xref: /openbmc/linux/arch/csky/include/asm/checksum.h (revision 6607aa6f)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef __ASM_CSKY_CHECKSUM_H
4 #define __ASM_CSKY_CHECKSUM_H
5 
6 #include <linux/in6.h>
7 #include <asm/byteorder.h>
8 
csum_fold(__wsum csum)9 static inline __sum16 csum_fold(__wsum csum)
10 {
11 	u32 tmp;
12 
13 	asm volatile(
14 	"mov	%1, %0\n"
15 	"rori	%0, 16\n"
16 	"addu	%0, %1\n"
17 	"lsri	%0, 16\n"
18 	: "=r"(csum), "=r"(tmp)
19 	: "0"(csum));
20 
21 	return (__force __sum16) ~csum;
22 }
23 #define csum_fold csum_fold
24 
csum_tcpudp_nofold(__be32 saddr,__be32 daddr,unsigned short len,unsigned short proto,__wsum sum)25 static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
26 		unsigned short len, unsigned short proto, __wsum sum)
27 {
28 	asm volatile(
29 	"clrc\n"
30 	"addc    %0, %1\n"
31 	"addc    %0, %2\n"
32 	"addc    %0, %3\n"
33 	"inct    %0\n"
34 	: "=r"(sum)
35 	: "r"((__force u32)saddr), "r"((__force u32)daddr),
36 #ifdef __BIG_ENDIAN
37 	"r"(proto + len),
38 #else
39 	"r"((proto + len) << 8),
40 #endif
41 	"0" ((__force unsigned long)sum)
42 	: "cc");
43 	return sum;
44 }
45 #define csum_tcpudp_nofold csum_tcpudp_nofold
46 
47 #include <asm-generic/checksum.h>
48 
49 #endif /* __ASM_CSKY_CHECKSUM_H */
50