mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-18 18:23:53 +08:00
987bcdacb1
Drop support to compile the kernel with gcc versions older than 3.3.3. This allows us to use the "Q" inline assembly contraint on some more inline assemblies without duplicating a lot of complex code (e.g. __xchg and __cmpxchg). The distinction for older gcc versions can be removed which saves a few lines and simplifies the code. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
68 lines
1.5 KiB
C
68 lines
1.5 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>
|
|
|
|
/* store then or system mask. */
|
|
#define __raw_local_irq_stosm(__or) \
|
|
({ \
|
|
unsigned long __mask; \
|
|
asm volatile( \
|
|
" stosm %0,%1" \
|
|
: "=Q" (__mask) : "i" (__or) : "memory"); \
|
|
__mask; \
|
|
})
|
|
|
|
/* store then and system mask. */
|
|
#define __raw_local_irq_stnsm(__and) \
|
|
({ \
|
|
unsigned long __mask; \
|
|
asm volatile( \
|
|
" stnsm %0,%1" \
|
|
: "=Q" (__mask) : "i" (__and) : "memory"); \
|
|
__mask; \
|
|
})
|
|
|
|
/* set system mask. */
|
|
#define __raw_local_irq_ssm(__mask) \
|
|
({ \
|
|
asm volatile("ssm %0" : : "Q" (__mask) : "memory"); \
|
|
})
|
|
|
|
/* interrupt control.. */
|
|
static inline unsigned long raw_local_irq_enable(void)
|
|
{
|
|
return __raw_local_irq_stosm(0x03);
|
|
}
|
|
|
|
static inline unsigned long raw_local_irq_disable(void)
|
|
{
|
|
return __raw_local_irq_stnsm(0xfc);
|
|
}
|
|
|
|
#define raw_local_save_flags(x) \
|
|
do { \
|
|
typecheck(unsigned long, x); \
|
|
(x) = __raw_local_irq_stosm(0x00); \
|
|
} while (0)
|
|
|
|
static inline void raw_local_irq_restore(unsigned long flags)
|
|
{
|
|
__raw_local_irq_ssm(flags);
|
|
}
|
|
|
|
static inline int raw_irqs_disabled_flags(unsigned long flags)
|
|
{
|
|
return !(flags & (3UL << (BITS_PER_LONG - 8)));
|
|
}
|
|
|
|
/* For spinlocks etc */
|
|
#define raw_local_irq_save(x) ((x) = raw_local_irq_disable())
|
|
|
|
#endif /* __ASM_IRQFLAGS_H */
|