1/*************************************************************************************** 2* Copyright (c) 2024 Beijing Institute of Open Source Chip (BOSC) 3* Copyright (c) 2020-2024 Institute of Computing Technology, Chinese Academy of Sciences 4* Copyright (c) 2020-2021 Peng Cheng Laboratory 5* 6* XiangShan is licensed under Mulan PSL v2. 7* You can use this software according to the terms and conditions of the Mulan PSL v2. 8* You may obtain a copy of Mulan PSL v2 at: 9* http://license.coscl.org.cn/MulanPSL2 10* 11* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, 12* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, 13* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE. 14* 15* See the Mulan PSL v2 for more details. 16***************************************************************************************/ 17 18package xiangshan.cache.mmu 19 20import org.chipsalliance.cde.config.Parameters 21import chisel3._ 22import chisel3.util._ 23import xiangshan._ 24import xiangshan.cache.{HasDCacheParameters, MemoryOpConstants} 25import utils._ 26import utility._ 27import freechips.rocketchip.diplomacy.{LazyModule, LazyModuleImp} 28import freechips.rocketchip.tilelink._ 29 30 31case class TLBParameters 32( 33 name: String = "none", 34 fetchi: Boolean = false, // TODO: remove it 35 fenceDelay: Int = 2, 36 useDmode: Boolean = true, 37 NSets: Int = 1, 38 NWays: Int = 2, 39 Replacer: Option[String] = Some("plru"), 40 Associative: String = "fa", // must be fa 41 outReplace: Boolean = false, 42 partialStaticPMP: Boolean = false, // partial static pmp result stored in entries 43 outsideRecvFlush: Boolean = false, // if outside moudle waiting for tlb recv flush pipe 44 saveLevel: Boolean = false, 45 lgMaxSize: Int = 3 46) 47 48case class L2TLBParameters 49( 50 name: String = "l2tlb", 51 // l3 52 l3Size: Int = 16, 53 l3Associative: String = "fa", 54 l3Replacer: Option[String] = Some("plru"), 55 // l2 56 l2Size: Int = 16, 57 l2Associative: String = "fa", 58 l2Replacer: Option[String] = Some("plru"), 59 // l1 60 l1nSets: Int = 8, 61 l1nWays: Int = 4, 62 l1Replacer: Option[String] = Some("setplru"), 63 // l0 64 l0nSets: Int = 32, 65 l0nWays: Int = 8, 66 l0Replacer: Option[String] = Some("setplru"), 67 // sp 68 spSize: Int = 16, 69 spReplacer: Option[String] = Some("plru"), 70 // filter 71 ifilterSize: Int = 8, 72 dfilterSize: Int = 32, 73 // miss queue, add more entries than 'must require' 74 // 0 for easier bug trigger, please set as big as u can, 8 maybe 75 missqueueExtendSize: Int = 0, 76 // llptw 77 llptwsize: Int = 6, 78 // way size 79 blockBytes: Int = 64, 80 // prefetch 81 enablePrefetch: Boolean = true, 82 // ecc 83 ecc: Option[String] = Some("secded"), 84 // enable ecc 85 enablePTWECC: Boolean = false 86) 87 88trait HasTlbConst extends HasXSParameter { 89 val Level = if (EnableSv48) 3 else 2 90 91 val offLen = 12 92 val ppnLen = PAddrBits - offLen 93 val vpnnLen = 9 94 val extendVpnnBits = if (HasHExtension) 2 else 0 95 val vpnLen = VAddrBits - offLen // when opening H extention, vpnlen broaden two bits 96 /* 97 Sv39 page table entry 98 +--+------+--------+----------------------+-----+--------+ 99 |63|62 61|60 54|53 10|9 8|7 0| 100 +--+------+--------+----------------------+-----+--------+ 101 |N | PBMT |Reserved| PPNs | RSW | FALG | 102 +--+------+--------+----------------------+-----+--------+ 103 */ 104 val pteFlagLen = 8 105 val pteRswLen = 2 106 val ptePPNLen = 44 107 val pteResLen = 7 108 val ptePbmtLen = 2 109 val pteNLen = 1 110 val ppnHignLen = ptePPNLen - ppnLen 111 val gvpnLen = GPAddrBits - offLen 112 113 val tlbcontiguous = 8 114 val sectortlbwidth = log2Up(tlbcontiguous) 115 val sectorppnLen = ppnLen - sectortlbwidth 116 val sectorgvpnLen = gvpnLen - sectortlbwidth 117 val sectorvpnLen = vpnLen - sectortlbwidth 118 val sectorptePPNLen = ptePPNLen - sectortlbwidth 119 120 val loadfiltersize = 16 // 4*3(LduCnt:2 + HyuCnt:1) + 4(prefetch:1) 121 val storefiltersize = if (StorePipelineWidth >= 3) 16 else 8 122 val prefetchfiltersize = 8 123 124 val sramSinglePort = true 125 126 val timeOutThreshold = 10000 127 128 def noS2xlate = "b00".U 129 def allStage = "b11".U 130 def onlyStage1 = "b01".U 131 def onlyStage2 = "b10".U 132 133 def Sv39 = "h8".U 134 def Sv48 = "h9".U 135 136 def get_pn(addr: UInt) = { 137 require(addr.getWidth > offLen) 138 addr(addr.getWidth-1, offLen) 139 } 140 def get_off(addr: UInt) = { 141 require(addr.getWidth > offLen) 142 addr(offLen-1, 0) 143 } 144 145 def get_set_idx(vpn: UInt, nSets: Int): UInt = { 146 require(nSets >= 1) 147 vpn(log2Up(nSets)-1, 0) 148 } 149 150 def drop_set_idx(vpn: UInt, nSets: Int): UInt = { 151 require(nSets >= 1) 152 require(vpn.getWidth > log2Ceil(nSets)) 153 vpn(vpn.getWidth-1, log2Ceil(nSets)) 154 } 155 156 def drop_set_equal(vpn1: UInt, vpn2: UInt, nSets: Int): Bool = { 157 require(nSets >= 1) 158 require(vpn1.getWidth == vpn2.getWidth) 159 if (vpn1.getWidth <= log2Ceil(nSets)) { 160 true.B 161 } else { 162 drop_set_idx(vpn1, nSets) === drop_set_idx(vpn2, nSets) 163 } 164 } 165 166 def replaceWrapper(v: UInt, lruIdx: UInt): UInt = { 167 val width = v.getWidth 168 val emptyIdx = ParallelPriorityMux((0 until width).map( i => (!v(i), i.U(log2Up(width).W)))) 169 val full = Cat(v).andR 170 Mux(full, lruIdx, emptyIdx) 171 } 172 173 def replaceWrapper(v: Seq[Bool], lruIdx: UInt): UInt = { 174 replaceWrapper(VecInit(v).asUInt, lruIdx) 175 } 176 177 import scala.language.implicitConversions 178 179 implicit def hptwresp_to_tlbperm(hptwResp: HptwResp): TlbPermBundle = { 180 val tp = Wire(new TlbPermBundle) 181 val ptePerm = hptwResp.entry.perm.get.asTypeOf(new PtePermBundle().cloneType) 182 tp.pf := hptwResp.gpf 183 tp.af := hptwResp.gaf 184 tp.d := ptePerm.d 185 tp.a := ptePerm.a 186 tp.g := ptePerm.g 187 tp.u := ptePerm.u 188 tp.x := ptePerm.x 189 tp.w := ptePerm.w 190 tp.r := ptePerm.r 191 tp 192 } 193 194 implicit def ptwresp_to_tlbperm(ptwResp: PtwSectorResp): TlbPermBundle = { 195 val tp = Wire(new TlbPermBundle) 196 val ptePerm = ptwResp.entry.perm.get.asTypeOf(new PtePermBundle().cloneType) 197 tp.pf := ptwResp.pf 198 tp.af := ptwResp.af 199 tp.d := ptePerm.d 200 tp.a := ptePerm.a 201 tp.g := ptePerm.g 202 tp.u := ptePerm.u 203 tp.x := ptePerm.x 204 tp.w := ptePerm.w 205 tp.r := ptePerm.r 206 tp 207 } 208} 209 210trait HasPtwConst extends HasTlbConst with MemoryOpConstants{ 211 val PtwWidth = 2 212 val sourceWidth = { if (l2tlbParams.enablePrefetch) PtwWidth + 1 else PtwWidth} 213 val prefetchID = PtwWidth 214 215 val blockBits = l2tlbParams.blockBytes * 8 216 217 val bPtwWidth = log2Up(PtwWidth) 218 val bSourceWidth = log2Up(sourceWidth) 219 // ptwl3: fully-associated 220 val PtwL3TagLen = if (EnableSv48) vpnnLen + extendVpnnBits else 0 221 // ptwl2: fully-associated 222 val PtwL2TagLen = if (EnableSv48) vpnnLen * 2 + extendVpnnBits else vpnnLen + extendVpnnBits 223 224 /* +-------+----------+-------------+ 225 * | Tag | SetIdx | SectorIdx | 226 * +-------+----------+-------------+ 227 */ 228 // ptwl1: 8-way group-associated 229 val PtwL1SetNum = l2tlbParams.l1nSets 230 val PtwL1SectorSize = blockBits / XLEN 231 val PtwL1IdxLen = log2Up(PtwL1SetNum * PtwL1SectorSize) 232 val PtwL1SectorIdxLen = log2Up(PtwL1SectorSize) 233 val PtwL1SetIdxLen = log2Up(PtwL1SetNum) 234 val PtwL1TagLen = if (EnableSv48) vpnnLen * 3 - PtwL1IdxLen + extendVpnnBits else vpnnLen * 2 - PtwL1IdxLen + extendVpnnBits 235 236 // ptwl0: 16-way group-associated 237 val PtwL0SetNum = l2tlbParams.l0nSets 238 val PtwL0SectorSize = blockBits / XLEN 239 val PtwL0IdxLen = log2Up(PtwL0SetNum * PtwL0SectorSize) 240 val PtwL0SectorIdxLen = log2Up(PtwL0SectorSize) 241 val PtwL0SetIdxLen = log2Up(PtwL0SetNum) 242 val PtwL0TagLen = if (EnableSv48) vpnnLen * 4 - PtwL0IdxLen + extendVpnnBits else vpnnLen * 3 - PtwL0IdxLen + extendVpnnBits 243 244 // super page, including 1GB and 2MB page 245 val SPTagLen = if (EnableSv48) vpnnLen * 3 + extendVpnnBits else vpnnLen * 2 + extendVpnnBits 246 247 // miss queue 248 val MissQueueSize = l2tlbParams.ifilterSize + l2tlbParams.dfilterSize 249 val MemReqWidth = l2tlbParams.llptwsize + 1 + 1 250 val HptwReqId = l2tlbParams.llptwsize + 1 251 val FsmReqID = l2tlbParams.llptwsize 252 val bMemID = log2Up(MemReqWidth) 253 254 def genPtwL1Idx(vpn: UInt) = { 255 (vpn(vpnLen - 1, vpnnLen))(PtwL1IdxLen - 1, 0) 256 } 257 258 def genPtwL1SectorIdx(vpn: UInt) = { 259 genPtwL1Idx(vpn)(PtwL1SectorIdxLen - 1, 0) 260 } 261 262 def genPtwL1SetIdx(vpn: UInt) = { 263 genPtwL1Idx(vpn)(PtwL1SetIdxLen + PtwL1SectorIdxLen - 1, PtwL1SectorIdxLen) 264 } 265 266 def genPtwL0Idx(vpn: UInt) = { 267 vpn(PtwL0IdxLen - 1, 0) 268 } 269 270 def genPtwL0SectorIdx(vpn: UInt) = { 271 genPtwL0Idx(vpn)(PtwL0SectorIdxLen - 1, 0) 272 } 273 274 def dropL0SectorBits(vpn: UInt) = { 275 vpn(vpn.getWidth-1, PtwL0SectorIdxLen) 276 } 277 278 def genPtwL0SetIdx(vpn: UInt) = { 279 genPtwL0Idx(vpn)(PtwL0SetIdxLen + PtwL0SectorIdxLen - 1, PtwL0SectorIdxLen) 280 } 281 282 def MakeAddr(ppn: UInt, off: UInt) = { 283 require(off.getWidth == 9) 284 Cat(ppn, off, 0.U(log2Up(XLEN/8).W)) 285 } 286 287 def MakeGPAddr(ppn: UInt, off: UInt) = { 288 require(off.getWidth == 9 || off.getWidth == 11) 289 (Cat(ppn, 0.U(offLen.W)) + Cat(off, 0.U(log2Up(XLEN / 8).W)))(GPAddrBits - 1, 0) 290 } 291 292 def getVpnn(vpn: UInt, idx: Int): UInt = { 293 vpn(vpnnLen*(idx+1)-1, vpnnLen*idx) 294 } 295 296 def getVpnn(vpn: UInt, idx: UInt): UInt = { 297 MuxLookup(idx, 0.U)(Seq( 298 0.U -> vpn(vpnnLen - 1, 0), 299 1.U -> vpn(vpnnLen * 2 - 1, vpnnLen), 300 2.U -> vpn(vpnnLen * 3 - 1, vpnnLen * 2), 301 3.U -> vpn(vpnnLen * 4 - 1, vpnnLen * 3)) 302 ) 303 } 304 305 def getGVpnn(vpn: UInt, idx: UInt, mode: UInt): UInt = { 306 MuxLookup(idx, 0.U)(Seq( 307 0.U -> vpn(vpnnLen - 1, 0), 308 1.U -> vpn(vpnnLen * 2 - 1, vpnnLen), 309 2.U -> Mux(mode === Sv48, vpn(vpnnLen * 3 - 1, vpnnLen * 2), vpn(vpnnLen * 3 + 1, vpnnLen * 2)), 310 3.U -> vpn(vpnnLen * 4 + 1, vpnnLen * 3)) 311 ) 312 } 313 314 def getVpnClip(vpn: UInt, level: Int) = { 315 // level 2 /* vpnn2 */ 316 // level 1 /* vpnn2 * vpnn1 */ 317 // level 0 /* vpnn2 * vpnn1 * vpnn0*/ 318 vpn(vpnLen - 1, level * vpnnLen) 319 } 320 321 def get_next_line(vpn: UInt) = { 322 Cat(dropL0SectorBits(vpn) + 1.U, 0.U(PtwL0SectorIdxLen.W)) 323 } 324 325 def same_l1entry(vpn1: UInt, vpn2: UInt) = { 326 vpn1(vpnLen-1, vpnnLen) === vpn2(vpnLen-1, vpnnLen) 327 } 328 329 def from_pre(source: UInt) = { 330 (source === prefetchID.U) 331 } 332 333 def sel_data(data: UInt, index: UInt): UInt = { 334 val inner_data = data.asTypeOf(Vec(data.getWidth / XLEN, UInt(XLEN.W))) 335 inner_data(index) 336 } 337 338 // vpn1 and vpn2 is at same cacheline 339 def dup(vpn1: UInt, vpn2: UInt): Bool = { 340 dropL0SectorBits(vpn1) === dropL0SectorBits(vpn2) 341 } 342 343 344 def printVec[T <: Data](x: Seq[T]): Printable = { 345 (0 until x.length).map(i => p"(${i.U})${x(i)} ").reduce(_+_) 346 } 347} 348