For various memory mapped master and slave interfaces, IP integrator follows the industry standard IP-XACT data format for capturing memory requirements and capabilities of endpoint masters and slaves. This section provides an overview of how IP integrator models address information on a memory-mapped slave.
Master interfaces have address spaces, or address_space objects. Slave
interfaces have an address_space container called a memory map to map the slave to
the address space of the associated master. Typically, these memory maps are named
after the slave interface pins, for example
though that is not required.
The memory map for each slave interface pin contains address segments, or address_segment objects. These address segments correspond to the address decode window for that slave. A typical AXI4-Lite slave will have only one address segment, representing a range of addresses. However, some slaves, like a bridge, will have multiple address segments or a range of addresses for each address decode window.
When you map a slave to the master address space, a master address_segment object is created, mapping the address segments of the slave to the master. The Vivado IP integrator can automatically assign addresses for all slaves in the design. However, you can also manually assign the addresses using the Address Editor. In the Address Editor, you see the address segments of the slaves, and can map them to address spaces in the masters.
- Click the Address Editor tab to show the memory map of all the slaves in the
design.Note: If the Address Editor tab is not visible then select from the main menu.
- Right-click anywhere in the Address Editor and select Assign All.
This command maps slave address segments to master address spaces, thereby creating address segments in the master. You can change these automatic addresses later by clicking in the corresponding column and changing the values.
Alternatively, you can also click on the Assign All button on the Address Editor toolbar to automatically assign the addresses.
The Auto Assign Address dialog box is displayed.
- Click OK.
The Address Editor should now look like the following figure:
- Change the size of the address segments for the AXI BRAM Controller core.
Click the Range column, and select 64K from the drop-down menu, shown in the following figure:
- Select the Diagram tab, to return to the IP integrator design canvas.