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/freebsd-10.1-release/sys/powerpc/ofw/
H A Dofw_pcibus.cdiff 209299 Fri Jun 18 12:32:21 MDT 2010 nwhitehorn Change the default interrupt polarity on PowerPC systems from high to low.
On Apple systems at least, all the level interrupts are wired active low.
Before this change, our PIC programming only worked because Apple hardware
ignores the interrupt polarity bit on all interrupts except IRQ 0.
/freebsd-10.1-release/sys/powerpc/powermac/
H A Duninorth.cdiff 209299 Fri Jun 18 12:32:21 MDT 2010 nwhitehorn Change the default interrupt polarity on PowerPC systems from high to low.
On Apple systems at least, all the level interrupts are wired active low.
Before this change, our PIC programming only worked because Apple hardware
ignores the interrupt polarity bit on all interrupts except IRQ 0.
/freebsd-10.1-release/sys/powerpc/powerpc/
H A Dopenpic.cdiff 209299 Fri Jun 18 12:32:21 MDT 2010 nwhitehorn Change the default interrupt polarity on PowerPC systems from high to low.
On Apple systems at least, all the level interrupts are wired active low.
Before this change, our PIC programming only worked because Apple hardware
ignores the interrupt polarity bit on all interrupts except IRQ 0.

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