1/*************************************************************************************** 2* Copyright (c) 2020-2021 Institute of Computing Technology, Chinese Academy of Sciences 3* Copyright (c) 2020-2021 Peng Cheng Laboratory 4* 5* XiangShan is licensed under Mulan PSL v2. 6* You can use this software according to the terms and conditions of the Mulan PSL v2. 7* You may obtain a copy of Mulan PSL v2 at: 8* http://license.coscl.org.cn/MulanPSL2 9* 10* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, 11* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, 12* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE. 13* 14* See the Mulan PSL v2 for more details. 15***************************************************************************************/ 16 17package xiangshan.backend.fu.util 18 19import chisel3._ 20import chisel3.util._ 21import utils._ 22import xiangshan._ 23import xiangshan.backend._ 24import utils.XSDebug 25 26trait HasCSRConst { 27 28 // User Trap Setup 29 val Ustatus = 0x000 30 val Uie = 0x004 31 val Utvec = 0x005 32 33 // User Trap Handling 34 val Uscratch = 0x040 35 val Uepc = 0x041 36 val Ucause = 0x042 37 val Utval = 0x043 38 val Uip = 0x044 39 40 // User Floating-Point CSRs (not implemented) 41 val Fflags = 0x001 42 val Frm = 0x002 43 val Fcsr = 0x003 44 45 // User Counter/Timers 46 val Cycle = 0xC00 47 val Time = 0xC01 48 val Instret = 0xC02 49 50 // Supervisor Trap Setup 51 val Sstatus = 0x100 52 val Sedeleg = 0x102 53 val Sideleg = 0x103 54 val Sie = 0x104 55 val Stvec = 0x105 56 val Scounteren = 0x106 57 58 // Supervisor Trap Handling 59 val Sscratch = 0x140 60 val Sepc = 0x141 61 val Scause = 0x142 62 val Stval = 0x143 63 val Sip = 0x144 64 65 // Supervisor Protection and Translation 66 val Satp = 0x180 67 68 // Supervisor Custom Read/Write 69 val Sbpctl = 0x5C0 70 val Spfctl = 0x5C1 71 val Slvpredctl = 0x5C2 72 val Smblockctl = 0x5C3 73 val Srnctl = 0x5C4 74 val Scachebase = 0x5C5 75 /** 0x5C5-0x5E5 for cache instruction register*/ 76 77 val Sdsid = 0x9C0 78 79 // Machine Information Registers 80 val Mvendorid = 0xF11 81 val Marchid = 0xF12 82 val Mimpid = 0xF13 83 val Mhartid = 0xF14 84 85 // Machine Trap Setup 86 val Mstatus = 0x300 87 val Misa = 0x301 88 val Medeleg = 0x302 89 val Mideleg = 0x303 90 val Mie = 0x304 91 val Mtvec = 0x305 92 val Mcounteren = 0x306 93 94 // Machine Trap Handling 95 val Mscratch = 0x340 96 val Mepc = 0x341 97 val Mcause = 0x342 98 val Mtval = 0x343 99 val Mip = 0x344 100 101 // Machine Memory Protection 102 // TBD 103 val PmpcfgBase = 0x3A0 104 val PmpaddrBase = 0x3B0 105 106 // Machine Counter/Timers 107 // Currently, we uses perfcnt csr set instead of standard Machine Counter/Timers 108 // 0xB80 - 0x89F are also used as perfcnt csr 109 val Mcycle = 0xb00 110 val Minstret = 0xb02 111 112 val Mhpmcounter3 = 0xB03 113 val Mhpmcounter4 = 0xB04 114 val Mhpmcounter5 = 0xB05 115 val Mhpmcounter6 = 0xB06 116 val Mhpmcounter7 = 0xB07 117 val Mhpmcounter8 = 0xB08 118 val Mhpmcounter9 = 0xB09 119 val Mhpmcounter10 = 0xB0A 120 val Mhpmcounter11 = 0xB0B 121 val Mhpmcounter12 = 0xB0C 122 val Mhpmcounter13 = 0xB0D 123 val Mhpmcounter14 = 0xB0E 124 val Mhpmcounter15 = 0xB0F 125 val Mhpmcounter16 = 0xB10 126 val Mhpmcounter17 = 0xB11 127 val Mhpmcounter18 = 0xB12 128 val Mhpmcounter19 = 0xB13 129 val Mhpmcounter20 = 0xB14 130 val Mhpmcounter21 = 0xB15 131 val Mhpmcounter22 = 0xB16 132 val Mhpmcounter23 = 0xB17 133 val Mhpmcounter24 = 0xB18 134 val Mhpmcounter25 = 0xB19 135 val Mhpmcounter26 = 0xB1A 136 val Mhpmcounter27 = 0xB1B 137 val Mhpmcounter28 = 0xB1C 138 val Mhpmcounter29 = 0xB1D 139 val Mhpmcounter30 = 0xB1E 140 val Mhpmcounter31 = 0xB1F 141 142 // Machine Counter Setup (not implemented) 143 val Mcountinhibit = 0x320 144 val Mhpmevent3 = 0x323 145 val Mhpmevent4 = 0x324 146 val Mhpmevent5 = 0x325 147 val Mhpmevent6 = 0x326 148 val Mhpmevent7 = 0x327 149 val Mhpmevent8 = 0x328 150 val Mhpmevent9 = 0x329 151 val Mhpmevent10 = 0x32A 152 val Mhpmevent11 = 0x32B 153 val Mhpmevent12 = 0x32C 154 val Mhpmevent13 = 0x32D 155 val Mhpmevent14 = 0x32E 156 val Mhpmevent15 = 0x32F 157 val Mhpmevent16 = 0x330 158 val Mhpmevent17 = 0x331 159 val Mhpmevent18 = 0x332 160 val Mhpmevent19 = 0x333 161 val Mhpmevent20 = 0x334 162 val Mhpmevent21 = 0x335 163 val Mhpmevent22 = 0x336 164 val Mhpmevent23 = 0x337 165 val Mhpmevent24 = 0x338 166 val Mhpmevent25 = 0x339 167 val Mhpmevent26 = 0x33A 168 val Mhpmevent27 = 0x33B 169 val Mhpmevent28 = 0x33C 170 val Mhpmevent29 = 0x33D 171 val Mhpmevent30 = 0x33E 172 val Mhpmevent31 = 0x33F 173 174 // Debug/Trace Registers (shared with Debug Mode) (not implemented) 175 // Debug Mode Registers 176 val Dcsr = 0x7B0 177 val Dpc = 0x7B1 178 val Dscratch = 0x7B2 179 val Dscratch1 = 0x7B3 180 181 def privEcall = 0x000.U 182 def privEbreak = 0x001.U 183 def privMret = 0x302.U 184 def privSret = 0x102.U 185 def privUret = 0x002.U 186 def privDret = 0x7b2.U 187 188 def ModeM = 0x3.U 189 def ModeH = 0x2.U 190 def ModeS = 0x1.U 191 def ModeU = 0x0.U 192 193 def IRQ_UEIP = 0 194 def IRQ_SEIP = 1 195 def IRQ_MEIP = 3 196 197 def IRQ_UTIP = 4 198 def IRQ_STIP = 5 199 def IRQ_MTIP = 7 200 201 def IRQ_USIP = 8 202 def IRQ_SSIP = 9 203 def IRQ_MSIP = 11 204 205 def IRQ_DEBUG = 12 206 207 val Asid_true_len = 16 208 209 def Asid_true_mask(AsidLength : Int) : UInt = { 210 val res = Wire(Vec(Asid_true_len,Bool())) 211 (0 until Asid_true_len).map(i => { 212 res(i) := (i <= AsidLength).B 213 }) 214 Cat(res.reverse) 215 // val zero = "h0".U(1.W) 216 // val one = "h1".U(1.W) 217 // val mask_high = Fill(Asid_true_len - AsidLength, zero) 218 // val mask_low = Fill(AsidLength, one) 219 220 // Cat(mask_high, mask_low) 221 } 222 223 val IntPriority = Seq( 224 IRQ_DEBUG, 225 IRQ_MEIP, IRQ_MSIP, IRQ_MTIP, 226 IRQ_SEIP, IRQ_SSIP, IRQ_STIP, 227 IRQ_UEIP, IRQ_USIP, IRQ_UTIP 228 ) 229 230 def csrAccessPermissionCheck(addr: UInt, wen: Bool, mode: UInt): Bool = { 231 val readOnly = addr(11,10) === "b11".U 232 val lowestAccessPrivilegeLevel = addr(9,8) 233 mode >= lowestAccessPrivilegeLevel && !(wen && readOnly) 234 } 235 236 def perfcntPermissionCheck(addr: UInt, mode: UInt, mmask: UInt, smask: UInt): Bool = { 237 val index = UIntToOH(addr & 31.U) 238 Mux(mode === ModeM, true.B, Mux(mode === ModeS, (index & mmask) =/= 0.U, (index & mmask & smask) =/= 0.U)) 239 } 240} 241