1. 13 May, 2012 3 commits
  2. 15 Apr, 2012 2 commits
    • Tkhai Kirill's avatar
      sparc32: generic clockevent support · 62f08283
      Tkhai Kirill authored
      
      
      The kernel uses l14 timers as clockevents. l10 timer is used
      as clocksource if platform master_l10_counter isn't constantly
      zero. The clocksource is continuous, so it's possible to use
      high resolution timers. l10 timer is also used as clockevent
      on UP configurations.
      
      This realization is for sun4m, sun4d, sun4c, microsparc-IIep
      and LEON platforms. The appropriate LEON changes was made by
      Konrad Eisele.
      
      In case of sun4m's oneshot mode, profile irq is zeroed in
      smp4m_percpu_timer_interrupt(). It is maybe
      needless (double, triple etc overflow does nothing).
      
      sun4d is able to have oneshot mode too, but I haven't
      any way to test it. So code of its percpu timer handler
      is made as much equal to the current code as possible.
      
      The patch is tested on sun4m box in SMP mode by me,
      and tested by Konrad on leon in up mode (leon smp
      is broken atm - due to other reasons).
      Signed-off-by: default avatarTkhai Kirill <tkhai@yandex.ru>
      Tested-by: Konrad Eisele <konrad@gaisler.com> [leon up]
      [sam: revised patch to provide generic support for leon]
      Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      62f08283
    • Sam Ravnborg's avatar
      sparc32: rename sparc_irq_config to sparc_config · 472bc4f2
      Sam Ravnborg authored
      
      
      This struct holds platform specific config and is thus not
      limited to irq stuff.
      Do not let the name confuse us to think this is irq only.
      Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      472bc4f2
  3. 28 Mar, 2012 1 commit
    • Rusty Russell's avatar
      remove references to cpu_*_map in arch/ · 0b5f9c00
      Rusty Russell authored
      
      
      This has been obsolescent for a while; time for the final push.
      
      In adjacent context, replaced old cpus_* with cpumask_*.
      Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      Acked-by: David S. Miller <davem@davemloft.net> (arch/sparc)
      Acked-by: Chris Metcalf <cmetcalf@tilera.com> (arch/tile)
      Cc: user-mode-linux-devel@lists.sourceforge.net
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: linux-arm-kernel@lists.infradead.org
      Cc: Richard Kuo <rkuo@codeaurora.org>
      Cc: linux-hexagon@vger.kernel.org
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Helge Deller <deller@gmx.de>
      Cc: sparclinux@vger.kernel.org
      0b5f9c00
  4. 31 Oct, 2011 1 commit
  5. 09 Jun, 2011 1 commit
  6. 02 Jun, 2011 1 commit
    • Daniel Hellstrom's avatar
      sparc32,leon: add GRPCI2 PCI Host driver · 5d07b786
      Daniel Hellstrom authored
      
      
      The DMA region must be accessible in order for PCI peripheral
      drivers to work, the sparc32 has DMA in the normal memory
      zone which requires the GRPCI2 to PCI target BARs so that all
      kernel low mem (192MB) can be mapped 1:1 to PCI address
      space. The GRPCI2 has resizeable target BARs, by default the
      first is made 256MB and all other BARs are disabled.
      
      I/O space are always located on 0x1000-0x10000, but accessed
      through the GRPCI2 PCI I/O Window memory mapped to virtual
      address space.
      
      Configuration space is accessed through the 64KB GRPCI2 PCI
      CFG Window using LDA bypassing the MMU.
      
      The GRPCI2 has a single PCI Window for prefetchable and non-
      prefetchable address space, it is up to the AHB master
      requesting PCI data to determine access type. Memory space
      is mapped 1:1.
      
      The GRPCI2 core can be configured in 4 different IRQ modes,
      where PCI Interrupt, Error Interrupt and DMA Interrupt are
      shared on a single IRQ line or at most 5 IRQs are used. The
      GRPCI2 can mask/unmask PCI interrupts, Err and DMA in the control
      and check status bits which tells us which IRQ really happended.
      The GENIRQ layer is used to unmask/mask each individual IRQ
      source by creating virtual IRQs and implementing a IRQ chip.
      
      The optional DMA functionality of the GRPCI2 is not supported
      by this patch.
      Signed-off-by: default avatarDaniel Hellstrom <daniel@gaisler.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5d07b786
  7. 21 Apr, 2011 8 commits
  8. 19 Apr, 2011 1 commit
    • Sam Ravnborg's avatar
      sparc32: genirq support · 6baa9b20
      Sam Ravnborg authored
      
      
      The conversion of sparc32 to genirq is based on original work done
      by David S. Miller.
      Daniel Hellstrom has helped in the conversion and implemented
      the shutdowm functionality.
      Marcel van Nies <morcles@gmail.com> has tested this on Sparc Station 20
      
      Test status:
      sun4c      - not tested
      sun4m,pci  - not tested
      sun4m,sbus - tested (Sparc Classic, Sparc Station 5, Sparc Station 20)
      sun4d      - not tested
      leon       - tested on various combinations of leon boards,
                   including SMP variants
      
      generic
         Introduce use of GENERIC_HARDIRQS and GENERIC_IRQ_SHOW
         Allocate 64 IRQs - which is enough even for SS2000
         Use a table of irq_bucket to maintain uses IRQs
            irq_bucket is also used to chain several irq's that
            must be called when the same intrrupt is asserted
         Use irq_link to link a interrupt source to the irq
         All plafforms must now supply their own build_device_irq method
         handler_irq rewriten to use generic irq support
      
      floppy
         Read FLOPPY_IRQ from platform device
         Use generic request_irq to register the floppy interrupt
         Rewrote sparc_floppy_irq to use the generic irq support
      
      pcic:
         Introduce irq_chip
         Store mask in chip_data for use in mask/unmask functions
         Add build_device_irq for pcic
         Use pcic_build_device_irq in pci_time_init
         allocate virtual irqs in pcic_fill_irq
      
      sun4c:
         Introduce irq_chip
         Store mask in chip_data for use in mask/unmask functions
         Add build_device_irq for sun4c
         Use sun4c_build_device_irq in sun4c_init_timers
      
      sun4m:
         Introduce irq_chip
         Introduce dedicated mask/unmask methods
         Introduce sun4m_handler_data that allow easy access to necessary
           data in the mask/unmask functions
         Add a helper method to enable profile_timer (used from smp)
         Added sun4m_build_device_irq
         Use sun4m_build_device_irq in sun4m_init_timers
      
         TODO:
            There is no replacement for smp_rotate that always scheduled
            next CPU as interrupt target upon an interrupt
      
      sun4d:
         Introduce irq_chip
         Introduce dedicated mask/unmask methods
         Introduce sun4d_handler_data that allow easy access to
         necessary data in mask/unmask fuctions
         Rewrote sun4d_handler_irq to use generic irq support
      
         TODO:
            The original implmentation of enable/disable had:
      
                if (irq < NR_IRQS)
                     return;
      
            The new implmentation does not distingush between SBUS and cpu
            interrupts.
            I am no sure what is right here. I assume we need to do
            something for the cpu interrupts.
      
            I have not succeeded booting my sun4d box (with or without this patch)
            and my understanding of this platfrom is limited.
            So I would be a bit suprised if this works.
      
      leon:
         Introduce irq_chip
         Store mask in chip_data for use in mask/unmask functions
         Add build_device_irq for leon
         Use leon_build_device_irq in leon_init_timers
      Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
      Acked-by: default avatarDaniel Hellstrom <daniel@gaisler.com>
      Tested-by: default avatarDaniel Hellstrom <daniel@gaisler.com>
      Tested-by: default avatarMarcel van Nies <morcles@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6baa9b20
  9. 16 Mar, 2011 2 commits
  10. 04 Jan, 2011 4 commits
  11. 29 Oct, 2010 1 commit
  12. 12 Oct, 2010 1 commit
  13. 30 Mar, 2010 1 commit
    • Tejun Heo's avatar
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo authored
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Guess-its-ok-by: default avatarChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  14. 22 Feb, 2010 1 commit
  15. 12 Feb, 2010 1 commit
  16. 09 Feb, 2010 1 commit
  17. 02 Nov, 2009 1 commit
  18. 17 Aug, 2009 1 commit