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/
usr/
src/
linux-headers-3.0.0-14/
arch/
ia64/
include/
asm/
- drwxr-xr-x
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Viewing file:  irqflags.h (2 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* IRQ flags defines.
*
* Copyright (C) 1998-2003 Hewlett-Packard Co
* David Mosberger-Tang <davidm@hpl.hp.com>
* Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>
* Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
*/
#ifndef _ASM_IA64_IRQFLAGS_H
#define _ASM_IA64_IRQFLAGS_H
#ifdef CONFIG_IA64_DEBUG_IRQ
extern unsigned long last_cli_ip;
static inline void arch_maybe_save_ip(unsigned long flags)
{
if (flags & IA64_PSR_I)
last_cli_ip = ia64_getreg(_IA64_REG_IP);
}
#else
#define arch_maybe_save_ip(flags) do {} while (0)
#endif
/*
* - clearing psr.i is implicitly serialized (visible by next insn)
* - setting psr.i requires data serialization
* - we need a stop-bit before reading PSR because we sometimes
* write a floating-point register right before reading the PSR
* and that writes to PSR.mfl
*/
static inline unsigned long arch_local_save_flags(void)
{
ia64_stop();
#ifdef CONFIG_PARAVIRT
return ia64_get_psr_i();
#else
return ia64_getreg(_IA64_REG_PSR);
#endif
}
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags = arch_local_save_flags();
ia64_stop();
ia64_rsm(IA64_PSR_I);
arch_maybe_save_ip(flags);
return flags;
}
static inline void arch_local_irq_disable(void)
{
#ifdef CONFIG_IA64_DEBUG_IRQ
arch_local_irq_save();
#else
ia64_stop();
ia64_rsm(IA64_PSR_I);
#endif
}
static inline void arch_local_irq_enable(void)
{
ia64_stop();
ia64_ssm(IA64_PSR_I);
ia64_srlz_d();
}
static inline void arch_local_irq_restore(unsigned long flags)
{
#ifdef CONFIG_IA64_DEBUG_IRQ
unsigned long old_psr = arch_local_save_flags();
#endif
ia64_intrin_local_irq_restore(flags & IA64_PSR_I);
arch_maybe_save_ip(old_psr & ~flags);
}
static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
return (flags & IA64_PSR_I) == 0;
}
static inline bool arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
static inline void arch_safe_halt(void)
{
ia64_pal_halt_light(); /* PAL_HALT_LIGHT */
}
#endif /* _ASM_IA64_IRQFLAGS_H */
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