Skip to content

fix: initialize the last 4 bytes of mem to zero #149

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
wants to merge 1 commit into
base: main
Choose a base branch
from
Draft

fix: initialize the last 4 bytes of mem to zero #149

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 9 additions & 1 deletion serving/serving_ram.v
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -37,9 +37,17 @@ module serving_ram
o_rdata <= mem[i_raddr];
end

initial
initial begin
if(|memfile) begin
$display("Preloading %m from %s", memfile);
$readmemh(memfile, mem);
end

// The last 4 bytes are the `x0` (zero) register. Zero them out
// to avoid starting the simulation with `x0` undefined.
mem[depth-4] = 8'h0;
mem[depth-3] = 8'h0;
mem[depth-2] = 8'h0;
mem[depth-1] = 8'h0;
end
endmodule