We plan to remove cpu_possible_map and cpu_present_map later and we
have proper init_cpu_possible() and init_cpu_present() APIs.
Therefore this patch rewrites platform_init_cpus and platform_prepare_cpus
by their APIs.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Both the BF548-EZKIT and the BF561-EZKIT use top boot flashes, so now
that Das U-Boot uses the last small sector for its environment, update
their nor layout in the kernel accordingly.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Turns out the documentation is wrong and doing "RAISE 1" does not result
in a software reset, only a core reset. So when the on-chip rom has a
functioning reset helper, use it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
These boards don't have AD1980 modules, and that device is deprecated,
so don't bother building it up by default anymore.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Since the value of these MMRs aren't changing, store the value in a local
variable and work off of that. This avoids multiple MMR reads which are
implicitly forced by the volatile markings.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The BF537 SIC combines the gpio port H mask A interrupts with the
emac rx interrupt, so we need to demux this in software.
It also combines the gpio port H mask B and the emac tx interrupts,
and the watchdog and port F mask B interrupts, but since we don't
support mask B yet, just add the defines for now.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The search logic in the gpio demux walks all possible gpio blocks starting
at the specified pin. The trouble on bf537 parts when we demux the port
F and port G mask A interrupts is that we also demux port H mask A ints.
Most of the time this isn't an issue as people don't usually use port H,
but might as well avoid it when possible.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This functionality was merged into the common bfin_pm_standby_ctrl func
some time ago, so punt these now unused funcs and data, and localize the
wake funcs that aren't needed externally anymore.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The SIC interrupt line muxing that the bf537 does is specific to this
CPU (thankfully), so rip it out of the common code and move it to a
bf537-specific file. This tidies up the common code significantly.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
These are only used in a few internal Blackfin places, so move the irq
prototypes out of the global header and into the internal irq one. No
functional changes other than shuffling locales.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Prefer MMR named checks over part-specific lists, condense duplicated
code across different #ifdef branches, simplify CONFIG_PM ifdefs, and
drop unused kgdb header.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Make sure we mark cache flushing as unsafe to kgdb in SMP mode so that
kgdb doesn't flush things incorrectly on us.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
After some cache setup reordering changesets, the blackfin_cpudata init
was left behind. While cpu0's data was correct, cpu1's data was not.
Not that big of a deal as these are only used in the cpuinfo output, but
should still be fixed. So move the setup of these fields to the common
cache setup function to avoid this happening again in the future.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The smp flush lines are too long and have too many newlines, so scale
them back to match the other lines.
The %p modifier shows "(null)" for 0, so use %08x instead.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Build the sound pieces that the board actually has into the kernel, and
punt older devices that we discourage.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
These files had a lot of whitespace damage, mostly due to copying and
pasting original files that had damage.
The BF561 header also had a lot of unused CONFIG_DEF_xxx defines, so
punt them all.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Start a new common IRQ header and move all of the CEC pieces there. This
lets the individual part headers worry just about its SIC defines.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Seems the ipipe code just copied & pasted the existing irq lookup logic,
so pull the logic out of do_irq() and into a local helper, and convert
the two users over to that.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The local ivg structs need not be exported, so mark them as static.
Further, the "num_spurious" variable is only incremented and never
actually read anywhere, so punt it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Since the on-chip L1 regions are not cacheable, there is no point in
trying to flush/invalidate them. Plus, older Blackfin parts like to
trigger an exception (like BF533-0.3).
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Convert to mtd_device_register() and remove the CONFIG_MTD_PARTITIONS
preprocessor conditionals as partitioning is always available.
Cc: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* 'for-2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu: Unify input section names
percpu: Avoid extra NOP in percpu_cmpxchg16b_double
percpu: Cast away printk format warning
percpu: Always align percpu output section to PAGE_SIZE
Fix up fairly trivial conflict in arch/x86/include/asm/percpu.h as per Tejun
* 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
clocksource: convert mips to generic i8253 clocksource
clocksource: convert x86 to generic i8253 clocksource
clocksource: convert footbridge to generic i8253 clocksource
clocksource: add common i8253 PIT clocksource
blackfin: convert to clocksource_register_hz
mips: convert to clocksource_register_hz/khz
sparc: convert to clocksource_register_hz/khz
alpha: convert to clocksource_register_hz
microblaze: convert to clocksource_register_hz/khz
ia64: convert to clocksource_register_hz/khz
x86: Convert remaining x86 clocksources to clocksource_register_hz/khz
Make clocksource name const
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (60 commits)
sched: Fix and optimise calculation of the weight-inverse
sched: Avoid going ahead if ->cpus_allowed is not changed
sched, rt: Update rq clock when unthrottling of an otherwise idle CPU
sched: Remove unused parameters from sched_fork() and wake_up_new_task()
sched: Shorten the construction of the span cpu mask of sched domain
sched: Wrap the 'cfs_rq->nr_spread_over' field with CONFIG_SCHED_DEBUG
sched: Remove unused 'this_best_prio arg' from balance_tasks()
sched: Remove noop in alloc_rt_sched_group()
sched: Get rid of lock_depth
sched: Remove obsolete comment from scheduler_tick()
sched: Fix sched_domain iterations vs. RCU
sched: Next buddy hint on sleep and preempt path
sched: Make set_*_buddy() work on non-task entities
sched: Remove need_migrate_task()
sched: Move the second half of ttwu() to the remote cpu
sched: Restructure ttwu() some more
sched: Rename ttwu_post_activation() to ttwu_do_wakeup()
sched: Remove rq argument from ttwu_stat()
sched: Remove rq->lock from the first half of ttwu()
sched: Drop rq->lock from sched_exec()
...
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Fix rt_rq runtime leakage bug
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: (34 commits)
PM: Introduce generic prepare and complete callbacks for subsystems
PM: Allow drivers to allocate memory from .prepare() callbacks safely
PM: Remove CONFIG_PM_VERBOSE
Revert "PM / Hibernate: Reduce autotuned default image size"
PM / Hibernate: Add sysfs knob to control size of memory for drivers
PM / Wakeup: Remove useless synchronize_rcu() call
kmod: always provide usermodehelper_disable()
PM / ACPI: Remove acpi_sleep=s4_nonvs
PM / Wakeup: Fix build warning related to the "wakeup" sysfs file
PM: Print a warning if firmware is requested when tasks are frozen
PM / Runtime: Rework runtime PM handling during driver removal
Freezer: Use SMP barriers
PM / Suspend: Do not ignore error codes returned by suspend_enter()
PM: Fix build issue in clock_ops.c for CONFIG_PM_RUNTIME unset
PM: Revert "driver core: platform_bus: allow runtime override of dev_pm_ops"
OMAP1 / PM: Use generic clock manipulation routines for runtime PM
PM: Remove sysdev suspend, resume and shutdown operations
PM / PowerPC: Use struct syscore_ops instead of sysdevs for PM
PM / UNICORE32: Use struct syscore_ops instead of sysdevs for PM
PM / AVR32: Use struct syscore_ops instead of sysdevs for PM
...
Conflicts:
arch/ia64/kernel/cyclone.c
arch/mips/kernel/i8253.c
arch/x86/kernel/i8253.c
Reason: Resolve conflicts so further cleanups do not conflict further
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
With dynamic debug having gained the capability to report debug messages
also during the boot process, it offers a far superior interface for
debug messages than the custom cpufreq infrastructure. As a first step,
remove the old cpufreq_debug_printk() function and replace it with a call
to the generic pr_debug() function.
How can dynamic debug be used on cpufreq? You need a kernel which has
CONFIG_DYNAMIC_DEBUG enabled.
To enabled debugging during runtime, mount debugfs and
$ echo -n 'module cpufreq +p' > /sys/kernel/debug/dynamic_debug/control
for debugging the complete "cpufreq" module. To achieve the same goal during
boot, append
ddebug_query="module cpufreq +p"
as a boot parameter to the kernel of your choice.
For more detailled instructions, please see
Documentation/dynamic-debug-howto.txt
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Dave Jones <davej@redhat.com>
Convert some Blackfin architecture's code to using struct syscore_ops
objects for power management instead of sysdev classes and sysdevs.
This simplifies the code and reduces the kernel's memory footprint.
It also is necessary for removing sysdevs from the kernel entirely in
the future.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
For future rework of try_to_wake_up() we'd like to push part of that
function onto the CPU the task is actually going to run on.
In order to do so we need a generic callback from the existing scheduler IPI.
This patch introduces such a generic callback: scheduler_ipi() and
implements it as a NOP.
BenH notes: PowerPC might use this IPI on offline CPUs under rare conditions!
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: Frank Rowand <frank.rowand@am.sony.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110405152728.744338123@chello.nl
The recent commit (10774912647781) wasn't entirely correct. While
it fixed some issues, it introduced others. So pull in the fixes
from the public cache flush functions, and document why we need to
call things directly ourselves.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
If the period of a gptimer is fairly low, we might miss an interrupt
by acking it too late (we end up acking the new int as well).
Reported-by: Isabelle Leonardi <i.leonardi@detracom.fr>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
We only want to clear the run bit for this one timer, not all status bits.
So don't read the whole reg and then write all the bits back out.
Reported-by: Isabelle Leonardi <i.leonardi@detracom.fr>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When suspending/resuming, the common task freezing code will run in
parallel and freeze processes on each core. This is because the code
uses the non-smp version of memory barriers (as well it should).
The Blackfin smp barrier logic at the moment contains the cache sync
logic, but the non-smp barriers do not. This is incorrect as Rafel
summarized:
> ...
> The existing memory barriers are SMP barriers too, but they are more
> than _just_ SMP barriers. At least that's how it is _supposed_ to be
> (eg. rmb() is supposed to be stronger than smp_rmb()).
> ...
> However, looking at the blackfin's definitions of SMP barriers I see
> that it uses extra stuff that should _also_ be used in the definitions
> of the mandatory barriers.
> ...
URL: http://lkml.org/lkml/2011/4/13/11
LKML-Reference: <BANLkTi=F-C-vwX4PGGfbkdTBw3OWL-twfg@mail.gmail.com>
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
avr32: Fix missing irq namespace conversion
powerpc: qe_ic: Rename get_irq_desc_data and get_irq_desc_chip
genirq: Remove the now obsolete config options and select statements
arm: versatile : Fix typo introduced in irq namespace cleanup
sound: Fixup the last user of the old irq functions
genirq: Remove obsolete comment
genirq: Remove now obsolete set_irq_wake()
sh: Fix irq cleanup fallout
x86: apb_timer: Fixup genirq fallout
genirq: Fix misnamed label in handle_edge_eoi_irq
Fix up crazy conflict in arch/powerpc/include/asm/qe_ic.h:
- commit eead4d5c63 ("powerpc: qe_ic: Rename get_irq_desc_data and
get_irq_desc_chip") made the helper functions use
irq_desc_get_handler_data() instead of the legacy (and no longer
existing) get_irq_desc_data.
- commit d4db35e8dc ("powerpc/qe_ic: Fix another breakage from the
irq_data conversion") used irq_desc_get_chip_data() instead.
According to Thomas, the former is the correct direct conversion, but it
does look like both should work (arch/powerpc/sysdev/qe_lib/qe_ic.c
seems to initialize both to the same thing), and the chip data in some
ways is the more logical. Somebody should really decide on one of the
other.
This merge picks irq_desc_get_handler_data() as the straightforward pure
conversion to new names, as per Thomas.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin:
Blackfin: bitops: fix include order after little endian inclusion
Blackfin: defconfigs: update after misc devices defaulted to N
Blackfin: use more standard pr_fmt in the module loader
Convert to the new function names. Scripted with coccinelle.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: uclinux-dist-devel@blackfin.uclinux.org
Use the trigger type in irq_data and check level type instead of
looking at desc->handle_irq.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: uclinux-dist-devel@blackfin.uclinux.org
The le.h header requires things like test_bit to be declared, so we need
to move its inclusion to after the point where that happens.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The default value for misc devices was changed from Y to N which
causes problems for mini defconfigs that were relying on this
defaulting to Y. So update all of the defconfigs accordingly.
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Changed pr_fmt(fmt) to make the format arguments match the format.
Changed an argument name in apply_relocate from me to mod so that
the pr_err is consistent with the other uses.
Added missing '\n' to a format.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Percpu allocator honors alignment request upto PAGE_SIZE and both the
percpu addresses in the percpu address space and the translated kernel
addresses should be aligned accordingly. The calculation of the
former depends on the alignment of percpu output section in the kernel
image.
The linker script macros PERCPU_VADDR() and PERCPU() are used to
define this output section and the latter takes @align parameter.
Several architectures are using @align smaller than PAGE_SIZE breaking
percpu memory alignment.
This patch removes @align parameter from PERCPU(), renames it to
PERCPU_SECTION() and makes it always align to PAGE_SIZE. While at it,
add PCPU_SETUP_BUG_ON() checks such that alignment problems are
reliably detected and remove percpu alignment comment recently added
in workqueue.c as the condition would trigger BUG way before reaching
there.
For um, this patch raises the alignment of percpu area. As the area
is in .init, there shouldn't be any noticeable difference.
This problem was discovered by David Howells while debugging boot
failure on mn10300.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Cc: uclinux-dist-devel@blackfin.uclinux.org
Cc: David Howells <dhowells@redhat.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: user-mode-linux-devel@lists.sourceforge.net
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin:
Blackfin: bf54x: re-enable anomaly 05000353 for all revs
Blackfin: enable atomic64_t support
Blackfin: wire up new syncfs syscall
Blackfin: SMP: flush CoreB cache when shutting down
minix bit operations are only used by minix filesystem and useless by
other modules. Because byte order of inode and block bitmaps is different
on each architecture like below:
m68k:
big-endian 16bit indexed bitmaps
h8300, microblaze, s390, sparc, m68knommu:
big-endian 32 or 64bit indexed bitmaps
m32r, mips, sh, xtensa:
big-endian 32 or 64bit indexed bitmaps for big-endian mode
little-endian bitmaps for little-endian mode
Others:
little-endian bitmaps
In order to move minix bit operations from asm/bitops.h to architecture
independent code in minix filesystem, this provides two config options.
CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED is only selected by m68k.
CONFIG_MINIX_FS_NATIVE_ENDIAN is selected by the architectures which use
native byte order bitmaps (h8300, microblaze, s390, sparc, m68knommu,
m32r, mips, sh, xtensa). The architectures which always use little-endian
bitmaps do not select these options.
Finally, we can remove minix bit operations from asm/bitops.h for all
architectures.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Michal Simek <monstr@monstr.eu>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
As the result of conversions, there are no users of ext2 non-atomic bit
operations except for ext2 filesystem itself. Now we can put them into
architecture independent code in ext2 filesystem, and remove from
asm/bitops.h for all architectures.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Introduce little-endian bit operations to the big-endian architectures
which do not have native little-endian bit operations and the
little-endian architectures. (alpha, avr32, blackfin, cris, frv, h8300,
ia64, m32r, mips, mn10300, parisc, sh, sparc, tile, x86, xtensa)
These architectures can just include generic implementation
(asm-generic/bitops/le.h).
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Matthew Wilcox <willy@debian.org>
Cc: Grant Grundler <grundler@parisc-linux.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Even though the anomaly sheet says that the the bootrom is fixed, tests
have shown that the fix itself does not handle all cases. So until we
get a ROM update, assume the reset code is still broken and we need to
handle things ourselves.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When CoreB wakes up, it needs to read variables that CoreA might have
modified, and might be in CoreB's cache. So kill CoreB's cache before
going to sleep so that when we wake up, we are in a coherent state.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The previous commit that changed this code to the common GPIO layers
forgot to delete the local and now unused "i" variable.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
No code uses these, and the short define names are polluting the global
namespace where they collide with things like common irq files. So just
punt the damned things. If in the future we need HDMA support, we can
make a standalone header for these things.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This patch fixes the Blackfin irqflags to make them I-pipe aware anew,
after the introduction of the hard_local_irq_*() API.
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This patch makes sure to sync the pipeline for the root stage only
from the outer interrupt level, when resuming kernel code after an
interrupt.
This fixes a bug causing EVT15 to be spuriously popped off upon nested
interrupts, which in turn would cause the preempted kernel code to
resume without supervisor privileges.
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This patch introduces Blackfin-specific bits to support the current
tip of the interrupt pipeline development, mainly:
- 2/3-level interrupt maps (sparse IRQs)
- generic virq handling
- sysinfo v2 format for ipipe_get_sysinfo()
Signed-off-by: Philippe Gerum <rpm@xenomai.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Fixup the open coded access to irq_desc and use the proper wrappers.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
In order to safely work around anomaly 05000491, we have to execute IFLUSH
from L1 instruction sram. The trouble with multi-core systems is that all
L1 sram is visible only to the active core. So we can't just place the
functions into L1 and call it directly. We need to setup a jump table and
place the entry point in external memory. This will call the right func
based on the active core.
In the process, convert from the manual relocation of a small bit of code
into Core B's L1 to the more general framework we already have in place
for loading arbitrary pieces of code into L1.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Re-use some of the existing cpu hotplugging code in the process.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
We need to place icache flush funcs into L1 inst sram to work around a
hardware anomaly. But this currently breaks SMP support as the L1 inst
sram is per-core and cannot be called directly. So in preparation for
making that work, split the two options.
Further, split out the SMP depend so that we can allow some for SMP.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The smp_processor_id() API requires that preempt be disabled when calling
it, so make sure it is when we go to send messages to other processors.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Defer bfin_setup_caches(cpu) to avoid unexpected faults due to the cpu
state not yet being fully initialized.
Signed-off-by: steven miao <realmz6@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Common code checks the alignment of some of the variables and calls BUG()
if they aren't page aligned.
Signed-off-by: steven miao <realmz6@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Common code no longer defines this, so stop using it.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The board doesn't actually have a pin hooked up to do card detection,
so punt the code for it.
Signed-off-by: Andreas Schallenberg <Andreas.Schallenberg@3alitydigital.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The BF54x lacks dedicated DMA channels for the UART peripherals and need
to be muxed between others. So add a kconfig option so people can select
which channels the UARTs will use so they can pick between SPORTs and the
less commonly used EPPI/PIXC peripherals.
Signed-off-by: steven miao <realmz6@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Since coreb_trampoline_start() calls coreb_start(), they need to be in
the same section.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* 'for-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu, x86: Add arch-specific this_cpu_cmpxchg_double() support
percpu: Generic support for this_cpu_cmpxchg_double()
alpha: use L1_CACHE_BYTES for cacheline size in the linker script
percpu: align percpu readmostly subsection to cacheline
Fix up trivial conflict in arch/x86/kernel/vmlinux.lds.S due to the
percpu alignment having changed ("x86: Reduce back the alignment of the
per-CPU data section")
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (62 commits)
posix-clocks: Check write permissions in posix syscalls
hrtimer: Remove empty hrtimer_init_hres_timer()
hrtimer: Update hrtimer->state documentation
hrtimer: Update base[CLOCK_BOOTTIME].offset correctly
timers: Export CLOCK_BOOTTIME via the posix timers interface
timers: Add CLOCK_BOOTTIME hrtimer base
time: Extend get_xtime_and_monotonic_offset() to also return sleep
time: Introduce get_monotonic_boottime and ktime_get_boottime
hrtimers: extend hrtimer base code to handle more then 2 clockids
ntp: Remove redundant and incorrect parameter check
mn10300: Switch do_timer() to xtimer_update()
posix clocks: Introduce dynamic clocks
posix-timers: Cleanup namespace
posix-timers: Add support for fd based clocks
x86: Add clock_adjtime for x86
posix-timers: Introduce a syscall for clock tuning.
time: Splitout compat timex accessors
ntp: Add ADJ_SETOFFSET mode bit
time: Introduce timekeeping_inject_offset
posix-timer: Update comment
...
Fix up new system-call-related conflicts in
arch/x86/ia32/ia32entry.S
arch/x86/include/asm/unistd_32.h
arch/x86/include/asm/unistd_64.h
arch/x86/kernel/syscall_table_32.S
(name_to_handle_at()/open_by_handle_at() vs clock_adjtime()), and some
due to movement of get_jiffies_64() in:
kernel/time.c
Some devices will use the outs* funcs with a length of zero, so make sure
we do not write any data in that case.
Reported-by: Gilbert Inho <gneny@edevice.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This converts the blackfin clocksource to use clocksource_register_hz.
CC: Mike Frysinger <vapier@gentoo.org>
CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <johnstul@us.ibm.com>
The RX lock is used to protect the RX buffer from concurrent access in DMA
mode between the timer and RX interrupt routines. It is independent from
the uart lock which is used to protect the TX buffer. It is possible for
a uart TX transfer to be started up from the RX interrupt handler if low
latency is enabled. So we need to split the locks to avoid deadlocking in
this situation.
In PIO mode, the RX lock is not necessary because the handle_simple_irq
and handle_level_irq functions ensure driver interrupt handlers are called
once on one core.
And now that the RX path has its own lock, the TX interrupt has nothing to
do with the RX path, so disabling it at the same time.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Currently percpu readmostly subsection may share cachelines with other
percpu subsections which may result in unnecessary cacheline bounce
and performance degradation.
This patch adds @cacheline parameter to PERCPU() and PERCPU_VADDR()
linker macros, makes each arch linker scripts specify its cacheline
size and use it to align percpu subsections.
This is based on Shaohua's x86 only patch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Shaohua Li <shaohua.li@intel.com>
All architectures are finally converted. Remove the cruft.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Michal Simek <monstr@monstr.eu>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Jeff Dike <jdike@addtoit.com>
The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
is used to configure any non-standard kernel with a much larger scope than
only small devices.
This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
references to the option throughout the kernel. A new CONFIG_EMBEDDED
option is added that automatically selects CONFIG_EXPERT when enabled and
can be used in the future to isolate options that should only be
considered for embedded systems (RISC architectures, SLOB, etc).
Calling the option "EXPERT" more accurately represents its intention: only
expert users who understand the impact of the configuration changes they
are making should enable it.
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: David Woodhouse <david.woodhouse@intel.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Greg KH <gregkh@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Robin Holt <holt@sgi.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Encoding the cpu family name apparently confuses people when they try to
boot an image on a sub-variant, so encode the specific cpu name and the
silicon rev instead.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When unmasking a GPIO interrupt on a BF54x part, the code will implicitly
ack any pending interrupts. This is not what unmasking should do and can
cause people to miss interrupts from their devices, so punt the code.
Reported-by: Rutger Hofman <rutger@cs.vu.nl>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
If there was an error in the lower free functions, we need to pass that
back up so the calling process is able to check things.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
On bf518-ezbrd with DSA Ethernet switch enabled, on chip MAC is
connecting to phy at address 3. If allowing the netdevice framework to
probe both 3 phys of the switch when registering MAC phy, phy at address
1 is checked for link active status other than phy at address 3. If
connecting a cable to port 2 and leave port 1 open, link status in phy
2 and 3 are online, while that in phy 1 is offline. So, the phy layer
sets wrong offline status to net device on port 3. In this case, no data
can be transferred via ethernet port 2.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Common code now invokes the linker directly which causes build failures
when using an FDPIC toolchain. So move the emulation setting out of the
module-specific LDFLAGS and into the common LDFLAGS.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
We check its value at runtime, so we want to avoid garbage across runs.
Signed-off-by: Vivi Li <vivi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Otherwise, gdb continue operation after a breakpoint is hit may trap
into endless breakpoint.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When ADEOS and kgdb are both enabled, single step in linux kernel may be
scheduled to Xenomai core after return from interrupt handlers. This
blocks gdb continue operation after a break point is hit. So, disable
interrupt when running gdb single step.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When run kgdb testing, it looks like coreb hangs in single step or trap
exception without handling anomaly 05000257 properly on bf561 v0.5. But,
the anomaly list says it apply to bf561 v0.4 and bellow. Apply its work
around to 0.5 temporarily until the behavior and the root cause can be
confirmed by the hardware team.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The low level assembly needs to use the pseudo_long_call helper so that
we use the right call insn when doing kernel XIP.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
KGDB single step in SMP kernel may hang forever in flushinv without a
CSYNC ahead. This is because the core internal write buffers need to
be flushed before invalidating the data cache to make sure the insn
fetch is not out of sync.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The SPORT/UART driver doesn't use the secondary channel pins, so don't
try and request them thus keeping other drivers from using them.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
platfrom -> platform
This changes a struct name. The related code is conditionally
compiled and won't work because the include file linux/gpio-decoder.h
is missing, so removing this code would be an even better solution.
If the missing include file is added, it must fix the spelling, too.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
When using an uncached DMA region less than 1 MiB, we try to mask off
the whole last 1 MiB for it. Unfortunately, this fails as we forgot
to subtract one from the calculated mask, leading to the region still
be marked as cacheable.
Reported-by: Andrew Rook <andrew.rook@speakerbus.co.uk>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Since linux-2.6.31, the kernel suspend framework will do disable_irq/enable_irq,
so save/restore irq in standby and suspend to mem callback should be dropped.
Otherwise the common code notices things are enabled and complains.
Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Any consumer of dpmc.h expects to use VR_CTL, so also pull in the new
mach/pll.h header for those functions.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Currently, sending an interprocessor interrupt (IPI) requires building up
a message dynamically which means memory allocation. But often times, we
will want to send an IPI in low level contexts where allocation is not
possible which may lead to a panic(). So create a per-cpu static array
for the message queue and use that instead.
Further, while we have two supplemental interrupts, we are currently only
using one of them. So use the second one for the most common IPI message
of all -- smp_send_reschedule(). This avoids ugly contention for locks
which in turn would require an IPI message ...
In general, this improves SMP performance, and in some cases allows the
SMP port to work in places it wouldn't before. Such as the PREEMPT_RT
state where the slab is protected by a per-cpu spin lock. If the slab
kmalloc/kfree were to put the task to sleep, and that task was actually
the IPI handler, then the system falls down yet again.
After running some various stress tests on the system, the static limit
of 5 messages seems to work. On the off chance even this overflows, we
simply panic(), and we can review that scenario to see if the limit needs
to be increased a bit more.
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Since we're breaking apart some inter-header dependencies to avoid more
circular loops, move the blackfin_core_id() definition to the func that
it is based upon.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Common code expects these to be defined for SMP ports, so add them.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The BF561 mem_map.h header has the __ASSEMBLY__/CONFIG_SMP checks out
of order which leads to build errors for assembly code that happens to
include this file.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This function takes an irq_handler_t function, but the prototype in
the header doesn't match the function definition. This is due to the
smp headers needing to avoid circular dependencies. So change the
function to take a simple pointer.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The common asm-generic non-atomic bitops.h defines test_bit() for us, but
we need to use our own version. So redirect the definition of this func
to avoid having to inline the rest of the asm-generic file.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The cpu maps are defines provided by common linux/cpumask.h, not local
variables. So stop exporting them locally and include the right header
for their definition.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The external functions are named __raw_xxx, not arch_xxx, so rename the
prototypes to match reality. This fixes some simple build errors in the
bfin_ksyms.c code which exports these helpers to modules.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Rather than maintain Kconfig entries where people have to enter raw
numbers and hardcode lists of addresses/pins in the driver itself,
push it all to platform resources. This lets us simplify the driver,
the Kconfig, and gives board porters greater flexibility.
In the process, we need to also start supporting the early platform
interface. Not a big deal, but it causes the patch to be bigger than
a simple resource relocation.
All the Blackfin boards already have their resources updated and in
place for this change.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
These were only included because of the irq handling of the PLL funcs,
and those PLL funcs have been moved out into their own header now.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The defBF512.h header exists only to include defBF51x_base.h, and it is
the only place where defBF51x_base.h is included. So move the contents
of the defBF51x_base.h header into the defBF512.h header.
Same situation for the other def/cdef pairs.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The main asm/blackfin.h header will pull in mach/blackfin.h to get
all the fun Blackfin defines. So having any of the sub-mach headers
trying to include asm/blackfin.h makes no sense -- punt it.
The mach/blackfin.h header takes care of including the part-specific
def headers which in turn will include any other needed def file.
Similarly, it takes care of pulling in the part-specific cdef header.
So move this logic out of the blackfin.h when necessary.
Further, make sure the cdef headers do not waste time including the
def headers again.
Since all parts need the common def/cdef headers, move this logic
out of the part-specific headers and into the mach/blackfin.h file.
Finally, we need to split the BF539 def header since the BF538 does
not have MXVR and we don't want to expose those MMRs.
So now all parts should have the same behavior:
mach/blackfin.h
asm/def_LPBlackfin.h
part-specific def.h
if ! asm
asm/cdef_LPBlackfin.h
part-specific cdef.h
And the sub def/cdef headers only tail into what they need.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
We don't want the BF533 to be different in terms of its MMR headers, so
merge the FIO_FLAG helpers back into the normal place. To avoid circular
dependencies with headers, turn the inline C funcs into CPP defines. Not
like there will be any code size differences.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Since the SMP code paths tend to compile fail a lot, start a SMP defconfig
so our nightly build tools will automatically test it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
We don't want people banging on MMRs directly. As for the ip0x board,
it shouldn't need to muck with the CS pin directly as the Blackfin SPI
bus master driver takes care of driving this.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Use the same naming convention for DMA traffic MMRs (most were legacy
anyways) so we can avoid useless ifdef trees.
Same goes for MDMA names -- this actually allows us to undo a bunch of
ifdef redirects that existed for this purpose alone.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
A bunch of arches define reads[bwl]/writes[bwl] helpers for accessing
memory mapped registers. Since the Blackfin ones aren't specific to
Blackfin code, move them to the common asm-generic/io.h for people.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
KOSAKI Motohiro