Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_eal / common / include / arch / x86 / rte_rtm.h

diff --git a/lib/librte_eal/common/include/arch/x86/rte_rtm.h b/lib/librte_eal/common/include/arch/x86/rte_rtm.h
new file mode 100644 (file)
index 0000000..d935641
--- /dev/null
+++ b/lib/librte_eal/common/include/arch/x86/rte_rtm.h
@@ -0,0 +1,73 @@
+#ifndef _RTE_RTM_H_
+#define _RTE_RTM_H_ 1
+
+/*
+ * Copyright (c) 2012,2013 Intel Corporation
+ * Author: Andi Kleen
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* Official RTM intrinsics interface matching gcc/icc, but works
+   on older gcc compatible compilers and binutils. */
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#define RTE_XBEGIN_STARTED             (~0u)
+#define RTE_XABORT_EXPLICIT            (1 << 0)
+#define RTE_XABORT_RETRY               (1 << 1)
+#define RTE_XABORT_CONFLICT            (1 << 2)
+#define RTE_XABORT_CAPACITY            (1 << 3)
+#define RTE_XABORT_DEBUG               (1 << 4)
+#define RTE_XABORT_NESTED              (1 << 5)
+#define RTE_XABORT_CODE(x)             (((x) >> 24) & 0xff)
+
+static __attribute__((__always_inline__)) inline
+unsigned int rte_xbegin(void)
+{
+       unsigned int ret = RTE_XBEGIN_STARTED;
+
+       asm volatile(".byte 0xc7,0xf8 ; .long 0" : "+a" (ret) :: "memory");
+       return ret;
+}
+
+static __attribute__((__always_inline__)) inline
+void rte_xend(void)
+{
+        asm volatile(".byte 0x0f,0x01,0xd5" ::: "memory");
+}
+
+static __attribute__((__always_inline__)) inline
+void rte_xabort(const unsigned int status)
+{
+       asm volatile(".byte 0xc6,0xf8,%P0" :: "i" (status) : "memory");
+}
+
+static __attribute__((__always_inline__)) inline
+int rte_xtest(void)
+{
+       unsigned char out;
+
+       asm volatile(".byte 0x0f,0x01,0xd6 ; setnz %0" :
+               "=r" (out) :: "memory");
+       return out;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_RTM_H_ */