ref: 1d0b9d7088f61fd3e28dada8e8e97abf3eac69f9
dir: /sys/src/9/lx2k/io.h/
enum { IRQfiq = -1, PPI = 16, SPI = 32, IRQcntps = PPI+13, IRQcntpns = PPI+14, IRQuart = SPI+32, IRQusb1 = SPI+80, IRQusb2 = SPI+81, IRQpci3 = SPI+119, IRQpci5 = SPI+129, }; #define BUSUNKNOWN (-1) #define PCIWINDOW 0 #define PCIWADDR(x) (PADDR(x)+PCIWINDOW)