tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copied from the kernel sources:
3 *
4 * Copyright IBM Corp. 1999, 2009
5 *
6 * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
7 */
8
9#ifndef __TOOLS_LINUX_ASM_BARRIER_H
10#define __TOOLS_LINUX_ASM_BARRIER_H
11
12/*
13 * Force strict CPU ordering.
14 * And yes, this is required on UP too when we're talking
15 * to devices.
16 */
17
18#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
19/* Fast-BCR without checkpoint synchronization */
20#define __ASM_BARRIER "bcr 14,0\n"
21#else
22#define __ASM_BARRIER "bcr 15,0\n"
23#endif
24
25#define mb() do { asm volatile(__ASM_BARRIER : : : "memory"); } while (0)
26
27#define rmb() mb()
28#define wmb() mb()
29
30#endif /* __TOOLS_LIB_ASM_BARRIER_H */