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[ARM] 4688/1: at91: speed-up irq processing
Save N instructions on every interrupt processing (where N is the number of interrupts processed in any one IRQ exception). Signed-off-by: Marc Pignat <marc.pignat@hevs.ch> Acked-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -17,13 +17,13 @@
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.endm
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.macro get_irqnr_preamble, base, tmp
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ldr \base, =(AT91_VA_BASE_SYS + AT91_AIC) @ base virtual address of AIC peripheral
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.endm
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.macro arch_ret_to_user, tmp1, tmp2
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.endm
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.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
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ldr \base, =(AT91_VA_BASE_SYS + AT91_AIC) @ base virtual address of AIC peripheral
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ldr \irqnr, [\base, #(AT91_AIC_IVR - AT91_AIC)] @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt)
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ldr \irqstat, [\base, #(AT91_AIC_ISR - AT91_AIC)] @ read interrupt source number
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teq \irqstat, #0 @ ISR is 0 when no current interrupt, or spurious interrupt
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