arch/xtensa/Kconfig

   1 config FRAME_POINTER
   2         def_bool n
   3
   4 config ZONE_DMA
   5         def_bool y
   6
   7 config XTENSA
   8         def_bool y
   9         select HAVE_IDE
  10         select HAVE_GENERIC_HARDIRQS
  11         select GENERIC_IRQ_SHOW
  12         select GENERIC_CPU_DEVICES
  13         help
  14           Xtensa processors are 32-bit RISC machines designed by Tensilica
  15           primarily for embedded systems.  These processors are both
  16           configurable and extensible.  The Linux port to the Xtensa
  17           architecture supports all processor configurations and extensions,
  18           with reasonable minimum requirements.  The Xtensa Linux project has
  19           a home page at <http://xtensa.sourceforge.net/>.
  20
  21 config RWSEM_XCHGADD_ALGORITHM
  22         def_bool y
  23
  24 config GENERIC_HWEIGHT
  25         def_bool y
  26
  27 config GENERIC_GPIO
  28         def_bool y
  29
  30 config ARCH_HAS_ILOG2_U32
  31         def_bool n
  32
  33 config ARCH_HAS_ILOG2_U64
  34         def_bool n
  35
  36 config NO_IOPORT
  37         def_bool y
  38
  39 config HZ
  40         int
  41         default 100
  42
  43 source "init/Kconfig"
  44 source "kernel/Kconfig.freezer"
  45
  46 config MMU
  47         def_bool n
  48
  49 config VARIANT_IRQ_SWITCH
  50         def_bool n
  51
  52 menu "Processor type and features"
  53
  54 choice
  55         prompt "Xtensa Processor Configuration"
  56         default XTENSA_VARIANT_FSF
  57
  58 config XTENSA_VARIANT_FSF
  59         bool "fsf - default (not generic) configuration"
  60         select MMU
  61
  62 config XTENSA_VARIANT_DC232B
  63         bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
  64         select MMU
  65         help
  66           This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
  67
  68 config XTENSA_VARIANT_S6000
  69         bool "s6000 - Stretch software configurable processor"
  70         select VARIANT_IRQ_SWITCH
  71         select ARCH_REQUIRE_GPIOLIB
  72         select XTENSA_CALIBRATE_CCOUNT
  73 endchoice
  74
  75 config XTENSA_UNALIGNED_USER
  76         bool "Unaligned memory access in use space"
  77         help
  78           The Xtensa architecture currently does not handle unaligned
  79           memory accesses in hardware but through an exception handler.
  80           Per default, unaligned memory accesses are disabled in user space.
  81
  82           Say Y here to enable unaligned memory access in user space.
  83
  84 source "kernel/Kconfig.preempt"
  85
  86 config MATH_EMULATION
  87         bool "Math emulation"
  88         help
  89         Can we use information of configuration file?
  90
  91 endmenu
  92
  93 config XTENSA_CALIBRATE_CCOUNT
  94         def_bool n
  95         help
  96           On some platforms (XT2000, for example), the CPU clock rate can
  97           vary.  The frequency can be determined, however, by measuring
  98           against a well known, fixed frequency, such as an UART oscillator.
  99
 100 config SERIAL_CONSOLE
 101         def_bool n
 102
 103 config XTENSA_ISS_NETWORK
 104         def_bool n
 105
 106 menu "Bus options"
 107
 108 config PCI
 109         bool "PCI support"
 110         default y
 111         help
 112           Find out whether you have a PCI motherboard. PCI is the name of a
 113           bus system, i.e. the way the CPU talks to the other stuff inside
 114           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 115           VESA. If you have PCI, say Y, otherwise N.
 116
 117 source "drivers/pci/Kconfig"
 118
 119 endmenu
 120
 121 menu "Platform options"
 122
 123 choice
 124         prompt "Xtensa System Type"
 125         default XTENSA_PLATFORM_ISS
 126
 127 config XTENSA_PLATFORM_ISS
 128         bool "ISS"
 129         select XTENSA_CALIBRATE_CCOUNT
 130         select SERIAL_CONSOLE
 131         select XTENSA_ISS_NETWORK
 132         help
 133           ISS is an acronym for Tensilica's Instruction Set Simulator.
 134
 135 config XTENSA_PLATFORM_XT2000
 136         bool "XT2000"
 137         help
 138           XT2000 is the name of Tensilica's feature-rich emulation platform.
 139           This hardware is capable of running a full Linux distribution.
 140
 141 config XTENSA_PLATFORM_S6105
 142         bool "S6105"
 143         select SERIAL_CONSOLE
 144
 145 endchoice
 146
 147
 148 config XTENSA_CPU_CLOCK
 149         int "CPU clock rate [MHz]"
 150         depends on !XTENSA_CALIBRATE_CCOUNT
 151         default 16
 152
 153 config GENERIC_CALIBRATE_DELAY
 154         bool "Auto calibration of the BogoMIPS value"
 155         help
 156           The BogoMIPS value can easily be derived from the CPU frequency.
 157
 158 config CMDLINE_BOOL
 159         bool "Default bootloader kernel arguments"
 160
 161 config CMDLINE
 162         string "Initial kernel command string"
 163         depends on CMDLINE_BOOL
 164         default "console=ttyS0,38400 root=/dev/ram"
 165         help
 166           On some architectures (EBSA110 and CATS), there is currently no way
 167           for the boot loader to pass arguments to the kernel. For these
 168           architectures, you should supply some command-line options at build
 169           time by entering them here. As a minimum, you should specify the
 170           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 171
 172 source "mm/Kconfig"
 173
 174 config HOTPLUG
 175         bool "Support for hot-pluggable devices"
 176         help
 177           Say Y here if you want to plug devices into your computer while
 178           the system is running, and be able to use them quickly.  In many
 179           cases, the devices can likewise be unplugged at any time too.
 180
 181           One well known example of this is PCMCIA- or PC-cards, credit-card
 182           size devices such as network cards, modems or hard drives which are
 183           plugged into slots found on all modern laptop computers.  Another
 184           example, used on modern desktops as well as laptops, is USB.
 185
 186           Enable HOTPLUG and build a modular kernel.  Get agent software
 187           (from <http://linux-hotplug.sourceforge.net/>) and install it.
 188           Then your kernel will automatically call out to a user mode "policy
 189           agent" (/sbin/hotplug) to load modules and set up software needed
 190           to use devices as you hotplug them.
 191
 192 source "drivers/pcmcia/Kconfig"
 193
 194 source "drivers/pci/hotplug/Kconfig"
 195
 196 endmenu
 197
 198 menu "Executable file formats"
 199
 200 # only elf supported
 201 config KCORE_ELF
 202         def_bool y
 203         depends on PROC_FS
 204         help
 205           If you enabled support for /proc file system then the file
 206           /proc/kcore will contain the kernel core image in ELF format. This
 207           can be used in gdb:
 208
 209           $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
 210
 211           This is especially useful if you have compiled the kernel with the
 212           "-g" option to preserve debugging information. It is mainly used
 213           for examining kernel data structures on the live kernel.
 214
 215 source "fs/Kconfig.binfmt"
 216
 217 endmenu
 218
 219 source "net/Kconfig"
 220
 221 source "drivers/Kconfig"
 222
 223 source "fs/Kconfig"
 224
 225 menu "Xtensa initrd options"
 226         depends on BLK_DEV_INITRD
 227
 228 config EMBEDDED_RAMDISK
 229         bool "Embed root filesystem ramdisk into the kernel"
 230
 231 config EMBEDDED_RAMDISK_IMAGE
 232         string "Filename of gzipped ramdisk image"
 233         depends on EMBEDDED_RAMDISK
 234         default "ramdisk.gz"
 235         help
 236           This is the filename of the ramdisk image to be built into the
 237           kernel.  Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
 238           The ramdisk image is not part of the kernel distribution; you must
 239           provide one yourself.
 240 endmenu
 241
 242 source "arch/xtensa/Kconfig.debug"
 243
 244 source "security/Kconfig"
 245
 246 source "crypto/Kconfig"
 247
 248 source "lib/Kconfig"
 249
 250