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-rw-r--r--include/asm-sparc/checksum_64.h167
1 files changed, 0 insertions, 167 deletions
diff --git a/include/asm-sparc/checksum_64.h b/include/asm-sparc/checksum_64.h
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index 019b9615e43c..000000000000
--- a/include/asm-sparc/checksum_64.h
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@@ -1,167 +0,0 @@
1#ifndef __SPARC64_CHECKSUM_H
2#define __SPARC64_CHECKSUM_H
3
4/* checksum.h: IP/UDP/TCP checksum routines on the V9.
5 *
6 * Copyright(C) 1995 Linus Torvalds
7 * Copyright(C) 1995 Miguel de Icaza
8 * Copyright(C) 1996 David S. Miller
9 * Copyright(C) 1996 Eddie C. Dost
10 * Copyright(C) 1997 Jakub Jelinek
11 *
12 * derived from:
13 * Alpha checksum c-code
14 * ix86 inline assembly
15 * RFC1071 Computing the Internet Checksum
16 */
17
18#include <linux/in6.h>
19#include <asm/uaccess.h>
20
21/* computes the checksum of a memory block at buff, length len,
22 * and adds in "sum" (32-bit)
23 *
24 * returns a 32-bit number suitable for feeding into itself
25 * or csum_tcpudp_magic
26 *
27 * this function must be called with even lengths, except
28 * for the last fragment, which may be odd
29 *
30 * it's best to have buff aligned on a 32-bit boundary
31 */
32extern __wsum csum_partial(const void * buff, int len, __wsum sum);
33
34/* the same as csum_partial, but copies from user space while it
35 * checksums
36 *
37 * here even more important to align src and dst on a 32-bit (or even
38 * better 64-bit) boundary
39 */
40extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
41 int len, __wsum sum);
42
43extern long __csum_partial_copy_from_user(const void __user *src,
44 void *dst, int len,
45 __wsum sum);
46
47static inline __wsum
48csum_partial_copy_from_user(const void __user *src,
49 void *dst, int len,
50 __wsum sum, int *err)
51{
52 long ret = __csum_partial_copy_from_user(src, dst, len, sum);
53 if (ret < 0)
54 *err = -EFAULT;
55 return (__force __wsum) ret;
56}
57
58/*
59 * Copy and checksum to user
60 */
61#define HAVE_CSUM_COPY_USER
62extern long __csum_partial_copy_to_user(const void *src,
63 void __user *dst, int len,
64 __wsum sum);
65
66static inline __wsum
67csum_and_copy_to_user(const void *src,
68 void __user *dst, int len,
69 __wsum sum, int *err)
70{
71 long ret = __csum_partial_copy_to_user(src, dst, len, sum);
72 if (ret < 0)
73 *err = -EFAULT;
74 return (__force __wsum) ret;
75}
76
77/* ihl is always 5 or greater, almost always is 5, and iph is word aligned
78 * the majority of the time.
79 */
80extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
81
82/* Fold a partial checksum without adding pseudo headers. */
83static inline __sum16 csum_fold(__wsum sum)
84{
85 unsigned int tmp;
86
87 __asm__ __volatile__(
88" addcc %0, %1, %1\n"
89" srl %1, 16, %1\n"
90" addc %1, %%g0, %1\n"
91" xnor %%g0, %1, %0\n"
92 : "=&r" (sum), "=r" (tmp)
93 : "0" (sum), "1" ((__force u32)sum<<16)
94 : "cc");
95 return (__force __sum16)sum;
96}
97
98static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
99 unsigned int len,
100 unsigned short proto,
101 __wsum sum)
102{
103 __asm__ __volatile__(
104" addcc %1, %0, %0\n"
105" addccc %2, %0, %0\n"
106" addccc %3, %0, %0\n"
107" addc %0, %%g0, %0\n"
108 : "=r" (sum), "=r" (saddr)
109 : "r" (daddr), "r" (proto + len), "0" (sum), "1" (saddr)
110 : "cc");
111 return sum;
112}
113
114/*
115 * computes the checksum of the TCP/UDP pseudo-header
116 * returns a 16-bit checksum, already complemented
117 */
118static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
119 unsigned short len,
120 unsigned short proto,
121 __wsum sum)
122{
123 return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
124}
125
126#define _HAVE_ARCH_IPV6_CSUM
127
128static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
129 const struct in6_addr *daddr,
130 __u32 len, unsigned short proto,
131 __wsum sum)
132{
133 __asm__ __volatile__ (
134" addcc %3, %4, %%g7\n"
135" addccc %5, %%g7, %%g7\n"
136" lduw [%2 + 0x0c], %%g2\n"
137" lduw [%2 + 0x08], %%g3\n"
138" addccc %%g2, %%g7, %%g7\n"
139" lduw [%2 + 0x04], %%g2\n"
140" addccc %%g3, %%g7, %%g7\n"
141" lduw [%2 + 0x00], %%g3\n"
142" addccc %%g2, %%g7, %%g7\n"
143" lduw [%1 + 0x0c], %%g2\n"
144" addccc %%g3, %%g7, %%g7\n"
145" lduw [%1 + 0x08], %%g3\n"
146" addccc %%g2, %%g7, %%g7\n"
147" lduw [%1 + 0x04], %%g2\n"
148" addccc %%g3, %%g7, %%g7\n"
149" lduw [%1 + 0x00], %%g3\n"
150" addccc %%g2, %%g7, %%g7\n"
151" addccc %%g3, %%g7, %0\n"
152" addc 0, %0, %0\n"
153 : "=&r" (sum)
154 : "r" (saddr), "r" (daddr), "r"(htonl(len)),
155 "r"(htonl(proto)), "r"(sum)
156 : "g2", "g3", "g7", "cc");
157
158 return csum_fold(sum);
159}
160
161/* this routine is used for miscellaneous IP-like checksums, mainly in icmp.c */
162static inline __sum16 ip_compute_csum(const void *buff, int len)
163{
164 return csum_fold(csum_partial(buff, len, 0));
165}
166
167#endif /* !(__SPARC64_CHECKSUM_H) */
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