| /* 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 */ |
