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irqflags.h
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1 /*
2  * C6X IRQ flag handling
3  *
4  * Copyright (C) 2010 Texas Instruments Incorporated
5  * Written by Mark Salter ([email protected])
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public Licence
9  * as published by the Free Software Foundation; either version
10  * 2 of the Licence, or (at your option) any later version.
11  */
12 
13 #ifndef _ASM_IRQFLAGS_H
14 #define _ASM_IRQFLAGS_H
15 
16 #ifndef __ASSEMBLY__
17 
18 /* read interrupt enabled status */
19 static inline unsigned long arch_local_save_flags(void)
20 {
21  unsigned long flags;
22 
23  asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags));
24  return flags;
25 }
26 
27 /* set interrupt enabled status */
28 static inline void arch_local_irq_restore(unsigned long flags)
29 {
30  asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags));
31 }
32 
33 /* unconditionally enable interrupts */
34 static inline void arch_local_irq_enable(void)
35 {
36  unsigned long flags = arch_local_save_flags();
37  flags |= 1;
39 }
40 
41 /* unconditionally disable interrupts */
42 static inline void arch_local_irq_disable(void)
43 {
44  unsigned long flags = arch_local_save_flags();
45  flags &= ~1;
47 }
48 
49 /* get status and disable interrupts */
50 static inline unsigned long arch_local_irq_save(void)
51 {
52  unsigned long flags;
53 
54  flags = arch_local_save_flags();
55  arch_local_irq_restore(flags & ~1);
56  return flags;
57 }
58 
59 /* test flags */
60 static inline int arch_irqs_disabled_flags(unsigned long flags)
61 {
62  return (flags & 1) == 0;
63 }
64 
65 /* test hardware interrupt enable bit */
66 static inline int arch_irqs_disabled(void)
67 {
69 }
70 
71 #endif /* __ASSEMBLY__ */
72 #endif /* __ASM_IRQFLAGS_H */