7 boot images, Motload firmware – Artesyn MVME4100ET Single Board Computer Installation and Use (June 2014) User Manual
Page 104
MOTLoad Firmware
MVME4100ET Single Board Computer Installation and Use (6806800K76F)
104
For further details on CR/CSR space, refer to the VME64 Specification, listed in
.
The MVME4100ET uses a TSi148 for its PCI/X-to-VME bus bridge. The offsets of the mailboxes
in the TSi148 are defined in the TSi148 VMEBus PCI/X-to-VME User Manual, listed in
, but are listed here for reference:
Mailbox 0 is at offset 7f610 in the CR/CSR space
Mailbox 1 is at offset 7f614 in the CR/CSR space
Mailbox 2 is at offset 7f618 in the CR/CSR space
Mailbox 3 is at offset 7f61C in the CR/CSR space
The selection of the mailbox used by remote start on an individual MVME4100ET is determined
by the setting of a global environment variable (GEV). The default mailbox is zero. Another GEV
controls whether remote start is enabled (default) or disabled. Refer to the Remote Start
appendix in the MOTLoad Firmware Package User's Manual for remote start GEV definitions.
The MVME4100ET’s IBCA needs to be mapped appropriately through the master’s VMEbus
bridge. For example, to use remote start using mailbox 0 on an MVME4100ET installed in slot
5, the master would need a mapping to support reads and writes of address 0x002ff610 in VME
CR/CSR space (0x280000 + 0x7f610).
6.7
Boot Images
Valid boot images whether POST, USER, or Alternate MOTLoad, are located on 1 MB boundaries
within the upper 8 MB of flash. The image may exceed 1 MB in size. An image is determined
valid through the presence of two "valid image keys" and other sanity checks. A valid boot
image begins with a structure as defined in the following table:
Name
Type
Size
Notes
UserDefined
unsigned integer
8
User defined
ImageKey 1
unsigned integer
1
0x414c5420
ImageKey 2
unsigned integer
1
0x424f4f54
ImageChecksum
unsigned integer
1
Image checksum
ImageSize
unsigned integer
1
Must be a multiple of 4
ImageName
unsigned character
20
User defined