From 6f2e5a0eb73340bab93e393a13796716aaf0c036 Mon Sep 17 00:00:00 2001 From: Dolu1990 Date: Wed, 20 Mar 2019 20:28:04 +0100 Subject: [PATCH] goldenmodel Implement some of the supervisor CSR --- src/test/cpp/regression/main.cpp | 182 +++++++++++++++++++++---------- 1 file changed, 123 insertions(+), 59 deletions(-) diff --git a/src/test/cpp/regression/main.cpp b/src/test/cpp/regression/main.cpp index a3e7e0b..99f7ad4 100644 --- a/src/test/cpp/regression/main.cpp +++ b/src/test/cpp/regression/main.cpp @@ -190,21 +190,49 @@ class success : public std::exception { }; #define MCYCLEH 0xB80 // MRW Upper 32 bits of mcycle, RV32I only. #define MINSTRETH 0xB82 // MRW Upper 32 bits of minstret, RV32I only. + +#define SSTATUS 0x100 +#define SIE 0x104 +#define STVEC 0x105 +#define SCOUNTEREN 0x106 +#define SSCRATCH 0x140 +#define SEPC 0x141 +#define SCAUSE 0x142 +#define STVAL 0x143 +#define SIP 0x144 +#define SATP 0x180 + + + +#define SSTATUS_SIE 0x00000002 +#define SSTATUS_SPIE 0x00000020 +#define SSTATUS_SPP 0x00000100 + class RiscvGolden { public: int32_t pc, lastPc; int32_t regs[32]; + uint32_t mscratch; uint32_t misa; + uint32_t privilege; + + uint32_t medeleg; + uint32_t mideleg; union status { uint32_t raw; struct { - uint32_t _1 : 3; + uint32_t _1a : 1; + uint32_t sie : 1; + uint32_t _1b : 1; uint32_t mie : 1; - uint32_t _2 : 3; + uint32_t _2a : 1; + uint32_t spie : 1; + uint32_t _2b : 1; uint32_t mpie : 1; - uint32_t _3 : 3; + uint32_t spp : 1; + uint32_t _3 : 2; uint32_t mpp : 2; }; }__attribute__((packed)) status; @@ -235,13 +263,16 @@ public: }; }__attribute__((packed)) mie; - union mtvec { + union Xtvec { uint32_t raw; - struct { + struct __attribute__((packed)) { uint32_t _1 : 2; uint32_t base : 30; }; - }__attribute__((packed)) mtvec; + }; + + Xtvec mtvec, stvec; + union mcause { @@ -253,19 +284,16 @@ public: }__attribute__((packed)) mcause; - //Machine CSR -// misaAccess(CSR.MISA, xlen-2 -> misa.base , 0 -> misa.extensions) -// READ_ONLY(CSR.MIP, 11 -> mip.MEIP, 7 -> mip.MTIP) -// READ_WRITE(CSR.MIP, 3 -> mip.MSIP) -// READ_WRITE(CSR.MIE, 11 -> mie.MEIE, 7 -> mie.MTIE, 3 -> mie.MSIE) -// -// mtvecAccess(CSR.MTVEC, mtvec) -// mepcAccess(CSR.MEPC, mepc) -// READ_WRITE(CSR.MSTATUS,11 -> mstatus.MPP, 7 -> mstatus.MPIE, 3 -> mstatus.MIE) -// if(mscratchGen) READ_WRITE(CSR.MSCRATCH, mscratch) -// mcauseAccess(CSR.MCAUSE, xlen-1 -> mcause.interrupt, 0 -> mcause.exceptionCode) -// mbadaddrAccess(CSR.MBADADDR, mbadaddr) - //READ_WRITE(CSR.MSTATUS,11 -> mstatus.MPP, 7 -> mstatus.MPIE, 3 -> mstatus.MIE) + union scause { + uint32_t raw; + struct { + uint32_t exceptionCode : 31; + uint32_t interrupt : 1; + }; + }__attribute__((packed)) scause; + + + RiscvGolden() { pc = 0x80000000; regs[0] = 0; @@ -281,6 +309,9 @@ public: mepc = 0; misa = 0; //TODO status.mpp = 3; + privilege = 3; + medeleg = 0; + mideleg = 0; } virtual void rfWrite(int32_t address, int32_t data) { @@ -296,8 +327,8 @@ public: exception(0, 0, target); } } - uint32_t mbadaddr; - uint32_t mepc; + uint32_t mbadaddr, sbadaddr; + uint32_t mepc, sepc; virtual bool iRead(int32_t address, uint32_t *data) = 0; virtual bool dRead(int32_t address, int32_t size, uint32_t *data) = 0; @@ -310,18 +341,36 @@ public: exception(interrupt, cause, true, value); } void exception(bool interrupt,int32_t cause, bool valueWrite, uint32_t value) { - if(valueWrite){ - mbadaddr = value; - } - mcause.interrupt = interrupt; - mcause.exceptionCode = cause; - status.mie = false; - status.mpie = status.mie; - mepc = pc; - pcWrite(mtvec.base << 2); + uint32_t deleg = interrupt ? mideleg : medeleg; + uint32_t targetPrivilege = 3; + if(deleg & (1 << cause)) targetPrivilege = 1; + Xtvec xtvec = targetPrivilege == 3 ? mtvec : stvec; + + switch(targetPrivilege){ + case 3: + if(valueWrite) mbadaddr = value; + mcause.interrupt = interrupt; + mcause.exceptionCode = cause; + status.mie = false; + status.mpie = status.mie; + status.mpp = privilege; + mepc = pc; + break; + case 1: + if(valueWrite) sbadaddr = value; + scause.interrupt = interrupt; + scause.exceptionCode = cause; + status.sie = false; + status.spie = status.sie; + status.spp = privilege; + sepc = pc; + break; + } + + privilege = targetPrivilege; + pcWrite(xtvec.base << 2); if(interrupt) livenessInterrupt = 0; - //status.MPP := privilege if(!interrupt) step(); //As VexRiscv instruction which trap do not reach writeback stage fire } @@ -333,33 +382,37 @@ public: } - uint32_t* csrPtr(int32_t csr){ - switch(csr){ - case MSTATUS: return &status.raw; break; - case MIP: return &mip.raw; break; - case MIE: return &mie.raw; break; - case MTVEC: return &mtvec.raw; break; - case MCAUSE: return &mcause.raw; break; - case MBADADDR: return &mbadaddr; break; - case MEPC: return &mepc; break; - case MSCRATCH: return &mscratch; break; - case MISA: return &misa; break; - default: ilegalInstruction(); return NULL; break; - } - } virtual bool csrRead(int32_t csr, uint32_t *value){ - auto ptr = csrPtr(csr); - if(ptr){ - *value = *ptr; + switch(csr){ + case MSTATUS: *value = status.raw; break; + case MIP: *value = mip.raw; break; + case MIE: *value = mie.raw; break; + case MTVEC: *value = mtvec.raw; break; + case MCAUSE: *value = mcause.raw; break; + case MBADADDR: *value = mbadaddr; break; + case MEPC: *value = mepc; break; + case MSCRATCH: *value = mscratch; break; + case MISA: *value = misa; break; + default: return true; break; } - return ptr == NULL; + return false; } virtual bool csrWrite(int32_t csr, uint32_t value){ - auto ptr = csrPtr(csr); - if(ptr) *csrPtr(csr) = value; - return ptr == NULL; + switch(csr){ + case MSTATUS: status.raw = value; break; + case MIP: mip.raw = value; break; + case MIE: mie.raw = value; break; + case MTVEC: mtvec.raw = value; break; + case MCAUSE: mcause.raw = value; break; + case MBADADDR: mbadaddr = value; break; + case MEPC: mepc = value; break; + case MSCRATCH: mscratch = value; break; + case MISA: misa = value; break; + default: ilegalInstruction(); return true; break; + } + return false; } @@ -559,19 +612,30 @@ public: if(i32_func3 == 0){ switch(i){ case 0x30200073:{ //MRET - status.mie = status.mpie; - //privilege := mstatus.MPP - pcWrite(mepc); - }break; + if(privilege < 3){ ilegalInstruction(); return;} + status.mpp = 0; + status.mie = status.mpie; + status.mpie = 1; + privilege = status.mpp; + pcWrite(mepc); + }break; + case 0x10200073:{ //SRET + if(privilege < 1){ ilegalInstruction(); return;} + status.spp = 0; + status.sie = status.spie; + status.spie = 1; + privilege = status.spp; + pcWrite(sepc); + }break; case 0x00000073:{ //ECALL exception(0, 11); - }break; + }break; case 0x10500073:{ //WFI pcWrite(pc + 4); - }break; + }break; default: ilegalInstruction(); - break; + break; } } else { //CSR