diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-04-17 14:35:01 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-04-18 15:38:47 +1000 |
| commit | 945feb174b14e7098cc7ecf0cf4768d35bc52f9c (patch) | |
| tree | 9810b2ff0efe8edbfb1506f65834ea0d553e2848 /include/asm-powerpc/irqflags.h | |
| parent | fd3e0bbc6052ca9747a5332b382584ece83aab6d (diff) | |
[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>
Diffstat (limited to 'include/asm-powerpc/irqflags.h')
| -rw-r--r-- | include/asm-powerpc/irqflags.h | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/include/asm-powerpc/irqflags.h b/include/asm-powerpc/irqflags.h index 7970cbaeaa54..cc6fdba33660 100644 --- a/include/asm-powerpc/irqflags.h +++ b/include/asm-powerpc/irqflags.h @@ -2,30 +2,43 @@ * include/asm-powerpc/irqflags.h * * IRQ flags handling - * - * This file gets included from lowlevel asm headers too, to provide - * wrapped versions of the local_irq_*() APIs, based on the - * raw_local_irq_*() macros from the lowlevel headers. */ #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 /* - * Do the CPU's IRQ-state tracing from assembly code. We call a - * C function, so save all the C-clobbered registers: + * 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. */ -#ifdef CONFIG_TRACE_IRQFLAGS - -#error No support on PowerPC yet for CONFIG_TRACE_IRQFLAGS - +#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_IRQS_ON -# define TRACE_IRQS_OFF +#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 |