linux/include/asm-powerpc/irqflags.h
Benjamin Herrenschmidt 945feb174b [POWERPC] irqtrace support for 64-bit powerpc
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>
2008-04-18 15:38:47 +10:00

44 lines
1 KiB
C

/*
* include/asm-powerpc/irqflags.h
*
* IRQ flags handling
*/
#ifndef _ASM_IRQFLAGS_H
#define _ASM_IRQFLAGS_H
#ifndef __ASSEMBLY__
/*
* Get definitions for raw_local_save_flags(x), etc.
*/
#include <asm-powerpc/hw_irq.h>
#else
#ifdef CONFIG_TRACE_IRQFLAGS
/*
* Most of the CPU's IRQ-state tracing is done from assembly code; we
* have to call a C function so call a wrapper that saves all the
* C-clobbered registers.
*/
#define TRACE_ENABLE_INTS bl .trace_hardirqs_on
#define TRACE_DISABLE_INTS bl .trace_hardirqs_off
#define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip) \
cmpdi en, 0; \
bne 95f; \
stb en,PACASOFTIRQEN(r13); \
bl .trace_hardirqs_off; \
b skip; \
95: bl .trace_hardirqs_on; \
li en,1;
#define TRACE_AND_RESTORE_IRQ(en) \
TRACE_AND_RESTORE_IRQ_PARTIAL(en,96f); \
96: stb en,PACASOFTIRQEN(r13)
#else
#define TRACE_ENABLE_INTS
#define TRACE_DISABLE_INTS
#define TRACE_AND_RESTORE_IRQ_PARTIAL(en,skip)
#define TRACE_AND_RESTORE_IRQ(en) \
stb en,PACASOFTIRQEN(r13)
#endif
#endif
#endif