M. Warner Losh wrote: > In message: <018e01c5fafe$c9154a20$642a15ac_at_smiley> > "Darren Pilgrim" <darren.pilgrim_at_bitfreak.org> writes: > : From: John Baldwin > : > > : > The reason [for masking interrupts] is that PCI interrupts are level > : > triggered, so they won't "shut up" until the ISR has run and pacified > : > the PCI device. > : > : But PCI interrupts can be programmed either level- or edge-triggered, so > : wouldn't programming to edge-triggered interrupts solve the "they won't shut > : up" issue? > > PCI interrupts are level. There's no way to program them otherwise. > > Warner While electrically they are level, the APIC can be programmed to pass them on either level or edge. Once you get into MSI, the distinction becomes very muddy. ScottReceived on Wed Dec 07 2005 - 17:07:40 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:38:48 UTC