Intel® Quartus® Prime Pro Edition User Guide: Getting Started

ID 683463
Date 10/04/2021
Public

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5.2.4.1. Logic Lock Region Assignment Examples

These examples show the syntax of Logic Lock region assignments in the .qsf file. Optionally, enter these assignments in the Assignment Editor, the Logic Lock Regions Window, or the Chip Planner.

Assign Rectangular Logic Lock Region

Assigns a rectangular Logic Lock region to a lower right corner location of (10,10), and an upper right corner of (20,20) inclusive.

set_instance_assignment –name PLACE_REGION –to a|b|c "X10 Y10 X20 Y20"

Assign Non-Rectangular Logic Lock Region

Assigns instance with full hierarchical path "x|y|z" to non-rectangular L-shaped Logic Lock region. The software treats each set of four numbers as a new box.

set_instance_assignment –name PLACE_REGION –to x|y|z "X10 Y10 X20 Y50; X20 Y10 X50 Y20"

Assign Subordinate Logic Lock Instances

By default, the Intel® Quartus® Prime software constrains every child instance to the Logic Lock region of its parent. Any constraint to a child instance intersects with the constraint of its ancestors. For example, in the following example, all logic beneath “a|b|c|d” constrains to box (10,10), (15,15), and not (0,0), (15,15). This result occurs because the child constraint intersects with the parent constraint.

set_instance_assignment –name PLACE_REGION –to a|b|c "X10 Y10 X20 Y20"
set_instance_assignment –name PLACE_REGION –to a|b|c|d "X0 Y0 X15 Y15"

Assign Multiple Logic Lock Instances

By default, a Logic Lock region constraint allows logic from other instances to share the same region. These assignments place instance c and instance g in the same location. This strategy is useful if instance c and instance g are heavily interacting.

set_instance_assignment –name PLACE_REGION –to a|b|c "X10 Y10 X20 Y20"
set_instance_assignment –name PLACE_REGION –to e|f|g "X10 Y10 X20 Y20"

Assigned Reserved Logic Lock Regions

Optionally reserve an entire Logic Lock region for one instance and any of its subordinate instances.

set_instance_assignment –name PLACE_REGION –to a|b|c "X10 Y10 X20 Y20"
set_instance_assignment –name RESERVE_PLACE_REGION –to a|b|c ON

# The following assignment causes an error. The logic in e|f|g is not
# legally placeable anywhere:
# set_instance_assignment –name PLACE_REGION –to e|f|g "X10 Y10 X20 Y20"

# The following assignment does *not* cause an error, but is effectively
# constrained to the box (20,10), (30,20), since the (10,10),(20,20) box is reserved
# for a|b|c
set_instance_assignment –name PLACE_REGION –to e|f|g "X10 Y10 X30 Y20"

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