Doug / smarc-fsl-linux-kernel

15 May, 2012

3 commits

14 May, 2012

2 commits

12 May, 2012

1 commit

16 Apr, 2012

2 commits

  • 62f082830   sparc32: generic clockevent support ... Browse Code »

    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: Tkhai Kirill
    Tested-by: Konrad Eisele [leon up]
    [sam: revised patch to provide generic support for leon]
    Signed-off-by: Sam Ravnborg
    Signed-off-by: David S. Miller

    Tkhai Kirill
     
  • 472bc4f2a   sparc32: rename sparc_irq_config to sparc_config ... Browse Code »

    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: Sam Ravnborg
    Signed-off-by: David S. Miller

    Sam Ravnborg
     

29 Mar, 2012

1 commit

30 Aug, 2011

1 commit

  • 38f7f8f05   sparc32,sun4d: Change IPI IRQ level to prevent collision between IPI and timer interrupt ... Browse Code »

    On Sun4d systems running in SMP mode, IRQ 14 is used for timer interrupts
    and has a specialized interrupt handler. IPI is currently set to use IRQ 14
    as well, which causes it to trigger the timer interrupt handler, and not the
    IPI interrupt handler.

    The IPI interrupt is therefore changed to IRQ 13, which is the highest
    normally handled interrupt. This IRQ is also used for SBUS interrupts,
    however there is nothing in the IPI/SBUS interrupt handlers that indicate
    that they will not handle sharing the interrupt.
    (IRQ 13 is indicated as audio interrupt, which is unlikely to be found in a
    sun4d system)

    Signed-off-by: Kjetil Oftedal
    Signed-off-by: David S. Miller

    Kjetil Oftedal
     

17 May, 2011

1 commit

  • 55dd23eca   sparc32, sun4d: Implemented SMP IPIs support for SUN4D machines ... Browse Code »

    The sun4d does not seem to have a distingstion between soft and hard
    IRQs. When generating IPIs the generated IRQ looks like a hard IRQ,
    this patch adds a "IPI check" in the sun4d irq trap handler at a
    predefined IRQ number (SUN4D_IPI_IRQ). Before generating an IPI
    a per-cpu memory structure is modified for the "IPI check" to
    successfully detect a IPI request to a specific processor, the check
    clears the IPI work requested.

    All three IPIs (resched, single and cpu-mask) use the same IRQ
    number.

    The IPI IRQ should preferrably be on a separate IRQ and definitly
    not shared with IRQ handlers requesting IRQ with IRQF_SHARED.

    Signed-off-by: Daniel Hellstrom
    Signed-off-by: David S. Miller

    Daniel Hellstrom
     

20 Apr, 2011

1 commit

  • 6baa9b20a   sparc32: genirq support ... Browse Code »

    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 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: Sam Ravnborg
    Acked-by: Daniel Hellstrom
    Tested-by: Daniel Hellstrom
    Tested-by: Marcel van Nies
    Cc: Thomas Gleixner
    Signed-off-by: David S. Miller

    Sam Ravnborg
     

17 Mar, 2011

3 commits

20 Sep, 2008

1 commit

22 Jul, 2007

2 commits