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