ref: 14cfa56253beb8a2ad8e4700c8c26a6ff6d16ee7
dir: /sys/src/9/bcm64/io.h/
#include "../bcm/io.h"
enum {
	IRQgic		= 160,
	IRQpci		= IRQgic + 20,
	IRQether	= IRQgic + 29,
};
#define PCIWINDOW	soc.pcidmawin
#define PCIWADDR(va)	(PADDR(va)+PCIWINDOW)