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
64 CK_CC_INLINE static unsigned int
ck_pr_rtm_begin(void)65 ck_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
78 CK_CC_INLINE static void
ck_pr_rtm_end(void)79 ck_pr_rtm_end(void)
80 {
81
82 __asm__ __volatile__(".byte 0x0f,0x01,0xd5" ::: "memory");
83 return;
84 }
85
86 CK_CC_INLINE static void
ck_pr_rtm_abort(const unsigned int status)87 ck_pr_rtm_abort(const unsigned int status)
88 {
89
90 __asm__ __volatile__(".byte 0xc6,0xf8,%P0" :: "i" (status) : "memory");
91 return;
92 }
93
94 CK_CC_INLINE static bool
ck_pr_rtm_test(void)95 ck_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