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* Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds2014-04-05101-3277/+5099
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull ARM changes from Russell King: - Perf updates from Will Deacon: - Support for Qualcomm Krait processors (run perf on your phone!) - Support for Cortex-A12 (run perf stat on your FPGA!) - Support for perf_sample_event_took, allowing us to automatically decrease the sample rate if we can't handle the PMU interrupts quickly enough (run perf record on your FPGA!). - Basic uprobes support from David Long: This patch series adds basic uprobes support to ARM. It is based on patches developed earlier by Rabin Vincent. That approach of adding hooks into the kprobes instruction parsing code was not well received. This approach separates the ARM instruction parsing code in kprobes out into a separate set of functions which can be used by both kprobes and uprobes. Both kprobes and uprobes then provide their own semantic action tables to process the results of the parsing. - ARMv7M (microcontroller) updates from Uwe Kleine-König - OMAP DMA updates (recently added Vinod's Ack even though they've been sitting in linux-next for a few months) to reduce the reliance of omap-dma on the code in arch/arm. - SA11x0 changes from Dmitry Eremin-Solenikov and Alexander Shiyan - Support for Cortex-A12 CPU - Align support for ARMv6 with ARMv7 so they can cooperate better in a single zImage. - Addition of first AT_HWCAP2 feature bits for ARMv8 crypto support. - Removal of IRQ_DISABLED from various ARM files - Improved efficiency of virt_to_page() for single zImage - Patch from Ulf Hansson to permit runtime PM callbacks to be available for AMBA devices for suspend/resume as well. - Finally kill asm/system.h on ARM. * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (89 commits) dmaengine: omap-dma: more consolidation of CCR register setup dmaengine: omap-dma: move IRQ handling to omap-dma dmaengine: omap-dma: move register read/writes into omap-dma.c ARM: omap: dma: get rid of 'p' allocation and clean up ARM: omap: move dma channel allocation into plat-omap code ARM: omap: dma: get rid of errata global ARM: omap: clean up DMA register accesses ARM: omap: remove almost-const variables ARM: omap: remove references to disable_irq_lch dmaengine: omap-dma: cleanup errata 3.3 handling dmaengine: omap-dma: provide register read/write functions dmaengine: omap-dma: use cached CCR value when enabling DMA dmaengine: omap-dma: move barrier to omap_dma_start_desc() dmaengine: omap-dma: move clnk_ctrl setting to preparation functions dmaengine: omap-dma: improve efficiency loading C.SA/C.EI/C.FI registers dmaengine: omap-dma: consolidate clearing channel status register dmaengine: omap-dma: move CCR buffering disable errata out of the fast path dmaengine: omap-dma: provide register definitions dmaengine: omap-dma: consolidate setup of CCR dmaengine: omap-dma: consolidate setup of CSDP ...
| * Merge branch 'devel-stable' into for-nextRussell King2014-04-0493-2783/+4791
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| | * Merge branch 'uprobes-v7' of git://git.linaro.org/people/dave.long/linux ↵Russell King2014-03-1966-2754/+3700
| | |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | into devel-stable This patch series adds basic uprobes support to ARM. It is based on patches developed earlier by Rabin Vincent. That approach of adding hooks into the kprobes instruction parsing code was not well received. This approach separates the ARM instruction parsing code in kprobes out into a separate set of functions which can be used by both kprobes and uprobes. Both kprobes and uprobes then provide their own semantic action tables to process the results of the parsing.
| | | * ARM: add uprobes supportDavid A. Long2014-03-189-1/+542
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using Rabin Vincent's ARM uprobes patches as a base, enable uprobes support on ARM. Caveats: - Thumb is not supported Signed-off-by: Rabin Vincent <rabin@rab.in> Signed-off-by: David A. Long <dave.long@linaro.org>
| | | * ARM: Make arch_specific_insn a define for new arch_probes_insn structureDavid A. Long2014-03-1812-82/+84
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Because the common underlying code for ARM kprobes and uprobes needs to share a common architecrure-specific context structure, and because the generic kprobes include file insists on defining this to a dummy structure when kprobes is not configured, a new common structure is required which can exist when uprobes is configured without kprobes. In this case kprobes will define a dummy structure, but without the define aliasing the two structure tags it will not affect uprobes and the shared probes code. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: Add an emulate flag to the kprobes/uprobes instruction decode functionsDavid A. Long2014-03-188-16/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an emulate flag into the instruction interpreter, primarily for uprobes support. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: Change the remaining shared kprobes/uprobes symbols to something genericDavid A. Long2014-03-1811-73/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Any more ARM kprobes/uprobes symbols which have "kprobe" in the name must be changed to the more generic "probes" or other non-kprobes specific symbol. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: Rename the shared kprobes/uprobe return value enumDavid A. Long2014-03-186-24/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change the name of kprobes_insn to probes_insn so it can be shared between kprobes and uprobes without confusion. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: Change more ARM kprobes symbol names to something more genericDavid A. Long2014-03-186-19/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change kprobe_emulate_none, kprobe_simulate_nop, and arm_kprobe_decode_init function names to something more appropriate for code being shared outside of the kprobes subsystem. Also, move the new arm_probes_decode_init declaration out of the kprobes.h include file and into the probes.h include file. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: Make the kprobes condition_check symbol names more genericDavid A. Long2014-03-1810-97/+98
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for sharing the ARM kprobes instruction interpreting code with uprobes, make the symbols names less kprobes-specific. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: Remove use of struct kprobe from generic probes codeDavid A. Long2014-03-1810-170/+201
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change the generic ARM probes code to pass in the opcode and architecture-specific structure separately instead of using struct kprobe, so we do not pollute code being used only for uprobes or other non-kprobes instruction interpretation. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: use a function table for determining instruction interpreter actionDavid A. Long2014-03-1811-271/+441
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the instruction interpreter call back to semantic action functions through a function pointer array provided by the invoker. The interpreter decodes the instructions into groups and uses the group number to index into the supplied array. kprobes and uprobes code will each supply their own array of functions. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: move generic thumb instruction parsing code to new files for use by ↵David A. Long2014-03-184-910/+1000
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | other feature Move the thumb version of the kprobes instruction parsing code into more generic files from where it can be used by uprobes and possibly other subsystems. The symbol names will be made more generic in a subsequent part of this patchset. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: Move generic arm instruction parsing code to new files for sharing ↵David A. Long2014-03-189-1513/+1624
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | between features Move the arm version of the kprobes instruction parsing code into more generic files from where it can be used by uprobes and possibly other subsystems. The symbol names will be made more generic in a subsequent part of this patchset. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: move shared uprobe/kprobe definitions into new include fileDavid A. Long2014-03-182-14/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Separate the kprobe-only definitions from the definitions needed by both kprobes and uprobes. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | | * ARM: Fix missing includes in kprobes sourcesDavid A. Long2014-03-185-2/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make sure includes in ARM kprobes sources are done explicitly. Do not rely on includes from other includes. Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Jon Medhurst <tixy@linaro.org>
| | * | Merge branch 'for-rmk/perf' of ↵Russell King2014-03-0738-60/+1107
| | |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable * Support for Qualcomm Krait processors (run perf on your phone!) * Support for Cortex-A12 (run perf stat on your FPGA!) * Support for perf_sample_event_took, allowing us to automatically decrease the sample rate if we can't handle the PMU interrupts quickly enough (run perf record on your FPGA!). As part of the Krait support, we also gain support for PPI generation by the PMU.
| | | * | ARM: perf: add support for the Cortex-A12 PMUAlbin Tonnerre2014-02-212-0/+159
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cortex-A12 implements Performance Monitors compliant with the PMUv2 architecture. This patch adds support for the Cortex-A12 PMU to the ARM perf backend. Signed-off-by: Albin Tonnerre <albin.tonnerre@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
| | | * | ARM: perf: remove unused PMU probing codeMark Rutland2014-02-211-9/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ARM perf backend can discover the type of PMU it needs to drive either from DT or by probing a CPU it is running on. For Cortex-A{5,7,15} there are no platforms in mainline not using dt, and this probing won't work well for big.LITTLE systems with heterogeneous PMUs. This patch drops the probing for those CPUs, relying on information from dt instead. Future platforms should describe their PMU(s) with dt. Suggested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
| | | * | ARM: perf: hook up perf_sample_event_took around pmu irq handlingWill Deacon2014-02-211-2/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since we indirect all of our PMU IRQ handling through a dispatcher, it's trivial to hook up perf_sample_event_took to prevent applications such as oprofile from generating interrupt storms due to an unrealisticly low sample period. Reported-by: Robert Richter <rric@kernel.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
| | | * | ARM: perf: fully support Krait CPU PMU eventsStephen Boyd2014-02-211-6/+401
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Krait supports a set of performance monitor region event selection registers (PMRESR) sitting behind a cp15 based interface that extend the architected PMU events to include Krait CPU and Venum VFP specific events. To use these events the user is expected to program the region register (PMRESRn) with the event code shifted into the group they care about and then point the PMNx event at that region+group combo by writing a PMRESRn_GROUPx event. Add support for this hardware. Note: the raw event number is a pure software construct that allows us to map the multi-dimensional number space of regions, groups, and event codes into a flat event number space suitable for use by the perf framework. This is based on code originally written by Ashwin Chaugule and Neil Leeder [1]. [1] https://www.codeaurora.org/cgit/quic/la/kernel/msm/tree/arch/arm/kernel/perf_event_msm_krait.c?h=msm-3.4 Cc: Neil Leeder <nleeder@codeaurora.org> Cc: Ashwin Chaugule <ashwinc@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
| | | * | ARM: perf: add hook for event index clearingStephen Boyd2014-02-212-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Krait processors we have a many-to-one relationship between raw CPU events and the event programmed into the PMNx counter. Two raw CPU events could map to the same value programmed in the PMNx counter. To avoid this problem, we check for collisions during the get_event_idx() callback by setting a bit in a bitmap whenever a certain event is used in a PMNx counter (see the next patch). Unfortunately, we don't have a hook to clear this bit in the bitmap when the event is deleted so let's add an optional clear_event_idx() callback for this purpose. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
| | | * | ARM: perf: add basic support for Krait CPU PMUsStephen Boyd2014-02-212-0/+165
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add basic support for the Krait CPU PMU. This allows us to use the architected functionality of the PMU. This is based on code originally written by Ashwin Chaugule and Neil Leeder [1]. [1] https://www.codeaurora.org/cgit/quic/la/kernel/msm/tree/arch/arm/kernel/perf_event_msm_krait.c?h=msm-3.4 Cc: Neil Leeder <nleeder@codeaurora.org> Cc: Ashwin Chaugule <ashwinc@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
| | | * | ARM: perf: assign pdev pointer earlier for CPU PMUsStephen Boyd2014-02-211-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We want to inspect the of_node that the pdev is pointing to in the Krait CPU specific PMU initialization function. Assign it earlier so that we don't crash with a NULL pointer dereference. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
| | | * | ARM: perf: support percpu irqs for the CPU PMUStephen Boyd2014-02-212-31/+80
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some CPU PMUs are wired up with one PPI for all the CPUs instead of with a different SPI for each CPU. Add support for these devices. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
| | * | | ARM: v7m: add trivial suspend supportUwe Kleine-König2014-02-031-1/+1
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
| | * | | ARM: show_regs: on v7-M there are no FIQs, different processor modes, ...Uwe Kleine-König2014-02-031-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | no indication about irqs in PSR and only a single ISA. So skip the whole decoding and just print the xPSR on v7-M. Also mark two static variables as __maybe_unused to prevent the compiler from emitting: arch/arm/kernel/process.c:51:20: warning: 'processor_modes' defined but not used [-Wunused-variable] arch/arm/kernel/process.c:58:20: warning: 'isa_modes' defined but not used [-Wunused-variable] Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
| | * | | ARM: make isa_mode macro more robust and fix for v7-MUwe Kleine-König2014-02-031-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The definition of isa_mode hardcodes the values to shift PSR_J_BIT and PSR_T_BIT to move them to bits 1 and 0 respectively. Instead use __ffs to calculate the shift from the #define already used for masking. This is relevant on v7-M as there PSR_T_BIT is 0x01000000 instead of 0x00000020 for V7-[AR] and earlier. Because of that isa_mode produced values >= 0x80000 which are unsuitable to index into isa_modes[4] there and so made __show_regs read from undefined memory which resulted in hangs and crashes. Moreover isa_mode is wrong for v7-M even after this robustness fix as there is no J-bit in the PSR register. So hardcode isa_mode to "Thumb" for v7-M. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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| *-----. \ \ \ Merge branches 'amba', 'fixes', 'misc', 'mmci', 'unstable/omap-dma' and ↵Russell King2014-04-0484-705/+777
| |\ \ \ \ \ \ \ | | |_|_|_|/ / / | |/| | | | | | | | | | | | | | 'unstable/sa11x0' into for-next
| | | | | * | | ARM: 8006/1: Remove redundant codeAlexander Shiyan2014-03-191-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Statements following return will never be executed. This patch removes this code. Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | | * | | ARM: 7936/1: sa1100: collie: add support for IrDA transceiverDmitry Eremin-Solenikov2014-02-122-1/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Collie has onboard IrDA transceiver controlled via active-low gpio. Add corresponding platform data. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | | * | | ARM: 7903/1: sa1100: h3xxx: drop hand-coded gpio_request_array analogueDmitry Eremin-Solenikov2014-02-122-42/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | h3xxx_init_gpio() behaves alsmost like gpio_request_array. Also after all GPIO refactoring it is unused. Drop it now. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | | * | | ARM: 7902/1: sa1100: h3xxx: move serial port GPIO handling to common placeDmitry Eremin-Solenikov2014-02-123-14/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Both h3100 and h3600 request UART gpios during init_machine time. As sa1100 gpio driver is going to become proper machine driver, move gpio handling to UART port functions. Request all gpios using gpio_request array once and then guard them from rerequesting with bool variable. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | * | | | dmaengine: omap-dma: move register read/writes into omap-dma.cRussell King2014-04-042-6/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Export the DMA register information from the SoC specific data, such that we can access the registers directly in omap-dma.c, mapping the register region ourselves as well. Rather than calculating the DMA channel register in its entirety for each access, we pre-calculate an offset base address for the allocated DMA channel and then just use the appropriate register offset. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | * | | | ARM: omap: dma: get rid of 'p' allocation and clean upRussell King2014-04-042-43/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The omap_system_dma_plat_info structure is only seven words, it's not worth the expense of kmalloc()'ing backing store for this only to release it later. Note that platform_device_add_data() copies the data anyway. Clean up the initialisation of this structure - we don't even need code to initialise most of this structure. Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | * | | | ARM: omap: move dma channel allocation into plat-omap codeRussell King2014-04-043-25/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This really needs to be there, because otherwise the plat-omap code can kfree() this data structure, and then re-use the pointer later. Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | * | | | ARM: omap: dma: get rid of errata globalRussell King2014-04-042-5/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's no need for this to be a global variable; move it into the errata configuration function instead. Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | * | | | ARM: omap: clean up DMA register accessesRussell King2014-04-042-114/+102
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We can do much better with this by using a structure to describe each register, rather than code. Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | * | | | ARM: omap: remove almost-const variablesRussell King2014-04-042-19/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dma_stride and dma_common_ch_start are only ever initialised to one known value at initialisation, and are private to each of these files. There's no point these being variables at all. Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | * | | | ARM: omap: remove references to disable_irq_lchRussell King2014-04-042-11/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The disable_irq_lch method is never actually used, so there's not much point it existing; remove it. Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | | * | | | dmaengine: omap-dma: provide a hook to get the underlying DMA platform opsRussell King2014-04-041-0/+6
| | |_|/ / / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide and use a hook to obtain the underlying DMA platform operations so that omap-dma.c can access the hardware more directly without involving the legacy DMA driver. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * | | | ARM: Better virt_to_page() handlingRussell King2014-04-033-26/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | virt_to_page() is incredibly inefficient when virt-to-phys patching is enabled. This is because we end up with this calculation: page = &mem_map[asm virt_to_phys(addr) >> 12 - __pv_phys_offset >> 12] in assembly. The asm virt_to_phys() is equivalent this this operation: addr - PAGE_OFFSET + __pv_phys_offset and we can see that because this is assembly, the compiler has no chance to optimise some of that away. This should reduce down to: page = &mem_map[(addr - PAGE_OFFSET) >> 12] for the common cases. Permit the compiler to make this optimisation by giving it more of the information it needs - do this by providing a virt_to_pfn() macro. Another issue which makes this more complex is that __pv_phys_offset is a 64-bit type on all platforms. This is needlessly wasteful - if we store the physical offset as a PFN, we can save a lot of work having to deal with 64-bit values, which sometimes ends up producing incredibly horrid code: a4c: e3009000 movw r9, #0 a4c: R_ARM_MOVW_ABS_NC __pv_phys_offset a50: e3409000 movt r9, #0 ; r9 = &__pv_phys_offset a50: R_ARM_MOVT_ABS __pv_phys_offset a54: e3002000 movw r2, #0 a54: R_ARM_MOVW_ABS_NC __pv_phys_offset a58: e3402000 movt r2, #0 ; r2 = &__pv_phys_offset a58: R_ARM_MOVT_ABS __pv_phys_offset a5c: e5999004 ldr r9, [r9, #4] ; r9 = high word of __pv_phys_offset a60: e3001000 movw r1, #0 a60: R_ARM_MOVW_ABS_NC mem_map a64: e592c000 ldr ip, [r2] ; ip = low word of __pv_phys_offset Reviewed-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * | | | ARM: 8003/1: w90x900: remove deprecated IRQF_DISABLEDMichael Opdenacker2014-03-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the use of the IRQF_DISABLED flag from arch/arm/mach-w90x900/time.c It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Acked-by: Wan zongshun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * | | | ARM: 8002/1: spear: remove deprecated IRQF_DISABLEDMichael Opdenacker2014-03-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the use of the IRQF_DISABLED flag from arch/arm/mach-spear/time.c It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * | | | ARM: 8001/1: mmp: remove deprecated IRQF_DISABLEDMichael Opdenacker2014-03-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the use of the IRQF_DISABLED flag from arch/arm/mach-mmp/time.c It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * | | | ARM: 8000/1: misc: remove deprecated IRQF_DISABLEDMichael Opdenacker2014-03-129-9/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the use of the IRQF_DISABLED flag from miscellaneous code in mach-xxx and plat-xxx This flag is a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * | | | ARM: 7999/1: arch/arm/mach-lpc32xx-remove-irqf-disabledMichael Opdenacker2014-03-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the use of the IRQF_DISABLED flag from arch/arm/mach-lpc32xx/timer.c It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * | | | ARM: 7998/1: IXP4xx: remove deprecated IRQF_DISABLEDMichael Opdenacker2014-03-125-13/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the use of the IRQF_DISABLED flag from code in arch/arm/mach-ixp4xx It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * | | | ARM: 7997/1: cns3xxx: remove deprecated IRQF_DISABLEDMichael Opdenacker2014-03-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the use of the IRQF_DISABLED flag from arch/arm/mach-cns3xxx/core.c It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * | | | ARM: 7996/1: floppy.h: remove deprecated IRQF_DISABLEDMichael Opdenacker2014-03-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the use of the IRQF_DISABLED flag in arch/arm/include/asm/floppy.h It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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