e2be04c7f9
Many user space API headers have licensing information, which is either
incomplete, badly formatted or just a shorthand for referring to the
license under which the file is supposed to be. This makes it hard for
compliance tools to determine the correct license.
Update these files with an SPDX license identifier. The identifier was
chosen based on the license information in the file.
GPL/LGPL licensed headers get the matching GPL/LGPL SPDX license
identifier with the added 'WITH Linux-syscall-note' exception, which is
the officially assigned exception identifier for the kernel syscall
exception:
NOTE! This copyright does *not* cover user programs that use kernel
services by normal system calls - this is merely considered normal use
of the kernel, and does *not* fall under the heading of "derived work".
This exception makes it possible to include GPL headers into non GPL
code, without confusing license compliance tools.
Headers which have either explicit dual licensing or are just licensed
under a non GPL license are updated with the corresponding SPDX
identifier and the GPLv2 with syscall exception identifier. The format
is:
((GPL-2.0 WITH Linux-syscall-note) OR SPDX-ID-OF-OTHER-LICENSE)
SPDX license identifiers are a legally binding shorthand, which can be
used instead of the full boiler plate text. The update does not remove
existing license information as this has to be done on a case by case
basis and the copyright holders might have to be consulted. This will
happen in a separate step.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne. See the previous patch in this series for the
methodology of how this patch was researched.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
44 lines
1.9 KiB
C
44 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Copyright 2011 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#ifndef _ASM_TILE_CACHECTL_H
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#define _ASM_TILE_CACHECTL_H
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/*
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* Options for cacheflush system call.
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*
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* The ICACHE flush is performed on all cores currently running the
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* current process's address space. The intent is for user
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* applications to be able to modify code, invoke the system call,
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* then allow arbitrary other threads in the same address space to see
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* the newly-modified code. Passing a length of CHIP_L1I_CACHE_SIZE()
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* or more invalidates the entire icache on all cores in the address
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* spaces. (Note: currently this option invalidates the entire icache
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* regardless of the requested address and length, but we may choose
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* to honor the arguments at some point.)
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*
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* Flush and invalidation of memory can normally be performed with the
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* __insn_flush() and __insn_finv() instructions from userspace.
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* The DCACHE option to the system call allows userspace
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* to flush the entire L1+L2 data cache from the core. In this case,
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* the address and length arguments are not used. The DCACHE flush is
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* restricted to the current core, not all cores in the address space.
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*/
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#define ICACHE (1<<0) /* invalidate L1 instruction cache */
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#define DCACHE (1<<1) /* flush and invalidate data cache */
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#define BCACHE (ICACHE|DCACHE) /* flush both caches */
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#endif /* _ASM_TILE_CACHECTL_H */
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