rom_isrs.h

// Copyright lowRISC contributors (OpenTitan project).
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
 
#ifndef OPENTITAN_SW_DEVICE_SILICON_CREATOR_ROM_ROM_ISRS_H_
#define OPENTITAN_SW_DEVICE_SILICON_CREATOR_ROM_ROM_ISRS_H_
 
#include <stdnoreturn.h>
 
#ifdef __cplusplus
extern "C" {
#endif  // __cplusplus
 
/**
 * Denotes functions that have to use the interrupt handler ABI.
 *
 * These must be 4-byte aligned. Note that they don't use the `interrupt`
 * attribute since ROM handlers shut down the chip instead of returning like
 * regular handlers.
 */
#define ROM_INTERRUPT_HANDLER_ABI __attribute__((aligned(4)))
 
/**
 * Denotes functions that have to be near the interrupt vector, because they
 * are jumped to from it.
 */
#define ROM_VECTOR_FUNCTION __attribute__((section(".rom_isrs")))
 
/**
 * ROM hardware exception handler.
 */
ROM_VECTOR_FUNCTION
ROM_INTERRUPT_HANDLER_ABI
noreturn void rom_interrupt_handler(void);
 
#ifdef __cplusplus
}  // extern "C"
#endif  // __cplusplus
 
#endif  // OPENTITAN_SW_DEVICE_SILICON_CREATOR_ROM_ROM_ISRS_H_