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
1.0 KiB
C
45 lines
1.0 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
|