1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
4  */
5 #ifndef _ASM_IRQFLAGS_H
6 #define _ASM_IRQFLAGS_H
7 
8 #include <asm/registers.h>
9 
arch_local_save_flags(void)10 static inline unsigned long arch_local_save_flags(void)
11 {
12 	return RDCTL(CTL_FSTATUS);
13 }
14 
15 /*
16  * This will restore ALL status register flags, not only the interrupt
17  * mask flag.
18  */
arch_local_irq_restore(unsigned long flags)19 static inline void arch_local_irq_restore(unsigned long flags)
20 {
21 	WRCTL(CTL_FSTATUS, flags);
22 }
23 
arch_local_irq_disable(void)24 static inline void arch_local_irq_disable(void)
25 {
26 	unsigned long flags;
27 
28 	flags = arch_local_save_flags();
29 	arch_local_irq_restore(flags & ~STATUS_PIE);
30 }
31 
arch_local_irq_enable(void)32 static inline void arch_local_irq_enable(void)
33 {
34 	unsigned long flags;
35 
36 	flags = arch_local_save_flags();
37 	arch_local_irq_restore(flags | STATUS_PIE);
38 }
39 
arch_irqs_disabled_flags(unsigned long flags)40 static inline int arch_irqs_disabled_flags(unsigned long flags)
41 {
42 	return (flags & STATUS_PIE) == 0;
43 }
44 
arch_irqs_disabled(void)45 static inline int arch_irqs_disabled(void)
46 {
47 	return arch_irqs_disabled_flags(arch_local_save_flags());
48 }
49 
arch_local_irq_save(void)50 static inline unsigned long arch_local_irq_save(void)
51 {
52 	unsigned long flags;
53 
54 	flags = arch_local_save_flags();
55 	arch_local_irq_restore(flags & ~STATUS_PIE);
56 	return flags;
57 }
58 
59 #endif /* _ASM_IRQFLAGS_H */
60