qemu/hw/core/platform-bus.c
/*
 * Loop through all sysbus devices and look for unassigned IRQ lines as well as
 * unassociated MMIO regions. Connect them to the platform bus if available.
 */
Loop through all sysbus devices and look for unassigned IRQ lines as well as
unassociated MMIO regions. Connect them to the platform bus if available.
Loop through all sysbus devices and look for unassigned IRQ lines as well as unassociated MMIO regions . Connect them to the platform bus if available .
static void plaform_bus_refresh_irqs(PlatformBusDevice *pbus)
{
    bitmap_zero(pbus->used_irqs, pbus->num_irqs);
    foreach_dynamic_sysbus_device(platform_bus_count_irqs, pbus);
}
static void plaform_bus_refresh_irqs ( PlatformBusDevice * pbus ) { bitmap_zero ( pbus -> used_irqs , pbus -> num_irqs ) ; foreach_dynamic_sysbus_device ( platform_bus_count_irqs , pbus ) ; }
Loop through all sysbus devices and look for unassigned IRQ lines as well as
 unassociated MMIO regions.
Loop through all sysbus devices and look for unassigned IRQ lines as well as unassociated MMIO regions .