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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/sh/include/asm/cmpxchg-llsc.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (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/sh/include/asm/cmpxchg-llsc.h')
-rw-r--r--kernel/arch/sh/include/asm/cmpxchg-llsc.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/kernel/arch/sh/include/asm/cmpxchg-llsc.h b/kernel/arch/sh/include/asm/cmpxchg-llsc.h
new file mode 100644
index 000000000..47136661a
--- /dev/null
+++ b/kernel/arch/sh/include/asm/cmpxchg-llsc.h
@@ -0,0 +1,71 @@
+#ifndef __ASM_SH_CMPXCHG_LLSC_H
+#define __ASM_SH_CMPXCHG_LLSC_H
+
+static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
+{
+ unsigned long retval;
+ unsigned long tmp;
+
+ __asm__ __volatile__ (
+ "1: \n\t"
+ "movli.l @%2, %0 ! xchg_u32 \n\t"
+ "mov %0, %1 \n\t"
+ "mov %3, %0 \n\t"
+ "movco.l %0, @%2 \n\t"
+ "bf 1b \n\t"
+ "synco \n\t"
+ : "=&z"(tmp), "=&r" (retval)
+ : "r" (m), "r" (val)
+ : "t", "memory"
+ );
+
+ return retval;
+}
+
+static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val)
+{
+ unsigned long retval;
+ unsigned long tmp;
+
+ __asm__ __volatile__ (
+ "1: \n\t"
+ "movli.l @%2, %0 ! xchg_u8 \n\t"
+ "mov %0, %1 \n\t"
+ "mov %3, %0 \n\t"
+ "movco.l %0, @%2 \n\t"
+ "bf 1b \n\t"
+ "synco \n\t"
+ : "=&z"(tmp), "=&r" (retval)
+ : "r" (m), "r" (val & 0xff)
+ : "t", "memory"
+ );
+
+ return retval;
+}
+
+static inline unsigned long
+__cmpxchg_u32(volatile int *m, unsigned long old, unsigned long new)
+{
+ unsigned long retval;
+ unsigned long tmp;
+
+ __asm__ __volatile__ (
+ "1: \n\t"
+ "movli.l @%2, %0 ! __cmpxchg_u32 \n\t"
+ "mov %0, %1 \n\t"
+ "cmp/eq %1, %3 \n\t"
+ "bf 2f \n\t"
+ "mov %4, %0 \n\t"
+ "2: \n\t"
+ "movco.l %0, @%2 \n\t"
+ "bf 1b \n\t"
+ "synco \n\t"
+ : "=&z" (tmp), "=&r" (retval)
+ : "r" (m), "r" (old), "r" (new)
+ : "t", "memory"
+ );
+
+ return retval;
+}
+
+#endif /* __ASM_SH_CMPXCHG_LLSC_H */