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Re: [Qemu-devel] [PATCH v5 07/11] hw/m68k: add Nubus support


From: Mark Cave-Ayland
Subject: Re: [Qemu-devel] [PATCH v5 07/11] hw/m68k: add Nubus support
Date: Tue, 30 Oct 2018 10:23:44 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1

On 30/10/2018 06:47, Hervé Poussineau wrote:

> Le 29/10/2018 à 14:39, Mark Cave-Ayland a écrit :
>> From: Laurent Vivier <address@hidden>
>>
>> Co-developed-by: Mark Cave-Ayland <address@hidden>
>> Signed-off-by: Mark Cave-Ayland <address@hidden>
>> Signed-off-by: Laurent Vivier <address@hidden>
>> ---
>>   hw/Makefile.objs                    |   1 +
>>   hw/nubus/Makefile.objs              |   4 +
>>   hw/nubus/mac-nubus-bridge.c         |  45 ++++++++
>>   hw/nubus/nubus-bridge.c             |  34 ++++++
>>   hw/nubus/nubus-bus.c                | 111 +++++++++++++++++++
>>   hw/nubus/nubus-device.c             | 214 
>> ++++++++++++++++++++++++++++++++++++
>>   include/hw/nubus/mac-nubus-bridge.h |  24 ++++
>>   include/hw/nubus/nubus.h            |  69 ++++++++++++
>>   8 files changed, 502 insertions(+)
>>   create mode 100644 hw/nubus/Makefile.objs
>>   create mode 100644 hw/nubus/mac-nubus-bridge.c
>>   create mode 100644 hw/nubus/nubus-bridge.c
>>   create mode 100644 hw/nubus/nubus-bus.c
>>   create mode 100644 hw/nubus/nubus-device.c
>>   create mode 100644 include/hw/nubus/mac-nubus-bridge.h
>>   create mode 100644 include/hw/nubus/nubus.h
>>
>> diff --git a/hw/Makefile.objs b/hw/Makefile.objs
>> index 39d882af6f..92dc338759 100644
>> --- a/hw/Makefile.objs
>> +++ b/hw/Makefile.objs
>> @@ -36,6 +36,7 @@ devices-dirs-$(CONFIG_SOFTMMU) += watchdog/
>>   devices-dirs-$(CONFIG_SOFTMMU) += xen/
>>   devices-dirs-$(CONFIG_MEM_DEVICE) += mem/
>>   devices-dirs-$(CONFIG_SOFTMMU) += smbios/
>> +devices-dirs-$(CONFIG_NUBUS) += nubus/
>>   devices-dirs-y += core/
>>   common-obj-y += $(devices-dirs-y)
>>   obj-y += $(devices-dirs-y)
>> diff --git a/hw/nubus/Makefile.objs b/hw/nubus/Makefile.objs
>> new file mode 100644
>> index 0000000000..ebb050a4ad
>> --- /dev/null
>> +++ b/hw/nubus/Makefile.objs
>> @@ -0,0 +1,4 @@
>> +common-obj-y += nubus-device.o
>> +common-obj-y += nubus-bus.o
>> +common-obj-y += nubus-bridge.o
>> +common-obj-$(CONFIG_MAC) += mac-nubus-bridge.o
>> diff --git a/hw/nubus/mac-nubus-bridge.c b/hw/nubus/mac-nubus-bridge.c
>> new file mode 100644
>> index 0000000000..7c329300b8
>> --- /dev/null
>> +++ b/hw/nubus/mac-nubus-bridge.c
>> @@ -0,0 +1,45 @@
>> +/*
>> + *  Copyright (c) 2013-2018 Laurent Vivier <address@hidden>
>> + *
>> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
>> + * See the COPYING file in the top-level directory.
>> + *
>> + */
>> +
>> +#include "qemu/osdep.h"
>> +#include "hw/sysbus.h"
>> +#include "hw/nubus/mac-nubus-bridge.h"
>> +
>> +
>> +static void mac_nubus_bridge_init(Object *obj)
>> +{
>> +    MacNubusState *s = MAC_NUBUS_BRIDGE(obj);
>> +    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
>> +
>> +    s->bus = NUBUS_BUS(qbus_create(TYPE_NUBUS_BUS, DEVICE(s), NULL));
>> +
>> +    sysbus_init_mmio(sbd, &s->bus->super_slot_io);
>> +    sysbus_init_mmio(sbd, &s->bus->slot_io);
>> +}
>> +
>> +static void mac_nubus_bridge_class_init(ObjectClass *klass, void *data)
>> +{
>> +    DeviceClass *dc = DEVICE_CLASS(klass);
>> +
>> +    dc->desc = "Nubus bridge";
>> +}
>> +
>> +static const TypeInfo mac_nubus_bridge_info = {
>> +    .name          = TYPE_MAC_NUBUS_BRIDGE,
>> +    .parent        = TYPE_NUBUS_BRIDGE,
>> +    .instance_init = mac_nubus_bridge_init,
>> +    .instance_size = sizeof(MacNubusState),
>> +    .class_init    = mac_nubus_bridge_class_init,
>> +};
>> +
>> +static void mac_nubus_bridge_register_types(void)
>> +{
>> +    type_register_static(&mac_nubus_bridge_info);
>> +}
>> +
>> +type_init(mac_nubus_bridge_register_types)
>> diff --git a/hw/nubus/nubus-bridge.c b/hw/nubus/nubus-bridge.c
>> new file mode 100644
>> index 0000000000..cd8c6a91eb
>> --- /dev/null
>> +++ b/hw/nubus/nubus-bridge.c
>> @@ -0,0 +1,34 @@
>> +/*
>> + * QEMU Macintosh Nubus
>> + *
>> + * Copyright (c) 2013-2018 Laurent Vivier <address@hidden>
>> + *
>> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
>> + * See the COPYING file in the top-level directory.
>> + *
>> + */
>> +
>> +#include "qemu/osdep.h"
>> +#include "hw/sysbus.h"
>> +#include "hw/nubus/nubus.h"
>> +
>> +static void nubus_bridge_class_init(ObjectClass *klass, void *data)
>> +{
>> +    DeviceClass *dc = DEVICE_CLASS(klass);
>> +
>> +    dc->fw_name = "nubus";
>> +}
>> +
>> +static const TypeInfo nubus_bridge_info = {
>> +    .name          = TYPE_NUBUS_BRIDGE,
>> +    .parent        = TYPE_SYS_BUS_DEVICE,
>> +    .instance_size = sizeof(SysBusDevice),
>> +    .class_init    = nubus_bridge_class_init,
>> +};
>> +
>> +static void nubus_register_types(void)
>> +{
>> +    type_register_static(&nubus_bridge_info);
>> +}
>> +
>> +type_init(nubus_register_types)
>> diff --git a/hw/nubus/nubus-bus.c b/hw/nubus/nubus-bus.c
>> new file mode 100644
>> index 0000000000..448fa95600
>> --- /dev/null
>> +++ b/hw/nubus/nubus-bus.c
>> @@ -0,0 +1,111 @@
>> +/*
>> + * QEMU Macintosh Nubus
>> + *
>> + * Copyright (c) 2013-2018 Laurent Vivier <address@hidden>
>> + *
>> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
>> + * See the COPYING file in the top-level directory.
>> + *
>> + */
>> +
>> +#include "qemu/osdep.h"
>> +#include "hw/nubus/nubus.h"
>> +#include "hw/sysbus.h"
>> +#include "qapi/error.h"
>> +
>> +
>> +static NubusBus *nubus_find(void)
>> +{
>> +    /* Returns NULL unless there is exactly one nubus device */
>> +    return NUBUS_BUS(object_resolve_path_type("", TYPE_NUBUS_BUS, NULL));
>> +}
>> +
>> +static void nubus_slot_write(void *opaque, hwaddr addr, uint64_t val,
>> +                             unsigned int size)
>> +{
>> +    return;
>> +}
> 
> Useless return. In some other functions (like nubus_fblock_write), you don't 
> have a
> return statement, but a comment saying "READ-ONLY".

Hmmm that's true (and probably something that I introduced when switching over 
to
qdev). I'll remove the return from the next revision, and update the comments 
to be
more consistent.

>> +
>> +
>> +static uint64_t nubus_slot_read(void *opaque, hwaddr addr,
>> +                                unsigned int size)
>> +{
>> +    return 0;
>> +}
> 
> Empty read function. Can your nubus slot be replaced by an "empty_slot" or an
> "unimplemented device"?

AFAICT the nubus devices are addressed directly from the bus, so effectively 
what
this is doing is defining the default bus behaviour when a device isn't 
present. Note
that a separate memory region container for each slot range is created as part 
of the
NubusDevice realize function so each "plugged" slot is represented clearly in 
the
"info mtree" output.

>> +
>> +static const MemoryRegionOps nubus_slot_ops = {
>> +    .read  = nubus_slot_read,
>> +    .write = nubus_slot_write,
>> +    .endianness = DEVICE_BIG_ENDIAN,
>> +    .valid = {
>> +        .min_access_size = 1,
>> +        .max_access_size = 1,
>> +    },
>> +};
>> +
>> +static void nubus_super_slot_write(void *opaque, hwaddr addr, uint64_t val,
>> +                                   unsigned int size)
>> +{
>> +    return;
>> +}
> 
> Useless return. In some other functions (like nubus_fblock_write), you don't 
> have a
> return statement, but a comment saying "READ-ONLY".

I'll update this too.

>> +
>> +static uint64_t nubus_super_slot_read(void *opaque, hwaddr addr,
>> +                                      unsigned int size)
>> +{
>> +    return 0;
>> +}
> 
> Same thing here. Can your nubus super slot be replaced by an "empty_slot" or 
> an
> "unimplemented device"?

... and also here.

>> +
>> +static const MemoryRegionOps nubus_super_slot_ops = {
>> +    .read  = nubus_super_slot_read,
>> +    .write = nubus_super_slot_write,
>> +    .endianness = DEVICE_BIG_ENDIAN,
>> +    .valid = {
>> +        .min_access_size = 1,
>> +        .max_access_size = 1,
>> +    },
>> +};
>> +
>> +static void nubus_realize(BusState *bus, Error **errp)
>> +{
>> +    if (!nubus_find()) {
>> +        error_setg(errp, "at most one %s device is permitted", 
>> TYPE_NUBUS_BUS);
>> +        return;
>> +    }
>> +}
>> +
>> +static void nubus_init(Object *obj)
>> +{
>> +    NubusBus *nubus = NUBUS_BUS(obj);
>> +
>> +    memory_region_init_io(&nubus->super_slot_io, obj, &nubus_super_slot_ops,
>> +                          nubus, "nubus-super-slots",
>> +                          NUBUS_SUPER_SLOT_NB * NUBUS_SUPER_SLOT_SIZE);
>> +
>> +    memory_region_init_io(&nubus->slot_io, obj, &nubus_slot_ops,
>> +                          nubus, "nubus-slots",
>> +                          NUBUS_SLOT_NB * NUBUS_SLOT_SIZE);
>> +
>> +    nubus->current_slot = NUBUS_FIRST_SLOT;
>> +}
>> +
>> +static void nubus_class_init(ObjectClass *oc, void *data)
>> +{
>> +    BusClass *bc = BUS_CLASS(oc);
>> +
>> +    bc->realize = nubus_realize;
>> +}
>> +
>> +static const TypeInfo nubus_bus_info = {
>> +    .name = TYPE_NUBUS_BUS,
>> +    .parent = TYPE_BUS,
>> +    .instance_size = sizeof(NubusBus),
>> +    .instance_init = nubus_init,
>> +    .class_init = nubus_class_init,
>> +};
>> +
>> +static void nubus_register_types(void)
>> +{
>> +    type_register_static(&nubus_bus_info);
>> +}
>> +
>> +type_init(nubus_register_types)
>> diff --git a/hw/nubus/nubus-device.c b/hw/nubus/nubus-device.c
>> new file mode 100644
>> index 0000000000..670a8c4d53
>> --- /dev/null
>> +++ b/hw/nubus/nubus-device.c
>> @@ -0,0 +1,214 @@
>> +/*
>> + * QEMU Macintosh Nubus
>> + *
>> + * Copyright (c) 2013-2018 Laurent Vivier <address@hidden>
>> + *
>> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
>> + * See the COPYING file in the top-level directory.
>> + *
>> + */
>> +
>> +#include "qemu/osdep.h"
>> +#include "hw/nubus/nubus.h"
>> +#include "qapi/error.h"
>> +
>> +
>> +/* The Format Block Structure */
>> +
>> +#define FBLOCK_DIRECTORY_OFFSET 0
>> +#define FBLOCK_LENGTH           4
>> +#define FBLOCK_CRC              8
>> +#define FBLOCK_REVISION_LEVEL   12
>> +#define FBLOCK_FORMAT           13
>> +#define FBLOCK_TEST_PATTERN     14
>> +#define FBLOCK_RESERVED         18
>> +#define FBLOCK_BYTE_LANES       19
>> +
>> +#define FBLOCK_SIZE             20
>> +#define FBLOCK_PATTERN_VAL      0x5a932bc7
>> +
>> +static uint64_t nubus_fblock_read(void *opaque, hwaddr addr, unsigned int 
>> size)
>> +{
>> +    NubusDevice *dev = opaque;
>> +    uint64_t val;
>> +
>> +#define BYTE(v, b) (((v) >> (24 - 8 * (b))) & 0xff)
>> +    switch (addr) {
>> +    case FBLOCK_BYTE_LANES:
>> +        val = dev->byte_lanes;
>> +        val |= (val ^ 0xf) << 4;
>> +        break;
>> +    case FBLOCK_RESERVED:
>> +        val = 0x00;
>> +        break;
>> +    case FBLOCK_TEST_PATTERN...FBLOCK_TEST_PATTERN + 3:
>> +        val = BYTE(FBLOCK_PATTERN_VAL, addr - FBLOCK_TEST_PATTERN);
>> +        break;
>> +    case FBLOCK_FORMAT:
>> +        val = dev->rom_format;
>> +        break;
>> +    case FBLOCK_REVISION_LEVEL:
>> +        val = dev->rom_rev;
>> +        break;
>> +    case FBLOCK_CRC...FBLOCK_CRC + 3:
>> +        val = BYTE(dev->rom_crc, addr - FBLOCK_CRC);
>> +        break;
>> +    case FBLOCK_LENGTH...FBLOCK_LENGTH + 3:
>> +        val = BYTE(dev->rom_length, addr - FBLOCK_LENGTH);
>> +        break;
>> +    case FBLOCK_DIRECTORY_OFFSET...FBLOCK_DIRECTORY_OFFSET + 3:
>> +        val = BYTE(dev->directory_offset, addr - FBLOCK_DIRECTORY_OFFSET);
>> +        break;
>> +    default:
>> +        val = 0;
>> +        break;
>> +    }
>> +    return val;
>> +}
>> +
>> +static void nubus_fblock_write(void *opaque, hwaddr addr, uint64_t val,
>> +                               unsigned int size)
>> +{
>> +    /* READ-ONLY */
>> +}
>> +
>> +static const MemoryRegionOps nubus_format_block_ops = {
>> +    .read = nubus_fblock_read,
>> +    .write = nubus_fblock_write,
>> +    .endianness = DEVICE_BIG_ENDIAN,
>> +    .valid = {
>> +        .min_access_size = 1,
>> +        .max_access_size = 1,
>> +    }
>> +};
>> +
>> +static void nubus_register_format_block(NubusDevice *dev)
>> +{
>> +    char *fblock_name;
>> +
>> +    fblock_name = g_strdup_printf("nubus-slot-%d-format-block",
>> +                                  dev->slot_nb);
>> +
>> +    hwaddr fblock_offset = memory_region_size(&dev->slot_mem) - FBLOCK_SIZE;
>> +    memory_region_init_io(&dev->fblock_io, NULL, &nubus_format_block_ops,
>> +                          dev, fblock_name, FBLOCK_SIZE);
>> +    memory_region_add_subregion(&dev->slot_mem, fblock_offset,
>> +                                &dev->fblock_io);
>> +
>> +    g_free(fblock_name);
>> +}
>> +
>> +static void mac_nubus_rom_write(void *opaque, hwaddr addr, uint64_t val,
>> +                                       unsigned int size)
>> +{
>> +}
> 
> Add a "READ-ONLY" comment?
> 
>> +
>> +static uint64_t mac_nubus_rom_read(void *opaque, hwaddr addr,
>> +                                    unsigned int size)
>> +{
>> +    NubusDevice *dev = opaque;
>> +
>> +    return dev->rom[addr];
>> +}
>> +
>> +static const MemoryRegionOps mac_nubus_rom_ops = {
>> +    .read  = mac_nubus_rom_read,
>> +    .write = mac_nubus_rom_write,
>> +    .endianness = DEVICE_BIG_ENDIAN,
>> +    .valid = {
>> +        .min_access_size = 1,
>> +        .max_access_size = 1,
>> +    },
>> +};
>> +
>> +
>> +void nubus_register_rom(NubusDevice *dev, const uint8_t *rom, uint32_t size,
>> +                        int revision, int format, uint8_t byte_lanes)
>> +{
>> +    hwaddr rom_offset;
>> +    char *rom_name;
>> +
>> +    /* FIXME : really compute CRC */
>> +    dev->rom_length = 0;
>> +    dev->rom_crc = 0;
>> +
>> +    dev->rom_rev = revision;
>> +    dev->rom_format = format;
>> +
>> +    dev->byte_lanes = byte_lanes;
>> +    dev->directory_offset = -size;
>> +
>> +    /* ROM */
>> +
>> +    dev->rom = rom;
>> +    rom_name = g_strdup_printf("nubus-slot-%d-rom", dev->slot_nb);
>> +    memory_region_init_io(&dev->rom_io, NULL, &mac_nubus_rom_ops,
>> +                          dev, rom_name, size);
>> +    memory_region_set_readonly(&dev->rom_io, true);
>> +
>> +    rom_offset = memory_region_size(&dev->slot_mem) - FBLOCK_SIZE +
>> +                 dev->directory_offset;
>> +    memory_region_add_subregion(&dev->slot_mem, rom_offset, &dev->rom_io);
>> +
>> +    g_free(rom_name);
>> +}
>> +
>> +static void nubus_device_realize(DeviceState *dev, Error **errp)
>> +{
>> +    NubusBus *nubus = NUBUS_BUS(qdev_get_parent_bus(DEVICE(dev)));
>> +    NubusDevice *nd = NUBUS_DEVICE(dev);
>> +    char *name;
>> +    hwaddr slot_offset;
>> +
>> +    if (nubus->current_slot < NUBUS_FIRST_SLOT ||
>> +            nubus->current_slot > NUBUS_LAST_SLOT) {
>> +        error_setg(errp, "Cannot register nubus card, not enough slots");
>> +        return;
>> +    }
>> +
>> +    nd->slot_nb = nubus->current_slot++;
>> +    name = g_strdup_printf("nubus-slot-%d", nd->slot_nb);
>> +
>> +    if (nd->slot_nb < NUBUS_FIRST_SLOT) {
>> +        /* Super */
>> +        slot_offset = (nd->slot_nb - 6) * NUBUS_SUPER_SLOT_SIZE;
>> +
>> +        memory_region_init(&nd->slot_mem, OBJECT(dev), name,
>> +                           NUBUS_SUPER_SLOT_SIZE);
>> +        memory_region_add_subregion(&nubus->super_slot_io, slot_offset,
>> +                                    &nd->slot_mem);
>> +    } else {
>> +        /* Normal */
>> +        slot_offset = nd->slot_nb * NUBUS_SLOT_SIZE;
>> +
>> +        memory_region_init(&nd->slot_mem, OBJECT(dev), name, 
>> NUBUS_SLOT_SIZE);
>> +        memory_region_add_subregion(&nubus->slot_io, slot_offset,
>> +                                    &nd->slot_mem);
>> +    }
>> +
>> +    g_free(name);
>> +    nubus_register_format_block(nd);
>> +}
>> +
>> +static void nubus_device_class_init(ObjectClass *oc, void *data)
>> +{
>> +    DeviceClass *dc = DEVICE_CLASS(oc);
>> +
>> +    dc->realize = nubus_device_realize;
>> +    dc->bus_type = TYPE_NUBUS_BUS;
>> +}
>> +
>> +static const TypeInfo nubus_device_type_info = {
>> +    .name = TYPE_NUBUS_DEVICE,
>> +    .parent = TYPE_DEVICE,
>> +    .abstract = true,
>> +    .instance_size = sizeof(NubusDevice),
>> +    .class_init = nubus_device_class_init,
>> +};
>> +
>> +static void nubus_register_types(void)
>> +{
>> +    type_register_static(&nubus_device_type_info);
>> +}
>> +
>> +type_init(nubus_register_types)
>> diff --git a/include/hw/nubus/mac-nubus-bridge.h 
>> b/include/hw/nubus/mac-nubus-bridge.h
>> new file mode 100644
>> index 0000000000..ce9c789d99
>> --- /dev/null
>> +++ b/include/hw/nubus/mac-nubus-bridge.h
>> @@ -0,0 +1,24 @@
>> +/*
>> + * Copyright (c) 2013-2018 Laurent Vivier <address@hidden>
>> + *
>> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
>> + * See the COPYING file in the top-level directory.
>> + *
>> + */
>> +
>> +#ifndef HW_NUBUS_MAC_H
>> +#define HW_NUBUS_MAC_H
>> +
>> +#include "hw/nubus/nubus.h"
>> +
>> +#define TYPE_MAC_NUBUS_BRIDGE "mac-nubus-bridge"
>> +#define MAC_NUBUS_BRIDGE(obj) OBJECT_CHECK(MacNubusState, (obj), \
>> +                                           TYPE_MAC_NUBUS_BRIDGE)
>> +
>> +typedef struct MacNubusState {
>> +    SysBusDevice sysbus_dev;
>> +
>> +    NubusBus *bus;
>> +} MacNubusState;
>> +
>> +#endif
>> diff --git a/include/hw/nubus/nubus.h b/include/hw/nubus/nubus.h
>> new file mode 100644
>> index 0000000000..096bafb322
>> --- /dev/null
>> +++ b/include/hw/nubus/nubus.h
>> @@ -0,0 +1,69 @@
>> +/*
>> + * Copyright (c) 2013-2018 Laurent Vivier <address@hidden>
>> + *
>> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
>> + * See the COPYING file in the top-level directory.
>> + *
>> + */
>> +
>> +#ifndef HW_NUBUS_NUBUS_H
>> +#define HW_NUBUS_NUBUS_H
>> +
>> +#include "hw/qdev.h"
>> +#include "exec/address-spaces.h"
>> +
>> +#define NUBUS_SUPER_SLOT_SIZE 0x10000000U
>> +#define NUBUS_SUPER_SLOT_NB   0x9
>> +
>> +#define NUBUS_SLOT_SIZE       0x01000000
>> +#define NUBUS_SLOT_NB         0xF
>> +
>> +#define NUBUS_FIRST_SLOT      0x9
>> +#define NUBUS_LAST_SLOT       0xF
>> +
>> +#define TYPE_NUBUS_DEVICE "nubus-device"
>> +#define NUBUS_DEVICE(obj) \
>> +     OBJECT_CHECK(NubusDevice, (obj), TYPE_NUBUS_DEVICE)
>> +
>> +#define TYPE_NUBUS_BUS "nubus-bus"
>> +#define NUBUS_BUS(obj) OBJECT_CHECK(NubusBus, (obj), TYPE_NUBUS_BUS)
>> +
>> +#define TYPE_NUBUS_BRIDGE "nubus-bridge"
>> +#define NUBUS_BRIDGE(obj) OBJECT_CHECK(NubusBridge, (obj), 
>> TYPE_NUBUS_BRIDGE)
>> +
>> +typedef struct NubusBus {
>> +    BusState qbus;
>> +
>> +    MemoryRegion super_slot_io;
>> +    MemoryRegion slot_io;
>> +
>> +    int current_slot;
>> +} NubusBus;
>> +
>> +typedef struct NubusDevice {
>> +    DeviceState qdev;
>> +
>> +    int slot_nb;
>> +    MemoryRegion slot_mem;
>> +
>> +    /* Format Block */
>> +
>> +    MemoryRegion fblock_io;
>> +
>> +    uint32_t rom_length;
>> +    uint32_t rom_crc;
>> +    uint8_t rom_rev;
>> +    uint8_t rom_format;
>> +    uint8_t byte_lanes;
>> +    int32_t directory_offset;
>> +
>> +    /* ROM */
>> +
>> +    MemoryRegion rom_io;
>> +    const uint8_t *rom;
>> +} NubusDevice;
>> +
>> +void nubus_register_rom(NubusDevice *dev, const uint8_t *rom, uint32_t size,
>> +                        int revision, int format, uint8_t byte_lanes);
>> +
>> +#endif


ATB,

Mark.



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