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TI81XX PSP EMAC Boot
TI81XX refers to TI816X, TI814X and TI813X.
Contents
Introduction[edit]
This document provides the procedure to boot DM814X and DM813X devices over Ethernet. Ethernet booting can be used for the following.
- End to End booting the device
- Flashing the device over Ethernet
Ethernet Mac ID e-fused device is required for EMAC Boot.
Note: EMAC Boot for DM814X/DM813X is supported from DEV_TI81XXPSP_04.04.00.01 release.
ROM Code Requirements[edit]
ROM code needs these fields in BOOTP reply to be able to work:
- Client IP address
- Tftp server IP (called "next-server")
- Boot file name
In addition, we need these additional optional fields if the TFTP server is in a different subnet:
- subnet mask (option number 1)
- router (option number 3)
The DHCP server should be configured to correctly supply these parameters to all devices.
Boot Mode Switch settings[edit]
SW1---> BTM[4:0] 00100 or 00111, refer switch setting http://processors.wiki.ti.com/index.php/TI81XX_PSP_U-Boot#EVM_Switch_Settings
| BTMODE[9:8] | PHY Mode |
|---|---|
| 00b | MII/GMII |
| 01b | RMII |
| 10b | RGMII |
| 11b | reserved |
Please ensure that only one DHCP server responds to the BOOTP request from the EVM.
Setting in Tftpd32[edit]
Building U-Boot for ETH boot[edit]
DM814X/DM813X[edit]
U-Boot 1st stage[edit]
TI8148 EVM
$ make CROSS_COMPILE=arm-arago-linux-gnueabi- ARCH=arm distclean $ make CROSS_COMPILE=arm-arago-linux-gnueabi- ARCH=arm ti8148_evm_min_eth $ make CROSS_COMPILE=arm-arago-linux-gnueabi- ARCH=arm u-boot.ti
DM813X EVM
$ make CROSS_COMPILE=arm-arago-linux-gnueabi- ARCH=arm distclean $ make CROSS_COMPILE=arm-arago-linux-gnueabi- ARCH=arm ti813x_evm_min_eth $ make CROSS_COMPILE=arm-arago-linux-gnueabi- ARCH=arm u-boot.ti
This will generate a file u-boot.min.eth which has to be used for booting over ethernet.
U-Boot 2nd Stage[edit]
Either SD or NAND u-boot.bin can be taken according to where the environment variables should be stored. Custom environment variable can be added through CONFIG_EXTRA_ENV_SETTINGS to either Flash to memory or End to End booting the device.
TI816X[edit]
No specific Ethernet boot config, any single stage u-boot.bin can be used for booting the Device over ethernet.
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