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
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
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
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
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
61 static inline void arch_local_irq_restore(unsigned long flags)
62 {
63 asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
64 }
65
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
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
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