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