/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _CRIS_ARCH_CHECKSUM_H #define _CRIS_ARCH_CHECKSUM_H /* Checksum some values used in TCP/UDP headers. * * The gain by doing this in asm is that C will not generate carry-additions * for the 32-bit components of the checksum, so otherwise we would have had * to split all of those into 16-bit components, then add. */ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { __wsum res; __asm__ ("add.d %2, %0\n\t" "ax\n\t" "add.d %3, %0\n\t" "ax\n\t" "add.d %4, %0\n\t" "ax\n\t" "addq 0, %0\n" : "=r" (res) : "0" (sum), "r" (daddr), "r" (saddr), "r" ((len + proto) << 8)); return res; } #endif
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bitops.h | File | 1.81 KB | 0644 |
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bug.h | File | 2.07 KB | 0644 |
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cache.h | File | 219 B | 0644 |
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checksum.h | File | 726 B | 0644 |
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delay.h | File | 394 B | 0644 |
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dma.h | File | 1.74 KB | 0644 |
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io.h | File | 6.46 KB | 0644 |
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io_interface_mux.h | File | 2.02 KB | 0644 |
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irq.h | File | 5.95 KB | 0644 |
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irqflags.h | File | 994 B | 0644 |
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memmap.h | File | 680 B | 0644 |
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mmu.h | File | 3.4 KB | 0644 |
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offset.h | File | 1.19 KB | 0644 |
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page.h | File | 920 B | 0644 |
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pgtable.h | File | 324 B | 0644 |
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processor.h | File | 2 KB | 0644 |
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swab.h | File | 672 B | 0644 |
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system.h | File | 809 B | 0644 |
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thread_info.h | File | 335 B | 0644 |
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timex.h | File | 982 B | 0644 |
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tlb.h | File | 394 B | 0644 |
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uaccess.h | File | 17.7 KB | 0644 |
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unistd.h | File | 4.38 KB | 0644 |
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