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https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-10-31 08:08:51 +01:00
Fixed MTP to work with TWRP
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awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
204
arch/m32r/include/asm/checksum.h
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204
arch/m32r/include/asm/checksum.h
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#ifdef __KERNEL__
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#ifndef _ASM_M32R_CHECKSUM_H
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#define _ASM_M32R_CHECKSUM_H
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/*
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* include/asm-m32r/checksum.h
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*
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* IP/TCP/UDP checksum routines
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Some code taken from mips and parisc architecture.
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*
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* Copyright (C) 2001, 2002 Hiroyuki Kondo, Hirokazu Takata
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* Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
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*/
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#include <linux/in6.h>
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/*
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* computes the checksum of a memory block at buff, length len,
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* and adds in "sum" (32-bit)
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*
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* returns a 32-bit number suitable for feeding into itself
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* or csum_tcpudp_magic
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*
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* this function must be called with even lengths, except
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* for the last fragment, which may be odd
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*
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* it's best to have buff aligned on a 32-bit boundary
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*/
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asmlinkage __wsum csum_partial(const void *buff, int len, __wsum sum);
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/*
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* The same as csum_partial, but copies from src while it checksums.
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*
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* Here even more important to align src and dst on a 32-bit (or even
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* better 64-bit) boundary
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*/
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extern __wsum csum_partial_copy_nocheck(const void *src, void *dst,
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int len, __wsum sum);
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/*
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* This is a new version of the above that records errors it finds in *errp,
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* but continues and zeros thre rest of the buffer.
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*/
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extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
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int len, __wsum sum,
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int *err_ptr);
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/*
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* Fold a partial checksum
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*/
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static inline __sum16 csum_fold(__wsum sum)
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{
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unsigned long tmpreg;
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__asm__(
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" sll3 %1, %0, #16 \n"
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" cmp %0, %0 \n"
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" addx %0, %1 \n"
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" ldi %1, #0 \n"
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" srli %0, #16 \n"
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" addx %0, %1 \n"
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" xor3 %0, %0, #0x0000ffff \n"
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: "=r" (sum), "=&r" (tmpreg)
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: "0" (sum)
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: "cbit"
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);
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return (__force __sum16)sum;
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}
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/*
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* This is a version of ip_compute_csum() optimized for IP headers,
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* which always checksum on 4 octet boundaries.
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*/
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static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
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{
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unsigned long tmpreg0, tmpreg1;
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__wsum sum;
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__asm__ __volatile__(
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" ld %0, @%1+ \n"
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" addi %2, #-4 \n"
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"# bgez %2, 2f \n"
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" cmp %0, %0 \n"
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" ld %3, @%1+ \n"
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" ld %4, @%1+ \n"
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" addx %0, %3 \n"
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" ld %3, @%1+ \n"
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" addx %0, %4 \n"
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" addx %0, %3 \n"
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" .fillinsn\n"
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"1: \n"
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" ld %4, @%1+ \n"
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" addi %2, #-1 \n"
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" addx %0, %4 \n"
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" bgtz %2, 1b \n"
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"\n"
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" ldi %3, #0 \n"
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" addx %0, %3 \n"
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" .fillinsn\n"
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"2: \n"
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/* Since the input registers which are loaded with iph and ihl
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are modified, we must also specify them as outputs, or gcc
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will assume they contain their original values. */
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: "=&r" (sum), "=r" (iph), "=r" (ihl), "=&r" (tmpreg0), "=&r" (tmpreg1)
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: "1" (iph), "2" (ihl)
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: "cbit", "memory");
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return csum_fold(sum);
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}
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static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
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unsigned short len,
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unsigned short proto,
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__wsum sum)
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{
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#if defined(__LITTLE_ENDIAN)
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unsigned long len_proto = (proto + len) << 8;
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#else
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unsigned long len_proto = proto + len;
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#endif
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unsigned long tmpreg;
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__asm__(
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" cmp %0, %0 \n"
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" addx %0, %2 \n"
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" addx %0, %3 \n"
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" addx %0, %4 \n"
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" ldi %1, #0 \n"
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" addx %0, %1 \n"
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: "=r" (sum), "=&r" (tmpreg)
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: "r" (daddr), "r" (saddr), "r" (len_proto), "0" (sum)
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: "cbit"
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);
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return sum;
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}
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/*
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* computes the checksum of the TCP/UDP pseudo-header
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* returns a 16-bit checksum, already complemented
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*/
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static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
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unsigned short len,
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unsigned short proto,
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__wsum sum)
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{
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return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
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}
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/*
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* this routine is used for miscellaneous IP-like checksums, mainly
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* in icmp.c
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*/
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static inline __sum16 ip_compute_csum(const void *buff, int len)
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{
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return csum_fold (csum_partial(buff, len, 0));
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}
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#define _HAVE_ARCH_IPV6_CSUM
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static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
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const struct in6_addr *daddr,
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__u32 len, unsigned short proto,
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__wsum sum)
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{
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unsigned long tmpreg0, tmpreg1, tmpreg2, tmpreg3;
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__asm__(
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" ld %1, @(%5) \n"
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" ld %2, @(4,%5) \n"
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" ld %3, @(8,%5) \n"
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" ld %4, @(12,%5) \n"
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" add %0, %1 \n"
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" addx %0, %2 \n"
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" addx %0, %3 \n"
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" addx %0, %4 \n"
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" ld %1, @(%6) \n"
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" ld %2, @(4,%6) \n"
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" ld %3, @(8,%6) \n"
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" ld %4, @(12,%6) \n"
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" addx %0, %1 \n"
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" addx %0, %2 \n"
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" addx %0, %3 \n"
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" addx %0, %4 \n"
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" addx %0, %7 \n"
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" addx %0, %8 \n"
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" ldi %1, #0 \n"
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" addx %0, %1 \n"
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: "=&r" (sum), "=&r" (tmpreg0), "=&r" (tmpreg1),
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"=&r" (tmpreg2), "=&r" (tmpreg3)
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: "r" (saddr), "r" (daddr),
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"r" (htonl(len)), "r" (htonl(proto)), "0" (sum)
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: "cbit"
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);
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return csum_fold(sum);
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}
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#endif /* _ASM_M32R_CHECKSUM_H */
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#endif /* __KERNEL__ */
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