| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #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 */ |
