static void gic_dist_writel(void *opaque, hwaddr offset,
                            uint32_t value, MemTxAttrs attrs)
{
    GICState *s = (GICState *)opaque;
    if (offset == 0xf00) {
        int cpu;
        int irq;
        int mask;
        int target_cpu;

        cpu = gic_get_current_cpu(s);
        irq = value & 0x3ff;
        switch ((value >> 24) & 3) {
        case 0:
            mask = (value >> 16) & ALL_CPU_MASK;
            break;
        case 1:
            mask = ALL_CPU_MASK ^ (1 << cpu);
            break;
        case 2:
            mask = 1 << cpu;
            break;
        default:
            DPRINTF("Bad Soft Int target filter\n");
            mask = ALL_CPU_MASK;
            break;
        }
        GIC_DIST_SET_PENDING(irq, mask);
        target_cpu = ctz32(mask);
        while (target_cpu < GIC_NCPU) {
            s->sgi_pending[irq][target_cpu] |= (1 << cpu);
            mask &= ~(1 << target_cpu);
            target_cpu = ctz32(mask);
        }
        gic_update(s);
        return;
    }
    gic_dist_writew(opaque, offset, value & 0xffff, attrs);
    gic_dist_writew(opaque, offset + 2, value >> 16, attrs);
}
Unknown