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1ccea77e | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
42a0bb3f PM |
2 | /* |
3 | * internal.h - printk internal definitions | |
42a0bb3f PM |
4 | */ |
5 | #include <linux/percpu.h> | |
6 | ||
099f1c84 SS |
7 | #ifdef CONFIG_PRINTK |
8 | ||
8c4e93c3 PM |
9 | #define PRINTK_SAFE_CONTEXT_MASK 0x007ffffff |
10 | #define PRINTK_NMI_DIRECT_CONTEXT_MASK 0x008000000 | |
11 | #define PRINTK_NMI_CONTEXT_MASK 0xff0000000 | |
12 | ||
13 | #define PRINTK_NMI_CONTEXT_OFFSET 0x010000000 | |
099f1c84 SS |
14 | |
15 | extern raw_spinlock_t logbuf_lock; | |
16 | ||
03fc7f9c PM |
17 | __printf(5, 0) |
18 | int vprintk_store(int facility, int level, | |
19 | const char *dict, size_t dictlen, | |
20 | const char *fmt, va_list args); | |
21 | ||
099f1c84 | 22 | __printf(1, 0) int vprintk_default(const char *fmt, va_list args); |
719f6a70 | 23 | __printf(1, 0) int vprintk_deferred(const char *fmt, va_list args); |
099f1c84 SS |
24 | __printf(1, 0) int vprintk_func(const char *fmt, va_list args); |
25 | void __printk_safe_enter(void); | |
26 | void __printk_safe_exit(void); | |
27 | ||
ab6f762f SS |
28 | void printk_safe_init(void); |
29 | bool printk_percpu_data_ready(void); | |
30 | ||
099f1c84 SS |
31 | #define printk_safe_enter_irqsave(flags) \ |
32 | do { \ | |
33 | local_irq_save(flags); \ | |
34 | __printk_safe_enter(); \ | |
35 | } while (0) | |
36 | ||
37 | #define printk_safe_exit_irqrestore(flags) \ | |
38 | do { \ | |
39 | __printk_safe_exit(); \ | |
40 | local_irq_restore(flags); \ | |
41 | } while (0) | |
42 | ||
43 | #define printk_safe_enter_irq() \ | |
44 | do { \ | |
45 | local_irq_disable(); \ | |
46 | __printk_safe_enter(); \ | |
47 | } while (0) | |
48 | ||
49 | #define printk_safe_exit_irq() \ | |
50 | do { \ | |
51 | __printk_safe_exit(); \ | |
52 | local_irq_enable(); \ | |
53 | } while (0) | |
54 | ||
03fc7f9c PM |
55 | void defer_console_output(void); |
56 | ||
099f1c84 SS |
57 | #else |
58 | ||
59 | __printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; } | |
60 | ||
61 | /* | |
62 | * In !PRINTK builds we still export logbuf_lock spin_lock, console_sem | |
63 | * semaphore and some of console functions (console_unlock()/etc.), so | |
64 | * printk-safe must preserve the existing local IRQ guarantees. | |
65 | */ | |
66 | #define printk_safe_enter_irqsave(flags) local_irq_save(flags) | |
67 | #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags) | |
68 | ||
69 | #define printk_safe_enter_irq() local_irq_disable() | |
70 | #define printk_safe_exit_irq() local_irq_enable() | |
71 | ||
ab6f762f SS |
72 | static inline void printk_safe_init(void) { } |
73 | static inline bool printk_percpu_data_ready(void) { return false; } | |
099f1c84 | 74 | #endif /* CONFIG_PRINTK */ |