diff options
| -rw-r--r-- | include/asm-powerpc/checksum.h (renamed from include/asm-ppc64/checksum.h) | 47 | ||||
| -rw-r--r-- | include/asm-ppc/checksum.h | 107 |
2 files changed, 36 insertions, 118 deletions
diff --git a/include/asm-ppc64/checksum.h b/include/asm-powerpc/checksum.h index d22d4469de4..d8354d8a49c 100644 --- a/include/asm-ppc64/checksum.h +++ b/include/asm-powerpc/checksum.h @@ -1,5 +1,5 @@ -#ifndef _PPC64_CHECKSUM_H -#define _PPC64_CHECKSUM_H +#ifndef _ASM_POWERPC_CHECKSUM_H +#define _ASM_POWERPC_CHECKSUM_H /* * This program is free software; you can redistribute it and/or @@ -41,8 +41,14 @@ extern unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum); /* - * the same as csum_partial, but copies from src to dst while it - * checksums + * Computes the checksum of a memory block at src, length len, + * and adds in "sum" (32-bit), while copying the block to dst. + * If an access exception occurs on src or dst, it stores -EFAULT + * to *src_err or *dst_err respectively (if that pointer is not + * NULL), and, for an error on src, zeroes the rest of dst. + * + * Like csum_partial, this must be called with even lengths, + * except for the last fragment. */ extern unsigned int csum_partial_copy_generic(const char *src, char *dst, int len, unsigned int sum, @@ -51,12 +57,18 @@ extern unsigned int csum_partial_copy_generic(const char *src, char *dst, * the same as csum_partial, but copies from src to dst while it * checksums. */ - unsigned int csum_partial_copy_nocheck(const char *src, char *dst, int len, unsigned int sum); +#define csum_partial_copy_from_user(src, dst, len, sum, errp) \ + csum_partial_copy_generic((src), (dst), (len), (sum), (errp), NULL) + +#define csum_partial_copy_nocheck(src, dst, len, sum) \ + csum_partial_copy_generic((src), (dst), (len), (sum), NULL, NULL) + + /* * turns a 32-bit partial checksum (e.g. from csum_partial) into a * 1's complement 16-bit checksum. @@ -83,12 +95,7 @@ static inline unsigned short ip_compute_csum(unsigned char * buff, int len) return csum_fold(csum_partial(buff, len, 0)); } -#define csum_partial_copy_from_user(src, dst, len, sum, errp) \ - csum_partial_copy_generic((src), (dst), (len), (sum), (errp), NULL) - -#define csum_partial_copy_nocheck(src, dst, len, sum) \ - csum_partial_copy_generic((src), (dst), (len), (sum), NULL, NULL) - +#ifdef __powerpc64__ static inline u32 csum_tcpudp_nofold(u32 saddr, u32 daddr, unsigned short len, @@ -103,5 +110,23 @@ static inline u32 csum_tcpudp_nofold(u32 saddr, s += (s >> 32); return (u32) s; } +#else +static inline unsigned long csum_tcpudp_nofold(unsigned long saddr, + unsigned long daddr, + unsigned short len, + unsigned short proto, + unsigned int sum) +{ + __asm__("\n\ + addc %0,%0,%1 \n\ + adde %0,%0,%2 \n\ + adde %0,%0,%3 \n\ + addze %0,%0 \n\ + " + : "=r" (sum) + : "r" (daddr), "r"(saddr), "r"((proto<<16)+len), "0"(sum)); + return sum; +} #endif +#endif diff --git a/include/asm-ppc/checksum.h b/include/asm-ppc/checksum.h deleted file mode 100644 index cf953a92c7a..00000000000 --- a/include/asm-ppc/checksum.h +++ /dev/null @@ -1,107 +0,0 @@ -#ifdef __KERNEL__ -#ifndef _PPC_CHECKSUM_H -#define _PPC_CHECKSUM_H - - -/* - * computes the checksum of a memory block at buff, length len, - * and adds in "sum" (32-bit) - * - * returns a 32-bit number suitable for feeding into itself - * or csum_tcpudp_magic - * - * this function must be called with even lengths, except - * for the last fragment, which may be odd - * - * it's best to have buff aligned on a 32-bit boundary - */ -extern unsigned int csum_partial(const unsigned char * buff, int len, - unsigned int sum); - -/* - * Computes the checksum of a memory block at src, length len, - * and adds in "sum" (32-bit), while copying the block to dst. - * If an access exception occurs on src or dst, it stores -EFAULT - * to *src_err or *dst_err respectively (if that pointer is not - * NULL), and, for an error on src, zeroes the rest of dst. - * - * Like csum_partial, this must be called with even lengths, - * except for the last fragment. - */ -extern unsigned int csum_partial_copy_generic(const char *src, char *dst, - int len, unsigned int sum, - int *src_err, int *dst_err); - -#define csum_partial_copy_from_user(src, dst, len, sum, errp) \ - csum_partial_copy_generic((__force void *)(src), (dst), (len), (sum), (errp), NULL) - -/* FIXME: this needs to be written to really do no check -- Cort */ -#define csum_partial_copy_nocheck(src, dst, len, sum) \ - csum_partial_copy_generic((src), (dst), (len), (sum), NULL, NULL) - -/* - * turns a 32-bit partial checksum (e.g. from csum_partial) into a - * 1's complement 16-bit checksum. - */ -static inline unsigned int csum_fold(unsigned int sum) -{ - unsigned int tmp; - - /* swap the two 16-bit halves of sum */ - __asm__("rlwinm %0,%1,16,0,31" : "=r" (tmp) : "r" (sum)); - /* if there is a carry from adding the two 16-bit halves, - it will carry from the lower half into the upper half, - giving us the correct sum in the upper half. */ - sum = ~(sum + tmp) >> 16; - return sum; -} - -/* - * this routine is used for miscellaneous IP-like checksums, mainly - * in icmp.c - */ -static inline unsigned short ip_compute_csum(unsigned char * buff, int len) -{ - return csum_fold(csum_partial(buff, len, 0)); -} - -/* - * FIXME: I swiped this one from the sparc and made minor modifications. - * It may not be correct. -- Cort - */ -static inline unsigned long csum_tcpudp_nofold(unsigned long saddr, - unsigned long daddr, - unsigned short len, - unsigned short proto, - unsigned int sum) -{ - __asm__("\n\ - addc %0,%0,%1 \n\ - adde %0,%0,%2 \n\ - adde %0,%0,%3 \n\ - addze %0,%0 \n\ - " - : "=r" (sum) - : "r" (daddr), "r"(saddr), "r"((proto<<16)+len), "0"(sum)); - return sum; -} - -/* - * This is a version of ip_compute_csum() optimized for IP headers, - * which always checksum on 4 octet boundaries. ihl is the number - * of 32-bit words and is always >= 5. - */ -extern unsigned short ip_fast_csum(unsigned char * iph, unsigned int ihl); - -/* - * computes the checksum of the TCP/UDP pseudo-header - * returns a 16-bit checksum, already complemented - */ -extern unsigned short csum_tcpudp_magic(unsigned long saddr, - unsigned long daddr, - unsigned short len, - unsigned short proto, - unsigned int sum); - -#endif -#endif /* __KERNEL__ */ |