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#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#
# vineetg: Oct 4th 2007 : Added Config Options for 800/SMP
#
mainmenu "Linux Kernel Configuration"
# CONFIG common to all ARC cores (700+800) under this
# config option instead of existing ARCH_ARC700
# Need corresponding change in include/asm-arc/linkage.h
config ARCH_ARC
bool
default y
select HAVE_OPROFILE
select NO_IOPORT
select HAVE_KPROBES
select HAVE_KRETPROBES
# vineetg: Mar 31st 2010
# hack: to enable oprofile w/o TRACE_IRQFLAGS
# Normally this is selected automatically by build system
# But is dependent on IRQTRACING when don't have yet.
# So for now we force it: When IRQTRACING implemented, take it off
select TRACING_SUPPORT
config RWSEM_GENERIC_SPINLOCK
def_bool y
config UID16
bool
default y
# This definition is temporarily lying here
config SPLIT_PTLOCK_CPUS
int
default 4096
config FLATMEM
bool
default y
# Reminder: We need to restructure the menuconfig
# and get lots of options in.
config LOG_BUF_SHIFT
int
default 14
# Sameer: Hardcoding this variable as y for a while
# This is the variable to be used to to switch
# between linux and uclinux
config MMU
bool
default y
config NO_IOPORT
bool
default y
config GENERIC_CALIBRATE_DELAY
bool
default y
config GENERIC_TIME
bool
default y
config GENERIC_GPIO
bool
default y
config GENERIC_FIND_FIRST_BIT
bool
default y
config GENERIC_FIND_NEXT_BIT
bool
default y
config GENERIC_HWEIGHT
bool
default y
config BINFMT_ELF
bool
default y
config STACKTRACE_SUPPORT
def_bool y
select STACKTRACE
config SCHED_OMIT_FRAME_POINTER
bool
default y
config HAVE_LATENCYTOP_SUPPORT
bool
default y
# CONFIG common to all ARC cores (700+800) under this
# config option instead of existing ARCH_ARC700
# Need corresponding change in include/asm-arc/linkage.h
config ARCH_ARC
bool
default y
select HAVE_OPROFILE
select NO_IOPORT
# end of temporary definitions section
config VMALLOC_SIZE
int
default "256" #"VMALLOC_SIZE(in MB)"
source "init/Kconfig"
source "kernel/Kconfig.freezer"
menu "Processor Type and features"
choice
prompt "ARC Processor"
default ARCH_ARC700
config ARCH_ARC700
bool "ARC700"
help
Support for ARC700 core processors.
config ARCH_ARC800
bool "ARC800"
help
Support for ARC800 core processors.
endchoice
config SMP
bool "Symmetric Multi-Processing (Incomplete)"
default y
depends on ARCH_ARC800
help
This enables support for systems with more than one CPU. If you have
a system with only one CPU, like most personal computers, say N. If
you have a system with more than one CPU, say Y.
If you say N here, the kernel will run on single and multiprocessor
machines, but will use only one CPU of a multiprocessor machine. If
you say Y here, the kernel will run on many, but not all, single
processor machines. On a single processor machine, the kernel will
run faster if you say N here.
See also the <file:Documentation/smp.txt>,
<file:Documentation/i386/IO-APIC.txt>,
<file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
<http://www.linuxdoc.org/docs.html#howto>.
If you don't know what to do here, say N.
config NR_CPUS
int "Maximum number of CPUs (2-32)"
range 2 32
depends on SMP
default "2"
menu "ARC CPU Core Configuration"
menuconfig ARC700_CACHE
bool "Enable Cache Support"
default y
config ARC700_USE_ICACHE
bool "Use Instruction Cache"
default y
depends on ARC700_CACHE
config ARC700_USE_DCACHE
bool "Use Data Cache"
default y
depends on ARC700_CACHE
config ARC700_CACHE_PAGES
bool "Per Page Cache Control"
# default y if ARC700_USE_ICACHE || ARC700_USE_DCACHE
depends on ARC700_CACHE && (ARC700_USE_ICACHE || ARC700_USE_DCACHE)
help
This can be used to over-ride the global I/D Cache Enable on a
per-page basis (but only for pages accessed via MMU such as
Kernel Virtual address or User Virtual Address)
TLB entries have a per-page Cache Enable Bit.
Note that Global I/D ENABLE + Per Page DISABLE works but corollary
Global DISABLE + Per Page ENABLE won't work
config ARCH_ARC_ICCM
bool "Use ICCM"
help
Single Cycle RAMS to store Fast Path Code
default n
config ARCH_ARC_DCCM
bool "Use DCCM"
help
Single Cycle RAMS to store Fast Path Data
default n
choice
prompt "ARC700 MMU Version"
default ARC_MMU_V3 if ARC700_V_4_10
default ARC_MMU_V2 if !ARC700_V_4_10
config ARC_MMU_V1
bool "MMU v1"
help
Orig ARC700 MMU
config ARC_MMU_V2
bool "MMU v2"
help
Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
when 2 D-TLB and 1 I-TLB entries index into same 2way set.
config ARC_MMU_V3
bool "MMU v3"
# enable this later on, otherwise we are bound to use news insn with v3
# depends on ARC700_V_4_10
help
Introduced with ARC700 4.10: New Features
Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
Shared Address Spaces (SASID)
endchoice
config ARC_MMU_SASID
bool "shared TLB entries for library code segments"
default y
depends on ARC_MMU_V3
select MMAP_CODE_CMN_VADDR
help
Enable MMU support for code TLB entries, sharable across processes.
So instead of a per-process TLB entry per page of library code, a
single TLB entry is used across all proceeses, mapping this lib.
This is difft from glabal TLB entries as it is subscription based
This will reduce pressure on TLB immensely.
choice
prompt "MMU Page Size"
default ARC_PAGE_SIZE_8K
config ARC_PAGE_SIZE_8K
bool "8KB"
help
Choose between 8k vs 16k
config ARC_PAGE_SIZE_16K
bool "16KB"
depends on ARC_MMU_V3
config ARC_PAGE_SIZE_4K
bool "4KB"
depends on ARC_MMU_V3
endchoice
config ARCH_ARC_LV2_INTR
bool "Enable two levels of Interrupts high(2)low(1)"
default n
select TIMER_LV2
config ARCH_ARC_FPU
bool "Enable FPU state persistence across context switch"
default N
help
Double Precision Floating Point unit had dedictaed regs which
need to be saved/restored across context-switch.
Note that ARC FPU is overly simplistic, unlike say x86, which has
hardware pieces to allow software to conditionally save/restore,
based on actual usage of FPU by a task. Thus our implemn does
this for all tasks in system.
menuconfig ARC700_V_4_10
bool "Build kernel for ARC700 v 4.10 - Summer 2011"
default n
help
This rel of ARC700 provides a bunch of new feature:
-MMU-v3: Variable Pg Sz, bigger J-TLB, Shared Address Spaces
-Caches: New Prog Model, Region Flush
-Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
config ARC_HAS_LLSC
bool "llock/scond insns for faster atomic ops"
default y
depends on ARC700_V_4_10
config ARC_HAS_SWAPE
bool "single cycle endian-swap insn"
default y
depends on ARC700_V_4_10
config ARC_HAS_RTSC
bool "64-bit read-only time-stamp counter"
default y
depends on ARC700_V_4_10
endmenu #CPU Core config
menu "Board Configuration"
config LINUX_LINK_BASE
hex "Linux Link Address"
default "0x80000000"
help
ARC700 divides the 32 bit phy address space into two equal halves
-Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
-Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
Typically Linux kernel is linked at the start of untransalted addr,
hence the default value of 0x8zs.
However some customers have peripherals mapped at this addr, so
Linux needs to be scooted a bit.
If you don't know what the above means, leave this setting alone.
config SDRAM_SIZE
hex "SD RAM Size"
default "0x10000000"
help
Implies the amount of SDRAM/DRAM Linux is going to claim/own.
The actual memory itself could be larger than this number. But for
all software purposes, this is the amt of memory.
endmenu #Board config
menu "ARC Pheripheral Support"
config ARC_AHB_PCI_BRIDGE
bool "Host PCI Bridge on AA4 Board"
default n
depends on PCI
help
To Enable a PCI device to work on AA4 Ref Board a AHB to PCI Host Bridge
is needed.
config NO_DMA
bool
default n
config ARC_IDE
tristate "Enable ARC IDE"
select HAVE_IDE
select IDE
select BLK_DEV_IDE
select BLK_DEV_IDEDISK
default y
config ARC_BLK_DEV_IDEDMA
bool "ARC IDE DMA support"
default y
select BLK_DEV_IDEDMA
depends on ARC_IDE
config ARC_SERIAL
bool "ARC UART driver support"
select SERIAL_CORE
default y
config ARC_SERIAL_NR_PORTS
int 'Number of ports'
range 1 3
default 1
depends on ARC_SERIAL
config ARC_SERIAL_BAUD
int "Baud rate"
default "115200"
depends on ARC_SERIAL
config ARC_SERIAL_CONSOLE
bool
select SERIAL_CORE_CONSOLE
depends on !ARC_PGU_CONSOLE && ARC_SERIAL
default y
config SERIAL_LV2
bool "Configure serial interrupt on level 2"
default n
depends on ARC_SERIAL && TIMER_LV2
config TIMER_LV2
bool "Configure Timer0 interrupt on level 2"
default n
depends on ARCH_ARC_LV2_INTR
config ARC_PS2
bool "ARC PS/2 support"
default n
depends on SERIO
help
ARC FPGA Peripherals PS/2 support. Driver currently works only
on AA4 board.
config ARC_PS2_DEBUG
bool "ARC PS/2 driver debugging"
default n
depends on ARC_PS2
help
Turn on statistic collection and various debug messages to
simplify debugging.
config ARCTANGENT_EMAC
tristate "ARCTangent EMAC support"
select NET
select INET
select NETDEVICES
select NET_ETHERNET
default n
config EMAC_LV2
bool "Configure EMAC interrupt on level 2"
default n
depends on ARCTANGENT_EMAC && TIMER_LV2
config EMAC_NAPI
bool "Use NAPI ?"
default n
depends on ARCTANGENT_EMAC
config XILINX_TEMAC
tristate "Use AA5 Xilinx TEMAC ?"
default n
select NET
select INET
select NETDEVICES
select NET_ETHERNET
config ISS_MAC
tristate "Use xISS/ISS ENET simulation ?"
default n
select NET
select IET
select NETDEVICES
select NET_ETHERNET
config ARCPGU
tristate "Use ARC Pixel Graphics Unit"
select FB
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
config VFB_SIM
bool "Use ISS/xISS framebuffer"
select FB
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select FB_SYS_FOPS
config VFB_SIM_BASE
hex "Base address of Frame Buffer in Pysical memory"
default "0x88000000"
depends on VFB_SIM
config VFB_SIM_SIZE
hex "Size of memory buffer"
default "0x400000"
depends on VFB_SIM
config VFB_SIM_XRES
int "X-Resolution"
default "640"
depends on VFB_SIM
config VFB_SIM_YRES
int "Y-Resolution"
default "480"
depends on VFB_SIM
config VFB_SIM_BPP
int "Bits per pixel"
default "16"
depends on VFB_SIM
config FORCE_MAX_ZONEORDER
int
depends on ARCPGU || PGU_SIM
default "13"
config ARCPGU_YUVBUFS
int 'Number of YUV Buffers'
default 18
depends on ARCPGU || PGU_SIM
config ARCPGU_RGBBUFS
int 'Number of RGB Buffers'
default 2
depends on ARCPGU || PGU_SIM
config ARCPGU_DISPTYPE
int 'Display selector (0 - VGA, 1 - QVGA)'
default 0
depends on ARCPGU || PGU_SIM
config ARCPGU_XRES
int 'Default YUV X resolution'
default 640
depends on ARCPGU || PGU_SIM
config ARCPGU_YRES
int 'Default YUV Y resolution'
default 480
depends on ARCPGU || PGU_SIM
config ARCPGU_VCLK
bool 'PLL-driven pixel clock'
default 0
depends on ARCPGU || PGU_SIM
config ARC_PGU_CONSOLE
bool 'Console on the ARC PGU'
depends on ARCPGU || PGU_SIM
select FRAMEBUFFER_CONSOLE
select FONTS
select FONT_8x8
select FONT_8x16
select LOGO
select LOGO_LINUX_MONO
select LOGO_LINUX_VGA16
select LOGO_LINUX_CLUT224
select BACKLIGHT_LCD_SUPPORT
config ARCVSYNC
bool
depends on ARC_PGU_CONSOLE
default y
config SOUND_ARC_AC97
tristate "Enable AC97 interface"
select SOUND
select SOUND_PRIME
config ARC_7XX_GPIO
bool "ARC 7XX GPIO support"
select ARCH_REQUIRE_GPIOLIB
select GENERIC_GPIO
default y
help
Say Y here if you're going to use arc gpio.
menu "Bus options (PCI etc.)"
config PCI
bool "PCI support"
default n
help
If you have PCI, say Y, otherwise N.
source "drivers/pci/Kconfig"
source "drivers/pci/hotplug/Kconfig"
source "drivers/pcmcia/Kconfig"
endmenu # Bus options
endmenu # Peripherals
config ARCH_ARC_CURR_IN_REG
bool "Dedicate Register r25 for current_task pointer"
default N
help
This reserved Register R25 to point to Current Task in
kernel mode. This saves memory access for each such access
config ARC_TLS_REG_EMUL
bool "Emulate a TLS register using a dedicated user vaddr"
default N
help
ARC ABI lacks defining a dedicated TLS register to hold
pointer to TLS Data area.
So we emulate the TLS register using a TLS Virtual addr
config ARC_MISALIGNED_ACCESS
bool "Support unaligned memory access"
default N
help
This enables misaligned 16 & 32 bit memory access exception handler
to recover from misaligned memory access in both user and kernel space.
config ARCH_ARC_SPACE_RND
bool "Address Space Randomisation (mmap/SP)"
default N
help
This feature enables Address space randomisation for mmap and SP
Note that it could lead to some performance degradation especially
for shared libraries so use it only if needed
config MMAP_CODE_CMN_VADDR
bool "mmap shared lib code at same vaddr across proceses"
default y
select GENERIC_ALLOCATOR
help
This feature forces kernel to map a particular shared lib's code
at same vaddr across processes using a dedicated
mmap-shared-code-virtual-address-space. Any lib's code page frames
are already shared using page-cache; same vaddr ensures a single
v:p mapping, preventing virtual aliases in ARC VIPT I-Caches.
This boosts performance because each alias occupies a cache-line
of own hence needs to be fetched per instance as opposed to just
once.
It is _must_ for enabling hardware SASID feature, where a single
shared TLB entry for shared code can be used across processes.
config HZ
int "Timer Frequency"
default 100
config GENERIC_CLOCKEVENTS
bool "Generic clock events"
default y
config ARC_STACK_NONEXEC
bool "Make stack non-executable"
default n
help
By default the stack and heap areas of processes have execute permissions switched on.
You may choose to disable execute on the default data permissions switching this option on
see include/asm/page.h
source "kernel/time/Kconfig"
config ARCH_ARC_HLINK
bool "Support for Metaware debugger assisted Host access"
default n
help
This options allows a Linux userland apps to directly access
host file system (open/creat/read/write etc) with help from
Metaware Debugger. This can come in handy for Linux-host communication
when there is no real usable peripheral such as EMAC.
menuconfig ARC_DBG
bool "ARC debugging"
default y
config ARC_STACK_UNWIND
bool "Enable DWARF specific kernel stack unwind"
depends on ARC_DBG
default y
help
Compiles the kernel with DWARF unwind information and can be used
to get stack backtraces.
If you say Y here the resulting kernel image will be slightly larger
but not slower, and it will give very useful debugging information.
If you don't debug the kernel, you can say N, but we may not be able
to solve problems without frame unwind information
config ARC_TLB_PARANOIA
bool "Paranoia Checks in Low Level TLB Handlers"
depends on ARC_DBG
default n
config ARC_DBG_EVENT_TIMELINE
bool "Low level event capture"
depends on ARC_DBG
default n
help
Capture low level events: IRQ/Trap/Exception
config ARC_TLB_PROFILE
bool "Profile TLB Misses"
default n
select DEBUG_FS
depends on ARC_DBG
help
Counts number of I and D TLB Misses and exports them via Debugfs
The counters can be cleared via Debugfs as well
config ARC_UBOOT_CMDLINE
bool "Support U-boot kernel command line passing"
default n
help
If you are using U-boot (www.denx.de) and wish to pass the kernel
command line from the U-boot environment to the Linux kernel then
switch this option on.
U-boot will pass the command_line variable at the beginning of the
.bss section. The kernel copies this variable into the correct place
during it's boot.
If you are unsure "N" is a good choice.
config ARC_PROFILING
bool "Support ARC Hardware Profiling"
default n
help
If you have the ARC hardware support built into your hardware and
wish to use the "task mode" profiling support then switch this on.
This will enable an architecture specific context switch hook that
will enable / disable the hardware counting while not running the specific
process you are interested in.
If you are unsure "N" is a good choice.
source "kernel/Kconfig.preempt"
endmenu
source "mm/Kconfig"
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
source "arch/arc/Kconfig.debug"
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"
source "../drivers/ruby/Kconfig"
source "../drivers/topaz/Kconfig"