diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/checksum.h | 6 | ||||
| -rw-r--r-- | arch/powerpc/lib/checksum_32.S | 33 | ||||
| -rw-r--r-- | arch/powerpc/lib/checksum_64.S | 28 |
3 files changed, 67 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/checksum.h b/arch/powerpc/include/asm/checksum.h index 54065caa40b3..a78a57e5058d 100644 --- a/arch/powerpc/include/asm/checksum.h +++ b/arch/powerpc/include/asm/checksum.h @@ -13,6 +13,7 @@ #include <asm-generic/checksum.h> #else #include <linux/bitops.h> +#include <linux/in6.h> /* * Computes the checksum of a memory block at src, length len, * and adds in "sum" (32-bit), while copying the block to dst. @@ -211,6 +212,11 @@ static inline __sum16 ip_compute_csum(const void *buff, int len) return csum_fold(csum_partial(buff, len, 0)); } +#define _HAVE_ARCH_IPV6_CSUM +__sum16 csum_ipv6_magic(const struct in6_addr *saddr, + const struct in6_addr *daddr, + __u32 len, __u8 proto, __wsum sum); + #endif #endif /* __KERNEL__ */ #endif diff --git a/arch/powerpc/lib/checksum_32.S b/arch/powerpc/lib/checksum_32.S index 422d66e938e3..aa224069f93a 100644 --- a/arch/powerpc/lib/checksum_32.S +++ b/arch/powerpc/lib/checksum_32.S @@ -302,3 +302,36 @@ dst_error: EX_TABLE(51b, dst_error); EXPORT_SYMBOL(csum_partial_copy_generic) + +/* + * __sum16 csum_ipv6_magic(const struct in6_addr *saddr, + * const struct in6_addr *daddr, + * __u32 len, __u8 proto, __wsum sum) + */ + +_GLOBAL(csum_ipv6_magic) + lwz r8, 0(r3) + lwz r9, 4(r3) + addc r0, r7, r8 + lwz r10, 8(r3) + adde r0, r0, r9 + lwz r11, 12(r3) + adde r0, r0, r10 + lwz r8, 0(r4) + adde r0, r0, r11 + lwz r9, 4(r4) + adde r0, r0, r8 + lwz r10, 8(r4) + adde r0, r0, r9 + lwz r11, 12(r4) + adde r0, r0, r10 + add r5, r5, r6 /* assumption: len + proto doesn't carry */ + adde r0, r0, r11 + adde r0, r0, r5 + addze r0, r0 + rotlwi r3, r0, 16 + add r3, r0, r3 + not r3, r3 + rlwinm r3, r3, 16, 16, 31 + blr +EXPORT_SYMBOL(csum_ipv6_magic) diff --git a/arch/powerpc/lib/checksum_64.S b/arch/powerpc/lib/checksum_64.S index d7f1a966136e..886ed94b9c13 100644 --- a/arch/powerpc/lib/checksum_64.S +++ b/arch/powerpc/lib/checksum_64.S @@ -429,3 +429,31 @@ dstnr; stb r6,0(r4) stw r6,0(r8) blr EXPORT_SYMBOL(csum_partial_copy_generic) + +/* + * __sum16 csum_ipv6_magic(const struct in6_addr *saddr, + * const struct in6_addr *daddr, + * __u32 len, __u8 proto, __wsum sum) + */ + +_GLOBAL(csum_ipv6_magic) + ld r8, 0(r3) + ld r9, 8(r3) + add r5, r5, r6 + addc r0, r8, r9 + ld r10, 0(r4) + ld r11, 8(r4) + adde r0, r0, r10 + add r5, r5, r7 + adde r0, r0, r11 + adde r0, r0, r5 + addze r0, r0 + rotldi r3, r0, 32 /* fold two 32 bit halves together */ + add r3, r0, r3 + srdi r0, r3, 32 + rotlwi r3, r0, 16 /* fold two 16 bit halves together */ + add r3, r0, r3 + not r3, r3 + rlwinm r3, r3, 16, 16, 31 + blr +EXPORT_SYMBOL(csum_ipv6_magic) |