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-rw-r--r--include/asm-ia64/sn/fetchop.h85
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diff --git a/include/asm-ia64/sn/fetchop.h b/include/asm-ia64/sn/fetchop.h
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--- a/include/asm-ia64/sn/fetchop.h
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1/*
2 *
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
5 * for more details.
6 *
7 * Copyright (c) 2001-2004 Silicon Graphics, Inc. All rights reserved.
8 */
9
10#ifndef _ASM_IA64_SN_FETCHOP_H
11#define _ASM_IA64_SN_FETCHOP_H
12
13#include <linux/config.h>
14
15#define FETCHOP_BASENAME "sgi_fetchop"
16#define FETCHOP_FULLNAME "/dev/sgi_fetchop"
17
18
19
20#define FETCHOP_VAR_SIZE 64 /* 64 byte per fetchop variable */
21
22#define FETCHOP_LOAD 0
23#define FETCHOP_INCREMENT 8
24#define FETCHOP_DECREMENT 16
25#define FETCHOP_CLEAR 24
26
27#define FETCHOP_STORE 0
28#define FETCHOP_AND 24
29#define FETCHOP_OR 32
30
31#define FETCHOP_CLEAR_CACHE 56
32
33#define FETCHOP_LOAD_OP(addr, op) ( \
34 *(volatile long *)((char*) (addr) + (op)))
35
36#define FETCHOP_STORE_OP(addr, op, x) ( \
37 *(volatile long *)((char*) (addr) + (op)) = (long) (x))
38
39#ifdef __KERNEL__
40
41/*
42 * Convert a region 6 (kaddr) address to the address of the fetchop variable
43 */
44#define FETCHOP_KADDR_TO_MSPEC_ADDR(kaddr) TO_MSPEC(kaddr)
45
46
47/*
48 * Each Atomic Memory Operation (AMO formerly known as fetchop)
49 * variable is 64 bytes long. The first 8 bytes are used. The
50 * remaining 56 bytes are unaddressable due to the operation taking
51 * that portion of the address.
52 *
53 * NOTE: The AMO_t _MUST_ be placed in either the first or second half
54 * of the cache line. The cache line _MUST NOT_ be used for anything
55 * other than additional AMO_t entries. This is because there are two
56 * addresses which reference the same physical cache line. One will
57 * be a cached entry with the memory type bits all set. This address
58 * may be loaded into processor cache. The AMO_t will be referenced
59 * uncached via the memory special memory type. If any portion of the
60 * cached cache-line is modified, when that line is flushed, it will
61 * overwrite the uncached value in physical memory and lead to
62 * inconsistency.
63 */
64typedef struct {
65 u64 variable;
66 u64 unused[7];
67} AMO_t;
68
69
70/*
71 * The following APIs are externalized to the kernel to allocate/free pages of
72 * fetchop variables.
73 * fetchop_kalloc_page - Allocate/initialize 1 fetchop page on the
74 * specified cnode.
75 * fetchop_kfree_page - Free a previously allocated fetchop page
76 */
77
78unsigned long fetchop_kalloc_page(int nid);
79void fetchop_kfree_page(unsigned long maddr);
80
81
82#endif /* __KERNEL__ */
83
84#endif /* _ASM_IA64_SN_FETCHOP_H */
85