ebus: wire up OBIO interrupts to APB pbm via qdev GPIOs
This enables us to remove the static array mapping in the ISA IRQ handler (and the embedded reference to the APB device) by formalising the interrupt wiring via the qdev GPIO API. For more clarity we replace the APB OBIO interrupt numbers with constants designating the interrupt source, and rename isa_irq_handler() to ebus_isa_irq_handler(). Signed-off-by: NMark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: NArtyom Tarasenko <atar4qemu@gmail.com> Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
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