Commit d5ce528c8e (Blackfin: convert irq/process to asm-generic)
incorrectly merged the smp and non-smp cases of start_thread() causing the
L1 stack to be setup on the SMP port instead of the UP port.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
To set zeroes the sizeof the struct should be used rather
than sizeof the pointer, kzalloc does that.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Commit c014e15a2f (Blackfin: convert ptrace to new memory functions)
introduced a copy & paste typo in the ptrace poke data/text handling. The
access_process_vm() function call was telling it to read instead of write.
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Parts that have on-chip L2 SRAM cannot safely utilize writeback caching
mode, so reject any attempts to use it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Ironically, the atomic testset instruction cannot be interrupted else it
will produce incorrect results. So disable interrupts to help it out.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Add some recently documented anomalies (473, 474, 475, 477). Also stick
a "do not edit" notice in here so people know these are copies of some
master version.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The Kconfig option is "BFIN_EXTMEM_WRITETHROUGH", not "..._WRITETROUGH".
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Some Blackfin on-chip ROMs utilize some MDMA channels during the suspend
and resume process, but don't clean up after themselves. So manually
clear all DMA channels when resuming since no DMA could have been running
at this point in time. Now Linux should be able to work regardless of any
laziness on the part of the on-chip ROM or boot loader.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
After m68k's task_thread_info() doesn't refer to current,
it's possible to remove sched.h from interrupt.h and not break m68k!
Many thanks to Heiko Carstens for allowing this.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Blackfin already sets proper flow handlers on all IRQs, and we don't rely
on __do_IRQ, therefore we can simply select GENERIC_HARDIRQS_NO__DO_IRQ.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The simple-gpio has been replaced by the gpio sysfs interface, so drop the
unused simple-gpio resources from all Blackfin boards.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The patch added a special get_unmapped_area for framebuffer which
was hooked to the file ops in drivers/video/fbmem.c.
This is needed since v2.6.29-rc1 where nommu vma management was
updated, and mmap of framebuffer caused kernel BUG panic. You may turn
on "Debug the global anon/private NOMMU mapping region tree" config to
such message.
As Documentation/nommu-mmap.txt said,
"To provide shareable character device support, a driver must provide
a file->f_op->get_unmapped_area() operation. The mmap() routines will
call this to get a proposed address for the mapping."
With this change, user space should call mmap for framebuffer using
shared map. Or it can try shared map first, then private map if
failed. This shared map usage is now consistent between mmu and nommu.
The sys_ file may not be a good place for this patch. But there is a
similar one for sparc. I tested a similar patch on nios2nommu, though
I don't have a blackfin board to test.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Fix the following 'make includecheck' warning:
arch/blackfin/mach-bf548/boards/ezkit.c: linux/input.h is included more than once.
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Structs get initialized to 0 already, and we want to punt this field, so
scrub it from all of our boards.
Reported-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Now that the common jedec_probe supports the ST PSD4256G6V, no need to
use the custom stm_flash driver.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Now that the driver has been updated, convert the board resources to the
new i2c framework for managing slaves.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Looks like the big Kconfig cache split/rename missed one spot in the SMP
cache lock headers.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The cplbinfo was using d_path() to figure out which cpu/cplb was being
parsed. As Al pointed out, this isn't exactly reliable as it assumes the
static VFS path to be unchanged, and it's just poor form. So use the
proc_create_data() to properly (and internally) pass the exact cpu/cplb
requested to the parser function.
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The asm/irq.h header uses anomaly defines, but doesn't make sure to
explicitly include the anomaly header for them.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Bill Gatliff & David Brownell pointed out we were missing some
copyrights, and licensing terms in some of the files in
./arch/blackfin, so this fixes things, and cleans them up.
It also removes:
- verbose GPL text(refer to the top level ./COPYING file)
- file names (you are looking at the file)
- bug url (it's in the ./MAINTAINERS file)
- "or later" on GPL-2, when we did not have that right
It also allows some Blackfin-specific assembly files to be under a BSD
like license (for people to use them outside of Linux).
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Convert Blackfin to use GENERIC_TIME via the arch_getoffset()
infrastructure, reducing the amount of arch specific code we need to
maintain.
I've taken my best swing at converting this, but I'm not 100% confident
I got it right. My cross-compiler is now out of date (gcc4.2) so I
wasn't able to check if it compiled. Any assistance from arch
maintainers or testers to get this merged would be great.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Bye-bye Performance Counters, welcome Performance Events!
In the past few months the perfcounters subsystem has grown out its
initial role of counting hardware events, and has become (and is
becoming) a much broader generic event enumeration, reporting, logging,
monitoring, analysis facility.
Naming its core object 'perf_counter' and naming the subsystem
'perfcounters' has become more and more of a misnomer. With pending
code like hw-breakpoints support the 'counter' name is less and
less appropriate.
All in one, we've decided to rename the subsystem to 'performance
events' and to propagate this rename through all fields, variables
and API names. (in an ABI compatible fashion)
The word 'event' is also a bit shorter than 'counter' - which makes
it slightly more convenient to write/handle as well.
Thanks goes to Stephane Eranian who first observed this misnomer and
suggested a rename.
User-space tooling and ABI compatibility is not affected - this patch
should be function-invariant. (Also, defconfigs were not touched to
keep the size down.)
This patch has been generated via the following script:
FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')
sed -i \
-e 's/PERF_EVENT_/PERF_RECORD_/g' \
-e 's/PERF_COUNTER/PERF_EVENT/g' \
-e 's/perf_counter/perf_event/g' \
-e 's/nb_counters/nb_events/g' \
-e 's/swcounter/swevent/g' \
-e 's/tpcounter_event/tp_event/g' \
$FILES
for N in $(find . -name perf_counter.[ch]); do
M=$(echo $N | sed 's/perf_counter/perf_event/g')
mv $N $M
done
FILES=$(find . -name perf_event.*)
sed -i \
-e 's/COUNTER_MASK/REG_MASK/g' \
-e 's/COUNTER/EVENT/g' \
-e 's/\<event\>/event_id/g' \
-e 's/counter/event/g' \
-e 's/Counter/Event/g' \
$FILES
... to keep it as correct as possible. This script can also be
used by anyone who has pending perfcounters patches - it converts
a Linux kernel tree over to the new naming. We tried to time this
change to the point in time where the amount of pending patches
is the smallest: the end of the merge window.
Namespace clashes were fixed up in a preparatory patch - and some
stylistic fallout will be fixed up in a subsequent patch.
( NOTE: 'counters' are still the proper terminology when we deal
with hardware registers - and these sed scripts are a bit
over-eager in renaming them. I've undone some of that, but
in case there's something left where 'counter' would be
better than 'event' we can undo that on an individual basis
instead of touching an otherwise nicely automated patch. )
Suggested-by: Stephane Eranian <eranian@google.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <linux-arch@vger.kernel.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Replace the use of CROSS_COMPILE to select a customized
installkernel script with the possibility to set INSTALLKERNEL
to select a custom installkernel script when running make:
make INSTALLKERNEL=arm-installkernel install
With this patch we are now more consistent across
different architectures - they did not all support use
of CROSS_COMPILE.
The use of CROSS_COMPILE was a hack as this really belongs
to gcc/binutils and the installkernel script does not change
just because we change toolchain.
The use of CROSS_COMPILE caused troubles with an upcoming patch
that saves CROSS_COMPILE when a kernel is built - it would no
longer be installable.
[Thanks to Peter Z. for this hint]
This patch undos what Ian did in commit:
0f8e2d62fa
("use ${CROSS_COMPILE}installkernel in arch/*/boot/install.sh")
The patch has been lightly tested on x86 only - but all changes
looks obvious.
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Mike Frysinger <vapier@gentoo.org> [blackfin]
Acked-by: Russell King <linux@arm.linux.org.uk> [arm]
Acked-by: Paul Mundt <lethal@linux-sh.org> [sh]
Acked-by: "H. Peter Anvin" <hpa@zytor.com> [x86]
Cc: Ian Campbell <icampbell@arcom.com>
Cc: Tony Luck <tony.luck@intel.com> [ia64]
Cc: Fenghua Yu <fenghua.yu@intel.com> [ia64]
Cc: Hirokazu Takata <takata@linux-m32r.org> [m32r]
Cc: Geert Uytterhoeven <geert@linux-m68k.org> [m68k]
Cc: Kyle McMartin <kyle@mcmartin.ca> [parisc]
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> [powerpc]
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> [s390]
Cc: Thomas Gleixner <tglx@linutronix.de> [x86]
Cc: Ingo Molnar <mingo@redhat.com> [x86]
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
The mcount support that was finally added to the Blackfin gcc port isn't
exactly the same as what ftrace was developed against. Now that the final
gcc version is in place, update the ftrace code to match.
While updating this, fix the swapped arguments to the tracer (signature is
(ip, parent_ip) while we were passing (parent_ip, ip)).
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The elf_fpregset_t type relied on an empty struct in the asm/user.h, but
the transition to asm-generic/user.h dropped that empty struct. Rather
than restore this useless struct, define the only user (elf_fpregset_t)
as an empty struct itself. This fixes building when ELF dump support is
enabled.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The CPLB implementations (mpu/nompu) had exact copies of the cacheinit
code. Even the i/d cache functions are largely the same. So unify them
both in the common kernel cache code.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The cycles clocksource is a higher resolution than the gptimer one, so
make sure the ratings field reflects this.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Commit 71e308a239 updated ftrace_push_return_trace() prototype but didn't
update the Blackfin ftrace code, so things broke. Since we don't support
the new stuff yet, call it with stub values.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The cm-bf537u module, while similar to the cm-bf537e, is different enough
to warrant its own resources. It has a USB controller but no PHY.
Signed-off-by: Harald Krapfenbauer <Harald.Krapfenbauer@bluetechnix.at>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The default async timings are a little too fast for the parallel flash
that is attached by default to the async banks. So slow things down a bit
so accessing the hardware is stable.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When doing XIP, we need to execute out of the async banks, so we need
ICPLBs to allow this.
Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Most messages are already using KERN_ALERT, so be consistent to make
things easier to check with test scripts.
Signed-off-by: Mingquan Pan <grace.pan@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The BF54x has three slave select signals for SPI0/SPI1, not eight.
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The DTEST write bit is 2, not 1. Improve comments in the related macro
while we're here.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Make sure our interrupt entry code with exact hardware errors handles
anomaly 05000283 (infinite stall in system MMR kill) so we don't stall
while under load.
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When preempt debugging is enabled, smp_processor_id() may utilize the
"current" structure. This may not be safe to access under all exceptions
due to it being in dynamically allocated memory. So in exception code,
make sure we use raw_smp_processor_id() instead to get at the real value
directly.
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Not sure whether this has been reported/fixed before.
Today I built a Blackfin tool-chain from scratch for -tip testing,
and it triggers:
arch/blackfin/kernel/vmlinux.lds:1238: undefined section `.data_a_l1' referenced in expression
and:
arch/blackfin/kernel/vmlinux.lds:1238: undefined section `.text_data_l1'
referenced in expression
Now i dont have any way to test this linker script, but it now at
least builds fine after fixing what appears to be typos in those
assert statements.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The majority of the time we are returning to user space, it is not in the
fixed atomic code region. So rather than branch to a function where we
check the PC and return, do the check inline and branch only when needed.
Also, tweak some of the fixed code handling based on assumptions we are
aware of but cannot be expressed in C.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Graf Yang