/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_CRIS_ARCH_CHECKSUM_H #define _ASM_CRIS_ARCH_CHECKSUM_H /* * Check values used in TCP/UDP headers. * * The gain of doing this in assembler instead of C, is that C doesn't * generate carry-additions for the 32-bit components of the * checksum. Which means it would be necessary to split all those into * 16-bit components and then add. */ static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __wsum sum) { __wsum res; __asm__ __volatile__ ("add.d %2, %0\n\t" "addc %3, %0\n\t" "addc %4, %0\n\t" "addc 0, %0\n\t" : "=r" (res) : "0" (sum), "r" (daddr), "r" (saddr), \ "r" ((len + proto) << 8)); return res; } #endif /* _ASM_CRIS_ARCH_CHECKSUM_H */
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hwregs | Folder | 0755 |
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bitops.h | File | 1.29 KB | 0644 |
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bug.h | File | 1008 B | 0644 |
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cache.h | File | 601 B | 0644 |
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checksum.h | File | 807 B | 0644 |
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cryptocop.h | File | 4.25 KB | 0644 |
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delay.h | File | 649 B | 0644 |
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dma.h | File | 22 B | 0644 |
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intmem.h | File | 339 B | 0644 |
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irq.h | File | 3.55 KB | 0644 |
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irqflags.h | File | 1 KB | 0644 |
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memmap.h | File | 25 B | 0644 |
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mmu.h | File | 4.07 KB | 0644 |
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offset.h | File | 1.29 KB | 0644 |
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page.h | File | 660 B | 0644 |
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pgtable.h | File | 483 B | 0644 |
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processor.h | File | 1.52 KB | 0644 |
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swab.h | File | 517 B | 0644 |
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system.h | File | 803 B | 0644 |
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thread_info.h | File | 363 B | 0644 |
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timex.h | File | 852 B | 0644 |
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tlb.h | File | 453 B | 0644 |
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uaccess.h | File | 18.38 KB | 0644 |
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unistd.h | File | 4.58 KB | 0644 |
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