62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
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/*
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* include/asm-x86_64/irqflags.h
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*
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* IRQ flags handling
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*
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* This file gets included from lowlevel asm headers too, to provide
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* wrapped versions of the local_irq_*() APIs, based on the
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* raw_local_irq_*() macros from the lowlevel headers.
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*/
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#ifndef _ASM_IRQFLAGS_H
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#define _ASM_IRQFLAGS_H
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#ifndef __ASSEMBLY__
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/* interrupt control.. */
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#define raw_local_save_flags(x) do { warn_if_not_ulong(x); __asm__ __volatile__("# save_flags \n\t pushfq ; popq %q0":"=g" (x): /* no input */ :"memory"); } while (0)
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#define raw_local_irq_restore(x) __asm__ __volatile__("# restore_flags \n\t pushq %0 ; popfq": /* no output */ :"g" (x):"memory", "cc")
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#ifdef CONFIG_X86_VSMP
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/* Interrupt control for VSMP architecture */
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#define raw_local_irq_disable() do { unsigned long flags; raw_local_save_flags(flags); raw_local_irq_restore((flags & ~(1 << 9)) | (1 << 18)); } while (0)
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#define raw_local_irq_enable() do { unsigned long flags; raw_local_save_flags(flags); raw_local_irq_restore((flags | (1 << 9)) & ~(1 << 18)); } while (0)
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#define raw_irqs_disabled_flags(flags) \
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({ \
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(flags & (1<<18)) || !(flags & (1<<9)); \
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})
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/* For spinlocks etc */
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#define raw_local_irq_save(x) do { raw_local_save_flags(x); raw_local_irq_restore((x & ~(1 << 9)) | (1 << 18)); } while (0)
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#else /* CONFIG_X86_VSMP */
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#define raw_local_irq_disable() __asm__ __volatile__("cli": : :"memory")
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#define raw_local_irq_enable() __asm__ __volatile__("sti": : :"memory")
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#define raw_irqs_disabled_flags(flags) \
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({ \
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!(flags & (1<<9)); \
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})
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/* For spinlocks etc */
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#define raw_local_irq_save(x) do { warn_if_not_ulong(x); __asm__ __volatile__("# raw_local_irq_save \n\t pushfq ; popq %0 ; cli":"=g" (x): /* no input */ :"memory"); } while (0)
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#endif
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#define raw_irqs_disabled() \
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({ \
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unsigned long flags; \
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raw_local_save_flags(flags); \
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raw_irqs_disabled_flags(flags); \
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})
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/* used in the idle loop; sti takes one instruction cycle to complete */
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#define raw_safe_halt() __asm__ __volatile__("sti; hlt": : :"memory")
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/* used when interrupts are already enabled or to shutdown the processor */
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#define halt() __asm__ __volatile__("hlt": : :"memory")
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#else /* __ASSEMBLY__: */
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# define TRACE_IRQS_ON
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# define TRACE_IRQS_OFF
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#endif
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#endif
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