ia64/xen-unstable

view xen/include/asm-ia64/linux-xen/asm/cache.h @ 9770:ced37bea0647

[IA64] FPH enabling + cleanup

Move contents of switch_to macro from xensystem.h to context_switch function.
Initialize FPU on all processors. FPH is always enabled in Xen.
Speed up context-switch (a little bit!) by not enabling/disabling FPH.
Cleanup (unused function/variablesi/fields, debug printf...)
vmx_ia64_switch_to removed (was unused).

Signed-off-by: Tristan Gingold <tristan.gingold@bull.net>
author awilliam@xenbuild.aw
date Tue Apr 25 22:35:41 2006 -0600 (2006-04-25)
parents 0ee00faf332d
children 6b821e310597
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 #endif /* _ASM_IA64_CACHE_H */