#ifndef _ASM_POWERPC_CHECKSUM_H #define _ASM_POWERPC_CHECKSUM_H #ifdef __KERNEL__ /* * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifdef CONFIG_GENERIC_CSUM #include <asm-generic/checksum.h> #else /* * 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 __wsum csum_partial_copy_generic(const void *src, void *dst, int len, __wsum sum, int *src_err, int *dst_err); #define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER extern __wsum csum_and_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err_ptr); #define HAVE_CSUM_COPY_USER extern __wsum csum_and_copy_to_user(const void *src, void __user *dst, int len, __wsum sum, int *err_ptr); #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 __sum16 csum_fold(__wsum 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. */ return (__force __sum16)(~((__force u32)sum + tmp) >> 16); } static inline u32 from64to32(u64 x) { /* add up 32-bit and 32-bit for 32+c bit */ x = (x & 0xffffffff) + (x >> 32); /* add up carry.. */ x = (x & 0xffffffff) + (x >> 32); return (u32)x; } static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { #ifdef __powerpc64__ u64 s = (__force u32)sum; s += (__force u32)saddr; s += (__force u32)daddr; #ifdef __BIG_ENDIAN__ s += proto + len; #else s += (proto + len) << 8; #endif return (__force __wsum) from64to32(s); #else __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 + len), "0"(sum)); return sum; #endif } /* * 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)); } #define HAVE_ARCH_CSUM_ADD static inline __wsum csum_add(__wsum csum, __wsum addend) { #ifdef __powerpc64__ u64 res = (__force u64)csum; #endif if (__builtin_constant_p(csum) && csum == 0) return addend; if (__builtin_constant_p(addend) && addend == 0) return csum; #ifdef __powerpc64__ res += (__force u64)addend; return (__force __wsum) from64to32(res); #else asm("addc %0,%0,%1;" "addze %0,%0;" : "+r" (csum) : "r" (addend) : "xer"); return csum; #endif } /* * 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. */ static inline __wsum ip_fast_csum_nofold(const void *iph, unsigned int ihl) { const u32 *ptr = (const u32 *)iph + 1; #ifdef __powerpc64__ unsigned int i; u64 s = *(const u32 *)iph; for (i = 0; i < ihl - 1; i++, ptr++) s += *ptr; return (__force __wsum)from64to32(s); #else __wsum sum, tmp; asm("mtctr %3;" "addc %0,%4,%5;" "1: lwzu %1, 4(%2);" "adde %0,%0,%1;" "bdnz 1b;" "addze %0,%0;" : "=r" (sum), "=r" (tmp), "+b" (ptr) : "r" (ihl - 2), "r" (*(const u32 *)iph), "r" (*ptr) : "ctr", "xer", "memory"); return sum; #endif } static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl) { return csum_fold(ip_fast_csum_nofold(iph, ihl)); } /* * 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 */ __wsum __csum_partial(const void *buff, int len, __wsum sum); static inline __wsum csum_partial(const void *buff, int len, __wsum sum) { if (__builtin_constant_p(len) && len <= 16 && (len & 1) == 0) { if (len == 2) sum = csum_add(sum, (__force __wsum)*(const u16 *)buff); if (len >= 4) sum = csum_add(sum, (__force __wsum)*(const u32 *)buff); if (len == 6) sum = csum_add(sum, (__force __wsum) *(const u16 *)(buff + 4)); if (len >= 8) sum = csum_add(sum, (__force __wsum) *(const u32 *)(buff + 4)); if (len == 10) sum = csum_add(sum, (__force __wsum) *(const u16 *)(buff + 8)); if (len >= 12) sum = csum_add(sum, (__force __wsum) *(const u32 *)(buff + 8)); if (len == 14) sum = csum_add(sum, (__force __wsum) *(const u16 *)(buff + 12)); if (len >= 16) sum = csum_add(sum, (__force __wsum) *(const u32 *)(buff + 12)); } else if (__builtin_constant_p(len) && (len & 3) == 0) { sum = csum_add(sum, ip_fast_csum_nofold(buff, len >> 2)); } else { sum = __csum_partial(buff, len, sum); } return 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)); } #endif #endif /* __KERNEL__ */ #endif
Name | Type | Size | Permission | Actions |
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book3s | Folder | 0755 |
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nohash | Folder | 0755 |
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8xx_immap.h | File | 13.77 KB | 0644 |
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Kbuild | File | 248 B | 0644 |
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accounting.h | File | 1 KB | 0644 |
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agp.h | File | 525 B | 0644 |
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archrandom.h | File | 1016 B | 0644 |
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asm-compat.h | File | 2.53 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-prototypes.h | File | 4.78 KB | 0644 |
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async_tx.h | File | 1.64 KB | 0644 |
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atomic.h | File | 13.57 KB | 0644 |
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backlight.h | File | 1.09 KB | 0644 |
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barrier.h | File | 3.57 KB | 0644 |
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bitops.h | File | 7.8 KB | 0644 |
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bootx.h | File | 1.12 KB | 0644 |
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btext.h | File | 926 B | 0644 |
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bug.h | File | 3.55 KB | 0644 |
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bugs.h | File | 486 B | 0644 |
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cache.h | File | 2.47 KB | 0644 |
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cacheflush.h | File | 3.76 KB | 0644 |
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cell-pmu.h | File | 4.04 KB | 0644 |
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cell-regs.h | File | 9.57 KB | 0644 |
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checksum.h | File | 5.85 KB | 0644 |
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cmpxchg.h | File | 12.16 KB | 0644 |
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code-patching-asm.h | File | 397 B | 0644 |
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code-patching.h | File | 5.01 KB | 0644 |
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compat.h | File | 6.26 KB | 0644 |
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context_tracking.h | File | 245 B | 0644 |
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copro.h | File | 769 B | 0644 |
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cpm.h | File | 5.09 KB | 0644 |
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cpm1.h | File | 21.08 KB | 0644 |
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cpm2.h | File | 48.43 KB | 0644 |
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cpu_has_feature.h | File | 1.31 KB | 0644 |
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cpufeature.h | File | 1.18 KB | 0644 |
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cpuidle.h | File | 3.31 KB | 0644 |
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cputable.h | File | 22.56 KB | 0644 |
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cputhreads.h | File | 2.92 KB | 0644 |
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cputime.h | File | 1.59 KB | 0644 |
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current.h | File | 835 B | 0644 |
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dbdma.h | File | 3.72 KB | 0644 |
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dbell.h | File | 2.78 KB | 0644 |
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dcr-generic.h | File | 1.58 KB | 0644 |
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dcr-mmio.h | File | 1.68 KB | 0644 |
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dcr-native.h | File | 4.42 KB | 0644 |
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dcr-regs.h | File | 5.71 KB | 0644 |
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dcr.h | File | 2.73 KB | 0644 |
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debug.h | File | 1.97 KB | 0644 |
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debugfs.h | File | 489 B | 0644 |
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delay.h | File | 3.42 KB | 0644 |
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device.h | File | 1.1 KB | 0644 |
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disassemble.h | File | 2.73 KB | 0644 |
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dma-mapping.h | File | 4.12 KB | 0644 |
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dma.h | File | 10.51 KB | 0644 |
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dt_cpu_ftrs.h | File | 816 B | 0644 |
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edac.h | File | 1.08 KB | 0644 |
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eeh.h | File | 14.44 KB | 0644 |
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eeh_event.h | File | 1.36 KB | 0644 |
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ehv_pic.h | File | 963 B | 0644 |
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elf.h | File | 6.29 KB | 0644 |
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emergency-restart.h | File | 43 B | 0644 |
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emulated_ops.h | File | 2.58 KB | 0644 |
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epapr_hcalls.h | File | 16.44 KB | 0644 |
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exception-64e.h | File | 7.21 KB | 0644 |
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exception-64s.h | File | 22.72 KB | 0644 |
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exec.h | File | 246 B | 0644 |
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extable.h | File | 904 B | 0644 |
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fadump.h | File | 6.1 KB | 0644 |
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fb.h | File | 483 B | 0644 |
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feature-fixups.h | File | 8.76 KB | 0644 |
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firmware.h | File | 4.71 KB | 0644 |
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fixmap.h | File | 2.33 KB | 0644 |
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floppy.h | File | 4.86 KB | 0644 |
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fs_pd.h | File | 1.02 KB | 0644 |
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fsl_85xx_cache_sram.h | File | 1.43 KB | 0644 |
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fsl_gtm.h | File | 1.38 KB | 0644 |
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fsl_hcalls.h | File | 17.2 KB | 0644 |
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fsl_lbc.h | File | 10.9 KB | 0644 |
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fsl_pamu_stash.h | File | 1.1 KB | 0644 |
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fsl_pm.h | File | 1.36 KB | 0644 |
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ftrace.h | File | 2.1 KB | 0644 |
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futex.h | File | 2.4 KB | 0644 |
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grackle.h | File | 331 B | 0644 |
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hardirq.h | File | 1.15 KB | 0644 |
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head-64.h | File | 13.86 KB | 0644 |
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heathrow.h | File | 2.53 KB | 0644 |
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highmem.h | File | 2.41 KB | 0644 |
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hmi.h | File | 1.49 KB | 0644 |
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hugetlb.h | File | 4.73 KB | 0644 |
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hvcall.h | File | 15.35 KB | 0644 |
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hvconsole.h | File | 1.37 KB | 0644 |
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hvcserver.h | File | 2.09 KB | 0644 |
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hvsi.h | File | 2.78 KB | 0644 |
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hw_breakpoint.h | File | 3.07 KB | 0644 |
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hw_irq.h | File | 5.24 KB | 0644 |
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hydra.h | File | 2.91 KB | 0644 |
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i8259.h | File | 361 B | 0644 |
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ibmebus.h | File | 2.15 KB | 0644 |
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icswx.h | File | 4.71 KB | 0644 |
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ide.h | File | 586 B | 0644 |
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ima.h | File | 772 B | 0644 |
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imc-pmu.h | File | 2.87 KB | 0644 |
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immap_cpm2.h | File | 10.5 KB | 0644 |
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io-defs.h | File | 3.09 KB | 0644 |
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io-workarounds.h | File | 1.54 KB | 0644 |
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io.h | File | 28.02 KB | 0644 |
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io_event_irq.h | File | 1.91 KB | 0644 |
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iommu.h | File | 10.16 KB | 0644 |
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ipic.h | File | 3.51 KB | 0644 |
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irq.h | File | 1.83 KB | 0644 |
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irq_work.h | File | 252 B | 0644 |
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irqflags.h | File | 1.7 KB | 0644 |
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isa-bridge.h | File | 654 B | 0644 |
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jump_label.h | File | 1.62 KB | 0644 |
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kdebug.h | File | 291 B | 0644 |
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kdump.h | File | 1.37 KB | 0644 |
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kexec.h | File | 4.02 KB | 0644 |
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keylargo.h | File | 10.8 KB | 0644 |
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kgdb.h | File | 2.06 KB | 0644 |
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kmap_types.h | File | 434 B | 0644 |
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kprobes.h | File | 3.75 KB | 0644 |
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kup.h | File | 1021 B | 0644 |
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kvm_asm.h | File | 5.46 KB | 0644 |
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kvm_book3s.h | File | 12.06 KB | 0644 |
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kvm_book3s_32.h | File | 1.39 KB | 0644 |
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kvm_book3s_64.h | File | 12.62 KB | 0644 |
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kvm_book3s_asm.h | File | 4.4 KB | 0644 |
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kvm_booke.h | File | 2.68 KB | 0644 |
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kvm_booke_hv_asm.h | File | 2.03 KB | 0644 |
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kvm_fpu.h | File | 2.74 KB | 0644 |
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kvm_host.h | File | 19.92 KB | 0644 |
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kvm_para.h | File | 1.49 KB | 0644 |
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kvm_ppc.h | File | 34.83 KB | 0644 |
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libata-portmap.h | File | 249 B | 0644 |
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linkage.h | File | 501 B | 0644 |
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livepatch.h | File | 1.65 KB | 0644 |
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local.h | File | 3.79 KB | 0644 |
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lppaca.h | File | 5.02 KB | 0644 |
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lv1call.h | File | 18.74 KB | 0644 |
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machdep.h | File | 9.7 KB | 0644 |
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macio.h | File | 3.89 KB | 0644 |
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mc146818rtc.h | File | 943 B | 0644 |
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mce.h | File | 5.58 KB | 0644 |
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mediabay.h | File | 1.34 KB | 0644 |
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mm-arch-hooks.h | File | 839 B | 0644 |
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mman.h | File | 1.33 KB | 0644 |
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mmu-40x.h | File | 1.94 KB | 0644 |
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mmu-44x.h | File | 5.56 KB | 0644 |
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mmu-8xx.h | File | 8.6 KB | 0644 |
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mmu-book3e.h | File | 9.47 KB | 0644 |
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mmu.h | File | 9.2 KB | 0644 |
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mmu_context.h | File | 6.26 KB | 0644 |
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mmzone.h | File | 1.08 KB | 0644 |
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module.h | File | 2.47 KB | 0644 |
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mpc5121.h | File | 3.82 KB | 0644 |
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mpc52xx.h | File | 10.85 KB | 0644 |
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mpc52xx_psc.h | File | 9.89 KB | 0644 |
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mpc5xxx.h | File | 641 B | 0644 |
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mpc6xx.h | File | 143 B | 0644 |
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mpc8260.h | File | 742 B | 0644 |
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mpc85xx.h | File | 2.52 KB | 0644 |
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mpic.h | File | 13.97 KB | 0644 |
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mpic_msgr.h | File | 3.52 KB | 0644 |
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mpic_timer.h | File | 1.39 KB | 0644 |
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msi_bitmap.h | File | 1.01 KB | 0644 |
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nmi.h | File | 238 B | 0644 |
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nvram.h | File | 3.21 KB | 0644 |
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ohare.h | File | 1.64 KB | 0644 |
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opal-api.h | File | 29.34 KB | 0644 |
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opal.h | File | 16.53 KB | 0644 |
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oprofile_impl.h | File | 3 KB | 0644 |
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paca.h | File | 8.06 KB | 0644 |
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page.h | File | 10.65 KB | 0644 |
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page_32.h | File | 1.57 KB | 0644 |
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page_64.h | File | 2.93 KB | 0644 |
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parport.h | File | 956 B | 0644 |
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pasemi_dma.h | File | 23.32 KB | 0644 |
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pci-bridge.h | File | 9.21 KB | 0644 |
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pci.h | File | 4.58 KB | 0644 |
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percpu.h | File | 468 B | 0644 |
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perf_event.h | File | 1.23 KB | 0644 |
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perf_event_fsl_emb.h | File | 1.42 KB | 0644 |
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perf_event_server.h | File | 6.3 KB | 0644 |
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pgalloc.h | File | 620 B | 0644 |
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pgtable-be-types.h | File | 2.76 KB | 0644 |
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pgtable-types.h | File | 1.94 KB | 0644 |
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pgtable.h | File | 2.45 KB | 0644 |
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plpar_wrappers.h | File | 8.35 KB | 0644 |
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pmac_feature.h | File | 13.08 KB | 0644 |
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pmac_low_i2c.h | File | 3.24 KB | 0644 |
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pmac_pfunc.h | File | 8.01 KB | 0644 |
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pmc.h | File | 1.35 KB | 0644 |
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pmi.h | File | 1.77 KB | 0644 |
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pnv-ocxl.h | File | 1.4 KB | 0644 |
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pnv-pci.h | File | 3.22 KB | 0644 |
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powernv.h | File | 1.57 KB | 0644 |
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ppc-opcode.h | File | 19.05 KB | 0644 |
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ppc-pci.h | File | 2.69 KB | 0644 |
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ppc4xx.h | File | 530 B | 0644 |
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ppc4xx_ocm.h | File | 1.41 KB | 0644 |
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ppc_asm.h | File | 21.63 KB | 0644 |
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probes.h | File | 2.11 KB | 0644 |
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processor.h | File | 15 KB | 0644 |
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prom.h | File | 7.17 KB | 0644 |
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ps3.h | File | 15.44 KB | 0644 |
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ps3av.h | File | 23.49 KB | 0644 |
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ps3gpu.h | File | 2.44 KB | 0644 |
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ps3stor.h | File | 1.99 KB | 0644 |
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pte-common.h | File | 6.27 KB | 0644 |
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pte-walk.h | File | 1.11 KB | 0644 |
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ptrace.h | File | 7.14 KB | 0644 |
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reg.h | File | 61.61 KB | 0644 |
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reg_8xx.h | File | 4.96 KB | 0644 |
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reg_a2.h | File | 6.16 KB | 0644 |
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reg_booke.h | File | 36.17 KB | 0644 |
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reg_fsl_emb.h | File | 3.65 KB | 0644 |
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rheap.h | File | 2.43 KB | 0644 |
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rio.h | File | 637 B | 0644 |
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rtas.h | File | 14.67 KB | 0644 |
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runlatch.h | File | 1.16 KB | 0644 |
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scom.h | File | 4.92 KB | 0644 |
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seccomp.h | File | 249 B | 0644 |
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sections.h | File | 1.9 KB | 0644 |
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security_features.h | File | 3.03 KB | 0644 |
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serial.h | File | 677 B | 0644 |
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setjmp.h | File | 630 B | 0644 |
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setup.h | File | 2.44 KB | 0644 |
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sfp-machine.h | File | 12.38 KB | 0644 |
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shmparam.h | File | 206 B | 0644 |
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signal.h | File | 225 B | 0644 |
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slice.h | File | 1.12 KB | 0644 |
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smp.h | File | 6.13 KB | 0644 |
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smu.h | File | 19.33 KB | 0644 |
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sparsemem.h | File | 1.1 KB | 0644 |
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spinlock.h | File | 7.04 KB | 0644 |
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spinlock_types.h | File | 424 B | 0644 |
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spu.h | File | 25.28 KB | 0644 |
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spu_csa.h | File | 6.64 KB | 0644 |
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spu_info.h | File | 908 B | 0644 |
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spu_priv1.h | File | 5.68 KB | 0644 |
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sstep.h | File | 4.58 KB | 0644 |
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string.h | File | 1.74 KB | 0644 |
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swab.h | File | 377 B | 0644 |
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swiotlb.h | File | 810 B | 0644 |
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switch_to.h | File | 2.66 KB | 0644 |
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synch.h | File | 1.36 KB | 0644 |
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syscall.h | File | 2.8 KB | 0644 |
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syscalls.h | File | 684 B | 0644 |
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systbl.h | File | 9.28 KB | 0644 |
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tce.h | File | 1.72 KB | 0644 |
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termios.h | File | 860 B | 0644 |
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thread_info.h | File | 5.31 KB | 0644 |
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time.h | File | 4.82 KB | 0644 |
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timex.h | File | 967 B | 0644 |
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tlb.h | File | 2.47 KB | 0644 |
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tlbflush.h | File | 2.93 KB | 0644 |
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tm.h | File | 690 B | 0644 |
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topology.h | File | 2.92 KB | 0644 |
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trace.h | File | 4.17 KB | 0644 |
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trace_clock.h | File | 517 B | 0644 |
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tsi108.h | File | 3.39 KB | 0644 |
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tsi108_irq.h | File | 4.48 KB | 0644 |
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tsi108_pci.h | File | 1.82 KB | 0644 |
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types.h | File | 1 KB | 0644 |
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uaccess.h | File | 13.21 KB | 0644 |
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udbg.h | File | 2.16 KB | 0644 |
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uic.h | File | 616 B | 0644 |
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unaligned.h | File | 548 B | 0644 |
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uninorth.h | File | 8.21 KB | 0644 |
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unistd.h | File | 1.52 KB | 0644 |
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uprobes.h | File | 1.41 KB | 0644 |
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user.h | File | 2.14 KB | 0644 |
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vas.h | File | 4.61 KB | 0644 |
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vdso.h | File | 1.53 KB | 0644 |
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vdso_datapage.h | File | 4.4 KB | 0644 |
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vga.h | File | 1.24 KB | 0644 |
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vio.h | File | 4.79 KB | 0644 |
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word-at-a-time.h | File | 4.75 KB | 0644 |
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xics.h | File | 4.31 KB | 0644 |
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xilinx_intc.h | File | 598 B | 0644 |
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xilinx_pci.h | File | 551 B | 0644 |
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xive-regs.h | File | 3.73 KB | 0644 |
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xive.h | File | 5.35 KB | 0644 |
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xmon.h | File | 927 B | 0644 |
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xor.h | File | 2.11 KB | 0644 |
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