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2010-08-13Mark arguments to certain syscalls as being constDavid Howells1-1/+1
Mark arguments to certain system calls as being const where they should be but aren't. The list includes: (*) The filename arguments of various stat syscalls, execve(), various utimes syscalls and some mount syscalls. (*) The filename arguments of some syscall helpers relating to the above. (*) The buffer argument of various write syscalls. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-06Blackfin: add support for dynamic ftraceMike Frysinger3-9/+163
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-08-06Blackfin: portmux: fix peripheral map overflow when requesting pinsMichael Hennerich1-1/+1
Some processors have groups of pins that aren't an even number of 16. This causes the array size calculation to under count the number of needed entries due to integer truncation. So on the BF51x, while we should have 3 bitmaps (41 / 16), we end up with 2 and pin requests for the 3rd bank end up scribbling over the top of the GPIO IRQ array. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-08-06Blackfin: BF51x/BF52x: support GPIO Hysteresis/Schmitt Trigger optionsMichael Hennerich1-0/+7
Newer parts have optional Hysteresis/Schmitt Trigger options to help with dirty signals. So add some kconfig options for tuning this and enable it by default for people. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-08-06Blackfin: gpio/portmux: clean up whitespace corruptionMike Frysinger1-2/+2
Random tabs instead of spaces, mixes of the two, and unicode spaces instead of ascii spaces. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-08-06Blackfin: fix DMA/cache bug when resuming from suspend to RAMMichael Hennerich1-2/+17
The dma_memcpy() function takes care of flushing different caches for us. Normally this is what we want, but when resuming from mem, we don't yet have caches enabled. If these functions happen to be placed into L1 mem (which is what we're trying to relocate), then things aren't going to work. So define a non-cache dma_memcpy() variant to utilize in situations like this. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-08-06Blackfin: gpio: unify & clean up reserved map handlingMike Frysinger1-51/+56
The duplicated bit banging logic is getting out of hand, so unify the local API to make management a lot easier. This also makes the code a lot easier to follow. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-08-06Blackfin: move MPU anomaly check to common locationMike Frysinger1-4/+0
Keep all anomaly/arch checks in one place to keep logic simple. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-08-06Blackfin: use common EXCEPTION_TABLE() in vmlinux.ldsMike Frysinger1-6/+1
Rather than do our own thing, use what common code provides. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-27ptrace: unify FDPIC implementationsMike Frysinger1-24/+9
The Blackfin/FRV/SuperH guys all have the same exact FDPIC ptrace code in their arch handlers (since they were probably copied & pasted). Since these ptrace interfaces are an arch independent aspect of the FDPIC code, unify them in the common ptrace code so new FDPIC ports don't need to copy and paste this fundamental stuff yet again. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Roland McGrath <roland@redhat.com> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-05-24Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfinLinus Torvalds11-958/+1510
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (30 commits) Blackfin: SMP: fix continuation lines Blackfin: acvilon: fix timeout usage for I2C Blackfin: fix typo in BF537 IRQ comment Blackfin: unify duplicate MEM_MT48LC32M8A2_75 kconfig options Blackfin: set ARCH_KMALLOC_MINALIGN Blackfin: use atomic kmalloc in L1 alloc so it too can be atomic Blackfin: another year of changes (update copyright in boot log) Blackfin: optimize strncpy a bit Blackfin: isram: clean up ITEST_COMMAND macro and improve the selftests Blackfin: move string functions to normal lib/ assembly Blackfin: SIC: cut down on IAR MMR reads a bit Blackfin: bf537-minotaur: fix build errors due to header changes Blackfin: kgdb: pass up the CC register instead of a 0 stub Blackfin: handle HW errors in the new "FAULT" printing code Blackfin: show the whole accumulator in the pseudo DBG insn Blackfin: support all possible registers in the pseudo instructions Blackfin: add support for the DBG (debug output) pseudo insn Blackfin: change the BUG opcode to an unused 16-bit opcode Blackfin: allow NMI watchdog to be used w/RETN as a scratch reg Blackfin: add support for the DBGA (debug assert) pseudo insn ...
2010-05-22Blackfin: another year of changes (update copyright in boot log)Mike Frysinger1-2/+2
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-22Blackfin: move string functions to normal lib/ assemblyRobin Getz1-0/+12
Since 'extern inline' doesn't work correctly in the context of the Linux kernel (too many overriding defines), move the string functions to normal lib/ assembly files (like the existing mem funcs). This avoids the forced inline all over the kernel and allows us to place them constantly in L1. This also avoids some module failures when gcc inserts calls to string functions but the kernel build system doesn't fully consult the library archives. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-22Blackfin: kgdb: pass up the CC register instead of a 0 stubMike Frysinger1-1/+1
While the CC pseudo register can be deduced from the ASTAT register, make sure we set its value correctly instead of always stubbing it out as 0. GDB itself looks at this pseudo register instead of ASTAT, so we have to supply the right value. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-22Blackfin: handle HW errors in the new "FAULT" printing codeRobin Getz1-0/+9
Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-22Blackfin: show the whole accumulator in the pseudo DBG insnRobin Getz1-6/+19
Rather than print just part of the accumulator register, show the whole 40 bits. This matches the simulator behavior better. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-22Blackfin: support all possible registers in the pseudo instructionsRobin Getz1-6/+61
Rather than decoding just the common R/P registers, handle all of them. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-22Blackfin: add support for the DBG (debug output) pseudo insnRobin Getz2-18/+70
Another pseudo insn used by Blackfin simulators. Also factor some now common register lookup code out of the DBGA handlers. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-22Blackfin: add support for the DBGA (debug assert) pseudo insnRobin Getz3-0/+89
A few pseudo debug insns exist to make testing of simulators easier. Since these don't actually exist in the hardware, we have to have the exception handler take care of emulating these. This allows sim test cases to be executed unmodified under Linux and thus simplify debugging greatly. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-21Blackfin: make hardware trace output a little more usefulRobin Getz3-64/+443
Decode the vast majority of insns that appear in the trace buffer to get a better idea of what's going on at a glance. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-21Blackfin: print out the faulting insn in the trace outputRobin Getz1-2/+17
Print out the faulting instruction so when people send traces as part of bug reports, we have a better idea of what is going on. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-21Blackfin: remove CONFIG_DEBUG_VERBOSE from trace.cRobin Getz3-123/+109
Now that the split traps code has moved all the verbose output to the trace.c file, we can unify all the CONFIG_DEBUG_VERBOSE handling. This gets rid of much of the crappy ifdef forest and enables usage of normal pr_xxx functions so checkpatch stops complaining. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-21Blackfin: split kernel/traps.cRobin Getz6-836/+885
The current kernel/traps.c file has grown a bit unwieldy as more debugging functionality has been added over time, so split it up into more logical files. There should be no functional changes here, just minor whitespace tweaking. This should make future extensions easier to manage. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-21Blackfin: punt Blackfin-specific GPIO wakeup APIMichael Hennerich1-119/+12
This patch removes a custom GPIO wakeup API which allowed GPIOs to act as wakeup sources, which are not configured as Interrupts. This API is a leftover from the time before irq_wake was established. From now on people must use enable_irq_wake(GPIO_IRQx) and the GPIO in question needs to be configured as Interrupt. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-20kgdb,blackfin: Add in kgdb_arch_set_pc for blackfinJason Wessel1-0/+5
The new debug core api requires all architectures that use to debug core to implement a function to set the program counter. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Acked-by: Sonic Zhang <sonic.zhang@analog.com> Acked-by: Mike Frysinger <vapier@gentoo.org>
2010-05-19Merge branch 'timers-for-linus-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tipLinus Torvalds2-39/+13
* 'timers-for-linus-cleanups' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: avr32: Fix typo in read_persistent_clock() sparc: Convert sparc to use read/update_persistent_clock cris: Convert cris to use read/update_persistent_clock m68k: Convert m68k to use read/update_persistent_clock m32r: Convert m32r to use read/update_peristent_clock blackfin: Convert blackfin to use read/update_persistent_clock ia64: Convert ia64 to use read/update_persistent_clock avr32: Convert avr32 to use read/update_persistent_clock h8300: Convert h8300 to use read/update_persistent_clock frv: Convert frv to use read/update_persistent_clock mn10300: Convert mn10300 to use read/update_persistent_clock alpha: Convert alpha to use read/update_persistent_clock xtensa: Fix unnecessary setting of xtime time: Clean up direct xtime usage in xen
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.hTejun Heo2-1/+1
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-13blackfin: Convert blackfin to use read/update_persistent_clockJohn Stultz2-39/+13
This patch converts the blackfin architecture to use the generic read_persistent_clock and update_persistent_clock interfaces, reducing the amount of arch specific code we have to maintain, and allowing for further cleanups in the future. I have not built or tested this patch, so help from arch maintainers would be appreciated. Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <1267675049-12337-10-git-send-email-johnstul@us.ibm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2010-03-09Blackfin: mark gpio lib functions staticJoachim Eastwood1-7/+7
Signed-off-by: Joachim Eastwood <joachim.eastwood@jotron.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: GPIO: implement to_irq handlerJoachim Eastwood1-0/+6
This makes it possible to support IRQs coming from off-chip GPIO controllers. Signed-off-by: Joachim Eastwood <joachim.eastwood@jotron.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: remove trailing space in messagesFrans Pop2-6/+6
Signed-off-by: Frans Pop <elendil@planet.nl> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: add support for restart_syscall()Mike Frysinger1-0/+9
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: fix single stepping over system callsMike Frysinger2-3/+11
On Blackfin systems, the hardware single step exception triggers before the system call exception, so we need to save this info to process it later on. Otherwise, single stepping in userspace misses a few insns right after the system call. This is based a bit on the SuperH code added in commit 4b505db9c4c72dbd. Reported-by: Roland McGrath <roland@redhat.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: initial tracehook supportMike Frysinger2-60/+20
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: initial regset supportMike Frysinger2-30/+90
We don't support core dumps (yet?), but this should make things easier. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: simplify PTRACE_{PEEK,POKE}USR in preperation for regset supportMike Frysinger1-67/+51
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: simplify SYSCFG code a bit and ignore attempts to change itMike Frysinger1-18/+6
We don't want to let user space modify the SYSCFG register arbitrarily as the settings are system wide (SNEN/CNEN) and can cause misbehavior. The only other bit here (SSSTEP) has proper controls via PTRACE_SINGLESTEP. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: use generic ptrace_resume codeChristoph Hellwig1-44/+0
Use the generic ptrace_resume code for PTRACE_SYSCALL, PTRACE_CONT, PTRACE_KILL and PTRACE_SINGLESTEP. This implies defining arch_has_single_step in <asm/ptrace.h> and implementing the user_enable_single_step and user_disable_single_step functions, which also causes the breakpoint information to be cleared on fork, which could be considered a bug fix. Also the TIF_SYSCALL_TRACE thread flag is now cleared on PTRACE_KILL which it previously wasn't which is consistent with all architectures using the modern ptrace code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: rewrite resync_core_{i,d}cache() SMP logic to avoid per_cpu dataGraf Yang1-2/+2
This functions are implicitly called by core functions like cpu_relax(), and since those functions may be called early on before common code has initialized the per-cpu data area, we need to tweak the stats gathering. Now the statistics are maintained in common bss which makes these funcs safe to use as soon as the C runtime env is setup. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: add support for cpufreq on SMP systemsGraf Yang1-0/+4
Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: split watchdog definitions into a dedicated header fileGraf Yang1-15/+1
This allows things to be shared between the different watchdog sources. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: support new ftrace frame pointer semanticsMike Frysinger2-5/+13
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: implement ftrace mcount testMike Frysinger1-1/+10
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: implement nmi_watchdog for SMP on BF561Graf Yang3-0/+318
Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: respect the L1 kconfig optimization in the MPU codeBarry Song1-6/+12
Restore support for CONFIG_EXCPT_IRQ_SYSC_L1 in the MPU CPLB manager. Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: fill out the signal si_addr when sending a SIGBUS/SIGSEGVBarry Song1-3/+11
Some userspace applications use this member in diagnosing crashes. It also makes some LTP tests pass (i.e. the Blackfin arch behaves more like everyone else). Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: fix up mm locking in address dumpingGraf Yang1-1/+13
The locking code in the address dumper needs to grab the mm's mmap_sem so that other CPUs do not get an inconsistent view. On UP systems this really wasn't a problem, but it is easy to trigger a race on SMP systems when another CPU removes a mapping. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: kgdb: mark all local funcs/structs staticMike Frysinger1-5/+5
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: fix decoding of opcodes 41-47 in decode_instruction()Roel Kluin1-1/+1
This condition allowed only decoding of opcode 0x0040 Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: initial XIP supportBarry Song5-7/+92
Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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