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ARM: 6481/1: Use shared GIC entry macros on OMAP
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Common GIC entry macro for omap

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Magnus Damm <damm@opensource.se>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Magnus Damm authored and Russell King committed Dec 7, 2010
1 parent c91a2bd commit e745a66
Showing 1 changed file with 31 additions and 61 deletions.
92 changes: 31 additions & 61 deletions arch/arm/mach-omap2/include/mach/entry-macro.S
Original file line number Diff line number Diff line change
Expand Up @@ -105,6 +105,35 @@ omap_irq_base: .word 0
9999:
.endm

#ifdef CONFIG_SMP
/* 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
it cc
strcc \irqstat, [\base, #GIC_CPU_EOI]
it cs
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
itt eq
moveq \tmp, #1
streq \irqstat, [\base, #GIC_CPU_EOI]
cmp \tmp, #0
.endm
#endif /* CONFIG_SMP */

#else /* MULTI_OMAP2 */

Expand Down Expand Up @@ -141,74 +170,15 @@ omap_irq_base: .word 0


#ifdef CONFIG_ARCH_OMAP4
#include <asm/hardware/entry-macro-gic.S>

.macro get_irqnr_preamble, base, tmp
ldr \base, =OMAP4_IRQ_BASE
.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]

ldr \tmp, =1021

bic \irqnr, \irqstat, #0x1c00

cmp \irqnr, #29
cmpcc \irqnr, \irqnr
cmpne \irqnr, \tmp
cmpcs \irqnr, \irqnr
.endm
#endif
#endif /* MULTI_OMAP2 */

#ifdef CONFIG_SMP
/* 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
it cc
strcc \irqstat, [\base, #GIC_CPU_EOI]
it cs
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
itt eq
moveq \tmp, #1
streq \irqstat, [\base, #GIC_CPU_EOI]
cmp \tmp, #0
.endm
#endif /* CONFIG_SMP */
#endif /* MULTI_OMAP2 */

.macro irq_prio_table
.endm

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