UltraRAM is described in "Chapter 2, UltraRAM Resources" of the UltraScale Architecture Memory Resources User Guide (UG573) [Ref 3] as follows:
"UltraRAM is a single-clocked, two port, synchronous memory available in UltraScale+™ devices. Because UltraRAM is compatible with the columnar architecture, multiple UltraRAMs can be instantiated and directly cascaded in an UltraRAM column for the entire height of the device. A column in a single clock region contains 16 UltraRAM blocks. Devices with UltraRAM include multiple UltraRAM columns distributed in the device. Most of the devices in the UltraScale+ family include UltraRAM blocks. For the available quantity of UltraRAM in specific device families, see the UltraScale Architecture and Product Overview (DS890) [Ref 1].
The following files are included in the Coding Examples:
•xilinx_ultraram_single_port_no_change.v
•xilinx_ultraram_single_port_no_change.vhd
•xilinx_ultraram_single_port_read_first.v
•xilinx_ultraram_single_port_read_first.vhd
•xilinx_ultraram_single_port_write_first.v
•xilinx_ultraram_single_port_write_first.vhd
The Vivado tool includes templates of UltraRAM VHDL and Verilog code. The following figure shows the template files.
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X-Ref Target - Figure 4-2 
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See the UltraScale Architecture Memory Resources User Guide (UG573) [Ref 3] for more information.