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 GENERIC_ATOMIC64
  11         select HAVE_GENERIC_HARDIRQS
  12         select GENERIC_IRQ_SHOW
  13         select GENERIC_CPU_DEVICES
  14         select MODULES_USE_ELF_RELA
  15         help
  16           Xtensa processors are 32-bit RISC machines designed by Tensilica
  17           primarily for embedded systems.  These processors are both
  18           configurable and extensible.  The Linux port to the Xtensa
  19           architecture supports all processor configurations and extensions,
  20           with reasonable minimum requirements.  The Xtensa Linux project has
  21           a home page at <http://xtensa.sourceforge.net/>.
  22
  23 config RWSEM_XCHGADD_ALGORITHM
  24         def_bool y
  25
  26 config GENERIC_HWEIGHT
  27         def_bool y
  28
  29 config GENERIC_GPIO
  30         def_bool y
  31
  32 config ARCH_HAS_ILOG2_U32
  33         def_bool n
  34
  35 config ARCH_HAS_ILOG2_U64
  36         def_bool n
  37
  38 config NO_IOPORT
  39         def_bool y
  40
  41 config HZ
  42         int
  43         default 100
  44
  45 source "init/Kconfig"
  46 source "kernel/Kconfig.freezer"
  47
  48 config MMU
  49         def_bool n
  50
  51 config VARIANT_IRQ_SWITCH
  52         def_bool n
  53
  54 menu "Processor type and features"
  55
  56 choice
  57         prompt "Xtensa Processor Configuration"
  58         default XTENSA_VARIANT_FSF
  59
  60 config XTENSA_VARIANT_FSF
  61         bool "fsf - default (not generic) configuration"
  62         select MMU
  63
  64 config XTENSA_VARIANT_DC232B
  65         bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
  66         select MMU
  67         help
  68           This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
  69
  70 config XTENSA_VARIANT_S6000
  71         bool "s6000 - Stretch software configurable processor"
  72         select VARIANT_IRQ_SWITCH
  73         select ARCH_REQUIRE_GPIOLIB
  74         select XTENSA_CALIBRATE_CCOUNT
  75 endchoice
  76
  77 config XTENSA_UNALIGNED_USER
  78         bool "Unaligned memory access in use space"
  79         help
  80           The Xtensa architecture currently does not handle unaligned
  81           memory accesses in hardware but through an exception handler.
  82           Per default, unaligned memory accesses are disabled in user space.
  83
  84           Say Y here to enable unaligned memory access in user space.
  85
  86 source "kernel/Kconfig.preempt"
  87
  88 config MATH_EMULATION
  89         bool "Math emulation"
  90         help
  91         Can we use information of configuration file?
  92
  93 endmenu
  94
  95 config XTENSA_CALIBRATE_CCOUNT
  96         def_bool n
  97         help
  98           On some platforms (XT2000, for example), the CPU clock rate can
  99           vary.  The frequency can be determined, however, by measuring
 100           against a well known, fixed frequency, such as an UART oscillator.
 101
 102 config SERIAL_CONSOLE
 103         def_bool n
 104
 105 config XTENSA_ISS_NETWORK
 106         def_bool n
 107
 108 menu "Bus options"
 109
 110 config PCI
 111         bool "PCI support"
 112         default y
 113         help
 114           Find out whether you have a PCI motherboard. PCI is the name of a
 115           bus system, i.e. the way the CPU talks to the other stuff inside
 116           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 117           VESA. If you have PCI, say Y, otherwise N.
 118
 119 source "drivers/pci/Kconfig"
 120
 121 endmenu
 122
 123 menu "Platform options"
 124
 125 choice
 126         prompt "Xtensa System Type"
 127         default XTENSA_PLATFORM_ISS
 128
 129 config XTENSA_PLATFORM_ISS
 130         bool "ISS"
 131         select XTENSA_CALIBRATE_CCOUNT
 132         select SERIAL_CONSOLE
 133         select XTENSA_ISS_NETWORK
 134         help
 135           ISS is an acronym for Tensilica's Instruction Set Simulator.
 136
 137 config XTENSA_PLATFORM_XT2000
 138         bool "XT2000"
 139         help
 140           XT2000 is the name of Tensilica's feature-rich emulation platform.
 141           This hardware is capable of running a full Linux distribution.
 142
 143 config XTENSA_PLATFORM_S6105
 144         bool "S6105"
 145         select SERIAL_CONSOLE
 146
 147 endchoice
 148
 149
 150 config XTENSA_CPU_CLOCK
 151         int "CPU clock rate [MHz]"
 152         depends on !XTENSA_CALIBRATE_CCOUNT
 153         default 16
 154
 155 config GENERIC_CALIBRATE_DELAY
 156         bool "Auto calibration of the BogoMIPS value"
 157         help
 158           The BogoMIPS value can easily be derived from the CPU frequency.
 159
 160 config CMDLINE_BOOL
 161         bool "Default bootloader kernel arguments"
 162
 163 config CMDLINE
 164         string "Initial kernel command string"
 165         depends on CMDLINE_BOOL
 166         default "console=ttyS0,38400 root=/dev/ram"
 167         help
 168           On some architectures (EBSA110 and CATS), there is currently no way
 169           for the boot loader to pass arguments to the kernel. For these
 170           architectures, you should supply some command-line options at build
 171           time by entering them here. As a minimum, you should specify the
 172           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 173
 174 source "mm/Kconfig"
 175
 176 config HOTPLUG
 177         bool "Support for hot-pluggable devices"
 178         help
 179           Say Y here if you want to plug devices into your computer while
 180           the system is running, and be able to use them quickly.  In many
 181           cases, the devices can likewise be unplugged at any time too.
 182
 183           One well known example of this is PCMCIA- or PC-cards, credit-card
 184           size devices such as network cards, modems or hard drives which are
 185           plugged into slots found on all modern laptop computers.  Another
 186           example, used on modern desktops as well as laptops, is USB.
 187
 188           Enable HOTPLUG and build a modular kernel.  Get agent software
 189           (from <http://linux-hotplug.sourceforge.net/>) and install it.
 190           Then your kernel will automatically call out to a user mode "policy
 191           agent" (/sbin/hotplug) to load modules and set up software needed
 192           to use devices as you hotplug them.
 193
 194 source "drivers/pcmcia/Kconfig"
 195
 196 source "drivers/pci/hotplug/Kconfig"
 197
 198 endmenu
 199
 200 menu "Executable file formats"
 201
 202 # only elf supported
 203 config KCORE_ELF
 204         def_bool y
 205         depends on PROC_FS
 206         help
 207           If you enabled support for /proc file system then the file
 208           /proc/kcore will contain the kernel core image in ELF format. This
 209           can be used in gdb:
 210
 211           $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
 212
 213           This is especially useful if you have compiled the kernel with the
 214           "-g" option to preserve debugging information. It is mainly used
 215           for examining kernel data structures on the live kernel.
 216
 217 source "fs/Kconfig.binfmt"
 218
 219 endmenu
 220
 221 source "net/Kconfig"
 222
 223 source "drivers/Kconfig"
 224
 225 source "fs/Kconfig"
 226
 227 menu "Xtensa initrd options"
 228         depends on BLK_DEV_INITRD
 229
 230 config EMBEDDED_RAMDISK
 231         bool "Embed root filesystem ramdisk into the kernel"
 232
 233 config EMBEDDED_RAMDISK_IMAGE
 234         string "Filename of gzipped ramdisk image"
 235         depends on EMBEDDED_RAMDISK
 236         default "ramdisk.gz"
 237         help
 238           This is the filename of the ramdisk image to be built into the
 239           kernel.  Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
 240           The ramdisk image is not part of the kernel distribution; you must
 241           provide one yourself.
 242 endmenu
 243
 244 source "arch/xtensa/Kconfig.debug"
 245
 246 source "security/Kconfig"
 247
 248 source "crypto/Kconfig"
 249
 250 source "lib/Kconfig"
 251
 252