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diff --git a/sys/amd64/amd64/in_cksum.c b/sys/amd64/amd64/in_cksum.c
deleted file mode 100644
--- a/sys/amd64/amd64/in_cksum.c
+++ /dev/null
@@ -1,243 +0,0 @@
-/* $NetBSD: in_cksum.c,v 1.7 1997/09/02 13:18:15 thorpej Exp $ */
-
-/*-
- * SPDX-License-Identifier: BSD-4-Clause
- *
- * Copyright (c) 1988, 1992, 1993
- * The Regents of the University of California. All rights reserved.
- * Copyright (c) 1996
- * Matt Thomas <matt@3am-software.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)in_cksum.c 8.1 (Berkeley) 6/10/93
- */
-
-#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/mbuf.h>
-#include <sys/systm.h>
-#include <netinet/in_systm.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#include <machine/in_cksum.h>
-
-/*
- * Checksum routine for Internet Protocol family headers
- * (Portable Alpha version).
- *
- * This routine is very heavily used in the network
- * code and should be modified for each CPU to be as fast as possible.
- */
-
-#define ADDCARRY(x) (x > 65535 ? x -= 65535 : x)
-#define REDUCE32 \
- { \
- q_util.q = sum; \
- sum = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \
- }
-#define REDUCE16 \
- { \
- q_util.q = sum; \
- l_util.l = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \
- sum = l_util.s[0] + l_util.s[1]; \
- ADDCARRY(sum); \
- }
-
-static const u_int32_t in_masks[] = {
- /*0 bytes*/ /*1 byte*/ /*2 bytes*/ /*3 bytes*/
- 0x00000000, 0x000000FF, 0x0000FFFF, 0x00FFFFFF, /* offset 0 */
- 0x00000000, 0x0000FF00, 0x00FFFF00, 0xFFFFFF00, /* offset 1 */
- 0x00000000, 0x00FF0000, 0xFFFF0000, 0xFFFF0000, /* offset 2 */
- 0x00000000, 0xFF000000, 0xFF000000, 0xFF000000, /* offset 3 */
-};
-
-union l_util {
- u_int16_t s[2];
- u_int32_t l;
-};
-union q_util {
- u_int16_t s[4];
- u_int32_t l[2];
- u_int64_t q;
-};
-
-static u_int64_t
-in_cksumdata(const void *buf, int len)
-{
- const u_int32_t *lw = (const u_int32_t *) buf;
- u_int64_t sum = 0;
- u_int64_t prefilled;
- int offset;
- union q_util q_util;
-
- if ((3 & (long) lw) == 0 && len == 20) {
- sum = (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3] + lw[4];
- REDUCE32;
- return sum;
- }
-
- if ((offset = 3 & (long) lw) != 0) {
- const u_int32_t *masks = in_masks + (offset << 2);
- lw = (u_int32_t *) (((long) lw) - offset);
- sum = *lw++ & masks[len >= 3 ? 3 : len];
- len -= 4 - offset;
- if (len <= 0) {
- REDUCE32;
- return sum;
- }
- }
-#if 0
- /*
- * Force to cache line boundary.
- */
- offset = 32 - (0x1f & (long) lw);
- if (offset < 32 && len > offset) {
- len -= offset;
- if (4 & offset) {
- sum += (u_int64_t) lw[0];
- lw += 1;
- }
- if (8 & offset) {
- sum += (u_int64_t) lw[0] + lw[1];
- lw += 2;
- }
- if (16 & offset) {
- sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3];
- lw += 4;
- }
- }
-#endif
- /*
- * access prefilling to start load of next cache line.
- * then add current cache line
- * save result of prefilling for loop iteration.
- */
- prefilled = lw[0];
- while ((len -= 32) >= 4) {
- u_int64_t prefilling = lw[8];
- sum += prefilled + lw[1] + lw[2] + lw[3]
- + lw[4] + lw[5] + lw[6] + lw[7];
- lw += 8;
- prefilled = prefilling;
- }
- if (len >= 0) {
- sum += prefilled + lw[1] + lw[2] + lw[3]
- + lw[4] + lw[5] + lw[6] + lw[7];
- lw += 8;
- } else {
- len += 32;
- }
- while ((len -= 16) >= 0) {
- sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3];
- lw += 4;
- }
- len += 16;
- while ((len -= 4) >= 0) {
- sum += (u_int64_t) *lw++;
- }
- len += 4;
- if (len > 0)
- sum += (u_int64_t) (in_masks[len] & *lw);
- REDUCE32;
- return sum;
-}
-
-u_short
-in_addword(u_short a, u_short b)
-{
- u_int64_t sum = a + b;
-
- ADDCARRY(sum);
- return (sum);
-}
-
-u_short
-in_pseudo(u_int32_t a, u_int32_t b, u_int32_t c)
-{
- u_int64_t sum;
- union q_util q_util;
- union l_util l_util;
-
- sum = (u_int64_t) a + b + c;
- REDUCE16;
- return (sum);
-}
-
-u_short
-in_cksum_skip(struct mbuf *m, int len, int skip)
-{
- u_int64_t sum = 0;
- int mlen = 0;
- int clen = 0;
- caddr_t addr;
- union q_util q_util;
- union l_util l_util;
-
- len -= skip;
- for (; skip && m; m = m->m_next) {
- if (m->m_len > skip) {
- mlen = m->m_len - skip;
- addr = mtod(m, caddr_t) + skip;
- goto skip_start;
- } else {
- skip -= m->m_len;
- }
- }
-
- for (; m && len; m = m->m_next) {
- if (m->m_len == 0)
- continue;
- mlen = m->m_len;
- addr = mtod(m, caddr_t);
-skip_start:
- if (len < mlen)
- mlen = len;
- if ((clen ^ (long) addr) & 1)
- sum += in_cksumdata(addr, mlen) << 8;
- else
- sum += in_cksumdata(addr, mlen);
-
- clen += mlen;
- len -= mlen;
- }
- REDUCE16;
- return (~sum & 0xffff);
-}
-
-u_int in_cksum_hdr(const struct ip *ip)
-{
- u_int64_t sum = in_cksumdata(ip, sizeof(struct ip));
- union q_util q_util;
- union l_util l_util;
- REDUCE16;
- return (~sum & 0xffff);
-}
diff --git a/sys/arm/arm/in_cksum.c b/sys/arm/arm/in_cksum_machdep.c
rename from sys/arm/arm/in_cksum.c
rename to sys/arm/arm/in_cksum_machdep.c
diff --git a/sys/arm/include/in_cksum.h b/sys/arm/include/in_cksum.h
--- a/sys/arm/include/in_cksum.h
+++ b/sys/arm/include/in_cksum.h
@@ -40,6 +40,9 @@
#include <sys/cdefs.h>
#ifdef _KERNEL
+
+#define HAVE_MD_IN_CKSUM
+
u_short in_cksum(struct mbuf *m, int len);
u_short in_addword(u_short sum, u_short b);
u_short in_cksum_skip(struct mbuf *m, int len, int skip);
diff --git a/sys/arm64/arm64/in_cksum.c b/sys/arm64/arm64/in_cksum.c
deleted file mode 100644
--- a/sys/arm64/arm64/in_cksum.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/* $NetBSD: in_cksum.c,v 1.7 1997/09/02 13:18:15 thorpej Exp $ */
-
-/*-
- * Copyright (c) 1988, 1992, 1993
- * The Regents of the University of California. All rights reserved.
- * Copyright (c) 1996
- * Matt Thomas <matt@3am-software.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)in_cksum.c 8.1 (Berkeley) 6/10/93
- */
-
-#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/mbuf.h>
-#include <sys/systm.h>
-#include <netinet/in_systm.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#include <machine/in_cksum.h>
-
-/*
- * Checksum routine for Internet Protocol family headers
- * (Portable Alpha version).
- *
- * This routine is very heavily used in the network
- * code and should be modified for each CPU to be as fast as possible.
- */
-
-#define ADDCARRY(x) (x > 65535 ? x -= 65535 : x)
-#define REDUCE32 \
- { \
- q_util.q = sum; \
- sum = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \
- }
-#define REDUCE16 \
- { \
- q_util.q = sum; \
- l_util.l = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \
- sum = l_util.s[0] + l_util.s[1]; \
- ADDCARRY(sum); \
- }
-
-static const u_int32_t in_masks[] = {
- /*0 bytes*/ /*1 byte*/ /*2 bytes*/ /*3 bytes*/
- 0x00000000, 0x000000FF, 0x0000FFFF, 0x00FFFFFF, /* offset 0 */
- 0x00000000, 0x0000FF00, 0x00FFFF00, 0xFFFFFF00, /* offset 1 */
- 0x00000000, 0x00FF0000, 0xFFFF0000, 0xFFFF0000, /* offset 2 */
- 0x00000000, 0xFF000000, 0xFF000000, 0xFF000000, /* offset 3 */
-};
-
-union l_util {
- u_int16_t s[2];
- u_int32_t l;
-};
-union q_util {
- u_int16_t s[4];
- u_int32_t l[2];
- u_int64_t q;
-};
-
-static u_int64_t
-in_cksumdata(const void *buf, int len)
-{
- const u_int32_t *lw = (const u_int32_t *) buf;
- u_int64_t sum = 0;
- u_int64_t prefilled;
- int offset;
- union q_util q_util;
-
- if ((3 & (long) lw) == 0 && len == 20) {
- sum = (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3] + lw[4];
- REDUCE32;
- return sum;
- }
-
- if ((offset = 3 & (long) lw) != 0) {
- const u_int32_t *masks = in_masks + (offset << 2);
- lw = (u_int32_t *) (((long) lw) - offset);
- sum = *lw++ & masks[len >= 3 ? 3 : len];
- len -= 4 - offset;
- if (len <= 0) {
- REDUCE32;
- return sum;
- }
- }
-#if 0
- /*
- * Force to cache line boundary.
- */
- offset = 32 - (0x1f & (long) lw);
- if (offset < 32 && len > offset) {
- len -= offset;
- if (4 & offset) {
- sum += (u_int64_t) lw[0];
- lw += 1;
- }
- if (8 & offset) {
- sum += (u_int64_t) lw[0] + lw[1];
- lw += 2;
- }
- if (16 & offset) {
- sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3];
- lw += 4;
- }
- }
-#endif
- /*
- * access prefilling to start load of next cache line.
- * then add current cache line
- * save result of prefilling for loop iteration.
- */
- prefilled = lw[0];
- while ((len -= 32) >= 4) {
- u_int64_t prefilling = lw[8];
- sum += prefilled + lw[1] + lw[2] + lw[3]
- + lw[4] + lw[5] + lw[6] + lw[7];
- lw += 8;
- prefilled = prefilling;
- }
- if (len >= 0) {
- sum += prefilled + lw[1] + lw[2] + lw[3]
- + lw[4] + lw[5] + lw[6] + lw[7];
- lw += 8;
- } else {
- len += 32;
- }
- while ((len -= 16) >= 0) {
- sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3];
- lw += 4;
- }
- len += 16;
- while ((len -= 4) >= 0) {
- sum += (u_int64_t) *lw++;
- }
- len += 4;
- if (len > 0)
- sum += (u_int64_t) (in_masks[len] & *lw);
- REDUCE32;
- return sum;
-}
-
-u_short
-in_addword(u_short a, u_short b)
-{
- u_int64_t sum = a + b;
-
- ADDCARRY(sum);
- return (sum);
-}
-
-u_short
-in_pseudo(u_int32_t a, u_int32_t b, u_int32_t c)
-{
- u_int64_t sum;
- union q_util q_util;
- union l_util l_util;
-
- sum = (u_int64_t) a + b + c;
- REDUCE16;
- return (sum);
-}
-
-u_short
-in_cksum_skip(struct mbuf *m, int len, int skip)
-{
- u_int64_t sum = 0;
- int mlen = 0;
- int clen = 0;
- caddr_t addr;
- union q_util q_util;
- union l_util l_util;
-
- len -= skip;
- for (; skip && m; m = m->m_next) {
- if (m->m_len > skip) {
- mlen = m->m_len - skip;
- addr = mtod(m, caddr_t) + skip;
- goto skip_start;
- } else {
- skip -= m->m_len;
- }
- }
-
- for (; m && len; m = m->m_next) {
- if (m->m_len == 0)
- continue;
- mlen = m->m_len;
- addr = mtod(m, caddr_t);
-skip_start:
- if (len < mlen)
- mlen = len;
- if ((clen ^ (long) addr) & 1)
- sum += in_cksumdata(addr, mlen) << 8;
- else
- sum += in_cksumdata(addr, mlen);
-
- clen += mlen;
- len -= mlen;
- }
- REDUCE16;
- return (~sum & 0xffff);
-}
-
-u_int in_cksum_hdr(const struct ip *ip)
-{
- u_int64_t sum = in_cksumdata(ip, sizeof(struct ip));
- union q_util q_util;
- union l_util l_util;
- REDUCE16;
- return (~sum & 0xffff);
-}
diff --git a/sys/conf/files b/sys/conf/files
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -4333,6 +4333,7 @@
netinet/if_ether.c optional inet ether
netinet/igmp.c optional inet
netinet/in.c optional inet
+netinet/in_cksum.c optional inet | inet6
netinet/in_debug.c optional inet ddb
netinet/in_kdtrace.c optional inet | inet6
netinet/ip_carp.c optional inet carp | inet6 carp
diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64
--- a/sys/conf/files.amd64
+++ b/sys/conf/files.amd64
@@ -62,7 +62,6 @@
amd64/amd64/exec_machdep.c standard
amd64/amd64/fpu.c standard
amd64/amd64/gdb_machdep.c optional gdb
-amd64/amd64/in_cksum.c optional inet | inet6
amd64/amd64/initcpu.c standard
amd64/amd64/io.c optional io
amd64/amd64/locore.S standard no-obj
diff --git a/sys/conf/files.arm b/sys/conf/files.arm
--- a/sys/conf/files.arm
+++ b/sys/conf/files.arm
@@ -35,8 +35,8 @@
arm/arm/gic_fdt.c optional gic fdt
arm/arm/gic_if.m optional gic
arm/arm/identcpu-v6.c standard
-arm/arm/in_cksum.c optional inet | inet6
arm/arm/in_cksum_arm.S optional inet | inet6
+arm/arm/in_cksum_machdep.c optional inet | inet6
kern/subr_intr.c standard
arm/arm/locore.S standard no-obj
arm/arm/hypervisor-stub.S standard
diff --git a/sys/conf/files.arm64 b/sys/conf/files.arm64
--- a/sys/conf/files.arm64
+++ b/sys/conf/files.arm64
@@ -56,7 +56,6 @@
arm64/arm64/gic_v3_acpi.c optional acpi
arm64/arm64/gic_v3_fdt.c optional fdt
arm64/arm64/identcpu.c standard
-arm64/arm64/in_cksum.c optional inet | inet6
arm64/arm64/locore.S standard no-obj
arm64/arm64/machdep.c standard
arm64/arm64/machdep_boot.c standard
diff --git a/sys/conf/files.i386 b/sys/conf/files.i386
--- a/sys/conf/files.i386
+++ b/sys/conf/files.i386
@@ -108,7 +108,7 @@
i386/i386/exception.s standard
i386/i386/gdb_machdep.c optional gdb
i386/i386/geode.c optional cpu_geode
-i386/i386/in_cksum.c optional inet | inet6
+i386/i386/in_cksum_machdep.c optional inet | inet6
i386/i386/initcpu.c standard
i386/i386/io.c optional io
i386/i386/k6_mem.c optional mem
diff --git a/sys/conf/files.mips b/sys/conf/files.mips
--- a/sys/conf/files.mips
+++ b/sys/conf/files.mips
@@ -20,7 +20,6 @@
mips/mips/fp.S standard
mips/mips/freebsd32_machdep.c optional compat_freebsd32
mips/mips/gdb_machdep.c standard
-mips/mips/in_cksum.c optional inet
mips/mips/libkern_machdep.c standard
mips/mips/locore.S standard no-obj
mips/mips/machdep.c standard
diff --git a/sys/conf/files.powerpc b/sys/conf/files.powerpc
--- a/sys/conf/files.powerpc
+++ b/sys/conf/files.powerpc
@@ -254,7 +254,6 @@
powerpc/powerpc/exec_machdep.c standard
powerpc/powerpc/fpu.c standard
powerpc/powerpc/gdb_machdep.c optional gdb
-powerpc/powerpc/in_cksum.c optional inet | inet6
powerpc/powerpc/interrupt.c standard
powerpc/powerpc/intr_machdep.c standard
powerpc/powerpc/iommu_if.m standard
diff --git a/sys/conf/files.riscv b/sys/conf/files.riscv
--- a/sys/conf/files.riscv
+++ b/sys/conf/files.riscv
@@ -47,7 +47,6 @@
riscv/riscv/exception.S standard
riscv/riscv/exec_machdep.c standard
riscv/riscv/intr_machdep.c standard
-riscv/riscv/in_cksum.c optional inet | inet6
riscv/riscv/identcpu.c standard
riscv/riscv/locore.S standard no-obj
riscv/riscv/machdep.c standard
diff --git a/sys/i386/i386/in_cksum.c b/sys/i386/i386/in_cksum_machdep.c
rename from sys/i386/i386/in_cksum.c
rename to sys/i386/i386/in_cksum_machdep.c
diff --git a/sys/i386/include/in_cksum.h b/sys/i386/include/in_cksum.h
--- a/sys/i386/include/in_cksum.h
+++ b/sys/i386/include/in_cksum.h
@@ -118,6 +118,9 @@
#endif
#ifdef _KERNEL
+
+#define HAVE_MD_IN_CKSUM
+
#if !defined(__GNUCLIKE_ASM)
#if defined(IPVERSION) && (IPVERSION == 4)
u_int in_cksum_hdr(const struct ip *ip);
diff --git a/sys/mips/mips/in_cksum.c b/sys/netinet/in_cksum.c
rename from sys/mips/mips/in_cksum.c
rename to sys/netinet/in_cksum.c
--- a/sys/mips/mips/in_cksum.c
+++ b/sys/netinet/in_cksum.c
@@ -48,6 +48,11 @@
#include <netinet/ip.h>
#include <machine/in_cksum.h>
+/*
+ * These implementations may be overridden on a per-platform basis.
+ */
+#ifndef HAVE_MD_IN_CKSUM
+
/*
* Checksum routine for Internet Protocol family headers
* (Portable Alpha version).
@@ -248,3 +253,5 @@
REDUCE16;
return (~sum & 0xffff);
}
+
+#endif /* !HAVE_MD_IN_CKSUM */
diff --git a/sys/powerpc/powerpc/in_cksum.c b/sys/powerpc/powerpc/in_cksum.c
deleted file mode 100644
--- a/sys/powerpc/powerpc/in_cksum.c
+++ /dev/null
@@ -1,253 +0,0 @@
-/* $FreeBSD$ */
-/* $NetBSD: in_cksum.c,v 1.7 1997/09/02 13:18:15 thorpej Exp $ */
-
-/*-
- * SPDX-License-Identifier: BSD-4-Clause
- *
- * Copyright (c) 1988, 1992, 1993
- * The Regents of the University of California. All rights reserved.
- * Copyright (c) 1996
- * Matt Thomas <matt@3am-software.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)in_cksum.c 8.1 (Berkeley) 6/10/93
- */
-
-#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
-
-#include <sys/endian.h>
-#include <sys/param.h>
-#include <sys/mbuf.h>
-#include <sys/systm.h>
-#include <netinet/in_systm.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#include <machine/in_cksum.h>
-
-/*
- * Checksum routine for Internet Protocol family headers
- * (Portable Alpha version).
- *
- * This routine is very heavily used in the network
- * code and should be modified for each CPU to be as fast as possible.
- */
-
-#define ADDCARRY(x) (x > 65535 ? x -= 65535 : x)
-#define REDUCE32 \
- { \
- q_util.q = sum; \
- sum = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \
- }
-#define REDUCE16 \
- { \
- q_util.q = sum; \
- l_util.l = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \
- sum = l_util.s[0] + l_util.s[1]; \
- ADDCARRY(sum); \
- }
-
-static const u_int32_t in_masks[] = {
-#if _BYTE_ORDER == _LITTLE_ENDIAN
- /*0 bytes*/ /*1 byte*/ /*2 bytes*/ /*3 bytes*/
- 0x00000000, 0x000000FF, 0x0000FFFF, 0x00FFFFFF, /* offset 0 */
- 0x00000000, 0x0000FF00, 0x00FFFF00, 0xFFFFFF00, /* offset 1 */
- 0x00000000, 0x00FF0000, 0xFFFF0000, 0xFFFF0000, /* offset 2 */
- 0x00000000, 0xFF000000, 0xFF000000, 0xFF000000, /* offset 3 */
-#else
- /*0 bytes*/ /*1 byte*/ /*2 bytes*/ /*3 bytes*/
- 0x00000000, 0xFF000000, 0xFFFF0000, 0xFFFFFF00, /* offset 0 */
- 0x00000000, 0x00FF0000, 0x00FFFF00, 0x00FFFFFF, /* offset 1 */
- 0x00000000, 0x0000FF00, 0x0000FFFF, 0x0000FFFF, /* offset 2 */
- 0x00000000, 0x000000FF, 0x000000FF, 0x000000FF, /* offset 3 */
-#endif
-};
-
-union l_util {
- u_int16_t s[2];
- u_int32_t l;
-};
-union q_util {
- u_int16_t s[4];
- u_int32_t l[2];
- u_int64_t q;
-};
-
-static u_int64_t
-in_cksumdata(const void *buf, int len)
-{
- const u_int32_t *lw = (const u_int32_t *) buf;
- u_int64_t sum = 0;
- u_int64_t prefilled;
- int offset;
- union q_util q_util;
-
- if ((3 & (long) lw) == 0 && len == 20) {
- sum = (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3] + lw[4];
- REDUCE32;
- return sum;
- }
-
- if ((offset = 3 & (long) lw) != 0) {
- const u_int32_t *masks = in_masks + (offset << 2);
- lw = (u_int32_t *) (((long) lw) - offset);
- sum = *lw++ & masks[len >= 3 ? 3 : len];
- len -= 4 - offset;
- if (len <= 0) {
- REDUCE32;
- return sum;
- }
- }
-#if 0
- /*
- * Force to cache line boundary.
- */
- offset = 32 - (0x1f & (long) lw);
- if (offset < 32 && len > offset) {
- len -= offset;
- if (4 & offset) {
- sum += (u_int64_t) lw[0];
- lw += 1;
- }
- if (8 & offset) {
- sum += (u_int64_t) lw[0] + lw[1];
- lw += 2;
- }
- if (16 & offset) {
- sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3];
- lw += 4;
- }
- }
-#endif
- /*
- * access prefilling to start load of next cache line.
- * then add current cache line
- * save result of prefilling for loop iteration.
- */
- prefilled = lw[0];
- while ((len -= 32) >= 4) {
- u_int64_t prefilling = lw[8];
- sum += prefilled + lw[1] + lw[2] + lw[3]
- + lw[4] + lw[5] + lw[6] + lw[7];
- lw += 8;
- prefilled = prefilling;
- }
- if (len >= 0) {
- sum += prefilled + lw[1] + lw[2] + lw[3]
- + lw[4] + lw[5] + lw[6] + lw[7];
- lw += 8;
- } else {
- len += 32;
- }
- while ((len -= 16) >= 0) {
- sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3];
- lw += 4;
- }
- len += 16;
- while ((len -= 4) >= 0) {
- sum += (u_int64_t) *lw++;
- }
- len += 4;
- if (len > 0)
- sum += (u_int64_t) (in_masks[len] & *lw);
- REDUCE32;
- return sum;
-}
-
-u_short
-in_addword(u_short a, u_short b)
-{
- u_int64_t sum = a + b;
-
- ADDCARRY(sum);
- return (sum);
-}
-
-u_short
-in_pseudo(u_int32_t a, u_int32_t b, u_int32_t c)
-{
- u_int64_t sum;
- union q_util q_util;
- union l_util l_util;
-
- sum = (u_int64_t) a + b + c;
- REDUCE16;
- return (sum);
-}
-
-u_short
-in_cksum_skip(struct mbuf *m, int len, int skip)
-{
- u_int64_t sum = 0;
- int mlen = 0;
- int clen = 0;
- caddr_t addr;
- union q_util q_util;
- union l_util l_util;
-
- len -= skip;
- for (; skip && m; m = m->m_next) {
- if (m->m_len > skip) {
- mlen = m->m_len - skip;
- addr = mtod(m, caddr_t) + skip;
- goto skip_start;
- } else {
- skip -= m->m_len;
- }
- }
-
- for (; m && len; m = m->m_next) {
- if (m->m_len == 0)
- continue;
- mlen = m->m_len;
- addr = mtod(m, caddr_t);
-skip_start:
- if (len < mlen)
- mlen = len;
-
- if ((clen ^ (long) addr) & 1)
- sum += in_cksumdata(addr, mlen) << 8;
- else
- sum += in_cksumdata(addr, mlen);
-
- clen += mlen;
- len -= mlen;
- }
- REDUCE16;
- return (~sum & 0xffff);
-}
-
-u_int in_cksum_hdr(const struct ip *ip)
-{
- u_int64_t sum = in_cksumdata(ip, sizeof(struct ip));
- union q_util q_util;
- union l_util l_util;
- REDUCE16;
- return (~sum & 0xffff);
-}
diff --git a/sys/riscv/riscv/in_cksum.c b/sys/riscv/riscv/in_cksum.c
deleted file mode 100644
--- a/sys/riscv/riscv/in_cksum.c
+++ /dev/null
@@ -1,243 +0,0 @@
-/* $NetBSD: in_cksum.c,v 1.7 1997/09/02 13:18:15 thorpej Exp $ */
-
-/*-
- * SPDX-License-Identifier: BSD-4-Clause
- *
- * Copyright (c) 1988, 1992, 1993
- * The Regents of the University of California. All rights reserved.
- * Copyright (c) 1996
- * Matt Thomas <matt@3am-software.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)in_cksum.c 8.1 (Berkeley) 6/10/93
- */
-
-#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/mbuf.h>
-#include <sys/systm.h>
-#include <netinet/in_systm.h>
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#include <machine/in_cksum.h>
-
-/*
- * Checksum routine for Internet Protocol family headers
- * (Portable Alpha version).
- *
- * This routine is very heavily used in the network
- * code and should be modified for each CPU to be as fast as possible.
- */
-
-#define ADDCARRY(x) (x > 65535 ? x -= 65535 : x)
-#define REDUCE32 \
- { \
- q_util.q = sum; \
- sum = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \
- }
-#define REDUCE16 \
- { \
- q_util.q = sum; \
- l_util.l = q_util.s[0] + q_util.s[1] + q_util.s[2] + q_util.s[3]; \
- sum = l_util.s[0] + l_util.s[1]; \
- ADDCARRY(sum); \
- }
-
-static const u_int32_t in_masks[] = {
- /*0 bytes*/ /*1 byte*/ /*2 bytes*/ /*3 bytes*/
- 0x00000000, 0x000000FF, 0x0000FFFF, 0x00FFFFFF, /* offset 0 */
- 0x00000000, 0x0000FF00, 0x00FFFF00, 0xFFFFFF00, /* offset 1 */
- 0x00000000, 0x00FF0000, 0xFFFF0000, 0xFFFF0000, /* offset 2 */
- 0x00000000, 0xFF000000, 0xFF000000, 0xFF000000, /* offset 3 */
-};
-
-union l_util {
- u_int16_t s[2];
- u_int32_t l;
-};
-union q_util {
- u_int16_t s[4];
- u_int32_t l[2];
- u_int64_t q;
-};
-
-static u_int64_t
-in_cksumdata(const void *buf, int len)
-{
- const u_int32_t *lw = (const u_int32_t *) buf;
- u_int64_t sum = 0;
- u_int64_t prefilled;
- int offset;
- union q_util q_util;
-
- if ((3 & (long) lw) == 0 && len == 20) {
- sum = (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3] + lw[4];
- REDUCE32;
- return sum;
- }
-
- if ((offset = 3 & (long) lw) != 0) {
- const u_int32_t *masks = in_masks + (offset << 2);
- lw = (u_int32_t *) (((long) lw) - offset);
- sum = *lw++ & masks[len >= 3 ? 3 : len];
- len -= 4 - offset;
- if (len <= 0) {
- REDUCE32;
- return sum;
- }
- }
-#if 0
- /*
- * Force to cache line boundary.
- */
- offset = 32 - (0x1f & (long) lw);
- if (offset < 32 && len > offset) {
- len -= offset;
- if (4 & offset) {
- sum += (u_int64_t) lw[0];
- lw += 1;
- }
- if (8 & offset) {
- sum += (u_int64_t) lw[0] + lw[1];
- lw += 2;
- }
- if (16 & offset) {
- sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3];
- lw += 4;
- }
- }
-#endif
- /*
- * access prefilling to start load of next cache line.
- * then add current cache line
- * save result of prefilling for loop iteration.
- */
- prefilled = lw[0];
- while ((len -= 32) >= 4) {
- u_int64_t prefilling = lw[8];
- sum += prefilled + lw[1] + lw[2] + lw[3]
- + lw[4] + lw[5] + lw[6] + lw[7];
- lw += 8;
- prefilled = prefilling;
- }
- if (len >= 0) {
- sum += prefilled + lw[1] + lw[2] + lw[3]
- + lw[4] + lw[5] + lw[6] + lw[7];
- lw += 8;
- } else {
- len += 32;
- }
- while ((len -= 16) >= 0) {
- sum += (u_int64_t) lw[0] + lw[1] + lw[2] + lw[3];
- lw += 4;
- }
- len += 16;
- while ((len -= 4) >= 0) {
- sum += (u_int64_t) *lw++;
- }
- len += 4;
- if (len > 0)
- sum += (u_int64_t) (in_masks[len] & *lw);
- REDUCE32;
- return sum;
-}
-
-u_short
-in_addword(u_short a, u_short b)
-{
- u_int64_t sum = a + b;
-
- ADDCARRY(sum);
- return (sum);
-}
-
-u_short
-in_pseudo(u_int32_t a, u_int32_t b, u_int32_t c)
-{
- u_int64_t sum;
- union q_util q_util;
- union l_util l_util;
-
- sum = (u_int64_t) a + b + c;
- REDUCE16;
- return (sum);
-}
-
-u_short
-in_cksum_skip(struct mbuf *m, int len, int skip)
-{
- u_int64_t sum = 0;
- int mlen = 0;
- int clen = 0;
- caddr_t addr;
- union q_util q_util;
- union l_util l_util;
-
- len -= skip;
- for (; skip && m; m = m->m_next) {
- if (m->m_len > skip) {
- mlen = m->m_len - skip;
- addr = mtod(m, caddr_t) + skip;
- goto skip_start;
- } else {
- skip -= m->m_len;
- }
- }
-
- for (; m && len; m = m->m_next) {
- if (m->m_len == 0)
- continue;
- mlen = m->m_len;
- addr = mtod(m, caddr_t);
-skip_start:
- if (len < mlen)
- mlen = len;
- if ((clen ^ (long) addr) & 1)
- sum += in_cksumdata(addr, mlen) << 8;
- else
- sum += in_cksumdata(addr, mlen);
-
- clen += mlen;
- len -= mlen;
- }
- REDUCE16;
- return (~sum & 0xffff);
-}
-
-u_int in_cksum_hdr(const struct ip *ip)
-{
- u_int64_t sum = in_cksumdata(ip, sizeof(struct ip));
- union q_util q_util;
- union l_util l_util;
- REDUCE16;
- return (~sum & 0xffff);
-}

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