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>
Just generate a random MAC on the demo board since the ADF702x lacks
dedicated storage for such things.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When the kernel is executing out of parallel flash (XIP), we can't have
the flash go into an erase/programming cycle, otherwise the instruction
fetching steps fail and everything crashes.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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>
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>
During very early init, the stack pointer is given a slightly incorrect
value (&init_thread_union). The value is later adjusted to the right one
during early init (&init_thread_union + THREAD_SIZE), but it is used a few
times in between. While the few functions used don't actually put things
onto the stack (due to optimization), it's best if we simply use the right
value from the start.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Use the common attribute rather than setting the section name directly.
The common linker script defines expect the newer naming.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Since we are now discarding .exit.text at runtime instead of link time, we
need to place all .text sections ahead of the .data sections. Otherwise,
a really large attached initramfs may cause link errors as it pushes the
PC relative relocations behind the limits of the Blackfin ISA (~16meg).
The instructions in the .exit.text are unable to call back into the .text
sections leading to a link failure.
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
There is no need to use {get,put}_cpu() when we already have a spinlock to
protect against multiple processors running simultaneously.
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
SMP systems require per-cpu local clock event devices in order to enable
HRT support. One a BF561, we can use local core timer for this purpose.
Originally, there was one global core-timer clock event device set up for
core A.
To accomplish this feat, we need to split the gptimer0/core timer logic
so that each is a standalone clock event. There is no requirement that
we only have one clock event source anyways. Once we have this, we just
define per-cpu clock event devices for each local core timer.
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Common API already provides functions for managing online CPUs.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Now that the Blackfin IRQ controller supports this, drivers get the normal
functionality of controlling which CPU to bind IRQs to.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The Kconfig option was never mainlined, so replace the define with the
actual pin that it is hooked up to by default.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The BF51x's Instruction SRAM is 32kB, not 48kB.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The gpio label size is 16 char, but the current code uses a longer name
resulting in chopped display. So use a shorter name.
Reported-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Make sure the non-constant version of the dma_sync functions actually
complete instead of recursively calling itself forever.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The current Blackfin SMP code relies on the legacy cpu area code, so
select it until we port things to the newer code.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
We weren't handling the user-specified cache behavior for the reserved
memory regions (via mem=/max_mem=). The no-MPU code already takes care
of this, so add support to the MPU code as well.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This lets us support the new BF527-EZKIT V2.1 via platform resources
tweaks only.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Attempting to use the MPU while doing XIP out of parallel flash hooked up
to the async memory bus would often result in random crashes as the MPU
slowly corrupted memory.
The fallout here is that the async banks gain MPU protection from user
space too. So any accesses have to go through the mmap() interface rather
than just using hardcoded pointers.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Sometimes a SMP system will randomly panic at boot. This is due to caches
being out of sync when one core tries to signal the other. So when one
core calls another via IPI, flush the data caches.
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Rather than have every SPORT driver copy & paste things, declare the C
structure and MMR bitmasks in one place for everyone to use.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This lets people easily select the UART/SPORT consoles for early printk
while leveraging the pins declared in the boards file.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Rather than keeping the pins in the actual driver and worrying about a
mess of Kconfig options, declare all the desired pin resources in the
boards file. This lets people easily select the specific pins/ports for
the normal emulated UART as well as GPIOs for CTS/RTS.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Rather than keeping the pins in the actual driver and worrying about a
mess of Kconfig options, declare all the desired pin resources in the
boards file. This lets people easily select the specific pins/ports for
the normal UART as well as GPIOs for CTS/RTS.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Replace platfrom -> platform.
This is a frequent spelling bug.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
In blackfin, kgdb is running in delayed exception IRQ5 other than in
exception IRQ3 directly. Register reti other than retx in pt_regs is
the kgdb return address. So, don't put PC in gdb_regs into retx.
CC: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Blackfin needs it own arch specific probe_kernel_read() and
probe_kernel_write().
This was moved out of the kgdb code and into the
arch/blackfin/maccess.c, because it is a generic kernel api.
The arch specific kgdb.c for blackfin was cleaned of all functions
which exist in the kgdb core that do the same thing after resolving
the probe_kernel_read() and probe_kernel_write(). This also
eliminated the need for most of the #include's.
CC: Sonic Zhang <sonic.adi@gmail.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The current code will load the stack size and protection markings, but
then only use the markings in the MMU code path. The NOMMU code path
always passes PROT_EXEC to the mmap() call. While this doesn't matter
to most people whilst the code is running, it will cause a pointless
icache flush when starting every FDPIC application. Typically this
icache flush will be of a region on the order of 128KB in size, or may
be the entire icache, depending on the facilities available on the CPU.
In the case where the arch default behaviour seems to be desired
(EXSTACK_DEFAULT), we probe VM_STACK_FLAGS for VM_EXEC to determine
whether we should be setting PROT_EXEC or not.
For arches that support an MPU (Memory Protection Unit - an MMU without
the virtual mapping capability), setting PROT_EXEC or not will make an
important difference.
It should be noted that this change also affects the executability of
the brk region, since ELF-FDPIC has that share with the stack. However,
this is probably irrelevant as NOMMU programs aren't likely to use the
brk region, preferring instead allocation via mmap().
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for-33' of git://repo.or.cz/linux-kbuild: (29 commits)
net: fix for utsrelease.h moving to generated
gen_init_cpio: fixed fwrite warning
kbuild: fix make clean after mismerge
kbuild: generate modules.builtin
genksyms: properly consider EXPORT_UNUSED_SYMBOL{,_GPL}()
score: add asm/asm-offsets.h wrapper
unifdef: update to upstream revision 1.190
kbuild: specify absolute paths for cscope
kbuild: create include/generated in silentoldconfig
scripts/package: deb-pkg: use fakeroot if available
scripts/package: add KBUILD_PKG_ROOTCMD variable
scripts/package: tar-pkg: use tar --owner=root
Kbuild: clean up marker
net: add net_tstamp.h to headers_install
kbuild: move utsrelease.h to include/generated
kbuild: move autoconf.h to include/generated
drop explicit include of autoconf.h
kbuild: move compile.h to include/generated
kbuild: drop include/asm
kbuild: do not check for include/asm-$ARCH
...
Fixed non-conflicting clean merge of modpost.c as per comments from
Stephen Rothwell (modpost.c had grown an include of linux/autoconf.h
that needed to be changed to generated/autoconf.h)
* 'module' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
modpost: fix segfault with short symbol names
module: handle ppc64 relocating kcrctabs when CONFIG_RELOCATABLE=y
Kbuild: clear marker out of modpost
module: make MODULE_SYMBOL_PREFIX into a CONFIG option
ARM: unexport symbols used to implement floating point emulation
ARM: use unified discard definition in linker script
x86: don't export inline function
sparc64: don't export static inline pci_ functions
Currently all architectures but microblaze unconditionally define
USE_ELF_CORE_DUMP. The microblaze omission seems like an error to me, so
let's kill this ifdef and make sure we are the same everywhere.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: <linux-arch@vger.kernel.org>
Cc: Michal Simek <michal.simek@petalogix.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use the new unreachable() macro instead of for(;;);
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Commit a2e2725541 added recvmmsg to a bunch of arches (including the
Blackfin entry.S), but didn't actually add the new __NR_ define for it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The next commit will require the use of MODULE_SYMBOL_PREFIX in
.tmp_exports-asm.S. Currently it is mixed in with C structure
definitions in "asm/module.h". Move the definition of this arch option
into Kconfig, so it can be easily accessed by any code.
This also lets modpost.c use the same definition. Previously modpost
relied on a hardcoded list of architectures in mk_elfconfig.c.
A build test for blackfin, one of the two MODULE_SYMBOL_PREFIX archs,
showed the generated code was unchanged. vmlinux was identical save
for build ids, and an apparently randomized suffix on a single "__key"
symbol in the kallsyms data).
Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Mike Frysinger <vapier@gentoo.org> (blackfin)
CC: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
The Blackfin sched_clock() func is pretty much a duplicate of the common
version, so just punt it.
Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Normally there is no user-reserved memory after the DMA region which means
there is no user-reserved ICPLB coverage. So the DMA hole can be covered
by the large hole that is always added to cover up to the async bank. We
only need an explicit DMA whole when we also add an explicit mapping for
the user-reserved memory.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
- document simple global symbols
- convert printk to pr_*
- clean up spurious whitespace
- use min_t()
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The read_proc and write_proc interfaces are going to be removed in the
common kernel code.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The ADXL34x driver was updated to include orientation sensing, so have the
bf537-stamp use it by default.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The error masks are only needed in the BF537 demux error code, so instead
of needing all the short peripheral defines in global space, push these
masks into the one file where they are actually needed. This fixes a
bunch of define collisions with common code (can/serial/etc...).
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Barry Song <barry.song@analog.com>
When testing PREEMPT_RT kernel on BF561-EZKit, the kernel blocks while
booting. When the kernel initializes the ethernet driver, it sleeps and
never wakes up.
The issue happens when the kernel waits for a timer for Core B to timeout
(the timers are per-cpu based: static DEFINE_PER_CPU(struct tvec_base *,
tvec_bases) = &boot_tvec_bases).
However, the ksoftirqd thread for Core B (note, the ksoftirqd thread is
also per-cpu based) cannot work properly, and the timers for Core B never
times out.
When ksoftirqd() for the first time runs on core B, it is possible core A
is still initializing core B (see smp_init() -> cpu_up() -> __cpu_up()).
So the "cpu_is_offline()" check may return true and ksoftirqd moves to
"wait_to_die".
So delay the core b start up until the per-cpu timers have been set up
fully.
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
While fetching instructions at the boundary of L1 instruction SRAM, a false
External Memory Addressing Error might be triggered. We should ignore this
and continue on our way to avoid random crashes.
Because hardware errors are not exact in the Blackfin architecture, we need
to catch a few more common cases when the code flow changes and the signal
is finally delivered.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
These regions are either read-only and won't work anyways (bootrom), or
we don't want people screwing with them because they're shared between
all processes (fixed code).
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The NOMPU code already supported executing in the async banks, so this
brings the MPU code in line.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The point of this small chunk was to avoid anomaly 05000310. This never
really seemed to do what it was intended though -- no valid CPLBs exist
over the reserved memory, and there is often memory before it anyways (due
to the uClinux MTD and/or reserved DMA region). Plus, it doesn't address
the L1 instruction case.
So drop this chunk as it wastes memory and is affront to humanity.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When working with 8 meg systems, forcing a 1 meg DMA chunk heavily cuts
into the available resources. So support smaller chunks to better cover
needs for these systems.
Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
While we're moving the BF54x code, have the BF54xM variants select the
normal BF54x values so that the rest of the Kconfig tree doesn't need to
check the BF54xM variant everytime it wants to check the BF54x.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
No point in returning to userspace just to have it immediately perform the
RTS step. We have to update the PC anyways, so do the RTS too.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
I don't think these defines were ever used. At any rate, we have common
bit defines for all parts as well as a Kconfig option to declare the EBIU
async timings, and no one has really complained about this so far.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Barry Song
Mike Frysinger
Yi Li
Harald Krapfenbauer
Cliff Cai
Graf Yang
Roel Kluin
Jie Zhang
Sonic Zhang
Michael Hennerich
Valentin Yakovenkov
Jiri Kosina
Stefan Weil
Tejun Heo
Sonic Zhang
Jason Wessel
Linus Torvalds
Christoph Hellwig
David Daney
Alan Jenkins
Alexey Dobriyan