Reserved Memory Constraint - 2021.2 English

Versal ACAP AI Engine Programming Environment User Guide (UG1076)

Document ID
UG1076
ft:locale
English (United States)
Release Date
2021-12-17
Version
2021.2 English

This constrains the location of system memory (stack and heap) for a kernel to a specific address on a specific tile. The address can be specified in one of two different ways:

  • Column, row, bankID and offset, where the tile is specified by column, row, bankID and the offset address is relative to the bankID, starting at zero with a maximum value of 8192 bytes of a bank.
  • Column, row, and bankId, where the bank ID is relative to the tile and can take values 0, 1, 2, 3.

Syntax

"reserved_memory": <bank_address>
<bank_address> ::= {
  "column": integer,
  "row": integer,
  "bankId": integer,
  "offset": integer
}
<bank_address> ::= {
  "column": integer,
  "row": integer,
  "bankId": integer
}

Example

{
  "NodeConstraints": {
    "mygraph.k1": {
      "reserved_memory": {
        "column": 2,
        "row": 1,
        "bankId": 3, 
        "offset": 4128
      }
    },
    "mygraph.k2": {
      "reserved_memory": {
        "column": 1,
        "row": 1,
        "bankId": 3
      }
    }
  }
}