403 lines
9 KiB
Text
403 lines
9 KiB
Text
#
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# For a description of the syntax of this configuration file,
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# see Documentation/kbuild/kconfig-language.txt.
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#
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mainmenu "uClinux/ubicom32 (w/o MMU) Kernel Configuration"
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config UBICOM32
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bool
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select HAVE_OPROFILE
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default y
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config RAMKERNEL
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bool
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default y
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config CPU_BIG_ENDIAN
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bool
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default y
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config FORCE_MAX_ZONEORDER
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int
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default "14"
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config HAVE_CLK
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bool
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default y
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config MMU
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bool
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default n
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config FPU
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bool
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default n
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config ZONE_DMA
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bool
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default y
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config RWSEM_GENERIC_SPINLOCK
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bool
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default y
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config RWSEM_XCHGADD_ALGORITHM
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bool
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default n
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config ARCH_HAS_ILOG2_U32
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bool
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default n
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config ARCH_HAS_ILOG2_U64
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bool
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default n
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config GENERIC_FIND_NEXT_BIT
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bool
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default y
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config GENERIC_GPIO
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bool
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default y
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config GPIOLIB
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bool
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default y
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config GENERIC_HWEIGHT
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bool
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default y
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config GENERIC_HARDIRQS
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bool
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default y
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config STACKTRACE_SUPPORT
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bool
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default y
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config LOCKDEP_SUPPORT
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bool
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default y
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config GENERIC_CALIBRATE_DELAY
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bool
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default y
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config GENERIC_TIME
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bool
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default y
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config TIME_LOW_RES
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bool
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default y
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config GENERIC_CLOCKEVENTS
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bool
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default y
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config GENERIC_CLOCKEVENTS_BROADCAST
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bool
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depends on GENERIC_CLOCKEVENTS
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default y if SMP && !LOCAL_TIMERS
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config NO_IOPORT
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def_bool y
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config ARCH_SUPPORTS_AOUT
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def_bool y
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config IRQ_PER_CPU
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bool
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default y
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config SCHED_NO_NO_OMIT_FRAME_POINTER
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bool
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default y
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config UBICOM32_PLIO
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bool
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default n
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menu "Processor type and features"
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comment "Processor type will be selected by Board"
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config UBICOM32_V3
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bool
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help
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Ubicom IP5xxx series processor support.
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config UBICOM32_V4
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bool
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help
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Ubicom IP7xxx series processor support.
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comment "Board"
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choice
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prompt "Board type"
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help
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Select your board.
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config NOBOARD
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bool "No board selected"
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help
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Default. Don't select any board specific config. Will not build unless you change!
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# Add your boards here
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source "arch/ubicom32/mach-ip5k/Kconfig"
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source "arch/ubicom32/mach-ip7k/Kconfig"
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endchoice
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comment "Kernel Options"
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config SMP
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bool "Symmetric multi-processing support"
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select USE_GENERIC_SMP_HELPERS
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default n
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help
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Enables multithreading support. Enabling SMP support increases
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the size of system data structures. SMP support can have either
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positive or negative impact on performance depending on workloads.
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If you do not know what to do here, say N.
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config OLD_40400010_SYSTEM_CALL
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bool "Provide old system call interface at 0x40400010"
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default y
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help
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Provides the old system call interface, does not affect the
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new system_call interface.
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config NR_CPUS
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int "Number of configured CPUs"
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range 2 32
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default 2
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depends on SMP
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help
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Upper bound on the number of CPUs. Space is reserved
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at compile time for this many CPUs.
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config LOCAL_TIMERS
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bool "Use local timer interrupts"
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depends on SMP
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default y
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help
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Enable support for local timers on SMP platforms, rather then the
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legacy IPI broadcast method. Local timers allows the system
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accounting to be spread across the timer interval, preventing a
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"thundering herd" at every timer tick. A physical timer is allocated
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per cpu.
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config TIMER_EXTRA_ALLOC
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int "Number of additional physical timer events to create"
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depends on GENERIC_CLOCKEVENTS
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default 0
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help
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The Ubicom32 processor has a number of event timers that can be wrapped
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in Linux clock event structures (assuming that the timers are not being
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used for another purpose). Based on the value of LOCAL_TIMERS, either
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2 timers will be used or a timer will be used for every CPU. This value
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allows the programmer to select additional timers over that amount.
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config IRQSTACKS
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bool "Create separate stacks for interrupt handling"
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default n
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help
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Selecting this causes interrupts to be created on a separate
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stack instead of nesting the interrupts on the kernel stack.
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config IRQSTACKS_USEOCM
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bool "Use OCM for interrupt stacks"
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default n
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depends on IRQSTACKS
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help
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Selecting this cause the interrupt stacks to be placed in OCM
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reducing cache misses at the expense of using the OCM for servicing
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interrupts.
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menu "OCM Instruction Heap"
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config OCM_MODULES_RESERVATION
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int "OCM Instruction heap reservation. 0-192 kB"
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range 0 192
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default "0"
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help
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The minimum amount of OCM memory to reserve for kernel loadable module
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code. If you are not using this memory it cannot be used for anything
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else. Leave it as 0 if you have prebuilt modules that are compiled with
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OCM support.
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config OCM_MODULES_MAY_CONSUME_REMAINING_CODESPACE
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bool "Give all unused ocm code space to the ocm instruction heap."
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default n
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help
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Allow the OCM instruction heap allocation to consume any remaining
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unused OCM code space. The result of this is that you will not have
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and deterministic results, but you will not have any waste either.
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config OCM_MODULES_FALLBACK_TO_DDR
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bool "Loadable Modules requiring OCM may fallback to use DDR."
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default n
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help
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If a module cannot get the OCM code it requires allow DDR to
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be used instead.
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endmenu
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config HZ
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int "Frequency of 'jiffies' (for polling)"
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default 1000
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help
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100 is common for embedded systems, but 1000 allows
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you to do more drivers without actually having
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interrupts working properly.
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comment "RAM configuration"
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config MIN_RAMSIZE
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hex "Minimum Size of RAM (in bytes)"
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range 0x01000000 0x08000000
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default "0x02000000"
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help
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Define the minimum acceptable size of the system
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RAM. Must be at least 16MB (0x01000000)
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comment "Build options"
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config LINKER_RELAXATION
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bool "Linker Relaxation"
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default y
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help
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Turns on linker relaxation that will produce smaller
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faster code. Increases link time.
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comment "Driver options"
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menu "PCI Bus"
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config PCI
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bool "PCI bus"
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default true
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help
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Enable/Disable PCI bus
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source "drivers/pci/Kconfig"
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config PCI_DEV0_IDSEL
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hex "slot 0 address"
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depends on PCI
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default "0x01000000"
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help
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Slot 0 address. This address should correspond to the address line
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which the IDSEL bit for this slot is connected to.
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config PCI_DEV1_IDSEL
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hex "slot 1 address"
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depends on PCI
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default "0x02000000"
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help
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Slot 1 address. This address should correspond to the address line
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which the IDSEL bit for this slot is connected to.
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endmenu
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# End PCI
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menu "Input devices"
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config UBICOM_INPUT
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bool "Ubicom polled GPIO input driver"
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select INPUT
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select INPUT_POLLDEV
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help
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Polling input driver, much like the GPIO input driver, except that it doesn't
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rely on interrupts. It will report events via the input subsystem.
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default n
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config UBICOM_INPUT_I2C
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bool "Ubicom polled GPIO input driver over I2C"
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select INPUT
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select INPUT_POLLDEV
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help
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Polling input driver, much like the PCA953x driver, it can support a variety of
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different I2C I/O expanders. This device polls the I2C I/O expander for events
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and reports them via the input subsystem.
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default n
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endmenu
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# Input devices
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source "arch/ubicom32/mach-common/Kconfig.switch"
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menu "Misc devices"
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config UBICOM_HID
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bool "Ubicom HID driver"
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select INPUT
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select INPUT_POLLDEV
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select LCD_CLASS_DEVICE
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help
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Driver for HID chip found on some Ubicom reference designs. This chip handles
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PWM, button input, and IR remote control. It registers as an input device and
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a backlight device.
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default n
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endmenu
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# Misc devices
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config CMDLINE_BOOL
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bool "Built-in kernel command line"
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default n
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help
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Allow for specifying boot arguments to the kernel at
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build time. On some systems (e.g. embedded ones), it is
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necessary or convenient to provide some or all of the
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kernel boot arguments with the kernel itself (that is,
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to not rely on the boot loader to provide them.)
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To compile command line arguments into the kernel,
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set this option to 'Y', then fill in the
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the boot arguments in CONFIG_CMDLINE.
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Systems with fully functional boot loaders (i.e. non-embedded)
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should leave this option set to 'N'.
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config CMDLINE
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string "Built-in kernel command string"
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depends on CMDLINE_BOOL
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default ""
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help
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Enter arguments here that should be compiled into the kernel
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image and used at boot time. If the boot loader provides a
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command line at boot time, it is appended to this string to
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form the full kernel command line, when the system boots.
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However, you can use the CONFIG_CMDLINE_OVERRIDE option to
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change this behavior.
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In most cases, the command line (whether built-in or provided
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by the boot loader) should specify the device for the root
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file system.
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config CMDLINE_OVERRIDE
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bool "Built-in command line overrides boot loader arguments"
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default n
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depends on CMDLINE_BOOL
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help
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Set this option to 'Y' to have the kernel ignore the boot loader
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command line, and use ONLY the built-in command line.
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This is used to work around broken boot loaders. This should
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be set to 'N' under normal conditions.
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endmenu
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# End Processor type and features
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source "arch/ubicom32/Kconfig.debug"
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menu "Executable file formats"
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source "fs/Kconfig.binfmt"
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endmenu
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source "init/Kconfig"
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source "kernel/Kconfig.preempt"
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source "kernel/time/Kconfig"
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source "mm/Kconfig"
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source "net/Kconfig"
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source "drivers/Kconfig"
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source "fs/Kconfig"
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source "security/Kconfig"
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source "crypto/Kconfig"
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source "lib/Kconfig"
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