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57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
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/*
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* include/asm-i386/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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#define raw_local_save_flags(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushfl ; popl %0":"=g" (x): /* no input */); } while (0)
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#define raw_local_irq_restore(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushl %0 ; popfl": /* no output */ :"g" (x):"memory", "cc"); } while (0)
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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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/* 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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#define raw_irqs_disabled_flags(flags) (!((flags) & (1<<9)))
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/* For spinlocks etc */
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#define raw_local_irq_save(x) __asm__ __volatile__("pushfl ; popl %0 ; cli":"=g" (x): /* no input */ :"memory")
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/*
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* Do the CPU's IRQ-state tracing from assembly code. We call a
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* C function, so save all the C-clobbered registers:
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*/
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#ifdef CONFIG_TRACE_IRQFLAGS
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# define TRACE_IRQS_ON \
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pushl %eax; \
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pushl %ecx; \
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pushl %edx; \
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call trace_hardirqs_on; \
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popl %edx; \
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popl %ecx; \
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popl %eax;
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# define TRACE_IRQS_OFF \
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pushl %eax; \
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pushl %ecx; \
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pushl %edx; \
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call trace_hardirqs_off; \
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popl %edx; \
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popl %ecx; \
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popl %eax;
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#else
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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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