hart_polyfills.c

// Copyright lowRISC contributors (OpenTitan project).
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
 
#define _DEFAULT_SOURCE  // Make sure we get usleep() from unistd.h.
 
#include <stddef.h>
#include <unistd.h>
 
#include "sw/device/lib/runtime/hart.h"
 
void busy_spin_micros(uint32_t usec) { usleep(usec); }
 
// Because this function is defined by libc as well, we do not bother
// defining abort() on-target.
//
// noreturn void abort(void);
 
// `extern` declarations to give the inline functions in the
// corresponding header a link location.
 
extern void wait_for_interrupt(void);
extern void icache_invalidate(void);