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/*
* Copyright (C) 2006 Atmark Techno, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef _ASM_MICROBLAZE_IRQFLAGS_H
#define _ASM_MICROBLAZE_IRQFLAGS_H
#include <linux/irqflags.h>
#include <asm/registers.h>
# if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
# define raw_local_irq_save(flags) \
do { \
asm volatile (" msrclr %0, %1; \
nop;" \
: "=r"(flags) \
: "i"(MSR_IE) \
: "memory"); \
} while (0)
# define raw_local_irq_disable() \
do { \
asm volatile (" msrclr r0, %0; \
nop;" \
: \
: "i"(MSR_IE) \
: "memory"); \
} while (0)
# define raw_local_irq_enable() \
do { \
asm volatile (" msrset r0, %0; \
nop;" \
: \
: "i"(MSR_IE) \
: "memory"); \
} while (0)
# else /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR == 0 */
# define raw_local_irq_save(flags) \
do { \
register unsigned tmp; \
asm volatile (" mfs %0, rmsr; \
nop; \
andi %1, %0, %2; \
mts rmsr, %1; \
nop;" \
: "=r"(flags), "=r" (tmp) \
: "i"(~MSR_IE) \
: "memory"); \
} while (0)
# define raw_local_irq_disable() \
do { \
register unsigned tmp; \
asm volatile (" mfs %0, rmsr; \
nop; \
andi %0, %0, %1; \
mts rmsr, %0; \
nop;" \
: "=r"(tmp) \
: "i"(~MSR_IE) \
: "memory"); \
} while (0)
# define raw_local_irq_enable() \
do { \
register unsigned tmp; \
asm volatile (" mfs %0, rmsr; \
nop; \
ori %0, %0, %1; \
mts rmsr, %0; \
nop;" \
: "=r"(tmp) \
: "i"(MSR_IE) \
: "memory"); \
} while (0)
# endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
#define raw_local_irq_restore(flags) \
do { \
asm volatile (" mts rmsr, %0; \
nop;" \
: \
: "r"(flags) \
: "memory"); \
} while (0)
static inline unsigned long get_msr(void)
{
unsigned long flags;
asm volatile (" mfs %0, rmsr; \
nop;" \
: "=r"(flags) \
: \
: "memory"); \
return flags;
}
#define raw_local_save_flags(flags) ((flags) = get_msr())
#define raw_irqs_disabled() ((get_msr() & MSR_IE) == 0)
#define raw_irqs_disabled_flags(flags) ((flags & MSR_IE) == 0)
#endif /* _ASM_MICROBLAZE_IRQFLAGS_H */
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