vhaudiquet/vriscv
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added messages for privileged instructions

Browse Source
This commit is contained in:
Valentin Haudiquet
2023-10-09 21:49:10 +02:00
parent 12c05b4879
commit 948ff6493b
2 changed files with 49 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/cpu/instruction.h
View File

@@ -96,6 +96,13 @@
#define FUNC3_ECALL_EBREAK 0x0
#define IMM_ECALL 0x0
#define IMM_EBREAK 0x1
/* RISC-V Privileged Instructions */
#define FUNC7_SFENCEVMA 0x9
#define FUNC7_WFI 0x8
#define FUNC7_SINVALVMA 0x11
#define FUNC7_SFENCEWINVAL_SFENCEINVALIR 0xC
#define IMM5_SFENCEWINVAL 0x0
#define IMM5_SFENCEINVALIR 0x1
/* RISC-V RV32 ZICSR Extension */
#define FUNC3_CSRRW 0x1
#define FUNC3_CSRRS 0x2

39
src/cpu/rv32cpu.c
View File

@@ -517,12 +517,23 @@ static void cpu_execute(rv32_cpu_t* cpu, instruction_t* instruction)
cpu->sim_ticks_left = 1;
cpu->pc -= 4;
break;
default:
switch(instruction->func7)
{
case FUNC7_SFENCEVMA:
fprintf(stderr, "SFENCE.VMA: Guest kernel must think we have an MMU. We have none.\n");
break;
case FUNC7_WFI:
fprintf(stderr, "WFI: Guest kernel must think we have interrupts. We have none.\n");
break;
default:
fprintf(stderr, "FATAL: Unknown IMM for ECALL/EBREAK instruction while executing (IMM=0x%x)\n", instruction->immediate);
exit(EXIT_FAILURE);
break;
}
break;
}
break;
case FUNC3_CSRRW:
fprintf(stderr, "CSRRW\n");
break;
@@ -1052,11 +1063,39 @@ static void cpu_print_instruction(instruction_t* instruction)
case IMM_EBREAK:
printf("ebreak\n");
break;
default:
switch(instruction->func7)
{
case FUNC7_WFI:
printf("wfi\n");
break;
case FUNC7_SFENCEVMA:
printf("sfence.vma\n");
break;
case FUNC7_SINVALVMA:
printf("sinval.vma\n");
break;
case FUNC7_SFENCEWINVAL_SFENCEINVALIR:
switch(instruction->immediate & 0x1F)
{
case IMM5_SFENCEWINVAL:
printf("sfence.w.inval\n");
break;
case IMM5_SFENCEINVALIR:
printf("sfence.inval.ir\n");
break;
default:
fprintf(stderr, "Warning: Unknown IMM for SFENCEWINVAL/SFENCEINVALIR instruction (IMM=0x%x)\n", instruction->immediate);
break;
}
break;
default:
fprintf(stderr, "Warning: Unknown IMM for ECALL/EBREAK instruction (IMM=0x%x)\n", instruction->immediate);
break;
}
break;
}
break;
case FUNC3_CSRRW:
printf("csrrw csr[0x%x], x%u, x%u\n", instruction->immediate, instruction->rd, instruction->rs1);
break;