1
2#ifndef _PARISC_CHECKSUM_H
3#define _PARISC_CHECKSUM_H
4
5#include <linux/in6.h>
6
7
8
9
10
11
12
13
14
15
16
17
18
19extern __wsum csum_partial(const void *, int, __wsum);
20
21
22
23
24
25
26
27extern __wsum csum_partial_copy_nocheck(const void *, void *, int, __wsum);
28
29
30
31
32
33extern __wsum csum_partial_copy_from_user(const void __user *src,
34 void *dst, int len, __wsum sum, int *errp);
35
36
37
38
39
40
41
42static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
43{
44 unsigned int sum;
45 unsigned long t0, t1, t2;
46
47 __asm__ __volatile__ (
48" ldws,ma 4(%1), %0\n"
49" addib,<= -4, %2, 2f\n"
50"\n"
51" ldws 4(%1), %4\n"
52" ldws 8(%1), %5\n"
53" add %0, %4, %0\n"
54" ldws,ma 12(%1), %3\n"
55" addc %0, %5, %0\n"
56" addc %0, %3, %0\n"
57"1: ldws,ma 4(%1), %3\n"
58" addib,< 0, %2, 1b\n"
59" addc %0, %3, %0\n"
60"\n"
61" extru %0, 31, 16, %4\n"
62" extru %0, 15, 16, %5\n"
63" addc %4, %5, %0\n"
64" extru %0, 15, 16, %5\n"
65" add %0, %5, %0\n"
66" subi -1, %0, %0\n"
67"2:\n"
68 : "=r" (sum), "=r" (iph), "=r" (ihl), "=r" (t0), "=r" (t1), "=r" (t2)
69 : "1" (iph), "2" (ihl)
70 : "memory");
71
72 return (__force __sum16)sum;
73}
74
75
76
77
78static inline __sum16 csum_fold(__wsum csum)
79{
80 u32 sum = (__force u32)csum;
81
82
83
84
85 sum += (sum << 16) + (sum >> 16);
86 return (__force __sum16)(~sum >> 16);
87}
88
89static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
90 __u32 len, __u8 proto,
91 __wsum sum)
92{
93 __asm__(
94 " add %1, %0, %0\n"
95 " addc %2, %0, %0\n"
96 " addc %3, %0, %0\n"
97 " addc %%r0, %0, %0\n"
98 : "=r" (sum)
99 : "r" (daddr), "r"(saddr), "r"(proto+len), "0"(sum));
100 return sum;
101}
102
103
104
105
106
107static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
108 __u32 len, __u8 proto,
109 __wsum sum)
110{
111 return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
112}
113
114
115
116
117
118static inline __sum16 ip_compute_csum(const void *buf, int len)
119{
120 return csum_fold (csum_partial(buf, len, 0));
121}
122
123
124#define _HAVE_ARCH_IPV6_CSUM
125static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
126 const struct in6_addr *daddr,
127 __u32 len, __u8 proto,
128 __wsum sum)
129{
130 unsigned long t0, t1, t2, t3;
131
132 len += proto;
133
134 __asm__ __volatile__ (
135
136#if BITS_PER_LONG > 32
137
138
139
140
141
142
143
144" ldd,ma 8(%1), %4\n"
145" ldd,ma 8(%2), %5\n"
146" add %4, %0, %0\n"
147" ldd,ma 8(%1), %6\n"
148" ldd,ma 8(%2), %7\n"
149" add,dc %5, %0, %0\n"
150" add,dc %6, %0, %0\n"
151" add,dc %7, %0, %0\n"
152" add,dc %3, %0, %0\n"
153" extrd,u %0, 31, 32, %4\n"
154" depdi 0, 31, 32, %0\n"
155" add %4, %0, %0\n"
156" addc 0, %0, %0\n"
157
158#else
159
160
161
162
163
164
165" ldw,ma 4(%1), %4\n"
166" ldw,ma 4(%2), %5\n"
167" add %4, %0, %0\n"
168" ldw,ma 4(%1), %6\n"
169" addc %5, %0, %0\n"
170" ldw,ma 4(%2), %7\n"
171" addc %6, %0, %0\n"
172" ldw,ma 4(%1), %4\n"
173" addc %7, %0, %0\n"
174" ldw,ma 4(%2), %5\n"
175" addc %4, %0, %0\n"
176" ldw,ma 4(%1), %6\n"
177" addc %5, %0, %0\n"
178" ldw,ma 4(%2), %7\n"
179" addc %6, %0, %0\n"
180" addc %7, %0, %0\n"
181" addc %3, %0, %0\n"
182
183#endif
184 : "=r" (sum), "=r" (saddr), "=r" (daddr), "=r" (len),
185 "=r" (t0), "=r" (t1), "=r" (t2), "=r" (t3)
186 : "0" (sum), "1" (saddr), "2" (daddr), "3" (len)
187 : "memory");
188 return csum_fold(sum);
189}
190
191
192
193
194#define HAVE_CSUM_COPY_USER
195static __inline__ __wsum csum_and_copy_to_user(const void *src,
196 void __user *dst,
197 int len, __wsum sum,
198 int *err_ptr)
199{
200
201 sum = csum_partial(src, len, sum);
202
203 if (copy_to_user(dst, src, len)) {
204 *err_ptr = -EFAULT;
205 return (__force __wsum)-1;
206 }
207
208 return sum;
209}
210
211#endif
212
213