80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include "riscv-traps.h"
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#include "riscv-csr.h"
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// Expect this to increment one time per second - inside exception handler, after each return of MTI handler.
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static volatile uint64_t ecall_count = 0;
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void exception(uintptr_t mcause, uintptr_t mepc, uintptr_t mtval) {
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switch(mcause) {
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case RISCV_EXCP_INSTRUCTION_ADDRESS_MISALIGNED: {
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puts("[EXCEPTION] : Instruction address misaligned\n");
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break;
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}
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case RISCV_EXCP_INSTRUCTION_ACCESS_FAULT: {
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puts("[EXCEPTION] : Instruction access fault\n");
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break;
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}
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case RISCV_EXCP_ILLEGAL_INSTRUCTION: {
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puts("[EXCEPTION] : Illegal Instruction\n");
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break;
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}
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case RISCV_EXCP_BREAKPOINT: {
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puts("[EXCEPTION] : Breakpoint\n");
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break;
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}
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case RISCV_EXCP_LOAD_ADDRESS_MISALIGNED: {
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puts("[EXCEPTION] : Load address misaligned");
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printf("[EXCEPTION] : PC: 0x%x\n", mepc);
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printf("[EXCEPTION] : Addr: 0x%x\n", mtval);
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break;
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}
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case RISCV_EXCP_LOAD_ACCESS_FAULT: {
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puts("[EXCEPTION] : Load access fault\n");
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break;
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}
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case RISCV_EXCP_STORE_AMO_ADDRESS_MISALIGNED: {
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puts("[EXCEPTION] : Store/AMO address misaligned");
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printf("[EXCEPTION] : PC: 0x%x\n", mepc);
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printf("[EXCEPTION] : Addr: 0x%x\n", mtval);
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break;
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}
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case RISCV_EXCP_STORE_AMO_ACCESS_FAULT: {
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puts("[EXCEPTION] : Store/AMO access fault\n");
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break;
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}
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case RISCV_EXCP_ENVIRONMENT_CALL_FROM_U_MODE: {
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puts("[EXCEPTION] : Environment call from U-mode\n");
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break;
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}
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case RISCV_EXCP_ENVIRONMENT_CALL_FROM_S_MODE: {
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puts("[EXCEPTION] : Environment call from S-mode\n");
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break;
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}
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case RISCV_EXCP_ENVIRONMENT_CALL_FROM_M_MODE: {
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puts("[EXCEPTION] : Environment call from M-mode\n");
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ecall_count++;
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csr_write_mepc(mepc+4);
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break;
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}
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case RISCV_EXCP_INSTRUCTION_PAGE_FAULT: {
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puts("[EXCEPTION] : Instruction page fault\n");
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break;
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}
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case RISCV_EXCP_LOAD_PAGE_FAULT: {
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puts("[EXCEPTION] : Load page fault\n");
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break;
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}
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case RISCV_EXCP_STORE_AMO_PAGE_FAULT: {
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puts("[EXCEPTION] : Store/AMO page fault\n");
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break;
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}
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default: {
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printf("[EXCEPTION] : Unknown trap cause: %lu\n", mcause);
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}
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}
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while(1)
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;
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}
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