61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/*
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* Copyright 2010 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_SPINLOCK_TYPES_H
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#define _ASM_TILE_SPINLOCK_TYPES_H
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#ifndef __LINUX_SPINLOCK_TYPES_H
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# error "please don't include this file directly"
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#endif
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#ifdef __tilegx__
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/* Low 15 bits are "next"; high 15 bits are "current". */
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typedef struct arch_spinlock {
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unsigned int lock;
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} arch_spinlock_t;
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#define __ARCH_SPIN_LOCK_UNLOCKED { 0 }
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/* High bit is "writer owns"; low 31 bits are a count of readers. */
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typedef struct arch_rwlock {
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unsigned int lock;
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} arch_rwlock_t;
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#define __ARCH_RW_LOCK_UNLOCKED { 0 }
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#else
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typedef struct arch_spinlock {
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/* Next ticket number to hand out. */
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int next_ticket;
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/* The ticket number that currently owns this lock. */
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int current_ticket;
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} arch_spinlock_t;
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#define __ARCH_SPIN_LOCK_UNLOCKED { 0, 0 }
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/*
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* Byte 0 for tns (only the low bit is used), byte 1 for ticket-lock "next",
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* byte 2 for ticket-lock "current", byte 3 for reader count.
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*/
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typedef struct arch_rwlock {
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unsigned int lock;
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} arch_rwlock_t;
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#define __ARCH_RW_LOCK_UNLOCKED { 0 }
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#endif
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#endif /* _ASM_TILE_SPINLOCK_TYPES_H */
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