static void spapr_phb_placement(sPAPRMachineState *spapr, uint32_t index, uint64_t *buid, hwaddr *pio, hwaddr *mmio, unsigned n_dma, uint32_t *liobns, Error **errp) { const uint64_t base_buid = 0x800000020000000ULL; const hwaddr phb_spacing = 0x1000000000ULL; /* 64 GiB */ const hwaddr mmio_offset = 0xa0000000; /* 2 GiB + 512 MiB */ const hwaddr pio_offset = 0x80000000; /* 2 GiB */ const uint32_t max_index = 255; const hwaddr phb0_alignment = 0x10000000000ULL; /* 1 TiB */ uint64_t ram_top = MACHINE(spapr)->ram_size; hwaddr phb0_base, phb_base; int i; /* Do we have hotpluggable memory? */ if (MACHINE(spapr)->maxram_size > ram_top) { /* Can't just use maxram_size, because there may be an * alignment gap between normal and hotpluggable memory * regions */ ram_top = spapr->hotplug_memory.base + memory_region_size(&spapr->hotplug_memory.mr); } phb0_base = QEMU_ALIGN_UP(ram_top, phb0_alignment); if (index > max_index) { error_setg(errp, "\"index\" for PAPR PHB is too large (max %u)", max_index); return; } *buid = base_buid + index; for (i = 0; i < n_dma; ++i) { liobns[i] = SPAPR_PCI_LIOBN(index, i); } phb_base = phb0_base + index * phb_spacing; *pio = phb_base + pio_offset; *mmio = phb_base + mmio_offset; }