config METAG

def_bool y

select EMBEDDED

select GENERIC_ATOMIC64

select GENERIC_CLOCKEVENTS

select GENERIC_IRQ_SHOW

select GENERIC_SMP_IDLE_THREAD

select HAVE_64BIT_ALIGNED_ACCESS

select HAVE_ARCH_TRACEHOOK

select HAVE_C_RECORDMCOUNT

select HAVE_DEBUG_KMEMLEAK

select HAVE_DYNAMIC_FTRACE

select HAVE_FTRACE_MCOUNT_RECORD

select HAVE_FUNCTION_TRACER

select HAVE_FUNCTION_TRACE_MCOUNT_TEST

select HAVE_GENERIC_HARDIRQS

select HAVE_KERNEL_BZIP2

select HAVE_KERNEL_GZIP

select HAVE_KERNEL_LZO

select HAVE_KERNEL_XZ

select HAVE_MEMBLOCK

select HAVE_MEMBLOCK_NODE_MAP

select HAVE_MOD_ARCH_SPECIFIC

select HAVE_OPROFILE

select HAVE_PERF_EVENTS

select HAVE_SYSCALL_TRACEPOINTS

select HAVE_UNDERSCORE_SYMBOL_PREFIX

select IRQ_DOMAIN

select MODULES_USE_ELF_RELA

select OF

select OF_EARLY_FLATTREE

select SPARSE_IRQ

select HAVE_DEBUG_STACKOVERFLOW

config STACKTRACE_SUPPORT

def_bool y

config LOCKDEP_SUPPORT

def_bool y

config HAVE_LATENCYTOP_SUPPORT

def_bool y

config RWSEM_GENERIC_SPINLOCK

def_bool y

config RWSEM_XCHGADD_ALGORITHM

bool

config GENERIC_HWEIGHT

def_bool y

config GENERIC_CALIBRATE_DELAY

def_bool y

config NO_IOPORT

def_bool y

source "init/Kconfig"

source "kernel/Kconfig.freezer"

menu "Processor type and features"

config MMU

def_bool y

config STACK_GROWSUP

def_bool y

config HOTPLUG_CPU

bool "Enable CPU hotplug support"

depends on SMP

help

Say Y here to allow turning CPUs off and on. CPUs can be

controlled through /sys/devices/system/cpu.

Say N if you want to disable CPU hotplug.

config HIGHMEM

bool "High Memory Support"

help

The address space of Meta processors is only 4 Gigabytes large

and it has to accommodate user address space, kernel address

space as well as some memory mapped IO. That means that, if you

have a large amount of physical memory and/or IO, not all of the

memory can be "permanently mapped" by the kernel. The physical

memory that is not permanently mapped is called "high memory".

Depending on the selected kernel/user memory split, minimum

vmalloc space and actual amount of RAM, you may not need this

option which should result in a slightly faster kernel.

If unsure, say n.

source "arch/metag/mm/Kconfig"

source "arch/metag/Kconfig.soc"

config METAG_META12

bool

help

Select this from the SoC config symbol to indicate that it contains a

Meta 1.2 core.

config METAG_META21

bool

help

Select this from the SoC config symbol to indicate that it contains a

Meta 2.1 core.

config SMP

bool "Symmetric multi-processing support"

depends on METAG_META21 && METAG_META21_MMU

select USE_GENERIC_SMP_HELPERS

help

This enables support for systems with more than one thread running

Linux. If you have a system with only one thread running Linux,

say N. Otherwise, say Y.

config NR_CPUS

int "Maximum number of CPUs (2-4)" if SMP

range 2 4 if SMP

default "1" if !SMP

default "4" if SMP

config METAG_SMP_WRITE_REORDERING

bool

help

This attempts to prevent cache-memory incoherence due to external

reordering of writes from different hardware threads when SMP is

enabled. It adds fences (system event 0) to smp_mb and smp_rmb in an

attempt to catch some of the cases, and also before writes to shared

memory in LOCK1 protected atomics and spinlocks.

This will not completely prevent cache incoherency on affected cores.

config METAG_LNKGET_AROUND_CACHE

bool

depends on METAG_META21

help

This indicates that the LNKGET/LNKSET instructions go around the

cache, which requires some extra cache flushes when the memory needs

to be accessed by normal GET/SET instructions too.

choice

prompt "Atomicity primitive"

default METAG_ATOMICITY_LNKGET

help

This option selects the mechanism for performing atomic operations.

config METAG_ATOMICITY_IRQSOFF

depends on !SMP

bool "irqsoff"

help

This option disables interrupts to achieve atomicity. This mechanism

is not SMP-safe.

config METAG_ATOMICITY_LNKGET

depends on METAG_META21

bool "lnkget/lnkset"

help

This option uses the LNKGET and LNKSET instructions to achieve

atomicity. LNKGET/LNKSET are load-link/store-conditional instructions.

Choose this option if your system requires low latency.

config METAG_ATOMICITY_LOCK1

depends on SMP

bool "lock1"

help

This option uses the LOCK1 instruction for atomicity. This is mainly

provided as a debugging aid if the lnkget/lnkset atomicity primitive

isn't working properly.

endchoice

config METAG_FPU

bool "FPU Support"

depends on METAG_META21

default y

help

This option allows processes to use FPU hardware available with this

CPU. If this option is not enabled FPU registers will not be saved

and restored on context-switch.

If you plan on running programs which are compiled to use hard floats

say Y here.

config METAG_DSP

bool "DSP Support"

help

This option allows processes to use DSP hardware available

with this CPU. If this option is not enabled DSP registers

will not be saved and restored on context-switch.

If you plan on running DSP programs say Y here.

config METAG_PERFCOUNTER_IRQS

bool "PerfCounters interrupt support"

depends on METAG_META21

help

This option enables using interrupts to collect information from

Performance Counters. This option is supported in new META21

(starting from HTP265).

When disabled, Performance Counters information will be collected

based on Timer Interrupt.

config HW_PERF_EVENTS

def_bool METAG_PERFCOUNTER_IRQS && PERF_EVENTS

config METAG_DA

bool "DA support"

help

Say Y if you plan to use a DA debug adapter with Linux. The presence

of the DA will be detected automatically at boot, so it is safe to say

Y to this option even when booting without a DA.

This enables support for services provided by DA JTAG debug adapters,

such as:

- communication over DA channels (such as the console driver).

- use of the DA filesystem.

menu "Boot options"

config METAG_BUILTIN_DTB

bool "Embed DTB in kernel image"

default y

help

Embeds a device tree binary in the kernel image.

config METAG_BUILTIN_DTB_NAME

string "Built in DTB"

depends on METAG_BUILTIN_DTB

help

Set the name of the DTB to embed (leave blank to pick one

automatically based on kernel configuration).

config CMDLINE_BOOL

bool "Default bootloader kernel arguments"

config CMDLINE

string "Kernel command line"

depends on CMDLINE_BOOL

help

On some architectures 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.

config CMDLINE_FORCE

bool "Force default kernel command string"

depends on CMDLINE_BOOL

help

Set this to have arguments from the default kernel command string

override those passed by the boot loader.

endmenu

source "kernel/Kconfig.preempt"

source kernel/Kconfig.hz

endmenu

menu "Power management options"

source kernel/power/Kconfig

endmenu

menu "Executable file formats"

source "fs/Kconfig.binfmt"

endmenu

source "net/Kconfig"

source "drivers/Kconfig"

source "fs/Kconfig"

source "arch/metag/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"