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
/*
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* Copyright IBM Corp. 2006,2010
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#ifndef __ASM_IRQFLAGS_H
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#define __ASM_IRQFLAGS_H
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#include <linux/types.h>
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/* store then or system mask. */
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#define __raw_local_irq_stosm(__or) \
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({ \
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unsigned long __mask; \
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asm volatile( \
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" stosm %0,%1" \
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: "=Q" (__mask) : "i" (__or) : "memory"); \
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__mask; \
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})
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/* store then and system mask. */
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#define __raw_local_irq_stnsm(__and) \
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({ \
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unsigned long __mask; \
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asm volatile( \
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" stnsm %0,%1" \
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: "=Q" (__mask) : "i" (__and) : "memory"); \
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__mask; \
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})
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/* set system mask. */
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#define __raw_local_irq_ssm(__mask) \
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({ \
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asm volatile("ssm %0" : : "Q" (__mask) : "memory"); \
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})
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/* interrupt control.. */
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static inline unsigned long raw_local_irq_enable(void)
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{
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return __raw_local_irq_stosm(0x03);
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}
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static inline unsigned long raw_local_irq_disable(void)
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{
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return __raw_local_irq_stnsm(0xfc);
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}
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#define raw_local_save_flags(x) \
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do { \
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typecheck(unsigned long, x); \
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(x) = __raw_local_irq_stosm(0x00); \
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} while (0)
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static inline void raw_local_irq_restore(unsigned long flags)
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{
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__raw_local_irq_ssm(flags);
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}
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static inline int raw_irqs_disabled_flags(unsigned long flags)
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{
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return !(flags & (3UL << (BITS_PER_LONG - 8)));
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}
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/* For spinlocks etc */
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#define raw_local_irq_save(x) ((x) = raw_local_irq_disable())
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#endif /* __ASM_IRQFLAGS_H */
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