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
27static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
28{
29 unsigned int sum;
30 unsigned long t0, t1, t2;
31
32 __asm__ __volatile__ (
33" ldws,ma 4(%1), %0\n"
34" addib,<= -4, %2, 2f\n"
35"\n"
36" ldws 4(%1), %4\n"
37" ldws 8(%1), %5\n"
38" add %0, %4, %0\n"
39" ldws,ma 12(%1), %3\n"
40" addc %0, %5, %0\n"
41" addc %0, %3, %0\n"
42"1: ldws,ma 4(%1), %3\n"
43" addib,< 0, %2, 1b\n"
44" addc %0, %3, %0\n"
45"\n"
46" extru %0, 31, 16, %4\n"
47" extru %0, 15, 16, %5\n"
48" addc %4, %5, %0\n"
49" extru %0, 15, 16, %5\n"
50" add %0, %5, %0\n"
51" subi -1, %0, %0\n"
52"2:\n"
53 : "=r" (sum), "=r" (iph), "=r" (ihl), "=r" (t0), "=r" (t1), "=r" (t2)
54 : "1" (iph), "2" (ihl)
55 : "memory");
56
57 return (__force __sum16)sum;
58}
59
60
61
62
63static inline __sum16 csum_fold(__wsum csum)
64{
65 u32 sum = (__force u32)csum;
66
67
68
69
70 sum += (sum << 16) + (sum >> 16);
71 return (__force __sum16)(~sum >> 16);
72}
73
74static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
75 __u32 len, __u8 proto,
76 __wsum sum)
77{
78 __asm__(
79 " add %1, %0, %0\n"
80 " addc %2, %0, %0\n"
81 " addc %3, %0, %0\n"
82 " addc %%r0, %0, %0\n"
83 : "=r" (sum)
84 : "r" (daddr), "r"(saddr), "r"(proto+len), "0"(sum));
85 return sum;
86}
87
88
89
90
91
92static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
93 __u32 len, __u8 proto,
94 __wsum sum)
95{
96 return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
97}
98
99
100
101
102
103static inline __sum16 ip_compute_csum(const void *buf, int len)
104{
105 return csum_fold (csum_partial(buf, len, 0));
106}
107
108
109#define _HAVE_ARCH_IPV6_CSUM
110static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
111 const struct in6_addr *daddr,
112 __u32 len, __u8 proto,
113 __wsum sum)
114{
115 unsigned long t0, t1, t2, t3;
116
117 len += proto;
118
119 __asm__ __volatile__ (
120
121#if BITS_PER_LONG > 32
122
123
124
125
126
127
128
129" ldd,ma 8(%1), %4\n"
130" ldd,ma 8(%2), %5\n"
131" add %4, %0, %0\n"
132" ldd,ma 8(%1), %6\n"
133" ldd,ma 8(%2), %7\n"
134" add,dc %5, %0, %0\n"
135" add,dc %6, %0, %0\n"
136" add,dc %7, %0, %0\n"
137" add,dc %3, %0, %0\n"
138" extrd,u %0, 31, 32, %4\n"
139" depdi 0, 31, 32, %0\n"
140" add %4, %0, %0\n"
141" addc 0, %0, %0\n"
142
143#else
144
145
146
147
148
149
150" ldw,ma 4(%1), %4\n"
151" ldw,ma 4(%2), %5\n"
152" add %4, %0, %0\n"
153" ldw,ma 4(%1), %6\n"
154" addc %5, %0, %0\n"
155" ldw,ma 4(%2), %7\n"
156" addc %6, %0, %0\n"
157" ldw,ma 4(%1), %4\n"
158" addc %7, %0, %0\n"
159" ldw,ma 4(%2), %5\n"
160" addc %4, %0, %0\n"
161" ldw,ma 4(%1), %6\n"
162" addc %5, %0, %0\n"
163" ldw,ma 4(%2), %7\n"
164" addc %6, %0, %0\n"
165" addc %7, %0, %0\n"
166" addc %3, %0, %0\n"
167
168#endif
169 : "=r" (sum), "=r" (saddr), "=r" (daddr), "=r" (len),
170 "=r" (t0), "=r" (t1), "=r" (t2), "=r" (t3)
171 : "0" (sum), "1" (saddr), "2" (daddr), "3" (len)
172 : "memory");
173 return csum_fold(sum);
174}
175
176#endif
177
178