ia64/linux-2.6.18-xen.hg

view include/asm-v850/checksum.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 831230e53067
children
line source
1 /*
2 * include/asm-v850/checksum.h -- Checksum ops
3 *
4 * Copyright (C) 2001,2005 NEC Corporation
5 * Copyright (C) 2001,2005 Miles Bader <miles@gnu.org>
6 *
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License. See the file COPYING in the main directory of this
9 * archive for more details.
10 *
11 * Written by Miles Bader <miles@gnu.org>
12 */
14 #ifndef __V850_CHECKSUM_H__
15 #define __V850_CHECKSUM_H__
17 /*
18 * computes the checksum of a memory block at buff, length len,
19 * and adds in "sum" (32-bit)
20 *
21 * returns a 32-bit number suitable for feeding into itself
22 * or csum_tcpudp_magic
23 *
24 * this function must be called with even lengths, except
25 * for the last fragment, which may be odd
26 *
27 * it's best to have buff aligned on a 32-bit boundary
28 */
29 extern unsigned int csum_partial (const unsigned char * buff, int len,
30 unsigned int sum);
32 /*
33 * the same as csum_partial, but copies from src while it
34 * checksums
35 *
36 * here even more important to align src and dst on a 32-bit (or even
37 * better 64-bit) boundary
38 */
39 extern unsigned csum_partial_copy (const unsigned char *src,
40 unsigned char *dst, int len, unsigned sum);
43 /*
44 * the same as csum_partial_copy, but copies from user space.
45 *
46 * here even more important to align src and dst on a 32-bit (or even
47 * better 64-bit) boundary
48 */
49 extern unsigned csum_partial_copy_from_user (const unsigned char *src,
50 unsigned char *dst,
51 int len, unsigned sum,
52 int *csum_err);
54 #define csum_partial_copy_nocheck(src, dst, len, sum) \
55 csum_partial_copy ((src), (dst), (len), (sum))
57 unsigned short ip_fast_csum (unsigned char *iph, unsigned int ihl);
59 /*
60 * Fold a partial checksum
61 */
62 static inline unsigned int csum_fold (unsigned long sum)
63 {
64 unsigned int result;
65 /*
66 %0 %1
67 hsw %1, %0 H L L H
68 add %1, %0 H L H+L+C H+L
69 */
70 asm ("hsw %1, %0; add %1, %0" : "=&r" (result) : "r" (sum));
71 return (~result) >> 16;
72 }
75 /*
76 * computes the checksum of the TCP/UDP pseudo-header
77 * returns a 16-bit checksum, already complemented
78 */
79 static inline unsigned int
80 csum_tcpudp_nofold (unsigned long saddr, unsigned long daddr,
81 unsigned short len,
82 unsigned short proto, unsigned int sum)
83 {
84 int __carry;
85 __asm__ ("add %2, %0;"
86 "setf c, %1;"
87 "add %1, %0;"
88 "add %3, %0;"
89 "setf c, %1;"
90 "add %1, %0;"
91 "add %4, %0;"
92 "setf c, %1;"
93 "add %1, %0"
94 : "=&r" (sum), "=&r" (__carry)
95 : "r" (daddr), "r" (saddr),
96 "r" (ntohs (len) + (proto << 8)),
97 "0" (sum));
98 return sum;
99 }
101 static inline unsigned short int
102 csum_tcpudp_magic (unsigned long saddr, unsigned long daddr,
103 unsigned short len,
104 unsigned short proto, unsigned int sum)
105 {
106 return csum_fold (csum_tcpudp_nofold (saddr, daddr, len, proto, sum));
107 }
109 /*
110 * this routine is used for miscellaneous IP-like checksums, mainly
111 * in icmp.c
112 */
113 extern unsigned short ip_compute_csum (const unsigned char * buff, int len);
116 #endif /* __V850_CHECKSUM_H__ */