[OpenBIOS] Solaris 8: ESP device enumeration issue
mark.cave-ayland at siriusit.co.uk
Sun Feb 20 21:28:57 CET 2011
On 20/02/11 15:27, Mark Cave-Ayland wrote:
> So it seems to be this setting of the PSR register which is causing the
> fatal trap.
Some more hacking around with gdb on qemu shows that actually in fact,
the spurious interrupts being generated are not related to the DMA
transfers but have exception_index 0x1f which translates to IRQ 15.
Searching on the internet seems to suggest that IRQ 15 is used for
distributing interrupts on multi-processor systems - so perhaps it is
related to OpenBIOS' SMP setup? With a conditional breakpoint, I can see
that they only start appearing upon activation of the first DMA transfer
initiated by the Solaris kernel.
Mark Cave-Ayland - Senior Technical Architect
PostgreSQL - PostGIS
Sirius Corporation plc - control through freedom
t: +44 870 608 0063
Sirius Labs: http://www.siriusit.co.uk/labs
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