#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", "memory"); return csum_fold(sum); } static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 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, __u32 len, __u8 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, __u8 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 */
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adc.h | File | 253 B | 0644 |
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addrspace.h | File | 2.03 KB | 0644 |
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alignment.h | File | 654 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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atomic-grb.h | File | 2.6 KB | 0644 |
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atomic-irq.h | File | 1.63 KB | 0644 |
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atomic-llsc.h | File | 2.12 KB | 0644 |
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barrier.h | File | 1.52 KB | 0644 |
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bitops-cas.h | File | 1.73 KB | 0644 |
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bitops-llsc.h | File | 2.79 KB | 0644 |
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bitops.h | File | 2.38 KB | 0644 |
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cache.h | File | 1.2 KB | 0644 |
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cache_insns_64.h | File | 839 B | 0644 |
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cacheflush.h | File | 3.58 KB | 0644 |
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checksum.h | File | 140 B | 0644 |
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checksum_32.h | File | 5.21 KB | 0644 |
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clock.h | File | 436 B | 0644 |
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cmpxchg-cas.h | File | 549 B | 0644 |
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cmpxchg-grb.h | File | 2.8 KB | 0644 |
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cmpxchg-irq.h | File | 1.04 KB | 0644 |
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cmpxchg-llsc.h | File | 1.06 KB | 0644 |
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dma-mapping.h | File | 694 B | 0644 |
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elf.h | File | 7.28 KB | 0644 |
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fb.h | File | 375 B | 0644 |
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fixmap.h | File | 2.92 KB | 0644 |
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flat.h | File | 1.23 KB | 0644 |
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fpu.h | File | 1.77 KB | 0644 |
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ftrace.h | File | 1.11 KB | 0644 |
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futex-cas.h | File | 728 B | 0644 |
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gpio.h | File | 1017 B | 0644 |
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hardirq.h | File | 440 B | 0644 |
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hd64461.h | File | 11.79 KB | 0644 |
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heartbeat.h | File | 383 B | 0644 |
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hugetlb.h | File | 1.96 KB | 0644 |
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hw_breakpoint.h | File | 1.88 KB | 0644 |
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i2c-sh7760.h | File | 406 B | 0644 |
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kmap_types.h | File | 265 B | 0644 |
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mmzone.h | File | 1.1 KB | 0644 |
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page.h | File | 6.06 KB | 0644 |
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pci.h | File | 3.19 KB | 0644 |
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processor.h | File | 4.41 KB | 0644 |
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processor_64.h | File | 5.54 KB | 0644 |
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ptrace.h | File | 3.39 KB | 0644 |
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ptrace_64.h | File | 312 B | 0644 |
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push-switch.h | File | 755 B | 0644 |
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reboot.h | File | 472 B | 0644 |
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romimage-macros.h | File | 1.1 KB | 0644 |
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rtc.h | File | 383 B | 0644 |
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seccomp.h | File | 280 B | 0644 |
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sections.h | File | 311 B | 0644 |
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segment.h | File | 879 B | 0644 |
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setup.h | File | 725 B | 0644 |
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sfp-machine.h | File | 3.43 KB | 0644 |
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sh7760fb.h | File | 5.61 KB | 0644 |
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sh_bios.h | File | 743 B | 0644 |
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shmparam.h | File | 629 B | 0644 |
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siu.h | File | 539 B | 0644 |
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smc37c93x.h | File | 5.56 KB | 0644 |
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smp-ops.h | File | 1012 B | 0644 |
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smp.h | File | 1.83 KB | 0644 |
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sparsemem.h | File | 443 B | 0644 |
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spi.h | File | 265 B | 0644 |
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spinlock-cas.h | File | 2.09 KB | 0644 |
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spinlock-llsc.h | File | 4.13 KB | 0644 |
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spinlock.h | File | 578 B | 0644 |
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spinlock_types.h | File | 463 B | 0644 |
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sram.h | File | 670 B | 0644 |
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stackprotector.h | File | 711 B | 0644 |
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stacktrace.h | File | 606 B | 0644 |
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string.h | File | 131 B | 0644 |
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string_32.h | File | 2.66 KB | 0644 |
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string_64.h | File | 499 B | 0644 |
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suspend.h | File | 2.52 KB | 0644 |
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switch_to.h | File | 492 B | 0644 |
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switch_to_32.h | File | 3.55 KB | 0644 |
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syscall.h | File | 267 B | 0644 |
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syscall_32.h | File | 2.42 KB | 0644 |
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syscall_64.h | File | 1.79 KB | 0644 |
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syscalls.h | File | 564 B | 0644 |
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syscalls_32.h | File | 1022 B | 0644 |
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syscalls_64.h | File | 441 B | 0644 |
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thread_info.h | File | 5.32 KB | 0644 |
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timex.h | File | 637 B | 0644 |
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tlb.h | File | 4.12 KB | 0644 |
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tlb_64.h | File | 2.08 KB | 0644 |
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tlbflush.h | File | 1.77 KB | 0644 |
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topology.h | File | 645 B | 0644 |
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traps.h | File | 487 B | 0644 |
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traps_32.h | File | 1.31 KB | 0644 |
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traps_64.h | File | 851 B | 0644 |
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types.h | File | 411 B | 0644 |
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uaccess.h | File | 4.83 KB | 0644 |
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uaccess_32.h | File | 3.77 KB | 0644 |
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uaccess_64.h | File | 2.2 KB | 0644 |
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unaligned-sh4a.h | File | 4.51 KB | 0644 |
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unaligned.h | File | 359 B | 0644 |
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uncached.h | File | 1.34 KB | 0644 |
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unistd.h | File | 952 B | 0644 |
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unwinder.h | File | 856 B | 0644 |
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user.h | File | 2.52 KB | 0644 |
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vga.h | File | 98 B | 0644 |
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vmlinux.lds.h | File | 558 B | 0644 |
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watchdog.h | File | 4.14 KB | 0644 |
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word-at-a-time.h | File | 1.29 KB | 0644 |
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