Blackfin arch: split debug stuff off into Kconfig.debug like everyone else

Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

1 files changed, 178 insertions, 0 deletions

diff --git a/arch/blackfin/Kconfig.debug b/arch/blackfin/Kconfig.debug
new file mode 100644
index 000000000000..59b87a483c68
--- /dev/null
+++ b/arch/blackfin/Kconfig.debug
@@ -0,0 +1,178 @@
+menu "Kernel hacking"
+
+source "lib/Kconfig.debug"
+
+config DEBUG_MMRS
+        bool "Generate Blackfin MMR tree"
+        select DEBUG_FS
+        help
+          Create a tree of Blackfin MMRs via the debugfs tree.  If
+          you enable this, you will find all MMRs laid out in the
+          /sys/kernel/debug/blackfin/ directory where you can read/write
+          MMRs directly from userspace.  This is obviously just a debug
+          feature.
+
+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