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This commit is contained in:
Eyck-Alexander Jentzsch
2026-05-28 12:36:29 +02:00
parent b27cf7d852
commit d45a8f9231
2 changed files with 44 additions and 27 deletions
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port/moonlight/src/exception.c
+39 -22
View File
@@ -1,83 +1,100 @@
#include "riscv-csr.h"
#include "riscv-traps.h"
#include <stdint.h>
#include <stdio.h>
#include "riscv-traps.h"
#include "riscv-csr.h"
// Expect this to increment one time per second - inside exception handler, after each return of MTI handler.
static volatile uint64_t ecall_count = 0;
#ifdef NX_DEBUG
#define PUTS(STR) puts(STR)
#define PUTS(STR) puts(STR)
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PUTS(STR)
#define PRINTF(...)
#endif
void exception(uintptr_t mcause, uintptr_t mepc, uintptr_t mtval) {
switch(mcause) {
case RISCV_EXCP_INSTRUCTION_ADDRESS_MISALIGNED: {
void exception(uintptr_t mcause, uintptr_t mepc, uintptr_t mtval)
{
switch (mcause)
{
case RISCV_EXCP_INSTRUCTION_ADDRESS_MISALIGNED:
{
puts("[EXCEPTION] : Instruction address misaligned\n");
break;
}
case RISCV_EXCP_INSTRUCTION_ACCESS_FAULT: {
case RISCV_EXCP_INSTRUCTION_ACCESS_FAULT:
{
puts("[EXCEPTION] : Instruction access fault\n");
break;
}
case RISCV_EXCP_ILLEGAL_INSTRUCTION: {
case RISCV_EXCP_ILLEGAL_INSTRUCTION:
{
puts("[EXCEPTION] : Illegal Instruction\n");
break;
}
case RISCV_EXCP_BREAKPOINT: {
case RISCV_EXCP_BREAKPOINT:
{
puts("[EXCEPTION] : Breakpoint\n");
break;
}
case RISCV_EXCP_LOAD_ADDRESS_MISALIGNED: {
case RISCV_EXCP_LOAD_ADDRESS_MISALIGNED:
{
puts("[EXCEPTION] : Load address misaligned");
break;
}
case RISCV_EXCP_LOAD_ACCESS_FAULT: {
case RISCV_EXCP_LOAD_ACCESS_FAULT:
{
puts("[EXCEPTION] : Load access fault\n");
break;
}
case RISCV_EXCP_STORE_AMO_ADDRESS_MISALIGNED: {
case RISCV_EXCP_STORE_AMO_ADDRESS_MISALIGNED:
{
puts("[EXCEPTION] : Store/AMO address misaligned");
break;
}
case RISCV_EXCP_STORE_AMO_ACCESS_FAULT: {
case RISCV_EXCP_STORE_AMO_ACCESS_FAULT:
{
puts("[EXCEPTION] : Store/AMO access fault\n");
break;
}
case RISCV_EXCP_ENVIRONMENT_CALL_FROM_U_MODE: {
case RISCV_EXCP_ENVIRONMENT_CALL_FROM_U_MODE:
{
puts("[EXCEPTION] : Environment call from U-mode\n");
break;
}
case RISCV_EXCP_ENVIRONMENT_CALL_FROM_S_MODE: {
case RISCV_EXCP_ENVIRONMENT_CALL_FROM_S_MODE:
{
puts("[EXCEPTION] : Environment call from S-mode\n");
break;
}
case RISCV_EXCP_ENVIRONMENT_CALL_FROM_M_MODE: {
case RISCV_EXCP_ENVIRONMENT_CALL_FROM_M_MODE:
{
puts("[EXCEPTION] : Environment call from M-mode\n");
ecall_count++;
csr_write_mepc(mepc+4);
csr_write_mepc(mepc + 4);
break;
}
case RISCV_EXCP_INSTRUCTION_PAGE_FAULT: {
case RISCV_EXCP_INSTRUCTION_PAGE_FAULT:
{
puts("[EXCEPTION] : Instruction page fault\n");
break;
}
case RISCV_EXCP_LOAD_PAGE_FAULT: {
case RISCV_EXCP_LOAD_PAGE_FAULT:
{
puts("[EXCEPTION] : Load page fault\n");
break;
}
case RISCV_EXCP_STORE_AMO_PAGE_FAULT: {
case RISCV_EXCP_STORE_AMO_PAGE_FAULT:
{
puts("[EXCEPTION] : Store/AMO page fault\n");
break;
}
default: {
default:
{
printf("[EXCEPTION] : Unknown trap cause: %lu\n", mcause);
}
}
printf("[EXCEPTION] : PC: 0x%x\n", mepc);
printf("[EXCEPTION] : Addr: 0x%x\n", mtval);
while(1)
while (1)
;
}