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https://opencores.org/ocsvn/srdydrdy_lib/srdydrdy_lib/trunk
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| Rev 12 |
Rev 13 |
| Line 37... |
Line 37... |
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localparam s_idle = 0,
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localparam s_idle = 0,
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s_rfwd = 1,
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s_rfwd = 1,
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s_rcopy = 2,
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s_rcopy = 2,
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s_rsink = 3,
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s_rsink = 3,
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s_tdata = 4;
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s_tdata = 4,
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s_tdrop = 5;
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localparam ns_idle = 1,
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localparam ns_idle = 1,
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ns_rfwd = 2,
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ns_rfwd = 2,
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ns_rcopy = 4,
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ns_rcopy = 4,
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ns_rsink = 8,
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ns_rsink = 8,
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ns_tdata = 16;
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ns_tdata = 16,
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ns_tdrop = 32;
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assign rarb_req = lfli_srdy & lprx_srdy | state[s_tdata];
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assign rarb_req = lfli_srdy & lprx_srdy | state[s_tdata];
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always @*
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always @*
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begin
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begin
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| Line 75... |
Line 77... |
lro_srdy = 1;
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lro_srdy = 1;
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nxt_state = ns_tdata;
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nxt_state = ns_tdata;
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end
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end
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end
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end
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else
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else
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begin
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lfli_drdy = 1;
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lfli_drdy = 1;
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nxt_state = ns_tdrop;
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end
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end
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end
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else if (lri_srdy)
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else if (lri_srdy)
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begin
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begin
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if (lri_data[`PRW_DATA] & port_mask)
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if (lri_data[`PRW_DATA] & port_mask)
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begin
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begin
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| Line 129... |
Line 134... |
(lprx_data[`PRW_PCC] == `PCC_BADEOP))
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(lprx_data[`PRW_PCC] == `PCC_BADEOP))
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nxt_state = ns_idle;
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nxt_state = ns_idle;
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end
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end
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end // case: state[s_tdata]
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end // case: state[s_tdata]
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// received lookup from FIB with zero port index; drop
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// the packet by reading out
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state[s_tdrop] :
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begin
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lprx_drdy = 1;
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if (lprx_srdy)
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begin
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if ((lprx_data[`PRW_PCC] == `PCC_EOP) |
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(lprx_data[`PRW_PCC] == `PCC_BADEOP))
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nxt_state = ns_idle;
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end
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end
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// data on ring is for our port as well as further ports
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// data on ring is for our port as well as further ports
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// copy ring data to our TX buffer as well as on the ring
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// copy ring data to our TX buffer as well as on the ring
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state[s_rcopy] :
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state[s_rcopy] :
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begin
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begin
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lro_data = lri_data;
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lro_data = lri_data;
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