#include <stdio.h>
#include "riscv.h"
#include "type.h"
#include "debug.h"
#include "plic/plic.h"
#include "irq_handler_stub.h"

Overview

Trap (Interrupt) and Exception Handling Definitions.

Author: Efinix Inc

This file defines the entry point for all processor traps (trap_entry), as well as the C-level dispatchers for Interrupts (trap()) and Exceptions (crash()).

Copyright: 2013-2026 Efinix Inc. All rights reserved.
See the full License Information for Efinix and SaxonSoc MIT terms.

Definition in file mtrap.h.

Macros
#define	STORE "sw"
	Store Word (32-bit).
#define	LOAD "lw"
	Load Word (32-bit).
#define	WORD 4
	Word size in bytes.
#define	STR1(x)
	Context Helper Only.
#define	STR(x)
	Context Helper Only.

Functions
Main Trap Entry Point (Naked).
Hardware vector target (written to mtvec).
void	trap_entry (void)
	The Main Trap Entry Point (Naked).
CPU Interrupt Handler.
Handle interrupt from external, timer, software interrupts. Note These are weak aliases pointing to irq_handleDefault. The user can override them by defining a function with the same name.
int	irq_handleSoft (void)
	Handlers for CPU interrupts (Software).
int	irq_handleTimer (void)
	Handlers for CPU interrupts (Timer).
void	irq_handleExt (void)
	External Interrupt Handler (PLIC).
Dispatcher/Exception Handlers (Function)
Trap Dispatcher mainly for external interrupt and exception handler. Note These are weak aliases pointing to irq_handleDefault. The user can override them by defining a function with the same name.
void	trap (void)
	Main C Trap Dispatcher.
void	crash (void)
	Fatal Exception Handler.

Overview

Macros

Functions