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Added ENABLE_COUNTERS64 config parameter

This commit is contained in:
Clifford Wolf 2016-04-12 18:04:16 +02:00
parent 2fdafb9c16
commit e9c7ea6b5d
2 changed files with 19 additions and 6 deletions
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6
README.md
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@ -141,6 +141,12 @@ instructions are not optional for an RV32I core. But chances are they are not
going to be missed after the application code has been debugged and profiled.
This instructions are optional for an RV32E core.*
#### ENABLE_COUNTERS64 (default = 1)
This parameter enables support for the `RDCYCLEH`, `RDTIMEH`, and `RDINSTRETH`
instructions. If this parameter is set to 0, and `ENABLE_COUNTERS` is set to 1,
then only the `RDCYCLE`, `RDTIME`, and `RDINSTRET` instructions are available.
#### ENABLE_REGS_16_31 (default = 1)
This parameter enables support for registers the `x16`..`x31`. The RV32E ISA

19
picorv32.v
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@ -39,6 +39,7 @@
module picorv32 #(
parameter [ 0:0] ENABLE_COUNTERS = 1,
parameter [ 0:0] ENABLE_COUNTERS64 = 1,
parameter [ 0:0] ENABLE_REGS_16_31 = 1,
parameter [ 0:0] ENABLE_REGS_DUALPORT = 1,
parameter [ 0:0] LATCHED_MEM_RDATA = 0,
@ -786,9 +787,9 @@ module picorv32 #(
instr_rdcycle <= ((mem_rdata_q[6:0] == 7'b1110011 && mem_rdata_q[31:12] == 'b11000000000000000010) ||
(mem_rdata_q[6:0] == 7'b1110011 && mem_rdata_q[31:12] == 'b11000000000100000010)) && ENABLE_COUNTERS;
instr_rdcycleh <= ((mem_rdata_q[6:0] == 7'b1110011 && mem_rdata_q[31:12] == 'b11001000000000000010) ||
(mem_rdata_q[6:0] == 7'b1110011 && mem_rdata_q[31:12] == 'b11001000000100000010)) && ENABLE_COUNTERS;
(mem_rdata_q[6:0] == 7'b1110011 && mem_rdata_q[31:12] == 'b11001000000100000010)) && ENABLE_COUNTERS && ENABLE_COUNTERS64;
instr_rdinstr <= (mem_rdata_q[6:0] == 7'b1110011 && mem_rdata_q[31:12] == 'b11000000001000000010) && ENABLE_COUNTERS;
instr_rdinstrh <= (mem_rdata_q[6:0] == 7'b1110011 && mem_rdata_q[31:12] == 'b11001000001000000010) && ENABLE_COUNTERS;
instr_rdinstrh <= (mem_rdata_q[6:0] == 7'b1110011 && mem_rdata_q[31:12] == 'b11001000001000000010) && ENABLE_COUNTERS && ENABLE_COUNTERS64;
instr_getq <= mem_rdata_q[6:0] == 7'b0001011 && mem_rdata_q[31:25] == 7'b0000000 && ENABLE_IRQ && ENABLE_IRQ_QREGS;
instr_setq <= mem_rdata_q[6:0] == 7'b0001011 && mem_rdata_q[31:25] == 7'b0000001 && ENABLE_IRQ && ENABLE_IRQ_QREGS;
@ -985,8 +986,10 @@ module picorv32 #(
pcpi_timeout <= !pcpi_timeout_counter;
end
if (ENABLE_COUNTERS)
if (ENABLE_COUNTERS) begin
count_cycle <= resetn ? count_cycle + 1 : 0;
if (!ENABLE_COUNTERS64) count_cycle[63:32] <= 0;
end
next_irq_pending = ENABLE_IRQ ? irq_pending & LATCHED_IRQ : 'bx;
@ -1096,8 +1099,10 @@ module picorv32 #(
if (decoder_trigger) begin
`debug($display("-- %-0t", $time);)
reg_next_pc <= current_pc + (compressed_instr ? 2 : 4);
if (ENABLE_COUNTERS)
if (ENABLE_COUNTERS) begin
count_instr <= count_instr + 1;
if (!ENABLE_COUNTERS64) count_instr[63:32] <= 0;
end
if (instr_jal) begin
mem_do_rinst <= 1;
reg_next_pc <= current_pc + decoded_imm_uj;
@ -1157,11 +1162,11 @@ module picorv32 #(
case (1'b1)
instr_rdcycle:
reg_out <= count_cycle[31:0];
instr_rdcycleh:
instr_rdcycleh && ENABLE_COUNTERS64:
reg_out <= count_cycle[63:32];
instr_rdinstr:
reg_out <= count_instr[31:0];
instr_rdinstrh:
instr_rdinstrh && ENABLE_COUNTERS64:
reg_out <= count_instr[63:32];
endcase
latched_store <= 1;
@ -1711,6 +1716,7 @@ endmodule
module picorv32_axi #(
parameter [ 0:0] ENABLE_COUNTERS = 1,
parameter [ 0:0] ENABLE_COUNTERS64 = 1,
parameter [ 0:0] ENABLE_REGS_16_31 = 1,
parameter [ 0:0] ENABLE_REGS_DUALPORT = 1,
parameter [ 0:0] TWO_STAGE_SHIFT = 1,
@ -1811,6 +1817,7 @@ module picorv32_axi #(
picorv32 #(
.ENABLE_COUNTERS (ENABLE_COUNTERS ),
.ENABLE_COUNTERS64 (ENABLE_COUNTERS64 ),
.ENABLE_REGS_16_31 (ENABLE_REGS_16_31 ),
.ENABLE_REGS_DUALPORT(ENABLE_REGS_DUALPORT),
.TWO_STAGE_SHIFT (TWO_STAGE_SHIFT ),