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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 | /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ /****************************************************************************** * * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux * * Copyright (C) 2000 - 2022, Intel Corp. * *****************************************************************************/ #ifndef __ACLINUXEX_H__ #define __ACLINUXEX_H__ #ifdef __KERNEL__ #ifndef ACPI_USE_NATIVE_DIVIDE #ifndef ACPI_DIV_64_BY_32 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \ do { \ u64 (__n) = ((u64) n_hi) << 32 | (n_lo); \ (r32) = do_div ((__n), (d32)); \ (q32) = (u32) (__n); \ } while (0) #endif #ifndef ACPI_SHIFT_RIGHT_64 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \ do { \ (n_lo) >>= 1; \ (n_lo) |= (((n_hi) & 1) << 31); \ (n_hi) >>= 1; \ } while (0) #endif #endif /* * Overrides for in-kernel ACPICA */ acpi_status ACPI_INIT_FUNCTION acpi_os_initialize(void); acpi_status acpi_os_terminate(void); /* * The irqs_disabled() check is for resume from RAM. * Interrupts are off during resume, just like they are for boot. * However, boot has (system_state != SYSTEM_RUNNING) * to quiet __might_sleep() in kmalloc() and resume does not. */ static inline void *acpi_os_allocate(acpi_size size) { return kmalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); } static inline void *acpi_os_allocate_zeroed(acpi_size size) { return kzalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); } static inline void acpi_os_free(void *memory) { kfree(memory); } static inline void *acpi_os_acquire_object(acpi_cache_t * cache) { return kmem_cache_zalloc(cache, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); } static inline acpi_thread_id acpi_os_get_thread_id(void) { return (acpi_thread_id) (unsigned long)current; } /* * When lockdep is enabled, the spin_lock_init() macro stringifies it's * argument and uses that as a name for the lock in debugging. * By executing spin_lock_init() in a macro the key changes from "lock" for * all locks to the name of the argument of acpi_os_create_lock(), which * prevents lockdep from reporting false positives for ACPICA locks. */ #define acpi_os_create_lock(__handle) \ ({ \ spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ if (lock) { \ *(__handle) = lock; \ spin_lock_init(*(__handle)); \ } \ lock ? AE_OK : AE_NO_MEMORY; \ }) #define acpi_os_create_raw_lock(__handle) \ ({ \ raw_spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ if (lock) { \ *(__handle) = lock; \ raw_spin_lock_init(*(__handle)); \ } \ lock ? AE_OK : AE_NO_MEMORY; \ }) static inline acpi_cpu_flags acpi_os_acquire_raw_lock(acpi_raw_spinlock lockp) { acpi_cpu_flags flags; raw_spin_lock_irqsave(lockp, flags); return flags; } static inline void acpi_os_release_raw_lock(acpi_raw_spinlock lockp, acpi_cpu_flags flags) { raw_spin_unlock_irqrestore(lockp, flags); } static inline void acpi_os_delete_raw_lock(acpi_raw_spinlock handle) { ACPI_FREE(handle); } static inline u8 acpi_os_readable(void *pointer, acpi_size length) { return TRUE; } static inline acpi_status acpi_os_initialize_debugger(void) { return AE_OK; } static inline void acpi_os_terminate_debugger(void) { return; } /* * OSL interfaces added by Linux */ #endif /* __KERNEL__ */ #endif /* __ACLINUXEX_H__ */ |