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[POWERPC] irqtrace support for 64-bit powerpc

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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>
This commit is contained in:
Benjamin Herrenschmidt
2008-04-17 14:35:01 +10:00
committed by Paul Mackerras
parent fd3e0bbc60
commit 945feb174b
11 changed files with 136 additions and 54 deletions
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13
include/asm-powerpc/hw_irq.h
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@@ -27,7 +27,7 @@ static inline unsigned long local_get_flags(void)
return flags;
}
static inline unsigned long local_irq_disable(void)
static inline unsigned long raw_local_irq_disable(void)
{
unsigned long flags, zero;
@@ -39,14 +39,15 @@ static inline unsigned long local_irq_disable(void)
return flags;
}
extern void local_irq_restore(unsigned long);
extern void raw_local_irq_restore(unsigned long);
extern void iseries_handle_interrupts(void);
#define local_irq_enable() local_irq_restore(1)
#define local_save_flags(flags) ((flags) = local_get_flags())
#define local_irq_save(flags) ((flags) = local_irq_disable())
#define raw_local_irq_enable() raw_local_irq_restore(1)
#define raw_local_save_flags(flags) ((flags) = local_get_flags())
#define raw_local_irq_save(flags) ((flags) = raw_local_irq_disable())
#define irqs_disabled() (local_get_flags() == 0)
#define raw_irqs_disabled() (local_get_flags() == 0)
#define raw_irqs_disabled_flags(flags) ((flags) == 0)
#define __hard_irq_enable() __mtmsrd(mfmsr() | MSR_EE, 1)
#define __hard_irq_disable() __mtmsrd(mfmsr() & ~MSR_EE, 1)