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    Subject[PATCH 03/07] ARM: Use shared GIC entry macros on Realview
    From: Magnus Damm <damm@opensource.se>

    Use the GIC demux code in asm/hardware/entry-macro-gic.S
    on the Realview subarchitecture.

    Signed-off-by: Magnus Damm <damm@opensource.se>
    ---

    arch/arm/mach-realview/include/mach/entry-macro.S | 60 ---------------------
    1 file changed, 1 insertion(+), 59 deletions(-)

    --- 0001/arch/arm/mach-realview/include/mach/entry-macro.S
    +++ work/arch/arm/mach-realview/include/mach/entry-macro.S 2010-11-12 15:59:57.000000000 +0900
    @@ -8,7 +8,7 @@
    * warranty of any kind, whether express or implied.
    */
    #include <mach/hardware.h>
    -#include <asm/hardware/gic.h>
    +#include <asm/hardware/entry-macro-gic.S>

    .macro disable_fiq
    .endm
    @@ -21,61 +21,3 @@
    .macro arch_ret_to_user, tmp1, tmp2
    .endm

    - /*
    - * The interrupt numbering scheme is defined in the
    - * interrupt controller spec. To wit:
    - *
    - * Interrupts 0-15 are IPI
    - * 16-28 are reserved
    - * 29-31 are local. We allow 30 to be used for the watchdog.
    - * 32-1020 are global
    - * 1021-1022 are reserved
    - * 1023 is "spurious" (no interrupt)
    - *
    - * For now, we ignore all local interrupts so only return an interrupt if it's
    - * between 30 and 1020. The test_for_ipi routine below will pick up on IPIs.
    - *
    - * A simple read from the controller will tell us the number of the highest
    - * priority enabled interrupt. We then just need to check whether it is in the
    - * valid range for an IRQ (30-1020 inclusive).
    - */
    -
    - .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
    -
    - ldr \irqstat, [\base, #GIC_CPU_INTACK] /* bits 12-10 = src CPU, 9-0 = int # */
    -
    - ldr \tmp, =1021
    -
    - bic \irqnr, \irqstat, #0x1c00
    -
    - cmp \irqnr, #29
    - cmpcc \irqnr, \irqnr
    - cmpne \irqnr, \tmp
    - cmpcs \irqnr, \irqnr
    -
    - .endm
    -
    - /* We assume that irqstat (the raw value of the IRQ acknowledge
    - * register) is preserved from the macro above.
    - * If there is an IPI, we immediately signal end of interrupt on the
    - * controller, since this requires the original irqstat value which
    - * we won't easily be able to recreate later.
    - */
    -
    - .macro test_for_ipi, irqnr, irqstat, base, tmp
    - bic \irqnr, \irqstat, #0x1c00
    - cmp \irqnr, #16
    - strcc \irqstat, [\base, #GIC_CPU_EOI]
    - cmpcs \irqnr, \irqnr
    - .endm
    -
    - /* As above, this assumes that irqstat and base are preserved.. */
    -
    - .macro test_for_ltirq, irqnr, irqstat, base, tmp
    - bic \irqnr, \irqstat, #0x1c00
    - mov \tmp, #0
    - cmp \irqnr, #29
    - moveq \tmp, #1
    - streq \irqstat, [\base, #GIC_CPU_EOI]
    - cmp \tmp, #0
    - .endm

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      Last update: 2010-11-12 09:21    [W:0.024 / U:31.788 seconds]
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