1 #ifndef _M68K_IRQFLAGS_H
2 #define _M68K_IRQFLAGS_H
3
4 #include <linux/types.h>
5 #ifdef CONFIG_MMU
6 #include <linux/preempt_mask.h>
7 #endif
8 #include <linux/preempt.h>
9 #include <asm/thread_info.h>
10 #include <asm/entry.h>
11
arch_local_save_flags(void)12 static inline unsigned long arch_local_save_flags(void)
13 {
14 unsigned long flags;
15 asm volatile ("movew %%sr,%0" : "=d" (flags) : : "memory");
16 return flags;
17 }
18
arch_local_irq_disable(void)19 static inline void arch_local_irq_disable(void)
20 {
21 #ifdef CONFIG_COLDFIRE
22 asm volatile (
23 "move %/sr,%%d0 \n\t"
24 "ori.l #0x0700,%%d0 \n\t"
25 "move %%d0,%/sr \n"
26 : /* no outputs */
27 :
28 : "cc", "%d0", "memory");
29 #else
30 asm volatile ("oriw #0x0700,%%sr" : : : "memory");
31 #endif
32 }
33
arch_local_irq_enable(void)34 static inline void arch_local_irq_enable(void)
35 {
36 #if defined(CONFIG_COLDFIRE)
37 asm volatile (
38 "move %/sr,%%d0 \n\t"
39 "andi.l #0xf8ff,%%d0 \n\t"
40 "move %%d0,%/sr \n"
41 : /* no outputs */
42 :
43 : "cc", "%d0", "memory");
44 #else
45 # if defined(CONFIG_MMU)
46 if (MACH_IS_Q40 || !hardirq_count())
47 # endif
48 asm volatile (
49 "andiw %0,%%sr"
50 :
51 : "i" (ALLOWINT)
52 : "memory");
53 #endif
54 }
55
arch_local_irq_save(void)56 static inline unsigned long arch_local_irq_save(void)
57 {
58 unsigned long flags = arch_local_save_flags();
59 arch_local_irq_disable();
60 return flags;
61 }
62
arch_local_irq_restore(unsigned long flags)63 static inline void arch_local_irq_restore(unsigned long flags)
64 {
65 asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
66 }
67
arch_irqs_disabled_flags(unsigned long flags)68 static inline bool arch_irqs_disabled_flags(unsigned long flags)
69 {
70 if (MACH_IS_ATARI) {
71 /* Ignore HSYNC = ipl 2 on Atari */
72 return (flags & ~(ALLOWINT | 0x200)) != 0;
73 }
74 return (flags & ~ALLOWINT) != 0;
75 }
76
arch_irqs_disabled(void)77 static inline bool arch_irqs_disabled(void)
78 {
79 return arch_irqs_disabled_flags(arch_local_save_flags());
80 }
81
82 #endif /* _M68K_IRQFLAGS_H */
83