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Commit 156864f8 authored by Marc Pignat's avatar Marc Pignat Committed by Russell King
Browse files

[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: default avatarMarc Pignat <marc.pignat@hevs.ch>
Acked-by: default avatarAndrew Victor <andrew@sanpeople.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 9ebbec27

include/asm-arm/arch-at91/entry-macro.S

+1 −1
Original line number Diff line number Diff line
@@ -17,13 +17,13 @@ 
	.endm



	.macro  get_irqnr_preamble, base, tmp

	ldr	\base, =(AT91_VA_BASE_SYS + AT91_AIC)		@ base virtual address of AIC peripheral

	.endm



	.macro  arch_ret_to_user, tmp1, tmp2

	.endm



	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp

	ldr	\base, =(AT91_VA_BASE_SYS + AT91_AIC)		@ base virtual address of AIC peripheral

	ldr	\irqnr, [\base, #(AT91_AIC_IVR - AT91_AIC)]	@ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt)

	ldr	\irqstat, [\base, #(AT91_AIC_ISR - AT91_AIC)]	@ read interrupt source number

	teq	\irqstat, #0					@ ISR is 0 when no current interrupt, or spurious interrupt