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hw/net/xilinx_ethlite: Map MDIO registers (as unimplemented)

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Rather than handling the MDIO registers as RAM, map them
as unimplemented I/O within the device MR.

The memory flat view becomes:

  (qemu) info mtree -f
  FlatView #0
   Root memory region: system
    0000000081000000-00000000810007e3 (prio 0, i/o): xlnx.xps-ethernetlite
    00000000810007e4-00000000810007f3 (prio 0, i/o): ethlite.mdio
    00000000810007f4-0000000081001fff (prio 0, i/o): xlnx.xps-ethernetlite @00000000000007f4

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Message-Id: <20241112181044.92193-7-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2024-11-09 19:35:36 +01:00
parent 6909b616ef
commit fa3ca9aa1c
1 changed files with 12 additions and 0 deletions
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12
hw/net/xilinx_ethlite.c
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@ -28,15 +28,18 @@
#include "qemu/osdep.h"
#include "qemu/module.h"
#include "qom/object.h"
#include "qapi/error.h"
#include "exec/tswap.h"
#include "hw/sysbus.h"
#include "hw/irq.h"
#include "hw/qdev-properties.h"
#include "hw/misc/unimp.h"
#include "net/net.h"
#include "trace.h"
#define R_TX_BUF0 0
#define BUFSZ_MAX 0x07e4
#define A_MDIO_BASE 0x07e4
#define R_TX_LEN0 (0x07f4 / 4)
#define R_TX_GIE0 (0x07f8 / 4)
#define R_TX_CTRL0 (0x07fc / 4)
@ -72,6 +75,7 @@ struct XlnxXpsEthLite
uint32_t c_rx_pingpong;
unsigned int port_index; /* dual port RAM index */
UnimplementedDeviceState mdio;
uint32_t regs[R_MAX];
};
@ -232,6 +236,14 @@ static void xilinx_ethlite_realize(DeviceState *dev, Error **errp)
{
XlnxXpsEthLite *s = XILINX_ETHLITE(dev);
object_initialize_child(OBJECT(dev), "ethlite.mdio", &s->mdio,
TYPE_UNIMPLEMENTED_DEVICE);
qdev_prop_set_string(DEVICE(&s->mdio), "name", "ethlite.mdio");
qdev_prop_set_uint64(DEVICE(&s->mdio), "size", 4 * 4);
sysbus_realize(SYS_BUS_DEVICE(&s->mdio), &error_fatal);
memory_region_add_subregion(&s->mmio, A_MDIO_BASE,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mdio), 0));
qemu_macaddr_default_if_unset(&s->conf.macaddr);
s->nic = qemu_new_nic(&net_xilinx_ethlite_info, &s->conf,
object_get_typename(OBJECT(dev)), dev->id,