mirror of https://gitee.com/openkylin/linux.git
83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
#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 */
|