blob: f85141266b92c5b2c278d64b309a6b1c2b62533a (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
/*
* 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 */
|
