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 GENERIC_GPIO
  37         bool
  38
  39 config ARCH_HAS_ILOG2_U32
  40         def_bool n
  41
  42 config ARCH_HAS_ILOG2_U64
  43         def_bool n
  44
  45 config NO_IOPORT
  46         def_bool n
  47
  48 config HZ
  49         int
  50         default 100
  51
  52 source "init/Kconfig"
  53 source "kernel/Kconfig.freezer"
  54
  55 config MMU
  56         def_bool n
  57
  58 config VARIANT_IRQ_SWITCH
  59         def_bool n
  60
  61 menu "Processor type and features"
  62
  63 choice
  64         prompt "Xtensa Processor Configuration"
  65         default XTENSA_VARIANT_FSF
  66
  67 config XTENSA_VARIANT_FSF
  68         bool "fsf - default (not generic) configuration"
  69         select MMU
  70
  71 config XTENSA_VARIANT_DC232B
  72         bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
  73         select MMU
  74         help
  75           This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
  76
  77 config XTENSA_VARIANT_DC233C
  78         bool "dc233c - Diamond 233L Standard Core Rev.C (LE)"
  79         select MMU
  80         help
  81           This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE).
  82
  83 config XTENSA_VARIANT_S6000
  84         bool "s6000 - Stretch software configurable processor"
  85         select VARIANT_IRQ_SWITCH
  86         select ARCH_REQUIRE_GPIOLIB
  87         select XTENSA_CALIBRATE_CCOUNT
  88 endchoice
  89
  90 config XTENSA_UNALIGNED_USER
  91         bool "Unaligned memory access in use space"
  92         help
  93           The Xtensa architecture currently does not handle unaligned
  94           memory accesses in hardware but through an exception handler.
  95           Per default, unaligned memory accesses are disabled in user space.
  96
  97           Say Y here to enable unaligned memory access in user space.
  98
  99 source "kernel/Kconfig.preempt"
 100
 101 config MATH_EMULATION
 102         bool "Math emulation"
 103         help
 104         Can we use information of configuration file?
 105
 106 endmenu
 107
 108 config XTENSA_CALIBRATE_CCOUNT
 109         def_bool n
 110         help
 111           On some platforms (XT2000, for example), the CPU clock rate can
 112           vary.  The frequency can be determined, however, by measuring
 113           against a well known, fixed frequency, such as an UART oscillator.
 114
 115 config SERIAL_CONSOLE
 116         def_bool n
 117
 118 config XTENSA_ISS_NETWORK
 119         def_bool n
 120
 121 menu "Bus options"
 122
 123 config PCI
 124         bool "PCI support"
 125         default y
 126         help
 127           Find out whether you have a PCI motherboard. PCI is the name of a
 128           bus system, i.e. the way the CPU talks to the other stuff inside
 129           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 130           VESA. If you have PCI, say Y, otherwise N.
 131
 132 source "drivers/pci/Kconfig"
 133
 134 endmenu
 135
 136 menu "Platform options"
 137
 138 choice
 139         prompt "Xtensa System Type"
 140         default XTENSA_PLATFORM_ISS
 141
 142 config XTENSA_PLATFORM_ISS
 143         bool "ISS"
 144         depends on TTY
 145         select XTENSA_CALIBRATE_CCOUNT
 146         select SERIAL_CONSOLE
 147         select XTENSA_ISS_NETWORK
 148         help
 149           ISS is an acronym for Tensilica's Instruction Set Simulator.
 150
 151 config XTENSA_PLATFORM_XT2000
 152         bool "XT2000"
 153         help
 154           XT2000 is the name of Tensilica's feature-rich emulation platform.
 155           This hardware is capable of running a full Linux distribution.
 156
 157 config XTENSA_PLATFORM_S6105
 158         bool "S6105"
 159         select SERIAL_CONSOLE
 160         select NO_IOPORT
 161
 162 config XTENSA_PLATFORM_XTFPGA
 163         bool "XTFPGA"
 164         select SERIAL_CONSOLE
 165         select ETHOC
 166         select XTENSA_CALIBRATE_CCOUNT
 167         help
 168           XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
 169           This hardware is capable of running a full Linux distribution.
 170
 171 endchoice
 172
 173
 174 config XTENSA_CPU_CLOCK
 175         int "CPU clock rate [MHz]"
 176         depends on !XTENSA_CALIBRATE_CCOUNT
 177         default 16
 178
 179 config GENERIC_CALIBRATE_DELAY
 180         bool "Auto calibration of the BogoMIPS value"
 181         help
 182           The BogoMIPS value can easily be derived from the CPU frequency.
 183
 184 config CMDLINE_BOOL
 185         bool "Default bootloader kernel arguments"
 186
 187 config CMDLINE
 188         string "Initial kernel command string"
 189         depends on CMDLINE_BOOL
 190         default "console=ttyS0,38400 root=/dev/ram"
 191         help
 192           On some architectures (EBSA110 and CATS), there is currently no way
 193           for the boot loader to pass arguments to the kernel. For these
 194           architectures, you should supply some command-line options at build
 195           time by entering them here. As a minimum, you should specify the
 196           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 197
 198 config USE_OF
 199         bool "Flattened Device Tree support"
 200         select OF
 201         select OF_EARLY_FLATTREE
 202         help
 203           Include support for flattened device tree machine descriptions.
 204
 205 config BUILTIN_DTB
 206         string "DTB to build into the kernel image"
 207         depends on OF
 208
 209 config BLK_DEV_SIMDISK
 210         tristate "Host file-based simulated block device support"
 211         default n
 212         depends on XTENSA_PLATFORM_ISS
 213         help
 214           Create block devices that map to files in the host file system.
 215           Device binding to host file may be changed at runtime via proc
 216           interface provided the device is not in use.
 217
 218 config BLK_DEV_SIMDISK_COUNT
 219         int "Number of host file-based simulated block devices"
 220         range 1 10
 221         depends on BLK_DEV_SIMDISK
 222         default 2
 223         help
 224           This is the default minimal number of created block devices.
 225           Kernel/module parameter 'simdisk_count' may be used to change this
 226           value at runtime. More file names (but no more than 10) may be
 227           specified as parameters, simdisk_count grows accordingly.
 228
 229 config SIMDISK0_FILENAME
 230         string "Host filename for the first simulated device"
 231         depends on BLK_DEV_SIMDISK = y
 232         default ""
 233         help
 234           Attach a first simdisk to a host file. Conventionally, this file
 235           contains a root file system.
 236
 237 config SIMDISK1_FILENAME
 238         string "Host filename for the second simulated device"
 239         depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1
 240         default ""
 241         help
 242           Another simulated disk in a host file for a buildroot-independent
 243           storage.
 244
 245 source "mm/Kconfig"
 246
 247 source "drivers/pcmcia/Kconfig"
 248
 249 source "drivers/pci/hotplug/Kconfig"
 250
 251 endmenu
 252
 253 menu "Executable file formats"
 254
 255 # only elf supported
 256 config KCORE_ELF
 257         def_bool y
 258         depends on PROC_FS
 259         help
 260           If you enabled support for /proc file system then the file
 261           /proc/kcore will contain the kernel core image in ELF format. This
 262           can be used in gdb:
 263
 264           $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
 265
 266           This is especially useful if you have compiled the kernel with the
 267           "-g" option to preserve debugging information. It is mainly used
 268           for examining kernel data structures on the live kernel.
 269
 270 source "fs/Kconfig.binfmt"
 271
 272 endmenu
 273
 274 source "net/Kconfig"
 275
 276 source "drivers/Kconfig"
 277
 278 source "fs/Kconfig"
 279
 280 source "arch/xtensa/Kconfig.debug"
 281
 282 source "security/Kconfig"
 283
 284 source "crypto/Kconfig"
 285
 286 source "lib/Kconfig"
 287
 288