RedBoot™ User's Guide: Document Version 1.9, February 2003 | ||
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RedBoot supports both serial ports on the board and the ethernet port. The default serial port settings are 38400,8,N,1. RedBoot also supports flash management on the EDB7xxx for the NOR flash only. Two basic RedBoot configurations are supported:
RedBoot running from the board's flash boot sector.
RedBoot running from RAM with RedBoot in the flash boot sector.
EDB7312 only: RedBoot running from RAM copied directly from the flash boot sector.
A Windows or Linux utility is used to program flash using serial port #1 via on-chip programming firmware. See board documentation for details on in situ flash programming.
To update the primary RedBoot images, follow the procedures detailed in the Section called Update the primary RedBoot flash image in Chapter 4, but the actual numbers used with the flags in the sample commands should be:
-f 0xE0000000 -b 0x40000 -l 0x40000 |
To update the secondary RedBoot images, follow the procedures detailed in the Section called Load and start a different version of RedBoot, running from RAM in Chapter 4, but the actual numbers used with the flags in the sample commands should be:
-f 0xE0040000 -b 0x40000 -r 0x40000 -l 0x40000 |
NOTE: On the EDB7312, because the primary RedBoot image runs in RAM and not FLASH, it can be updated directly without use of the separate RAM based version.
The MMU page tables and LCD display buffer, if enabled, are located at the end of DRAM.
NOTE: The virtual memory maps in this section use a C and B column to indicate whether or not the region is cached (C) or buffered (B).
Physical Address Range Description ----------------------- ---------------------------------- 0x00000000 - 0x01ffffff NOR Flash (EDB7211, EDB7212) 0x00000000 - 0x00ffffff NOR Flash (EDB7312) 0x10000000 - 0x11ffffff NAND Flash 0x20000000 - 0x2fffffff Expansion 2 0x30000000 - 0x3fffffff Expansion 3 0x40000000 - 0x4fffffff PCMCIA 0 0x50000000 - 0x5fffffff PCMCIA 1 0x60000000 - 0x600007ff On-chip SRAM 0x80000000 - 0x8fffffff I/O registers 0xc0000000 - 0xc1ffffff DRAM (EDB7211, EDB7212) 0xc0000000 - 0xc0ffffff DRAM (EDB7312) Virtual Address Range C B Description ----------------------- - - ---------------------------------- 0x00000000 - 0x01ffffff Y Y DRAM 0x00000000 - 0x00fcffff Y Y DRAM (EDB7312) 0x20000000 - 0x2fffffff N N Expansion 2 0x30000000 - 0x3fffffff N N Expansion 3 0x40000000 - 0x4fffffff N N PCMCIA 0 0x50000000 - 0x5fffffff N N PCMCIA 1 0x60000000 - 0x600007ff Y Y On-chip SRAM 0x80000000 - 0x8fffffff N N I/O registers 0xc0000000 - 0xc001ffff N Y LCD buffer (if configured) 0xe0000000 - 0xe1ffffff Y Y NOR Flash (EDB7211, EDB7212) 0xe0000000 - 0xe0ffffff Y Y NOR Flash (EDB7312) 0xf0000000 - 0xf1ffffff Y Y NAND Flash The flash based RedBoot image occupies virtual addresses 0xe0000000 - 0xe003ffff. |
The RAM based RedBoot image occupies RAM addresses 0x40000 - 0x7ffff. The ROMRAM based RedBoot image (EDB7312 only) occupies RAM addresses 0x1000 - 0x3ffff. RAM addresses start at 0x80000 and continue up to the top of the installed physical RAM size, less the memory reserved for MMU page tables (0x9000 bytes) and the LCD display buffer, if enabled (0x20000 bytes). The RAM is available for general use such as a temporary scratchpad for downloaded images before they are written to flash.
The EP7xxx timer #2 is used as a polled timer to provide timeout support for network and XModem file transfers.
The instructions in Chapter 3 should be followed. The values for ARCH_DIR and PLATFORM_DIR on this platform are “arm” and “edb7xxx” respectively. The value for TARGET is either “edb7211” or “edb7212” or “edb7312”, depending on the desired platform. Note that the configuration export files supplied in the hal/arm/edb7xxx/VERSION/misc directory in the RedBoot source tree should be used, and the correct edb7XXX variant chosen.