64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/*
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* IRQ flags handling
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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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/*
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* Get definitions for arch_local_save_flags(x), etc.
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*/
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#include <asm/hw_irq.h>
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#else
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#ifdef CONFIG_TRACE_IRQFLAGS
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#ifdef CONFIG_IRQSOFF_TRACER
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/*
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* Since the ftrace irqsoff latency trace checks CALLER_ADDR1,
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* which is the stack frame here, we need to force a stack frame
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* in case we came from user space.
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*/
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#define TRACE_WITH_FRAME_BUFFER(func) \
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mflr r0; \
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stdu r1, -32(r1); \
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std r0, 16(r1); \
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stdu r1, -32(r1); \
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bl func; \
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ld r1, 0(r1); \
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ld r1, 0(r1);
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#else
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#define TRACE_WITH_FRAME_BUFFER(func) \
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bl func;
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#endif
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/*
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* Most of the CPU's IRQ-state tracing is done from assembly code; we
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* have to call a C function so call a wrapper that saves all the
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* C-clobbered registers.
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*/
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#define TRACE_ENABLE_INTS TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_on)
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#define TRACE_DISABLE_INTS TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off)
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#define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip) \
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cmpdi en,0; \
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bne 95f; \
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stb en,PACASOFTIRQEN(r13); \
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TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_off) \
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b skip; \
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95: TRACE_WITH_FRAME_BUFFER(.trace_hardirqs_on) \
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li en,1;
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#define TRACE_AND_RESTORE_IRQ(en) \
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TRACE_AND_RESTORE_IRQ_PARTIAL(en,96f); \
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stb en,PACASOFTIRQEN(r13); \
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96:
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#else
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#define TRACE_ENABLE_INTS
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#define TRACE_DISABLE_INTS
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#define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip)
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#define TRACE_AND_RESTORE_IRQ(en) \
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stb en,PACASOFTIRQEN(r13)
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#endif
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#endif
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#endif
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