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linux/arch/blackfin/Kconfig
Bryan Wu 1394f03221 blackfin architecture 
This adds support for the Analog Devices Blackfin processor architecture, and
currently supports the BF533, BF532, BF531, BF537, BF536, BF534, and BF561
(Dual Core) devices, with a variety of development platforms including those
avaliable from Analog Devices (BF533-EZKit, BF533-STAMP, BF537-STAMP,
BF561-EZKIT), and Bluetechnix!  Tinyboards.

The Blackfin architecture was jointly developed by Intel and Analog Devices
Inc.  (ADI) as the Micro Signal Architecture (MSA) core and introduced it in
December of 2000.  Since then ADI has put this core into its Blackfin
processor family of devices.  The Blackfin core has the advantages of a clean,
orthogonal,RISC-like microprocessor instruction set.  It combines a dual-MAC
(Multiply/Accumulate), state-of-the-art signal processing engine and
single-instruction, multiple-data (SIMD) multimedia capabilities into a single
instruction-set architecture.

The Blackfin architecture, including the instruction set, is described by the
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
http://blackfin.uclinux.org/gf/download/frsrelease/29/2549/Blackfin_PRM.pdf

The Blackfin processor is already supported by major releases of gcc, and
there are binary and source rpms/tarballs for many architectures at:
http://blackfin.uclinux.org/gf/project/toolchain/frs There is complete
documentation, including "getting started" guides available at:
http://docs.blackfin.uclinux.org/ which provides links to the sources and
patches you will need in order to set up a cross-compiling environment for
bfin-linux-uclibc

This patch, as well as the other patches (toolchain, distribution,
uClibc) are actively supported by Analog Devices Inc, at:
http://blackfin.uclinux.org/

We have tested this on LTP, and our test plan (including pass/fails) can
be found at:
http://docs.blackfin.uclinux.org/doku.php?id=testing_the_linux_kernel

[m.kozlowski@tuxland.pl: balance parenthesis in blackfin header files]
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Aubrey Li <aubrey.li@analog.com>
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-07 12:12:58 -07:00

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#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#
mainmenu "uClinux/Blackfin (w/o MMU) Kernel Configuration"
config MMU
bool
default n
config FPU
bool
default n
config RWSEM_GENERIC_SPINLOCK
bool
default y
config RWSEM_XCHGADD_ALGORITHM
bool
default n
config BLACKFIN
bool
default y
config BFIN
bool
default y
config SEMAPHORE_SLEEPERS
bool
default y
config GENERIC_FIND_NEXT_BIT
bool
default y
config GENERIC_HWEIGHT
bool
default y
config GENERIC_HARDIRQS
bool
default y
config GENERIC_IRQ_PROBE
bool
default y
config GENERIC_TIME
bool
default n
config GENERIC_CALIBRATE_DELAY
bool
default y
config FORCE_MAX_ZONEORDER
int
default "14"
config GENERIC_CALIBRATE_DELAY
bool
default y
config IRQCHIP_DEMUX_GPIO
bool
default y
source "init/Kconfig"
source "kernel/Kconfig.preempt"
menu "Blackfin Processor Options"
comment "Processor and Board Settings"
choice
prompt "CPU"
default BF533
config BF531
bool "BF531"
help
BF531 Processor Support.
config BF532
bool "BF532"
help
BF532 Processor Support.
config BF533
bool "BF533"
help
BF533 Processor Support.
config BF534
bool "BF534"
help
BF534 Processor Support.
config BF536
bool "BF536"
help
BF536 Processor Support.
config BF537
bool "BF537"
help
BF537 Processor Support.
config BF561
bool "BF561"
help
Not Supported Yet - Work in progress - BF561 Processor Support.
endchoice
choice
prompt "Silicon Rev"
default BF_REV_0_2 if BF537
default BF_REV_0_3 if BF533
config BF_REV_0_2
bool "0.2"
depends on (BF537 || BF536 || BF534)
config BF_REV_0_3
bool "0.3"
depends on (BF561 || BF537 || BF536 || BF534 || BF533 || BF532 || BF531)
config BF_REV_0_4
bool "0.4"
depends on (BF561 || BF533 || BF532 || BF531)
config BF_REV_0_5
bool "0.5"
depends on (BF561 || BF533 || BF532 || BF531)
endchoice
config BFIN_DUAL_CORE
bool
depends on (BF561)
default y
config BFIN_SINGLE_CORE
bool
depends on !BFIN_DUAL_CORE
default y
choice
prompt "System type"
default BFIN533_STAMP
help
Do NOT change the board here. Please use the top level
configuration to ensure that all the other settings are
correct.
config BFIN533_EZKIT
bool "BF533-EZKIT"
depends on (BF533 || BF532 || BF531)
help
BF533-EZKIT-LITE board Support.
config BFIN533_STAMP
bool "BF533-STAMP"
depends on (BF533 || BF532 || BF531)
help
BF533-STAMP board Support.
config BFIN537_STAMP
bool "BF537-STAMP"
depends on (BF537 || BF536 || BF534)
help
BF537-STAMP board Support.
config BFIN533_BLUETECHNIX_CM
bool "Bluetechnix CM-BF533"
depends on (BF533)
help
CM-BF533 support for EVAL- and DEV-Board.
config BFIN537_BLUETECHNIX_CM
bool "Bluetechnix CM-BF537"
depends on (BF537)
help
CM-BF537 support for EVAL- and DEV-Board.
config BFIN561_BLUETECHNIX_CM
bool "BF561-CM"
depends on (BF561)
help
CM-BF561 support for EVAL- and DEV-Board.
config BFIN561_EZKIT
bool "BF561-EZKIT"
depends on (BF561)
help
BF561-EZKIT-LITE board Support.
config PNAV10
bool "PNAV 1.0 board"
depends on (BF537)
help
PNAV 1.0 board Support.
config GENERIC_BOARD
bool "Custom"
depends on (BF537 || BF536 \
|| BF534 || BF561 || BF535 || BF533 || BF532 || BF531)
help
GENERIC or Custom board Support.
endchoice
config MEM_GENERIC_BOARD
bool
depends on GENERIC_BOARD
default y
config MEM_MT48LC64M4A2FB_7E
bool
depends on (BFIN533_STAMP)
default y
config MEM_MT48LC16M16A2TG_75
bool
depends on (BFIN533_EZKIT || BFIN561_EZKIT \
|| BFIN533_BLUETECHNIX_CM || BFIN537_BLUETECHNIX_CM)
default y
config MEM_MT48LC32M8A2_75
bool
depends on (BFIN537_STAMP || PNAV10)
default y
config MEM_MT48LC8M32B2B5_7
bool
depends on (BFIN561_BLUETECHNIX_CM)
default y
config BFIN_SHARED_FLASH_ENET
bool
depends on (BFIN533_STAMP)
default y
source "arch/blackfin/mach-bf533/Kconfig"
source "arch/blackfin/mach-bf561/Kconfig"
source "arch/blackfin/mach-bf537/Kconfig"
menu "Board customizations"
config CMDLINE_BOOL
bool "Default bootloader kernel arguments"
config CMDLINE
string "Initial kernel command string"
depends on CMDLINE_BOOL
default "console=ttyBF0,57600"
help
If you don't have a boot loader capable of passing a command line string
to the kernel, you may specify one here. As a minimum, you should specify
the memory size and the root device (e.g., mem=8M, root=/dev/nfs).
comment "Board Setup"
config CLKIN_HZ
int "Crystal Frequency in Hz"
default "11059200" if BFIN533_STAMP
default "27000000" if BFIN533_EZKIT
default "25000000" if BFIN537_STAMP
default "30000000" if BFIN561_EZKIT
default "24576000" if PNAV10
help
The frequency of CLKIN crystal oscillator on the board in Hz.
config MEM_SIZE
int "SDRAM Memory Size in MBytes"
default 32 if BFIN533_EZKIT
default 64 if BFIN537_STAMP
default 64 if BFIN561_EZKIT
default 128 if BFIN533_STAMP
default 64 if PNAV10
config MEM_ADD_WIDTH
int "SDRAM Memory Address Width"
default 9 if BFIN533_EZKIT
default 9 if BFIN561_EZKIT
default 10 if BFIN537_STAMP
default 11 if BFIN533_STAMP
default 10 if PNAV10
config ENET_FLASH_PIN
int "PF port/pin used for flash and ethernet sharing"
depends on (BFIN533_STAMP)
default 0
help
PF port/pin used for flash and ethernet sharing to allow other PF
pins to be used on other platforms without having to touch common
code.
For example: PF0 --> 0,PF1 --> 1,PF2 --> 2, etc.
config BOOT_LOAD
hex "Kernel load address for booting"
default "0x1000"
help
This option allows you to set the load address of the kernel.
This can be useful if you are on a board which has a small amount
of memory or you wish to reserve some memory at the beginning of
the address space.
Note that you generally want to keep this value at or above 4k
(0x1000) as this will allow the kernel to capture NULL pointer
references.
comment "LED Status Indicators"
depends on (BFIN533_STAMP || BFIN533_BLUETECHNIX_CM)
config BFIN_ALIVE_LED
bool "Enable Board Alive"
depends on (BFIN533_STAMP || BFIN533_BLUETECHNIX_CM)
default n
help
Blink the LEDs you select when the kernel is running. Helps detect
a hung kernel.
config BFIN_ALIVE_LED_NUM
int "LED"
depends on BFIN_ALIVE_LED
range 1 3 if BFIN533_STAMP
default "3" if BFIN533_STAMP
help
Select the LED (marked on the board) for you to blink.
config BFIN_IDLE_LED
bool "Enable System Load/Idle LED"
depends on (BFIN533_STAMP || BFIN533_BLUETECHNIX_CM)
default n
help
Blinks the LED you select when to determine kernel load.
config BFIN_IDLE_LED_NUM
int "LED"
depends on BFIN_IDLE_LED
range 1 3 if BFIN533_STAMP
default "2" if BFIN533_STAMP
help
Select the LED (marked on the board) for you to blink.
#
# Sorry - but you need to put the hex address here -
#
# Flag Data register
config BFIN_ALIVE_LED_PORT
hex
default 0xFFC00700 if (BFIN533_STAMP)
# Peripheral Flag Direction Register
config BFIN_ALIVE_LED_DPORT
hex
default 0xFFC00730 if (BFIN533_STAMP)
config BFIN_ALIVE_LED_PIN
hex
default 0x04 if (BFIN533_STAMP && BFIN_ALIVE_LED_NUM = 1)
default 0x08 if (BFIN533_STAMP && BFIN_ALIVE_LED_NUM = 2)
default 0x10 if (BFIN533_STAMP && BFIN_ALIVE_LED_NUM = 3)
config BFIN_IDLE_LED_PORT
hex
default 0xFFC00700 if (BFIN533_STAMP)
# Peripheral Flag Direction Register
config BFIN_IDLE_LED_DPORT
hex
default 0xFFC00730 if (BFIN533_STAMP)
config BFIN_IDLE_LED_PIN
hex
default 0x04 if (BFIN533_STAMP && BFIN_IDLE_LED_NUM = 1)
default 0x08 if (BFIN533_STAMP && BFIN_IDLE_LED_NUM = 2)
default 0x10 if (BFIN533_STAMP && BFIN_IDLE_LED_NUM = 3)
comment "Console UART Setup"
choice
prompt "Baud Rate"
default BAUD_57600
config BAUD_9600
bool "9600"
config BAUD_19200
bool "19200"
config BAUD_38400
bool "38400"
config BAUD_57600
bool "57600"
config BAUD_115200
bool "115200"
endchoice
choice
prompt "Parity"
default BAUD_NO_PARITY
config BAUD_NO_PARITY
bool "No Parity"
config BAUD_PARITY
bool "Parity"
endchoice
choice
prompt "Stop Bits"
default BAUD_1_STOPBIT
config BAUD_1_STOPBIT
bool "1"
config BAUD_2_STOPBIT
bool "2"
endchoice
endmenu
menu "Blackfin Kernel Optimizations"
comment "Timer Tick"
source kernel/Kconfig.hz
comment "Memory Optimizations"
config I_ENTRY_L1
bool "Locate interrupt entry code in L1 Memory"
default y
help
If enabled interrupt entry code (STORE/RESTORE CONTEXT) is linked
into L1 instruction memory.(less latency)
config EXCPT_IRQ_SYSC_L1
bool "Locate entire ASM lowlevel excepetion / interrupt - Syscall and CPLB handler code in L1 Memory"
default y
help
If enabled entire ASM lowlevel exception and interrupt entry code (STORE/RESTORE CONTEXT) is linked
into L1 instruction memory.(less latency)
config DO_IRQ_L1
bool "Locate frequently called do_irq dispatcher function in L1 Memory"
default y
help
If enabled frequently called do_irq dispatcher function is linked
into L1 instruction memory.(less latency)
config CORE_TIMER_IRQ_L1
bool "Locate frequently called timer_interrupt() function in L1 Memory"
default y
help
If enabled frequently called timer_interrupt() function is linked
into L1 instruction memory.(less latency)
config IDLE_L1
bool "Locate frequently idle function in L1 Memory"
default y
help
If enabled frequently called idle function is linked
into L1 instruction memory.(less latency)
config SCHEDULE_L1
bool "Locate kernel schedule function in L1 Memory"
default y
help
If enabled frequently called kernel schedule is linked
into L1 instruction memory.(less latency)
config ARITHMETIC_OPS_L1
bool "Locate kernel owned arithmetic functions in L1 Memory"
default y
help
If enabled arithmetic functions are linked
into L1 instruction memory.(less latency)
config ACCESS_OK_L1
bool "Locate access_ok function in L1 Memory"
default y
help
If enabled access_ok function is linked
into L1 instruction memory.(less latency)
config MEMSET_L1
bool "Locate memset function in L1 Memory"
default y
help
If enabled memset function is linked
into L1 instruction memory.(less latency)
config MEMCPY_L1
bool "Locate memcpy function in L1 Memory"
default y
help
If enabled memcpy function is linked
into L1 instruction memory.(less latency)
config SYS_BFIN_SPINLOCK_L1
bool "Locate sys_bfin_spinlock function in L1 Memory"
default y
help
If enabled sys_bfin_spinlock function is linked
into L1 instruction memory.(less latency)
config IP_CHECKSUM_L1
bool "Locate IP Checksum function in L1 Memory"
default n
help
If enabled IP Checksum function is linked
into L1 instruction memory.(less latency)
config CACHELINE_ALIGNED_L1
bool "Locate cacheline_aligned data to L1 Data Memory"
default y
depends on !BF531
help
If enabled cacheline_anligned data is linked
into L1 data memory.(less latency)
config SYSCALL_TAB_L1
bool "Locate Syscall Table L1 Data Memory"
default n
depends on !BF531
help
If enabled the Syscall LUT is linked
into L1 data memory.(less latency)
config CPLB_SWITCH_TAB_L1
bool "Locate CPLB Switch Tables L1 Data Memory"
default n
depends on !BF531
help
If enabled the CPLB Switch Tables are linked
into L1 data memory.(less latency)
endmenu
choice
prompt "Kernel executes from"
help
Choose the memory type that the kernel will be running in.
config RAMKERNEL
bool "RAM"
help
The kernel will be resident in RAM when running.
config ROMKERNEL
bool "ROM"
help
The kernel will be resident in FLASH/ROM when running.
endchoice
source "mm/Kconfig"
config LARGE_ALLOCS
bool "Allow allocating large blocks (> 1MB) of memory"
help
Allow the slab memory allocator to keep chains for very large
memory sizes - upto 32MB. You may need this if your system has
a lot of RAM, and you need to able to allocate very large
contiguous chunks. If unsure, say N.
config BFIN_DMA_5XX
bool "Enable DMA Support"
depends on (BF533 || BF532 || BF531 || BF537 || BF536 || BF534 || BF561)
default y
help
DMA driver for BF5xx.
choice
prompt "Uncached SDRAM region"
default DMA_UNCACHED_1M
depends BFIN_DMA_5XX
config DMA_UNCACHED_2M
bool "Enable 2M DMA region"
config DMA_UNCACHED_1M
bool "Enable 1M DMA region"
config DMA_UNCACHED_NONE
bool "Disable DMA region"
endchoice
comment "Cache Support"
config BLKFIN_CACHE
bool "Enable ICACHE"
config BLKFIN_DCACHE
bool "Enable DCACHE"
config BLKFIN_DCACHE_BANKA
bool "Enable only 16k BankA DCACHE - BankB is SRAM"
depends on BLKFIN_DCACHE && !BF531
default n
config BLKFIN_CACHE_LOCK
bool "Enable Cache Locking"
choice
prompt "Policy"
depends on BLKFIN_DCACHE
default BLKFIN_WB
config BLKFIN_WB
bool "Write back"
help
Write Back Policy:
Cached data will be written back to SDRAM only when needed.
This can give a nice increase in performance, but beware of
broken drivers that do not properly invalidate/flush their
cache.
Write Through Policy:
Cached data will always be written back to SDRAM when the
cache is updated. This is a completely safe setting, but
performance is worse than Write Back.
If you are unsure of the options and you want to be safe,
then go with Write Through.
config BLKFIN_WT
bool "Write through"
help
Write Back Policy:
Cached data will be written back to SDRAM only when needed.
This can give a nice increase in performance, but beware of
broken drivers that do not properly invalidate/flush their
cache.
Write Through Policy:
Cached data will always be written back to SDRAM when the
cache is updated. This is a completely safe setting, but
performance is worse than Write Back.
If you are unsure of the options and you want to be safe,
then go with Write Through.
endchoice
config L1_MAX_PIECE
int "Set the max L1 SRAM pieces"
default 16
help
Set the max memory pieces for the L1 SRAM allocation algorithm.
Min value is 16. Max value is 1024.
menu "Clock Settings"
config BFIN_KERNEL_CLOCK
bool "Re-program Clocks while Kernel boots?"
default n
help
This option decides if kernel clocks are re-programed from the
bootloader settings. If the clocks are not set, the SDRAM settings
are also not changed, and the Bootloader does 100% of the hardware
configuration.
config VCO_MULT
int "VCO Multiplier"
depends on BFIN_KERNEL_CLOCK
default "22" if BFIN533_EZKIT
default "45" if BFIN533_STAMP
default "20" if BFIN537_STAMP
default "22" if BFIN533_BLUETECHNIX_CM
default "20" if BFIN537_BLUETECHNIX_CM
default "20" if BFIN561_BLUETECHNIX_CM
default "20" if BFIN561_EZKIT
config CCLK_DIV
int "Core Clock Divider"
depends on BFIN_KERNEL_CLOCK
default 1 if BFIN533_EZKIT
default 1 if BFIN533_STAMP
default 1 if BFIN537_STAMP
default 1 if BFIN533_BLUETECHNIX_CM
default 1 if BFIN537_BLUETECHNIX_CM
default 1 if BFIN561_BLUETECHNIX_CM
default 1 if BFIN561_EZKIT
config SCLK_DIV
int "System Clock Divider"
depends on BFIN_KERNEL_CLOCK
default 5 if BFIN533_EZKIT
default 5 if BFIN533_STAMP
default 4 if BFIN537_STAMP
default 5 if BFIN533_BLUETECHNIX_CM
default 4 if BFIN537_BLUETECHNIX_CM
default 4 if BFIN561_BLUETECHNIX_CM
default 5 if BFIN561_EZKIT
config CLKIN_HALF
bool "Half ClockIn"
depends on BFIN_KERNEL_CLOCK
default n
config PLL_BYPASS
bool "Bypass PLL"
depends on BFIN_KERNEL_CLOCK
default n
endmenu
comment "Asynchonous Memory Configuration"
menu "EBIU_AMBCTL Global Control"
config C_AMCKEN
bool "Enable CLKOUT"
default y
config C_CDPRIO
bool "DMA has priority over core for ext. accesses"
default n
config C_B0PEN
depends on BF561
bool "Bank 0 16 bit packing enable"
default y
config C_B1PEN
depends on BF561
bool "Bank 1 16 bit packing enable"
default y
config C_B2PEN
depends on BF561
bool "Bank 2 16 bit packing enable"
default y
config C_B3PEN
depends on BF561
bool "Bank 3 16 bit packing enable"
default n
choice
prompt"Enable Asynchonous Memory Banks"
default C_AMBEN_ALL
config C_AMBEN
bool "Disable All Banks"
config C_AMBEN_B0
bool "Enable Bank 0"
config C_AMBEN_B0_B1
bool "Enable Bank 0 & 1"
config C_AMBEN_B0_B1_B2
bool "Enable Bank 0 & 1 & 2"
config C_AMBEN_ALL
bool "Enable All Banks"
endchoice
endmenu
menu "EBIU_AMBCTL Control"
config BANK_0
hex "Bank 0"
default 0x7BB0
config BANK_1
hex "Bank 1"
default 0x7BB0
config BANK_2
hex "Bank 2"
default 0x7BB0
config BANK_3
hex "Bank 3"
default 0x99B3
endmenu
endmenu
#############################################################################
menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
config PCI
bool "PCI support"
help
Support for PCI bus.
source "drivers/pci/Kconfig"
config HOTPLUG
bool "Support for hot-pluggable device"
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 KMOD, and build a modular kernel. Get agent
software (at <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"
source "fs/Kconfig.binfmt"
endmenu
menu "Power management options"
source "kernel/power/Kconfig"
choice
prompt "Select PM Wakeup Event Source"
default PM_WAKEUP_GPIO_BY_SIC_IWR
depends on PM
help
If you have a GPIO already configured as input with the corresponding PORTx_MASK
bit set - "Specify Wakeup Event by SIC_IWR value"
config PM_WAKEUP_GPIO_BY_SIC_IWR
bool "Specify Wakeup Event by SIC_IWR value"
config PM_WAKEUP_BY_GPIO
bool "Cause Wakeup Event by GPIO"
config PM_WAKEUP_GPIO_API
bool "Configure Wakeup Event by PM GPIO API"
endchoice
config PM_WAKEUP_SIC_IWR
hex "Wakeup Events (SIC_IWR)"
depends on PM_WAKEUP_GPIO_BY_SIC_IWR
default 0x80000000 if (BF537 || BF536 || BF534)
default 0x100000 if (BF533 || BF532 || BF531)
config PM_WAKEUP_GPIO_NUMBER
int "Wakeup GPIO number"
range 0 47
depends on PM_WAKEUP_BY_GPIO
default 2 if BFIN537_STAMP
choice
prompt "GPIO Polarity"
depends on PM_WAKEUP_BY_GPIO
default PM_WAKEUP_GPIO_POLAR_H
config PM_WAKEUP_GPIO_POLAR_H
bool "Active High"
config PM_WAKEUP_GPIO_POLAR_L
bool "Active Low"
config PM_WAKEUP_GPIO_POLAR_EDGE_F
bool "Falling EDGE"
config PM_WAKEUP_GPIO_POLAR_EDGE_R
bool "Rising EDGE"
config PM_WAKEUP_GPIO_POLAR_EDGE_B
bool "Both EDGE"
endchoice
endmenu
if (BF537 || BF533)
menu "CPU Frequency scaling"
source "drivers/cpufreq/Kconfig"
config CPU_FREQ
bool
default n
help
If you want to enable this option, you should select the
DPMC driver from Character Devices.
endmenu
endif
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
source "arch/blackfin/oprofile/Kconfig"
menu "Kernel hacking"
source "lib/Kconfig.debug"
config DEBUG_HWERR
bool "Hardware error interrupt debugging"
depends on DEBUG_KERNEL
help
When enabled, the hardware error interrupt is never disabled, and
will happen immediately when an error condition occurs. This comes
at a slight cost in code size, but is necessary if you are getting
hardware error interrupts and need to know where they are coming
from.
config DEBUG_ICACHE_CHECK
bool "Check Instruction cache coherancy"
depends on DEBUG_KERNEL
depends on DEBUG_HWERR
help
Say Y here if you are getting wierd unexplained errors. This will
ensure that icache is what SDRAM says it should be, by doing a
byte wise comparision between SDRAM and instruction cache. This
also relocates the irq_panic() function to L1 memory, (which is
un-cached).
config DEBUG_KERNEL_START
bool "Debug Kernel Startup"
depends on DEBUG_KERNEL
help
Say Y here to put in an mini-execption handler before the kernel
replaces the bootloader exception handler. This will stop kernels
from dieing at startup with no visible error messages.
config DEBUG_SERIAL_EARLY_INIT
bool "Initialize serial driver early"
default n
depends on SERIAL_BFIN
help
Say Y here if you want to get kernel output early when kernel
crashes before the normal console initialization. If this option
is enable, console output will always go to the ttyBF0, no matter
what kernel boot paramters you set.
config DEBUG_HUNT_FOR_ZERO
bool "Catch NULL pointer reads/writes"
default y
help
Say Y here to catch reads/writes to anywhere in the memory range
from 0x0000 - 0x0FFF (the first 4k) of memory. This is useful in
catching common programming errors such as NULL pointer dereferences.
Misbehaving applications will be killed (generate a SEGV) while the
kernel will trigger a panic.
Enabling this option will take up an extra entry in CPLB table.
Otherwise, there is no extra overhead.
config DEBUG_BFIN_NO_KERN_HWTRACE
bool "Trace user apps (turn off hwtrace in kernel)"
default n
help
Some pieces of the kernel contain a lot of flow changes which can
quickly fill up the hardware trace buffer. When debugging crashes,
the hardware trace may indicate that the problem lies in kernel
space when in reality an application is buggy.
Say Y here to disable hardware tracing in some known "jumpy" pieces
of code so that the trace buffer will extend further back.
config DUAL_CORE_TEST_MODULE
tristate "Dual Core Test Module"
depends on (BF561)
default n
help
Say Y here to build-in dual core test module for dual core test.
config CPLB_INFO
bool "Display the CPLB information"
help
Display the CPLB information.
config ACCESS_CHECK
bool "Check the user pointer address"
default y
help
Usually the pointer transfer from user space is checked to see if its
address is in the kernel space.
Say N here to disable that check to improve the performance.
endmenu
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"
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