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/*
* 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 */
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