网口使用emio连接mii phy芯片，lwIP Echo Server测试例子可以运行，u-boot，linux无法连ping通，能识别到芯片；

我该如何配置u-boot与内核？

关键打印信息：

U-Boot 2019.01 (May 20 2020 - 05:49:03 +0000) Xilinx Zynq ZC706

CPU: Zynq 7z035

Silicon: v3.1

DRAM: ECC disabled 1 GiB

Loading Environment from SPI Flash... SF: Detected n25q512a with page size 256 Bytes, erase size 64 KiB, total 64 MiB

*** Warning - bad CRC, using default environment

In: serial@e0001000

Out: serial@e0001000

Err: serial@e0001000

Net: ZYNQ GEM: e000b000, phyaddr ffffffff, interface gmii

Could not get PHY for eth0: addr -1

eth-1: ethernet@e000b000

U-BOOT for linux

ZYNQ GEM: e000b000, phyaddr ffffffff, interface gmii

mdio_register: non unique device name 'eth0'

ZYNQ GEM: e000b000, phyaddr ffffffff, interface gmii

mdio_register: non unique device name 'eth0'

ZYNQ GEM: e000b000, phyaddr ffffffff, interface gmii

mdio_register: non unique device name 'eth0'

ZYNQ GEM: e000b000, phyaddr ffffffff, interface gmii

mdio_register: non unique device name 'eth0'

No ethernet found.

ZYNQ GEM: e000b000, phyaddr ffffffff, interface gmii

mdio_register: non unique device name 'eth0'

Hit any key to stop autoboot: 0

u-boot> mii info

PHY 0x00: OUI = 0x0885, Model = 0x11, Rev = 0x03, 10baseT, HDX

PHY 0x07: OUI = 0x0885, Model = 0x11, Rev = 0x03, 10baseT, HDX

u-boot> mdio list

eth0:

kernel：

libphy: Fixed MDIO Bus: probed

CAN device driver interface

libphy: MACB_mii_bus: probed

macb e000b000.ethernet eth0: Cadence GEM rev 0x00020118 at 0xe000b000 irq 29 (00:0a:35:00:05:18)

Micrel KSZ8041 e000b000.ethernet-ffffffff:00: attached PHY driver [Micrel KSZ8041] (mii_bus:phy_addr=e000b000.ethernet-f fffffff:00, irq=POLL)

……

Configuring network interfaces... IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready