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authorYuval Adam <_@yuv.al>2017-08-30 08:25:59 +0000
committerYuval Adam <_@yuv.al>2017-08-30 08:25:59 +0000
commit8e4bff4cab0ddac6060645b0715210484d02ff40 (patch)
tree3a5c3024371a04692a3a6d9974d001cdff8ebf84 /arch/xtensa/Kconfig
Initial file dump from open source releaseHEADmaster
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+config ZONE_DMA
+ def_bool y
+
+config XTENSA
+ def_bool y
+ select ARCH_WANT_FRAME_POINTERS
+ select HAVE_IDE
+ select GENERIC_ATOMIC64
+ select HAVE_GENERIC_HARDIRQS
+ select VIRT_TO_BUS
+ select GENERIC_IRQ_SHOW
+ select GENERIC_CPU_DEVICES
+ select MODULES_USE_ELF_RELA
+ select GENERIC_PCI_IOMAP
+ select ARCH_WANT_IPC_PARSE_VERSION
+ select ARCH_WANT_OPTIONAL_GPIOLIB
+ select CLONE_BACKWARDS
+ select IRQ_DOMAIN
+ select HAVE_OPROFILE
+ help
+ Xtensa processors are 32-bit RISC machines designed by Tensilica
+ primarily for embedded systems. These processors are both
+ configurable and extensible. The Linux port to the Xtensa
+ architecture supports all processor configurations and extensions,
+ with reasonable minimum requirements. The Xtensa Linux project has
+ a home page at <http://www.linux-xtensa.org/>.
+
+config RWSEM_XCHGADD_ALGORITHM
+ def_bool y
+
+config GENERIC_HWEIGHT
+ def_bool y
+
+config ARCH_HAS_ILOG2_U32
+ def_bool n
+
+config ARCH_HAS_ILOG2_U64
+ def_bool n
+
+config NO_IOPORT
+ def_bool n
+
+config HZ
+ int
+ default 100
+
+source "init/Kconfig"
+source "kernel/Kconfig.freezer"
+
+config LOCKDEP_SUPPORT
+ def_bool y
+
+config STACKTRACE_SUPPORT
+ def_bool y
+
+config TRACE_IRQFLAGS_SUPPORT
+ def_bool y
+
+config MMU
+ def_bool n
+
+config VARIANT_IRQ_SWITCH
+ def_bool n
+
+menu "Processor type and features"
+
+choice
+ prompt "Xtensa Processor Configuration"
+ default XTENSA_VARIANT_FSF
+
+config XTENSA_VARIANT_FSF
+ bool "fsf - default (not generic) configuration"
+ select MMU
+
+config XTENSA_VARIANT_DC232B
+ bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
+ select MMU
+ help
+ This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
+
+config XTENSA_VARIANT_DC233C
+ bool "dc233c - Diamond 233L Standard Core Rev.C (LE)"
+ select MMU
+ help
+ This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE).
+
+config XTENSA_VARIANT_S6000
+ bool "s6000 - Stretch software configurable processor"
+ select VARIANT_IRQ_SWITCH
+ select ARCH_REQUIRE_GPIOLIB
+ select XTENSA_CALIBRATE_CCOUNT
+endchoice
+
+config XTENSA_UNALIGNED_USER
+ bool "Unaligned memory access in use space"
+ help
+ The Xtensa architecture currently does not handle unaligned
+ memory accesses in hardware but through an exception handler.
+ Per default, unaligned memory accesses are disabled in user space.
+
+ Say Y here to enable unaligned memory access in user space.
+
+source "kernel/Kconfig.preempt"
+
+config MATH_EMULATION
+ bool "Math emulation"
+ help
+ Can we use information of configuration file?
+
+config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
+ bool "Initialize Xtensa MMU inside the Linux kernel code"
+ default y
+ help
+ Earlier version initialized the MMU in the exception vector
+ before jumping to _startup in head.S and had an advantage that
+ it was possible to place a software breakpoint at 'reset' and
+ then enter your normal kernel breakpoints once the MMU was mapped
+ to the kernel mappings (0XC0000000).
+
+ This unfortunately doesn't work for U-Boot and likley also wont
+ work for using KEXEC to have a hot kernel ready for doing a
+ KDUMP.
+
+ So now the MMU is initialized in head.S but it's necessary to
+ use hardware breakpoints (gdb 'hbreak' cmd) to break at _startup.
+ xt-gdb can't place a Software Breakpoint in the 0XD region prior
+ to mapping the MMU and after mapping even if the area of low memory
+ was mapped gdb wouldn't remove the breakpoint on hitting it as the
+ PC wouldn't match. Since Hardware Breakpoints are recommended for
+ Linux configurations it seems reasonable to just assume they exist
+ and leave this older mechanism for unfortunate souls that choose
+ not to follow Tensilica's recommendation.
+
+ Selecting this will cause U-Boot to set the KERNEL Load and Entry
+ address at 0x00003000 instead of the mapped std of 0xD0003000.
+
+ If in doubt, say Y.
+
+endmenu
+
+config XTENSA_CALIBRATE_CCOUNT
+ def_bool n
+ help
+ On some platforms (XT2000, for example), the CPU clock rate can
+ vary. The frequency can be determined, however, by measuring
+ against a well known, fixed frequency, such as an UART oscillator.
+
+config SERIAL_CONSOLE
+ def_bool n
+
+config XTENSA_ISS_NETWORK
+ def_bool n
+
+menu "Bus options"
+
+config PCI
+ bool "PCI support"
+ default y
+ help
+ Find out whether you have a PCI motherboard. PCI is the name of a
+ bus system, i.e. the way the CPU talks to the other stuff inside
+ your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
+ VESA. If you have PCI, say Y, otherwise N.
+
+source "drivers/pci/Kconfig"
+
+endmenu
+
+menu "Platform options"
+
+choice
+ prompt "Xtensa System Type"
+ default XTENSA_PLATFORM_ISS
+
+config XTENSA_PLATFORM_ISS
+ bool "ISS"
+ depends on TTY
+ select XTENSA_CALIBRATE_CCOUNT
+ select SERIAL_CONSOLE
+ select XTENSA_ISS_NETWORK
+ help
+ ISS is an acronym for Tensilica's Instruction Set Simulator.
+
+config XTENSA_PLATFORM_XT2000
+ bool "XT2000"
+ help
+ XT2000 is the name of Tensilica's feature-rich emulation platform.
+ This hardware is capable of running a full Linux distribution.
+
+config XTENSA_PLATFORM_S6105
+ bool "S6105"
+ select SERIAL_CONSOLE
+ select NO_IOPORT
+
+config XTENSA_PLATFORM_XTFPGA
+ bool "XTFPGA"
+ select SERIAL_CONSOLE
+ select ETHOC
+ select XTENSA_CALIBRATE_CCOUNT
+ help
+ XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
+ This hardware is capable of running a full Linux distribution.
+
+endchoice
+
+
+config XTENSA_CPU_CLOCK
+ int "CPU clock rate [MHz]"
+ depends on !XTENSA_CALIBRATE_CCOUNT
+ default 16
+
+config GENERIC_CALIBRATE_DELAY
+ bool "Auto calibration of the BogoMIPS value"
+ help
+ The BogoMIPS value can easily be derived from the CPU frequency.
+
+config CMDLINE_BOOL
+ bool "Default bootloader kernel arguments"
+
+config CMDLINE
+ string "Initial kernel command string"
+ depends on CMDLINE_BOOL
+ default "console=ttyS0,38400 root=/dev/ram"
+ help
+ On some architectures (EBSA110 and CATS), there is currently no way
+ for the boot loader to pass arguments to the kernel. For these
+ architectures, you should supply some command-line options at build
+ time by entering them here. As a minimum, you should specify the
+ memory size and the root device (e.g., mem=64M root=/dev/nfs).
+
+config USE_OF
+ bool "Flattened Device Tree support"
+ select OF
+ select OF_EARLY_FLATTREE
+ help
+ Include support for flattened device tree machine descriptions.
+
+config BUILTIN_DTB
+ string "DTB to build into the kernel image"
+ depends on OF
+
+config BLK_DEV_SIMDISK
+ tristate "Host file-based simulated block device support"
+ default n
+ depends on XTENSA_PLATFORM_ISS
+ help
+ Create block devices that map to files in the host file system.
+ Device binding to host file may be changed at runtime via proc
+ interface provided the device is not in use.
+
+config BLK_DEV_SIMDISK_COUNT
+ int "Number of host file-based simulated block devices"
+ range 1 10
+ depends on BLK_DEV_SIMDISK
+ default 2
+ help
+ This is the default minimal number of created block devices.
+ Kernel/module parameter 'simdisk_count' may be used to change this
+ value at runtime. More file names (but no more than 10) may be
+ specified as parameters, simdisk_count grows accordingly.
+
+config SIMDISK0_FILENAME
+ string "Host filename for the first simulated device"
+ depends on BLK_DEV_SIMDISK = y
+ default ""
+ help
+ Attach a first simdisk to a host file. Conventionally, this file
+ contains a root file system.
+
+config SIMDISK1_FILENAME
+ string "Host filename for the second simulated device"
+ depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1
+ default ""
+ help
+ Another simulated disk in a host file for a buildroot-independent
+ storage.
+
+source "mm/Kconfig"
+
+source "drivers/pcmcia/Kconfig"
+
+source "drivers/pci/hotplug/Kconfig"
+
+endmenu
+
+menu "Executable file formats"
+
+source "fs/Kconfig.binfmt"
+
+endmenu
+
+source "net/Kconfig"
+
+source "drivers/Kconfig"
+
+source "fs/Kconfig"
+
+source "arch/xtensa/Kconfig.debug"
+
+source "security/Kconfig"
+
+source "crypto/Kconfig"
+
+source "lib/Kconfig"
+
+