diff options
Diffstat (limited to 'rv64cpu/rtl')
| -rw-r--r-- | rv64cpu/rtl/core/include/csr_pkg.sv | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/rv64cpu/rtl/core/include/csr_pkg.sv b/rv64cpu/rtl/core/include/csr_pkg.sv new file mode 100644 index 0000000..53165c9 --- /dev/null +++ b/rv64cpu/rtl/core/include/csr_pkg.sv @@ -0,0 +1,110 @@ +// Richard CPU +// Copyright (C) 2026 Richard Qin + +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. + +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License +// along with this program. If not, see <https://www.gnu.org/licenses/>. + +// File path: rtl/core/include/csr_pkg.sv +// Description: Global enumerations, address definitions, and exception reason constants related to CSR and privilege-level architecture + +package csr_pkg; + import rv64_pkg::*; + + typedef enum logic [2:0] { + CSR_OP_NONE = 3'b000, + CSR_OP_WRITE = 3'b001, + CSR_OP_SET = 3'b010, + CSR_OP_CLEAR = 3'b011 + } csr_op_t; + + // --------------------------------- + // Machine Mode CSRs (M-Mode) + // --------------------------------- + localparam logic [11:0] CSR_MVENDORID = 12'hF11; // Vendor ID + localparam logic [11:0] CSR_MARCHID = 12'hF12; // Architecture ID + localparam logic [11:0] CSR_MIMPID = 12'hF13; // Implementation ID + localparam logic [11:0] CSR_MHARTID = 12'hF14; // Hart ID + + localparam logic [11:0] CSR_MSTATUS = 12'h300; // Machine Status Register + localparam logic [11:0] CSR_MISA = 12'h301; // Machine ISA Register + localparam logic [11:0] CSR_MEDELEG = 12'h302; // Exception Delegation + localparam logic [11:0] CSR_MIDELEG = 12'h303; // Interrupt Delegation + localparam logic [11:0] CSR_MIE = 12'h304; // Machine Interrupt Enable Register + localparam logic [11:0] CSR_MTVEC = 12'h305; // Machine Trap Vector Register + localparam logic [11:0] CSR_MCOUNTEREN= 12'h306; // Machine Counter Enable Register + + localparam logic [11:0] CSR_MSCRATCH = 12'h340; // Machine Scratch Register + localparam logic [11:0] CSR_MEPC = 12'h341; // Machine Exception Program Counter + localparam logic [11:0] CSR_MCAUSE = 12'h342; // Machine Cause Register + localparam logic [11:0] CSR_MTVAL = 12'h343; // Machine Trap Value Register + localparam logic [11:0] CSR_MIP = 12'h344; // Machine Interrupt Pending Register + + localparam logic [11:0] CSR_MCYCLE = 12'hB00; // Machine Cycle Counter + localparam logic [11:0] CSR_MINSTRET = 12'hB02; // Machine Instruction Retired Counter + + // --------------------------------- + // Supervisor Mode CSRs (S-Mode) + // --------------------------------- + localparam logic [11:0] CSR_SSTATUS = 12'h100; // Supervisor Status Register + localparam logic [11:0] CSR_SIE = 12'h104; // Supervisor Interrupt Enable Register + localparam logic [11:0] CSR_STVEC = 12'h105; // Supervisor Trap Vector Register + localparam logic [11:0] CSR_SCOUNTEREN= 12'h106; // Supervisor Counter Enable Register + localparam logic [11:0] CSR_SSCRATCH = 12'h140; // Supervisor Scratch Register + localparam logic [11:0] CSR_SEPC = 12'h141; // Supervisor Exception Program Counter + localparam logic [11:0] CSR_SCAUSE = 12'h142; // Supervisor Cause Register + localparam logic [11:0] CSR_STVAL = 12'h143; // Supervisor Trap Value Register + localparam logic [11:0] CSR_SIP = 12'h144; // Supervisor Interrupt Pending Register + localparam logic [11:0] CSR_SATP = 12'h180; // Supervisor Address Translation and Protection Register + + // --------------------------------- + // User Mode CSRs (U-Mode / URW) + // --------------------------------- + localparam logic [11:0] CSR_CYCLE = 12'hC00; // Cycle Counter + localparam logic [11:0] CSR_TIME = 12'hC01; // Timer Counter + localparam logic [11:0] CSR_INSTRET = 12'hC02; // Instruction Retired Counter + + // --------------------------------- + // Exception Cause Codes (mcause.Interrupt == 0) + // --------------------------------- + localparam logic [XLEN-1:0] EXC_INST_ADDR_MISALIGNED = 64'd0; // Instruction Address Misaligned + localparam logic [XLEN-1:0] EXC_INST_FAULT = 64'd1; // Instruction Access Fault + localparam logic [XLEN-1:0] EXC_INST_ILLEGAL = 64'd2; // Illegal Instruction + localparam logic [XLEN-1:0] EXC_BREAKPOINT = 64'd3; // Breakpoint + localparam logic [XLEN-1:0] EXC_LOAD_ADDR_MISALIGNED = 64'd4; // Load Address Misaligned + localparam logic [XLEN-1:0] EXC_LOAD_FAULT = 64'd5; // Load Access Fault + localparam logic [XLEN-1:0] EXC_STORE_ADDR_MISALIGNED = 64'd6; // Store Address Misaligned + localparam logic [XLEN-1:0] EXC_STORE_FAULT = 64'd7; // Store Access Fault + localparam logic [XLEN-1:0] EXC_ECALL_FROM_U = 64'd8; // Environment Call from U-Mode + localparam logic [XLEN-1:0] EXC_ECALL_FROM_S = 64'd9; // Environment Call from S-Mode + localparam logic [XLEN-1:0] EXC_ECALL_FROM_M = 64'd11; // Environment Call from M-Mode + localparam logic [XLEN-1:0] EXC_INSTR_PAGE_FAULT = 64'd12; // Instruction Page Fault + localparam logic [XLEN-1:0] EXC_LOAD_PAGE_FAULT = 64'd13; // Load Page Fault + localparam logic [XLEN-1:0] EXC_STORE_PAGE_FAULT = 64'd15; // Store Page Fault + + // --------------------------------- + // Interrupt Cause Codes (mcause.Interrupt == 1) + // --------------------------------- + // User Mode Interrupts + localparam logic [XLEN-1:0] INT_U_SOFTWARE = 64'd0; // User Mode Software Interrupt + localparam logic [XLEN-1:0] INT_U_TIMER = 64'd4; // User Mode Timer Interrupt + localparam logic [XLEN-1:0] INT_U_EXTERNAL = 64'd8; // User Mode External Interrupt + // Supervisor Mode Interrupts + localparam logic [XLEN-1:0] INT_S_SOFTWARE = 64'd1; // Supervisor Mode Software Interrupt + localparam logic [XLEN-1:0] INT_S_TIMER = 64'd5; // Supervisor Mode Timer Interrupt + localparam logic [XLEN-1:0] INT_S_EXTERNAL = 64'd9; // Supervisor Mode External Interrupt + // Machine Mode Interrupts + localparam logic [XLEN-1:0] INT_M_SOFTWARE = 64'd3; // Machine Mode Software Interrupt + localparam logic [XLEN-1:0] INT_M_TIMER = 64'd7; // Machine Mode Timer Interrupt + localparam logic [XLEN-1:0] INT_M_EXTERNAL = 64'd11; // Machine Mode External Interrupt + +endpackage |