1 /****************************************************************************** 2 * 3 * Name: acgcc.h - GCC specific defines, etc. 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2022, 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__ */ 158