Mailbox IPC

Note

Mailbox IPC only applies to AM62Lx device

Introduction to mailbox ipc channels

This chapter provides information about mailbox ipc channel usage by tifs. Every mailbox ipc channel can be used for unidirectional communication between two hosts. Every mailbox ipc channel is comprised of a mailbox fifo and a memory segment. While the memory segment is used for storing the actual TISCI messages the mailbox fifo is used for storing 32-bit pointers to the messages.

../_images/mailbox_ipc_channel.png

Note:

  1. Every mailbox fifo has space for 4 32-bit message pointers which means that one channel can hold at-most 4 tisci messages at a time.
  2. Every mailbox ipc memory segment has space for 5 tisci messages.
  3. The size of every message slot is 64 bytes though all are not used.