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 GENERIC_KERNEL_THREAD
  17         select GENERIC_KERNEL_EXECVE
  18         select ARCH_WANT_OPTIONAL_GPIOLIB
  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 endchoice
 153
 154
 155 config XTENSA_CPU_CLOCK
 156         int "CPU clock rate [MHz]"
 157         depends on !XTENSA_CALIBRATE_CCOUNT
 158         default 16
 159
 160 config GENERIC_CALIBRATE_DELAY
 161         bool "Auto calibration of the BogoMIPS value"
 162         help
 163           The BogoMIPS value can easily be derived from the CPU frequency.
 164
 165 config CMDLINE_BOOL
 166         bool "Default bootloader kernel arguments"
 167
 168 config CMDLINE
 169         string "Initial kernel command string"
 170         depends on CMDLINE_BOOL
 171         default "console=ttyS0,38400 root=/dev/ram"
 172         help
 173           On some architectures (EBSA110 and CATS), there is currently no way
 174           for the boot loader to pass arguments to the kernel. For these
 175           architectures, you should supply some command-line options at build
 176           time by entering them here. As a minimum, you should specify the
 177           memory size and the root device (e.g., mem=64M root=/dev/nfs).
 178
 179 source "mm/Kconfig"
 180
 181 source "drivers/pcmcia/Kconfig"
 182
 183 source "drivers/pci/hotplug/Kconfig"
 184
 185 endmenu
 186
 187 menu "Executable file formats"
 188
 189 # only elf supported
 190 config KCORE_ELF
 191         def_bool y
 192         depends on PROC_FS
 193         help
 194           If you enabled support for /proc file system then the file
 195           /proc/kcore will contain the kernel core image in ELF format. This
 196           can be used in gdb:
 197
 198           $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
 199
 200           This is especially useful if you have compiled the kernel with the
 201           "-g" option to preserve debugging information. It is mainly used
 202           for examining kernel data structures on the live kernel.
 203
 204 source "fs/Kconfig.binfmt"
 205
 206 endmenu
 207
 208 source "net/Kconfig"
 209
 210 source "drivers/Kconfig"
 211
 212 source "fs/Kconfig"
 213
 214 source "arch/xtensa/Kconfig.debug"
 215
 216 source "security/Kconfig"
 217
 218 source "crypto/Kconfig"
 219
 220 source "lib/Kconfig"
 221
 222