123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960 |
- /*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- */
- #ifndef _ASM_TILE_SPINLOCK_TYPES_H
- #define _ASM_TILE_SPINLOCK_TYPES_H
- #ifndef __LINUX_SPINLOCK_TYPES_H
- # error "please don't include this file directly"
- #endif
- #ifdef __tilegx__
- /* Low 15 bits are "next"; high 15 bits are "current". */
- typedef struct arch_spinlock {
- unsigned int lock;
- } arch_spinlock_t;
- #define __ARCH_SPIN_LOCK_UNLOCKED { 0 }
- /* High bit is "writer owns"; low 31 bits are a count of readers. */
- typedef struct arch_rwlock {
- unsigned int lock;
- } arch_rwlock_t;
- #define __ARCH_RW_LOCK_UNLOCKED { 0 }
- #else
- typedef struct arch_spinlock {
- /* Next ticket number to hand out. */
- int next_ticket;
- /* The ticket number that currently owns this lock. */
- int current_ticket;
- } arch_spinlock_t;
- #define __ARCH_SPIN_LOCK_UNLOCKED { 0, 0 }
- /*
- * Byte 0 for tns (only the low bit is used), byte 1 for ticket-lock "next",
- * byte 2 for ticket-lock "current", byte 3 for reader count.
- */
- typedef struct arch_rwlock {
- unsigned int lock;
- } arch_rwlock_t;
- #define __ARCH_RW_LOCK_UNLOCKED { 0 }
- #endif
- #endif /* _ASM_TILE_SPINLOCK_TYPES_H */
|