df842f79f0
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michael Kerrisk <mtk.manpages@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dave Jones <davej@redhat.com>
42 lines
1.9 KiB
C
42 lines
1.9 KiB
C
/*
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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(), __insn_inv(), and __insn_finv() instructions from
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* userspace. 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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