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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/metag/include/asm/cmpxchg_lnkget.h | |
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/include/asm/cmpxchg_lnkget.h')
-rw-r--r-- | kernel/arch/metag/include/asm/cmpxchg_lnkget.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/kernel/arch/metag/include/asm/cmpxchg_lnkget.h b/kernel/arch/metag/include/asm/cmpxchg_lnkget.h new file mode 100644 index 000000000..0154e2807 --- /dev/null +++ b/kernel/arch/metag/include/asm/cmpxchg_lnkget.h @@ -0,0 +1,86 @@ +#ifndef __ASM_METAG_CMPXCHG_LNKGET_H +#define __ASM_METAG_CMPXCHG_LNKGET_H + +static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) +{ + int temp, old; + + smp_mb(); + + asm volatile ( + "1: LNKGETD %1, [%2]\n" + " LNKSETD [%2], %3\n" + " DEFR %0, TXSTAT\n" + " ANDT %0, %0, #HI(0x3f000000)\n" + " CMPT %0, #HI(0x02000000)\n" + " BNZ 1b\n" +#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE + " DCACHE [%2], %0\n" +#endif + : "=&d" (temp), "=&d" (old) + : "da" (m), "da" (val) + : "cc" + ); + + smp_mb(); + + return old; +} + +static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) +{ + int temp, old; + + smp_mb(); + + asm volatile ( + "1: LNKGETD %1, [%2]\n" + " LNKSETD [%2], %3\n" + " DEFR %0, TXSTAT\n" + " ANDT %0, %0, #HI(0x3f000000)\n" + " CMPT %0, #HI(0x02000000)\n" + " BNZ 1b\n" +#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE + " DCACHE [%2], %0\n" +#endif + : "=&d" (temp), "=&d" (old) + : "da" (m), "da" (val & 0xff) + : "cc" + ); + + smp_mb(); + + return old; +} + +static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, + unsigned long new) +{ + __u32 retval, temp; + + smp_mb(); + + asm volatile ( + "1: LNKGETD %1, [%2]\n" + " CMP %1, %3\n" + " LNKSETDEQ [%2], %4\n" + " BNE 2f\n" + " DEFR %0, TXSTAT\n" + " ANDT %0, %0, #HI(0x3f000000)\n" + " CMPT %0, #HI(0x02000000)\n" + " BNZ 1b\n" +#ifdef CONFIG_METAG_LNKGET_AROUND_CACHE + " DCACHE [%2], %0\n" +#endif + "2:\n" + : "=&d" (temp), "=&da" (retval) + : "da" (m), "bd" (old), "da" (new) + : "cc" + ); + + smp_mb(); + + return retval; +} + +#endif /* __ASM_METAG_CMPXCHG_LNKGET_H */ |