SuperH

What’s this?

This file contains status information for the port of U-Boot to the Renesas SuperH series of CPUs.

Overview

SuperH has an original boot loader. However, source code is dirty, and maintenance is not done. To improve sharing and the maintenance of the code, Nobuhiro Iwamatsu started the porting to U-Boot in 2007.

Supported CPUs

Renesas SH7750/SH7750R

This CPU has the SH4 core.

Renesas SH7722

This CPU has the SH4AL-DSP core.

Supported Boards

Hitachi UL MS7750SE01/MS7750RSE01

Board specific code is in board/ms7750se To use this board, type “make ms7750se_config”. Support devices are:

• SCIF

• SDRAM

• NOR Flash

• Marubun PCMCIA

Hitachi UL MS7722SE01

Board specific code is in board/ms7722se To use this board, type “make ms7722se_config”. Support devices are:

• SCIF

• SDRAM

• NOR Flash

• Marubun PCMCIA

• SMC91x ethernet

Hitachi UL MS7720ERP01

Board specific code is in board/ms7720se To use this board, type “make ms7720se_config”. Support devices are:

• SCIF

• SDRAM

• NOR Flash

• Marubun PCMCIA

In SuperH, S-record and binary of made u-boot work on the memory. When u-boot is written in the flash, it is necessary to change the address by using ‘objcopy’:

ex) shX-linux-objcopy -Ibinary -Osrec u-boot.bin u-boot.flash.srec

Compiler

You can use the following of u-boot to compile.

• SuperH Linux Open site

• KPIT GNU tools

Future

I plan to support the following CPUs and boards.

CPUs

• SH7751R(SH4)

Boards

Many boards ;-)