ia64/xen-unstable

view xen/include/asm-ia64/linux-xen/asm/cache.h @ 11013:6b821e310597

[XEN] Implement proper __read_mostly memory arrangemengt for x86.
Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Tue Aug 08 15:14:43 2006 +0100 (2006-08-08)
parents 0ee00faf332d
children 61504e80defa
line source
1 #ifndef _ASM_IA64_CACHE_H
2 #define _ASM_IA64_CACHE_H
4 #include <linux/config.h>
6 /*
7 * Copyright (C) 1998-2000 Hewlett-Packard Co
8 * David Mosberger-Tang <davidm@hpl.hp.com>
9 */
11 /* Bytes per L1 (data) cache line. */
12 #define L1_CACHE_SHIFT CONFIG_IA64_L1_CACHE_SHIFT
13 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
15 #define L1_CACHE_SHIFT_MAX 7 /* largest L1 which this arch supports */
17 #ifdef XEN
18 # define SMP_CACHE_SHIFT L1_CACHE_SHIFT
19 # define SMP_CACHE_BYTES L1_CACHE_BYTES
20 #else
21 #ifdef CONFIG_SMP
22 # define SMP_CACHE_SHIFT L1_CACHE_SHIFT
23 # define SMP_CACHE_BYTES L1_CACHE_BYTES
24 #else
25 /*
26 * The "aligned" directive can only _increase_ alignment, so this is
27 * safe and provides an easy way to avoid wasting space on a
28 * uni-processor:
29 */
30 # define SMP_CACHE_SHIFT 3
31 # define SMP_CACHE_BYTES (1 << 3)
32 #endif
33 #endif
35 #define __read_mostly
37 #endif /* _ASM_IA64_CACHE_H */