Remove old MCYCLE/MCYCLEH, implement MCOUNTINHIBIT fully, always decode tied-off HPM counters
This commit is contained in:
Luke Wren
parent
565b76672a
commit
cec5dc4e3b
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@ -121,7 +121,6 @@ localparam PMPADDR1 = 12'h3b1; // Physical memory protection address regis
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// Performance counters (RW)
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localparam MCYCLE = 12'hb00; // Raw cycles since start of day
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localparam MTIME = 12'hb01; // "Wall clock", can be aliased to MCYCLE
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localparam MINSTRET = 12'hb02; // Instruction retire count since start of day
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localparam MHPMCOUNTER3 = 12'hb03; // WARL (we tie to 0)
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localparam MHPMCOUNTER4 = 12'hb04; // WARL (we tie to 0)
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@ -154,7 +153,6 @@ localparam MHPMCOUNTER30 = 12'hb1e; // WARL (we tie to 0)
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localparam MHPMCOUNTER31 = 12'hb1f; // WARL (we tie to 0)
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localparam MCYCLEH = 12'hb80; // High halves of each counter
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localparam MTIMEH = 12'hb81;
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localparam MINSTRETH = 12'hb82;
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localparam MHPMCOUNTER3H = 12'hb83;
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localparam MHPMCOUNTER4H = 12'hb84;
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@ -186,7 +184,7 @@ localparam MHPMCOUNTER29H = 12'hb9d;
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localparam MHPMCOUNTER30H = 12'hb9e;
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localparam MHPMCOUNTER31H = 12'hb9f;
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localparam MCOUNTINHIBIT = 12'h302; // WARL (we must tie 0 as CYCLE and TIME are aliased)
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localparam MCOUNTINHIBIT = 12'h302; // Count inhibit register for mcycle/minstret
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localparam MHPMEVENT3 = 12'h323; // WARL (we tie to 0)
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localparam MHPMEVENT4 = 12'h324; // WARL (we tie to 0)
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localparam MHPMEVENT5 = 12'h325; // WARL (we tie to 0)
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@ -217,14 +215,6 @@ localparam MHPMEVENT29 = 12'h33d; // WARL (we tie to 0)
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localparam MHPMEVENT30 = 12'h33e; // WARL (we tie to 0)
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localparam MHPMEVENT31 = 12'h33f; // WARL (we tie to 0)
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// TODO
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// Decoding all these damn HPMs bloats the logic. If we don't decode them, we
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// can still trap the illegal opcode and emulate them. This is ugly and
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// contravenes the standard, but why on earth would they mandate 100 useless
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// registers with no defined operation?
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// If you really want them, set this to 1:
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localparam DECODE_HPM = 0;
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// ----------------------------------------------------------------------------
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// CSR state + update logic
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// ----------------------------------------------------------------------------
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@ -361,7 +351,10 @@ end
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// ----------------------------------------------------------------------------
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// Counters
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// MCYCLE and MTIME are aliased (fine as long as MCOUNTINHIBIT[0] is tied low)
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reg mcountinhibit_cy;
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reg mcountinhibit_ir;
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reg [XLEN-1:0] mcycleh;
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reg [XLEN-1:0] mcycle;
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reg [XLEN-1:0] minstreth;
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@ -380,11 +373,16 @@ always @ (posedge clk or negedge rst_n) begin
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mcycle <= X0;
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minstreth <= X0;
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minstret <= X0;
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// Counters inhibited by default to save energy
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mcountinhibit_cy <= 1'b0;
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mcountinhibit_ir <= 1'b0;
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end else if (CSR_COUNTER) begin
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// Hold the top (2 * XLEN - W_COUNTER) bits constant to save gates:
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{mcycleh, mcycle} <= (({mcycleh, mcycle} + 1'b1) & ~({2*XLEN{1'b1}} << W_COUNTER))
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| ({mcycleh, mcycle} & ({2*XLEN{1'b1}} << W_COUNTER));
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if (instr_ret)
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// Optionally hold the top (2 * XLEN - W_COUNTER) bits constant to
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// save gates (noncompliant if enabled)
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if (!mcountinhibit_cy)
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{mcycleh, mcycle} <= (({mcycleh, mcycle} + 1'b1) & ~({2*XLEN{1'b1}} << W_COUNTER))
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| ({mcycleh, mcycle} & ({2*XLEN{1'b1}} << W_COUNTER));
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if (!mcountinhibit_ir && instr_ret)
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{minstreth, minstret} <= (({minstreth, minstret} + 1'b1) & ~({2*XLEN{1'b1}} << W_COUNTER))
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| ({minstreth, minstret} & ({2*XLEN{1'b1}} << W_COUNTER));
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if (wen) begin
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@ -396,6 +394,12 @@ always @ (posedge clk or negedge rst_n) begin
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minstreth <= ctr_update;
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if (addr == MINSTRET)
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minstret <= ctr_update;
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if (addr == MCOUNTINHIBIT) begin
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{mcountinhibit_ir, mcountinhibit_cy} <=
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wtype == CSR_WTYPE_C ? {mcountinhibit_ir, mcountinhibit_cy} & ~{wdata[2], wdata[0]} :
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wtype == CSR_WTYPE_S ? {mcountinhibit_ir, mcountinhibit_cy} | {wdata[2], wdata[0]} :
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{wdata[2], wdata[0]} ;
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end
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end
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end
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end
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@ -528,107 +532,110 @@ always @ (*) begin
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// Counter CSRs
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// Get the tied WARLs out the way first
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MHPMCOUNTER3: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER4: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER5: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER6: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER7: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER8: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER9: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER10: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER11: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER12: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER13: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER14: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER15: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER16: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER17: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER18: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER19: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER20: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER21: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER22: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER23: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER24: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER25: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER26: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER27: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER28: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER29: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER30: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER31: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER3: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER4: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER5: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER6: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER7: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER8: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER9: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER10: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER11: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER12: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER13: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER14: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER15: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER16: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER17: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER18: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER19: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER20: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER21: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER22: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER23: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER24: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER25: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER26: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER27: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER28: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER29: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER30: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER31: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER3H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER4H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER5H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER6H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER7H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER8H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER9H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER10H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER11H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER12H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER13H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER14H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER15H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER16H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER17H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER18H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER19H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER20H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER21H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER22H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER23H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER24H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER25H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER26H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER27H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER28H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER29H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER30H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER31H: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER3H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER4H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER5H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER6H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER7H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER8H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER9H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER10H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER11H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER12H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER13H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER14H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER15H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER16H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER17H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER18H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER19H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER20H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER21H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER22H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER23H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER24H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER25H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER26H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER27H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER28H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER29H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER30H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMCOUNTER31H: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT3: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT4: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT5: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT6: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT7: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT8: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT9: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT10: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT11: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT12: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT13: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT14: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT15: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT16: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT17: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT18: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT19: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT20: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT21: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT22: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT23: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT24: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT25: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT26: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT27: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT28: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT29: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT30: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT31: if (DECODE_HPM && CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT3: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT4: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT5: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT6: if (CSR_COUNTER) begin decode_match = 1'b1; end
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MHPMEVENT7: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT8: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT9: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT10: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT11: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT12: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT13: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT14: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT15: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT16: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT17: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT18: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT19: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT20: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT21: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT22: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT23: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT24: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT25: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT26: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT27: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT28: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT29: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT30: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
MHPMEVENT31: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
|
||||
MCOUNTINHIBIT: if (CSR_COUNTER) begin decode_match = 1'b1; end
|
||||
// Phew...
|
||||
MCOUNTINHIBIT: if (CSR_COUNTER) begin
|
||||
decode_match = 1'b1;
|
||||
rdata = {
|
||||
29'd0,
|
||||
mcountinhibit_ir,
|
||||
1'b0,
|
||||
mcountinhibit_cy
|
||||
};
|
||||
end
|
||||
|
||||
MCYCLE: if (CSR_COUNTER) begin
|
||||
decode_match = 1'b1;
|
||||
rdata = mcycle;
|
||||
end
|
||||
MTIME: if (CSR_COUNTER) begin
|
||||
decode_match = 1'b1;
|
||||
rdata = mcycle; // Can be aliased as long as we tie MCOUNTINHIBIT[0] to 0
|
||||
end
|
||||
MINSTRET: if (CSR_COUNTER) begin
|
||||
decode_match = 1'b1;
|
||||
rdata = minstret;
|
||||
|
|
@ -638,10 +645,6 @@ always @ (*) begin
|
|||
decode_match = 1'b1;
|
||||
rdata = mcycleh;
|
||||
end
|
||||
MTIMEH: if (CSR_COUNTER) begin
|
||||
decode_match = 1'b1;
|
||||
rdata = mcycleh; // Can be aliased as long as we tie MCOUNTINHIBIT[0] to 0
|
||||
end
|
||||
MINSTRETH: if (CSR_COUNTER) begin
|
||||
decode_match = 1'b1;
|
||||
rdata = minstreth;
|
||||
|
|
|
|||
Loading…
Reference in New Issue