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Interrupts working. Adding philosophers example

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Olof Kindgren
2018-11-26 23:03:40 +01:00
parent e1a883acc2
commit cd983190b3
6 changed files with 4129 additions and 20 deletions
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26
rtl/serv_decode.v
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@@ -4,6 +4,7 @@ module serv_decode
input wire clk,
input wire i_rst,
input wire i_mtip,
input wire i_timer_irq_en,
input wire [31:0] i_wb_rdt,
input wire i_wb_en,
input wire i_rf_ready,
@@ -289,15 +290,11 @@ module serv_decode
assign o_ctrl_trap = (state == TRAP);
always @(posedge clk) begin
if (i_mtip)
o_csr_mcause[3:0] <= 4'd7;
else begin
o_csr_mcause[3:0] <= 4'd0;
if (i_mem_misalign)
o_csr_mcause[3:0] <= {2'b01, o_mem_cmd, 1'b0};
if (e_op)
o_csr_mcause <= {!op[20],3'b011};
end
o_csr_mcause[3:0] <= 4'd0;
if (i_mem_misalign)
o_csr_mcause[3:0] <= {2'b01, o_mem_cmd, 1'b0};
if (e_op)
o_csr_mcause <= {!op[20],3'b011};
end
wire two_stage_op =
@@ -305,7 +302,15 @@ module serv_decode
shift_op;
reg stage_one_done;
reg mtip_r;
reg pending_irq;
always @(posedge clk) begin
mtip_r <= i_mtip;
if (i_mtip & !mtip_r & i_timer_irq_en)
pending_irq <= 1'b1;
cnt_done <= cnt == 30;
case (state)
@@ -314,7 +319,7 @@ module serv_decode
state <= RUN;
if (two_stage_op & !stage_one_done)
state <= INIT;
if (e_op | i_mtip)
if (e_op | pending_irq)
state <= TRAP;
end
end
@@ -331,6 +336,7 @@ module serv_decode
state <= IDLE;
end
TRAP : begin
pending_irq <= 1'b0;
if (cnt_done)
state <= IDLE;
end