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