1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ 2 /****************************************************************************** 3 * 4 * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux 5 * 6 * Copyright (C) 2000 - 2023, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #ifndef __ACLINUXEX_H__ 11 #define __ACLINUXEX_H__ 12 13 #ifdef __KERNEL__ 14 15 #ifndef ACPI_USE_NATIVE_DIVIDE 16 17 #ifndef ACPI_DIV_64_BY_32 18 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \ 19 do { \ 20 u64 (__n) = ((u64) n_hi) << 32 | (n_lo); \ 21 (r32) = do_div ((__n), (d32)); \ 22 (q32) = (u32) (__n); \ 23 } while (0) 24 #endif 25 26 #ifndef ACPI_SHIFT_RIGHT_64 27 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \ 28 do { \ 29 (n_lo) >>= 1; \ 30 (n_lo) |= (((n_hi) & 1) << 31); \ 31 (n_hi) >>= 1; \ 32 } while (0) 33 #endif 34 35 #endif 36 37 /* 38 * Overrides for in-kernel ACPICA 39 */ 40 acpi_status ACPI_INIT_FUNCTION acpi_os_initialize(void); 41 42 acpi_status acpi_os_terminate(void); 43 44 /* 45 * The irqs_disabled() check is for resume from RAM. 46 * Interrupts are off during resume, just like they are for boot. 47 * However, boot has (system_state != SYSTEM_RUNNING) 48 * to quiet __might_sleep() in kmalloc() and resume does not. 49 */ 50 #define acpi_os_allocate(_size) \ 51 kmalloc(_size, irqs_disabled() ? GFP_ATOMIC : GFP_KERNEL) 52 53 #define acpi_os_allocate_zeroed(_size) \ 54 kzalloc(_size, irqs_disabled() ? GFP_ATOMIC : GFP_KERNEL) 55 56 static inline void acpi_os_free(void *memory) 57 { 58 kfree(memory); 59 } 60 61 #define acpi_os_acquire_object(_cache) \ 62 kmem_cache_zalloc(_cache, irqs_disabled() ? GFP_ATOMIC : GFP_KERNEL) 63 64 static inline acpi_thread_id acpi_os_get_thread_id(void) 65 { 66 return (acpi_thread_id) (unsigned long)current; 67 } 68 69 /* 70 * When lockdep is enabled, the spin_lock_init() macro stringifies it's 71 * argument and uses that as a name for the lock in debugging. 72 * By executing spin_lock_init() in a macro the key changes from "lock" for 73 * all locks to the name of the argument of acpi_os_create_lock(), which 74 * prevents lockdep from reporting false positives for ACPICA locks. 75 */ 76 #define acpi_os_create_lock(__handle) \ 77 ({ \ 78 spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ 79 if (lock) { \ 80 *(__handle) = lock; \ 81 spin_lock_init(*(__handle)); \ 82 } \ 83 lock ? AE_OK : AE_NO_MEMORY; \ 84 }) 85 86 87 #define acpi_os_create_raw_lock(__handle) \ 88 ({ \ 89 raw_spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ 90 if (lock) { \ 91 *(__handle) = lock; \ 92 raw_spin_lock_init(*(__handle)); \ 93 } \ 94 lock ? AE_OK : AE_NO_MEMORY; \ 95 }) 96 97 static inline acpi_cpu_flags acpi_os_acquire_raw_lock(acpi_raw_spinlock lockp) 98 { 99 acpi_cpu_flags flags; 100 101 raw_spin_lock_irqsave(lockp, flags); 102 return flags; 103 } 104 105 static inline void acpi_os_release_raw_lock(acpi_raw_spinlock lockp, 106 acpi_cpu_flags flags) 107 { 108 raw_spin_unlock_irqrestore(lockp, flags); 109 } 110 111 static inline void acpi_os_delete_raw_lock(acpi_raw_spinlock handle) 112 { 113 ACPI_FREE(handle); 114 } 115 116 static inline u8 acpi_os_readable(void *pointer, acpi_size length) 117 { 118 return TRUE; 119 } 120 121 static inline acpi_status acpi_os_initialize_debugger(void) 122 { 123 return AE_OK; 124 } 125 126 static inline void acpi_os_terminate_debugger(void) 127 { 128 return; 129 } 130 131 /* 132 * OSL interfaces added by Linux 133 */ 134 135 #endif /* __KERNEL__ */ 136 137 #endif /* __ACLINUXEX_H__ */ 138