1/*
2 * Copyright 2013-2015 Samy Al Bahra.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Copyright (c) 2012,2013 Intel Corporation
29 * Author: Andi Kleen
30 *
31 * Redistribution and use in source and binary forms, with or without
32 * modification, are permitted provided that: (1) source code distributions
33 * retain the above copyright notice and this paragraph in its entirety, (2)
34 * distributions including binary code include the above copyright notice and
35 * this paragraph in its entirety in the documentation or other materials
36 * provided with the distribution
37 *
38 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
39 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
40 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
41 */
42
43#ifndef CK_PR_X86_64_RTM_H
44#define CK_PR_X86_64_RTM_H
45
46#ifndef CK_PR_X86_64_H
47#error Do not include this file directly, use ck_pr.h
48#endif
49
50#define CK_F_PR_RTM
51
52#include <ck_cc.h>
53#include <ck_stdbool.h>
54
55#define CK_PR_RTM_STARTED	(~0U)
56#define CK_PR_RTM_EXPLICIT	(1 << 0)
57#define CK_PR_RTM_RETRY		(1 << 1)
58#define CK_PR_RTM_CONFLICT	(1 << 2)
59#define CK_PR_RTM_CAPACITY	(1 << 3)
60#define CK_PR_RTM_DEBUG		(1 << 4)
61#define CK_PR_RTM_NESTED	(1 << 5)
62#define CK_PR_RTM_CODE(x)	(((x) >> 24) & 0xFF)
63
64CK_CC_INLINE static unsigned int
65ck_pr_rtm_begin(void)
66{
67	unsigned int r = CK_PR_RTM_STARTED;
68
69	__asm__ __volatile__(".byte 0xc7,0xf8;"
70			     ".long 0;"
71				: "+a" (r)
72				:
73				: "memory");
74
75	return r;
76}
77
78CK_CC_INLINE static void
79ck_pr_rtm_end(void)
80{
81
82	__asm__ __volatile__(".byte 0x0f,0x01,0xd5" ::: "memory");
83	return;
84}
85
86CK_CC_INLINE static void
87ck_pr_rtm_abort(const unsigned int status)
88{
89
90	__asm__ __volatile__(".byte 0xc6,0xf8,%P0" :: "i" (status) : "memory");
91	return;
92}
93
94CK_CC_INLINE static bool
95ck_pr_rtm_test(void)
96{
97	bool r;
98
99	__asm__ __volatile__(".byte 0x0f,0x01,0xd6;"
100			     "setnz %0"
101				: "=r" (r)
102				:
103				: "memory");
104
105	return r;
106}
107
108#endif /* CK_PR_X86_64_RTM_H */
109
110