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hw/net/xilinx_ethlite: Map RESERVED I/O as unimplemented

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In order to track access to reserved I/O space, use yet
another UnimplementedDevice covering the whole device
memory range. Mapped with lower priority (-1).

The memory flat view becomes:

  (qemu) info mtree -f
  FlatView #0
   Root memory region: system
    0000000081000000-00000000810007e3 (prio 0, ram): ethlite.tx[0]buf
    00000000810007e4-00000000810007f3 (prio 0, i/o): ethlite.mdio
    00000000810007f4-00000000810007ff (prio 0, i/o): ethlite.tx[0]io
    0000000081000800-0000000081000fe3 (prio 0, ram): ethlite.tx[1]buf
    0000000081000fe4-0000000081000ff3 (prio -1, i/o): ethlite.reserved @0000000000000fe4
    0000000081000ff4-0000000081000fff (prio 0, i/o): ethlite.tx[1]io
    0000000081001000-00000000810017e3 (prio 0, ram): ethlite.rx[0]buf
    00000000810017e4-00000000810017fb (prio -1, i/o): ethlite.reserved @00000000000017e4
    00000000810017fc-00000000810017ff (prio 0, i/o): ethlite.rx[0]io
    0000000081001800-0000000081001fe3 (prio 0, ram): ethlite.rx[1]buf
    0000000081001fe4-0000000081001ffb (prio -1, i/o): ethlite.reserved @0000000000001fe4
    0000000081001ffc-0000000081001fff (prio 0, i/o): ethlite.rx[1]io

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20241114210010.34502-20-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2024-11-14 18:46:36 +01:00
parent ce336679b7
commit 74f1caa8c3
1 changed files with 11 additions and 0 deletions
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11
hw/net/xilinx_ethlite.c
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@ -94,6 +94,7 @@ struct XlnxXpsEthLite
uint32_t c_rx_pingpong;
unsigned int port_index; /* dual port RAM index */
UnimplementedDeviceState rsvd;
UnimplementedDeviceState mdio;
XlnxXpsEthLitePort port[2];
};
@ -303,6 +304,16 @@ static void xilinx_ethlite_realize(DeviceState *dev, Error **errp)
memory_region_init(&s->container, OBJECT(dev),
"xlnx.xps-ethernetlite", 0x2000);
object_initialize_child(OBJECT(dev), "ethlite.reserved", &s->rsvd,
TYPE_UNIMPLEMENTED_DEVICE);
qdev_prop_set_string(DEVICE(&s->rsvd), "name", "ethlite.reserved");
qdev_prop_set_uint64(DEVICE(&s->rsvd), "size",
memory_region_size(&s->container));
sysbus_realize(SYS_BUS_DEVICE(&s->rsvd), &error_fatal);
memory_region_add_subregion_overlap(&s->container, 0,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rsvd), 0),
-1);
object_initialize_child(OBJECT(dev), "ethlite.mdio", &s->mdio,
TYPE_UNIMPLEMENTED_DEVICE);
qdev_prop_set_string(DEVICE(&s->mdio), "name", "ethlite.mdio");