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Doh typo

This commit is contained in:
Luke Wren 2021-08-20 23:02:31 +01:00
parent b99e5b8a67
commit 9dd091b7b5
1 changed files with 4 additions and 4 deletions
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8
hdl/peri/hazard3_riscv_timer.v
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@ -121,7 +121,7 @@ end
reg [63:0] mtimecmp;
reg mtimecmp_borrow;
wire mtimecmp_borrow_next = (!mtimecmp[0] && (mtime[0] || mtimecmp_borrow)) || (mtime[0] && mtimecmp_borrow);
wire mtimecmp_borrow_next = (!mtime[0] && (mtimecmp[0] || mtimecmp_borrow)) || (mtimecmp[0] && mtimecmp_borrow);
always @ (posedge clk or negedge rst_n) begin
if (!rst_n) begin
@ -129,8 +129,8 @@ always @ (posedge clk or negedge rst_n) begin
mtimecmp_borrow <= 1'b0;
timer_irq <= 1'b0;
end else begin
// Serially subtract mtime from mtimecmp. If there is no borrow from
// bit 63 (i.e. if mtimecmp was greater or equal) then assert IRQ.
// Serially subtract mtimecmp from mtime. If there is no borrow from
// bit 63 (i.e. if mtime was greater or equal) then assert IRQ.
if (tick) begin
mtimecmp_borrow <= mtimecmp_borrow_next;
mtimecmp <= {mtimecmp[0], mtimecmp[63:1]};
@ -150,7 +150,7 @@ always @ (*) begin
ADDR_MTIME: begin prdata = mtime[31:0]; pready = serial_ctr == 6'h00; end
ADDR_MTIMEH: begin prdata = mtime[31:0]; pready = serial_ctr == 6'h20; end
ADDR_MTIMECMP: begin prdata = mtimecmp[31:0]; pready = serial_ctr == 6'h00; end
ADDR_MTIMECMPH: begin prdata = mtimecmp[63:32]; pready = serial_ctr == 6'h20; end
ADDR_MTIMECMPH: begin prdata = mtimecmp[31:0]; pready = serial_ctr == 6'h20; end
default: begin prdata = {W_DATA{1'b0}}; pready = 1'b1; end
endcase
end