#ifdef __KERNEL__ #ifndef _ASM_M32R_CHECKSUM_H #define _ASM_M32R_CHECKSUM_H /* * include/asm-m32r/checksum.h * * IP/TCP/UDP checksum routines * * 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. * * Some code taken from mips and parisc architecture. * * Copyright (C) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> */ #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. * * Here even more important to align src and dst on a 32-bit (or even * better 64-bit) boundary */ extern __wsum csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum); /* * This is a new version of the above that records errors it finds in *errp, * but continues and zeros thre rest of the buffer. */ extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err_ptr); /* * Fold a partial checksum */ static inline __sum16 csum_fold(__wsum sum) { unsigned long tmpreg; __asm__( " sll3 %1, %0, #16 \n" " cmp %0, %0 \n" " addx %0, %1 \n" " ldi %1, #0 \n" " srli %0, #16 \n" " addx %0, %1 \n" " xor3 %0, %0, #0x0000ffff \n" : "=r" (sum), "=&r" (tmpreg) : "0" (sum) : "cbit" ); return (__force __sum16)sum; } /* * This is a version of ip_compute_csum() optimized for IP headers, * which always checksum on 4 octet boundaries. */ static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) { unsigned long tmpreg0, tmpreg1; __wsum sum; __asm__ __volatile__( " ld %0, @%1+ \n" " addi %2, #-4 \n" "# bgez %2, 2f \n" " cmp %0, %0 \n" " ld %3, @%1+ \n" " ld %4, @%1+ \n" " addx %0, %3 \n" " ld %3, @%1+ \n" " addx %0, %4 \n" " addx %0, %3 \n" " .fillinsn\n" "1: \n" " ld %4, @%1+ \n" " addi %2, #-1 \n" " addx %0, %4 \n" " bgtz %2, 1b \n" "\n" " ldi %3, #0 \n" " addx %0, %3 \n" " .fillinsn\n" "2: \n" /* 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" (tmpreg0), "=&r" (tmpreg1) : "1" (iph), "2" (ihl) : "cbit", "memory"); return csum_fold(sum); } static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { #if defined(__LITTLE_ENDIAN) unsigned long len_proto = (proto + len) << 8; #else unsigned long len_proto = proto + len; #endif unsigned long tmpreg; __asm__( " cmp %0, %0 \n" " addx %0, %2 \n" " addx %0, %3 \n" " addx %0, %4 \n" " ldi %1, #0 \n" " addx %0, %1 \n" : "=r" (sum), "=&r" (tmpreg) : "r" (daddr), "r" (saddr), "r" (len_proto), "0" (sum) : "cbit" ); 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, unsigned short proto, __wsum sum) { unsigned long tmpreg0, tmpreg1, tmpreg2, tmpreg3; __asm__( " ld %1, @(%5) \n" " ld %2, @(4,%5) \n" " ld %3, @(8,%5) \n" " ld %4, @(12,%5) \n" " add %0, %1 \n" " addx %0, %2 \n" " addx %0, %3 \n" " addx %0, %4 \n" " ld %1, @(%6) \n" " ld %2, @(4,%6) \n" " ld %3, @(8,%6) \n" " ld %4, @(12,%6) \n" " addx %0, %1 \n" " addx %0, %2 \n" " addx %0, %3 \n" " addx %0, %4 \n" " addx %0, %7 \n" " addx %0, %8 \n" " ldi %1, #0 \n" " addx %0, %1 \n" : "=&r" (sum), "=&r" (tmpreg0), "=&r" (tmpreg1), "=&r" (tmpreg2), "=&r" (tmpreg3) : "r" (saddr), "r" (daddr), "r" (htonl(len)), "r" (htonl(proto)), "0" (sum) : "cbit" ); return csum_fold(sum); } #endif /* _ASM_M32R_CHECKSUM_H */ #endif /* __KERNEL__ */
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m32104ut | Folder | 0755 |
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m32700ut | Folder | 0755 |
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mappi2 | Folder | 0755 |
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mappi3 | Folder | 0755 |
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opsput | Folder | 0755 |
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Kbuild | File | 318 B | 0644 |
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addrspace.h | File | 1.67 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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assembler.h | File | 4.2 KB | 0644 |
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atomic.h | File | 6.29 KB | 0644 |
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barrier.h | File | 506 B | 0644 |
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bitops.h | File | 6.23 KB | 0644 |
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bug.h | File | 115 B | 0644 |
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bugs.h | File | 410 B | 0644 |
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cache.h | File | 222 B | 0644 |
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cachectl.h | File | 739 B | 0644 |
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cacheflush.h | File | 3.2 KB | 0644 |
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checksum.h | File | 4.83 KB | 0644 |
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cmpxchg.h | File | 4.86 KB | 0644 |
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dcache_clear.h | File | 1.01 KB | 0644 |
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delay.h | File | 31 B | 0644 |
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device.h | File | 148 B | 0644 |
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div64.h | File | 31 B | 0644 |
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dma-mapping.h | File | 570 B | 0644 |
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dma.h | File | 281 B | 0644 |
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elf.h | File | 3.64 KB | 0644 |
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emergency-restart.h | File | 188 B | 0644 |
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fb.h | File | 414 B | 0644 |
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flat.h | File | 4.2 KB | 0644 |
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ftrace.h | File | 12 B | 0644 |
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futex.h | File | 82 B | 0644 |
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hardirq.h | File | 214 B | 0644 |
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hw_irq.h | File | 87 B | 0644 |
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io.h | File | 6.44 KB | 0644 |
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irq.h | File | 2.94 KB | 0644 |
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irq_regs.h | File | 34 B | 0644 |
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irqflags.h | File | 2.24 KB | 0644 |
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kdebug.h | File | 32 B | 0644 |
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kmap_types.h | File | 251 B | 0644 |
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linkage.h | File | 177 B | 0644 |
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local.h | File | 7.8 KB | 0644 |
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local64.h | File | 33 B | 0644 |
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m32102.h | File | 14.71 KB | 0644 |
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m32r.h | File | 5.7 KB | 0644 |
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m32r_mp_fpga.h | File | 14.89 KB | 0644 |
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mc146818rtc.h | File | 671 B | 0644 |
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mmu.h | File | 403 B | 0644 |
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mmu_context.h | File | 4.23 KB | 0644 |
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mmzone.h | File | 1.29 KB | 0644 |
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page.h | File | 2.62 KB | 0644 |
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pci.h | File | 147 B | 0644 |
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percpu.h | File | 165 B | 0644 |
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pgalloc.h | File | 1.84 KB | 0644 |
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pgtable-2level.h | File | 2.31 KB | 0644 |
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pgtable.h | File | 9.7 KB | 0644 |
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processor.h | File | 2.93 KB | 0644 |
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ptrace.h | File | 1.3 KB | 0644 |
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rtc.h | File | 1.99 KB | 0644 |
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s1d13806.h | File | 9.84 KB | 0644 |
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segment.h | File | 228 B | 0644 |
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serial.h | File | 187 B | 0644 |
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setup.h | File | 1022 B | 0644 |
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shmparam.h | File | 197 B | 0644 |
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signal.h | File | 561 B | 0644 |
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smp.h | File | 3.5 KB | 0644 |
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spinlock.h | File | 7.15 KB | 0644 |
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spinlock_types.h | File | 520 B | 0644 |
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string.h | File | 378 B | 0644 |
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switch_to.h | File | 1.48 KB | 0644 |
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termios.h | File | 1.74 KB | 0644 |
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thread_info.h | File | 3.71 KB | 0644 |
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tlbflush.h | File | 2.94 KB | 0644 |
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topology.h | File | 167 B | 0644 |
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types.h | File | 258 B | 0644 |
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uaccess.h | File | 15.3 KB | 0644 |
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ucontext.h | File | 321 B | 0644 |
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unaligned.h | File | 592 B | 0644 |
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unistd.h | File | 1.23 KB | 0644 |
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user.h | File | 2.1 KB | 0644 |
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