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MOTLoad Firmware
The MVME7100ET 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
Appendix B, Related
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 MVME7100ET 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 MVME7100ETs IBCA needs to be mapped appropriately through the master's
VMEbus bridge. For example, to use remote start using mailbox 0 on an MVME7100ET
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
UserDefined
ImageKey 1
ImageKey 2
ImageChecksum
ImageSize
ImageName
ImageRamAddress
ImageOffset
ImageFlags
ImageVersion
Reserved
100
Documentation, but are noted here for reference:
Type
unsigned integer
unsigned integer
unsigned integer
unsigned integer
unsigned integer
unsigned character
unsigned integer
unsigned integer
unsigned integer
unsigned integer
unsigned integer
MVME7100ET Single Board Computer Installation and Use (6806800K87G)
Size
Notes
8
User defined
1
0x414c5420
1
0x424f4f54
1
Image checksum
1
Must be a multiple of 4
20
User defined
1
RAM address
1
Offset from header start to entry
Image Flags on page 101
1
Refer to
1
User defined
8
Reserved for expansion
MOTLoad Firmware
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