config METAG
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def_bool y
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select EMBEDDED
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select GENERIC_ATOMIC64
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select GENERIC_CLOCKEVENTS
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select GENERIC_IRQ_SHOW
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select GENERIC_SMP_IDLE_THREAD
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select HAVE_64BIT_ALIGNED_ACCESS
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select HAVE_ARCH_TRACEHOOK
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select HAVE_C_RECORDMCOUNT
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select HAVE_DEBUG_KMEMLEAK
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select HAVE_DEBUG_STACKOVERFLOW
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select HAVE_DYNAMIC_FTRACE
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select HAVE_EXIT_THREAD
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select HAVE_FTRACE_MCOUNT_RECORD
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select HAVE_FUNCTION_TRACER
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select HAVE_KERNEL_BZIP2
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select HAVE_KERNEL_GZIP
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select HAVE_KERNEL_LZO
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select HAVE_KERNEL_XZ
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select HAVE_MEMBLOCK
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select HAVE_MEMBLOCK_NODE_MAP
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select HAVE_MOD_ARCH_SPECIFIC
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select HAVE_OPROFILE
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select HAVE_PERF_EVENTS
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select HAVE_SYSCALL_TRACEPOINTS
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select HAVE_UNDERSCORE_SYMBOL_PREFIX
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select IRQ_DOMAIN
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select MODULES_USE_ELF_RELA
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select OF
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select OF_EARLY_FLATTREE
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select SPARSE_IRQ
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select CPU_NO_EFFICIENT_FFS
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config STACKTRACE_SUPPORT
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def_bool y
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config LOCKDEP_SUPPORT
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def_bool y
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config RWSEM_GENERIC_SPINLOCK
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def_bool y
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config RWSEM_XCHGADD_ALGORITHM
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bool
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config GENERIC_HWEIGHT
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def_bool y
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config GENERIC_CALIBRATE_DELAY
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def_bool y
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config NO_IOPORT_MAP
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def_bool y
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source "init/Kconfig"
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source "kernel/Kconfig.freezer"
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menu "Processor type and features"
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config MMU
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def_bool y
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config STACK_GROWSUP
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def_bool y
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config HOTPLUG_CPU
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bool "Enable CPU hotplug support"
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depends on SMP
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help
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Say Y here to allow turning CPUs off and on. CPUs can be
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controlled through /sys/devices/system/cpu.
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Say N if you want to disable CPU hotplug.
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config HIGHMEM
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bool "High Memory Support"
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help
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The address space of Meta processors is only 4 Gigabytes large
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and it has to accommodate user address space, kernel address
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space as well as some memory mapped IO. That means that, if you
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have a large amount of physical memory and/or IO, not all of the
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memory can be "permanently mapped" by the kernel. The physical
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memory that is not permanently mapped is called "high memory".
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Depending on the selected kernel/user memory split, minimum
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vmalloc space and actual amount of RAM, you may not need this
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option which should result in a slightly faster kernel.
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If unsure, say n.
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source "arch/metag/mm/Kconfig"
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source "arch/metag/Kconfig.soc"
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config METAG_META12
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bool
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help
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Select this from the SoC config symbol to indicate that it contains a
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Meta 1.2 core.
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config METAG_META21
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bool
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help
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Select this from the SoC config symbol to indicate that it contains a
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Meta 2.1 core.
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config SMP
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bool "Symmetric multi-processing support"
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depends on METAG_META21 && METAG_META21_MMU
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help
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This enables support for systems with more than one thread running
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Linux. If you have a system with only one thread running Linux,
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say N. Otherwise, say Y.
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config NR_CPUS
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int "Maximum number of CPUs (2-4)" if SMP
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range 2 4 if SMP
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default "1" if !SMP
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default "4" if SMP
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config METAG_SMP_WRITE_REORDERING
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bool
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help
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This attempts to prevent cache-memory incoherence due to external
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reordering of writes from different hardware threads when SMP is
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enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an
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attempt to catch some of the cases, and also before writes to shared
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memory in LOCK1 protected atomics and spinlocks.
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This will not completely prevent cache incoherency on affected cores.
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config METAG_LNKGET_AROUND_CACHE
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bool
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depends on METAG_META21
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help
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This indicates that the LNKGET/LNKSET instructions go around the
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cache, which requires some extra cache flushes when the memory needs
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to be accessed by normal GET/SET instructions too.
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choice
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prompt "Atomicity primitive"
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default METAG_ATOMICITY_LNKGET
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help
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This option selects the mechanism for performing atomic operations.
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config METAG_ATOMICITY_IRQSOFF
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depends on !SMP
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bool "irqsoff"
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help
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This option disables interrupts to achieve atomicity. This mechanism
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is not SMP-safe.
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config METAG_ATOMICITY_LNKGET
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depends on METAG_META21
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bool "lnkget/lnkset"
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help
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This option uses the LNKGET and LNKSET instructions to achieve
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atomicity. LNKGET/LNKSET are load-link/store-conditional instructions.
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Choose this option if your system requires low latency.
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config METAG_ATOMICITY_LOCK1
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depends on SMP
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bool "lock1"
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help
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This option uses the LOCK1 instruction for atomicity. This is mainly
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provided as a debugging aid if the lnkget/lnkset atomicity primitive
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isn't working properly.
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endchoice
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config METAG_FPU
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bool "FPU Support"
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depends on METAG_META21
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default y
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help
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This option allows processes to use FPU hardware available with this
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CPU. If this option is not enabled FPU registers will not be saved
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and restored on context-switch.
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If you plan on running programs which are compiled to use hard floats
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say Y here.
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config METAG_DSP
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bool "DSP Support"
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help
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This option allows processes to use DSP hardware available
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with this CPU. If this option is not enabled DSP registers
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will not be saved and restored on context-switch.
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If you plan on running DSP programs say Y here.
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config METAG_PERFCOUNTER_IRQS
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bool "PerfCounters interrupt support"
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depends on METAG_META21
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help
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This option enables using interrupts to collect information from
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Performance Counters. This option is supported in new META21
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(starting from HTP265).
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When disabled, Performance Counters information will be collected
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based on Timer Interrupt.
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config HW_PERF_EVENTS
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def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS
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config METAG_DA
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bool "DA support"
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help
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Say Y if you plan to use a DA debug adapter with Linux. The presence
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of the DA will be detected automatically at boot, so it is safe to say
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Y to this option even when booting without a DA.
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This enables support for services provided by DA JTAG debug adapters,
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such as:
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- communication over DA channels (such as the console driver).
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- use of the DA filesystem.
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menu "Boot options"
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config METAG_BUILTIN_DTB
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bool "Embed DTB in kernel image"
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default y
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help
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Embeds a device tree binary in the kernel image.
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config METAG_BUILTIN_DTB_NAME
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string "Built in DTB"
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depends on METAG_BUILTIN_DTB
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help
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Set the name of the DTB to embed (leave blank to pick one
|
automatically based on kernel configuration).
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config CMDLINE_BOOL
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bool "Default bootloader kernel arguments"
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config CMDLINE
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string "Kernel command line"
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depends on CMDLINE_BOOL
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help
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On some architectures there is currently no way for the boot loader
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to pass arguments to the kernel. For these architectures, you should
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supply some command-line options at build time by entering them
|
here.
|
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config CMDLINE_FORCE
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bool "Force default kernel command string"
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depends on CMDLINE_BOOL
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help
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Set this to have arguments from the default kernel command string
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override those passed by the boot loader.
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endmenu
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source "kernel/Kconfig.preempt"
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source kernel/Kconfig.hz
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endmenu
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menu "Power management options"
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source kernel/power/Kconfig
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endmenu
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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 "net/Kconfig"
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source "drivers/Kconfig"
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source "fs/Kconfig"
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source "arch/metag/Kconfig.debug"
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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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