diff options
| author |   Marc Pignat <marc.pignat@hevs.ch> | 2007-12-03 12:58:24 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@arm.linux.org.uk> | 2008-01-26 15:00:30 +0000 |
| commit | 156864f806baa4e1aa6eabd28ac45ecc92b31315 (patch) | |
| tree | 8771cab0e5aa41e0d7f71762fe4671d58b155ae9 /include/asm-arm/arch-at91 | |
| parent | [ARM] 4657/1: AT91: Header definition update (diff) | |
| download | linux-dev-156864f806baa4e1aa6eabd28ac45ecc92b31315.tar.xz linux-dev-156864f806baa4e1aa6eabd28ac45ecc92b31315.zip | |
[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>
Diffstat (limited to 'include/asm-arm/arch-at91')
| -rw-r--r-- | include/asm-arm/arch-at91/entry-macro.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-arm/arch-at91/entry-macro.S b/include/asm-arm/arch-at91/entry-macro.S index cc1d850a0788..1005eee6219b 100644 --- a/include/asm-arm/arch-at91/entry-macro.S +++ b/include/asm-arm/arch-at91/entry-macro.S @@ -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 |