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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/mbox_protocol.md | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/mbox_protocol.md b/Documentation/mbox_protocol.md index 0e2c687..3907742 100644 --- a/Documentation/mbox_protocol.md +++ b/Documentation/mbox_protocol.md @@ -137,6 +137,13 @@ Byte 14: Host controlled status reg Byte 15: BMC controlled status reg ``` +Note: when the BMC is writing a response to the mbox registers (as described +above), the "Response Code" (Register 13) must be the last register written to. +Writing register 13 will trigger an interrupt to the host indicating a complete +response has been written. Triggering the interrupt by writing register 13 +prior to completing the response may lead to a data race, and must therefore +be avoided. + ## Low Level Protocol Flow What we essentially have is a set of registers which either the host or BMC can |
