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| author |   Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
| commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
| tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/metag/lib/ip_fast_csum.S | |
| parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) | |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/metag/lib/ip_fast_csum.S')
| -rw-r--r-- | kernel/arch/metag/lib/ip_fast_csum.S | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/kernel/arch/metag/lib/ip_fast_csum.S b/kernel/arch/metag/lib/ip_fast_csum.S new file mode 100644 index 000000000..533b1e73d --- /dev/null +++ b/kernel/arch/metag/lib/ip_fast_csum.S @@ -0,0 +1,32 @@ + + .text +/* + * This is a version of ip_compute_csum() optimized for IP headers, + * which always checksum on 4 octet boundaries. + * + * extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl); + * + */ + .global _ip_fast_csum + .type _ip_fast_csum,function +_ip_fast_csum: + !! TXRPT needs loops - 1 + SUBS TXRPT,D0Ar2,#1 + MOV D0Re0,#0 + BLO $Lfast_csum_exit +$Lfast_csum_loop: + GETD D1Ar3,[D1Ar1++] + ADDS D0Re0,D0Re0,D1Ar3 + ADDCS D0Re0,D0Re0,#1 + BR $Lfast_csum_loop + LSR D0Ar4,D0Re0,#16 + AND D0Re0,D0Re0,#0xffff + AND D0Ar4,D0Ar4,#0xffff + ADD D0Re0,D0Re0,D0Ar4 + LSR D0Ar4,D0Re0,#16 + ADD D0Re0,D0Re0,D0Ar4 + XOR D0Re0,D0Re0,#-1 + AND D0Re0,D0Re0,#0xffff +$Lfast_csum_exit: + MOV PC,D1RtP + .size _ip_fast_csum,.-_ip_fast_csum |