78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
|
/*
|
||
|
|
* Copyright IBM Corp. 2006, 2010
|
||
|
|
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __ASM_IRQFLAGS_H
|
||
|
|
#define __ASM_IRQFLAGS_H
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
|
||
|
|
#define ARCH_IRQ_ENABLED (3UL << (BITS_PER_LONG - 8))
|
||
|
|
|
||
|
|
/* store then OR system mask. */
|
||
|
|
#define __arch_local_irq_stosm(__or) \
|
||
|
|
({ \
|
||
|
|
unsigned long __mask; \
|
||
|
|
asm volatile( \
|
||
|
|
" stosm %0,%1" \
|
||
|
|
: "=Q" (__mask) : "i" (__or) : "memory"); \
|
||
|
|
__mask; \
|
||
|
|
})
|
||
|
|
|
||
|
|
/* store then AND system mask. */
|
||
|
|
#define __arch_local_irq_stnsm(__and) \
|
||
|
|
({ \
|
||
|
|
unsigned long __mask; \
|
||
|
|
asm volatile( \
|
||
|
|
" stnsm %0,%1" \
|
||
|
|
: "=Q" (__mask) : "i" (__and) : "memory"); \
|
||
|
|
__mask; \
|
||
|
|
})
|
||
|
|
|
||
|
|
/* set system mask. */
|
||
|
|
static inline notrace void __arch_local_irq_ssm(unsigned long flags)
|
||
|
|
{
|
||
|
|
asm volatile("ssm %0" : : "Q" (flags) : "memory");
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline notrace unsigned long arch_local_save_flags(void)
|
||
|
|
{
|
||
|
|
return __arch_local_irq_stnsm(0xff);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline notrace unsigned long arch_local_irq_save(void)
|
||
|
|
{
|
||
|
|
return __arch_local_irq_stnsm(0xfc);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline notrace void arch_local_irq_disable(void)
|
||
|
|
{
|
||
|
|
arch_local_irq_save();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline notrace void arch_local_irq_enable(void)
|
||
|
|
{
|
||
|
|
__arch_local_irq_stosm(0x03);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This only restores external and I/O interrupt state */
|
||
|
|
static inline notrace void arch_local_irq_restore(unsigned long flags)
|
||
|
|
{
|
||
|
|
/* only disabled->disabled and disabled->enabled is valid */
|
||
|
|
if (flags & ARCH_IRQ_ENABLED)
|
||
|
|
arch_local_irq_enable();
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
|
||
|
|
{
|
||
|
|
return !(flags & ARCH_IRQ_ENABLED);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline notrace bool arch_irqs_disabled(void)
|
||
|
|
{
|
||
|
|
return arch_irqs_disabled_flags(arch_local_save_flags());
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* __ASM_IRQFLAGS_H */
|