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 | static inline void *acpi_os_allocate(acpi_size size) |
51 | { |
52 | return kmalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); |
53 | } |
54 | |
55 | static inline void *acpi_os_allocate_zeroed(acpi_size size) |
56 | { |
57 | return kzalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); |
58 | } |
59 | |
60 | static inline void acpi_os_free(void *memory) |
61 | { |
62 | kfree(objp: memory); |
63 | } |
64 | |
65 | static inline void *acpi_os_acquire_object(acpi_cache_t * cache) |
66 | { |
67 | return kmem_cache_zalloc(k: cache, |
68 | irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); |
69 | } |
70 | |
71 | static inline acpi_thread_id acpi_os_get_thread_id(void) |
72 | { |
73 | return (acpi_thread_id) (unsigned long)current; |
74 | } |
75 | |
76 | /* |
77 | * When lockdep is enabled, the spin_lock_init() macro stringifies it's |
78 | * argument and uses that as a name for the lock in debugging. |
79 | * By executing spin_lock_init() in a macro the key changes from "lock" for |
80 | * all locks to the name of the argument of acpi_os_create_lock(), which |
81 | * prevents lockdep from reporting false positives for ACPICA locks. |
82 | */ |
83 | #define acpi_os_create_lock(__handle) \ |
84 | ({ \ |
85 | spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ |
86 | if (lock) { \ |
87 | *(__handle) = lock; \ |
88 | spin_lock_init(*(__handle)); \ |
89 | } \ |
90 | lock ? AE_OK : AE_NO_MEMORY; \ |
91 | }) |
92 | |
93 | |
94 | #define acpi_os_create_raw_lock(__handle) \ |
95 | ({ \ |
96 | raw_spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ |
97 | if (lock) { \ |
98 | *(__handle) = lock; \ |
99 | raw_spin_lock_init(*(__handle)); \ |
100 | } \ |
101 | lock ? AE_OK : AE_NO_MEMORY; \ |
102 | }) |
103 | |
104 | static inline acpi_cpu_flags acpi_os_acquire_raw_lock(acpi_raw_spinlock lockp) |
105 | { |
106 | acpi_cpu_flags flags; |
107 | |
108 | raw_spin_lock_irqsave(lockp, flags); |
109 | return flags; |
110 | } |
111 | |
112 | static inline void acpi_os_release_raw_lock(acpi_raw_spinlock lockp, |
113 | acpi_cpu_flags flags) |
114 | { |
115 | raw_spin_unlock_irqrestore(lockp, flags); |
116 | } |
117 | |
118 | static inline void acpi_os_delete_raw_lock(acpi_raw_spinlock handle) |
119 | { |
120 | ACPI_FREE(handle); |
121 | } |
122 | |
123 | static inline u8 acpi_os_readable(void *pointer, acpi_size length) |
124 | { |
125 | return TRUE; |
126 | } |
127 | |
128 | static inline acpi_status acpi_os_initialize_debugger(void) |
129 | { |
130 | return AE_OK; |
131 | } |
132 | |
133 | static inline void acpi_os_terminate_debugger(void) |
134 | { |
135 | return; |
136 | } |
137 | |
138 | /* |
139 | * OSL interfaces added by Linux |
140 | */ |
141 | |
142 | #endif /* __KERNEL__ */ |
143 | |
144 | #endif /* __ACLINUXEX_H__ */ |
145 | |