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Unaligned jalr raise exception, ecall raise exception

This commit is contained in:
Màrius Montón 2021-09-01 09:11:45 +02:00
parent 06748d99bc
commit f029d365be
1 changed files with 26 additions and 15 deletions
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31
src/BASE_ISA.cpp
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@ -141,7 +141,7 @@ bool BASE_ISA::Exec_JAL() const {
return true;
}
bool BASE_ISA::Exec_JALR() const {
bool BASE_ISA::Exec_JALR() {
uint32_t mem_addr = 0;
int rd, rs1;
int new_pc, old_pc;
@ -154,12 +154,21 @@ bool BASE_ISA::Exec_JALR() const {
regs->setValue(rd, old_pc + 4);
new_pc = static_cast<int32_t>((regs->getValue(rs1) + mem_addr) & 0xFFFFFFFE);
if( (new_pc & 0x00000003) != 0) {
// not aligned
log->SC_log(Log::ERROR) << "JALR: x" << std::dec << rd << " <- 0x"
<< std::hex << old_pc + 4 << " PC <- 0x" << new_pc << "\n";
log->SC_log(Log::ERROR) << "JALR : Exception\n";
RaiseException(EXCEPTION_CAUSE_LOAD_ADDR_MISALIGN, m_instr);
} else {
regs->setPC(new_pc);
if (log->getLogLevel() >= Log::INFO) {
log->SC_log(Log::INFO) << "JALR: x" << std::dec << rd << " <- 0x"
<< std::hex << old_pc + 4 << " PC <- 0x" << new_pc << "\n";
}
}
return true;
}
@ -912,7 +921,7 @@ bool BASE_ISA::Exec_FENCE() const {
return true;
}
bool BASE_ISA::Exec_ECALL() const {
bool BASE_ISA::Exec_ECALL() {
log->SC_log(Log::INFO) << "ECALL" << "\n" << std::flush ;
std::cout << "\n" << "ECALL Instruction called, stopping simulation"
@ -921,6 +930,7 @@ bool BASE_ISA::Exec_ECALL() const {
std::cout << "Simulation time " << sc_core::sc_time_stamp() << "\n";
perf->dump();
#if 0
uint32_t gp_value = regs->getValue(Registers::gp);
if (gp_value == 1) {
std::cout << "GP value is 1, test result is OK" << "\n";
@ -929,22 +939,24 @@ bool BASE_ISA::Exec_ECALL() const {
}
sc_core::sc_stop();
#else
RaiseException(11, m_instr);
#endif
return true;
}
bool BASE_ISA::Exec_EBREAK() {
log->SC_log(Log::INFO) << "EBREAK" << "\n";
std::cout << "\n" << "EBRAK Instruction called, dumping information"
log->SC_log(Log::INFO) << "EBREAK" << "\n" << std::flush;
std::cout << "\n" << "EBREAK Instruction called, dumping information"
<< "\n";
regs->dump();
std::cout << "Simulation time " << sc_core::sc_time_stamp() << "\n";
perf->dump();
sc_core::sc_stop();
RaiseException(11, m_instr);
return true;
return false;
}
bool BASE_ISA::Exec_CSRRW() const {
@ -1295,9 +1307,8 @@ bool BASE_ISA::process_instruction(Instruction *inst, bool *breakpoint) {
std::cout << "ECALL" << std::endl;
break;
case OP_EBREAK:
Exec_EBREAK();
*breakpoint = true;
std::cout << "EBREAK" << std::endl;
PC_not_affected = Exec_EBREAK();
// *breakpoint = true;
break;
case OP_CSRRW:
Exec_CSRRW();