Hitachi EDK7708 (edk7708)

Overview

RedBoot uses the serial port. The default serial port settings are 38400,8,N,1.

Management of onboard flash is also supported. Two basic RedBoot configurations are supported:

Initial Installation Method

Program the ROM RedBoot image into flash using an eprom programmer.

Flash management

Memory Maps

RedBoot sets up the following memory map on the EDK7708 board.
Physical Address Range  Description
----------------------- -----------
0x80000000 - 0x8001ffff Flash (AT29LV1024)
0x88000000 - 0x881fffff DRAM
0xa4000000 - 0xa40000ff LED ON
0xb8000000 - 0xb80000ff LED ON

Resource Usage

The flash based RedBoot image occupies flash addresses 0x80000000 - 0x8001ffff. RedBoot also reserves RAM (0x88000000 - 0x8800ffff) for RedBoot runtime uses. RAM based RedBoot configurations are designed to run from RAM at physical addresses 0x88010000 - 0x8803ffff. RAM physical addresses from 0x88040000 to the end of RAM are available for general use, such as a temporary scratchpad for downloaded images, before they are written to flash.

Rebuilding RedBoot

The instructions in Chapter 3 should be followed. The values for TARGET, ARCH_DIR and PLATFORM_DIR on this platform are “edk7708”, “sh” and “edk7708” respectively. Note that the configuration export files supplied in the hal/sh/edk7708/VERSION/misc directory in the RedBoot source tree should be used.