diff options
Diffstat (limited to 'include/asm-i386')
-rw-r--r-- | include/asm-i386/irqflags.h | 95 |
1 files changed, 83 insertions, 12 deletions
diff --git a/include/asm-i386/irqflags.h b/include/asm-i386/irqflags.h index ca777e894c92..e1bdb97c07fa 100644 --- a/include/asm-i386/irqflags.h +++ b/include/asm-i386/irqflags.h | |||
@@ -5,24 +5,95 @@ | |||
5 | * | 5 | * |
6 | * This file gets included from lowlevel asm headers too, to provide | 6 | * This file gets included from lowlevel asm headers too, to provide |
7 | * wrapped versions of the local_irq_*() APIs, based on the | 7 | * wrapped versions of the local_irq_*() APIs, based on the |
8 | * raw_local_irq_*() macros from the lowlevel headers. | 8 | * raw_local_irq_*() functions from the lowlevel headers. |
9 | */ | 9 | */ |
10 | #ifndef _ASM_IRQFLAGS_H | 10 | #ifndef _ASM_IRQFLAGS_H |
11 | #define _ASM_IRQFLAGS_H | 11 | #define _ASM_IRQFLAGS_H |
12 | 12 | ||
13 | #define raw_local_save_flags(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushfl ; popl %0":"=g" (x): /* no input */); } while (0) | 13 | #ifndef __ASSEMBLY__ |
14 | #define raw_local_irq_restore(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushl %0 ; popfl": /* no output */ :"g" (x):"memory", "cc"); } while (0) | ||
15 | #define raw_local_irq_disable() __asm__ __volatile__("cli": : :"memory") | ||
16 | #define raw_local_irq_enable() __asm__ __volatile__("sti": : :"memory") | ||
17 | /* used in the idle loop; sti takes one instruction cycle to complete */ | ||
18 | #define raw_safe_halt() __asm__ __volatile__("sti; hlt": : :"memory") | ||
19 | /* used when interrupts are already enabled or to shutdown the processor */ | ||
20 | #define halt() __asm__ __volatile__("hlt": : :"memory") | ||
21 | 14 | ||
22 | #define raw_irqs_disabled_flags(flags) (!((flags) & (1<<9))) | 15 | static inline unsigned long __raw_local_save_flags(void) |
16 | { | ||
17 | unsigned long flags; | ||
23 | 18 | ||
24 | /* For spinlocks etc */ | 19 | __asm__ __volatile__( |
25 | #define raw_local_irq_save(x) __asm__ __volatile__("pushfl ; popl %0 ; cli":"=g" (x): /* no input */ :"memory") | 20 | "pushfl ; popl %0" |
21 | : "=g" (flags) | ||
22 | : /* no input */ | ||
23 | ); | ||
24 | |||
25 | return flags; | ||
26 | } | ||
27 | |||
28 | #define raw_local_save_flags(flags) \ | ||
29 | do { (flags) = __raw_local_save_flags(); } while (0) | ||
30 | |||
31 | static inline void raw_local_irq_restore(unsigned long flags) | ||
32 | { | ||
33 | __asm__ __volatile__( | ||
34 | "pushl %0 ; popfl" | ||
35 | : /* no output */ | ||
36 | :"g" (flags) | ||
37 | :"memory", "cc" | ||
38 | ); | ||
39 | } | ||
40 | |||
41 | static inline void raw_local_irq_disable(void) | ||
42 | { | ||
43 | __asm__ __volatile__("cli" : : : "memory"); | ||
44 | } | ||
45 | |||
46 | static inline void raw_local_irq_enable(void) | ||
47 | { | ||
48 | __asm__ __volatile__("sti" : : : "memory"); | ||
49 | } | ||
50 | |||
51 | /* | ||
52 | * Used in the idle loop; sti takes one instruction cycle | ||
53 | * to complete: | ||
54 | */ | ||
55 | static inline void raw_safe_halt(void) | ||
56 | { | ||
57 | __asm__ __volatile__("sti; hlt" : : : "memory"); | ||
58 | } | ||
59 | |||
60 | /* | ||
61 | * Used when interrupts are already enabled or to | ||
62 | * shutdown the processor: | ||
63 | */ | ||
64 | static inline void halt(void) | ||
65 | { | ||
66 | __asm__ __volatile__("hlt": : :"memory"); | ||
67 | } | ||
68 | |||
69 | static inline int raw_irqs_disabled_flags(unsigned long flags) | ||
70 | { | ||
71 | return !(flags & (1 << 9)); | ||
72 | } | ||
73 | |||
74 | static inline int raw_irqs_disabled(void) | ||
75 | { | ||
76 | unsigned long flags = __raw_local_save_flags(); | ||
77 | |||
78 | return raw_irqs_disabled_flags(flags); | ||
79 | } | ||
80 | |||
81 | /* | ||
82 | * For spinlocks, etc: | ||
83 | */ | ||
84 | static inline unsigned long __raw_local_irq_save(void) | ||
85 | { | ||
86 | unsigned long flags = __raw_local_save_flags(); | ||
87 | |||
88 | raw_local_irq_disable(); | ||
89 | |||
90 | return flags; | ||
91 | } | ||
92 | |||
93 | #define raw_local_irq_save(flags) \ | ||
94 | do { (flags) = __raw_local_irq_save(); } while (0) | ||
95 | |||
96 | #endif /* __ASSEMBLY__ */ | ||
26 | 97 | ||
27 | /* | 98 | /* |
28 | * Do the CPU's IRQ-state tracing from assembly code. We call a | 99 | * Do the CPU's IRQ-state tracing from assembly code. We call a |