Maximum number of Unix98 PTYs in use (0-2048)"
 303         depends on UNIX98_PTYS
 304         default "256"
 305         help
 306           The maximum number of Unix98 PTYs that can be used at any one time.
 307           The default is 256, and should be enough for desktop systems. Server
 308           machines which support incoming telnet/rlogin/ssh connections and/or
 309           serve several X terminals may want to increase this: every incoming
 310           connection and every xterm uses up one PTY.
 311
 312           When not in use, each additional set of 256 PTYs occupy
 313           approximately 8 KB of kernel memory on 32-bit architectures.
 314
 315 endmenu
 316
 317 source "fs/Kconfig"
 318
 319 source "arch/sparc/Kconfig.debug"
 320
 321 source "security/Kconfig"
 322
 323 source "crypto/Kconfig"
 324
 325 source "lib/Kconfig"