1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 *  C6X IRQ flag handling
4 *
5 * Copyright (C) 2010 Texas Instruments Incorporated
6 * Written by Mark Salter (msalter@redhat.com)
7 */
8
9#ifndef _ASM_IRQFLAGS_H
10#define _ASM_IRQFLAGS_H
11
12#ifndef __ASSEMBLY__
13
14/* read interrupt enabled status */
15static inline unsigned long arch_local_save_flags(void)
16{
17	unsigned long flags;
18
19	asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags));
20	return flags;
21}
22
23/* set interrupt enabled status */
24static inline void arch_local_irq_restore(unsigned long flags)
25{
26	asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags) : "memory");
27}
28
29/* unconditionally enable interrupts */
30static inline void arch_local_irq_enable(void)
31{
32	unsigned long flags = arch_local_save_flags();
33	flags |= 1;
34	arch_local_irq_restore(flags);
35}
36
37/* unconditionally disable interrupts */
38static inline void arch_local_irq_disable(void)
39{
40	unsigned long flags = arch_local_save_flags();
41	flags &= ~1;
42	arch_local_irq_restore(flags);
43}
44
45/* get status and disable interrupts */
46static inline unsigned long arch_local_irq_save(void)
47{
48	unsigned long flags;
49
50	flags = arch_local_save_flags();
51	arch_local_irq_restore(flags & ~1);
52	return flags;
53}
54
55/* test flags */
56static inline int arch_irqs_disabled_flags(unsigned long flags)
57{
58	return (flags & 1) == 0;
59}
60
61/* test hardware interrupt enable bit */
62static inline int arch_irqs_disabled(void)
63{
64	return arch_irqs_disabled_flags(arch_local_save_flags());
65}
66
67#endif /* __ASSEMBLY__ */
68#endif /* __ASM_IRQFLAGS_H */
69