#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#
mainmenu "Blackfin 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 ZONE_DMA
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_GPIO
bool
default y
config FORCE_MAX_ZONEORDER
int
default "14"
config GENERIC_CALIBRATE_DELAY
bool
default y
config IRQCHIP_DEMUX_GPIO
bool
depends on (BF52x || BF53x || BF561 || BF54x)
default y
source "init/Kconfig"
source "kernel/Kconfig.preempt"
menu "Blackfin Processor Options"
comment "Processor and Board Settings"
choice
prompt "CPU"
default BF533
config BF522
bool "BF522"
help
BF522 Processor Support.
config BF525
bool "BF525"
help
BF525 Processor Support.
config BF527
bool "BF527"
help
BF527 Processor Support.
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 BF542
bool "BF542"
help
BF542 Processor Support.
config BF544
bool "BF544"
help
BF544 Processor Support.
config BF548
bool "BF548"
help
BF548 Processor Support.
config BF549
bool "BF549"
help
BF549 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_1 if BF527
default BF_REV_0_2 if BF537
default BF_REV_0_3 if BF533
default BF_REV_0_0 if BF549
config BF_REV_0_0
bool "0.0"
depends on (BF52x || BF54x)
config BF_REV_0_1
bool "0.1"
depends on (BF52x || BF54x)
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)
config BF_REV_ANY
bool "any"
config BF_REV_NONE
bool "none"
endchoice
config BF52x
bool
depends on (BF522 || BF525 || BF527)
default y
config BF53x
bool
depends on (BF531 || BF532 || BF533 || BF534 || BF536 || BF537)
default y
config BF54x
bool
depends on (BF542 || BF544 || BF548 || BF549)
default y
config BFIN_DUAL_CORE
bool
depends on (BF561)
default y
config BFIN_SINGLE_CORE
bool
depends on !BFIN_DUAL_CORE
default y
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 \
|| H8606_HVSISTEMAS)
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 MEM_MT48LC32M16A2TG_75
bool
depends on (BFIN527_EZKIT)
default y
config BFIN_SHARED_FLASH_ENET
bool
depends on (BFIN533_STAMP)
default y
source "arch/blackfin/mach-bf527/Kconfig"
source "arch/blackfin/mach-bf533/Kconfig"
source "arch/blackfin/mach-bf561/Kconfig"
source "arch/blackfin/mach-bf537/Kconfig"
source "arch/blackfin/mach-bf548/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 "Clock/PLL Setup"
config CLKIN_HZ
int "Crystal Frequency in Hz"
default "11059200" if BFIN533_STAMP
default "27000000" if BFIN533_EZKIT
default "25000000" if (BFIN537_STAMP || BFIN527_EZKIT || H8606_HVSISTEMAS)
default "30000000" if BFIN561_EZKIT
default "24576000" if PNAV10
help
The frequency of CLKIN crystal oscillator on the board in Hz.
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 PLL_BYPASS
bool "Bypass PLL"
depends on BFIN_KERNEL_CLOCK
default n
config CLKIN_HALF
bool "Half Clock In"
depends on BFIN_KERNEL_CLOCK && (! PLL_BYPASS)
default n
help
If this is set the clock will be divided by 2, before it goes to the PLL.
config VCO_MULT
int "VCO Multiplier"
depends on BFIN_KERNEL_CLOCK && (! PLL_BYPASS)
range 1 64
default "22" if BFIN533_EZKIT
default "45" if BFIN533_STAMP
default "20" if (BFIN537_STAMP || BFIN527_EZKIT)
default "22" if BFIN533_BLUETECHNIX_CM
default "20" if BFIN537_BLUETECHNIX_CM
default "20" if BFIN561_BLUETECHNIX_CM
default "20" if BFIN561_EZKIT
default "16" if H8606_HVSISTEMAS
help
This controls the frequency of the on-chip PLL. This can be between 1 and 64.
PLL Frequency = (Crystal Frequency) * (this setting)
choice
prompt "Core Clock Divider"
depends on BFIN_KERNEL_CLOCK
default CCLK_DIV_1
help
This sets the frequency of the core. It can be 1, 2, 4 or 8
Core Frequency = (PLL frequency) / (this setting)
config CCLK_DIV_1
bool "1"
config CCLK_DIV_2
bool "2"
config CCLK_DIV_4
bool "4"
config CCLK_DIV_8
bool "8"
endchoice
config SCLK_DIV
int "System Clock Divider"
depends on BFIN_KERNEL_CLOCK
range 1 15
default 5 if BFIN533_EZKIT
default 5 if BFIN533_STAMP
default 4 if (BFIN537_STAMP || BFIN527_EZKIT)
default 5 if BFIN533_BLUETECHNIX_CM
default 4 if BFIN537_BLUETECHNIX_CM
default 4 if BFIN561_BLUETECHNIX_CM
default 5 if BFIN561_EZKIT
default 3 if H8606_HVSISTEMAS
help
This sets the frequency of the system clock (including SDRAM or DDR).
This can be between 1 and 15
System Clock = (PLL frequency) / (this setting)
#
# Max & Min Speeds for various Chips
#
config MAX_VCO_HZ
int
default 600000000 if BF522
default 600000000 if BF525
default 600000000 if BF527
default 400000000 if BF531
default 400000000 if BF532
default 750000000 if BF533
default 500000000 if BF534
default 400000000 if BF536
default 600000000 if BF537
default 533000000 if BF538
default 533000000 if BF539
default 600000000 if BF542
default 533000000 if BF544
default 533000000 if BF549
default 600000000 if BF561
config MIN_VCO_HZ
int
default 50000000
config MAX_SCLK_HZ
int
default 133000000
config MIN_SCLK_HZ
int
default 27000000
comment "Kernel Timer/Scheduler"
source kernel/Kconfig.hz
comment "Memory Setup"
config MEM_SIZE
int "SDRAM Memory Size in MBytes"
default 32 if BFIN533_EZKIT
default 64 if BFIN527_EZKIT
default 64 if BFIN537_STAMP
default 64 if BFIN561_EZKIT
default 128 if BFIN533_STAMP
default 64 if PNAV10
default 32 if H8606_HVSISTEMAS
config MEM_ADD_WIDTH
int "SDRAM Memory Address Width"
default 9 if BFIN533_EZKIT
default 9 if BFIN561_EZKIT
default 9 if H8606_HVSISTEMAS
default 10 if BFIN527_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"
range 0x1000 0x20000000
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 need to keep this value above 4k (0x1000) as this
memory region is used to capture NULL pointer references as well
as some core kernel functions.
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.
choice
prompt "Blackfin Exception Scratch Register"
default BFIN_SCRATCH_REG_RETN
help
Select the resource to reserve for the Exception handler:
- RETN: Non-Maskable Interrupt (NMI)
- RETE: Exception Return (JTAG/ICE)
- CYCLES: Performance counter
If you are unsure, please select "RETN".
config BFIN_SCRATCH_REG_RETN
bool "RETN"
help
Use the RETN register in the Blackfin exception handler
as a stack scratch register. This means you cannot
safely use NMI on the Blackfin while running Linux, but
you can debug the system with a JTAG ICE and use the
CYCLES performance registers.
If you are unsure, please select "RETN".
config BFIN_SCRATCH_REG_RETE
bool "RETE"
help
Use the RETE register in the Blackfin exception handler
as a stack scratch register. This means you cannot
safely use a JTAG ICE while debugging a Blackfin board,
but you can safely use the CYCLES performance registers
and the NMI.
If you are unsure, please select "RETN".
config BFIN_SCRATCH_REG_CYCLES
bool "CYCLES"
help
Use the CYCLES register in the Blackfin exception handler
as a stack scratch register. This means you cannot
safely use the CYCLES performance registers on a Blackfin
board at anytime, but you can debug the system with a JTAG
ICE and use the NMI.
If you are unsure, please select "RETN".
endchoice
#
# 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)
endmenu
menu "Blackfin Kernel Optimizations"
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 exception / interrupt - Syscall and CPLB handler code in L1 Memory"
default y
help
If enabled, the 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, the 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, the 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, the 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, the 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, the 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, the 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, the 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, the 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 if !BF54x
default n if BF54x
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_GPTIMERS
tristate "Enable Blackfin General Purpose Timers API"
default n
help
Enable support for the General Purpose Timers API. If you
are unsure, say N.
To compile this driver as a module, choose M here: the module
will be called gptimers.ko.
config BFIN_DMA_5XX
bool "Enable DMA Support"
depends on (BF52x || BF53x || BF561 || BF54x)
default y
help
DMA driver for BF5xx.
choice
prompt "Uncached SDRAM region"
default DMA_UNCACHED_1M
depends on 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 BFIN_ICACHE
bool "Enable ICACHE"
config BFIN_DCACHE
bool "Enable DCACHE"
config BFIN_DCACHE_BANKA
bool "Enable only 16k BankA DCACHE - BankB is SRAM"
depends on BFIN_DCACHE && !BF531
default n
config BFIN_ICACHE_LOCK
bool "Enable Instruction Cache Locking"
choice
prompt "Policy"
depends on BFIN_DCACHE
default BFIN_WB
config BFIN_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 BFIN_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.
comment "Asynchonous Memory Configuration"
menu "EBIU_AMGCTL Global Control"
config C_AMCKEN
bool "Enable CLKOUT"
default y
config C_CDPRIO
bool "DMA has priority over core for ext. accesses"
depends on !BF54x
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 || BF54x)
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 "kernel/Kconfig.instrumentation"
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 coherency"
depends on DEBUG_KERNEL
depends on DEBUG_HWERR
help
Say Y here if you are getting weird unexplained errors. This will
ensure that icache is what SDRAM says it should be by doing a
byte wise comparison between SDRAM and instruction cache. This
also relocates the irq_panic() function to L1 memory, (which is
un-cached).
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_HWTRACE_ON
bool "Turn on Blackfin's Hardware Trace"
default y
help
All Blackfins include a Trace Unit which stores a history of the last
16 changes in program flow taken by the program sequencer. The history
allows the user to recreate the program sequencer’s recent path. This
can be handy when an application dies - we print out the execution
path of how it got to the offending instruction.
By turning this off, you may save a tiny amount of power.
choice
prompt "Omit loop Tracing"
default DEBUG_BFIN_HWTRACE_COMPRESSION_OFF
depends on DEBUG_BFIN_HWTRACE_ON
help
The trace buffer can be configured to omit recording of changes in
program flow that match either the last entry or one of the last
two entries. Omitting one of these entries from the record prevents
the trace buffer from overflowing because of any sort of loop (for, do
while, etc) in the program.
Because zero-overhead Hardware loops are not recorded in the trace buffer,
this feature can be used to prevent trace overflow from loops that
are nested four deep.
config DEBUG_BFIN_HWTRACE_COMPRESSION_OFF
bool "Trace all Loops"
help
The trace buffer records all changes of flow
config DEBUG_BFIN_HWTRACE_COMPRESSION_ONE
bool "Compress single-level loops"
help
The trace buffer does not record single loops - helpful if trace
is spinning on a while or do loop.
config DEBUG_BFIN_HWTRACE_COMPRESSION_TWO
bool "Compress two-level loops"
help
The trace buffer does not record loops two levels deep. Helpful if
the trace is spinning in a nested loop
endchoice
config DEBUG_BFIN_HWTRACE_COMPRESSION
int
depends on DEBUG_BFIN_HWTRACE_ON
default 0 if DEBUG_BFIN_HWTRACE_COMPRESSION_OFF
default 1 if DEBUG_BFIN_HWTRACE_COMPRESSION_ONE
default 2 if DEBUG_BFIN_HWTRACE_COMPRESSION_TWO
config DEBUG_BFIN_HWTRACE_EXPAND
bool "Expand Trace Buffer greater than 16 entries"
depends on DEBUG_BFIN_HWTRACE_ON
default n
help
By selecting this option, every time the 16 hardware entries in
the Blackfin's HW Trace buffer are full, the kernel will move them
into a software buffer, for dumping when there is an issue. This
has a great impact on performance, (an interrupt every 16 change of
flows) and should normally be turned off, except in those nasty
debugging sessions
config DEBUG_BFIN_HWTRACE_EXPAND_LEN
int "Size of Trace buffer (in power of 2k)"
range 0 4
depends on DEBUG_BFIN_HWTRACE_EXPAND
default 1
help
This sets the size of the software buffer that the trace information
is kept in.
0 for (2^0) 1k, or 256 entries,
1 for (2^1) 2k, or 512 entries,
2 for (2^2) 4k, or 1024 entries,
3 for (2^3) 8k, or 2048 entries,
4 for (2^4) 16k, or 4096 entries
config DEBUG_BFIN_NO_KERN_HWTRACE
bool "Trace user apps (turn off hwtrace in kernel)"
depends on DEBUG_BFIN_HWTRACE_ON
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 EARLY_PRINTK
bool "Early printk"
default n
help
This option enables special console drivers which allow the kernel
to print messages very early in the bootup process.
This is useful for kernel debugging when your machine crashes very
early before the console code is initialized. After enabling this
feature, you must add "earlyprintk=serial,uart0,57600" to the
command line (bootargs). It is safe to say Y here in all cases, as
all of this lives in the init section and is thrown away after the
kernel boots completely.
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"
