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* Merge branch 'for-linus' of ↵Linus Torvalds2007-10-11
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6: [AVR32] Fix random segfault with preemption [AVR32] Don't use __builtin_xchg() [AVR32] ngw100 i2c-gpio tweaks [AVR32] Ignore a few irrelevant syscalls [AVR32] SMC configuration in clock cycles [AVR32] Drop support for redundant "keepinitrd" boot-time parm. [AVR32] Make dma_sync_*_for_cpu no-ops [AVR32] Remove unneeded 8K alignment of .text section [AVR32] Kill a few hardcoded constants in vmlinux.lds [AVR32] rename vmlinux.lds [AVR32] fix command line parsing in early_parse_fbmem [AVR32] checkstack support [AVR32] Wire up USBA device [AVR32] add multidrive support for pio driver [AVR32] /sys/kernel/debug/at32ap_clk [AVR32] Move AT32_PM_BASE definition into pm.h
| * [AVR32] Fix random segfault with preemptionPhilippe Rétornaz2007-10-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As explained on: http://www.avrfreaks.net/index.php?nameÿphpBB2&fileÿewtopic&tS307 If the current process is preempted before it can copy RAR_SUP and RSR_SUP both register are lost and the process will segfault as soon as it return from the syscall since the return adress will be corrupted. This patch disable IRQ as soon as we enter the syscall path and reenable them when the copy is done. In the interrupt handlers, check if we are interrupting the srrf instruction, if so disable interrupts and return. The interrupt handler will be re-called immediatly when the interrupts are reenabled. After some stressing workload: - find / > /dev/null in loop - top (in ssh) - ping -f avr32 The segfaults are not seen anymore. Signed-off-by: Philippe Rétornaz <philippe.retornaz@epfl.ch> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] Don't use __builtin_xchg()Haavard Skinnemoen2007-10-11
| | | | | | | | | | | | | | | | | | | | | | | | | | The implementation of __builtin_xchg() in at least some versions of avr32 gcc is buggy. Rather than find out exactly which versions that have this bug, let's just avoid the problem altogether by implementing xchg() in inline assembly. Also, in most architectures, xchg() seems to imply a memory barrier, while the existing avr32 implementation did not. This patch also fixes that discrepancy. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] ngw100 i2c-gpio tweaksDavid Brownell2007-10-11
| | | | | | | | | | | | | | | | | | | | | | | | | | Make the NGW100 bitbang i2c use open drain signaling. Also, speed it up, so it's closer to 100 kHz ... the code paths seem to be long enough that the udelay isn't dominating bit times. The peak bit rate I observed was around 125 kHz, but that's with large delays (usually before ACK/NAK) which hold the overall rate down to around 80 kHz (call it 100 usec/byte on average). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] Ignore a few irrelevant syscallsHaavard Skinnemoen2007-10-11
| | | | | | | | | | | | | | Ignore a few syscalls that are irrelevant because they're either old, depends on NUMA or depends on SMP. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] SMC configuration in clock cyclesKristoffer Nyborg Gregertsen2007-10-11
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes the SMC configuration take timings in clock cycles instead of nanoseconds. A function to calculate timings in clock cycles is added. This patch removes the rounding troubles of the previous SMC configuration method. [hskinnemoen@atmel.com: fix atstk1002/atngw100 flash config] Signed-off-by: Kristoffer Nyborg Gregertsen <gregerts@stud.ntnu.no> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] Drop support for redundant "keepinitrd" boot-time parm.Robert P. J. Day2007-10-11
| | | | | | | | | | | | | | | | | | Given the existing "retain_initrd" boot-time parameter defined in init/initramfs.c, there appears to be no need for the equivalent "keepinitrd" parameter. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] Make dma_sync_*_for_cpu no-opsHaavard Skinnemoen2007-10-11
| | | | | | | | | | | | | | | | | | | | | | | | I don't think the dma_sync_*_for_cpu ever did anything useful. We flush the relevant cache lines when mapping the buffer or when calling dma_sync_*_for_device(), and the CPU isn't allowed to touch the buffer after that. In other words, if these functions actually have anything to flush from the caches, we're already in trouble. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] Remove unneeded 8K alignment of .text sectionHaavard Skinnemoen2007-10-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | __init_end, which comes immediately before .text, is already page aligned, and that should be more than enough for the .text section. The reason why we need to align the .text section is because the interrupt handler offset is ORed with EVBA, so we need to provide enough alignment of EVBA that this OR operation works as an ADD. Currently, the last interrupt handler is not nearly a full page away from EVBA, so it won't be a problem. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] Kill a few hardcoded constants in vmlinux.ldsHaavard Skinnemoen2007-10-11
| | | | | | | | | | | | | | Use PAGE_SIZE, THREAD_SIZE and L1_CACHE_BYTES instead of harcoded constants in places where that's what we really mean. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] rename vmlinux.ldsSam Ravnborg2007-10-11
| | | | | | | | | | | | | | | | | | Rename vmlinux.lds to a .S file to match other architectures. Simplify Makefile to match the rename and deleted the unused USE_STANDARD_AS_RULE Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] fix command line parsing in early_parse_fbmemMatteo Vit2007-10-11
| | | | | | | | | | Signed-off-by: Matteo Vit - Dave S.r.l. <matteo.vit@dave.eu> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] checkstack supportHaavard Skinnemoen2007-10-11
| | | | | | | | | | | | Add regexes to recognize stack frame adjustments in AVR32 code. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] Wire up USBA deviceHaavard Skinnemoen2007-10-11
| | | | | | | | | | | | | | Implement at32_add_device_usba() and use it to wire up the USBA device on ATSTK1000 and ATNGW100. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] add multidrive support for pio driverMatteo Vit2007-10-11
| | | | | | | | | | | | | | This patch add multidrive support for pio driver Signed-off-by: Matteo Vit - Dave S.r.l. <matteo.vit@dave.eu> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] /sys/kernel/debug/at32ap_clkDavid Brownell2007-10-11
| | | | | | | | | | | | | | | | | | When debugfs is available, /sys/kernel/debug/at32ap_clk will provide a dump of the power manager registers and of the current clock tree. This can help sorting out various surprises, and when making runtime PM work. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
| * [AVR32] Move AT32_PM_BASE definition into pm.hHaavard Skinnemoen2007-10-11
| | | | | | | | | | | | | | We don't want to redefine this in every file that needs to access the PM. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
* | Merge branch 'for-linus' of ↵Linus Torvalds2007-10-11
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: (74 commits) Blackfin serial driver: pending a unique anomaly id, tie the break flood issue to ANOMALY_05000230 blackfin enable arbitary speed serial setting Blackfin arch: Remove cruft - CONFIG_DEBUG_SERIAL_EARLY_INIT and DEBUG_KERNEL_START Blackfin arch: fix typo in register name Blackfin arch: trim the Blackfin arch MAINTAINERS list Blackfin arch: fix bug libstdc++ calling writev with an iovec containing { NULL, 0 } fails on Blackfin Blackfin arch: Export strcpy - occasionally get module link failures otherwise Blackfin arch: the load address is not safe to point to as a workaround for ANOMALY 05000281 Blackfin arch: show_mem can not be marked as init, since it is called during OOM condition Blackfin arch: flush/inv the correct range when using write back cache and fix bugs find by dmacopy Blackfin arch: update kgdb patch Blackfin arch: Comply with revised Anomaly Workarounds for BF533 05000311 and BF561 05000323 Blackfin arch: Print out debug info, as early as possible Blackfin arch: Enable earlyprintk earlier - so any error after our interrupt tables are set up will print out Blackfin arch: fix endless loop bug when a double fault happens Blackfin arch: Initial patch to add earlyprintk support Blackfin arch: add TWIx_REGBASE and SPIx_REGBASE to specific CPU header files, use the new REGBASE for board platform resources Blackfin arch: modify the insX/outsX and dma_insX/dma_outsX to be compatible with other archs Blackfin arch: add more common defines for output sections Blackfin arch: cleanup IO and DMA_IO API function definitions according to other arches ...
| * | Blackfin serial driver: pending a unique anomaly id, tie the break flood ↵Mike Frysinger2007-08-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | issue to ANOMALY_05000230 pending a unique anomaly id, tie the break flood issue to ANOMALY_05000230 as when that was fixed, the fallout also fixed the break flood Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | blackfin enable arbitary speed serial settingAlan Cox2007-08-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the needed definitions to activate arbitary speed support on the blackfin platform. Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Aubrey Li <aubrey.li@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Remove cruft - CONFIG_DEBUG_SERIAL_EARLY_INIT and ↵Robin Getz2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | DEBUG_KERNEL_START Remove cruft - CONFIG_DEBUG_SERIAL_EARLY_INIT didn't work that well, and DEBUG_KERNEL_START was just implmented poorly. Will replace with a new checkin. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: fix typo in register nameMike Frysinger2007-10-10
| | | | | | | | | | | | | | | | | | Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: trim the Blackfin arch MAINTAINERS listMike Frysinger2007-10-10
| | | | | | | | | | | | | | | | | | Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: fix bug libstdc++ calling writev with an iovec containing { ↵Bernd Schmidt2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NULL, 0 } fails on Blackfin Fix a problem reported in the forums - libstdc++ can call writev with an iovec containing { NULL, 0 }, which works fine on i686-linux, but fails on Blackfin. Fixed by allowing size 0 transfers to/from userspace regardless of the address. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Export strcpy - occasionally get module link failures otherwiseBernd Schmidt2007-10-10
| | | | | | | | | | | | | | | | | | Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: the load address is not safe to point to as a workaround for ↵Robin Getz2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ANOMALY 05000281 Now that we have moved head.S into the init section, the load address is not safe to point to as a workaround for ANOMALY 05000281 Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: show_mem can not be marked as init, since it is called during ↵Robin Getz2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | OOM condition show_mem can not be marked as init, since it is called during OOM condition from /mm/oom_kill.c:out_of_memory() and /mm/page_alloc.c:__alloc_pages() Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: flush/inv the correct range when using write back cache and ↵Michael Hennerich2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | fix bugs find by dmacopy - flush/inv the correct range - dmacopy test failed when policy is write_back - invalidate before dma http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3367 It's the cache invalidate what is causing the issue. There is no invalidate only instruction it's always: FLUSHINV So when we "invalidate" after the DMA we might (do) overwrite freshly dma'ed data by dirty Cache WB content. Fixed by moving the "invalidate" at the beginning of dma_memcpy. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: update kgdb patchSonic Zhang2007-10-10
| | | | | | | | | | | | | | | | | | Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Comply with revised Anomaly Workarounds for BF533 05000311 ↵Michael Hennerich2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | and BF561 05000323 Comply with revised Anomaly Workarounds for BF533 05000311 and BF561 05000323 accoring to BF533 anomaly sheet Rev. A 09/04/07 Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Print out debug info, as early as possibleRobin Getz2007-10-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Print out debug info, as early as possible - even before the kernel initializes the interrupt vectors. Now we can print out debug messages almost anytime during the boot process. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Enable earlyprintk earlier - so any error after our interrupt ↵Robin Getz2007-10-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | tables are set up will print out Also ensure that the traps_c code doesn't cause a double fault, by sending a signal to a faulting kernel before the memory subsystem is fully initialized, by printing out the error message before sending the signal. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: fix endless loop bug when a double fault happensRobin Getz2007-10-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Today when a double fault happens (exception during an exception handling event), we go into an endless loop, with nothing comming out the UART. With this patch, we actually see that we have commited a double fault event Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Initial patch to add earlyprintk supportRobin Getz2007-10-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This allows debugging of problems which happen eary in the kernel boot process (after bootargs are parsed, but before serial subsystem is fully initialized) Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: add TWIx_REGBASE and SPIx_REGBASE to specific CPU header ↵Bryan Wu2007-10-10
| | | | | | | | | | | | | | | | | | | | | files, use the new REGBASE for board platform resources Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: modify the insX/outsX and dma_insX/dma_outsX to be compatible ↵Bryan Wu2007-10-09
| | | | | | | | | | | | | | | | | | | | | with other archs Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: add more common defines for output sectionsMike Frysinger2007-10-10
| | | | | | | | | | | | | | | | | | Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: cleanup IO and DMA_IO API function definitions according to ↵Bryan Wu2007-09-12
| | | | | | | | | | | | | | | | | | | | | other arches Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: fix typo pointed out by David Rowe (Mhz -> MHz)Mike Frysinger2007-09-12
| | | | | | | | | | | | | | | | | | Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Workaround reboot bug, issue SSYNC at the start of bfin_resetMichael Hennerich2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | reboot failes on BF533 http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3500 Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Add ANOMALY_05000311 Workaround - for those who doesnt use ↵Michael Hennerich2007-09-12
| | | | | | | | | | | | | | | | | | | | | | | | the generic GPIO driver Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Remove legacy supportMichael Hennerich2007-08-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | Now that there is a generic GPIO driver framework remove GPIO register unified name space legacy support. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: a few things still use bfin_read_PORT_FER()Michael Hennerich2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Update gpio_request to allow multiple request with the same signature (label) - Use generic GPIO API where applicable - Update generic board support form stamp board Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: For compatibility reasons change IRQ_XXX_ERR into ↵Michael Hennerich2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | IRQ_XXX_ERROR like on any other supported Blackfin derivative Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Remove cruft - CONFIG_DEBUG_SERIAL_EARLY_INIT didn't work ↵Robin Getz2007-08-27
| | | | | | | | | | | | | | | | | | | | | | | | that well with DEBUG_KERNEL_START Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Merge GPIO/Peripheral Resource Allocation back into a single fileMichael Hennerich2007-08-28
| | | | | | | | | | | | | | | | | | Signed-off-by: Michael Hennerich <michale.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: Fix bug missing L2_MEMORY definition for EZKIT-BF561 ↵Robin Getz2007-09-12
| | | | | | | | | | | | | | | | | | | | | | | | compiling error Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: extract gpio number from PIN functionMichael Hennerich2007-08-27
| | | | | | | | | | | | | | | | | | Singed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: rewrite our reboot code in CMike Frysinger2007-10-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | rewrite our reboot code in C rather than assembly to be like other architectures and to allow board maintainers to define custom behavior Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
| * | Blackfin arch: vmlinux.lds.S, break up our .init into separate sectionsMike Frysinger2007-08-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Break up our .init into separate section like all other ports do and so that we dont mix text and data (causes disassembly headaches as pointed out by Robin) Cc: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
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