Intel SA1110 (Assabet)

Overview

RedBoot supports the board serial port and the compact flash ethernet port. The default serial port settings are 38400,8,N,1. RedBoot also supports flash management on the Assabet. Two basic RedBoot configurations are supported:

Initial Installation Method

A Windows or Linux utility is used to program flash over parallel port driven JTAG interface. See board documentation for details on in situ flash programming.

The flash parts are also socketed and may be programmed in a suitable device programmer.

Flash management

Special RedBoot Commands

None.

Memory Maps

The first level page table is located at physical address 0xc0004000. No second level tables are used.

Physical Address Range     Description
-----------------------    ----------------------------------
0x00000000 - 0x07ffffff    flash
0x08000000 - 0x0fffffff    SA-1111 Board flash
0x10000000 - 0x17ffffff    Board Registers
0x18000000 - 0x1fffffff    Ethernet
0x20000000 - 0x2fffffff    SA-1111 Board PCMCIA
0x30000000 - 0x3fffffff    Compact Flash
0x40000000 - 0x47ffffff    SA-1111 Board
0x48000000 - 0x4bffffff    GFX
0x80000000 - 0xbfffffff    SA-1110 Internal Registers
0xc0000000 - 0xc7ffffff    DRAM Bank 0
0xc8000000 - 0xcfffffff    DRAM Bank 1
0xd0000000 - 0xd7ffffff    DRAM Bank 2
0xd8000000 - 0xdfffffff    DRAM Bank 3
0xe0000000 - 0xe7ffffff    Cache Clean


Virtual Address Range    C B  Description
-----------------------  - -  ----------------------------------
0x00000000 - 0x01ffffff  Y Y  DRAM Bank 0
0x08000000 - 0x0fffffff  Y Y  SA-1111 Board flash
0x10000000 - 0x17ffffff  N N  Board Registers
0x18000000 - 0x1fffffff  N N  Ethernet
0x20000000 - 0x2fffffff  N N  SA-1111 Board PCMCIA
0x30000000 - 0x3fffffff  N N  Compact Flash
0x40000000 - 0x47ffffff  N N  SA-1111 Board
0x48000000 - 0x4bffffff  N N  GFX
0x50000000 - 0x57ffffff  Y Y  flash
0x80000000 - 0xbfffffff  N N  SA-1110 Internal Registers
0xc0000000 - 0xc1ffffff  N Y  DRAM Bank 0
0xe0000000 - 0xe7ffffff  Y Y  Cache Clean
The flash based RedBoot image occupies virtual addresses 0x50000000 - 0x5003ffff.

Resource Usage

The RAM based RedBoot image occupies RAM addresses 0x20000 - 0x5ffff. RAM addresses from 0x60000 to the end of RAM are available for general use such as a temporary scratchpad for downloaded images before they are written to flash.

The SA11x0 OS timer is used as a polled timer to provide timeout support for network and XModem file transfers.

Rebuilding RedBoot

The instructions in Chapter 3 should be followed. The values for TARGET, ARCH_DIR and PLATFORM_DIR on this platform are “assabet”, “arm” and “sa11x0/assabet” respectively. Note that the configuration export files supplied in the hal/arm/sa11x0/assabet/VERSION/misc directory in the RedBoot source tree should be used.