122 lines
5.6 KiB
Verilog
122 lines
5.6 KiB
Verilog
/*
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Copyright 2019 Blue Liang, liangkangnan@163.com
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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`define CPU_RESET_ADDR 32'h0 // CPU复位地址
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`define CPU_CLOCK_HZ 50000000 // CPU时钟(50MHZ)
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`define INST_MEM_START_ADDR 32'h0 // 指令存储器起始地址
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`define INST_MEM_END_ADDR 32'h0fffffff // 指令存储器结束地址
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`define ROM_DEPTH 8192 // 指令存储器深度，单位为word(4字节)
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`define RAM_DEPTH 4096 // 数据存储器深度，单位为word(4字节)
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`define INT_WIDTH 8
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`define INT_NONE 8'h0
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`define STALL_WIDTH 4
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`define STALL_PC 2'd0
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`define STALL_IF 2'd1
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`define STALL_ID 2'd2
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`define STALL_EX 2'd3
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`define INST_NOP 32'h00000013
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`define INST_MRET 32'h30200073
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`define INST_ECALL 32'h00000073
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`define INST_EBREAK 32'h00100073
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// 指令译码信息
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`define DECINFO_GRP_BUS 2:0
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`define DECINFO_GRP_WIDTH 3
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`define DECINFO_GRP_ALU `DECINFO_GRP_WIDTH'd1
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`define DECINFO_GRP_BJP `DECINFO_GRP_WIDTH'd2
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`define DECINFO_GRP_MULDIV `DECINFO_GRP_WIDTH'd3
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`define DECINFO_GRP_CSR `DECINFO_GRP_WIDTH'd4
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`define DECINFO_GRP_MEM `DECINFO_GRP_WIDTH'd5
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`define DECINFO_GRP_SYS `DECINFO_GRP_WIDTH'd6
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`define DECINFO_ALU_BUS_WIDTH (`DECINFO_GRP_WIDTH+14)
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`define DECINFO_ALU_LUI (`DECINFO_GRP_WIDTH+0)
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`define DECINFO_ALU_AUIPC (`DECINFO_GRP_WIDTH+1)
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`define DECINFO_ALU_ADD (`DECINFO_GRP_WIDTH+2)
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`define DECINFO_ALU_SUB (`DECINFO_GRP_WIDTH+3)
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`define DECINFO_ALU_SLL (`DECINFO_GRP_WIDTH+4)
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`define DECINFO_ALU_SLT (`DECINFO_GRP_WIDTH+5)
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`define DECINFO_ALU_SLTU (`DECINFO_GRP_WIDTH+6)
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`define DECINFO_ALU_XOR (`DECINFO_GRP_WIDTH+7)
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`define DECINFO_ALU_SRL (`DECINFO_GRP_WIDTH+8)
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`define DECINFO_ALU_SRA (`DECINFO_GRP_WIDTH+9)
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`define DECINFO_ALU_OR (`DECINFO_GRP_WIDTH+10)
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`define DECINFO_ALU_AND (`DECINFO_GRP_WIDTH+11)
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`define DECINFO_ALU_OP2IMM (`DECINFO_GRP_WIDTH+12)
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`define DECINFO_ALU_OP1PC (`DECINFO_GRP_WIDTH+13)
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`define DECINFO_BJP_BUS_WIDTH (`DECINFO_GRP_WIDTH+8)
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`define DECINFO_BJP_JUMP (`DECINFO_GRP_WIDTH+0)
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`define DECINFO_BJP_BEQ (`DECINFO_GRP_WIDTH+1)
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`define DECINFO_BJP_BNE (`DECINFO_GRP_WIDTH+2)
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`define DECINFO_BJP_BLT (`DECINFO_GRP_WIDTH+3)
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`define DECINFO_BJP_BGE (`DECINFO_GRP_WIDTH+4)
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`define DECINFO_BJP_BLTU (`DECINFO_GRP_WIDTH+5)
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`define DECINFO_BJP_BGEU (`DECINFO_GRP_WIDTH+6)
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`define DECINFO_BJP_OP1RS1 (`DECINFO_GRP_WIDTH+7)
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`define DECINFO_MULDIV_BUS_WIDTH (`DECINFO_GRP_WIDTH+8)
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`define DECINFO_MULDIV_MUL (`DECINFO_GRP_WIDTH+0)
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`define DECINFO_MULDIV_MULH (`DECINFO_GRP_WIDTH+1)
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`define DECINFO_MULDIV_MULHSU (`DECINFO_GRP_WIDTH+2)
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`define DECINFO_MULDIV_MULHU (`DECINFO_GRP_WIDTH+3)
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`define DECINFO_MULDIV_DIV (`DECINFO_GRP_WIDTH+4)
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`define DECINFO_MULDIV_DIVU (`DECINFO_GRP_WIDTH+5)
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`define DECINFO_MULDIV_REM (`DECINFO_GRP_WIDTH+6)
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`define DECINFO_MULDIV_REMU (`DECINFO_GRP_WIDTH+7)
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`define DECINFO_CSR_BUS_WIDTH (`DECINFO_GRP_WIDTH+16)
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`define DECINFO_CSR_CSRRW (`DECINFO_GRP_WIDTH+0)
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`define DECINFO_CSR_CSRRS (`DECINFO_GRP_WIDTH+1)
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`define DECINFO_CSR_CSRRC (`DECINFO_GRP_WIDTH+2)
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`define DECINFO_CSR_RS1IMM (`DECINFO_GRP_WIDTH+3)
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`define DECINFO_CSR_CSRADDR `DECINFO_GRP_WIDTH+4+12-1:`DECINFO_GRP_WIDTH+4
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`define DECINFO_MEM_BUS_WIDTH (`DECINFO_GRP_WIDTH+8)
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`define DECINFO_MEM_LB (`DECINFO_GRP_WIDTH+0)
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`define DECINFO_MEM_LH (`DECINFO_GRP_WIDTH+1)
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`define DECINFO_MEM_LW (`DECINFO_GRP_WIDTH+2)
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`define DECINFO_MEM_LBU (`DECINFO_GRP_WIDTH+3)
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`define DECINFO_MEM_LHU (`DECINFO_GRP_WIDTH+4)
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`define DECINFO_MEM_SB (`DECINFO_GRP_WIDTH+5)
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`define DECINFO_MEM_SH (`DECINFO_GRP_WIDTH+6)
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`define DECINFO_MEM_SW (`DECINFO_GRP_WIDTH+7)
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`define DECINFO_SYS_BUS_WIDTH (`DECINFO_GRP_WIDTH+5)
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`define DECINFO_SYS_ECALL (`DECINFO_GRP_WIDTH+0)
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`define DECINFO_SYS_EBREAK (`DECINFO_GRP_WIDTH+1)
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`define DECINFO_SYS_NOP (`DECINFO_GRP_WIDTH+2)
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`define DECINFO_SYS_MRET (`DECINFO_GRP_WIDTH+3)
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`define DECINFO_SYS_FENCE (`DECINFO_GRP_WIDTH+4)
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// 最长的那组
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`define DECINFO_WIDTH `DECINFO_CSR_BUS_WIDTH
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// CSR寄存器地址
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`define CSR_CYCLE 12'hc00
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`define CSR_CYCLEH 12'hc80
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`define CSR_MTVEC 12'h305
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`define CSR_MCAUSE 12'h342
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`define CSR_MEPC 12'h341
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`define CSR_MIE 12'h304
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`define CSR_MSTATUS 12'h300
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`define CSR_MSCRATCH 12'h340
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