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author | Ingo Molnar <mingo@elte.hu> | 2006-07-03 00:24:45 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-03 15:27:03 -0700 |
commit | 2601e64d262ee5ed4d4a5737345803800d9c4db3 (patch) | |
tree | 67f852752af3c54f745b93f7016cdd7c5ffb1a14 /include/asm-x86_64/irqflags.h | |
parent | c8558fcdecb1f920df8050be4f2d5f499060030e (diff) | |
download | kernel_samsung_tuna-2601e64d262ee5ed4d4a5737345803800d9c4db3.zip kernel_samsung_tuna-2601e64d262ee5ed4d4a5737345803800d9c4db3.tar.gz kernel_samsung_tuna-2601e64d262ee5ed4d4a5737345803800d9c4db3.tar.bz2 |
[PATCH] lockdep: irqtrace subsystem, x86_64 support
Add irqflags-tracing support to x86_64.
[akpm@osdl.org: build fix]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64/irqflags.h')
-rw-r--r-- | include/asm-x86_64/irqflags.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/asm-x86_64/irqflags.h b/include/asm-x86_64/irqflags.h new file mode 100644 index 0000000..22f3c06 --- /dev/null +++ b/include/asm-x86_64/irqflags.h @@ -0,0 +1,61 @@ +/* + * include/asm-x86_64/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__ + +/* interrupt control.. */ +#define raw_local_save_flags(x) do { warn_if_not_ulong(x); __asm__ __volatile__("# save_flags \n\t pushfq ; popq %q0":"=g" (x): /* no input */ :"memory"); } while (0) +#define raw_local_irq_restore(x) __asm__ __volatile__("# restore_flags \n\t pushq %0 ; popfq": /* no output */ :"g" (x):"memory", "cc") + +#ifdef CONFIG_X86_VSMP +/* Interrupt control for VSMP architecture */ +#define raw_local_irq_disable() do { unsigned long flags; raw_local_save_flags(flags); raw_local_irq_restore((flags & ~(1 << 9)) | (1 << 18)); } while (0) +#define raw_local_irq_enable() do { unsigned long flags; raw_local_save_flags(flags); raw_local_irq_restore((flags | (1 << 9)) & ~(1 << 18)); } while (0) + +#define raw_irqs_disabled_flags(flags) \ +({ \ + (flags & (1<<18)) || !(flags & (1<<9)); \ +}) + +/* For spinlocks etc */ +#define raw_local_irq_save(x) do { raw_local_save_flags(x); raw_local_irq_restore((x & ~(1 << 9)) | (1 << 18)); } while (0) +#else /* CONFIG_X86_VSMP */ +#define raw_local_irq_disable() __asm__ __volatile__("cli": : :"memory") +#define raw_local_irq_enable() __asm__ __volatile__("sti": : :"memory") + +#define raw_irqs_disabled_flags(flags) \ +({ \ + !(flags & (1<<9)); \ +}) + +/* For spinlocks etc */ +#define raw_local_irq_save(x) do { warn_if_not_ulong(x); __asm__ __volatile__("# raw_local_irq_save \n\t pushfq ; popq %0 ; cli":"=g" (x): /* no input */ :"memory"); } while (0) +#endif + +#define raw_irqs_disabled() \ +({ \ + unsigned long flags; \ + raw_local_save_flags(flags); \ + raw_irqs_disabled_flags(flags); \ +}) + +/* used in the idle loop; sti takes one instruction cycle to complete */ +#define raw_safe_halt() __asm__ __volatile__("sti; hlt": : :"memory") +/* used when interrupts are already enabled or to shutdown the processor */ +#define halt() __asm__ __volatile__("hlt": : :"memory") + +#else /* __ASSEMBLY__: */ +# define TRACE_IRQS_ON +# define TRACE_IRQS_OFF +#endif + +#endif |