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Remove IRQ sync regs as they are not needed for openpiton

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Michael Schaffner 2019-05-27 16:42:52 +02:00 • committed by Florian Zaruba
parent 47fe4d35e4
commit 45762c7c67
1 changed files with 1 additions and 27 deletions
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28
openpiton/riscv_peripherals.sv
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@ -745,32 +745,6 @@ module riscv_peripherals #(
assign reg_bus.error = plic_resp.error;
assign reg_bus.ready = plic_resp.ready;
// synchronization regs
logic [2:0][NumSources-1:0] irq_sources_d, irq_sources_q;
assign irq_sources_d = {irq_sources_q[$high(irq_sources_q)-1:0], irq_sources_i};
always_ff @(posedge clk_i or negedge rst_ni) begin : p_synch
if(!rst_ni) begin
irq_sources_q <= '0;
end else begin
irq_sources_q <= irq_sources_d;
end
end
// reshape pulse if needed
logic [NumSources-1:0] irq_sources_sync;
always_comb begin : p_wedge
for (int k=0; k<NumSources; k++) begin
if (irq_le_i[k]) begin
// edge
irq_sources_sync[k] = irq_sources_q[$high(irq_sources_q)-1][k] & ~irq_sources_q[$high(irq_sources_q)][k];
end else begin
// level
irq_sources_sync[k] = irq_sources_q[$high(irq_sources_q)][k];
end
end
end
plic_top #(
.N_SOURCE ( NumSources ),
.N_TARGET ( 2*NumHarts ),
@ -781,7 +755,7 @@ module riscv_peripherals #(
.req_i ( plic_req ),
.resp_o ( plic_resp ),
.le_i ( irq_le_i ), // 0:level 1:edge
.irq_sources_i ( irq_sources_sync ),
.irq_sources_i, // already synchronized
.eip_targets_o ( irq_o )
);