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 
arch_local_save_flags(void)10 static 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 
arch_local_irq_disable(void)17 static 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 
arch_local_irq_enable(void)32 static 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 
arch_local_irq_save(void)54 static 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 
arch_local_irq_restore(unsigned long flags)61 static inline void arch_local_irq_restore(unsigned long flags)
62 {
63 	asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
64 }
65 
arch_irqs_disabled_flags(unsigned long flags)66 static 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 
arch_irqs_disabled(void)75 static 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