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867e359b CM |
1 | /* |
2 | * Copyright 2010 Tilera Corporation. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation, version 2. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
11 | * NON INFRINGEMENT. See the GNU General Public License for | |
12 | * more details. | |
13 | */ | |
14 | ||
15 | #ifndef _ASM_TILE_SPINLOCK_TYPES_H | |
16 | #define _ASM_TILE_SPINLOCK_TYPES_H | |
17 | ||
18 | #ifndef __LINUX_SPINLOCK_TYPES_H | |
19 | # error "please don't include this file directly" | |
20 | #endif | |
21 | ||
22 | #ifdef __tilegx__ | |
23 | ||
24 | /* Low 15 bits are "next"; high 15 bits are "current". */ | |
25 | typedef struct arch_spinlock { | |
26 | unsigned int lock; | |
27 | } arch_spinlock_t; | |
28 | ||
29 | #define __ARCH_SPIN_LOCK_UNLOCKED { 0 } | |
30 | ||
31 | /* High bit is "writer owns"; low 31 bits are a count of readers. */ | |
32 | typedef struct arch_rwlock { | |
33 | unsigned int lock; | |
34 | } arch_rwlock_t; | |
35 | ||
36 | #define __ARCH_RW_LOCK_UNLOCKED { 0 } | |
37 | ||
38 | #else | |
39 | ||
40 | typedef struct arch_spinlock { | |
41 | /* Next ticket number to hand out. */ | |
42 | int next_ticket; | |
43 | /* The ticket number that currently owns this lock. */ | |
44 | int current_ticket; | |
45 | } arch_spinlock_t; | |
46 | ||
47 | #define __ARCH_SPIN_LOCK_UNLOCKED { 0, 0 } | |
48 | ||
49 | /* | |
50 | * Byte 0 for tns (only the low bit is used), byte 1 for ticket-lock "next", | |
51 | * byte 2 for ticket-lock "current", byte 3 for reader count. | |
52 | */ | |
53 | typedef struct arch_rwlock { | |
54 | unsigned int lock; | |
55 | } arch_rwlock_t; | |
56 | ||
57 | #define __ARCH_RW_LOCK_UNLOCKED { 0 } | |
58 | ||
59 | #endif | |
60 | #endif /* _ASM_TILE_SPINLOCK_TYPES_H */ |