From 0d72ba930cbc9140a584af7e4e65041b6c7a7d18 Mon Sep 17 00:00:00 2001 From: Olof Johansson Date: Sat, 8 Sep 2007 05:13:19 +1000 Subject: [POWERPC] Add workaround for MPICs with broken register reads Some versions of PWRficient 1682M have an interrupt controller in which the first register in each pair for interrupt sources doesn't always read with the right polarity/sense values. To work around this, keep a software copy of the register instead. Since it's not modified from the mpic itself, it's a feasible solution. Still, keep it under a config option to avoid wasting memory on other platforms. Signed-off-by: Olof Johansson Signed-off-by: Paul Mackerras --- include/asm-powerpc/mpic.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/asm-powerpc/mpic.h') diff --git a/include/asm-powerpc/mpic.h b/include/asm-powerpc/mpic.h index 0eb3ab9ec2bb..edb4a7c84506 100644 --- a/include/asm-powerpc/mpic.h +++ b/include/asm-powerpc/mpic.h @@ -306,6 +306,10 @@ struct mpic unsigned long *hwirq_bitmap; #endif +#ifdef CONFIG_MPIC_BROKEN_REGREAD + u32 isu_reg0_shadow[MPIC_MAX_IRQ_SOURCES]; +#endif + /* link */ struct mpic *next; -- cgit v1.2.2