RedBoot User's Guide
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# FRV/FRV400 Fujitsu FR-V 400 (MB-93091)

## Overview

RedBoot supports both serial ports, which are available via the stacked serial connectors on the mother board. The topmost port is the default and is considered to be port 0 by RedBoot. The bottommost port is serial port 1. The default serial port settings are 38400,8,N,1.

FLASH management is also supported, but only for the FLASH device in IC7. This arrangement allows for IC8 to retain either the original Fujitsu board firmware, or some application specific contents.

The following RedBoot configurations are supported:

Configuration | Mode | Description | File
--- | --- | --- | ---
ROMRAM | [ROMRAM] | RedBoot running from RAM, but contained in the board's flash boot sector. | redboot_ROMRAM.ecm
RAM | [RAM] | RedBoot running from RAM with RedBoot in the flash boot sector. | redboot_RAM.ecm

## Initial Installation Method

RedBoot can be installed by directly programming the FLASH device in IC7 or by using the Fujitsu provided software to download and install a version into the FLASH device. Complete instructions are provided separately.

## Special RedBoot Commands

None.

## Memory Maps

The memory map of this platform is fixed by the hardware (cannot be changed by software). The only attributes which can be modified are control over cacheability, as noted below.

    Address                 Cache?      Resource
    00000000-03EFFFFF         Yes       SDRAM (via plugin DIMM)
    03F00000-03FFFFFF         No        SDRAM (used for PCI window)
    10000000-1FFFFFFF         No        MB86943 PCI bridge
    20000000-201FFFFF         No        SRAM
    21000000-23FFFFFF         No        Motherboard resources
    24000000-25FFFFFF         No        PCI I/O space
    26000000-2FFFFFFF         No        PCI Memory space
    30000000-FDFFFFFF         ??        Unused
    FE000000-FEFFFFFF         No        I/O devices
    FF000000-FF1FFFFF         No        IC7 - RedBoot FLASH
    FF200000-FF3FFFFF         No        IC8 - unused FLASH
    FF400000-FFFFFFFF         No        Misc other I/O

> NOTE: The only configuration currently suppored requires a 64MB SDRAM DIMM to be present on the CPU card. No other memory configuration is supported at this time.

## Rebuilding RedBoot

These shell variables provide the platform-specific information needed for building RedBoot according to the procedure described in Chapter 3:

    export TARGET=frv400
    export ARCH_DIR=frv
    export PLATFORM_DIR=frv400

The names of configuration files are listed above with the description of the associated modes.

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