u-boot/arch/nds32/include/asm/system.h
Wolfgang Denk 1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00

72 lines
1.4 KiB
C

/*
* Copyright (C) 2011 Andes Technology Corporation
* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __ASM_NDS_SYSTEM_H
#define __ASM_NDS_SYSTEM_H
/*
* Interrupt configuring macros.
*/
extern int irq_flags;
#define local_irq_enable() \
__asm__ __volatile__ ( \
"mfsr %0, $psw\n\t" \
"andi %0, %0, 0x1\n\t" \
"setgie.e\n\t" \
: \
: "r" (irq_flags) \
)
#define local_irq_disable() \
do { \
int __tmp_dummy; \
__asm__ __volatile__ ( \
"mfsr %0, $psw\n\t" \
"andi %0, %0, 0x1\n\t" \
"setgie.d\n\t" \
"dsb\n\t" \
: "=r" (__tmp_dummy) \
); \
} while (0)
#define local_irq_save(x) \
__asm__ __volatile__ ( \
"mfsr %0, $psw\n\t" \
"andi %0, %0, 0x1\n\t" \
"setgie.d\n\t" \
"dsb\n\t" \
: "=&r" (x) \
)
#define local_save_flags(x) \
__asm__ __volatile__ ( \
"mfsr %0, $psw\n\t" \
"andi %0, %0, 0x1\n\t" \
"setgie.e\n\t" \
"setgie.d\n\t" \
: "=r" (x) \
)
#define irqs_enabled_from_flags(x) ((x) != 0x1f)
#define local_irq_restore(x) \
do { \
if (irqs_enabled_from_flags(x)) \
local_irq_enable(); \
} while (0)
/*
* Force strict CPU ordering.
*/
#define nop() asm volatile ("nop;\n\t" : : )
#define mb() asm volatile ("" : : : "memory")
#define rmb() asm volatile ("" : : : "memory")
#define wmb() asm volatile ("" : : : "memory")
#endif /* __ASM_NDS_SYSTEM_H */