Emerson MVME7100 manual Startup Sequence

MOTLoad Firmware Startup Sequence

Safe Start, whether invoked by hitting ESC on the console within the first five seconds following power-on reset or by setting the Safe Start jumper, interrupts the scan process. The user may then display the available boot images and select the desired image. The feature is provided to enable recovery in cases when the programmed Alternate Boot Image is no longer desired. The following output is an example of an interactive Safe Start:

ABCDEInteractive Boot Mode Entered boot> ?

Interactive boot commands:

'd':show directory of alternate boot images 'c':continue with normal startup

'q':quit without executing any alternate boot image

'r [address]':execute specified (or default) alternate image 'p [address]':execute specified (or default) POST image '?':this help screen

'h':this help screen boot> d

Addr FFE00000 Size 00100000 Flags 00000003 Name: MOTLoad

Addr FFD00000 Size 00100000 Flags 00000003 Name: MOTLoad boot> c NOPQRSTUVabcdefghijk#lmn3opqrsstuvxyzaWXZ

Copyright Motorola Inc. 1999-2004, All Rights Reserved MOTLoad RTOS Version 2.0, PAL Version 0.b EA02

...

MVME7100>

6.8Startup Sequence

The firmware startup sequence following reset of MOTLoad is to:

zInitialize cache, MMU, FPU, and other CPU internal items

zInitialize the memory controller

zSearch the active flash bank, possibly interactively, for a valid Power On Self Test (POST) image. If found, the POST images executes. Once completed, the POST image returns and startup continues.

zSearch the active flash bank, possibly interactively, for a valid USER boot image. If found, the USER boot image executes. A return to the boot block code is not anticipated.

zIf a valid USER boot image is not found, search the active flash bank, possibly interactively, for a valid Alternate MOTLoad boot image; anticipated to be an upgrade of alternate MOTLoad firmware. If found, the image is executed. A return to the boot block code is not anticipated.

zExecute the recovery image of the firmware in the boot block if no valid USER or alternate MOTLoad image is found

During startup, interactive mode may be entered by either setting the Safe Start jumper/switch or by sending an <ESC> to the console serial port within five seconds of the board reset. During interactive mode, the user has the option to display locations at which valid boot images were discovered, specify which discovered image is to be executed, or specify that the recovery image in the boot block of the active flash bank is to be executed.

98 MVME7100 Single Board Computer Installation and Use (6806800E08A)