100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* 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
|
|
|
|
#include <asm/pal.h>
|
|
#include <asm/kregs.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)
|
|
{
|
|
arch_local_irq_enable();
|
|
ia64_pal_halt_light(); /* PAL_HALT_LIGHT */
|
|
}
|
|
|
|
|
|
#endif /* _ASM_IA64_IRQFLAGS_H */
|