HelenOS sources

IOWIN             298 kernel/arch/amd64/include/arch/smp/apic.h #define IOWIN     (0x10U / sizeof(uint32_t))
IOWIN             298 kernel/arch/ia32/include/arch/smp/apic.h #define IOWIN     (0x10U / sizeof(uint32_t))
IOWIN              58 uspace/drv/intctl/apic/apic.c #define IOWIN     (0x10U / sizeof(uint32_t))