From 74ce8322bf8843e6fd04e081d361c107bcf73564 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Wed, 21 Nov 2007 23:50:49 +0800 Subject: Blackfin arch: split debug stuff off into Kconfig.debug like everyone else Signed-off-by: Mike Frysinger Signed-off-by: Bryan Wu --- arch/blackfin/Kconfig | 169 +---------------------------------------- arch/blackfin/Kconfig.debug | 178 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 179 insertions(+), 168 deletions(-) create mode 100644 arch/blackfin/Kconfig.debug diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index 6afcf2b8f743..b9043ee52804 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -982,174 +982,7 @@ 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 "arch/blackfin/Kconfig.debug" source "security/Kconfig" 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 -- cgit v1.2.3-59-g8ed1b