Slave-Bridge IP is
provided on some data center platforms to let kernels access directly to host memory.
Only certain Alveo cards support the host memory
connection, as reported in the Memory
Information section returned by the
For example, the following information is returned for the Alveo U250 card:
Name: HOST Index: 8 Type: MEM_DRAM Base Address: 0x2000000000 Address Size: 0x400000000 Bank Used: No
Configuring the device binary to connect directly to host memory uses
--connectivity.sp command below.
[connectivity] ## Syntax ##sp=<cu_name>.<interface_name>:HOST sp=cnn_1.weights:HOST
Important: Using host memory also requires changes to the accelerator card setup and your host application as described at Host-Memory Access in the XRT documentation.