2 * include/asm-x86_64/irqflags.h
6 * This file gets included from lowlevel asm headers too, to provide
7 * wrapped versions of the local_irq_*() APIs, based on the
8 * raw_local_irq_*() functions from the lowlevel headers.
10 #ifndef _ASM_IRQFLAGS_H
11 #define _ASM_IRQFLAGS_H
12 #include <asm/processor-flags.h>
19 static inline unsigned long __raw_local_save_flags(void)
24 "# __raw_save_flags\n\t"
34 #define raw_local_save_flags(flags) \
35 do { (flags) = __raw_local_save_flags(); } while (0)
37 static inline void raw_local_irq_restore(unsigned long flags)
47 #ifdef CONFIG_X86_VSMP
50 * Interrupt control for the VSMP architecture:
53 static inline void raw_local_irq_disable(void)
55 unsigned long flags = __raw_local_save_flags();
57 raw_local_irq_restore((flags & ~X86_EFLAGS_IF) | X86_EFLAGS_AC);
60 static inline void raw_local_irq_enable(void)
62 unsigned long flags = __raw_local_save_flags();
64 raw_local_irq_restore((flags | X86_EFLAGS_IF) & (~X86_EFLAGS_AC));
67 static inline int raw_irqs_disabled_flags(unsigned long flags)
69 return !(flags & X86_EFLAGS_IF) || (flags & X86_EFLAGS_AC);
72 #else /* CONFIG_X86_VSMP */
74 static inline void raw_local_irq_disable(void)
76 __asm__ __volatile__("cli" : : : "memory");
79 static inline void raw_local_irq_enable(void)
81 __asm__ __volatile__("sti" : : : "memory");
84 static inline int raw_irqs_disabled_flags(unsigned long flags)
86 return !(flags & X86_EFLAGS_IF);
92 * For spinlocks, etc.:
95 static inline unsigned long __raw_local_irq_save(void)
97 unsigned long flags = __raw_local_save_flags();
99 raw_local_irq_disable();
104 #define raw_local_irq_save(flags) \
105 do { (flags) = __raw_local_irq_save(); } while (0)
107 static inline int raw_irqs_disabled(void)
109 unsigned long flags = __raw_local_save_flags();
111 return raw_irqs_disabled_flags(flags);
115 * makes the traced hardirq state match with the machine state
117 * should be a rarely used function, only in places where its
118 * otherwise impossible to know the irq state, like in traps.
120 static inline void trace_hardirqs_fixup_flags(unsigned long flags)
122 if (raw_irqs_disabled_flags(flags))
123 trace_hardirqs_off();
128 static inline void trace_hardirqs_fixup(void)
130 unsigned long flags = __raw_local_save_flags();
132 trace_hardirqs_fixup_flags(flags);
135 * Used in the idle loop; sti takes one instruction cycle
138 static inline void raw_safe_halt(void)
140 __asm__ __volatile__("sti; hlt" : : : "memory");
144 * Used when interrupts are already enabled or to
145 * shutdown the processor:
147 static inline void halt(void)
149 __asm__ __volatile__("hlt": : :"memory");
152 #else /* __ASSEMBLY__: */
153 # ifdef CONFIG_TRACE_IRQFLAGS
154 # define TRACE_IRQS_ON call trace_hardirqs_on_thunk
155 # define TRACE_IRQS_OFF call trace_hardirqs_off_thunk
157 # define TRACE_IRQS_ON
158 # define TRACE_IRQS_OFF
160 # ifdef CONFIG_DEBUG_LOCK_ALLOC
161 # define LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk
162 # define LOCKDEP_SYS_EXIT_IRQ \
171 # define LOCKDEP_SYS_EXIT
172 # define LOCKDEP_SYS_EXIT_IRQ