31 lines
658 B
C
31 lines
658 B
C
|
/*
|
||
|
|
* Copied from the kernel sources:
|
||
|
|
*
|
||
|
|
* Copyright IBM Corp. 1999, 2009
|
||
|
|
*
|
||
|
|
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __TOOLS_LINUX_ASM_BARRIER_H
|
||
|
|
#define __TOOLS_LINUX_ASM_BARRIER_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Force strict CPU ordering.
|
||
|
|
* And yes, this is required on UP too when we're talking
|
||
|
|
* to devices.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
|
||
|
|
/* Fast-BCR without checkpoint synchronization */
|
||
|
|
#define __ASM_BARRIER "bcr 14,0\n"
|
||
|
|
#else
|
||
|
|
#define __ASM_BARRIER "bcr 15,0\n"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define mb() do { asm volatile(__ASM_BARRIER : : : "memory"); } while (0)
|
||
|
|
|
||
|
|
#define rmb() mb()
|
||
|
|
#define wmb() mb()
|
||
|
|
|
||
|
|
#endif /* __TOOLS_LIB_ASM_BARRIER_H */
|