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-rw-r--r--include/asm-i386/irqflags.h95
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))) 15static 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
31static 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
41static inline void raw_local_irq_disable(void)
42{
43 __asm__ __volatile__("cli" : : : "memory");
44}
45
46static 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 */
55static 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 */
64static inline void halt(void)
65{
66 __asm__ __volatile__("hlt": : :"memory");
67}
68
69static inline int raw_irqs_disabled_flags(unsigned long flags)
70{
71 return !(flags & (1 << 9));
72}
73
74static 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 */
84static 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