ReactOS  0.4.15-dev-3207-ga415bd4
acgcc.h
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1 /******************************************************************************
2  *
3  * Name: acgcc.h - GCC specific defines, etc.
4  *
5  *****************************************************************************/
6 
7 /*
8  * Copyright (C) 2000 - 2021, Intel Corp.
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  * notice, this list of conditions, and the following disclaimer,
16  * without modification.
17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18  * substantially similar to the "NO WARRANTY" disclaimer below
19  * ("Disclaimer") and any redistribution must be conditioned upon
20  * including a substantially similar Disclaimer requirement for further
21  * binary redistribution.
22  * 3. Neither the names of the above-listed copyright holders nor the names
23  * of any contributors may be used to endorse or promote products derived
24  * from this software without specific prior written permission.
25  *
26  * Alternatively, this software may be distributed under the terms of the
27  * GNU General Public License ("GPL") version 2 as published by the Free
28  * Software Foundation.
29  *
30  * NO WARRANTY
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41  * POSSIBILITY OF SUCH DAMAGES.
42  */
43 
44 #ifndef __ACGCC_H__
45 #define __ACGCC_H__
46 
47 /*
48  * Use compiler specific <stdarg.h> is a good practice for even when
49  * -nostdinc is specified (i.e., ACPI_USE_STANDARD_HEADERS undefined.
50  */
51 #ifndef va_arg
52 #ifdef ACPI_USE_BUILTIN_STDARG
53 typedef __builtin_va_list va_list;
54 #define va_start(v, l) __builtin_va_start(v, l)
55 #define va_end(v) __builtin_va_end(v)
56 #define va_arg(v, l) __builtin_va_arg(v, l)
57 #define va_copy(d, s) __builtin_va_copy(d, s)
58 #else
59 #include <stdarg.h>
60 #endif
61 #endif
62 
63 #define ACPI_INLINE __inline__
64 
65 /* Function name is used for debug output. Non-ANSI, compiler-dependent */
66 
67 #define ACPI_GET_FUNCTION_NAME __func__
68 
69 /*
70  * This macro is used to tag functions as "printf-like" because
71  * some compilers (like GCC) can catch printf format string problems.
72  */
73 #define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1)))
74 
75 /*
76  * Some compilers complain about unused variables. Sometimes we don't want to
77  * use all the variables (for example, _AcpiModuleName). This allows us
78  * to tell the compiler warning in a per-variable manner that a variable
79  * is unused.
80  */
81 #define ACPI_UNUSED_VAR __attribute__ ((unused))
82 
83 /* GCC supports __VA_ARGS__ in macros */
84 
85 #define COMPILER_VA_MACRO 1
86 
87 /* GCC supports native multiply/shift on 32-bit platforms */
88 
89 #define ACPI_USE_NATIVE_MATH64
90 
91 /* GCC did not support __has_attribute until 5.1. */
92 
93 #ifndef __has_attribute
94 #define __has_attribute(x) 0
95 #endif
96 
97 /*
98  * Explicitly mark intentional explicit fallthrough to silence
99  * -Wimplicit-fallthrough in GCC 7.1+.
100  */
101 
102 #if __has_attribute(__fallthrough__)
103 #define ACPI_FALLTHROUGH __attribute__((__fallthrough__))
104 #endif
105 
106 #ifdef __REACTOS__
107 /* Flush CPU cache - used when going to sleep. Wbinvd or similar. */
108 
109 #ifdef ACPI_APPLICATION
110 #define ACPI_FLUSH_CPU_CACHE()
111 #else
112 #define ACPI_FLUSH_CPU_CACHE() asm ("WBINVD")
113 #endif
114 
115 /*
116  * Global Lock acquire/release code
117  *
118  * Note: Handles case where the FACS pointer is null
119  */
120 #define ACPI_ACQUIRE_GLOBAL_LOCK(FacsPtr, Acq) \
121 do { \
122  asm("orl %2,%2;" \
123  "jz 2f;" \
124  "leal 16(%2),%2;" \
125  "1:" \
126  "movl (%2),%%eax;" \
127  "movl %%eax,%%edx;" \
128  "andl %3,%%edx;" \
129  "btsl $0x1,%%edx;" \
130  "adcl $0x0,%%edx;" \
131  "lock; cmpxchgl %%edx,(%2);" \
132  "jnz 1b;" \
133  "cmpb $0x3,%%dl;" \
134  "sbbl %%eax,%%eax;" \
135  "2:" \
136  :"=a"(Acq):"a"(0xFF),"c"(FacsPtr),"i"(~1L):"edx");\
137 } while(0)
138 
139 #define ACPI_RELEASE_GLOBAL_LOCK(FacsPtr, Acq) \
140 do { \
141  asm("orl %2,%2;" \
142  "jz 2f;" \
143  "leal 16(%2),%2;" \
144  "1:" \
145  "movl (%2),%%eax;" \
146  "movl %%eax,%%edx;" \
147  "andl %3,%%edx;" \
148  "lock; cmpxchgl %%edx,(%2);" \
149  "jnz 1b;" \
150  "cmpb $0x3,%%dl;" /* FIXME: this is pointless */ \
151  "andl $0x1,%%eax;" \
152  "2:" \
153  :"=a"(Acq):"a"(0),"c"(FacsPtr),"i"(~3L):"edx");\
154 } while(0)
155 
156 #endif /* __REACTOS__ */
157 #endif /* __ACGCC_H__ */
char * va_list
Definition: acmsvcex.h:78