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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Copyright 2011 Tilera Corporation. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for
* more details.
*/
#ifndef _ASM_TILE_CACHECTL_H
#define _ASM_TILE_CACHECTL_H
/*
* Options for cacheflush system call.
*
* The ICACHE flush is performed on all cores currently running the
* current process's address space. The intent is for user
* applications to be able to modify code, invoke the system call,
* then allow arbitrary other threads in the same address space to see
* the newly-modified code. Passing a length of CHIP_L1I_CACHE_SIZE()
* or more invalidates the entire icache on all cores in the address
* spaces. (Note: currently this option invalidates the entire icache
* regardless of the requested address and length, but we may choose
* to honor the arguments at some point.)
*
* Flush and invalidation of memory can normally be performed with the
* __insn_flush() and __insn_finv() instructions from userspace.
* The DCACHE option to the system call allows userspace
* to flush the entire L1+L2 data cache from the core. In this case,
* the address and length arguments are not used. The DCACHE flush is
* restricted to the current core, not all cores in the address space.
*/
#define ICACHE (1<<0) /* invalidate L1 instruction cache */
#define DCACHE (1<<1) /* flush and invalidate data cache */
#define BCACHE (ICACHE|DCACHE) /* flush both caches */
#endif /* _ASM_TILE_CACHECTL_H */
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