platform_bionic/libc/include/sys/cachectl.h

/*
 * Copyright (C) 2008 The Android Open Source Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#pragma once

/*
 * @file sys/cachectl.h
 * @brief Architecture-specific cache control.
 */

#include <sys/cdefs.h>

__BEGIN_DECLS

#if defined(__riscv)

/**
 * Flag for __riscv_flush_icache() to indicate that only the current
 * thread's instruction cache needs to be flushed (rather than the
 * default of all threads).
 */
#define SYS_RISCV_FLUSH_ICACHE_LOCAL 1UL

/**
 * __riscv_flush_icache(2) flushes the instruction cache for the given range of addresses.
 * The address range is currently (Linux 6.4) ignored, so both pointers may be null.
 *
 * Returns 0 on success, and returns -1 and sets `errno` on failure.
 */
int __riscv_flush_icache(void* _Nullable __start, void* _Nullable __end, unsigned long __flags);

#endif

__END_DECLS