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7f30491ccd
After moving the the include files there were a few clean-ups: 1) Some files used #include <asm-ia64/xyz.h>, changed to <asm/xyz.h> 2) Some comments alerted maintainers to look at various header files to make matching updates if certain code were to be changed. Updated these comments to use the new include paths. 3) Some header files mentioned their own names in initial comments. Just deleted these self references. Signed-off-by: Tony Luck <tony.luck@intel.com>
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/*
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 2001-2008 Silicon Graphics, Inc. All rights reserved.
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*/
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#ifndef _ASM_IA64_SN_MSPEC_H
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#define _ASM_IA64_SN_MSPEC_H
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#define FETCHOP_VAR_SIZE 64 /* 64 byte per fetchop variable */
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#define FETCHOP_LOAD 0
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#define FETCHOP_INCREMENT 8
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#define FETCHOP_DECREMENT 16
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#define FETCHOP_CLEAR 24
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#define FETCHOP_STORE 0
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#define FETCHOP_AND 24
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#define FETCHOP_OR 32
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#define FETCHOP_CLEAR_CACHE 56
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#define FETCHOP_LOAD_OP(addr, op) ( \
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*(volatile long *)((char*) (addr) + (op)))
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#define FETCHOP_STORE_OP(addr, op, x) ( \
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*(volatile long *)((char*) (addr) + (op)) = (long) (x))
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#ifdef __KERNEL__
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/*
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* Each Atomic Memory Operation (amo, formerly known as fetchop)
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* variable is 64 bytes long. The first 8 bytes are used. The
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* remaining 56 bytes are unaddressable due to the operation taking
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* that portion of the address.
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*
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* NOTE: The amo structure _MUST_ be placed in either the first or second
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* half of the cache line. The cache line _MUST NOT_ be used for anything
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* other than additional amo entries. This is because there are two
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* addresses which reference the same physical cache line. One will
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* be a cached entry with the memory type bits all set. This address
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* may be loaded into processor cache. The amo will be referenced
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* uncached via the memory special memory type. If any portion of the
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* cached cache-line is modified, when that line is flushed, it will
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* overwrite the uncached value in physical memory and lead to
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* inconsistency.
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*/
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struct amo {
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u64 variable;
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u64 unused[7];
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};
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#endif /* __KERNEL__ */
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#endif /* _ASM_IA64_SN_MSPEC_H */
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