ia64/linux-2.6.18-xen.hg

view include/xen/xencomm.h @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 05c22f282023
children
line source
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15 *
16 * Copyright (C) IBM Corp. 2006
17 *
18 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
19 * Jerone Young <jyoung5@us.ibm.com>
20 */
22 #ifndef _LINUX_XENCOMM_H_
23 #define _LINUX_XENCOMM_H_
25 #include <xen/interface/xencomm.h>
27 #define XENCOMM_MINI_ADDRS 3
28 struct xencomm_mini {
29 struct xencomm_desc _desc;
30 uint64_t address[XENCOMM_MINI_ADDRS];
31 };
33 /* To avoid additionnal virt to phys conversion, an opaque structure is
34 presented. */
35 struct xencomm_handle;
37 extern void xencomm_free(struct xencomm_handle *desc);
38 extern struct xencomm_handle *xencomm_map(void *ptr, unsigned long bytes);
39 extern struct xencomm_handle *__xencomm_map_no_alloc(void *ptr,
40 unsigned long bytes, struct xencomm_mini *xc_area);
42 #if 0
43 #define XENCOMM_MINI_ALIGNED(xc_desc, n) \
44 struct xencomm_mini xc_desc ## _base[(n)] \
45 __attribute__((__aligned__(sizeof(struct xencomm_mini)))); \
46 struct xencomm_mini* xc_desc = &xc_desc ## _base[0];
47 #else
48 /*
49 * gcc bug workaround:
50 * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16660
51 * gcc doesn't handle properly stack variable with
52 * __attribute__((__align__(sizeof(struct xencomm_mini))))
53 */
54 #define XENCOMM_MINI_ALIGNED(xc_desc, n) \
55 unsigned char xc_desc ## _base[((n) + 1 ) * \
56 sizeof(struct xencomm_mini)]; \
57 struct xencomm_mini *xc_desc = (struct xencomm_mini*) \
58 ((unsigned long)xc_desc ## _base + \
59 (sizeof(struct xencomm_mini) - \
60 ((unsigned long)xc_desc ## _base) % \
61 sizeof(struct xencomm_mini)));
62 #endif
63 #define xencomm_map_no_alloc(ptr, bytes) \
64 ({XENCOMM_MINI_ALIGNED(xc_desc, 1); \
65 __xencomm_map_no_alloc(ptr, bytes, xc_desc);})
67 /* provided by architecture code: */
68 extern unsigned long xencomm_vtop(unsigned long vaddr);
70 static inline void *xencomm_pa(void *ptr)
71 {
72 return (void *)xencomm_vtop((unsigned long)ptr);
73 }
75 #define xen_guest_handle(hnd) ((hnd).p)
77 #endif /* _LINUX_XENCOMM_H_ */