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 VIRT_TO_BUS
  13         select GENERIC_IRQ_SHOW
  14         select GENERIC_CPU_DEVICES
  15         select MODULES_USE_ELF_RELA
  16         select GENERIC_PCI_IOMAP
  17         select ARCH_WANT_IPC_PARSE_VERSION
  18         select ARCH_WANT_OPTIONAL_GPIOLIB
  19         select CLONE_BACKWARDS
  20         select IRQ_DOMAIN
  21         select HAVE_OPROFILE
  22         help
  23           Xtensa processors are 32-bit RISC machines designed by Tensilica
  24           primarily for embedded systems.  These processors are both
  25           configurable and extensible.  The Linux port to the Xtensa
  26           architecture supports all processor configurations and extensions,
  27           with reasonable minimum requirements.  The Xtensa Linux project has
  28           a home page at <http://www.linux-xtensa.org/>.
  29
  30 config RWSEM_XCHGADD_ALGORITHM
  31         def_bool y
  32
  33 config GENERIC_HWEIGHT
  34         def_bool y
  35
  36 config ARCH_HAS_ILOG2_U32
  37         def_bool n
  38
  39 config ARCH_HAS_ILOG2_U64
  40         def_bool n
  41
  42 config NO_IOPORT
  43         def_bool n
  44
  45 config HZ
  46         int
  47         default 100
  48
  49 source "init/Kconfig"
  50 source "kernel/Kconfig.freezer"
  51
  52 config MMU
  53         def_bool n
  54
  55 config VARIANT_IRQ_SWITCH
  56         def_bool n
  57
  58 menu "Processor type and features"
  59
  60 choice
  61         prompt "Xtensa Processor Configuration"
  62         default XTENSA_VARIANT_FSF
  63
  64 config XTENSA_VARIANT_FSF
  65         bool "fsf - default (not generic) configuration"
  66         select MMU
  67
  68 config XTENSA_VARIANT_DC232B
  69         bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
  70         select MMU
  71         help
  72           This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
  73
  74 config XTENSA_VARIANT_DC233C
  75         bool "dc233c - Diamond 233L Standard Core Rev.C (LE)"
  76         select MMU
  77         help
  78           This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE).
  79
  80 config XTENSA_VARIANT_S6000
  81         bool "s6000 - Stretch software configurable processor"
  82         select VARIANT_IRQ_SWITCH
  83         select ARCH_REQUIRE_GPIOLIB
  84         select XTENSA_CALIBRATE_CCOUNT
  85 endchoice
  86
  87 config XTENSA_UNALIGNED_USER
  88         bool "Unaligned memory access in use space"
  89         help
  90           The Xtensa architecture currently does not handle unaligned
  91           memory accesses in hardware but through an exception handler.
  92           Per default, unaligned memory accesses are disabled in user space.
  93
  94           Say Y here to enable unaligned memory access in user space.
  95
  96 source "kernel/Kconfig.preempt"
  97
  98 config MATH_EMULATION
  99         bool "Math emulation"
 100         help
 101         Can we use information of configuration file?
 102
 103 endmenu
 104
 105 config XTENSA_CALIBRATE_CCOUNT
 106         def_bool n
 107         help
 108           On some platforms (XT2000, for example), the CPU clock rate can
 109           vary.  The frequency can be determined, however, by measuring
 110           against a well known, fixed frequency, such as an UART oscillator.
 111
 112 config SERIAL_CONSOLE
 113         def_bool n
 114
 115 config XTENSA_ISS_NETWORK
 116         def_bool n
 117
 118 menu "Bus options"
 119
 120 config PCI
 121         bool "PCI support"
 122         default y
 123         help
 124           Find out whether you have a PCI motherboard. PCI is the name of a
 125           bus system, i.e. the way the CPU talks to the other stuff inside
 126           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 127           VESA. If you have PCI, say Y, otherwise N.
 128
 129 source "drivers/pci/Kconfig"
 130
 131 endmenu
 132
 133 menu "Platform options"
 134
 135 choice
 136         prompt "Xtensa System Type"
 137         default XTENSA_PLATFORM_ISS
 138
 139 config XTENSA_PLATFORM_ISS
 140         bool "ISS"
 141         depends on TTY
 142         select XTENSA_CALIBRATE_CCOUNT
 143         select SERIAL_CONSOLE
 144         select XTENSA_ISS_NETWORK
 145         help
 146           ISS is an acronym for Tensilica's Instruction Set Simulator.
 147
 148 config XTENSA_PLATFORM_XT2000
 149         bool "XT2000"
 150         help
 151           XT2000 is the name of Tensilica's feature-rich emulation platform.
 152           This hardware is capable of running a full Linux distribution.
 153
 154 config XTENSA_PLATFORM_S6105
 155         bool "S6105"
 156         select SERIAL_CONSOLE
 157         select NO_IOPORT
 158
 159 config XTENSA_PLATFORM_XTFPGA
 160         bool "XTFPGA"
 161         select SERIAL_CONSOLE
 162         select ETHOC
 163         select XTENSA_CALIBRATE_CCOUNT
 164         help
 165           XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
 166           This hardware is capable of running a full Linux distribution.
 167
 168 endchoice
 169
 170
 171 config XTENSA_CPU_CLOCK
 172         int "CPU clock rate [MHz]"
 173         depends on !XTENSA_CALIBRATE_CCOUNT
 174         default 16
 175
 176 config GENERIC_CALIBRATE_DELAY
 177         bool "Auto calibration of the BogoMIPS value"
 178         help
 179           The BogoMIPS value can easily be derived from the CPU frequency.
 180
 181 config CMDLINE_BOOL
 182         bool "Default bootloader kernel arguments"
 183
 184 config CMDLINE
 185         string "Initial kernel command string"
 186         depends on CMDLINE_BOOL
 187         default "console=ttyS0,38400 root=/dev/ram"
 188         help
 189           On some architectures (EBSA110 and CATS), there is currently no way
 190           for the boot loader to pass arguments to the kernel. For these
 191           architectures, you should supply some command-line options at build
 192           time by entering them here. As a minimum, you should specify the
 193           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 194
 195 config USE_OF
 196         bool "Flattened Device Tree support"
 197         select OF
 198         select OF_EARLY_FLATTREE
 199         help
 200           Include support for flattened device tree machine descriptions.
 201
 202 config BUILTIN_DTB
 203         string "DTB to build into the kernel image"
 204         depends on OF
 205
 206 config BLK_DEV_SIMDISK
 207         tristate "Host file-based simulated block device support"
 208         default n
 209         depends on XTENSA_PLATFORM_ISS
 210         help
 211           Create block devices that map to files in the host file system.
 212           Device binding to host file may be changed at runtime via proc
 213           interface provided the device is not in use.
 214
 215 config BLK_DEV_SIMDISK_COUNT
 216         int "Number of host file-based simulated block devices"
 217         range 1 10
 218         depends on BLK_DEV_SIMDISK
 219         default 2
 220         help
 221           This is the default minimal number of created block devices.
 222           Kernel/module parameter 'simdisk_count' may be used to change this
 223           value at runtime. More file names (but no more than 10) may be
 224           specified as parameters, simdisk_count grows accordingly.
 225
 226 config SIMDISK0_FILENAME
 227         string "Host filename for the first simulated device"
 228         depends on BLK_DEV_SIMDISK = y
 229         default ""
 230         help
 231           Attach a first simdisk to a host file. Conventionally, this file
 232           contains a root file system.
 233
 234 config SIMDISK1_FILENAME
 235         string "Host filename for the second simulated device"
 236         depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1
 237         default ""
 238         help
 239           Another simulated disk in a host file for a buildroot-independent
 240           storage.
 241
 242 source "mm/Kconfig"
 243
 244 source "drivers/pcmcia/Kconfig"
 245
 246 source "drivers/pci/hotplug/Kconfig"
 247
 248 endmenu
 249
 250 menu "Executable file formats"
 251
 252 # only elf supported
 253 config KCORE_ELF
 254         def_bool y
 255         depends on PROC_FS
 256         help
 257           If you enabled support for /proc file system then the file
 258           /proc/kcore will contain the kernel core image in ELF format. This
 259           can be used in gdb:
 260
 261           $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
 262
 263           This is especially useful if you have compiled the kernel with the
 264           "-g" option to preserve debugging information. It is mainly used
 265           for examining kernel data structures on the live kernel.
 266
 267 source "fs/Kconfig.binfmt"
 268
 269 endmenu
 270
 271 source "net/Kconfig"
 272
 273 source "drivers/Kconfig"
 274
 275 source "fs/Kconfig"
 276
 277 source "arch/xtensa/Kconfig.debug"
 278
 279 source "security/Kconfig"
 280
 281 source "crypto/Kconfig"
 282
 283 source "lib/Kconfig"
 284
 285