Il 16/10/2013 11:51, Markus Armbruster ha scritto: > Let me try to elaborate, to make sure I understand. > > Unlike ordinary ISA devices, the i8259 devices need additional wiring, > done by code. > > For instance, board code like pc_q35_init(), pc_piix.c's pc_init1(), > mips_malta_init(), ... wire up their IRQ input lines. The slave's IRQ > output line is wired to the master's IRQ2 in hw/intc/i8259.c for > isa-i8259, and the kernel for kvm-i8259. The master's IRQ output line > is wired up by board code (it's complicated). > > Correct? If yes, I can turn it into a suitable comment.
The wiring of the slave to the master is hardcoded into i8259 code. The wiring of all 16 lines is set up by board code. Paolo
