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.
The following RedBoot configurations are supported:
| Configuration | Mode | Description | File |
|---|---|---|---|
| ROM | [ROM] | RedBoot running from the board's flash boot sector. | redboot_ROM.ecm |
| RAM | [RAM] | RedBoot running from RAM with RedBoot in the flash boot sector. | redboot_RAM.ecm |
| ROMRAM | [ROMRAM] | RedBoot running from RAM, but contained in the board's flash boot sector (EDB7312 only). | redboot_ROMRAM.ecm |
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.
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 EP7xxx timer #2 is used as a polled timer to provide timeout support for network and XModem file transfers.
These shell variables provide the platform-specific information needed for building RedBoot according to the procedure described in Chapter 3:
export TARGET=edb7211 export TARGET=edb7212 export TARGET=edb7312 export ARCH_DIR=arm export PLATFORM_DIR=edb7xxx |
The names of configuration files are listed above with the description of the associated modes.