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2011-07-02ARM: entry: data abort: avoid using r2 in abort helpersRussell King6-33/+33
This allows us to pass the pt_regs pointer in to these functions ready for tail-calling the abort handler. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-02ARM: entry: data abort: arrange for CPU abort helpers to take pc/psr in r4/r5Russell King10-46/+38
Re-jig the CPU abort helpers to take the PC/PSR in r4/r5 rather than r2/r3. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-02ARM: entry: prefetch abort: tail-call the main prefetch abort handlerRussell King4-18/+19
Tail-call the main C prefetch abort handler code from the per-CPU helper code. Also note that the helper function becomes ABI compliant in terms of the registers preserved. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-02ARM: entry: re-allocate registers in irq entry assembly macrosRussell King2-12/+12
This avoids the irq entry assembly corrupting r5, thereby allowing it to be preserved through to the svc exit code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-02ARM: entry: consolidate trace_hardirqs_off into (svc|usr)_entry macrosRussell King1-39/+8
All handlers now call trace_hardirqs_off, so move this common code into the (svc|usr)_entry assembler macros. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-02ARM: entry: instrument usr exception handlers with irqsoff tracingRussell King1-1/+16
As we no longer re-enable interrupts in these exception handlers, add the irqsoff tracing calls to them so that the kernel tracks the state more accurately. Note that these calls are conditional on IRQSOFF_TRACER: kernel ----------> user ---------> kernel ^ irqs enabled ^ irqs disabled No kernel code can run on the local CPU until we've re-entered the kernel through one of the exception handlers - and userspace can not take any locks etc. So, the kernel doesn't care about the IRQ mask state while userspace is running unless we're doing IRQ off latency tracing. So, we can (and do) avoid the overhead of updating the IRQ mask state on every kernel->user and user->kernel transition. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-02ARM: entry: instrument svc undefined exception handler with irqtraceRussell King1-0/+10
Add irqtrace function calls to the undefined exception handler, so that we get sane lockdep traces from locking problems in undefined exception handlers. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-07-02ARM: entry: avoid enabling interrupts in prefetch/data abort handlersRussell King5-50/+31
Avoid enabling interrupts if the parent context had interrupts enabled in the abort handler assembly code, and move this into the breakpoint/ page/alignment fault handlers instead. This gets rid of some special-casing for the breakpoint fault handlers from the low level abort handler path. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-30ARM: entry: prefetch abort helper: pass aborted pc in r4 rather than r0Russell King4-4/+6
This avoids unnecessary instructions for CPUs which implement the IFAR (instruction fault address register). Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-30ARM: entry: rejig register allocation in exception entry handlersRussell King1-38/+43
This allows us to avoid moving registers twice to work around the clobbered registers when we add calls to trace_hardirqs_{on,off}. Ensure that all SVC handlers return with SPSR in r5 for consistency. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-29ARM: entry: no need to check parent IRQ mask in IRQ handler returnRussell King1-2/+3
There's no point checking to see whether IRQs were masked in the parent context when returning from IRQ handling - the fact that we're handling an IRQ means that the parent context must have had IRQs unmasked. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-29ARM: entry: no need to increase preempt count for IRQ handlersRussell King1-23/+4
irq_enter() and irq_exit() already take care of the preempt_count handling for interrupts, which increment and decrement the hardirq bits of the preempt count. So we can remove the preempt count handing in our IRQ entry/exit assembly, like x86 did some 9 years ago. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-29ARM: entry: abort-macro: simplify do_ldrd_abortRussell King1-3/+1
We can test bits 27:25 and 20 of the instruction at the same time; there's no need to separate out the check of bit 20. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-29ARM: entry: abort-macro: specify registers to be used for macrosRussell King5-22/+22
Require all callers of abort macros to specify the registers to be used. This improves the documentation at the callsites as to which registers are being used by this assembly code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-29ARM: entry: prefetch/data abort helpers: avoid corrupting r4Russell King1-4/+4
Replace r4 with ip for calling abort helpers - ip is allowed to be corrupted by called functions in the ABI, so it makes more sense to use such a register. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-29ARM: entry: prefetch/data abort helpers: convert to macrosRussell King1-50/+35
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-28ARM: entry: shark: don't directly reference registers in macrosRussell King1-5/+5
Directly referencing registers in macros makes assembly code harder to change, because the macros have side effects which are non-obvious. Use the provided 'base' register rather than directly referencing r4. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-28ARM: entry: remove unused irq_prio_table macroRussell King7-26/+0
Platforms provide an empty irq_prio_table macro, and as nothing uses this macro, it can simply be removed. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-27Merge branch 'fixes' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds8-10/+48
* 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm: ARM: pm: ensure ARMv7 CPUs save and restore the TLS register ARM: pm: proc-v7: fix missing struct processor pointers for suspend code ARM: 6969/1: plat-iop: fix build error ARM: 6961/1: zImage: Add build-time check for correctly-sized proc_type entries ARM: SMP: wait for CPU to be marked active ARM: 6963/1: Thumb-2: Relax relocation requirements for non-function symbols ARM: 6962/1: mach-h720x: fix build error ARM: 6959/1: SMP build fix for entry-macro-multi.S
2011-06-24ARM: pm: ensure ARMv7 CPUs save and restore the TLS registerRussell King1-3/+7
Ensure that the TLS register is saved and restored over a suspend cycle, so that userspace programs don't see a corrupted TLS value. Tested-by: Kevin Hilman <khilman@ti.com> Acked-by: Jean Pihet <j-pihet@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-24ARM: pm: proc-v7: fix missing struct processor pointers for suspend codeRussell King1-3/+3
Add the missing suspend/resume pointers for the suspend code. This is needed when building for multiple CPUs. Tested-by: Kevin Hilman <khilman@ti.com> Acked-by: Jean Pihet <j-pihet@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-21ARM: 6969/1: plat-iop: fix build errorLinus Walleij1-0/+1
The iop13xx_defconfig didn't build since the platform code uses defines from <asm/ptrace.h>. Simply add the include so it compiles. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-21ARM: 6961/1: zImage: Add build-time check for correctly-sized proc_type entriesDave Martin1-1/+13
It is easy to mis-maintain the proc_types table such that the entries become wrongly-sized and misaligned when the kernel is built in Thumb-2. This patch adds an assembly-time check which will turn most common size/alignment mistakes in this table into build failures, to avoid having to debug the boot-time kernel hang which would happen if the resulting kernel were actually booted. 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>
2011-06-21ARM: SMP: wait for CPU to be marked activeRussell King1-1/+5
When we bring a CPU online, we should wait for it to become active before entering the idle thread, so we know that the scheduler and thread migration is going to work. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-20Merge branch 'msm-fix' of git://codeaurora.org/quic/kernel/davidb/linux-msmLinus Torvalds1-3/+11
* 'msm-fix' of git://codeaurora.org/quic/kernel/davidb/linux-msm: msm: timer: Fix DGT rate on 8960 and 8660 msm: timer: compensate for timer shift in msm_read_timer_count msm: timer: Fix SMP build error
2011-06-20msm: timer: Fix DGT rate on 8960 and 8660Stephen Boyd1-2/+4
The DGT runs at 27 MHz divided by 4 on 8660 and 8960. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org>
2011-06-17msm: timer: compensate for timer shift in msm_read_timer_countJeff Ohlstein1-1/+5
Some msm targets have timers whose lower bits are unreliable. So, we present our timers as lower frequency than they actually are, and ignore the bottom 5 bits on such targets. This compensation was erroneously removed from the msm_read_timer_count function, so restore it. This was broken by 94790ec25 "msm: timer: SMP timer support for msm". Signed-off-by: Jeff Ohlstein <johlstei@codeaurora.org>
2011-06-17Merge branches 'gpio/merge' and 'spi/merge' of ↵Linus Torvalds1-0/+1
git://git.secretlab.ca/git/linux-2.6 * 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6: gpio: add GPIOF_ values regardless on kconfig settings gpio: include linux/gpio.h where needed gpio/omap4: Fix missing interrupts during device wakeup due to IOPAD. * 'spi/merge' of git://git.secretlab.ca/git/linux-2.6: spi/bfin_spi: fix handling of default bits per word setting
2011-06-17Merge branch 'fixes' of ↵Linus Torvalds5-9/+29
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: OMAP1: PM: register notifiers with generic clock ops even when !PM_RUNTIME omap: pandora: fix NAND support OMAP: PM: omap_device: fix device power domain callbacks OMAP: PM debug: fix section mismatch warnings
2011-06-17ARM: 6963/1: Thumb-2: Relax relocation requirements for non-function symbolsDave Martin1-2/+11
The "Thumb bit" of a symbol is only really meaningful for function symbols (STT_FUNC). However, sometimes a branch is relocated against a non-function symbol; for example, PC-relative branches to anonymous assembler local symbols are typically fixed up against the start-of-section symbol, which is not a function symbol. Some inline assembler generates references of this type, such as fixup code generated by macros in <asm/uaccess.h>. The existing relocation code for R_ARM_THM_CALL/R_ARM_THM_JUMP24 interprets this case as an error, because the target symbol appears to be an ARM symbol; but this is really not the case, since the target symbol is just a base in these cases. The addend defines the precise offset to the target location, but since the addend is encoded in a non-interworking Thumb branch instruction, there is no explicit Thumb bit in the addend. Because these instructions never interwork, the implied Thumb bit in the addend is 1, and the destination is Thumb by definition. This patch removes the extraneous Thumb bit check for non-function symbols, enabling modules containing the affected relocation types to be loaded. No modification to the actual relocation code is required, since this code does not take bit[0] of the location->destination offset into account in any case. Function symbols are always checked for interworking conflicts, as before. Signed-off-by: Dave Martin <dave.martin@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-17ARM: 6962/1: mach-h720x: fix build errorLinus Walleij1-0/+2
The h7201/h7202 machines did not build since they define ARM_DMA_ZONE_OFFSET but do not select ZONE_DMA. Fix it up by selecting ZONE_DMA in their Kconfig. Cc: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-17ARM: 6959/1: SMP build fix for entry-macro-multi.SMagnus Damm2-0/+6
The assembly code in entry-macro-multi.S does not build without the include asm/assembler.h in the case of CONFIG_SMP=y. Fixes the rather theoretical SMP build of mach-shmobile/entry-intc.c: arch/arm/include/asm/entry-macro-multi.S: Assembler messages: arch/arm/include/asm/entry-macro-multi.S:20: Error: bad instruction `alt_smp(test_for_ipi r0,r6,r5,lr)' arch/arm/include/asm/entry-macro-multi.S:20: Error: bad instruction `alt_up_b(9997f)' make[1]: *** [arch/arm/mach-shmobile/entry-intc.o] Error 1 make: *** [arch/arm/mach-shmobile] Error 2 make: *** Waiting for unfinished jobs.... Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-06-16Merge branch 'rmobile-fixes-for-linus' of ↵Linus Torvalds4-71/+161
git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x * 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-3.x: ARM: mach-shmobile: mackerel: tidyup usbhs driver settings ARM: mach-shmobile: Correct SCIF port types for SH7367. ARM: mach-shmobile: sh73a0 gic_arch_extn.irq_set_wake() fix ARM: mach-shmobile: Mackerel USB platform data update ARM: mach-shmobile: AG5EVM SDHI1 platform data update
2011-06-16gpio: include linux/gpio.h where neededRandy Dunlap1-0/+1
Some files use GPIOF_ macros but don't include the header file for them. These macros are being moved to <linux/gpio.h>, so add includes for <linux/gpio.h> where needed. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-15Merge branch 'fixes' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds21-55/+76
* 'fixes' of master.kernel.org:/home/rmk/linux-2.6-arm: ARM: footbridge: fix clock event support ARM: footbridge: fix debug macros ARM: initrd: disable initrds outside of memory ARM: extend Code: line by one 16-bit quantity for Thumb instructions ARM: 6955/1: cmpxchg syscall should data abort if page not write ARM: 6954/1: zImage: fix Thumb2 breakage ARM: 6953/1: DT: don't try to access physical address zero ARM: 6949/2: mach-u300: fix compilaton warning in IO accessors Revert "ARM: 6944/1: mm: allow ASID 0 to be allocated to tasks" Revert "ARM: 6943/1: mm: use TTBR1 instead of reserved context ID" davinci: make PCM platform devices static arm: davinci: Fix fallout from generic irq chip conversion ARM: 6894/1: mmci: trigger card detect IRQs on falling and rising edges ARM: 6952/1: fix lockdep warning of "unannotated irqs-off" ARM: 6951/1: include .bss in memory layout information ARM: 6948/1: Fix .size directives for __arm{7,9}tdmi_proc_info ARM: 6947/2: mach-u300: fix compilation error in timer ARM: 6946/1: vexpress: move v2m clock init to init_early ARM: mx51/sdma: Check the chip revision in run-time arm: mxs: include asm/processor.h for cpu_relax()
2011-06-15rtc: fix build warnings in defconfigsWanlong Gao5-5/+5
RTC_CLASS is changed to bool, so 'm' is invalid. Signed-off-by: Wanlong Gao <wanlong.gao@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-15ARM: mach-shmobile: mackerel: tidyup usbhs driver settingsKuninori Morimoto1-15/+6
- usb0 pipe is same as default. own pipe config is not needed - usb1 lost get_id function Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-14Merge branch 'fixes-v3.0-rc3' into devel-fixesTony Lindgren51-149/+130
2011-06-14OMAP1: PM: register notifiers with generic clock ops even when !PM_RUNTIMEKevin Hilman2-4/+8
When runtime PM is disabled, device clocks need to be enabled on device add and disabled on device remove. This currently is not happening because in the !PM_RUNTIME case, no notifiers are registered for OMAP1 devices. Fix this by ensuring notifiers are registered, even in the !PM_RUNTIME case. Reported-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> Tested-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> Signed-off-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-06-14ARM: mach-shmobile: Correct SCIF port types for SH7367.Paul Mundt1-7/+7
While SH7377 and others were updated to properly use SCIFA/B port types, SH7367 was left behind. Fix it up accordingly. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-14ARM: mach-shmobile: sh73a0 gic_arch_extn.irq_set_wake() fixMagnus Damm1-0/+6
Initialize ->irq_set_wake() in gic_arch_extn to unbreak wake up from the KEYSC device on AG5EVM in case of Suspend-to-RAM. Without this patch "echo mem > /sys/power/state" and a key press results in the following message on resume: WARNING: at kernel/irq/manage.c:507 irq_set_irq_wake+0x7c/0xd8() Unbalanced IRQ 103 wake disable Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-14ARM: mach-shmobile: Mackerel USB platform data updateMagnus Damm1-65/+160
This patch updates the board specific USB support code for the sh7372 Mackerel board. With this patch applied port CN22 is driven by the recently added renesas_usbhs driver using the first USB controller included in sh7372 aka USBHS0. Hotplugging of USBHS0 unfortunately has to be handled by software polling. The sh7372 SoC itself obviously supports hotplug notification by IRQ but on the Mackerel board this IRQ happens to be used for the touch screen. Also fix the pinmux configuration to avoid setting up unused pins and fix minor spelling errors. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-14ARM: mach-shmobile: AG5EVM SDHI1 platform data updateMagnus Damm1-3/+1
Add a flag for SDHI1 to enable SDIO IRQ, and remove DMA Engine slave id:s to disable DMA as a workaround. Tested on sh73a0/AG5EVM with a BCM4318-based SDIO card. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-06-13Merge branch 's5p-fixes-for-linus' of ↵Linus Torvalds15-71/+26
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung * 's5p-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: S3C2410: remove the now empty mach-s3c2410/irq.c ARM: S3C24XX: Move s3c24xx_irq_syscore_ops to plat-s3c24xx/irq.c ARM: S3C24xx: Fix missing struct for s3c2410_dma_chan ARM: SAMSUNG: Remove unused onenand plat functions ARM: EXYNOS4: Remove compiler warning on exynos4_pwm4_resume ARM: S5P: Fix compilation error for exynos4_defconfig ARM: S5P: Should be S3C_VA_USB_HSPHY instead of S5P_VA_XX ARM: S5P64X0: Fix SPI platform device name ARM: S5PV210: Fix possible null pointer dereference
2011-06-13Merge branch 'for_3.0/pm-fixes' of ↵Tony Lindgren7-6/+165
ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into fixes
2011-06-13omap: pandora: fix NAND supportGrazvydas Ignotas1-1/+2
Commit d5ce2b65 "omap3630: nand: fix device size to work in polled mode" changed values for .devsize in nand platform data, now we have to pass NAND_BUSWIDTH_16 instead of '1' to select 16bit NAND. Update pandora's platform data accordingly, also specify appropriate transfer type. Signed-off-by: Grazvydas Ignotas <notasas@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-06-12Merge branch 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds2-0/+4
* 'gpio/merge' of git://git.secretlab.ca/git/linux-2.6: gpio/basic_mmio: add missing include of spinlock_types.h gpio/nomadik: fix sleepmode for elder Nomadik
2011-06-12Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds1-1/+5
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (55 commits) ISDN, hfcsusb: Don't leak in hfcsusb_ph_info() netpoll: call dev_put() on error in netpoll_setup() net: ep93xx_eth: fix DMA API violations net: ep93xx_eth: drop GFP_DMA from call to dma_alloc_coherent() net: ep93xx_eth: allocate buffers using kmalloc() net: ep93xx_eth: pass struct device to DMA API functions ep93xx: set DMA masks for the ep93xx_eth vlan: Fix the ingress VLAN_FLAG_REORDER_HDR check dl2k: EEPROM CRC calculation wrong endianess on bigendian machine NET: am79c961: fix assembler warnings NET: am79c961: ensure multicast filter is correctly set at open NET: am79c961: ensure asm() statements are marked volatile ethtool.h: fix typos ep93xx_eth: Update MAINTAINERS ipv4: Fix packet size calculation for raw IPsec packets in __ip_append_data netpoll: prevent netpoll setup on slave devices net: pmtu_expires fixes gianfar:localized filer table iwlegacy: fix channel switch locking mac80211: fix IBSS teardown race ...
2011-06-11ep93xx: set DMA masks for the ep93xx_ethMika Westerberg1-1/+5
Since the driver uses the DMA API, we should pass it valid DMA masks. Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Tested-by: Petr Stetiar <ynezz@true.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-11ARM: footbridge: fix clock event supportRussell King1-0/+1
4e8d7637 (ARM: footbridge: convert to clockevents/clocksource) did not set the cpumask for the clock event device. This causes boot to fail. Add the necessary initialization. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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