1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _M68K_IRQFLAGS_H
3#define _M68K_IRQFLAGS_H
4
5#include <linux/types.h>
6#include <linux/preempt.h>
7#include <asm/thread_info.h>
8#include <asm/entry.h>
9
10static inline unsigned long arch_local_save_flags(void)
11{
12	unsigned long flags;
13	asm volatile ("movew %%sr,%0" : "=d" (flags) : : "memory");
14	return flags;
15}
16
17static inline void arch_local_irq_disable(void)
18{
19#ifdef CONFIG_COLDFIRE
20	asm volatile (
21		"move	%/sr,%%d0	\n\t"
22		"ori.l	#0x0700,%%d0	\n\t"
23		"move	%%d0,%/sr	\n"
24		: /* no outputs */
25		:
26		: "cc", "%d0", "memory");
27#else
28	asm volatile ("oriw  #0x0700,%%sr" : : : "memory");
29#endif
30}
31
32static inline void arch_local_irq_enable(void)
33{
34#if defined(CONFIG_COLDFIRE)
35	asm volatile (
36		"move	%/sr,%%d0	\n\t"
37		"andi.l	#0xf8ff,%%d0	\n\t"
38		"move	%%d0,%/sr	\n"
39		: /* no outputs */
40		:
41		: "cc", "%d0", "memory");
42#else
43# if defined(CONFIG_MMU)
44	if (MACH_IS_Q40 || !hardirq_count())
45# endif
46		asm volatile (
47			"andiw %0,%%sr"
48			:
49			: "i" (ALLOWINT)
50			: "memory");
51#endif
52}
53
54static inline unsigned long arch_local_irq_save(void)
55{
56	unsigned long flags = arch_local_save_flags();
57	arch_local_irq_disable();
58	return flags;
59}
60
61static inline void arch_local_irq_restore(unsigned long flags)
62{
63	asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
64}
65
66static inline bool arch_irqs_disabled_flags(unsigned long flags)
67{
68	if (MACH_IS_ATARI) {
69		/* Ignore HSYNC = ipl 2 on Atari */
70		return (flags & ~(ALLOWINT | 0x200)) != 0;
71	}
72	return (flags & ~ALLOWINT) != 0;
73}
74
75static inline bool arch_irqs_disabled(void)
76{
77	return arch_irqs_disabled_flags(arch_local_save_flags());
78}
79
80#endif /* _M68K_IRQFLAGS_H */
81