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author | Paul Mundt <lethal@linux-sh.org> | 2007-11-11 08:36:13 (GMT) |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-01-28 04:18:45 (GMT) |
commit | fcfdd0f14f94d47f2f650a24cd111e11475ccada (patch) | |
tree | 3aa31620c31d66fb1ed72a93a3345e454f1df652 /include | |
parent | 63e2c803326babe74033b3cbe6e8c550037c554f (diff) | |
download | linux-fsl-qoriq-fcfdd0f14f94d47f2f650a24cd111e11475ccada.tar.xz |
sh: Split out checksum.h in to _32 and _64 variants.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/asm-sh/checksum.h | 216 | ||||
-rw-r--r-- | include/asm-sh/checksum_32.h | 215 | ||||
-rw-r--r-- | include/asm-sh/checksum_64.h (renamed from include/asm-sh64/checksum.h) | 2 |
3 files changed, 218 insertions, 215 deletions
diff --git a/include/asm-sh/checksum.h b/include/asm-sh/checksum.h index 4bc8357..67496ab 100644 --- a/include/asm-sh/checksum.h +++ b/include/asm-sh/checksum.h @@ -1,215 +1,5 @@ -#ifndef __ASM_SH_CHECKSUM_H -#define __ASM_SH_CHECKSUM_H - -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1999 by Kaz Kojima & Niibe Yutaka - */ - -#include <linux/in6.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 - */ -asmlinkage __wsum csum_partial(const void *buff, int len, __wsum sum); - -/* - * the same as csum_partial, but copies from src while it - * checksums, and handles user-space pointer exceptions correctly, when needed. - * - * here even more important to align src and dst on a 32-bit (or even - * better 64-bit) boundary - */ - -asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst, - int len, __wsum sum, - int *src_err_ptr, int *dst_err_ptr); - -/* - * Note: when you get a NULL pointer exception here this means someone - * passed in an incorrect kernel address to one of these functions. - * - * If you use these functions directly please don't forget the - * access_ok(). - */ -static inline -__wsum csum_partial_copy_nocheck(const void *src, void *dst, - int len, __wsum sum) -{ - return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL); -} - -static inline -__wsum csum_partial_copy_from_user(const void __user *src, void *dst, - int len, __wsum sum, int *err_ptr) -{ - return csum_partial_copy_generic((__force const void *)src, dst, - len, sum, err_ptr, NULL); -} - -/* - * Fold a partial checksum - */ - -static inline __sum16 csum_fold(__wsum sum) -{ - unsigned int __dummy; - __asm__("swap.w %0, %1\n\t" - "extu.w %0, %0\n\t" - "extu.w %1, %1\n\t" - "add %1, %0\n\t" - "swap.w %0, %1\n\t" - "add %1, %0\n\t" - "not %0, %0\n\t" - : "=r" (sum), "=&r" (__dummy) - : "0" (sum) - : "t"); - return (__force __sum16)sum; -} - -/* - * This is a version of ip_compute_csum() optimized for IP headers, - * which always checksum on 4 octet boundaries. - * - * i386 version by Jorge Cwik <jorge@laser.satlink.net>, adapted - * for linux by * Arnt Gulbrandsen. - */ -static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) -{ - unsigned int sum, __dummy0, __dummy1; - - __asm__ __volatile__( - "mov.l @%1+, %0\n\t" - "mov.l @%1+, %3\n\t" - "add #-2, %2\n\t" - "clrt\n\t" - "1:\t" - "addc %3, %0\n\t" - "movt %4\n\t" - "mov.l @%1+, %3\n\t" - "dt %2\n\t" - "bf/s 1b\n\t" - " cmp/eq #1, %4\n\t" - "addc %3, %0\n\t" - "addc %2, %0" /* Here %2 is 0, add carry-bit */ - /* Since the input registers which are loaded with iph and ihl - are modified, we must also specify them as outputs, or gcc - will assume they contain their original values. */ - : "=r" (sum), "=r" (iph), "=r" (ihl), "=&r" (__dummy0), "=&z" (__dummy1) - : "1" (iph), "2" (ihl) - : "t"); - - return csum_fold(sum); -} - -static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, - unsigned short len, - unsigned short proto, - __wsum sum) -{ -#ifdef __LITTLE_ENDIAN__ - unsigned long len_proto = (proto + len) << 8; +#ifdef CONFIG_SUPERH32 +# include "checksum_32.h" #else - unsigned long len_proto = proto + len; +# include "checksum_64.h" #endif - __asm__("clrt\n\t" - "addc %0, %1\n\t" - "addc %2, %1\n\t" - "addc %3, %1\n\t" - "movt %0\n\t" - "add %1, %0" - : "=r" (sum), "=r" (len_proto) - : "r" (daddr), "r" (saddr), "1" (len_proto), "0" (sum) - : "t"); - - return sum; -} - -/* - * computes the checksum of the TCP/UDP pseudo-header - * returns a 16-bit checksum, already complemented - */ -static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, - unsigned short len, - unsigned short proto, - __wsum sum) -{ - return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum)); -} - -/* - * this routine is used for miscellaneous IP-like checksums, mainly - * in icmp.c - */ -static inline __sum16 ip_compute_csum(const void *buff, int len) -{ - return csum_fold(csum_partial(buff, len, 0)); -} - -#define _HAVE_ARCH_IPV6_CSUM -static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr, - const struct in6_addr *daddr, - __u32 len, unsigned short proto, - __wsum sum) -{ - unsigned int __dummy; - __asm__("clrt\n\t" - "mov.l @(0,%2), %1\n\t" - "addc %1, %0\n\t" - "mov.l @(4,%2), %1\n\t" - "addc %1, %0\n\t" - "mov.l @(8,%2), %1\n\t" - "addc %1, %0\n\t" - "mov.l @(12,%2), %1\n\t" - "addc %1, %0\n\t" - "mov.l @(0,%3), %1\n\t" - "addc %1, %0\n\t" - "mov.l @(4,%3), %1\n\t" - "addc %1, %0\n\t" - "mov.l @(8,%3), %1\n\t" - "addc %1, %0\n\t" - "mov.l @(12,%3), %1\n\t" - "addc %1, %0\n\t" - "addc %4, %0\n\t" - "addc %5, %0\n\t" - "movt %1\n\t" - "add %1, %0\n" - : "=r" (sum), "=&r" (__dummy) - : "r" (saddr), "r" (daddr), - "r" (htonl(len)), "r" (htonl(proto)), "0" (sum) - : "t"); - - return csum_fold(sum); -} - -/* - * Copy and checksum to user - */ -#define HAVE_CSUM_COPY_USER -static inline __wsum csum_and_copy_to_user(const void *src, - void __user *dst, - int len, __wsum sum, - int *err_ptr) -{ - if (access_ok(VERIFY_WRITE, dst, len)) - return csum_partial_copy_generic((__force const void *)src, - dst, len, sum, NULL, err_ptr); - - if (len) - *err_ptr = -EFAULT; - - return (__force __wsum)-1; /* invalid checksum */ -} -#endif /* __ASM_SH_CHECKSUM_H */ diff --git a/include/asm-sh/checksum_32.h b/include/asm-sh/checksum_32.h new file mode 100644 index 0000000..4bc8357 --- /dev/null +++ b/include/asm-sh/checksum_32.h @@ -0,0 +1,215 @@ +#ifndef __ASM_SH_CHECKSUM_H +#define __ASM_SH_CHECKSUM_H + +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1999 by Kaz Kojima & Niibe Yutaka + */ + +#include <linux/in6.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 + */ +asmlinkage __wsum csum_partial(const void *buff, int len, __wsum sum); + +/* + * the same as csum_partial, but copies from src while it + * checksums, and handles user-space pointer exceptions correctly, when needed. + * + * here even more important to align src and dst on a 32-bit (or even + * better 64-bit) boundary + */ + +asmlinkage __wsum csum_partial_copy_generic(const void *src, void *dst, + int len, __wsum sum, + int *src_err_ptr, int *dst_err_ptr); + +/* + * Note: when you get a NULL pointer exception here this means someone + * passed in an incorrect kernel address to one of these functions. + * + * If you use these functions directly please don't forget the + * access_ok(). + */ +static inline +__wsum csum_partial_copy_nocheck(const void *src, void *dst, + int len, __wsum sum) +{ + return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL); +} + +static inline +__wsum csum_partial_copy_from_user(const void __user *src, void *dst, + int len, __wsum sum, int *err_ptr) +{ + return csum_partial_copy_generic((__force const void *)src, dst, + len, sum, err_ptr, NULL); +} + +/* + * Fold a partial checksum + */ + +static inline __sum16 csum_fold(__wsum sum) +{ + unsigned int __dummy; + __asm__("swap.w %0, %1\n\t" + "extu.w %0, %0\n\t" + "extu.w %1, %1\n\t" + "add %1, %0\n\t" + "swap.w %0, %1\n\t" + "add %1, %0\n\t" + "not %0, %0\n\t" + : "=r" (sum), "=&r" (__dummy) + : "0" (sum) + : "t"); + return (__force __sum16)sum; +} + +/* + * This is a version of ip_compute_csum() optimized for IP headers, + * which always checksum on 4 octet boundaries. + * + * i386 version by Jorge Cwik <jorge@laser.satlink.net>, adapted + * for linux by * Arnt Gulbrandsen. + */ +static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) +{ + unsigned int sum, __dummy0, __dummy1; + + __asm__ __volatile__( + "mov.l @%1+, %0\n\t" + "mov.l @%1+, %3\n\t" + "add #-2, %2\n\t" + "clrt\n\t" + "1:\t" + "addc %3, %0\n\t" + "movt %4\n\t" + "mov.l @%1+, %3\n\t" + "dt %2\n\t" + "bf/s 1b\n\t" + " cmp/eq #1, %4\n\t" + "addc %3, %0\n\t" + "addc %2, %0" /* Here %2 is 0, add carry-bit */ + /* Since the input registers which are loaded with iph and ihl + are modified, we must also specify them as outputs, or gcc + will assume they contain their original values. */ + : "=r" (sum), "=r" (iph), "=r" (ihl), "=&r" (__dummy0), "=&z" (__dummy1) + : "1" (iph), "2" (ihl) + : "t"); + + return csum_fold(sum); +} + +static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, + unsigned short len, + unsigned short proto, + __wsum sum) +{ +#ifdef __LITTLE_ENDIAN__ + unsigned long len_proto = (proto + len) << 8; +#else + unsigned long len_proto = proto + len; +#endif + __asm__("clrt\n\t" + "addc %0, %1\n\t" + "addc %2, %1\n\t" + "addc %3, %1\n\t" + "movt %0\n\t" + "add %1, %0" + : "=r" (sum), "=r" (len_proto) + : "r" (daddr), "r" (saddr), "1" (len_proto), "0" (sum) + : "t"); + + return sum; +} + +/* + * computes the checksum of the TCP/UDP pseudo-header + * returns a 16-bit checksum, already complemented + */ +static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, + unsigned short len, + unsigned short proto, + __wsum sum) +{ + return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum)); +} + +/* + * this routine is used for miscellaneous IP-like checksums, mainly + * in icmp.c + */ +static inline __sum16 ip_compute_csum(const void *buff, int len) +{ + return csum_fold(csum_partial(buff, len, 0)); +} + +#define _HAVE_ARCH_IPV6_CSUM +static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr, + const struct in6_addr *daddr, + __u32 len, unsigned short proto, + __wsum sum) +{ + unsigned int __dummy; + __asm__("clrt\n\t" + "mov.l @(0,%2), %1\n\t" + "addc %1, %0\n\t" + "mov.l @(4,%2), %1\n\t" + "addc %1, %0\n\t" + "mov.l @(8,%2), %1\n\t" + "addc %1, %0\n\t" + "mov.l @(12,%2), %1\n\t" + "addc %1, %0\n\t" + "mov.l @(0,%3), %1\n\t" + "addc %1, %0\n\t" + "mov.l @(4,%3), %1\n\t" + "addc %1, %0\n\t" + "mov.l @(8,%3), %1\n\t" + "addc %1, %0\n\t" + "mov.l @(12,%3), %1\n\t" + "addc %1, %0\n\t" + "addc %4, %0\n\t" + "addc %5, %0\n\t" + "movt %1\n\t" + "add %1, %0\n" + : "=r" (sum), "=&r" (__dummy) + : "r" (saddr), "r" (daddr), + "r" (htonl(len)), "r" (htonl(proto)), "0" (sum) + : "t"); + + return csum_fold(sum); +} + +/* + * Copy and checksum to user + */ +#define HAVE_CSUM_COPY_USER +static inline __wsum csum_and_copy_to_user(const void *src, + void __user *dst, + int len, __wsum sum, + int *err_ptr) +{ + if (access_ok(VERIFY_WRITE, dst, len)) + return csum_partial_copy_generic((__force const void *)src, + dst, len, sum, NULL, err_ptr); + + if (len) + *err_ptr = -EFAULT; + + return (__force __wsum)-1; /* invalid checksum */ +} +#endif /* __ASM_SH_CHECKSUM_H */ diff --git a/include/asm-sh64/checksum.h b/include/asm-sh/checksum_64.h index ba594cc..ec79b92 100644 --- a/include/asm-sh64/checksum.h +++ b/include/asm-sh/checksum_64.h @@ -12,8 +12,6 @@ * */ -#include <asm/registers.h> - /* * computes the checksum of a memory block at buff, length len, * and adds in "sum" (32-bit) |