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Diffstat (limited to 'arch/xtensa/Kconfig')
| -rw-r--r-- | arch/xtensa/Kconfig | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig new file mode 100644 index 00000000..8a3f8351 --- /dev/null +++ b/arch/xtensa/Kconfig @@ -0,0 +1,250 @@ +config FRAME_POINTER + def_bool n + +config ZONE_DMA + def_bool y + +config XTENSA + def_bool y + select HAVE_IDE + select HAVE_GENERIC_HARDIRQS + select GENERIC_IRQ_SHOW + select GENERIC_CPU_DEVICES + 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://xtensa.sourceforge.net/>. + +config RWSEM_XCHGADD_ALGORITHM + def_bool y + +config GENERIC_HWEIGHT + def_bool y + +config GENERIC_GPIO + def_bool y + +config ARCH_HAS_ILOG2_U32 + def_bool n + +config ARCH_HAS_ILOG2_U64 + def_bool n + +config NO_IOPORT + def_bool y + +config HZ + int + default 100 + +source "init/Kconfig" +source "kernel/Kconfig.freezer" + +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_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? + +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" + 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 + +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). + +source "mm/Kconfig" + +config HOTPLUG + bool "Support for hot-pluggable devices" + help + Say Y here if you want to plug devices into your computer while + the system is running, and be able to use them quickly. In many + cases, the devices can likewise be unplugged at any time too. + + One well known example of this is PCMCIA- or PC-cards, credit-card + size devices such as network cards, modems or hard drives which are + plugged into slots found on all modern laptop computers. Another + example, used on modern desktops as well as laptops, is USB. + + Enable HOTPLUG and build a modular kernel. Get agent software + (from <http://linux-hotplug.sourceforge.net/>) and install it. + Then your kernel will automatically call out to a user mode "policy + agent" (/sbin/hotplug) to load modules and set up software needed + to use devices as you hotplug them. + +source "drivers/pcmcia/Kconfig" + +source "drivers/pci/hotplug/Kconfig" + +endmenu + +menu "Executable file formats" + +# only elf supported +config KCORE_ELF + def_bool y + depends on PROC_FS + help + If you enabled support for /proc file system then the file + /proc/kcore will contain the kernel core image in ELF format. This + can be used in gdb: + + $ cd /usr/src/linux ; gdb vmlinux /proc/kcore + + This is especially useful if you have compiled the kernel with the + "-g" option to preserve debugging information. It is mainly used + for examining kernel data structures on the live kernel. + +source "fs/Kconfig.binfmt" + +endmenu + +source "net/Kconfig" + +source "drivers/Kconfig" + +source "fs/Kconfig" + +menu "Xtensa initrd options" + depends on BLK_DEV_INITRD + +config EMBEDDED_RAMDISK + bool "Embed root filesystem ramdisk into the kernel" + +config EMBEDDED_RAMDISK_IMAGE + string "Filename of gzipped ramdisk image" + depends on EMBEDDED_RAMDISK + default "ramdisk.gz" + help + This is the filename of the ramdisk image to be built into the + kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/. + The ramdisk image is not part of the kernel distribution; you must + provide one yourself. +endmenu + +source "arch/xtensa/Kconfig.debug" + +source "security/Kconfig" + +source "crypto/Kconfig" + +source "lib/Kconfig" + + |