Commit | Line | Data |
---|---|---|
55f327fa IM |
1 | /* |
2 | * include/asm-i386/irqflags.h | |
3 | * | |
4 | * IRQ flags handling | |
5 | * | |
6 | * This file gets included from lowlevel asm headers too, to provide | |
7 | * wrapped versions of the local_irq_*() APIs, based on the | |
c8558fcd | 8 | * raw_local_irq_*() functions from the lowlevel headers. |
55f327fa IM |
9 | */ |
10 | #ifndef _ASM_IRQFLAGS_H | |
11 | #define _ASM_IRQFLAGS_H | |
b4531e86 | 12 | #include <asm/processor-flags.h> |
55f327fa | 13 | |
90a0a06a RR |
14 | #ifndef __ASSEMBLY__ |
15 | static inline unsigned long native_save_fl(void) | |
16 | { | |
17 | unsigned long f; | |
18 | asm volatile("pushfl ; popl %0":"=g" (f): /* no input */); | |
19 | return f; | |
20 | } | |
21 | ||
22 | static inline void native_restore_fl(unsigned long f) | |
23 | { | |
24 | asm volatile("pushl %0 ; popfl": /* no output */ | |
25 | :"g" (f) | |
26 | :"memory", "cc"); | |
27 | } | |
28 | ||
29 | static inline void native_irq_disable(void) | |
30 | { | |
31 | asm volatile("cli": : :"memory"); | |
32 | } | |
33 | ||
34 | static inline void native_irq_enable(void) | |
35 | { | |
36 | asm volatile("sti": : :"memory"); | |
37 | } | |
38 | ||
39 | static inline void native_safe_halt(void) | |
40 | { | |
41 | asm volatile("sti; hlt": : :"memory"); | |
42 | } | |
43 | ||
44 | static inline void native_halt(void) | |
45 | { | |
46 | asm volatile("hlt": : :"memory"); | |
47 | } | |
48 | #endif /* __ASSEMBLY__ */ | |
49 | ||
d3561b7f RR |
50 | #ifdef CONFIG_PARAVIRT |
51 | #include <asm/paravirt.h> | |
52 | #else | |
c8558fcd | 53 | #ifndef __ASSEMBLY__ |
55f327fa | 54 | |
c8558fcd IM |
55 | static inline unsigned long __raw_local_save_flags(void) |
56 | { | |
90a0a06a | 57 | return native_save_fl(); |
c8558fcd IM |
58 | } |
59 | ||
c8558fcd IM |
60 | static inline void raw_local_irq_restore(unsigned long flags) |
61 | { | |
90a0a06a | 62 | native_restore_fl(flags); |
c8558fcd IM |
63 | } |
64 | ||
65 | static inline void raw_local_irq_disable(void) | |
66 | { | |
90a0a06a | 67 | native_irq_disable(); |
c8558fcd IM |
68 | } |
69 | ||
70 | static inline void raw_local_irq_enable(void) | |
71 | { | |
90a0a06a | 72 | native_irq_enable(); |
c8558fcd IM |
73 | } |
74 | ||
75 | /* | |
76 | * Used in the idle loop; sti takes one instruction cycle | |
77 | * to complete: | |
78 | */ | |
79 | static inline void raw_safe_halt(void) | |
80 | { | |
90a0a06a | 81 | native_safe_halt(); |
c8558fcd IM |
82 | } |
83 | ||
84 | /* | |
85 | * Used when interrupts are already enabled or to | |
86 | * shutdown the processor: | |
87 | */ | |
88 | static inline void halt(void) | |
89 | { | |
90a0a06a | 90 | native_halt(); |
c8558fcd IM |
91 | } |
92 | ||
c8558fcd IM |
93 | /* |
94 | * For spinlocks, etc: | |
95 | */ | |
96 | static inline unsigned long __raw_local_irq_save(void) | |
97 | { | |
98 | unsigned long flags = __raw_local_save_flags(); | |
99 | ||
100 | raw_local_irq_disable(); | |
101 | ||
102 | return flags; | |
103 | } | |
104 | ||
d3561b7f | 105 | #else |
139ec7c4 RR |
106 | #define DISABLE_INTERRUPTS(clobbers) cli |
107 | #define ENABLE_INTERRUPTS(clobbers) sti | |
d3561b7f RR |
108 | #define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit |
109 | #define INTERRUPT_RETURN iret | |
110 | #define GET_CR0_INTO_EAX movl %cr0, %eax | |
111 | #endif /* __ASSEMBLY__ */ | |
112 | #endif /* CONFIG_PARAVIRT */ | |
113 | ||
114 | #ifndef __ASSEMBLY__ | |
115 | #define raw_local_save_flags(flags) \ | |
116 | do { (flags) = __raw_local_save_flags(); } while (0) | |
117 | ||
c8558fcd IM |
118 | #define raw_local_irq_save(flags) \ |
119 | do { (flags) = __raw_local_irq_save(); } while (0) | |
120 | ||
d3561b7f RR |
121 | static inline int raw_irqs_disabled_flags(unsigned long flags) |
122 | { | |
b4531e86 | 123 | return !(flags & X86_EFLAGS_IF); |
d3561b7f RR |
124 | } |
125 | ||
126 | static inline int raw_irqs_disabled(void) | |
127 | { | |
128 | unsigned long flags = __raw_local_save_flags(); | |
129 | ||
130 | return raw_irqs_disabled_flags(flags); | |
131 | } | |
c8558fcd | 132 | #endif /* __ASSEMBLY__ */ |
55f327fa IM |
133 | |
134 | /* | |
135 | * Do the CPU's IRQ-state tracing from assembly code. We call a | |
136 | * C function, so save all the C-clobbered registers: | |
137 | */ | |
138 | #ifdef CONFIG_TRACE_IRQFLAGS | |
139 | ||
140 | # define TRACE_IRQS_ON \ | |
141 | pushl %eax; \ | |
142 | pushl %ecx; \ | |
143 | pushl %edx; \ | |
144 | call trace_hardirqs_on; \ | |
145 | popl %edx; \ | |
146 | popl %ecx; \ | |
147 | popl %eax; | |
148 | ||
149 | # define TRACE_IRQS_OFF \ | |
150 | pushl %eax; \ | |
151 | pushl %ecx; \ | |
152 | pushl %edx; \ | |
153 | call trace_hardirqs_off; \ | |
154 | popl %edx; \ | |
155 | popl %ecx; \ | |
156 | popl %eax; | |
157 | ||
158 | #else | |
159 | # define TRACE_IRQS_ON | |
160 | # define TRACE_IRQS_OFF | |
161 | #endif | |
162 | ||
163 | #endif |