f27ffc751c
This patch adds the support for IRQ handling. Signed-off-by: Ley Foon Tan <lftan@altera.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/*
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* Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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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 <asm/registers.h>
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static inline unsigned long arch_local_save_flags(void)
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{
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return RDCTL(CTL_STATUS);
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}
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/*
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* This will restore ALL status register flags, not only the interrupt
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* mask flag.
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*/
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static inline void arch_local_irq_restore(unsigned long flags)
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{
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WRCTL(CTL_STATUS, flags);
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}
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static inline void arch_local_irq_disable(void)
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{
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unsigned long flags;
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flags = arch_local_save_flags();
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arch_local_irq_restore(flags & ~STATUS_PIE);
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}
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static inline void arch_local_irq_enable(void)
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{
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unsigned long flags;
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flags = arch_local_save_flags();
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arch_local_irq_restore(flags | STATUS_PIE);
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}
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static inline int arch_irqs_disabled_flags(unsigned long flags)
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{
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return (flags & STATUS_PIE) == 0;
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}
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static inline int arch_irqs_disabled(void)
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{
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return arch_irqs_disabled_flags(arch_local_save_flags());
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}
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static inline unsigned long arch_local_irq_save(void)
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{
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unsigned long flags;
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flags = arch_local_save_flags();
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arch_local_irq_restore(flags & ~STATUS_PIE);
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return flags;
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}
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#endif /* _ASM_IRQFLAGS_H */
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