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2011-02-19ARM: 6743/1: errata: interrupted ICALLUIS may prevent completion of ↵Will Deacon1-0/+10
broadcasted operation On versions of the Cortex-A9 prior to r3p0, an interrupted ICIALLUIS operation may prevent the completion of a following broadcasted operation if the second operation is received by a CPU before the ICIALLUIS has completed, potentially leading to corrupted entries in the cache or TLB. This workaround sets a bit in the diagnostic register of the Cortex-A9, causing CP15 maintenance operations to be uninterruptible. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-19ARM: 6741/1: errata: pl310 cache sync operation may be faultySrinidhi Kasagar1-0/+15
The effect of cache sync operation is to drain the store buffer and wait for all internal buffers to be empty. In normal conditions, store buffer is able to merge the normal memory writes within its 32-byte data buffers. Due to this erratum present in r3p0, the effect of cache sync operation on the store buffer still remains when the operation completes. This means that the store buffer is always asked to drain and this prevents it from merging any further writes. This can severely affect performance on the write traffic esp. on Normal memory NC one. The proposed workaround is to replace the normal offset of cache sync operation(0x730) by another offset targeting an unmapped PL310 register 0x740. Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-12ARM: 6659/1: Thumb-2: Make CONFIG_OABI_COMPAT depend on !CONFIG_THUMB2_KERNELDave Martin1-1/+1
rmk says: "You might as well make OABI_COMPAT depend on !THUMB2_KERNEL. OABI userland is useless without FPA support." nwfpe doesn't work with Thumb-2 anyway and will probably never get ported, so I can't argue with that. This patch implements the dependency change. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-01-15Merge branch 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds1-17/+4
* 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm: (161 commits) ARM: pxa: fix building issue of missing physmap.h ARM: mmp: PXA910 drive strength FAST using wrong value ARM: mmp: MMP2 drive strength FAST using wrong value ARM: pxa: fix recursive calls in pxa_low_gpio_chip AT91: Support for gsia18s board AT91: Acme Systems FOX Board G20 board files AT91: board-sam9m10g45ek.c: Remove duplicate inclusion of mach/hardware.h ARM: pxa: fix suspend/resume array index miscalculation ARM: pxa: use cpu_has_ipr() consistently in irq.c ARM: pxa: remove unused variable in clock-pxa3xx.c ARM: pxa: fix warning in zeus.c ARM: sa1111: fix typo in sa1111_retrigger_lowirq() ARM mxs: clkdev related compile fixes ARM i.MX mx31_3ds: Fix MC13783 regulator names ARM: plat-stmp3xxx: irq_data conversion. ARM: plat-spear: irq_data conversion. ARM: plat-orion: irq_data conversion. ARM: plat-omap: irq_data conversion. ARM: plat-nomadik: irq_data conversion. ARM: plat-mxc: irq_data conversion. ... Fix up trivial conflict in arch/arm/plat-omap/gpio.c (Lennert Buytenhek's irq_data conversion clashing with some omap irq updates)
2011-01-15Merge branch 'fixes' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds1-1/+1
* 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm: ARM: fix missing branch in __error_a ARM: fix /proc/$PID/stack on SMP ARM: Fix build regression on SA11x0, PXA, and H720x targets ARM: 6625/1: use memblock memory regions for "System RAM" I/O resources ARM: fix wrongly patched constants ARM: 6624/1: fix dependency for CONFIG_SMP_ON_UP ARM: 6623/1: Thumb-2: Fix out-of-range offset for Thumb-2 in proc-v7.S ARM: 6622/1: fix dma_unmap_sg() documentation ARM: 6621/1: bitops: remove condition code clobber for CLZ ARM: 6620/1: Change misleading warning when CONFIG_CMDLINE_FORCE is used ARM: 6619/1: nommu: avoid mapping vectors page when !CONFIG_MMU ARM: sched_clock: make minsec argument to clocks_calc_mult_shift() zero ARM: sched_clock: allow init_sched_clock() to be called early ARM: integrator: fix compile warning in cpu.c ARM: 6616/1: Fix ep93xx-fb init/exit annotations ARM: twd: fix display of twd frequency ARM: udelay: prevent math rounding resulting in short udelays
2011-01-15Merge branch 'for-rmk' of ↵Russell King1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable
2011-01-14Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into ↵Russell King1-1/+1
devel-stable
2011-01-14ARM mxs: clkdev related compile fixesSascha Hauer1-1/+1
Since commit 6d803ba (ARM: 6483/1: arm & sh: factorised duplicated clkdev.c) platforms need to select CLKDEV_LOOKUP instead of COMMON_CLKDEV and need to include <linux/clkdev.h>. Cc: Shawn Guo <shawn.guo@freescale.com> Cc: Lothar Waßmann <LW@KARO-electronics.de> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-01-14ARM: 6624/1: fix dependency for CONFIG_SMP_ON_UPNicolas Pitre1-1/+1
This depends on !XIP_KERNEL and not !XIP. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-01-13ARM: Use genirq definitions from kernel/irq/Kconfig.Lennert Buytenhek1-16/+2
Signed-off-by: Lennert Buytenhek <buytenh@secretlab.ca>
2011-01-07Merge branch 'rmobile/smp' into rmobile-latestPaul Mundt1-1/+1
Conflicts: arch/arm/Kconfig arch/arm/mach-shmobile/include/mach/entry-macro-intc.S Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-01-07ARM: mach-shmobile: Enable CONFIG_MULTI_IRQ_HANDLERMagnus Damm1-0/+1
Always enable MULTI_IRQ_HANDLER on SH-Mobile. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-01-07Merge branch 'master' of ↵Paul Mundt1-33/+95
master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 into rmobile-latest Conflicts: arch/arm/mach-shmobile/Kconfig Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-01-07Merge branch 'devel-stable' into develRussell King1-2/+13
Conflicts: arch/arm/mach-pxa/clock.c arch/arm/mach-pxa/clock.h
2011-01-07Merge branch 'misc' into develRussell King1-26/+39
Conflicts: arch/arm/Kconfig arch/arm/common/Makefile arch/arm/kernel/Makefile arch/arm/kernel/smp.c
2011-01-07Merge branch 'smp' into miscRussell King1-18/+19
Conflicts: arch/arm/kernel/entry-armv.S arch/arm/mm/ioremap.c
2011-01-07ARM: DMA: add support for DMA debuggingRussell King1-0/+1
Add ARM support for the DMA debug infrastructure, which allows the DMA API usage to be debugged. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-01-05Merge branch 'clksrc' into develRussell King1-4/+22
Conflicts: arch/arm/mach-vexpress/v2m.c arch/arm/plat-omap/counter_32k.c arch/arm/plat-versatile/Makefile
2011-01-05Merge branches 'ftrace', 'gic', 'io', 'kexec', 'mod', 'sa11x0', 'sh' and ↵Russell King1-1/+21
'versatile' into devel
2011-01-05ARM: vexpress: add sched_clock() for Versatile ExpressRussell King1-0/+1
Add a sched_clock() implementation to Versatile Express using the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-01-05Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into ↵Russell King1-0/+10
devel-stable
2011-01-03Merge branch 'ux500-core' of ↵Russell King1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson into devel-stable
2011-01-02ARM: TWD: enable one-shot modeRussell King1-0/+1
Allow one shot timer mode to be used with the TWD. This allows NOHZ mode to be used on SMP systems using the TWD localtimer. Tested on Versatile Express and U8500. Tested-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-24ARM: 6532/1: Allow machine to specify it's own IRQ handlers at run-timeeric miao1-0/+5
Normally different ARM platform has different way to decode the IRQ hardware status and demultiplex to the corresponding IRQ handler. This is highly optimized by macro irq_handler in entry-armv.S, and each machine defines their own macro to decode the IRQ number. However, this prevents multiple machine classes to be built into a single kernel. By allowing each machine to specify thier own handler, and making function pointer 'handle_arch_irq' to point to it at run time, this can be solved. And introduce CONFIG_MULTI_IRQ_HANDLER to allow both solutions to work. Comparing with the highly optimized macro of irq_handler, the new function must be written with care not to lose too much performance. And the IPI stuff on SMP is expected to move to the provided arch IRQ handler as well. The assembly code to invoke handle_arch_irq is optimized by Russell King. Signed-off-by: Eric Miao <eric.miao@canonical.com> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: S5PV310: Update Kconfig and Makefile for supporting CPUFREQSunyoung Kang1-0/+1
This patch adds ARCH_HAS_CPUFREQ in Kconfig of ARCH_S5PV310 and updates Makefile for supporting build S5PV310 CPUFREQ driver. Signed-off-by: Sunyoung Kang <sy0816.kang@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2010-12-23Merge branch 'devel' of ↵Russell King1-5/+5
git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 into devel-stable
2010-12-23ARM: versatile: convert sched_clock() to use new infrastructureRussell King1-0/+2
Convert versatile platforms to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: orion: convert sched_clock() to use new infrastructureRussell King1-0/+1
Convert orion platforms to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: omap: convert sched_clock() to use new infrastructureRussell King1-0/+1
Convert omap to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: iop: convert sched_clock() to use new infrastructureRussell King1-0/+1
Convert iop platforms to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: u300: convert sched_clock() to use new infrastructureRussell King1-0/+1
Convert u300 to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: tegra: convert sched_clock() to use new infrastructureRussell King1-0/+1
Convert tegra to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Olof Johansson <olof@lixom.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: sa1100: convert sched_clock() to use new infrastructureRussell King1-0/+1
Convert sa1100 to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: pxa: convert sched_clock() to use new infrastructureRussell King1-0/+1
Convert pxa to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: mmp: convert sched_clock() to use new infrastructureRussell King1-0/+1
Convert mmp to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: ixp4xx: convert sched_clock() to use new infrastructureRussell King1-0/+1
Convert ixp4xx to use the new sched_clock() infrastructure for extending 32bit counters to full 64-bit nanoseconds. Tested-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-23ARM: sched_clock: provide common infrastructure for sched_clock()Russell King1-0/+3
Provide common sched_clock() infrastructure for platforms to use to create a 64-bit ns based sched_clock() implementation from a counter running at a non-variable clock rate. This implementation is based upon maintaining an epoch for the counter and an epoch for the nanosecond time. When we desire a sched_clock() time, we calculate the number of counter ticks since the last epoch update, convert this to nanoseconds and add to the epoch nanoseconds. We regularly refresh these epochs within the counter wrap interval. We perform a similar calculation as above, and store the new epochs. We read and write the epochs in such a way that sched_clock() can easily (and locklessly) detect when an update is in progress, and repeat the loading of these constants when they're known not to be stable. The one caveat is that sched_clock() is not called in the middle of an update. We achieve that by disabling IRQs. Finally, if the clock rate is known at compile time, the counter to ns conversion factors can be specified, allowing sched_clock() to be tightly optimized. We ensure that these factors are correct by providing an initialization function which performs a run-time check. Acked-by: Peter Zijlstra <peterz@infradead.org> Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Tested-by: Will Deacon <will.deacon@arm.com> Tested-by: Mikael Pettersson <mikpe@it.uu.se> Tested-by: Eric Miao <eric.y.miao@gmail.com> Tested-by: Olof Johansson <olof@lixom.net> Tested-by: Jamie Iles <jamie@jamieiles.com> Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-21ARM: 6459/2: sa1100: Add nanoEngine PCI support.Marcelo Roberto Jimenez1-1/+7
This patch adds nanoEngine's PCI support. Signed-off-by: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-20ARM: mxs: Add build configuration for mxsShawn Guo1-0/+10
Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
2010-12-20Merge branch 'rmobile/urgent' into rmobile-latestPaul Mundt1-3/+3
Conflicts: arch/arm/mach-shmobile/include/mach/entry-macro.S Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-20ARM: 6516/1: Allow SMP_ON_UP to work with Thumb-2 kernels.Dave Martin1-1/+1
* __fixup_smp_on_up has been modified with support for the THUMB2_KERNEL case. For THUMB2_KERNEL only, fixups are split into halfwords in case of misalignment, since we can't rely on unaligned accesses working before turning the MMU on. No attempt is made to optimise the aligned case, since the number of fixups is typically small, and it seems best to keep the code as simple as possible. * Add a rotate in the fixup_smp code in order to support CPU_BIG_ENDIAN, as suggested by Nicolas Pitre. * Add an assembly-time sanity-check to ALT_UP() to ensure that the content really is the right size (4 bytes). (No check is done for ALT_SMP(). Possibly, this could be fixed by splitting the two uses ot ALT_SMP() (ALT_SMP...SMP_UP versus ALT_SMP...SMP_UP_B) into two macros. In the first case, ALT_SMP needs to expand to >= 4 bytes, not == 4.) * smp_mpidr.h (which implements ALT_SMP()/ALT_UP() manually due to macro limitations) has not been modified: the affected instruction (mov) has no 16-bit encoding, so the correct instruction size is satisfied in this case. * A "mode" parameter has been added to smp_dmb: smp_dmb arm @ assumes 4-byte instructions (for ARM code, e.g. kuser) smp_dmb @ uses W() to ensure 4-byte instructions for ALT_SMP() This avoids assembly failures due to use of W() inside smp_dmb, when assembling pure-ARM code in the vectors page. There might be a better way to achieve this. * Kconfig: make SMP_ON_UP depend on (!THUMB2_KERNEL || !BIG_ENDIAN) i.e., THUMB2_KERNEL is now supported, but only if !BIG_ENDIAN (The fixup code for Thumb-2 currently assumes little-endian order.) Tested using a single generic realview kernel on: ARM RealView PB-A8 (CONFIG_THUMB2_KERNEL={n,y}) ARM RealView PBX-A9 (SMP) Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-20ARM: pxa: add iwmmx support for PJ4Haojian Zhuang1-2/+2
iwmmxt is used in XScale, XScale3, Mohawk and PJ4 core. But the instructions of accessing CP0 and CP1 is changed in PJ4. Append more files to support iwmmxt in PJ4 core. Signed-off-by: Zhou Zhu <zzhu3@marvell.com> Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com> Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
2010-12-15ARM: 6534/1: Make CONFIG_FPE_NWFPE depend on !CONFIG_THUMB2_KERNELDave Martin1-1/+1
Because the nwfpe support is unlikely to be used on new platforms and requires CONFIG_OABI_COMPAT, which is not generally used with ARMv7+, we shouldn't expect to build nwfpe support into a Thumb-2 kernel. At present, nwfpe contains assembly code which isn't Thumb-2 compatible, and for now it doesn't appear useful to port this code. All ARMv7-A/R platforms necessarily have VFPv3 hardware floating- point natively, making emulation unnecessary. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-15ARM: 6533/1: Thumb-2: Make CONFIG_THUMB2_KERNEL depend on !CPU_V6Dave Martin1-1/+1
This makes sense, because Thumb-2 code can't execute on plain ARMv6 processors. This will avoid accidentally configuring a broken kernel where the config otherwise would allow multiple architecture versions to coexist in the same kernel. Not adding !CPU_V5 etc., because the chance of anyone trying to put v5 and v7 in the same kernel is low, and I'm not aware of any mach which can do this. These could be added later if it matters. Note that the rules may need to be refined if support for the ARM1156J(F)-S processor is later added to the kernel, since this processor supports the rare ARMv6T2 extensions, which add support for Thumb-2 and a few other ARMv7 features. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-14ARM: mach-shmobile: Enable SMP supportMagnus Damm1-1/+2
Allow SMP to be enabled on R-Mobile / SH-Mobile. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-12-09ux500: Add cpufreq support for u8500Martin Persson1-0/+1
Signed-off-by: Martin Persson <martin.persson@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
2010-12-06ARM: Ensure experimental options are so markedRussell King1-3/+4
It is kernel-wide policy that options depending on EXPERIMENTAL should also have '(EXPERIMENTAL)' in their option text, and options with '(EXPERIMENTAL)' depend on EXPERIMENTAL. Ensure that all ARM options comply with this. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-05ARM: 6520/1: Kconfig: add new symbol MIGHT_HAVE_PCIHans Ulli Kroll1-1/+6
Today more boards with arm cpu have selectable pci bus. This patch makes this more scalable and remove line continuations in Kconfig Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Hans Ulli Kroll <ulli.kroll@googlemail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-04ARM: 6511/1: ftrace: add ARM support for C version of recordmcountRabin Vincent1-0/+1
Depending on the compiler version, ARM GCC calls the mcount function either __gnu_mcount_nc or mcount. Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-11-30ARM: 6505/1: kprobes: Don't HAVE_KPROBES when CONFIG_THUMB2_KERNEL is selectedDave Martin1-1/+1
Currently, the kprobes implementation for ARM only supports the ARM instruction set, so it only works if CONFIG_THUMB2_KERNEL is not enabled. Until kprobes is updated to work with Thumb-2, turning it on will cause horrible things to happen, so this patch disables it for now. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>