[PULL 27/33] ppc/pegasos2: Use Virtual Open Firmware as firmware replacement

[David Gibson <david@gibson.dropbear.id.au>]

From: BALATON Zoltan <balaton@eik.bme.hu>

The pegasos2 board comes with an Open Firmware compliant ROM based on
SmartFirmware but it has some changes that are not open source
therefore the ROM binary cannot be included in QEMU. Guests running on
the board however depend on services provided by the firmware. The
Virtual Open Firmware recently added to QEMU implements a minimal set
of these services to allow some guests to boot without the original
firmware. This patch adds VOF as the default firmware for pegasos2
which allows booting Linux and MorphOS via -kernel option while a ROM
image can still be used with -bios for guests that don't run with VOF.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <1d6ed6f290c5c1f0b5a1e1c51cf1151452d70d9a.1624811233.git.balaton@eik.bme.hu>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/Kconfig    |   1 +
 hw/ppc/pegasos2.c | 602 +++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 601 insertions(+), 2 deletions(-)

diff --git a/hw/ppc/Kconfig b/hw/ppc/Kconfig
index 67630f80e1..7fcafec60a 100644
--- a/hw/ppc/Kconfig
+++ b/hw/ppc/Kconfig
@@ -76,6 +76,7 @@ config PEGASOS2
     select VT82C686
     select IDE_VIA
     select SMBUS_EEPROM
+    select VOF
 # This should come with VT82C686
     select ACPI_X86
 
diff --git a/hw/ppc/pegasos2.c b/hw/ppc/pegasos2.c
index 07971175c9..f1741a4512 100644
--- a/hw/ppc/pegasos2.c
+++ b/hw/ppc/pegasos2.c
@@ -34,13 +34,33 @@
 #include "trace.h"
 #include "qemu/datadir.h"
 #include "sysemu/device_tree.h"
+#include "hw/ppc/vof.h"
 
-#define PROM_FILENAME "pegasos2.rom"
+#include <libfdt.h>
+
+#define PROM_FILENAME "vof.bin"
 #define PROM_ADDR     0xfff00000
 #define PROM_SIZE     0x80000
 
+#define KVMPPC_HCALL_BASE    0xf000
+#define KVMPPC_H_VOF_CLIENT  (KVMPPC_HCALL_BASE + 0x5)
+
+#define H_SUCCESS     0
+#define H_PRIVILEGE  -3  /* Caller not privileged */
+#define H_PARAMETER  -4  /* Parameter invalid, out-of-range or conflicting */
+
 #define BUS_FREQ_HZ 133333333
 
+#define PCI0_MEM_BASE 0xc0000000
+#define PCI0_MEM_SIZE 0x20000000
+#define PCI0_IO_BASE  0xf8000000
+#define PCI0_IO_SIZE  0x10000
+
+#define PCI1_MEM_BASE 0x80000000
+#define PCI1_MEM_SIZE 0x40000000
+#define PCI1_IO_BASE  0xfe000000
+#define PCI1_IO_SIZE  0x10000
+
 #define TYPE_PEGASOS2_MACHINE  MACHINE_TYPE_NAME("pegasos2")
 OBJECT_DECLARE_TYPE(Pegasos2MachineState, MachineClass, PEGASOS2_MACHINE)
 
@@ -48,14 +68,26 @@ struct Pegasos2MachineState {
     MachineState parent_obj;
     PowerPCCPU *cpu;
     DeviceState *mv;
+    Vof *vof;
+    void *fdt_blob;
+    uint64_t kernel_addr;
+    uint64_t kernel_entry;
+    uint64_t kernel_size;
 };
 
+static void *build_fdt(MachineState *machine, int *fdt_size);
+
 static void pegasos2_cpu_reset(void *opaque)
 {
     PowerPCCPU *cpu = opaque;
+    Pegasos2MachineState *pm = PEGASOS2_MACHINE(current_machine);
 
     cpu_reset(CPU(cpu));
     cpu->env.spr[SPR_HID1] = 7ULL << 28;
+    if (pm->vof) {
+        cpu->env.gpr[1] = 2 * VOF_STACK_SIZE - 0x20;
+        cpu->env.nip = 0x100;
+    }
 }
 
 static void pegasos2_init(MachineState *machine)
@@ -92,18 +124,24 @@ static void pegasos2_init(MachineState *machine)
         error_report("Could not find firmware '%s'", fwname);
         exit(1);
     }
+    if (!machine->firmware && !pm->vof) {
+        pm->vof = g_malloc0(sizeof(*pm->vof));
+    }
     memory_region_init_rom(rom, NULL, "pegasos2.rom", PROM_SIZE, &error_fatal);
     memory_region_add_subregion(get_system_memory(), PROM_ADDR, rom);
     sz = load_elf(filename, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 1,
                   PPC_ELF_MACHINE, 0, 0);
     if (sz <= 0) {
-        sz = load_image_targphys(filename, PROM_ADDR, PROM_SIZE);
+        sz = load_image_targphys(filename, pm->vof ? 0 : PROM_ADDR, PROM_SIZE);
     }
     if (sz <= 0 || sz > PROM_SIZE) {
         error_report("Could not load firmware '%s'", filename);
         exit(1);
     }
     g_free(filename);
+    if (pm->vof) {
+        pm->vof->fw_size = sz;
+    }
 
     /* Marvell Discovery II system controller */
     pm->mv = DEVICE(sysbus_create_simple(TYPE_MV64361, -1,
@@ -137,20 +175,185 @@ static void pegasos2_init(MachineState *machine)
 
     /* other PC hardware */
     pci_vga_init(pci_bus);
+
+    if (machine->kernel_filename) {
+        sz = load_elf(machine->kernel_filename, NULL, NULL, NULL,
+                      &pm->kernel_entry, &pm->kernel_addr, NULL, NULL, 1,
+                      PPC_ELF_MACHINE, 0, 0);
+        if (sz <= 0) {
+            error_report("Could not load kernel '%s'",
+                         machine->kernel_filename);
+            exit(1);
+        }
+        pm->kernel_size = sz;
+        if (!pm->vof) {
+            warn_report("Option -kernel may be ineffective with -bios.");
+        }
+    }
+    if (machine->kernel_cmdline && !pm->vof) {
+        warn_report("Option -append may be ineffective with -bios.");
+    }
+}
+
+static void pegasos2_pci_config_write(AddressSpace *as, int bus, uint32_t addr,
+                                      uint32_t len, uint32_t val)
+{
+    hwaddr pcicfg = (bus ? 0xf1000c78 : 0xf1000cf8);
+
+    stl_le_phys(as, pcicfg, addr | BIT(31));
+    switch (len) {
+    case 4:
+        stl_le_phys(as, pcicfg + 4, val);
+        break;
+    case 2:
+        stw_le_phys(as, pcicfg + 4, val);
+        break;
+    case 1:
+        stb_phys(as, pcicfg + 4, val);
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid length\n", __func__);
+        break;
+    }
+}
+
+static void pegasos2_machine_reset(MachineState *machine)
+{
+    Pegasos2MachineState *pm = PEGASOS2_MACHINE(machine);
+    AddressSpace *as = CPU(pm->cpu)->as;
+    void *fdt;
+    uint64_t d[2];
+    int sz;
+
+    qemu_devices_reset();
+    if (!pm->vof) {
+        return; /* Firmware should set up machine so nothing to do */
+    }
+
+    /* Otherwise, set up devices that board firmware would normally do */
+    stl_le_phys(as, 0xf1000000, 0x28020ff);
+    stl_le_phys(as, 0xf1000278, 0xa31fc);
+    stl_le_phys(as, 0xf100f300, 0x11ff0400);
+    stl_le_phys(as, 0xf100f10c, 0x80000000);
+    stl_le_phys(as, 0xf100001c, 0x8000000);
+    pegasos2_pci_config_write(as, 0, PCI_COMMAND, 2, PCI_COMMAND_IO |
+                              PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+    pegasos2_pci_config_write(as, 1, PCI_COMMAND, 2, PCI_COMMAND_IO |
+                              PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 0) << 8) |
+                              PCI_INTERRUPT_LINE, 2, 0x9);
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 0) << 8) |
+                              0x50, 1, 0x2);
+
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 1) << 8) |
+                              PCI_INTERRUPT_LINE, 2, 0x109);
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 1) << 8) |
+                              PCI_CLASS_PROG, 1, 0xf);
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 1) << 8) |
+                              0x40, 1, 0xb);
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 1) << 8) |
+                              0x50, 4, 0x17171717);
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 1) << 8) |
+                              PCI_COMMAND, 2, 0x87);
+
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 2) << 8) |
+                              PCI_INTERRUPT_LINE, 2, 0x409);
+
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 3) << 8) |
+                              PCI_INTERRUPT_LINE, 2, 0x409);
+
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 4) << 8) |
+                              PCI_INTERRUPT_LINE, 2, 0x9);
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 4) << 8) |
+                              0x48, 4, 0xf00);
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 4) << 8) |
+                              0x40, 4, 0x558020);
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 4) << 8) |
+                              0x90, 4, 0xd00);
+
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 5) << 8) |
+                              PCI_INTERRUPT_LINE, 2, 0x309);
+
+    pegasos2_pci_config_write(as, 1, (PCI_DEVFN(12, 6) << 8) |
+                              PCI_INTERRUPT_LINE, 2, 0x309);
+
+    /* Device tree and VOF set up */
+    vof_init(pm->vof, machine->ram_size, &error_fatal);
+    if (vof_claim(pm->vof, 0, VOF_STACK_SIZE, VOF_STACK_SIZE) == -1) {
+        error_report("Memory allocation for stack failed");
+        exit(1);
+    }
+    if (pm->kernel_size &&
+        vof_claim(pm->vof, pm->kernel_addr, pm->kernel_size, 0) == -1) {
+        error_report("Memory for kernel is in use");
+        exit(1);
+    }
+    fdt = build_fdt(machine, &sz);
+    /* FIXME: VOF assumes entry is same as load address */
+    d[0] = cpu_to_be64(pm->kernel_entry);
+    d[1] = cpu_to_be64(pm->kernel_size - (pm->kernel_entry - pm->kernel_addr));
+    qemu_fdt_setprop(fdt, "/chosen", "qemu,boot-kernel", d, sizeof(d));
+
+    qemu_fdt_dumpdtb(fdt, fdt_totalsize(fdt));
+    g_free(pm->fdt_blob);
+    pm->fdt_blob = fdt;
+
+    vof_build_dt(fdt, pm->vof);
+    vof_client_open_store(fdt, pm->vof, "/chosen", "stdout", "/failsafe");
+    pm->cpu->vhyp = PPC_VIRTUAL_HYPERVISOR(machine);
+}
+
+static void pegasos2_hypercall(PPCVirtualHypervisor *vhyp, PowerPCCPU *cpu)
+{
+    Pegasos2MachineState *pm = PEGASOS2_MACHINE(vhyp);
+    CPUPPCState *env = &cpu->env;
+
+    /* The TCG path should also be holding the BQL at this point */
+    g_assert(qemu_mutex_iothread_locked());
+
+    if (msr_pr) {
+        qemu_log_mask(LOG_GUEST_ERROR, "Hypercall made with MSR[PR]=1\n");
+        env->gpr[3] = H_PRIVILEGE;
+    } else if (env->gpr[3] == KVMPPC_H_VOF_CLIENT) {
+        int ret = vof_client_call(MACHINE(pm), pm->vof, pm->fdt_blob,
+                                  env->gpr[4]);
+        env->gpr[3] = (ret ? H_PARAMETER : H_SUCCESS);
+    } else {
+        qemu_log_mask(LOG_GUEST_ERROR, "Unsupported hypercall " TARGET_FMT_lx
+                      "\n", env->gpr[3]);
+        env->gpr[3] = -1;
+    }
+}
+
+static void vhyp_nop(PPCVirtualHypervisor *vhyp, PowerPCCPU *cpu)
+{
+}
+
+static target_ulong vhyp_encode_hpt_for_kvm_pr(PPCVirtualHypervisor *vhyp)
+{
+    return POWERPC_CPU(current_cpu)->env.spr[SPR_SDR1];
 }
 
 static void pegasos2_machine_class_init(ObjectClass *oc, void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
+    PPCVirtualHypervisorClass *vhc = PPC_VIRTUAL_HYPERVISOR_CLASS(oc);
 
     mc->desc = "Genesi/bPlan Pegasos II";
     mc->init = pegasos2_init;
+    mc->reset = pegasos2_machine_reset;
     mc->block_default_type = IF_IDE;
     mc->default_boot_order = "cd";
     mc->default_display = "std";
     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("7400_v2.9");
     mc->default_ram_id = "pegasos2.ram";
     mc->default_ram_size = 512 * MiB;
+
+    vhc->hypercall = pegasos2_hypercall;
+    vhc->cpu_exec_enter = vhyp_nop;
+    vhc->cpu_exec_exit = vhyp_nop;
+    vhc->encode_hpt_for_kvm_pr = vhyp_encode_hpt_for_kvm_pr;
 }
 
 static const TypeInfo pegasos2_machine_info = {
@@ -158,6 +361,10 @@ static const TypeInfo pegasos2_machine_info = {
     .parent        = TYPE_MACHINE,
     .class_init    = pegasos2_machine_class_init,
     .instance_size = sizeof(Pegasos2MachineState),
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_PPC_VIRTUAL_HYPERVISOR },
+        { }
+    },
 };
 
 static void pegasos2_machine_register_types(void)
@@ -166,3 +373,394 @@ static void pegasos2_machine_register_types(void)
 }
 
 type_init(pegasos2_machine_register_types)
+
+/* FDT creation for passing to firmware */
+
+typedef struct {
+    void *fdt;
+    const char *path;
+} FDTInfo;
+
+/* We do everything in reverse order so it comes out right in the tree */
+
+static void dt_ide(PCIBus *bus, PCIDevice *d, FDTInfo *fi)
+{
+    qemu_fdt_setprop_string(fi->fdt, fi->path, "device_type", "spi");
+}
+
+static void dt_usb(PCIBus *bus, PCIDevice *d, FDTInfo *fi)
+{
+    qemu_fdt_setprop_cell(fi->fdt, fi->path, "#size-cells", 0);
+    qemu_fdt_setprop_cell(fi->fdt, fi->path, "#address-cells", 1);
+    qemu_fdt_setprop_string(fi->fdt, fi->path, "device_type", "usb");
+}
+
+static void dt_isa(PCIBus *bus, PCIDevice *d, FDTInfo *fi)
+{
+    GString *name = g_string_sized_new(64);
+    uint32_t cells[3];
+
+    qemu_fdt_setprop_cell(fi->fdt, fi->path, "#size-cells", 1);
+    qemu_fdt_setprop_cell(fi->fdt, fi->path, "#address-cells", 2);
+    qemu_fdt_setprop_string(fi->fdt, fi->path, "device_type", "isa");
+    qemu_fdt_setprop_string(fi->fdt, fi->path, "name", "isa");
+
+    /* addional devices */
+    g_string_printf(name, "%s/lpt@i3bc", fi->path);
+    qemu_fdt_add_subnode(fi->fdt, name->str);
+    qemu_fdt_setprop_cell(fi->fdt, name->str, "clock-frequency", 0);
+    cells[0] = cpu_to_be32(7);
+    cells[1] = 0;
+    qemu_fdt_setprop(fi->fdt, name->str, "interrupts",
+                     cells, 2 * sizeof(cells[0]));
+    cells[0] = cpu_to_be32(1);
+    cells[1] = cpu_to_be32(0x3bc);
+    cells[2] = cpu_to_be32(8);
+    qemu_fdt_setprop(fi->fdt, name->str, "reg", cells, 3 * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fi->fdt, name->str, "device_type", "lpt");
+    qemu_fdt_setprop_string(fi->fdt, name->str, "name", "lpt");
+
+    g_string_printf(name, "%s/fdc@i3f0", fi->path);
+    qemu_fdt_add_subnode(fi->fdt, name->str);
+    qemu_fdt_setprop_cell(fi->fdt, name->str, "clock-frequency", 0);
+    cells[0] = cpu_to_be32(6);
+    cells[1] = 0;
+    qemu_fdt_setprop(fi->fdt, name->str, "interrupts",
+                     cells, 2 * sizeof(cells[0]));
+    cells[0] = cpu_to_be32(1);
+    cells[1] = cpu_to_be32(0x3f0);
+    cells[2] = cpu_to_be32(8);
+    qemu_fdt_setprop(fi->fdt, name->str, "reg", cells, 3 * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fi->fdt, name->str, "device_type", "fdc");
+    qemu_fdt_setprop_string(fi->fdt, name->str, "name", "fdc");
+
+    g_string_printf(name, "%s/timer@i40", fi->path);
+    qemu_fdt_add_subnode(fi->fdt, name->str);
+    qemu_fdt_setprop_cell(fi->fdt, name->str, "clock-frequency", 0);
+    cells[0] = cpu_to_be32(1);
+    cells[1] = cpu_to_be32(0x40);
+    cells[2] = cpu_to_be32(8);
+    qemu_fdt_setprop(fi->fdt, name->str, "reg", cells, 3 * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fi->fdt, name->str, "device_type", "timer");
+    qemu_fdt_setprop_string(fi->fdt, name->str, "name", "timer");
+
+    g_string_printf(name, "%s/rtc@i70", fi->path);
+    qemu_fdt_add_subnode(fi->fdt, name->str);
+    qemu_fdt_setprop_string(fi->fdt, name->str, "compatible", "ds1385-rtc");
+    qemu_fdt_setprop_cell(fi->fdt, name->str, "clock-frequency", 0);
+    cells[0] = cpu_to_be32(8);
+    cells[1] = 0;
+    qemu_fdt_setprop(fi->fdt, name->str, "interrupts",
+                     cells, 2 * sizeof(cells[0]));
+    cells[0] = cpu_to_be32(1);
+    cells[1] = cpu_to_be32(0x70);
+    cells[2] = cpu_to_be32(2);
+    qemu_fdt_setprop(fi->fdt, name->str, "reg", cells, 3 * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fi->fdt, name->str, "device_type", "rtc");
+    qemu_fdt_setprop_string(fi->fdt, name->str, "name", "rtc");
+
+    g_string_printf(name, "%s/keyboard@i60", fi->path);
+    qemu_fdt_add_subnode(fi->fdt, name->str);
+    cells[0] = cpu_to_be32(1);
+    cells[1] = 0;
+    qemu_fdt_setprop(fi->fdt, name->str, "interrupts",
+                     cells, 2 * sizeof(cells[0]));
+    cells[0] = cpu_to_be32(1);
+    cells[1] = cpu_to_be32(0x60);
+    cells[2] = cpu_to_be32(5);
+    qemu_fdt_setprop(fi->fdt, name->str, "reg", cells, 3 * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fi->fdt, name->str, "device_type", "keyboard");
+    qemu_fdt_setprop_string(fi->fdt, name->str, "name", "keyboard");
+
+    g_string_printf(name, "%s/8042@i60", fi->path);
+    qemu_fdt_add_subnode(fi->fdt, name->str);
+    qemu_fdt_setprop_cell(fi->fdt, name->str, "#interrupt-cells", 2);
+    qemu_fdt_setprop_cell(fi->fdt, name->str, "#size-cells", 0);
+    qemu_fdt_setprop_cell(fi->fdt, name->str, "#address-cells", 1);
+    qemu_fdt_setprop_string(fi->fdt, name->str, "interrupt-controller", "");
+    qemu_fdt_setprop_cell(fi->fdt, name->str, "clock-frequency", 0);
+    cells[0] = cpu_to_be32(1);
+    cells[1] = cpu_to_be32(0x60);
+    cells[2] = cpu_to_be32(5);
+    qemu_fdt_setprop(fi->fdt, name->str, "reg", cells, 3 * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fi->fdt, name->str, "device_type", "");
+    qemu_fdt_setprop_string(fi->fdt, name->str, "name", "8042");
+
+    g_string_printf(name, "%s/serial@i2f8", fi->path);
+    qemu_fdt_add_subnode(fi->fdt, name->str);
+    qemu_fdt_setprop_cell(fi->fdt, name->str, "clock-frequency", 0);
+    cells[0] = cpu_to_be32(3);
+    cells[1] = 0;
+    qemu_fdt_setprop(fi->fdt, name->str, "interrupts",
+                     cells, 2 * sizeof(cells[0]));
+    cells[0] = cpu_to_be32(1);
+    cells[1] = cpu_to_be32(0x2f8);
+    cells[2] = cpu_to_be32(8);
+    qemu_fdt_setprop(fi->fdt, name->str, "reg", cells, 3 * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fi->fdt, name->str, "device_type", "serial");
+    qemu_fdt_setprop_string(fi->fdt, name->str, "name", "serial");
+
+    g_string_free(name, TRUE);
+}
+
+static struct {
+    const char *id;
+    const char *name;
+    void (*dtf)(PCIBus *bus, PCIDevice *d, FDTInfo *fi);
+} device_map[] = {
+    { "pci11ab,6460", "host", NULL },
+    { "pci1106,8231", "isa", dt_isa },
+    { "pci1106,571", "ide", dt_ide },
+    { "pci1106,3044", "firewire", NULL },
+    { "pci1106,3038", "usb", dt_usb },
+    { "pci1106,8235", "other", NULL },
+    { "pci1106,3058", "sound", NULL },
+    { NULL, NULL }
+};
+
+static void add_pci_device(PCIBus *bus, PCIDevice *d, void *opaque)
+{
+    FDTInfo *fi = opaque;
+    GString *node = g_string_new(NULL);
+    uint32_t cells[(PCI_NUM_REGIONS + 1) * 5];
+    int i, j;
+    const char *name = NULL;
+    g_autofree const gchar *pn = g_strdup_printf("pci%x,%x",
+                                     pci_get_word(&d->config[PCI_VENDOR_ID]),
+                                     pci_get_word(&d->config[PCI_DEVICE_ID]));
+
+    for (i = 0; device_map[i].id; i++) {
+        if (!strcmp(pn, device_map[i].id)) {
+            name = device_map[i].name;
+            break;
+        }
+    }
+    g_string_printf(node, "%s/%s@%x", fi->path, (name ?: pn),
+                    PCI_SLOT(d->devfn));
+    if (PCI_FUNC(d->devfn)) {
+        g_string_append_printf(node, ",%x", PCI_FUNC(d->devfn));
+    }
+
+    qemu_fdt_add_subnode(fi->fdt, node->str);
+    if (device_map[i].dtf) {
+        FDTInfo cfi = { fi->fdt, node->str };
+        device_map[i].dtf(bus, d, &cfi);
+    }
+    cells[0] = cpu_to_be32(d->devfn << 8);
+    cells[1] = 0;
+    cells[2] = 0;
+    cells[3] = 0;
+    cells[4] = 0;
+    j = 5;
+    for (i = 0; i < PCI_NUM_REGIONS; i++) {
+        if (!d->io_regions[i].size) {
+            continue;
+        }
+        cells[j] = cpu_to_be32(d->devfn << 8 | (PCI_BASE_ADDRESS_0 + i * 4));
+        if (d->io_regions[i].type & PCI_BASE_ADDRESS_SPACE_IO) {
+            cells[j] |= cpu_to_be32(1 << 24);
+        } else {
+            cells[j] |= cpu_to_be32(2 << 24);
+            if (d->io_regions[i].type & PCI_BASE_ADDRESS_MEM_PREFETCH) {
+                cells[j] |= cpu_to_be32(4 << 28);
+            }
+        }
+        cells[j + 1] = 0;
+        cells[j + 2] = 0;
+        cells[j + 3] = cpu_to_be32(d->io_regions[i].size >> 32);
+        cells[j + 4] = cpu_to_be32(d->io_regions[i].size);
+        j += 5;
+    }
+    qemu_fdt_setprop(fi->fdt, node->str, "reg", cells, j * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fi->fdt, node->str, "name", name ?: pn);
+    if (pci_get_byte(&d->config[PCI_INTERRUPT_PIN])) {
+        qemu_fdt_setprop_cell(fi->fdt, node->str, "interrupts",
+                              pci_get_byte(&d->config[PCI_INTERRUPT_PIN]));
+    }
+    /* Pegasos2 firmware has subsystem-id amd subsystem-vendor-id swapped */
+    qemu_fdt_setprop_cell(fi->fdt, node->str, "subsystem-vendor-id",
+                          pci_get_word(&d->config[PCI_SUBSYSTEM_ID]));
+    qemu_fdt_setprop_cell(fi->fdt, node->str, "subsystem-id",
+                          pci_get_word(&d->config[PCI_SUBSYSTEM_VENDOR_ID]));
+    cells[0] = pci_get_long(&d->config[PCI_CLASS_REVISION]);
+    qemu_fdt_setprop_cell(fi->fdt, node->str, "class-code", cells[0] >> 8);
+    qemu_fdt_setprop_cell(fi->fdt, node->str, "revision-id", cells[0] && 0xff);
+    qemu_fdt_setprop_cell(fi->fdt, node->str, "device-id",
+                          pci_get_word(&d->config[PCI_DEVICE_ID]));
+    qemu_fdt_setprop_cell(fi->fdt, node->str, "vendor-id",
+                          pci_get_word(&d->config[PCI_VENDOR_ID]));
+
+    g_string_free(node, TRUE);
+}
+
+static void *build_fdt(MachineState *machine, int *fdt_size)
+{
+    Pegasos2MachineState *pm = PEGASOS2_MACHINE(machine);
+    PowerPCCPU *cpu = pm->cpu;
+    PCIBus *pci_bus;
+    FDTInfo fi;
+    uint32_t cells[16];
+    void *fdt = create_device_tree(fdt_size);
+
+    fi.fdt = fdt;
+
+    /* root node */
+    qemu_fdt_setprop_string(fdt, "/", "CODEGEN,description",
+                            "Pegasos CHRP PowerPC System");
+    qemu_fdt_setprop_string(fdt, "/", "CODEGEN,board", "Pegasos2");
+    qemu_fdt_setprop_string(fdt, "/", "CODEGEN,vendor", "bplan GmbH");
+    qemu_fdt_setprop_string(fdt, "/", "revision", "2B");
+    qemu_fdt_setprop_string(fdt, "/", "model", "Pegasos2");
+    qemu_fdt_setprop_string(fdt, "/", "device_type", "chrp");
+    qemu_fdt_setprop_cell(fdt, "/", "#address-cells", 1);
+    qemu_fdt_setprop_string(fdt, "/", "name", "bplan,Pegasos2");
+
+    /* pci@c0000000 */
+    qemu_fdt_add_subnode(fdt, "/pci@c0000000");
+    cells[0] = 0;
+    cells[1] = 0;
+    qemu_fdt_setprop(fdt, "/pci@c0000000", "bus-range",
+                     cells, 2 * sizeof(cells[0]));
+    qemu_fdt_setprop_cell(fdt, "/pci@c0000000", "pci-bridge-number", 1);
+    cells[0] = cpu_to_be32(PCI0_MEM_BASE);
+    cells[1] = cpu_to_be32(PCI0_MEM_SIZE);
+    qemu_fdt_setprop(fdt, "/pci@c0000000", "reg", cells, 2 * sizeof(cells[0]));
+    cells[0] = cpu_to_be32(0x01000000);
+    cells[1] = 0;
+    cells[2] = 0;
+    cells[3] = cpu_to_be32(PCI0_IO_BASE);
+    cells[4] = 0;
+    cells[5] = cpu_to_be32(PCI0_IO_SIZE);
+    cells[6] = cpu_to_be32(0x02000000);
+    cells[7] = 0;
+    cells[8] = cpu_to_be32(PCI0_MEM_BASE);
+    cells[9] = cpu_to_be32(PCI0_MEM_BASE);
+    cells[10] = 0;
+    cells[11] = cpu_to_be32(PCI0_MEM_SIZE);
+    qemu_fdt_setprop(fdt, "/pci@c0000000", "ranges",
+                     cells, 12 * sizeof(cells[0]));
+    qemu_fdt_setprop_cell(fdt, "/pci@c0000000", "#size-cells", 2);
+    qemu_fdt_setprop_cell(fdt, "/pci@c0000000", "#address-cells", 3);
+    qemu_fdt_setprop_string(fdt, "/pci@c0000000", "device_type", "pci");
+    qemu_fdt_setprop_string(fdt, "/pci@c0000000", "name", "pci");
+
+    fi.path = "/pci@c0000000";
+    pci_bus = mv64361_get_pci_bus(pm->mv, 0);
+    pci_for_each_device_reverse(pci_bus, 0, add_pci_device, &fi);
+
+    /* pci@80000000 */
+    qemu_fdt_add_subnode(fdt, "/pci@80000000");
+    cells[0] = 0;
+    cells[1] = 0;
+    qemu_fdt_setprop(fdt, "/pci@80000000", "bus-range",
+                     cells, 2 * sizeof(cells[0]));
+    qemu_fdt_setprop_cell(fdt, "/pci@80000000", "pci-bridge-number", 0);
+    cells[0] = cpu_to_be32(PCI1_MEM_BASE);
+    cells[1] = cpu_to_be32(PCI1_MEM_SIZE);
+    qemu_fdt_setprop(fdt, "/pci@80000000", "reg", cells, 2 * sizeof(cells[0]));
+    qemu_fdt_setprop_cell(fdt, "/pci@80000000", "8259-interrupt-acknowledge",
+                          0xf1000cb4);
+    cells[0] = cpu_to_be32(0x01000000);
+    cells[1] = 0;
+    cells[2] = 0;
+    cells[3] = cpu_to_be32(PCI1_IO_BASE);
+    cells[4] = 0;
+    cells[5] = cpu_to_be32(PCI1_IO_SIZE);
+    cells[6] = cpu_to_be32(0x02000000);
+    cells[7] = 0;
+    cells[8] = cpu_to_be32(PCI1_MEM_BASE);
+    cells[9] = cpu_to_be32(PCI1_MEM_BASE);
+    cells[10] = 0;
+    cells[11] = cpu_to_be32(PCI1_MEM_SIZE);
+    qemu_fdt_setprop(fdt, "/pci@80000000", "ranges",
+                     cells, 12 * sizeof(cells[0]));
+    qemu_fdt_setprop_cell(fdt, "/pci@80000000", "#size-cells", 2);
+    qemu_fdt_setprop_cell(fdt, "/pci@80000000", "#address-cells", 3);
+    qemu_fdt_setprop_string(fdt, "/pci@80000000", "device_type", "pci");
+    qemu_fdt_setprop_string(fdt, "/pci@80000000", "name", "pci");
+
+    fi.path = "/pci@80000000";
+    pci_bus = mv64361_get_pci_bus(pm->mv, 1);
+    pci_for_each_device_reverse(pci_bus, 0, add_pci_device, &fi);
+
+    qemu_fdt_add_subnode(fdt, "/failsafe");
+    qemu_fdt_setprop_string(fdt, "/failsafe", "device_type", "serial");
+    qemu_fdt_setprop_string(fdt, "/failsafe", "name", "failsafe");
+
+    /* cpus */
+    qemu_fdt_add_subnode(fdt, "/cpus");
+    qemu_fdt_setprop_cell(fdt, "/cpus", "#cpus", 1);
+    qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 1);
+    qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0);
+    qemu_fdt_setprop_string(fdt, "/cpus", "name", "cpus");
+
+    /* FIXME Get CPU name from CPU object */
+    const char *cp = "/cpus/PowerPC,G4";
+    qemu_fdt_add_subnode(fdt, cp);
+    qemu_fdt_setprop_cell(fdt, cp, "l2cr", 0);
+    qemu_fdt_setprop_cell(fdt, cp, "d-cache-size", 0x8000);
+    qemu_fdt_setprop_cell(fdt, cp, "d-cache-block-size",
+                          cpu->env.dcache_line_size);
+    qemu_fdt_setprop_cell(fdt, cp, "d-cache-line-size",
+                          cpu->env.dcache_line_size);
+    qemu_fdt_setprop_cell(fdt, cp, "i-cache-size", 0x8000);
+    qemu_fdt_setprop_cell(fdt, cp, "i-cache-block-size",
+                          cpu->env.icache_line_size);
+    qemu_fdt_setprop_cell(fdt, cp, "i-cache-line-size",
+                          cpu->env.icache_line_size);
+    if (cpu->env.id_tlbs) {
+        qemu_fdt_setprop_cell(fdt, cp, "i-tlb-sets", cpu->env.nb_ways);
+        qemu_fdt_setprop_cell(fdt, cp, "i-tlb-size", cpu->env.tlb_per_way);
+        qemu_fdt_setprop_cell(fdt, cp, "d-tlb-sets", cpu->env.nb_ways);
+        qemu_fdt_setprop_cell(fdt, cp, "d-tlb-size", cpu->env.tlb_per_way);
+        qemu_fdt_setprop_string(fdt, cp, "tlb-split", "");
+    }
+    qemu_fdt_setprop_cell(fdt, cp, "tlb-sets", cpu->env.nb_ways);
+    qemu_fdt_setprop_cell(fdt, cp, "tlb-size", cpu->env.nb_tlb);
+    qemu_fdt_setprop_string(fdt, cp, "state", "running");
+    if (cpu->env.insns_flags & PPC_ALTIVEC) {
+        qemu_fdt_setprop_string(fdt, cp, "altivec", "");
+        qemu_fdt_setprop_string(fdt, cp, "data-streams", "");
+    }
+    /*
+     * FIXME What flags do data-streams, external-control and
+     * performance-monitor depend on?
+     */
+    qemu_fdt_setprop_string(fdt, cp, "external-control", "");
+    if (cpu->env.insns_flags & PPC_FLOAT_FSQRT) {
+        qemu_fdt_setprop_string(fdt, cp, "general-purpose", "");
+    }
+    qemu_fdt_setprop_string(fdt, cp, "performance-monitor", "");
+    if (cpu->env.insns_flags & PPC_FLOAT_FRES) {
+        qemu_fdt_setprop_string(fdt, cp, "graphics", "");
+    }
+    qemu_fdt_setprop_cell(fdt, cp, "reservation-granule-size", 4);
+    qemu_fdt_setprop_cell(fdt, cp, "timebase-frequency",
+                          cpu->env.tb_env->tb_freq);
+    qemu_fdt_setprop_cell(fdt, cp, "bus-frequency", BUS_FREQ_HZ);
+    qemu_fdt_setprop_cell(fdt, cp, "clock-frequency", BUS_FREQ_HZ * 7.5);
+    qemu_fdt_setprop_cell(fdt, cp, "cpu-version", cpu->env.spr[SPR_PVR]);
+    cells[0] = 0;
+    cells[1] = 0;
+    qemu_fdt_setprop(fdt, cp, "reg", cells, 2 * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fdt, cp, "device_type", "cpu");
+    qemu_fdt_setprop_string(fdt, cp, "name", strrchr(cp, '/') + 1);
+
+    /* memory */
+    qemu_fdt_add_subnode(fdt, "/memory@0");
+    cells[0] = 0;
+    cells[1] = cpu_to_be32(machine->ram_size);
+    qemu_fdt_setprop(fdt, "/memory@0", "reg", cells, 2 * sizeof(cells[0]));
+    qemu_fdt_setprop_string(fdt, "/memory@0", "device_type", "memory");
+    qemu_fdt_setprop_string(fdt, "/memory@0", "name", "memory");
+
+    qemu_fdt_add_subnode(fdt, "/chosen");
+    qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
+                            machine->kernel_cmdline ?: "");
+    qemu_fdt_setprop_string(fdt, "/chosen", "name", "chosen");
+
+    qemu_fdt_add_subnode(fdt, "/openprom");
+    qemu_fdt_setprop_string(fdt, "/openprom", "model", "Pegasos2,1.1");
+
+    return fdt;
+}
-- 
2.31.1