tree 7c39522b8457ca6652c61c79ec3f784d63ebe6e0
parent 0acc669979cc5b1b66c2c4e5d975c60779bedd81
author Alvin Wang <alvinwang@msn.com> 1571153018 +0800
committer Andrew Jeffery <andrew@aj.id.au> 1572321610 +1030

Add backend_adjust_offset to avoid the windows overlap

In mihawk, the windows overlap will cause the cache coherence.
Hostboot writes the SPD data to BMC through a window and read it
back with another window. It causes the data missed and DIMM lost.

Hostboot log
   23.80714|<<DBG-956|SPD::getMemType() - MemType: 0xff, Error: NoHUID: 0x30008.

BMC log: The overlaped windows
  Window @ 0x756e0000 for size 0x00046000 maps flash offset 0x000e7000
  Window @ 0x757e0000 for size 0x00048000 maps flash offset 0x000e5000

Tested: 1. In mihawk, it can fix the SPD cache coherence issue
        2. Add unit test to verify VPNOR offset alignment

Change-Id: I92670ade4e2a91b5c49a0acabfc0456f90d49b93
Signed-off-by: Alvin Wang <alvinwang@msn.com>
[AJ: Remove some MSG_INFO() spam, fix whitespace issues]
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>