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         select GENERIC_PCI_IOMAP
  16         select ARCH_WANT_OPTIONAL_GPIOLIB
  17         select CLONE_BACKWARDS
  18         select IRQ_DOMAIN
  19         help
  20           Xtensa processors are 32-bit RISC machines designed by Tensilica
  21           primarily for embedded systems.  These processors are both
  22           configurable and extensible.  The Linux port to the Xtensa
  23           architecture supports all processor configurations and extensions,
  24           with reasonable minimum requirements.  The Xtensa Linux project has
  25           a home page at <http://xtensa.sourceforge.net/>.
  26
  27 config RWSEM_XCHGADD_ALGORITHM
  28         def_bool y
  29
  30 config GENERIC_HWEIGHT
  31         def_bool y
  32
  33 config GENERIC_GPIO
  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_S6000
  75         bool "s6000 - Stretch software configurable processor"
  76         select VARIANT_IRQ_SWITCH
  77         select ARCH_REQUIRE_GPIOLIB
  78         select XTENSA_CALIBRATE_CCOUNT
  79 endchoice
  80
  81 config XTENSA_UNALIGNED_USER
  82         bool "Unaligned memory access in use space"
  83         help
  84           The Xtensa architecture currently does not handle unaligned
  85           memory accesses in hardware but through an exception handler.
  86           Per default, unaligned memory accesses are disabled in user space.
  87
  88           Say Y here to enable unaligned memory access in user space.
  89
  90 source "kernel/Kconfig.preempt"
  91
  92 config MATH_EMULATION
  93         bool "Math emulation"
  94         help
  95         Can we use information of configuration file?
  96
  97 endmenu
  98
  99 config XTENSA_CALIBRATE_CCOUNT
 100         def_bool n
 101         help
 102           On some platforms (XT2000, for example), the CPU clock rate can
 103           vary.  The frequency can be determined, however, by measuring
 104           against a well known, fixed frequency, such as an UART oscillator.
 105
 106 config SERIAL_CONSOLE
 107         def_bool n
 108
 109 config XTENSA_ISS_NETWORK
 110         def_bool n
 111
 112 menu "Bus options"
 113
 114 config PCI
 115         bool "PCI support"
 116         default y
 117         help
 118           Find out whether you have a PCI motherboard. PCI is the name of a
 119           bus system, i.e. the way the CPU talks to the other stuff inside
 120           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 121           VESA. If you have PCI, say Y, otherwise N.
 122
 123 source "drivers/pci/Kconfig"
 124
 125 endmenu
 126
 127 menu "Platform options"
 128
 129 choice
 130         prompt "Xtensa System Type"
 131         default XTENSA_PLATFORM_ISS
 132
 133 config XTENSA_PLATFORM_ISS
 134         bool "ISS"
 135         select XTENSA_CALIBRATE_CCOUNT
 136         select SERIAL_CONSOLE
 137         select XTENSA_ISS_NETWORK
 138         help
 139           ISS is an acronym for Tensilica's Instruction Set Simulator.
 140
 141 config XTENSA_PLATFORM_XT2000
 142         bool "XT2000"
 143         help
 144           XT2000 is the name of Tensilica's feature-rich emulation platform.
 145           This hardware is capable of running a full Linux distribution.
 146
 147 config XTENSA_PLATFORM_S6105
 148         bool "S6105"
 149         select SERIAL_CONSOLE
 150         select NO_IOPORT
 151
 152 config XTENSA_PLATFORM_XTFPGA
 153         bool "XTFPGA"
 154         select SERIAL_CONSOLE
 155         select ETHOC
 156         select XTENSA_CALIBRATE_CCOUNT
 157         help
 158           XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
 159           This hardware is capable of running a full Linux distribution.
 160
 161 endchoice
 162
 163
 164 config XTENSA_CPU_CLOCK
 165         int "CPU clock rate [MHz]"
 166         depends on !XTENSA_CALIBRATE_CCOUNT
 167         default 16
 168
 169 config GENERIC_CALIBRATE_DELAY
 170         bool "Auto calibration of the BogoMIPS value"
 171         help
 172           The BogoMIPS value can easily be derived from the CPU frequency.
 173
 174 config CMDLINE_BOOL
 175         bool "Default bootloader kernel arguments"
 176
 177 config CMDLINE
 178         string "Initial kernel command string"
 179         depends on CMDLINE_BOOL
 180         default "console=ttyS0,38400 root=/dev/ram"
 181         help
 182           On some architectures (EBSA110 and CATS), there is currently no way
 183           for the boot loader to pass arguments to the kernel. For these
 184           architectures, you should supply some command-line options at build
 185           time by entering them here. As a minimum, you should specify the
 186           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 187
 188 config USE_OF
 189         bool "Flattened Device Tree support"
 190         select OF
 191         select OF_EARLY_FLATTREE
 192         help
 193           Include support for flattened device tree machine descriptions.
 194
 195 config BUILTIN_DTB
 196         string "DTB to build into the kernel image"
 197         depends on OF
 198
 199 source "mm/Kconfig"
 200
 201 source "drivers/pcmcia/Kconfig"
 202
 203 source "drivers/pci/hotplug/Kconfig"
 204
 205 endmenu
 206
 207 menu "Executable file formats"
 208
 209 # only elf supported
 210 config KCORE_ELF
 211         def_bool y
 212         depends on PROC_FS
 213         help
 214           If you enabled support for /proc file system then the file
 215           /proc/kcore will contain the kernel core image in ELF format. This
 216           can be used in gdb:
 217
 218           $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
 219
 220           This is especially useful if you have compiled the kernel with the
 221           "-g" option to preserve debugging information. It is mainly used
 222           for examining kernel data structures on the live kernel.
 223
 224 source "fs/Kconfig.binfmt"
 225
 226 endmenu
 227
 228 source "net/Kconfig"
 229
 230 source "drivers/Kconfig"
 231
 232 source "fs/Kconfig"
 233
 234 source "arch/xtensa/Kconfig.debug"
 235
 236 source "security/Kconfig"
 237
 238 source "crypto/Kconfig"
 239
 240 source "lib/Kconfig"
 241
 242