static uint64_t apb_config_readl (void *opaque, target_phys_addr_t addr, unsigned size) { APBState *s = opaque; uint32_t val; switch (addr & 0xffff) { case 0x30 ... 0x4f: /* DMA error registers */ val = 0; /* XXX: not implemented yet */ break; case 0x200 ... 0x20b: /* IOMMU */ val = s->iommu[(addr & 0xf) >> 2]; break; case 0x20c ... 0x3ff: /* IOMMU flush */ val = 0; break; case 0xc00 ... 0xc3f: /* PCI interrupt control */ if (addr & 4) { val = s->pci_irq_map[(addr & 0x3f) >> 3]; } else { val = 0; } break; case 0x1000 ... 0x1080: /* OBIO interrupt control */ if (addr & 4) { val = s->obio_irq_map[(addr & 0xff) >> 3]; } else { val = 0; } break; case 0x2000 ... 0x202f: /* PCI control */ val = s->pci_control[(addr & 0x3f) >> 2]; break; case 0xf020 ... 0xf027: /* Reset control */ if (addr & 4) { val = s->reset_control; } else { val = 0; } break; case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */ case 0xa400 ... 0xa67f: /* IOMMU diagnostics */ case 0xa800 ... 0xa80f: /* Interrupt diagnostics */ case 0xf000 ... 0xf01f: /* FFB config, memory control */ /* we don't care */ default: val = 0; break; } APB_DPRINTF("%s: addr " TARGET_FMT_lx " -> %x\n", __func__, addr, val); return val; }