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/*
* Copyright (C) 2012 Regents of the University of California
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _ASM_RISCV_IRQFLAGS_H
#define _ASM_RISCV_IRQFLAGS_H
#include <asm/processor.h>
#include <asm/csr.h>
/* read interrupt enabled status */
static inline unsigned long arch_local_save_flags(void)
{
return csr_read(CSR_SSTATUS);
}
/* unconditionally enable interrupts */
static inline void arch_local_irq_enable(void)
{
csr_set(CSR_SSTATUS, SR_SIE);
}
/* unconditionally disable interrupts */
static inline void arch_local_irq_disable(void)
{
csr_clear(CSR_SSTATUS, SR_SIE);
}
/* get status and disable interrupts */
static inline unsigned long arch_local_irq_save(void)
{
return csr_read_clear(CSR_SSTATUS, SR_SIE);
}
/* test flags */
static inline int arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & SR_SIE);
}
/* test hardware interrupt enable bit */
static inline int arch_irqs_disabled(void)
{
return arch_irqs_disabled_flags(arch_local_save_flags());
}
/* set interrupt enabled status */
static inline void arch_local_irq_restore(unsigned long flags)
{
csr_set(CSR_SSTATUS, flags & SR_SIE);
}
#endif /* _ASM_RISCV_IRQFLAGS_H */
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