Intel SA1100 (Brutus)

Overview

RedBoot supports both board serial ports on the Brutus board. The default serial port settings are 38400,8,N,1. flash management is not currently supported.

Two basic RedBoot configurations are supported:

Initial Installation Method

Device programmer is used to program socketecflash parts.

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 - 0x000fffff    Boot ROM
0x08000000 - 0x083fffff    Application flash
0x10000000 - 0x100fffff    SRAM
0x18000000 - 0x180fffff    Chip Select 3
0x20000000 - 0x3fffffff    PCMCIA
0x80000000 - 0xbfffffff    SA-1100 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 - 0x003fffff  Y Y  DRAM Bank 0
0x00400000 - 0x007fffff  Y Y  DRAM Bank 1
0x00800000 - 0x00bfffff  Y Y  DRAM Bank 2
0x00c00000 - 0x00ffffff  Y Y  DRAM Bank 3
0x08000000 - 0x083fffff  Y Y  Application flash
0x10000000 - 0x100fffff  Y N  SRAM
0x20000000 - 0x3fffffff  N N  PCMCIA
0x40000000 - 0x400fffff  Y Y  Boot ROM
0x80000000 - 0xbfffffff  N N  SA-1100 Internal Registers
0xe0000000 - 0xe7ffffff  Y Y  Cache Clean

Resource Usage

The flash based RedBoot image occupies flash addresses 0x40000000 - 0x4000ffff. The RAM based RedBoot image occupies RAM addresses 0x10000 - 0x2ffff. RAM addresses from 0x30000 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 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 “brutus”, “arm” and “sa11x0/brutus” respectively. Note that the configuration export files supplied in the hal/arm/sa11x0/brutus/VERSION/misc directory in the RedBoot source tree should be used.