1 /****************************************************************************** 2 * 3 * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux 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 __ACLINUXEX_H__ 45 #define __ACLINUXEX_H__ 46 47 #ifdef __KERNEL__ 48 49 #ifndef ACPI_USE_NATIVE_DIVIDE 50 51 #ifndef ACPI_DIV_64_BY_32 52 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \ 53 do { \ 54 UINT64 (__n) = ((UINT64) n_hi) << 32 | (n_lo); \ 55 (r32) = do_div ((__n), (d32)); \ 56 (q32) = (UINT32) (__n); \ 57 } while (0) 58 #endif 59 60 #ifndef ACPI_SHIFT_RIGHT_64 61 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \ 62 do { \ 63 (n_lo) >>= 1; \ 64 (n_lo) |= (((n_hi) & 1) << 31); \ 65 (n_hi) >>= 1; \ 66 } while (0) 67 #endif 68 69 #endif 70 71 /* 72 * Overrides for in-kernel ACPICA 73 */ 74 ACPI_STATUS ACPI_INIT_FUNCTION AcpiOsInitialize ( 75 void); 76 77 ACPI_STATUS AcpiOsTerminate ( 78 void); 79 80 /* 81 * The irqs_disabled() check is for resume from RAM. 82 * Interrupts are off during resume, just like they are for boot. 83 * However, boot has (system_state != SYSTEM_RUNNING) 84 * to quiet __might_sleep() in kmalloc() and resume does not. 85 */ 86 static inline void * 87 AcpiOsAllocate ( 88 ACPI_SIZE Size) 89 { 90 return kmalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL); 91 } 92 93 static inline void * 94 AcpiOsAllocateZeroed ( 95 ACPI_SIZE Size) 96 { 97 return kzalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL); 98 } 99 100 static inline void 101 AcpiOsFree ( 102 void *Memory) 103 { 104 kfree (Memory); 105 } 106 107 static inline void * 108 AcpiOsAcquireObject ( 109 ACPI_CACHE_T *Cache) 110 { 111 return kmem_cache_zalloc (Cache, 112 irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL); 113 } 114 115 static inline ACPI_THREAD_ID 116 AcpiOsGetThreadId ( 117 void) 118 { 119 return (ACPI_THREAD_ID) (unsigned long) current; 120 } 121 122 /* 123 * When lockdep is enabled, the spin_lock_init() macro stringifies it's 124 * argument and uses that as a name for the lock in debugging. 125 * By executing spin_lock_init() in a macro the key changes from "lock" for 126 * all locks to the name of the argument of acpi_os_create_lock(), which 127 * prevents lockdep from reporting false positives for ACPICA locks. 128 */ 129 #define AcpiOsCreateLock(__Handle) \ 130 ({ \ 131 spinlock_t *Lock = ACPI_ALLOCATE(sizeof(*Lock)); \ 132 if (Lock) { \ 133 *(__Handle) = Lock; \ 134 spin_lock_init(*(__Handle)); \ 135 } \ 136 Lock ? AE_OK : AE_NO_MEMORY; \ 137 }) 138 139 static inline BOOLEAN 140 AcpiOsReadable ( 141 void *Pointer, 142 ACPI_SIZE Length) 143 { 144 return TRUE; 145 } 146 147 static inline ACPI_STATUS 148 AcpiOsInitializeDebugger ( 149 void) 150 { 151 return AE_OK; 152 } 153 154 static inline void 155 AcpiOsTerminateDebugger ( 156 void) 157 { 158 return; 159 } 160 161 162 /* 163 * OSL interfaces added by Linux 164 */ 165 166 #endif /* __KERNEL__ */ 167 168 #endif /* __ACLINUXEX_H__ */ 169