Viewing file:  irqflags.h (1.63 KB) -rw-r--r--
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#ifndef _M68K_IRQFLAGS_H
#define _M68K_IRQFLAGS_H
#include <linux/types.h>
#ifdef CONFIG_MMU
#include <linux/preempt_mask.h>
#endif
#include <linux/preempt.h>
#include <asm/thread_info.h>
#include <asm/entry.h>
static inline unsigned long arch_local_save_flags(void)
{
unsigned long flags;
asm volatile ("movew %%sr,%0" : "=d" (flags) : : "memory");
return flags;
}
static inline void arch_local_irq_disable(void)
{
#ifdef CONFIG_COLDFIRE
asm volatile (
"move %/sr,%%d0 \n\t"
"ori.l #0x0700,%%d0 \n\t"
"move %%d0,%/sr \n"
: /* no outputs */
:
: "cc", "%d0", "memory");
#else
asm volatile ("oriw #0x0700,%%sr" : : : "memory");
#endif
}
static inline void arch_local_irq_enable(void)
{
#if defined(CONFIG_COLDFIRE)
asm volatile (
"move %/sr,%%d0 \n\t"
"andi.l #0xf8ff,%%d0 \n\t"
"move %%d0,%/sr \n"
: /* no outputs */
:
: "cc", "%d0", "memory");
#else
# if defined(CONFIG_MMU)
if (MACH_IS_Q40 || !hardirq_count())
# endif
asm volatile (
"andiw %0,%%sr"
:
: "i" (ALLOWINT)
: "memory");
#endif
}
static inline unsigned long arch_local_irq_save(void)
{
unsigned long flags = arch_local_save_flags();
arch_local_irq_disable();
return flags;
}
static inline void arch_local_irq_restore(unsigned long flags)
{
asm volatile ("movew %0,%%sr" : : "d" (flags) : "memory");
}
static inline bool arch_irqs_disabled_flags(unsigned long flags)
{
if (MACH_IS_ATARI) {
/* Ignore HSYNC = ipl 2 on Atari */
return (flags & ~(ALLOWINT | 0x200)) != 0;
}
return (flags & ~ALLOWINT) != 0;
}
static inline bool arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
#endif /* _M68K_IRQFLAGS_H */
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