1 /****************************************************************************** 2 * 3 * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2014, 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 MERCHANTIBILITY 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 u64 (__n) = ((u64) n_hi) << 32 | (n_lo); \ 55 (r32) = do_div ((__n), (d32)); \ 56 (q32) = (u32) (__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 __init acpi_os_initialize(void); 75 76 acpi_status acpi_os_terminate(void); 77 78 /* 79 * The irqs_disabled() check is for resume from RAM. 80 * Interrupts are off during resume, just like they are for boot. 81 * However, boot has (system_state != SYSTEM_RUNNING) 82 * to quiet __might_sleep() in kmalloc() and resume does not. 83 */ 84 static inline void *acpi_os_allocate(acpi_size size) 85 { 86 return kmalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); 87 } 88 89 static inline void *acpi_os_allocate_zeroed(acpi_size size) 90 { 91 return kzalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); 92 } 93 94 static inline void acpi_os_free(void *memory) 95 { 96 kfree(memory); 97 } 98 99 static inline void *acpi_os_acquire_object(acpi_cache_t * cache) 100 { 101 return kmem_cache_zalloc(cache, 102 irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); 103 } 104 105 static inline acpi_thread_id acpi_os_get_thread_id(void) 106 { 107 return (acpi_thread_id) (unsigned long)current; 108 } 109 110 /* 111 * When lockdep is enabled, the spin_lock_init() macro stringifies it's 112 * argument and uses that as a name for the lock in debugging. 113 * By executing spin_lock_init() in a macro the key changes from "lock" for 114 * all locks to the name of the argument of acpi_os_create_lock(), which 115 * prevents lockdep from reporting false positives for ACPICA locks. 116 */ 117 #define acpi_os_create_lock(__handle) \ 118 ({ \ 119 spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ 120 if (lock) { \ 121 *(__handle) = lock; \ 122 spin_lock_init(*(__handle)); \ 123 } \ 124 lock ? AE_OK : AE_NO_MEMORY; \ 125 }) 126 127 /* 128 * OSL interfaces added by Linux 129 */ 130 void early_acpi_os_unmap_memory(void __iomem * virt, acpi_size size); 131 132 #endif /* __KERNEL__ */ 133 134 #endif /* __ACLINUXEX_H__ */ 135