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| /* SPDX-License-Identifier: GPL-2.0 */
| // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
| #ifndef __ASM_CSKY_CHECKSUM_H
| #define __ASM_CSKY_CHECKSUM_H
|
| #include <linux/in6.h>
| #include <asm/byteorder.h>
|
| static inline __sum16 csum_fold(__wsum csum)
| {
| u32 tmp;
|
| asm volatile(
| "mov %1, %0\n"
| "rori %0, 16\n"
| "addu %0, %1\n"
| "lsri %0, 16\n"
| : "=r"(csum), "=r"(tmp)
| : "0"(csum));
|
| return (__force __sum16) ~csum;
| }
| #define csum_fold csum_fold
|
| static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
| unsigned short len, unsigned short proto, __wsum sum)
| {
| asm volatile(
| "clrc\n"
| "addc %0, %1\n"
| "addc %0, %2\n"
| "addc %0, %3\n"
| "inct %0\n"
| : "=r"(sum)
| : "r"((__force u32)saddr), "r"((__force u32)daddr),
| #ifdef __BIG_ENDIAN
| "r"(proto + len),
| #else
| "r"((proto + len) << 8),
| #endif
| "0" ((__force unsigned long)sum)
| : "cc");
| return sum;
| }
| #define csum_tcpudp_nofold csum_tcpudp_nofold
|
| #include <asm-generic/checksum.h>
|
| #endif /* __ASM_CSKY_CHECKSUM_H */
|
|
