945feb174b
This adds the low level irq tracing hooks to the powerpc architecture needed to enable full lockdep functionality. This is partly based on Johannes Berg's initial version. I removed the asm trampoline that isn't needed (thus improving performance) and modified all sorts of bits and pieces, reworking most of the assembly, etc... Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
45 lines
1 KiB
C
45 lines
1 KiB
C
/*
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* include/asm-powerpc/irqflags.h
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*
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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 raw_local_save_flags(x), etc.
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*/
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#include <asm-powerpc/hw_irq.h>
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#else
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#ifdef CONFIG_TRACE_IRQFLAGS
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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 bl .trace_hardirqs_on
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#define TRACE_DISABLE_INTS bl .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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bl .trace_hardirqs_off; \
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b skip; \
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95: bl .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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96: stb en,PACASOFTIRQEN(r13)
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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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